/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.webkit;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnCancelListener;
import android.database.DataSetObserver;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Picture;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.Region;
import android.net.http.SslCertificate;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.provider.Checkin;
import android.text.IClipboard;
import android.text.Selection;
import android.text.Spannable;
import android.util.AttributeSet;
import android.util.EventLog;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.SoundEffectConstants;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.view.ViewTreeObserver;
import android.view.animation.AlphaAnimation;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebTextView.AutoCompleteAdapter;
import android.webkit.WebViewCore.EventHub;
import android.widget.AbsoluteLayout;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Scroller;
import android.widget.Toast;
import android.widget.ZoomButtonsController;
import android.widget.ZoomControls;
import android.widget.AdapterView.OnItemClickListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
/**
* <p>A View that displays web pages. This class is the basis upon which you
* can roll your own web browser or simply display some online content within your Activity.
* It uses the WebKit rendering engine to display
* web pages and includes methods to navigate forward and backward
* through a history, zoom in and out, perform text searches and more.</p>
* <p>To enable the built-in zoom, set
* {@link #getSettings() WebSettings}.{@link WebSettings#setBuiltInZoomControls(boolean)}
* (introduced in API version 3).
* <p>Note that, in order for your Activity to access the Internet and load web pages
* in a WebView, you must add the <var>INTERNET</var> permissions to your
* Android Manifest file:</p>
* <pre><uses-permission android:name="android.permission.INTERNET" /></pre>
*
* <p>This must be a child of the <code><manifest></code> element.</p>
*
* <h3>Basic usage</h3>
*
* <p>By default, a WebView provides no browser-like widgets, does not
* enable JavaScript and errors will be ignored. If your goal is only
* to display some HTML as a part of your UI, this is probably fine;
* the user won't need to interact with the web page beyond reading
* it, and the web page won't need to interact with the user. If you
* actually want a fully blown web browser, then you probably want to
* invoke the Browser application with your URL rather than show it
* with a WebView. See {@link android.content.Intent} for more information.</p>
*
* <pre class="prettyprint">
* WebView webview = new WebView(this);
* setContentView(webview);
*
* // Simplest usage: note that an exception will NOT be thrown
* // if there is an error loading this page (see below).
* webview.loadUrl("http://slashdot.org/");
*
* // Of course you can also load from any string:
* String summary = "<html><body>You scored <b>192</b> points.</body></html>";
* webview.loadData(summary, "text/html", "utf-8");
* // ... although note that there are restrictions on what this HTML can do.
* // See the JavaDocs for loadData and loadDataWithBaseUrl for more info.
* </pre>
*
* <p>A WebView has several customization points where you can add your
* own behavior. These are:</p>
*
* <ul>
* <li>Creating and setting a {@link android.webkit.WebChromeClient} subclass.
* This class is called when something that might impact a
* browser UI happens, for instance, progress updates and
* JavaScript alerts are sent here.
* </li>
* <li>Creating and setting a {@link android.webkit.WebViewClient} subclass.
* It will be called when things happen that impact the
* rendering of the content, eg, errors or form submissions. You
* can also intercept URL loading here.</li>
* <li>Via the {@link android.webkit.WebSettings} class, which contains
* miscellaneous configuration. </li>
* <li>With the {@link android.webkit.WebView#addJavascriptInterface} method.
* This lets you bind Java objects into the WebView so they can be
* controlled from the web pages JavaScript.</li>
* </ul>
*
* <p>Here's a more complicated example, showing error handling,
* settings, and progress notification:</p>
*
* <pre class="prettyprint">
* // Let's display the progress in the activity title bar, like the
* // browser app does.
* getWindow().requestFeature(Window.FEATURE_PROGRESS);
*
* webview.getSettings().setJavaScriptEnabled(true);
*
* final Activity activity = this;
* webview.setWebChromeClient(new WebChromeClient() {
* public void onProgressChanged(WebView view, int progress) {
* // Activities and WebViews measure progress with different scales.
* // The progress meter will automatically disappear when we reach 100%
* activity.setProgress(progress * 1000);
* }
* });
* webview.setWebViewClient(new WebViewClient() {
* public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
* Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
* }
* });
*
* webview.loadUrl("http://slashdot.org/");
* </pre>
*
* <h3>Cookie and window management</h3>
*
* <p>For obvious security reasons, your application has its own
* cache, cookie store etc - it does not share the Browser
* applications data. Cookies are managed on a separate thread, so
* operations like index building don't block the UI
* thread. Follow the instructions in {@link android.webkit.CookieSyncManager}
* if you want to use cookies in your application.
* </p>
*
* <p>By default, requests by the HTML to open new windows are
* ignored. This is true whether they be opened by JavaScript or by
* the target attribute on a link. You can customize your
* WebChromeClient to provide your own behaviour for opening multiple windows,
* and render them in whatever manner you want.</p>
*
* <p>Standard behavior for an Activity is to be destroyed and
* recreated when the devices orientation is changed. This will cause
* the WebView to reload the current page. If you don't want that, you
* can set your Activity to handle the orientation and keyboardHidden
* changes, and then just leave the WebView alone. It'll automatically
* re-orient itself as appropriate.</p>
*/
public class WebView extends AbsoluteLayout
implements ViewTreeObserver.OnGlobalFocusChangeListener,
ViewGroup.OnHierarchyChangeListener {
// if AUTO_REDRAW_HACK is true, then the CALL key will toggle redrawing
// the screen all-the-time. Good for profiling our drawing code
static private final boolean AUTO_REDRAW_HACK = false;
// true means redraw the screen all-the-time. Only with AUTO_REDRAW_HACK
private boolean mAutoRedraw;
static final String LOGTAG = "webview";
private static class ExtendedZoomControls extends FrameLayout {
public ExtendedZoomControls(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(com.android.internal.R.layout.zoom_magnify, this, true);
mPlusMinusZoomControls = (ZoomControls) findViewById(
com.android.internal.R.id.zoomControls);
mZoomMagnify = (ImageView) findViewById(com.android.internal.R.id.zoomMagnify);
}
public void show(boolean showZoom, boolean canZoomOut) {
mPlusMinusZoomControls.setVisibility(
showZoom ? View.VISIBLE : View.GONE);
mZoomMagnify.setVisibility(canZoomOut ? View.VISIBLE : View.GONE);
fade(View.VISIBLE, 0.0f, 1.0f);
}
public void hide() {
fade(View.GONE, 1.0f, 0.0f);
}
private void fade(int visibility, float startAlpha, float endAlpha) {
AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha);
anim.setDuration(500);
startAnimation(anim);
setVisibility(visibility);
}
public void setIsZoomMagnifyEnabled(boolean isEnabled) {
mZoomMagnify.setEnabled(isEnabled);
}
public boolean hasFocus() {
return mPlusMinusZoomControls.hasFocus() || mZoomMagnify.hasFocus();
}
public void setOnZoomInClickListener(OnClickListener listener) {
mPlusMinusZoomControls.setOnZoomInClickListener(listener);
}
public void setOnZoomOutClickListener(OnClickListener listener) {
mPlusMinusZoomControls.setOnZoomOutClickListener(listener);
}
public void setOnZoomMagnifyClickListener(OnClickListener listener) {
mZoomMagnify.setOnClickListener(listener);
}
ZoomControls mPlusMinusZoomControls;
ImageView mZoomMagnify;
}
/**
* Transportation object for returning WebView across thread boundaries.
*/
public class WebViewTransport {
private WebView mWebview;
/**
* Set the WebView to the transportation object.
* @param webview The WebView to transport.
*/
public synchronized void setWebView(WebView webview) {
mWebview = webview;
}
/**
* Return the WebView object.
* @return WebView The transported WebView object.
*/
public synchronized WebView getWebView() {
return mWebview;
}
}
// A final CallbackProxy shared by WebViewCore and BrowserFrame.
private final CallbackProxy mCallbackProxy;
private final WebViewDatabase mDatabase;
// SSL certificate for the main top-level page (if secure)
private SslCertificate mCertificate;
// Native WebView pointer that is 0 until the native object has been
// created.
private int mNativeClass;
// This would be final but it needs to be set to null when the WebView is
// destroyed.
private WebViewCore mWebViewCore;
// Handler for dispatching UI messages.
/* package */ final Handler mPrivateHandler = new PrivateHandler();
private WebTextView mWebTextView;
// Used to ignore changes to webkit text that arrives to the UI side after
// more key events.
private int mTextGeneration;
// Used by WebViewCore to create child views.
/* package */ final ViewManager mViewManager;
/**
* Position of the last touch event.
*/
private float mLastTouchX;
private float mLastTouchY;
/**
* Time of the last touch event.
*/
private long mLastTouchTime;
/**
* Time of the last time sending touch event to WebViewCore
*/
private long mLastSentTouchTime;
/**
* The minimum elapsed time before sending another ACTION_MOVE event to
* WebViewCore. This really should be tuned for each type of the devices.
* For example in Google Map api test case, it takes Dream device at least
* 150ms to do a full cycle in the WebViewCore by processing a touch event,
* triggering the layout and drawing the picture. While the same process
* takes 60+ms on the current high speed device. If we make
* TOUCH_SENT_INTERVAL too small, there will be multiple touch events sent
* to WebViewCore queue and the real layout and draw events will be pushed
* to further, which slows down the refresh rate. Choose 50 to favor the
* current high speed devices. For Dream like devices, 100 is a better
* choice. Maybe make this in the buildspec later.
*/
private static final int TOUCH_SENT_INTERVAL = 50;
/**
* Helper class to get velocity for fling
*/
VelocityTracker mVelocityTracker;
private int mMaximumFling;
// use this flag to control whether enabling the new double tap zoom
static final boolean ENABLE_DOUBLETAP_ZOOM = true;
/**
* Touch mode
*/
private int mTouchMode = TOUCH_DONE_MODE;
private static final int TOUCH_INIT_MODE = 1;
private static final int TOUCH_DRAG_START_MODE = 2;
private static final int TOUCH_DRAG_MODE = 3;
private static final int TOUCH_SHORTPRESS_START_MODE = 4;
private static final int TOUCH_SHORTPRESS_MODE = 5;
private static final int TOUCH_DOUBLECLICK_MODE = 6;
private static final int TOUCH_DONE_MODE = 7;
private static final int TOUCH_SELECT_MODE = 8;
// touch mode values specific to scale+scroll
private static final int FIRST_SCROLL_ZOOM = 9;
private static final int SCROLL_ZOOM_ANIMATION_IN = 9;
private static final int SCROLL_ZOOM_ANIMATION_OUT = 10;
private static final int SCROLL_ZOOM_OUT = 11;
private static final int LAST_SCROLL_ZOOM = 11;
// end of touch mode values specific to scale+scroll
private static final int TOUCH_DOUBLE_TAP_MODE = 12;
// Whether to forward the touch events to WebCore
private boolean mForwardTouchEvents = false;
// Whether to prevent drag during touch. The initial value depends on
// mForwardTouchEvents. If WebCore wants touch events, we assume it will
// take control of touch events unless it says no for touch down event.
private boolean mPreventDrag;
// To keep track of whether the current drag was initiated by a WebTextView,
// so that we know not to hide the cursor
boolean mDragFromTextInput;
// Whether or not to draw the cursor ring.
private boolean mDrawCursorRing = true;
// true if onPause has been called (and not onResume)
private boolean mIsPaused;
/**
* Customizable constant
*/
// pre-computed square of ViewConfiguration.getScaledTouchSlop()
private int mTouchSlopSquare;
// pre-computed square of ViewConfiguration.getScaledDoubleTapSlop()
private int mDoubleTapSlopSquare;
// pre-computed density adjusted navigation slop
private int mNavSlop;
// This should be ViewConfiguration.getTapTimeout()
// But system time out is 100ms, which is too short for the browser.
// In the browser, if it switches out of tap too soon, jump tap won't work.
private static final int TAP_TIMEOUT = 200;
// This should be ViewConfiguration.getLongPressTimeout()
// But system time out is 500ms, which is too short for the browser.
// With a short timeout, it's difficult to treat trigger a short press.
private static final int LONG_PRESS_TIMEOUT = 1000;
// needed to avoid flinging after a pause of no movement
private static final int MIN_FLING_TIME = 250;
// The time that the Zoom Controls are visible before fading away
private static final long ZOOM_CONTROLS_TIMEOUT =
ViewConfiguration.getZoomControlsTimeout();
// The amount of content to overlap between two screens when going through
// pages with the space bar, in pixels.
private static final int PAGE_SCROLL_OVERLAP = 24;
/**
* These prevent calling requestLayout if either dimension is fixed. This
* depends on the layout parameters and the measure specs.
*/
boolean mWidthCanMeasure;
boolean mHeightCanMeasure;
// Remember the last dimensions we sent to the native side so we can avoid
// sending the same dimensions more than once.
int mLastWidthSent;
int mLastHeightSent;
private int mContentWidth; // cache of value from WebViewCore
private int mContentHeight; // cache of value from WebViewCore
// Need to have the separate control for horizontal and vertical scrollbar
// style than the View's single scrollbar style
private boolean mOverlayHorizontalScrollbar = true;
private boolean mOverlayVerticalScrollbar = false;
// our standard speed. this way small distances will be traversed in less
// time than large distances, but we cap the duration, so that very large
// distances won't take too long to get there.
private static final int STD_SPEED = 480; // pixels per second
// time for the longest scroll animation
private static final int MAX_DURATION = 750; // milliseconds
private Scroller mScroller;
private boolean mWrapContent;
/**
* Private message ids
*/
private static final int REMEMBER_PASSWORD = 1;
private static final int NEVER_REMEMBER_PASSWORD = 2;
private static final int SWITCH_TO_SHORTPRESS = 3;
private static final int SWITCH_TO_LONGPRESS = 4;
private static final int RELEASE_SINGLE_TAP = 5;
private static final int REQUEST_FORM_DATA = 6;
private static final int SWITCH_TO_CLICK = 7;
private static final int RESUME_WEBCORE_UPDATE = 8;
//! arg1=x, arg2=y
static final int SCROLL_TO_MSG_ID = 10;
static final int SCROLL_BY_MSG_ID = 11;
//! arg1=x, arg2=y
static final int SPAWN_SCROLL_TO_MSG_ID = 12;
//! arg1=x, arg2=y
static final int SYNC_SCROLL_TO_MSG_ID = 13;
static final int NEW_PICTURE_MSG_ID = 14;
static final int UPDATE_TEXT_ENTRY_MSG_ID = 15;
static final int WEBCORE_INITIALIZED_MSG_ID = 16;
static final int UPDATE_TEXTFIELD_TEXT_MSG_ID = 17;
static final int MOVE_OUT_OF_PLUGIN = 19;
static final int CLEAR_TEXT_ENTRY = 20;
static final int UPDATE_TEXT_SELECTION_MSG_ID = 21;
static final int UPDATE_CLIPBOARD = 22;
static final int LONG_PRESS_CENTER = 23;
static final int PREVENT_TOUCH_ID = 24;
static final int WEBCORE_NEED_TOUCH_EVENTS = 25;
// obj=Rect in doc coordinates
static final int INVAL_RECT_MSG_ID = 26;
static final int REQUEST_KEYBOARD = 27;
static final String[] HandlerDebugString = {
"REMEMBER_PASSWORD", // = 1;
"NEVER_REMEMBER_PASSWORD", // = 2;
"SWITCH_TO_SHORTPRESS", // = 3;
"SWITCH_TO_LONGPRESS", // = 4;
"RELEASE_SINGLE_TAP", // = 5;
"REQUEST_FORM_DATA", // = 6;
"SWITCH_TO_CLICK", // = 7;
"RESUME_WEBCORE_UPDATE", // = 8;
"9",
"SCROLL_TO_MSG_ID", // = 10;
"SCROLL_BY_MSG_ID", // = 11;
"SPAWN_SCROLL_TO_MSG_ID", // = 12;
"SYNC_SCROLL_TO_MSG_ID", // = 13;
"NEW_PICTURE_MSG_ID", // = 14;
"UPDATE_TEXT_ENTRY_MSG_ID", // = 15;
"WEBCORE_INITIALIZED_MSG_ID", // = 16;
"UPDATE_TEXTFIELD_TEXT_MSG_ID", // = 17;
"18", // = 18;
"MOVE_OUT_OF_PLUGIN", // = 19;
"CLEAR_TEXT_ENTRY", // = 20;
"UPDATE_TEXT_SELECTION_MSG_ID", // = 21;
"UPDATE_CLIPBOARD", // = 22;
"LONG_PRESS_CENTER", // = 23;
"PREVENT_TOUCH_ID", // = 24;
"WEBCORE_NEED_TOUCH_EVENTS", // = 25;
"INVAL_RECT_MSG_ID", // = 26;
"REQUEST_KEYBOARD" // = 27;
};
// default scale limit. Depending on the display density
private static float DEFAULT_MAX_ZOOM_SCALE;
private static float DEFAULT_MIN_ZOOM_SCALE;
// scale limit, which can be set through viewport meta tag in the web page
private float mMaxZoomScale;
private float mMinZoomScale;
private boolean mMinZoomScaleFixed = true;
// initial scale in percent. 0 means using default.
private int mInitialScale = 0;
// while in the zoom overview mode, the page's width is fully fit to the
// current window. The page is alive, in another words, you can click to
// follow the links. Double tap will toggle between zoom overview mode and
// the last zoom scale.
boolean mInZoomOverview = false;
// ideally mZoomOverviewWidth should be mContentWidth. But sites like espn,
// engadget always have wider mContentWidth no matter what viewport size is.
int mZoomOverviewWidth = WebViewCore.DEFAULT_VIEWPORT_WIDTH;
float mLastScale;
// default scale. Depending on the display density.
static int DEFAULT_SCALE_PERCENT;
private float mDefaultScale;
// set to true temporarily while the zoom control is being dragged
private boolean mPreviewZoomOnly = false;
// computed scale and inverse, from mZoomWidth.
private float mActualScale;
private float mInvActualScale;
// if this is non-zero, it is used on drawing rather than mActualScale
private float mZoomScale;
private float mInvInitialZoomScale;
private float mInvFinalZoomScale;
private int mInitialScrollX;
private int mInitialScrollY;
private long mZoomStart;
private static final int ZOOM_ANIMATION_LENGTH = 500;
private boolean mUserScroll = false;
private int mSnapScrollMode = SNAP_NONE;
private static final int SNAP_NONE = 1;
private static final int SNAP_X = 2;
private static final int SNAP_Y = 3;
private static final int SNAP_X_LOCK = 4;
private static final int SNAP_Y_LOCK = 5;
private boolean mSnapPositive;
// Used to match key downs and key ups
private boolean mGotKeyDown;
/* package */ static boolean mLogEvent = true;
private static final int EVENT_LOG_ZOOM_LEVEL_CHANGE = 70101;
private static final int EVENT_LOG_DOUBLE_TAP_DURATION = 70102;
// for event log
private long mLastTouchUpTime = 0;
/**
* URI scheme for telephone number
*/
public static final String SCHEME_TEL = "tel:";
/**
* URI scheme for email address
*/
public static final String SCHEME_MAILTO = "mailto:";
/**
* URI scheme for map address
*/
public static final String SCHEME_GEO = "geo:0,0?q=";
private int mBackgroundColor = Color.WHITE;
// Used to notify listeners of a new picture.
private PictureListener mPictureListener;
/**
* Interface to listen for new pictures as they change.
*/
public interface PictureListener {
/**
* Notify the listener that the picture has changed.
* @param view The WebView that owns the picture.
* @param picture The new picture.
*/
public void onNewPicture(WebView view, Picture picture);
}
// FIXME: Want to make this public, but need to change the API file.
public /*static*/ class HitTestResult {
/**
* Default HitTestResult, where the target is unknown
*/
public static final int UNKNOWN_TYPE = 0;
/**
* HitTestResult for hitting a HTML::a tag
*/
public static final int ANCHOR_TYPE = 1;
/**
* HitTestResult for hitting a phone number
*/
public static final int PHONE_TYPE = 2;
/**
* HitTestResult for hitting a map address
*/
public static final int GEO_TYPE = 3;
/**
* HitTestResult for hitting an email address
*/
public static final int EMAIL_TYPE = 4;
/**
* HitTestResult for hitting an HTML::img tag
*/
public static final int IMAGE_TYPE = 5;
/**
* HitTestResult for hitting a HTML::a tag which contains HTML::img
*/
public static final int IMAGE_ANCHOR_TYPE = 6;
/**
* HitTestResult for hitting a HTML::a tag with src=http
*/
public static final int SRC_ANCHOR_TYPE = 7;
/**
* HitTestResult for hitting a HTML::a tag with src=http + HTML::img
*/
public static final int SRC_IMAGE_ANCHOR_TYPE = 8;
/**
* HitTestResult for hitting an edit text area
*/
public static final int EDIT_TEXT_TYPE = 9;
private int mType;
private String mExtra;
HitTestResult() {
mType = UNKNOWN_TYPE;
}
private void setType(int type) {
mType = type;
}
private void setExtra(String extra) {
mExtra = extra;
}
public int getType() {
return mType;
}
public String getExtra() {
return mExtra;
}
}
// The View containing the zoom controls
private ExtendedZoomControls mZoomControls;
private Runnable mZoomControlRunnable;
private ZoomButtonsController mZoomButtonsController;
// These keep track of the center point of the zoom. They are used to
// determine the point around which we should zoom.
private float mZoomCenterX;
private float mZoomCenterY;
private ZoomButtonsController.OnZoomListener mZoomListener =
new ZoomButtonsController.OnZoomListener() {
public void onVisibilityChanged(boolean visible) {
if (visible) {
switchOutDrawHistory();
updateZoomButtonsEnabled();
}
}
public void onZoom(boolean zoomIn) {
if (zoomIn) {
zoomIn();
} else {
zoomOut();
}
updateZoomButtonsEnabled();
}
};
/**
* Construct a new WebView with a Context object.
* @param context A Context object used to access application assets.
*/
public WebView(Context context) {
this(context, null);
}
/**
* Construct a new WebView with layout parameters.
* @param context A Context object used to access application assets.
* @param attrs An AttributeSet passed to our parent.
*/
public WebView(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.webViewStyle);
}
/**
* Construct a new WebView with layout parameters and a default style.
* @param context A Context object used to access application assets.
* @param attrs An AttributeSet passed to our parent.
* @param defStyle The default style resource ID.
*/
public WebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
mCallbackProxy = new CallbackProxy(context, this);
mWebViewCore = new WebViewCore(context, this, mCallbackProxy);
mDatabase = WebViewDatabase.getInstance(context);
mScroller = new Scroller(context);
mViewManager = new ViewManager(this);
mZoomButtonsController = new ZoomButtonsController(this);
mZoomButtonsController.setOnZoomListener(mZoomListener);
// ZoomButtonsController positions the buttons at the bottom, but in
// the middle. Change their layout parameters so they appear on the
// right.
View controls = mZoomButtonsController.getZoomControls();
ViewGroup.LayoutParams params = controls.getLayoutParams();
if (params instanceof FrameLayout.LayoutParams) {
FrameLayout.LayoutParams frameParams = (FrameLayout.LayoutParams)
params;
frameParams.gravity = Gravity.RIGHT;
}
}
private void updateZoomButtonsEnabled() {
boolean canZoomIn = mActualScale < mMaxZoomScale;
boolean canZoomOut = mActualScale > mMinZoomScale && !mInZoomOverview;
if (!canZoomIn && !canZoomOut) {
// Hide the zoom in and out buttons, as well as the fit to page
// button, if the page cannot zoom
mZoomButtonsController.getZoomControls().setVisibility(View.GONE);
} else {
// Bring back the hidden zoom controls.
mZoomButtonsController.getZoomControls()
.setVisibility(View.VISIBLE);
// Set each one individually, as a page may be able to zoom in
// or out.
mZoomButtonsController.setZoomInEnabled(canZoomIn);
mZoomButtonsController.setZoomOutEnabled(canZoomOut);
}
}
private void init() {
setWillNotDraw(false);
setFocusable(true);
setFocusableInTouchMode(true);
setClickable(true);
setLongClickable(true);
final ViewConfiguration configuration = ViewConfiguration.get(getContext());
int slop = configuration.getScaledTouchSlop();
mTouchSlopSquare = slop * slop;
mMinLockSnapReverseDistance = slop;
slop = configuration.getScaledDoubleTapSlop();
mDoubleTapSlopSquare = slop * slop;
final float density = getContext().getResources().getDisplayMetrics().density;
// use one line height, 16 based on our current default font, for how
// far we allow a touch be away from the edge of a link
mNavSlop = (int) (16 * density);
// density adjusted scale factors
DEFAULT_SCALE_PERCENT = (int) (100 * density);
mDefaultScale = density;
mActualScale = density;
mInvActualScale = 1 / density;
DEFAULT_MAX_ZOOM_SCALE = 4.0f * density;
DEFAULT_MIN_ZOOM_SCALE = 0.25f * density;
mMaxZoomScale = DEFAULT_MAX_ZOOM_SCALE;
mMinZoomScale = DEFAULT_MIN_ZOOM_SCALE;
mMaximumFling = configuration.getScaledMaximumFlingVelocity();
}
/* package */void updateDefaultZoomDensity(int zoomDensity) {
final float density = getContext().getResources().getDisplayMetrics().density
* 100 / zoomDensity;
if (Math.abs(density - mDefaultScale) > 0.01) {
float scaleFactor = density / mDefaultScale;
// adjust the limits
mNavSlop = (int) (16 * density);
DEFAULT_SCALE_PERCENT = (int) (100 * density);
DEFAULT_MAX_ZOOM_SCALE = 4.0f * density;
DEFAULT_MIN_ZOOM_SCALE = 0.25f * density;
mDefaultScale = density;
mMaxZoomScale *= scaleFactor;
mMinZoomScale *= scaleFactor;
setNewZoomScale(mActualScale * scaleFactor, false);
}
}
/* package */ boolean onSavePassword(String schemePlusHost, String username,
String password, final Message resumeMsg) {
boolean rVal = false;
if (resumeMsg == null) {
// null resumeMsg implies saving password silently
mDatabase.setUsernamePassword(schemePlusHost, username, password);
} else {
final Message remember = mPrivateHandler.obtainMessage(
REMEMBER_PASSWORD);
remember.getData().putString("host", schemePlusHost);
remember.getData().putString("username", username);
remember.getData().putString("password", password);
remember.obj = resumeMsg;
final Message neverRemember = mPrivateHandler.obtainMessage(
NEVER_REMEMBER_PASSWORD);
neverRemember.getData().putString("host", schemePlusHost);
neverRemember.getData().putString("username", username);
neverRemember.getData().putString("password", password);
neverRemember.obj = resumeMsg;
new AlertDialog.Builder(getContext())
.setTitle(com.android.internal.R.string.save_password_label)
.setMessage(com.android.internal.R.string.save_password_message)
.setPositiveButton(com.android.internal.R.string.save_password_notnow,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
resumeMsg.sendToTarget();
}
})
.setNeutralButton(com.android.internal.R.string.save_password_remember,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
remember.sendToTarget();
}
})
.setNegativeButton(com.android.internal.R.string.save_password_never,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
neverRemember.sendToTarget();
}
})
.setOnCancelListener(new OnCancelListener() {
public void onCancel(DialogInterface dialog) {
resumeMsg.sendToTarget();
}
}).show();
// Return true so that WebViewCore will pause while the dialog is
// up.
rVal = true;
}
return rVal;
}
@Override
public void setScrollBarStyle(int style) {
if (style == View.SCROLLBARS_INSIDE_INSET
|| style == View.SCROLLBARS_OUTSIDE_INSET) {
mOverlayHorizontalScrollbar = mOverlayVerticalScrollbar = false;
} else {
mOverlayHorizontalScrollbar = mOverlayVerticalScrollbar = true;
}
super.setScrollBarStyle(style);
}
/**
* Specify whether the horizontal scrollbar has overlay style.
* @param overlay TRUE if horizontal scrollbar should have overlay style.
*/
public void setHorizontalScrollbarOverlay(boolean overlay) {
mOverlayHorizontalScrollbar = overlay;
}
/**
* Specify whether the vertical scrollbar has overlay style.
* @param overlay TRUE if vertical scrollbar should have overlay style.
*/
public void setVerticalScrollbarOverlay(boolean overlay) {
mOverlayVerticalScrollbar = overlay;
}
/**
* Return whether horizontal scrollbar has overlay style
* @return TRUE if horizontal scrollbar has overlay style.
*/
public boolean overlayHorizontalScrollbar() {
return mOverlayHorizontalScrollbar;
}
/**
* Return whether vertical scrollbar has overlay style
* @return TRUE if vertical scrollbar has overlay style.
*/
public boolean overlayVerticalScrollbar() {
return mOverlayVerticalScrollbar;
}
/*
* Return the width of the view where the content of WebView should render
* to.
*/
private int getViewWidth() {
if (!isVerticalScrollBarEnabled() || mOverlayVerticalScrollbar) {
return getWidth();
} else {
return getWidth() - getVerticalScrollbarWidth();
}
}
/*
* Return the height of the view where the content of WebView should render
* to.
*/
private int getViewHeight() {
if (!isHorizontalScrollBarEnabled() || mOverlayHorizontalScrollbar) {
return getHeight();
} else {
return getHeight() - getHorizontalScrollbarHeight();
}
}
/**
* @return The SSL certificate for the main top-level page or null if
* there is no certificate (the site is not secure).
*/
public SslCertificate getCertificate() {
return mCertificate;
}
/**
* Sets the SSL certificate for the main top-level page.
*/
public void setCertificate(SslCertificate certificate) {
// here, the certificate can be null (if the site is not secure)
mCertificate = certificate;
}
//-------------------------------------------------------------------------
// Methods called by activity
//-------------------------------------------------------------------------
/**
* Save the username and password for a particular host in the WebView's
* internal database.
* @param host The host that required the credentials.
* @param username The username for the given host.
* @param password The password for the given host.
*/
public void savePassword(String host, String username, String password) {
mDatabase.setUsernamePassword(host, username, password);
}
/**
* Set the HTTP authentication credentials for a given host and realm.
*
* @param host The host for the credentials.
* @param realm The realm for the credentials.
* @param username The username for the password. If it is null, it means
* password can't be saved.
* @param password The password
*/
public void setHttpAuthUsernamePassword(String host, String realm,
String username, String password) {
mDatabase.setHttpAuthUsernamePassword(host, realm, username, password);
}
/**
* Retrieve the HTTP authentication username and password for a given
* host & realm pair
*
* @param host The host for which the credentials apply.
* @param realm The realm for which the credentials apply.
* @return String[] if found, String[0] is username, which can be null and
* String[1] is password. Return null if it can't find anything.
*/
public String[] getHttpAuthUsernamePassword(String host, String realm) {
return mDatabase.getHttpAuthUsernamePassword(host, realm);
}
/**
* Destroy the internal state of the WebView. This method should be called
* after the WebView has been removed from the view system. No other
* methods may be called on a WebView after destroy.
*/
public void destroy() {
clearTextEntry();
if (mWebViewCore != null) {
// Set the handlers to null before destroying WebViewCore so no
// more messages will be posted.
mCallbackProxy.setWebViewClient(null);
mCallbackProxy.setWebChromeClient(null);
// Tell WebViewCore to destroy itself
WebViewCore webViewCore = mWebViewCore;
mWebViewCore = null; // prevent using partial webViewCore
webViewCore.destroy();
// Remove any pending messages that might not be serviced yet.
mPrivateHandler.removeCallbacksAndMessages(null);
mCallbackProxy.removeCallbacksAndMessages(null);
// Wake up the WebCore thread just in case it is waiting for a
// javascript dialog.
synchronized (mCallbackProxy) {
mCallbackProxy.notify();
}
}
if (mNativeClass != 0) {
nativeDestroy();
mNativeClass = 0;
}
}
/**
* Enables platform notifications of data state and proxy changes.
*/
public static void enablePlatformNotifications() {
Network.enablePlatformNotifications();
}
/**
* If platform notifications are enabled, this should be called
* from the Activity's onPause() or onStop().
*/
public static void disablePlatformNotifications() {
Network.disablePlatformNotifications();
}
/**
* Sets JavaScript engine flags.
*
* @param flags JS engine flags in a String
*
* @hide pending API solidification
*/
public void setJsFlags(String flags) {
mWebViewCore.sendMessage(EventHub.SET_JS_FLAGS, flags);
}
/**
* Inform WebView of the network state. This is used to set
* the javascript property window.navigator.isOnline and
* generates the online/offline event as specified in HTML5, sec. 5.7.7
* @param networkUp boolean indicating if network is available
*/
public void setNetworkAvailable(boolean networkUp) {
mWebViewCore.sendMessage(EventHub.SET_NETWORK_STATE,
networkUp ? 1 : 0, 0);
}
/**
* Save the state of this WebView used in
* {@link android.app.Activity#onSaveInstanceState}. Please note that this
* method no longer stores the display data for this WebView. The previous
* behavior could potentially leak files if {@link #restoreState} was never
* called. See {@link #savePicture} and {@link #restorePicture} for saving
* and restoring the display data.
* @param outState The Bundle to store the WebView state.
* @return The same copy of the back/forward list used to save the state. If
* saveState fails, the returned list will be null.
* @see #savePicture
* @see #restorePicture
*/
public WebBackForwardList saveState(Bundle outState) {
if (outState == null) {
return null;
}
// We grab a copy of the back/forward list because a client of WebView
// may have invalidated the history list by calling clearHistory.
WebBackForwardList list = copyBackForwardList();
final int currentIndex = list.getCurrentIndex();
final int size = list.getSize();
// We should fail saving the state if the list is empty or the index is
// not in a valid range.
if (currentIndex < 0 || currentIndex >= size || size == 0) {
return null;
}
outState.putInt("index", currentIndex);
// FIXME: This should just be a byte[][] instead of ArrayList but
// Parcel.java does not have the code to handle multi-dimensional
// arrays.
ArrayList<byte[]> history = new ArrayList<byte[]>(size);
for (int i = 0; i < size; i++) {
WebHistoryItem item = list.getItemAtIndex(i);
byte[] data = item.getFlattenedData();
if (data == null) {
// It would be very odd to not have any data for a given history
// item. And we will fail to rebuild the history list without
// flattened data.
return null;
}
history.add(data);
}
outState.putSerializable("history", history);
if (mCertificate != null) {
outState.putBundle("certificate",
SslCertificate.saveState(mCertificate));
}
return list;
}
/**
* Save the current display data to the Bundle given. Used in conjunction
* with {@link #saveState}.
* @param b A Bundle to store the display data.
* @param dest The file to store the serialized picture data. Will be
* overwritten with this WebView's picture data.
* @return True if the picture was successfully saved.
*/
public boolean savePicture(Bundle b, File dest) {
if (dest == null || b == null) {
return false;
}
final Picture p = capturePicture();
try {
final FileOutputStream out = new FileOutputStream(dest);
p.writeToStream(out);
out.close();
} catch (FileNotFoundException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (RuntimeException e) {
e.printStackTrace();
}
if (dest.length() > 0) {
b.putInt("scrollX", mScrollX);
b.putInt("scrollY", mScrollY);
b.putFloat("scale", mActualScale);
if (mInZoomOverview) {
b.putFloat("lastScale", mLastScale);
}
return true;
}
return false;
}
/**
* Restore the display data that was save in {@link #savePicture}. Used in
* conjunction with {@link #restoreState}.
* @param b A Bundle containing the saved display data.
* @param src The file where the picture data was stored.
* @return True if the picture was successfully restored.
*/
public boolean restorePicture(Bundle b, File src) {
if (src == null || b == null) {
return false;
}
if (src.exists()) {
Picture p = null;
try {
final FileInputStream in = new FileInputStream(src);
p = Picture.createFromStream(in);
in.close();
} catch (FileNotFoundException e){
e.printStackTrace();
} catch (RuntimeException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (p != null) {
int sx = b.getInt("scrollX", 0);
int sy = b.getInt("scrollY", 0);
float scale = b.getFloat("scale", 1.0f);
mDrawHistory = true;
mHistoryPicture = p;
mScrollX = sx;
mScrollY = sy;
mHistoryWidth = Math.round(p.getWidth() * scale);
mHistoryHeight = Math.round(p.getHeight() * scale);
// as getWidth() / getHeight() of the view are not
// available yet, set up mActualScale, so that when
// onSizeChanged() is called, the rest will be set
// correctly
mActualScale = scale;
float lastScale = b.getFloat("lastScale", -1.0f);
if (lastScale > 0) {
mInZoomOverview = true;
mLastScale = lastScale;
} else {
mInZoomOverview = false;
}
invalidate();
return true;
}
}
return false;
}
/**
* Restore the state of this WebView from the given map used in
* {@link android.app.Activity#onRestoreInstanceState}. This method should
* be called to restore the state of the WebView before using the object. If
* it is called after the WebView has had a chance to build state (load
* pages, create a back/forward list, etc.) there may be undesirable
* side-effects. Please note that this method no longer restores the
* display data for this WebView. See {@link #savePicture} and {@link
* #restorePicture} for saving and restoring the display data.
* @param inState The incoming Bundle of state.
* @return The restored back/forward list or null if restoreState failed.
* @see #savePicture
* @see #restorePicture
*/
public WebBackForwardList restoreState(Bundle inState) {
WebBackForwardList returnList = null;
if (inState == null) {
return returnList;
}
if (inState.containsKey("index") && inState.containsKey("history")) {
mCertificate = SslCertificate.restoreState(
inState.getBundle("certificate"));
final WebBackForwardList list = mCallbackProxy.getBackForwardList();
final int index = inState.getInt("index");
// We can't use a clone of the list because we need to modify the
// shared copy, so synchronize instead to prevent concurrent
// modifications.
synchronized (list) {
final List<byte[]> history =
(List<byte[]>) inState.getSerializable("history");
final int size = history.size();
// Check the index bounds so we don't crash in native code while
// restoring the history index.
if (index < 0 || index >= size) {
return null;
}
for (int i = 0; i < size; i++) {
byte[] data = history.remove(0);
if (data == null) {
// If we somehow have null data, we cannot reconstruct
// the item and thus our history list cannot be rebuilt.
return null;
}
WebHistoryItem item = new WebHistoryItem(data);
list.addHistoryItem(item);
}
// Grab the most recent copy to return to the caller.
returnList = copyBackForwardList();
// Update the copy to have the correct index.
returnList.setCurrentIndex(index);
}
// Remove all pending messages because we are restoring previous
// state.
mWebViewCore.removeMessages();
// Send a restore state message.
mWebViewCore.sendMessage(EventHub.RESTORE_STATE, index);
}
return returnList;
}
/**
* Load the given url.
* @param url The url of the resource to load.
*/
public void loadUrl(String url) {
if (url == null) {
return;
}
switchOutDrawHistory();
mWebViewCore.sendMessage(EventHub.LOAD_URL, url);
clearTextEntry();
}
/**
* Load the url with postData using "POST" method into the WebView. If url
* is not a network url, it will be loaded with {link
* {@link #loadUrl(String)} instead.
*
* @param url The url of the resource to load.
* @param postData The data will be passed to "POST" request.
*/
public void postUrl(String url, byte[] postData) {
if (URLUtil.isNetworkUrl(url)) {
switchOutDrawHistory();
WebViewCore.PostUrlData arg = new WebViewCore.PostUrlData();
arg.mUrl = url;
arg.mPostData = postData;
mWebViewCore.sendMessage(EventHub.POST_URL, arg);
clearTextEntry();
} else {
loadUrl(url);
}
}
/**
* Load the given data into the WebView. This will load the data into
* WebView using the data: scheme. Content loaded through this mechanism
* does not have the ability to load content from the network.
* @param data A String of data in the given encoding.
* @param mimeType The MIMEType of the data. i.e. text/html, image/jpeg
* @param encoding The encoding of the data. i.e. utf-8, base64
*/
public void loadData(String data, String mimeType, String encoding) {
loadUrl("data:" + mimeType + ";" + encoding + "," + data);
}
/**
* Load the given data into the WebView, use the provided URL as the base
* URL for the content. The base URL is the URL that represents the page
* that is loaded through this interface. As such, it is used for the
* history entry and to resolve any relative URLs. The failUrl is used if
* browser fails to load the data provided. If it is empty or null, and the
* load fails, then no history entry is created.
* <p>
* Note for post 1.0. Due to the change in the WebKit, the access to asset
* files through "file:///android_asset/" for the sub resources is more
* restricted. If you provide null or empty string as baseUrl, you won't be
* able to access asset files. If the baseUrl is anything other than
* http(s)/ftp(s)/about/javascript as scheme, you can access asset files for
* sub resources.
*
* @param baseUrl Url to resolve relative paths with, if null defaults to
* "about:blank"
* @param data A String of data in the given encoding.
* @param mimeType The MIMEType of the data. i.e. text/html. If null,
* defaults to "text/html"
* @param encoding The encoding of the data. i.e. utf-8, us-ascii
* @param failUrl URL to use if the content fails to load or null.
*/
public void loadDataWithBaseURL(String baseUrl, String data,
String mimeType, String encoding, String failUrl) {
if (baseUrl != null && baseUrl.toLowerCase().startsWith("data:")) {
loadData(data, mimeType, encoding);
return;
}
switchOutDrawHistory();
WebViewCore.BaseUrlData arg = new WebViewCore.BaseUrlData();
arg.mBaseUrl = baseUrl;
arg.mData = data;
arg.mMimeType = mimeType;
arg.mEncoding = encoding;
arg.mFailUrl = failUrl;
mWebViewCore.sendMessage(EventHub.LOAD_DATA, arg);
clearTextEntry();
}
/**
* Stop the current load.
*/
public void stopLoading() {
// TODO: should we clear all the messages in the queue before sending
// STOP_LOADING?
switchOutDrawHistory();
mWebViewCore.sendMessage(EventHub.STOP_LOADING);
}
/**
* Reload the current url.
*/
public void reload() {
switchOutDrawHistory();
mWebViewCore.sendMessage(EventHub.RELOAD);
}
/**
* Return true if this WebView has a back history item.
* @return True iff this WebView has a back history item.
*/
public boolean canGoBack() {
WebBackForwardList l = mCallbackProxy.getBackForwardList();
synchronized (l) {
if (l.getClearPending()) {
return false;
} else {
return l.getCurrentIndex() > 0;
}
}
}
/**
* Go back in the history of this WebView.
*/
public void goBack() {
goBackOrForward(-1);
}
/**
* Return true if this WebView has a forward history item.
* @return True iff this Webview has a forward history item.
*/
public boolean canGoForward() {
WebBackForwardList l = mCallbackProxy.getBackForwardList();
synchronized (l) {
if (l.getClearPending()) {
return false;
} else {
return l.getCurrentIndex() < l.getSize() - 1;
}
}
}
/**
* Go forward in the history of this WebView.
*/
public void goForward() {
goBackOrForward(1);
}
/**
* Return true if the page can go back or forward the given
* number of steps.
* @param steps The negative or positive number of steps to move the
* history.
*/
public boolean canGoBackOrForward(int steps) {
WebBackForwardList l = mCallbackProxy.getBackForwardList();
synchronized (l) {
if (l.getClearPending()) {
return false;
} else {
int newIndex = l.getCurrentIndex() + steps;
return newIndex >= 0 && newIndex < l.getSize();
}
}
}
/**
* Go to the history item that is the number of steps away from
* the current item. Steps is negative if backward and positive
* if forward.
* @param steps The number of steps to take back or forward in the back
* forward list.
*/
public void goBackOrForward(int steps) {
goBackOrForward(steps, false);
}
private void goBackOrForward(int steps, boolean ignoreSnapshot) {
// every time we go back or forward, we want to reset the
// WebView certificate:
// if the new site is secure, we will reload it and get a
// new certificate set;
// if the new site is not secure, the certificate must be
// null, and that will be the case
mCertificate = null;
if (steps != 0) {
clearTextEntry();
mWebViewCore.sendMessage(EventHub.GO_BACK_FORWARD, steps,
ignoreSnapshot ? 1 : 0);
}
}
private boolean extendScroll(int y) {
int finalY = mScroller.getFinalY();
int newY = pinLocY(finalY + y);
if (newY == finalY) return false;
mScroller.setFinalY(newY);
mScroller.extendDuration(computeDuration(0, y));
return true;
}
/**
* Scroll the contents of the view up by half the view size
* @param top true to jump to the top of the page
* @return true if the page was scrolled
*/
public boolean pageUp(boolean top) {
if (mNativeClass == 0) {
return false;
}
nativeClearCursor(); // start next trackball movement from page edge
if (top) {
// go to the top of the document
return pinScrollTo(mScrollX, 0, true, 0);
}
// Page up
int h = getHeight();
int y;
if (h > 2 * PAGE_SCROLL_OVERLAP) {
y = -h + PAGE_SCROLL_OVERLAP;
} else {
y = -h / 2;
}
mUserScroll = true;
return mScroller.isFinished() ? pinScrollBy(0, y, true, 0)
: extendScroll(y);
}
/**
* Scroll the contents of the view down by half the page size
* @param bottom true to jump to bottom of page
* @return true if the page was scrolled
*/
public boolean pageDown(boolean bottom) {
if (mNativeClass == 0) {
return false;
}
nativeClearCursor(); // start next trackball movement from page edge
if (bottom) {
return pinScrollTo(mScrollX, mContentHeight, true, 0);
}
// Page down.
int h = getHeight();
int y;
if (h > 2 * PAGE_SCROLL_OVERLAP) {
y = h - PAGE_SCROLL_OVERLAP;
} else {
y = h / 2;
}
mUserScroll = true;
return mScroller.isFinished() ? pinScrollBy(0, y, true, 0)
: extendScroll(y);
}
/**
* Clear the view so that onDraw() will draw nothing but white background,
* and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY
*/
public void clearView() {
mContentWidth = 0;
mContentHeight = 0;
mWebViewCore.sendMessage(EventHub.CLEAR_CONTENT);
}
/**
* Return a new picture that captures the current display of the webview.
* This is a copy of the display, and will be unaffected if the webview
* later loads a different URL.
*
* @return a picture containing the current contents of the view. Note this
* picture is of the entire document, and is not restricted to the
* bounds of the view.
*/
public Picture capturePicture() {
if (null == mWebViewCore) return null; // check for out of memory tab
return mWebViewCore.copyContentPicture();
}
/**
* Return true if the browser is displaying a TextView for text input.
*/
private boolean inEditingMode() {
return mWebTextView != null && mWebTextView.getParent() != null
&& mWebTextView.hasFocus();
}
private void clearTextEntry() {
if (inEditingMode()) {
mWebTextView.remove();
}
}
/**
* Return the current scale of the WebView
* @return The current scale.
*/
public float getScale() {
return mActualScale;
}
/**
* Set the initial scale for the WebView. 0 means default. If
* {@link WebSettings#getUseWideViewPort()} is true, it zooms out all the
* way. Otherwise it starts with 100%. If initial scale is greater than 0,
* WebView starts will this value as initial scale.
*
* @param scaleInPercent The initial scale in percent.
*/
public void setInitialScale(int scaleInPercent) {
mInitialScale = scaleInPercent;
}
/**
* Invoke the graphical zoom picker widget for this WebView. This will
* result in the zoom widget appearing on the screen to control the zoom
* level of this WebView.
*/
public void invokeZoomPicker() {
if (!getSettings().supportZoom()) {
Log.w(LOGTAG, "This WebView doesn't support zoom.");
return;
}
clearTextEntry();
if (getSettings().getBuiltInZoomControls()) {
mZoomButtonsController.setVisible(true);
} else {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
}
}
/**
* Return a HitTestResult based on the current cursor node. If a HTML::a tag
* is found and the anchor has a non-javascript url, the HitTestResult type
* is set to SRC_ANCHOR_TYPE and the url is set in the "extra" field. If the
* anchor does not have a url or if it is a javascript url, the type will
* be UNKNOWN_TYPE and the url has to be retrieved through
* {@link #requestFocusNodeHref} asynchronously. If a HTML::img tag is
* found, the HitTestResult type is set to IMAGE_TYPE and the url is set in
* the "extra" field. A type of
* SRC_IMAGE_ANCHOR_TYPE indicates an anchor with a url that has an image as
* a child node. If a phone number is found, the HitTestResult type is set
* to PHONE_TYPE and the phone number is set in the "extra" field of
* HitTestResult. If a map address is found, the HitTestResult type is set
* to GEO_TYPE and the address is set in the "extra" field of HitTestResult.
* If an email address is found, the HitTestResult type is set to EMAIL_TYPE
* and the email is set in the "extra" field of HitTestResult. Otherwise,
* HitTestResult type is set to UNKNOWN_TYPE.
*/
public HitTestResult getHitTestResult() {
if (mNativeClass == 0) {
return null;
}
HitTestResult result = new HitTestResult();
if (nativeHasCursorNode()) {
if (nativeCursorIsTextInput()) {
result.setType(HitTestResult.EDIT_TEXT_TYPE);
} else {
String text = nativeCursorText();
if (text != null) {
if (text.startsWith(SCHEME_TEL)) {
result.setType(HitTestResult.PHONE_TYPE);
result.setExtra(text.substring(SCHEME_TEL.length()));
} else if (text.startsWith(SCHEME_MAILTO)) {
result.setType(HitTestResult.EMAIL_TYPE);
result.setExtra(text.substring(SCHEME_MAILTO.length()));
} else if (text.startsWith(SCHEME_GEO)) {
result.setType(HitTestResult.GEO_TYPE);
result.setExtra(URLDecoder.decode(text
.substring(SCHEME_GEO.length())));
} else if (nativeCursorIsAnchor()) {
result.setType(HitTestResult.SRC_ANCHOR_TYPE);
result.setExtra(text);
}
}
}
}
int type = result.getType();
if (type == HitTestResult.UNKNOWN_TYPE
|| type == HitTestResult.SRC_ANCHOR_TYPE) {
// Now check to see if it is an image.
int contentX = viewToContent((int) mLastTouchX + mScrollX);
int contentY = viewToContent((int) mLastTouchY + mScrollY);
String text = nativeImageURI(contentX, contentY);
if (text != null) {
result.setType(type == HitTestResult.UNKNOWN_TYPE ?
HitTestResult.IMAGE_TYPE :
HitTestResult.SRC_IMAGE_ANCHOR_TYPE);
result.setExtra(text);
}
}
return result;
}
/**
* Request the href of an anchor element due to getFocusNodePath returning
* "href." If hrefMsg is null, this method returns immediately and does not
* dispatch hrefMsg to its target.
*
* @param hrefMsg This message will be dispatched with the result of the
* request as the data member with "url" as key. The result can
* be null.
*/
// FIXME: API change required to change the name of this function. We now
// look at the cursor node, and not the focus node. Also, what is
// getFocusNodePath?
public void requestFocusNodeHref(Message hrefMsg) {
if (hrefMsg == null || mNativeClass == 0) {
return;
}
if (nativeCursorIsAnchor()) {
mWebViewCore.sendMessage(EventHub.REQUEST_CURSOR_HREF,
nativeCursorFramePointer(), nativeCursorNodePointer(),
hrefMsg);
}
}
/**
* Request the url of the image last touched by the user. msg will be sent
* to its target with a String representing the url as its object.
*
* @param msg This message will be dispatched with the result of the request
* as the data member with "url" as key. The result can be null.
*/
public void requestImageRef(Message msg) {
int contentX = viewToContent((int) mLastTouchX + mScrollX);
int contentY = viewToContent((int) mLastTouchY + mScrollY);
String ref = nativeImageURI(contentX, contentY);
Bundle data = msg.getData();
data.putString("url", ref);
msg.setData(data);
msg.sendToTarget();
}
private static int pinLoc(int x, int viewMax, int docMax) {
// Log.d(LOGTAG, "-- pinLoc " + x + " " + viewMax + " " + docMax);
if (docMax < viewMax) { // the doc has room on the sides for "blank"
// pin the short document to the top/left of the screen
x = 0;
// Log.d(LOGTAG, "--- center " + x);
} else if (x < 0) {
x = 0;
// Log.d(LOGTAG, "--- zero");
} else if (x + viewMax > docMax) {
x = docMax - viewMax;
// Log.d(LOGTAG, "--- pin " + x);
}
return x;
}
// Expects x in view coordinates
private int pinLocX(int x) {
return pinLoc(x, getViewWidth(), computeHorizontalScrollRange());
}
// Expects y in view coordinates
private int pinLocY(int y) {
return pinLoc(y, getViewHeight(), computeVerticalScrollRange());
}
/*package*/ int viewToContent(int x) {
return Math.round(x * mInvActualScale);
}
/*package*/ int contentToView(int x) {
return Math.round(x * mActualScale);
}
// Called by JNI to invalidate the View, given rectangle coordinates in
// content space
private void viewInvalidate(int l, int t, int r, int b) {
invalidate(contentToView(l), contentToView(t), contentToView(r),
contentToView(b));
}
// Called by JNI to invalidate the View after a delay, given rectangle
// coordinates in content space
private void viewInvalidateDelayed(long delay, int l, int t, int r, int b) {
postInvalidateDelayed(delay, contentToView(l), contentToView(t),
contentToView(r), contentToView(b));
}
private Rect contentToView(Rect x) {
return new Rect(contentToView(x.left), contentToView(x.top)
, contentToView(x.right), contentToView(x.bottom));
}
/* call from webcoreview.draw(), so we're still executing in the UI thread
*/
private void recordNewContentSize(int w, int h, boolean updateLayout) {
// premature data from webkit, ignore
if ((w | h) == 0) {
return;
}
// don't abort a scroll animation if we didn't change anything
if (mContentWidth != w || mContentHeight != h) {
// record new dimensions
mContentWidth = w;
mContentHeight = h;
// If history Picture is drawn, don't update scroll. They will be
// updated when we get out of that mode.
if (!mDrawHistory) {
// repin our scroll, taking into account the new content size
int oldX = mScrollX;
int oldY = mScrollY;
mScrollX = pinLocX(mScrollX);
mScrollY = pinLocY(mScrollY);
// android.util.Log.d("skia", "recordNewContentSize -
// abortAnimation");
mScroller.abortAnimation(); // just in case
if (oldX != mScrollX || oldY != mScrollY) {
sendOurVisibleRect();
}
}
}
contentSizeChanged(updateLayout);
}
private void setNewZoomScale(float scale, boolean force) {
if (scale < mMinZoomScale) {
scale = mMinZoomScale;
} else if (scale > mMaxZoomScale) {
scale = mMaxZoomScale;
}
if (scale != mActualScale || force) {
if (mDrawHistory) {
// If history Picture is drawn, don't update scroll. They will
// be updated when we get out of that mode.
if (scale != mActualScale && !mPreviewZoomOnly) {
mCallbackProxy.onScaleChanged(mActualScale, scale);
}
mActualScale = scale;
mInvActualScale = 1 / scale;
if (!mPreviewZoomOnly) {
sendViewSizeZoom();
}
} else {
// update our scroll so we don't appear to jump
// i.e. keep the center of the doc in the center of the view
int oldX = mScrollX;
int oldY = mScrollY;
float ratio = scale * mInvActualScale; // old inverse
float sx = ratio * oldX + (ratio - 1) * mZoomCenterX;
float sy = ratio * oldY + (ratio - 1) * mZoomCenterY;
// now update our new scale and inverse
if (scale != mActualScale && !mPreviewZoomOnly) {
mCallbackProxy.onScaleChanged(mActualScale, scale);
}
mActualScale = scale;
mInvActualScale = 1 / scale;
// Scale all the child views
mViewManager.scaleAll();
// as we don't have animation for scaling, don't do animation
// for scrolling, as it causes weird intermediate state
// pinScrollTo(Math.round(sx), Math.round(sy));
mScrollX = pinLocX(Math.round(sx));
mScrollY = pinLocY(Math.round(sy));
if (!mPreviewZoomOnly) {
sendViewSizeZoom();
sendOurVisibleRect();
}
}
}
}
// Used to avoid sending many visible rect messages.
private Rect mLastVisibleRectSent;
private Rect mLastGlobalRect;
private Rect sendOurVisibleRect() {
Rect rect = new Rect();
calcOurContentVisibleRect(rect);
// Rect.equals() checks for null input.
if (!rect.equals(mLastVisibleRectSent)) {
Point pos = new Point(rect.left, rect.top);
mWebViewCore.sendMessage(EventHub.SET_SCROLL_OFFSET,
nativeMoveGeneration(), 0, pos);
mLastVisibleRectSent = rect;
}
Rect globalRect = new Rect();
if (getGlobalVisibleRect(globalRect)
&& !globalRect.equals(mLastGlobalRect)) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "sendOurVisibleRect=(" + globalRect.left + ","
+ globalRect.top + ",r=" + globalRect.right + ",b="
+ globalRect.bottom);
}
// TODO: the global offset is only used by windowRect()
// in ChromeClientAndroid ; other clients such as touch
// and mouse events could return view + screen relative points.
mWebViewCore.sendMessage(EventHub.SET_GLOBAL_BOUNDS, globalRect);
mLastGlobalRect = globalRect;
}
return rect;
}
// Sets r to be the visible rectangle of our webview in view coordinates
private void calcOurVisibleRect(Rect r) {
Point p = new Point();
getGlobalVisibleRect(r, p);
r.offset(-p.x, -p.y);
if (mFindIsUp) {
r.bottom -= FIND_HEIGHT;
}
}
// Sets r to be our visible rectangle in content coordinates
private void calcOurContentVisibleRect(Rect r) {
calcOurVisibleRect(r);
r.left = viewToContent(r.left);
r.top = viewToContent(r.top);
r.right = viewToContent(r.right);
r.bottom = viewToContent(r.bottom);
}
static class ViewSizeData {
int mWidth;
int mHeight;
int mTextWrapWidth;
float mScale;
}
/**
* Compute unzoomed width and height, and if they differ from the last
* values we sent, send them to webkit (to be used has new viewport)
*
* @return true if new values were sent
*/
private boolean sendViewSizeZoom() {
int viewWidth = getViewWidth();
int newWidth = Math.round(viewWidth * mInvActualScale);
int newHeight = Math.round(getViewHeight() * mInvActualScale);
/*
* Because the native side may have already done a layout before the
* View system was able to measure us, we have to send a height of 0 to
* remove excess whitespace when we grow our width. This will trigger a
* layout and a change in content size. This content size change will
* mean that contentSizeChanged will either call this method directly or
* indirectly from onSizeChanged.
*/
if (newWidth > mLastWidthSent && mWrapContent) {
newHeight = 0;
}
// Avoid sending another message if the dimensions have not changed.
if (newWidth != mLastWidthSent || newHeight != mLastHeightSent) {
ViewSizeData data = new ViewSizeData();
data.mWidth = newWidth;
data.mHeight = newHeight;
// while in zoom overview mode, the text are wrapped to the screen
// width matching mLastScale. So that we don't trigger re-flow while
// toggling between overview mode and normal mode.
data.mTextWrapWidth = mInZoomOverview ? Math.round(viewWidth
/ mLastScale) : newWidth;
data.mScale = mActualScale;
mWebViewCore.sendMessage(EventHub.VIEW_SIZE_CHANGED, data);
mLastWidthSent = newWidth;
mLastHeightSent = newHeight;
return true;
}
return false;
}
@Override
protected int computeHorizontalScrollRange() {
if (mDrawHistory) {
return mHistoryWidth;
} else {
return contentToView(mContentWidth);
}
}
// Make sure this stays in sync with the actual height of the FindDialog.
private static final int FIND_HEIGHT = 79;
@Override
protected int computeVerticalScrollRange() {
if (mDrawHistory) {
return mHistoryHeight;
} else {
int height = contentToView(mContentHeight);
if (mFindIsUp) {
height += FIND_HEIGHT;
}
return height;
}
}
/**
* Get the url for the current page. This is not always the same as the url
* passed to WebViewClient.onPageStarted because although the load for
* that url has begun, the current page may not have changed.
* @return The url for the current page.
*/
public String getUrl() {
WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem();
return h != null ? h.getUrl() : null;
}
/**
* Get the original url for the current page. This is not always the same
* as the url passed to WebViewClient.onPageStarted because although the
* load for that url has begun, the current page may not have changed.
* Also, there may have been redirects resulting in a different url to that
* originally requested.
* @return The url that was originally requested for the current page.
*/
public String getOriginalUrl() {
WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem();
return h != null ? h.getOriginalUrl() : null;
}
/**
* Get the title for the current page. This is the title of the current page
* until WebViewClient.onReceivedTitle is called.
* @return The title for the current page.
*/
public String getTitle() {
WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem();
return h != null ? h.getTitle() : null;
}
/**
* Get the favicon for the current page. This is the favicon of the current
* page until WebViewClient.onReceivedIcon is called.
* @return The favicon for the current page.
*/
public Bitmap getFavicon() {
WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem();
return h != null ? h.getFavicon() : null;
}
/**
* Get the touch icon url for the apple-touch-icon <link> element.
* @hide
*/
public String getTouchIconUrl() {
WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem();
return h != null ? h.getTouchIconUrl() : null;
}
/**
* Get the progress for the current page.
* @return The progress for the current page between 0 and 100.
*/
public int getProgress() {
return mCallbackProxy.getProgress();
}
/**
* @return the height of the HTML content.
*/
public int getContentHeight() {
return mContentHeight;
}
/**
* Pause all layout, parsing, and javascript timers for all webviews. This
* is a global requests, not restricted to just this webview. This can be
* useful if the application has been paused.
*/
public void pauseTimers() {
mWebViewCore.sendMessage(EventHub.PAUSE_TIMERS);
}
/**
* Resume all layout, parsing, and javascript timers for all webviews.
* This will resume dispatching all timers.
*/
public void resumeTimers() {
mWebViewCore.sendMessage(EventHub.RESUME_TIMERS);
}
/**
* Call this to pause any extra processing associated with this view and
* its associated DOM/plugins/javascript/etc. For example, if the view is
* taken offscreen, this could be called to reduce unnecessary CPU and/or
* network traffic. When the view is again "active", call onResume().
*
* Note that this differs from pauseTimers(), which affects all views/DOMs
* @hide
*/
public void onPause() {
if (!mIsPaused) {
mIsPaused = true;
mWebViewCore.sendMessage(EventHub.ON_PAUSE);
}
}
/**
* Call this to balanace a previous call to onPause()
* @hide
*/
public void onResume() {
if (mIsPaused) {
mIsPaused = false;
mWebViewCore.sendMessage(EventHub.ON_RESUME);
}
}
/**
* Returns true if the view is paused, meaning onPause() was called. Calling
* onResume() sets the paused state back to false.
* @hide
*/
public boolean isPaused() {
return mIsPaused;
}
/**
* Call this to inform the view that memory is low so that it can
* free any available memory.
* @hide
*/
public void freeMemory() {
mWebViewCore.sendMessage(EventHub.FREE_MEMORY);
}
/**
* Clear the resource cache. Note that the cache is per-application, so
* this will clear the cache for all WebViews used.
*
* @param includeDiskFiles If false, only the RAM cache is cleared.
*/
public void clearCache(boolean includeDiskFiles) {
// Note: this really needs to be a static method as it clears cache for all
// WebView. But we need mWebViewCore to send message to WebCore thread, so
// we can't make this static.
mWebViewCore.sendMessage(EventHub.CLEAR_CACHE,
includeDiskFiles ? 1 : 0, 0);
}
/**
* Make sure that clearing the form data removes the adapter from the
* currently focused textfield if there is one.
*/
public void clearFormData() {
if (inEditingMode()) {
AutoCompleteAdapter adapter = null;
mWebTextView.setAdapterCustom(adapter);
}
}
/**
* Tell the WebView to clear its internal back/forward list.
*/
public void clearHistory() {
mCallbackProxy.getBackForwardList().setClearPending();
mWebViewCore.sendMessage(EventHub.CLEAR_HISTORY);
}
/**
* Clear the SSL preferences table stored in response to proceeding with SSL
* certificate errors.
*/
public void clearSslPreferences() {
mWebViewCore.sendMessage(EventHub.CLEAR_SSL_PREF_TABLE);
}
/**
* Return the WebBackForwardList for this WebView. This contains the
* back/forward list for use in querying each item in the history stack.
* This is a copy of the private WebBackForwardList so it contains only a
* snapshot of the current state. Multiple calls to this method may return
* different objects. The object returned from this method will not be
* updated to reflect any new state.
*/
public WebBackForwardList copyBackForwardList() {
return mCallbackProxy.getBackForwardList().clone();
}
/*
* Highlight and scroll to the next occurance of String in findAll.
* Wraps the page infinitely, and scrolls. Must be called after
* calling findAll.
*
* @param forward Direction to search.
*/
public void findNext(boolean forward) {
nativeFindNext(forward);
}
/*
* Find all instances of find on the page and highlight them.
* @param find String to find.
* @return int The number of occurances of the String "find"
* that were found.
*/
public int findAll(String find) {
mFindIsUp = true;
int result = nativeFindAll(find.toLowerCase(), find.toUpperCase());
invalidate();
return result;
}
// Used to know whether the find dialog is open. Affects whether
// or not we draw the highlights for matches.
private boolean mFindIsUp;
/**
* Return the first substring consisting of the address of a physical
* location. Currently, only addresses in the United States are detected,
* and consist of:
* - a house number
* - a street name
* - a street type (Road, Circle, etc), either spelled out or abbreviated
* - a city name
* - a state or territory, either spelled out or two-letter abbr.
* - an optional 5 digit or 9 digit zip code.
*
* All names must be correctly capitalized, and the zip code, if present,
* must be valid for the state. The street type must be a standard USPS
* spelling or abbreviation. The state or territory must also be spelled
* or abbreviated using USPS standards. The house number may not exceed
* five digits.
* @param addr The string to search for addresses.
*
* @return the address, or if no address is found, return null.
*/
public static String findAddress(String addr) {
return findAddress(addr, false);
}
/**
* @hide
* Return the first substring consisting of the address of a physical
* location. Currently, only addresses in the United States are detected,
* and consist of:
* - a house number
* - a street name
* - a street type (Road, Circle, etc), either spelled out or abbreviated
* - a city name
* - a state or territory, either spelled out or two-letter abbr.
* - an optional 5 digit or 9 digit zip code.
*
* Names are optionally capitalized, and the zip code, if present,
* must be valid for the state. The street type must be a standard USPS
* spelling or abbreviation. The state or territory must also be spelled
* or abbreviated using USPS standards. The house number may not exceed
* five digits.
* @param addr The string to search for addresses.
* @param caseInsensitive addr Set to true to make search ignore case.
*
* @return the address, or if no address is found, return null.
*/
public static String findAddress(String addr, boolean caseInsensitive) {
return WebViewCore.nativeFindAddress(addr, caseInsensitive);
}
/*
* Clear the highlighting surrounding text matches created by findAll.
*/
public void clearMatches() {
mFindIsUp = false;
nativeSetFindIsDown();
// Now that the dialog has been removed, ensure that we scroll to a
// location that is not beyond the end of the page.
pinScrollTo(mScrollX, mScrollY, false, 0);
invalidate();
}
/**
* Query the document to see if it contains any image references. The
* message object will be dispatched with arg1 being set to 1 if images
* were found and 0 if the document does not reference any images.
* @param response The message that will be dispatched with the result.
*/
public void documentHasImages(Message response) {
if (response == null) {
return;
}
mWebViewCore.sendMessage(EventHub.DOC_HAS_IMAGES, response);
}
@Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) {
int oldX = mScrollX;
int oldY = mScrollY;
mScrollX = mScroller.getCurrX();
mScrollY = mScroller.getCurrY();
postInvalidate(); // So we draw again
if (oldX != mScrollX || oldY != mScrollY) {
// as onScrollChanged() is not called, sendOurVisibleRect()
// needs to be call explicitly
sendOurVisibleRect();
}
} else {
super.computeScroll();
}
}
private static int computeDuration(int dx, int dy) {
int distance = Math.max(Math.abs(dx), Math.abs(dy));
int duration = distance * 1000 / STD_SPEED;
return Math.min(duration, MAX_DURATION);
}
// helper to pin the scrollBy parameters (already in view coordinates)
// returns true if the scroll was changed
private boolean pinScrollBy(int dx, int dy, boolean animate, int animationDuration) {
return pinScrollTo(mScrollX + dx, mScrollY + dy, animate, animationDuration);
}
// helper to pin the scrollTo parameters (already in view coordinates)
// returns true if the scroll was changed
private boolean pinScrollTo(int x, int y, boolean animate, int animationDuration) {
x = pinLocX(x);
y = pinLocY(y);
int dx = x - mScrollX;
int dy = y - mScrollY;
if ((dx | dy) == 0) {
return false;
}
if (true && animate) {
// Log.d(LOGTAG, "startScroll: " + dx + " " + dy);
mScroller.startScroll(mScrollX, mScrollY, dx, dy,
animationDuration > 0 ? animationDuration : computeDuration(dx, dy));
invalidate();
} else {
mScroller.abortAnimation(); // just in case
scrollTo(x, y);
}
return true;
}
// Scale from content to view coordinates, and pin.
// Also called by jni webview.cpp
private boolean setContentScrollBy(int cx, int cy, boolean animate) {
if (mDrawHistory) {
// disallow WebView to change the scroll position as History Picture
// is used in the view system.
// TODO: as we switchOutDrawHistory when trackball or navigation
// keys are hit, this should be safe. Right?
return false;
}
cx = contentToView(cx);
cy = contentToView(cy);
if (mHeightCanMeasure) {
// move our visible rect according to scroll request
if (cy != 0) {
Rect tempRect = new Rect();
calcOurVisibleRect(tempRect);
tempRect.offset(cx, cy);
requestRectangleOnScreen(tempRect);
}
// FIXME: We scroll horizontally no matter what because currently
// ScrollView and ListView will not scroll horizontally.
// FIXME: Why do we only scroll horizontally if there is no
// vertical scroll?
// Log.d(LOGTAG, "setContentScrollBy cy=" + cy);
return cy == 0 && cx != 0 && pinScrollBy(cx, 0, animate, 0);
} else {
return pinScrollBy(cx, cy, animate, 0);
}
}
// scale from content to view coordinates, and pin
// return true if pin caused the final x/y different than the request cx/cy;
// return false if the view scroll to the exact position as it is requested.
private boolean setContentScrollTo(int cx, int cy) {
if (mDrawHistory) {
// disallow WebView to change the scroll position as History Picture
// is used in the view system.
// One known case where this is called is that WebCore tries to
// restore the scroll position. As history Picture already uses the
// saved scroll position, it is ok to skip this.
return false;
}
int vx = contentToView(cx);
int vy = contentToView(cy);
// Log.d(LOGTAG, "content scrollTo [" + cx + " " + cy + "] view=[" +
// vx + " " + vy + "]");
pinScrollTo(vx, vy, false, 0);
if (mScrollX != vx || mScrollY != vy) {
return true;
} else {
return false;
}
}
// scale from content to view coordinates, and pin
private void spawnContentScrollTo(int cx, int cy) {
if (mDrawHistory) {
// disallow WebView to change the scroll position as History Picture
// is used in the view system.
return;
}
int vx = contentToView(cx);
int vy = contentToView(cy);
pinScrollTo(vx, vy, true, 0);
}
/**
* These are from webkit, and are in content coordinate system (unzoomed)
*/
private void contentSizeChanged(boolean updateLayout) {
// suppress 0,0 since we usually see real dimensions soon after
// this avoids drawing the prev content in a funny place. If we find a
// way to consolidate these notifications, this check may become
// obsolete
if ((mContentWidth | mContentHeight) == 0) {
return;
}
if (mHeightCanMeasure) {
if (getMeasuredHeight() != contentToView(mContentHeight)
&& updateLayout) {
requestLayout();
}
} else if (mWidthCanMeasure) {
if (getMeasuredWidth() != contentToView(mContentWidth)
&& updateLayout) {
requestLayout();
}
} else {
// If we don't request a layout, try to send our view size to the
// native side to ensure that WebCore has the correct dimensions.
sendViewSizeZoom();
}
}
/**
* Set the WebViewClient that will receive various notifications and
* requests. This will replace the current handler.
* @param client An implementation of WebViewClient.
*/
public void setWebViewClient(WebViewClient client) {
mCallbackProxy.setWebViewClient(client);
}
/**
* Register the interface to be used when content can not be handled by
* the rendering engine, and should be downloaded instead. This will replace
* the current handler.
* @param listener An implementation of DownloadListener.
*/
public void setDownloadListener(DownloadListener listener) {
mCallbackProxy.setDownloadListener(listener);
}
/**
* Set the chrome handler. This is an implementation of WebChromeClient for
* use in handling Javascript dialogs, favicons, titles, and the progress.
* This will replace the current handler.
* @param client An implementation of WebChromeClient.
*/
public void setWebChromeClient(WebChromeClient client) {
mCallbackProxy.setWebChromeClient(client);
}
/**
* Gets the chrome handler.
* @return the current WebChromeClient instance.
*
* @hide API council approval.
*/
public WebChromeClient getWebChromeClient() {
return mCallbackProxy.getWebChromeClient();
}
/**
* Set the Picture listener. This is an interface used to receive
* notifications of a new Picture.
* @param listener An implementation of WebView.PictureListener.
*/
public void setPictureListener(PictureListener listener) {
mPictureListener = listener;
}
/**
* {@hide}
*/
/* FIXME: Debug only! Remove for SDK! */
public void externalRepresentation(Message callback) {
mWebViewCore.sendMessage(EventHub.REQUEST_EXT_REPRESENTATION, callback);
}
/**
* {@hide}
*/
/* FIXME: Debug only! Remove for SDK! */
public void documentAsText(Message callback) {
mWebViewCore.sendMessage(EventHub.REQUEST_DOC_AS_TEXT, callback);
}
/**
* Use this function to bind an object to Javascript so that the
* methods can be accessed from Javascript.
* <p><strong>IMPORTANT:</strong>
* <ul>
* <li> Using addJavascriptInterface() allows JavaScript to control your
* application. This can be a very useful feature or a dangerous security
* issue. When the HTML in the WebView is untrustworthy (for example, part
* or all of the HTML is provided by some person or process), then an
* attacker could inject HTML that will execute your code and possibly any
* code of the attacker's choosing.<br>
* Do not use addJavascriptInterface() unless all of the HTML in this
* WebView was written by you.</li>
* <li> The Java object that is bound runs in another thread and not in
* the thread that it was constructed in.</li>
* </ul></p>
* @param obj The class instance to bind to Javascript
* @param interfaceName The name to used to expose the class in Javascript
*/
public void addJavascriptInterface(Object obj, String interfaceName) {
WebViewCore.JSInterfaceData arg = new WebViewCore.JSInterfaceData();
arg.mObject = obj;
arg.mInterfaceName = interfaceName;
mWebViewCore.sendMessage(EventHub.ADD_JS_INTERFACE, arg);
}
/**
* Return the WebSettings object used to control the settings for this
* WebView.
* @return A WebSettings object that can be used to control this WebView's
* settings.
*/
public WebSettings getSettings() {
return mWebViewCore.getSettings();
}
/**
* Return the list of currently loaded plugins.
* @return The list of currently loaded plugins.
*
* @deprecated This was used for Gears, which has been deprecated.
*/
@Deprecated
public static synchronized PluginList getPluginList() {
return null;
}
/**
* @deprecated This was used for Gears, which has been deprecated.
*/
@Deprecated
public void refreshPlugins(boolean reloadOpenPages) { }
//-------------------------------------------------------------------------
// Override View methods
//-------------------------------------------------------------------------
@Override
protected void finalize() throws Throwable {
try {
destroy();
} finally {
super.finalize();
}
}
@Override
protected void onDraw(Canvas canvas) {
// if mNativeClass is 0, the WebView has been destroyed. Do nothing.
if (mNativeClass == 0) {
return;
}
if (mWebViewCore.mEndScaleZoom) {
mWebViewCore.mEndScaleZoom = false;
if (mTouchMode >= FIRST_SCROLL_ZOOM
&& mTouchMode <= LAST_SCROLL_ZOOM) {
setHorizontalScrollBarEnabled(true);
setVerticalScrollBarEnabled(true);
mTouchMode = TOUCH_DONE_MODE;
}
}
int sc = canvas.save();
if (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM) {
scrollZoomDraw(canvas);
} else {
// Update the buttons in the picture, so when we draw the picture
// to the screen, they are in the correct state.
// Tell the native side if user is a) touching the screen,
// b) pressing the trackball down, or c) pressing the enter key
// If the cursor is on a button, we need to draw it in the pressed
// state.
// If mNativeClass is 0, we should not reach here, so we do not
// need to check it again.
nativeRecordButtons(hasFocus() && hasWindowFocus(),
mTouchMode == TOUCH_SHORTPRESS_START_MODE
|| mTrackballDown || mGotCenterDown, false);
drawCoreAndCursorRing(canvas, mBackgroundColor, mDrawCursorRing);
}
canvas.restoreToCount(sc);
if (AUTO_REDRAW_HACK && mAutoRedraw) {
invalidate();
}
}
@Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
if (params.height == LayoutParams.WRAP_CONTENT) {
mWrapContent = true;
}
super.setLayoutParams(params);
}
@Override
public boolean performLongClick() {
if (mNativeClass != 0 && nativeCursorIsTextInput()) {
// Send the click so that the textfield is in focus
// FIXME: When we start respecting changes to the native textfield's
// selection, need to make sure that this does not change it.
mWebViewCore.sendMessage(EventHub.CLICK, nativeCursorFramePointer(),
nativeCursorNodePointer());
rebuildWebTextView();
}
if (inEditingMode()) {
return mWebTextView.performLongClick();
} else {
return super.performLongClick();
}
}
private void drawCoreAndCursorRing(Canvas canvas, int color,
boolean drawCursorRing) {
if (mDrawHistory) {
canvas.scale(mActualScale, mActualScale);
canvas.drawPicture(mHistoryPicture);
return;
}
boolean animateZoom = mZoomScale != 0;
boolean animateScroll = !mScroller.isFinished()
|| mVelocityTracker != null;
if (animateZoom) {
float zoomScale;
int interval = (int) (SystemClock.uptimeMillis() - mZoomStart);
if (interval < ZOOM_ANIMATION_LENGTH) {
float ratio = (float) interval / ZOOM_ANIMATION_LENGTH;
zoomScale = 1.0f / (mInvInitialZoomScale
+ (mInvFinalZoomScale - mInvInitialZoomScale) * ratio);
invalidate();
} else {
zoomScale = mZoomScale;
// set mZoomScale to be 0 as we have done animation
mZoomScale = 0;
}
float scale = zoomScale * mInvInitialZoomScale;
int tx = Math.round(scale * (mInitialScrollX + mZoomCenterX)
- mZoomCenterX);
tx = -pinLoc(tx, getViewWidth(), Math.round(mContentWidth
* zoomScale)) + mScrollX;
int ty = Math.round(scale * (mInitialScrollY + mZoomCenterY)
- mZoomCenterY);
ty = -pinLoc(ty, getViewHeight(), Math.round(mContentHeight
* zoomScale)) + mScrollY;
canvas.translate(tx, ty);
canvas.scale(zoomScale, zoomScale);
} else {
canvas.scale(mActualScale, mActualScale);
}
mWebViewCore.drawContentPicture(canvas, color, animateZoom,
animateScroll);
if (mNativeClass == 0) return;
if (mShiftIsPressed) {
if (mTouchSelection) {
nativeDrawSelectionRegion(canvas);
} else {
nativeDrawSelection(canvas, mSelectX, mSelectY,
mExtendSelection);
}
} else if (drawCursorRing) {
if (mTouchMode == TOUCH_SHORTPRESS_START_MODE) {
mTouchMode = TOUCH_SHORTPRESS_MODE;
HitTestResult hitTest = getHitTestResult();
if (hitTest != null &&
hitTest.mType != HitTestResult.UNKNOWN_TYPE) {
mPrivateHandler.sendMessageDelayed(mPrivateHandler
.obtainMessage(SWITCH_TO_LONGPRESS),
LONG_PRESS_TIMEOUT);
}
}
nativeDrawCursorRing(canvas);
}
// When the FindDialog is up, only draw the matches if we are not in
// the process of scrolling them into view.
if (mFindIsUp && !animateScroll) {
nativeDrawMatches(canvas);
}
}
private float scrollZoomGridScale(float invScale) {
float griddedInvScale = (int) (invScale * SCROLL_ZOOM_GRID)
/ (float) SCROLL_ZOOM_GRID;
return 1.0f / griddedInvScale;
}
private float scrollZoomX(float scale) {
int width = getViewWidth();
float maxScrollZoomX = mContentWidth * scale - width;
int maxX = mContentWidth - width;
return -(maxScrollZoomX > 0 ? mZoomScrollX * maxScrollZoomX / maxX
: maxScrollZoomX / 2);
}
private float scrollZoomY(float scale) {
int height = getViewHeight();
float maxScrollZoomY = mContentHeight * scale - height;
int maxY = mContentHeight - height;
return -(maxScrollZoomY > 0 ? mZoomScrollY * maxScrollZoomY / maxY
: maxScrollZoomY / 2);
}
private void drawMagnifyFrame(Canvas canvas, Rect frame, Paint paint) {
final float ADORNMENT_LEN = 16.0f;
float width = frame.width();
float height = frame.height();
Path path = new Path();
path.moveTo(-ADORNMENT_LEN, -ADORNMENT_LEN);
path.lineTo(0, 0);
path.lineTo(width, 0);
path.lineTo(width + ADORNMENT_LEN, -ADORNMENT_LEN);
path.moveTo(-ADORNMENT_LEN, height + ADORNMENT_LEN);
path.lineTo(0, height);
path.lineTo(width, height);
path.lineTo(width + ADORNMENT_LEN, height + ADORNMENT_LEN);
path.moveTo(0, 0);
path.lineTo(0, height);
path.moveTo(width, 0);
path.lineTo(width, height);
path.offset(frame.left, frame.top);
canvas.drawPath(path, paint);
}
// Returns frame surrounding magified portion of screen while
// scroll-zoom is enabled. The frame is also used to center the
// zoom-in zoom-out points at the start and end of the animation.
private Rect scrollZoomFrame(int width, int height, float halfScale) {
Rect scrollFrame = new Rect();
scrollFrame.set(mZoomScrollX, mZoomScrollY,
mZoomScrollX + width, mZoomScrollY + height);
if (mContentWidth * mZoomScrollLimit < width) {
float scale = zoomFrameScaleX(width, halfScale, 1.0f);
float offsetX = (width * scale - width) * 0.5f;
scrollFrame.left -= offsetX;
scrollFrame.right += offsetX;
}
if (mContentHeight * mZoomScrollLimit < height) {
float scale = zoomFrameScaleY(height, halfScale, 1.0f);
float offsetY = (height * scale - height) * 0.5f;
scrollFrame.top -= offsetY;
scrollFrame.bottom += offsetY;
}
return scrollFrame;
}
private float zoomFrameScaleX(int width, float halfScale, float noScale) {
// mContentWidth > width > mContentWidth * mZoomScrollLimit
if (mContentWidth <= width) {
return halfScale;
}
float part = (width - mContentWidth * mZoomScrollLimit)
/ (width * (1 - mZoomScrollLimit));
return halfScale * part + noScale * (1.0f - part);
}
private float zoomFrameScaleY(int height, float halfScale, float noScale) {
if (mContentHeight <= height) {
return halfScale;
}
float part = (height - mContentHeight * mZoomScrollLimit)
/ (height * (1 - mZoomScrollLimit));
return halfScale * part + noScale * (1.0f - part);
}
private float scrollZoomMagScale(float invScale) {
return (invScale * 2 + mInvActualScale) / 3;
}
private void scrollZoomDraw(Canvas canvas) {
float invScale = mZoomScrollInvLimit;
int elapsed = 0;
if (mTouchMode != SCROLL_ZOOM_OUT) {
elapsed = (int) Math.min(System.currentTimeMillis()
- mZoomScrollStart, SCROLL_ZOOM_DURATION);
float transitionScale = (mZoomScrollInvLimit - mInvActualScale)
* elapsed / SCROLL_ZOOM_DURATION;
if (mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) {
invScale = mInvActualScale + transitionScale;
} else { /* if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN) */
invScale = mZoomScrollInvLimit - transitionScale;
}
}
float scale = scrollZoomGridScale(invScale);
invScale = 1.0f / scale;
int width = getViewWidth();
int height = getViewHeight();
float halfScale = scrollZoomMagScale(invScale);
Rect scrollFrame = scrollZoomFrame(width, height, halfScale);
if (elapsed == SCROLL_ZOOM_DURATION) {
if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN) {
setHorizontalScrollBarEnabled(true);
setVerticalScrollBarEnabled(true);
rebuildWebTextView();
scrollTo((int) (scrollFrame.centerX() * mActualScale)
- (width >> 1), (int) (scrollFrame.centerY()
* mActualScale) - (height >> 1));
mTouchMode = TOUCH_DONE_MODE;
// Show all the child views once we are done.
mViewManager.showAll();
} else {
mTouchMode = SCROLL_ZOOM_OUT;
}
}
float newX = scrollZoomX(scale);
float newY = scrollZoomY(scale);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "scrollZoomDraw scale=" + scale + " + (" + newX
+ ", " + newY + ") mZoomScroll=(" + mZoomScrollX + ", "
+ mZoomScrollY + ")" + " invScale=" + invScale + " scale="
+ scale);
}
canvas.translate(newX, newY);
canvas.scale(scale, scale);
boolean animating = mTouchMode != SCROLL_ZOOM_OUT;
if (mDrawHistory) {
int sc = canvas.save(Canvas.CLIP_SAVE_FLAG);
Rect clip = new Rect(0, 0, mHistoryPicture.getWidth(),
mHistoryPicture.getHeight());
canvas.clipRect(clip, Region.Op.DIFFERENCE);
canvas.drawColor(mBackgroundColor);
canvas.restoreToCount(sc);
canvas.drawPicture(mHistoryPicture);
} else {
mWebViewCore.drawContentPicture(canvas, mBackgroundColor,
animating, true);
}
if (mTouchMode == TOUCH_DONE_MODE) {
return;
}
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(30.0f);
paint.setARGB(0x50, 0, 0, 0);
int maxX = mContentWidth - width;
int maxY = mContentHeight - height;
if (true) { // experiment: draw hint to place finger off magnify area
drawMagnifyFrame(canvas, scrollFrame, paint);
} else {
canvas.drawRect(scrollFrame, paint);
}
int sc = canvas.save();
canvas.clipRect(scrollFrame);
float halfX = (float) mZoomScrollX / maxX;
if (mContentWidth * mZoomScrollLimit < width) {
halfX = zoomFrameScaleX(width, 0.5f, halfX);
}
float halfY = (float) mZoomScrollY / maxY;
if (mContentHeight * mZoomScrollLimit < height) {
halfY = zoomFrameScaleY(height, 0.5f, halfY);
}
canvas.scale(halfScale, halfScale, mZoomScrollX + width * halfX
, mZoomScrollY + height * halfY);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "scrollZoomDraw halfScale=" + halfScale + " w/h=("
+ width + ", " + height + ") half=(" + halfX + ", "
+ halfY + ")");
}
if (mDrawHistory) {
canvas.drawPicture(mHistoryPicture);
} else {
mWebViewCore.drawContentPicture(canvas, mBackgroundColor,
animating, false);
}
canvas.restoreToCount(sc);
if (mTouchMode != SCROLL_ZOOM_OUT) {
invalidate();
}
}
private void zoomScrollTap(float x, float y) {
float scale = scrollZoomGridScale(mZoomScrollInvLimit);
float left = scrollZoomX(scale);
float top = scrollZoomY(scale);
int width = getViewWidth();
int height = getViewHeight();
x -= width * scale / 2;
y -= height * scale / 2;
mZoomScrollX = Math.min(mContentWidth - width
, Math.max(0, (int) ((x - left) / scale)));
mZoomScrollY = Math.min(mContentHeight - height
, Math.max(0, (int) ((y - top) / scale)));
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "zoomScrollTap scale=" + scale + " + (" + left
+ ", " + top + ") mZoomScroll=(" + mZoomScrollX + ", "
+ mZoomScrollY + ")" + " x=" + x + " y=" + y);
}
}
/**
* @hide
*/
public boolean canZoomScrollOut() {
if (mContentWidth == 0 || mContentHeight == 0) {
return false;
}
int width = getViewWidth();
int height = getViewHeight();
float x = (float) width / (float) mContentWidth;
float y = (float) height / (float) mContentHeight;
mZoomScrollLimit = Math.max(DEFAULT_MIN_ZOOM_SCALE, Math.min(x, y));
mZoomScrollInvLimit = 1.0f / mZoomScrollLimit;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "canZoomScrollOut"
+ " mInvActualScale=" + mInvActualScale
+ " mZoomScrollLimit=" + mZoomScrollLimit
+ " mZoomScrollInvLimit=" + mZoomScrollInvLimit
+ " mContentWidth=" + mContentWidth
+ " mContentHeight=" + mContentHeight
);
}
// don't zoom out unless magnify area is at least half as wide
// or tall as content
float limit = mZoomScrollLimit * 2;
return mContentWidth >= width * limit
|| mContentHeight >= height * limit;
}
private void startZoomScrollOut() {
setHorizontalScrollBarEnabled(false);
setVerticalScrollBarEnabled(false);
if (getSettings().getBuiltInZoomControls()) {
if (mZoomButtonsController.isVisible()) {
mZoomButtonsController.setVisible(false);
}
} else {
if (mZoomControlRunnable != null) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
}
if (mZoomControls != null) {
mZoomControls.hide();
}
}
int width = getViewWidth();
int height = getViewHeight();
int halfW = width >> 1;
mLastTouchX = halfW;
int halfH = height >> 1;
mLastTouchY = halfH;
mScroller.abortAnimation();
mZoomScrollStart = System.currentTimeMillis();
Rect zoomFrame = scrollZoomFrame(width, height
, scrollZoomMagScale(mZoomScrollInvLimit));
mZoomScrollX = Math.max(0, (int) ((mScrollX + halfW) * mInvActualScale)
- (zoomFrame.width() >> 1));
mZoomScrollY = Math.max(0, (int) ((mScrollY + halfH) * mInvActualScale)
- (zoomFrame.height() >> 1));
scrollTo(0, 0); // triggers inval, starts animation
clearTextEntry();
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "startZoomScrollOut mZoomScroll=("
+ mZoomScrollX + ", " + mZoomScrollY +")");
}
}
/**
* @hide
*/
public void zoomScrollOut() {
if (canZoomScrollOut() == false) {
mTouchMode = TOUCH_DONE_MODE;
return;
}
// Hide the child views while in this mode.
mViewManager.hideAll();
startZoomScrollOut();
mTouchMode = SCROLL_ZOOM_ANIMATION_OUT;
invalidate();
}
private void moveZoomScrollWindow(float x, float y) {
if (Math.abs(x - mLastZoomScrollRawX) < 1.5f
&& Math.abs(y - mLastZoomScrollRawY) < 1.5f) {
return;
}
mLastZoomScrollRawX = x;
mLastZoomScrollRawY = y;
int oldX = mZoomScrollX;
int oldY = mZoomScrollY;
int width = getViewWidth();
int height = getViewHeight();
int maxZoomX = mContentWidth - width;
if (maxZoomX > 0) {
int maxScreenX = width - (int) Math.ceil(width
* mZoomScrollLimit) - SCROLL_ZOOM_FINGER_BUFFER;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "moveZoomScrollWindow-X"
+ " maxScreenX=" + maxScreenX + " width=" + width
+ " mZoomScrollLimit=" + mZoomScrollLimit + " x=" + x);
}
x += maxScreenX * mLastScrollX / maxZoomX - mLastTouchX;
x *= Math.max(maxZoomX / maxScreenX, mZoomScrollInvLimit);
mZoomScrollX = Math.max(0, Math.min(maxZoomX, (int) x));
}
int maxZoomY = mContentHeight - height;
if (maxZoomY > 0) {
int maxScreenY = height - (int) Math.ceil(height
* mZoomScrollLimit) - SCROLL_ZOOM_FINGER_BUFFER;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "moveZoomScrollWindow-Y"
+ " maxScreenY=" + maxScreenY + " height=" + height
+ " mZoomScrollLimit=" + mZoomScrollLimit + " y=" + y);
}
y += maxScreenY * mLastScrollY / maxZoomY - mLastTouchY;
y *= Math.max(maxZoomY / maxScreenY, mZoomScrollInvLimit);
mZoomScrollY = Math.max(0, Math.min(maxZoomY, (int) y));
}
if (oldX != mZoomScrollX || oldY != mZoomScrollY) {
invalidate();
}
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "moveZoomScrollWindow"
+ " scrollTo=(" + mZoomScrollX + ", " + mZoomScrollY + ")"
+ " mLastTouch=(" + mLastTouchX + ", " + mLastTouchY + ")"
+ " maxZoom=(" + maxZoomX + ", " + maxZoomY + ")"
+ " last=("+mLastScrollX+", "+mLastScrollY+")"
+ " x=" + x + " y=" + y);
}
}
private void setZoomScrollIn() {
mZoomScrollStart = System.currentTimeMillis();
}
private float mZoomScrollLimit;
private float mZoomScrollInvLimit;
private int mLastScrollX;
private int mLastScrollY;
private long mZoomScrollStart;
private int mZoomScrollX;
private int mZoomScrollY;
private float mLastZoomScrollRawX = -1000.0f;
private float mLastZoomScrollRawY = -1000.0f;
// The zoomed scale varies from 1.0 to DEFAULT_MIN_ZOOM_SCALE == 0.25.
// The zoom animation duration SCROLL_ZOOM_DURATION == 0.5.
// Two pressures compete for gridding; a high frame rate (e.g. 20 fps)
// and minimizing font cache allocations (fewer frames is better).
// A SCROLL_ZOOM_GRID of 6 permits about 20 zoom levels over 0.5 seconds:
// the inverse of: 1.0, 1.16, 1.33, 1.5, 1.67, 1.84, 2.0, etc. to 4.0
private static final int SCROLL_ZOOM_GRID = 6;
private static final int SCROLL_ZOOM_DURATION = 500;
// Make it easier to get to the bottom of a document by reserving a 32
// pixel buffer, for when the starting drag is a bit below the bottom of
// the magnify frame.
private static final int SCROLL_ZOOM_FINGER_BUFFER = 32;
// draw history
private boolean mDrawHistory = false;
private Picture mHistoryPicture = null;
private int mHistoryWidth = 0;
private int mHistoryHeight = 0;
// Only check the flag, can be called from WebCore thread
boolean drawHistory() {
return mDrawHistory;
}
// Should only be called in UI thread
void switchOutDrawHistory() {
if (null == mWebViewCore) return; // CallbackProxy may trigger this
if (mDrawHistory && mWebViewCore.pictureReady()) {
mDrawHistory = false;
invalidate();
int oldScrollX = mScrollX;
int oldScrollY = mScrollY;
mScrollX = pinLocX(mScrollX);
mScrollY = pinLocY(mScrollY);
if (oldScrollX != mScrollX || oldScrollY != mScrollY) {
mUserScroll = false;
mWebViewCore.sendMessage(EventHub.SYNC_SCROLL, oldScrollX,
oldScrollY);
}
sendOurVisibleRect();
}
}
WebViewCore.CursorData cursorData() {
WebViewCore.CursorData result = new WebViewCore.CursorData();
result.mMoveGeneration = nativeMoveGeneration();
result.mFrame = nativeCursorFramePointer();
Point position = nativeCursorPosition();
result.mX = position.x;
result.mY = position.y;
return result;
}
/**
* Delete text from start to end in the focused textfield. If there is no
* focus, or if start == end, silently fail. If start and end are out of
* order, swap them.
* @param start Beginning of selection to delete.
* @param end End of selection to delete.
*/
/* package */ void deleteSelection(int start, int end) {
mTextGeneration++;
WebViewCore.TextSelectionData data
= new WebViewCore.TextSelectionData(start, end);
mWebViewCore.sendMessage(EventHub.DELETE_SELECTION, mTextGeneration, 0,
data);
}
/**
* Set the selection to (start, end) in the focused textfield. If start and
* end are out of order, swap them.
* @param start Beginning of selection.
* @param end End of selection.
*/
/* package */ void setSelection(int start, int end) {
mWebViewCore.sendMessage(EventHub.SET_SELECTION, start, end);
}
// Called by JNI when a touch event puts a textfield into focus.
private void displaySoftKeyboard(boolean isTextView) {
InputMethodManager imm = (InputMethodManager)
getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
if (isTextView) {
imm.showSoftInput(mWebTextView, 0);
// Now we need to fake a touch event to place the cursor where the
// user touched.
AbsoluteLayout.LayoutParams lp = (AbsoluteLayout.LayoutParams)
mWebTextView.getLayoutParams();
if (lp != null) {
// Take the last touch and adjust for the location of the
// WebTextView.
float x = mLastTouchX + (float) (mScrollX - lp.x);
float y = mLastTouchY + (float) (mScrollY - lp.y);
mWebTextView.fakeTouchEvent(x, y);
}
if (mInZoomOverview) {
// if in zoom overview mode, call doDoubleTap() to bring it back
// to normal mode so that user can enter text.
doDoubleTap();
}
}
else { // used by plugins
imm.showSoftInput(this, 0);
}
}
// Called by WebKit to instruct the UI to hide the keyboard
private void hideSoftKeyboard() {
InputMethodManager imm = (InputMethodManager)
getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(this.getWindowToken(), 0);
}
/*
* This method checks the current focus and cursor and potentially rebuilds
* mWebTextView to have the appropriate properties, such as password,
* multiline, and what text it contains. It also removes it if necessary.
*/
/* package */ void rebuildWebTextView() {
// If the WebView does not have focus, do nothing until it gains focus.
if (!hasFocus() && (null == mWebTextView || !mWebTextView.hasFocus())
|| (mTouchMode >= FIRST_SCROLL_ZOOM
&& mTouchMode <= LAST_SCROLL_ZOOM)) {
return;
}
boolean alreadyThere = inEditingMode();
// inEditingMode can only return true if mWebTextView is non-null,
// so we can safely call remove() if (alreadyThere)
if (0 == mNativeClass || !nativeFocusCandidateIsTextInput()) {
if (alreadyThere) {
mWebTextView.remove();
}
return;
}
// At this point, we know we have found an input field, so go ahead
// and create the WebTextView if necessary.
if (mWebTextView == null) {
mWebTextView = new WebTextView(mContext, WebView.this);
// Initialize our generation number.
mTextGeneration = 0;
}
mWebTextView.setTextSize(contentToView(nativeFocusCandidateTextSize()));
Rect visibleRect = new Rect();
calcOurContentVisibleRect(visibleRect);
// Note that sendOurVisibleRect calls viewToContent, so the coordinates
// should be in content coordinates.
Rect bounds = nativeFocusCandidateNodeBounds();
if (!Rect.intersects(bounds, visibleRect)) {
mWebTextView.bringIntoView();
}
String text = nativeFocusCandidateText();
int nodePointer = nativeFocusCandidatePointer();
if (alreadyThere && mWebTextView.isSameTextField(nodePointer)) {
// It is possible that we have the same textfield, but it has moved,
// i.e. In the case of opening/closing the screen.
// In that case, we need to set the dimensions, but not the other
// aspects.
// We also need to restore the selection, which gets wrecked by
// calling setTextEntryRect.
Spannable spannable = (Spannable) mWebTextView.getText();
int start = Selection.getSelectionStart(spannable);
int end = Selection.getSelectionEnd(spannable);
// If the text has been changed by webkit, update it. However, if
// there has been more UI text input, ignore it. We will receive
// another update when that text is recognized.
if (text != null && !text.equals(spannable.toString())
&& nativeTextGeneration() == mTextGeneration) {
mWebTextView.setTextAndKeepSelection(text);
} else {
Selection.setSelection(spannable, start, end);
}
} else {
Rect vBox = contentToView(bounds);
mWebTextView.setRect(vBox.left, vBox.top, vBox.width(),
vBox.height());
mWebTextView.setGravity(nativeFocusCandidateIsRtlText() ?
Gravity.RIGHT : Gravity.NO_GRAVITY);
// this needs to be called before update adapter thread starts to
// ensure the mWebTextView has the same node pointer
mWebTextView.setNodePointer(nodePointer);
int maxLength = -1;
boolean isTextField = nativeFocusCandidateIsTextField();
if (isTextField) {
maxLength = nativeFocusCandidateMaxLength();
String name = nativeFocusCandidateName();
if (mWebViewCore.getSettings().getSaveFormData()
&& name != null) {
Message update = mPrivateHandler.obtainMessage(
REQUEST_FORM_DATA, nodePointer);
RequestFormData updater = new RequestFormData(name,
getUrl(), update);
Thread t = new Thread(updater);
t.start();
}
}
mWebTextView.setMaxLength(maxLength);
AutoCompleteAdapter adapter = null;
mWebTextView.setAdapterCustom(adapter);
mWebTextView.setSingleLine(isTextField);
mWebTextView.setInPassword(nativeFocusCandidateIsPassword());
if (null == text) {
mWebTextView.setText("", 0, 0);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "rebuildWebTextView null == text");
}
} else {
// Change to true to enable the old style behavior, where
// entering a textfield/textarea always set the selection to the
// whole field. This was desirable for the case where the user
// intends to scroll past the field using the trackball.
// However, it causes a problem when replying to emails - the
// user expects the cursor to be at the beginning of the
// textarea. Testing out a new behavior, where textfields set
// selection at the end, and textareas at the beginning.
if (false) {
mWebTextView.setText(text, 0, text.length());
} else if (isTextField) {
int length = text.length();
mWebTextView.setText(text, length, length);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "rebuildWebTextView length=" + length);
}
} else {
mWebTextView.setText(text, 0, 0);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "rebuildWebTextView !isTextField");
}
}
}
mWebTextView.requestFocus();
}
}
/*
* This class requests an Adapter for the WebTextView which shows past
* entries stored in the database. It is a Runnable so that it can be done
* in its own thread, without slowing down the UI.
*/
private class RequestFormData implements Runnable {
private String mName;
private String mUrl;
private Message mUpdateMessage;
public RequestFormData(String name, String url, Message msg) {
mName = name;
mUrl = url;
mUpdateMessage = msg;
}
public void run() {
ArrayList<String> pastEntries = mDatabase.getFormData(mUrl, mName);
if (pastEntries.size() > 0) {
AutoCompleteAdapter adapter = new
AutoCompleteAdapter(mContext, pastEntries);
mUpdateMessage.obj = adapter;
mUpdateMessage.sendToTarget();
}
}
}
// This is used to determine long press with the center key. Does not
// affect long press with the trackball/touch.
private boolean mGotCenterDown = false;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "keyDown at " + System.currentTimeMillis()
+ ", " + event + ", unicode=" + event.getUnicodeChar());
}
if (mNativeClass == 0) {
return false;
}
// do this hack up front, so it always works, regardless of touch-mode
if (AUTO_REDRAW_HACK && (keyCode == KeyEvent.KEYCODE_CALL)) {
mAutoRedraw = !mAutoRedraw;
if (mAutoRedraw) {
invalidate();
}
return true;
}
// Bubble up the key event if
// 1. it is a system key; or
// 2. the host application wants to handle it; or
// 3. webview is in scroll-zoom state;
if (event.isSystem()
|| mCallbackProxy.uiOverrideKeyEvent(event)
|| (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM)) {
return false;
}
if (mShiftIsPressed == false && nativeCursorWantsKeyEvents() == false
&& (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT
|| keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT)) {
mExtendSelection = false;
mShiftIsPressed = true;
if (nativeHasCursorNode()) {
Rect rect = nativeCursorNodeBounds();
mSelectX = contentToView(rect.left);
mSelectY = contentToView(rect.top);
} else {
mSelectX = mScrollX + (int) mLastTouchX;
mSelectY = mScrollY + (int) mLastTouchY;
}
nativeHideCursor();
}
if (keyCode >= KeyEvent.KEYCODE_DPAD_UP
&& keyCode <= KeyEvent.KEYCODE_DPAD_RIGHT) {
// always handle the navigation keys in the UI thread
switchOutDrawHistory();
if (navHandledKey(keyCode, 1, false, event.getEventTime(), false)) {
playSoundEffect(keyCodeToSoundsEffect(keyCode));
return true;
}
// Bubble up the key event as WebView doesn't handle it
return false;
}
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
switchOutDrawHistory();
if (event.getRepeatCount() == 0) {
mGotCenterDown = true;
mPrivateHandler.sendMessageDelayed(mPrivateHandler
.obtainMessage(LONG_PRESS_CENTER), LONG_PRESS_TIMEOUT);
// Already checked mNativeClass, so we do not need to check it
// again.
nativeRecordButtons(hasFocus() && hasWindowFocus(), true, true);
return true;
}
// Bubble up the key event as WebView doesn't handle it
return false;
}
if (keyCode != KeyEvent.KEYCODE_SHIFT_LEFT
&& keyCode != KeyEvent.KEYCODE_SHIFT_RIGHT) {
// turn off copy select if a shift-key combo is pressed
mExtendSelection = mShiftIsPressed = false;
if (mTouchMode == TOUCH_SELECT_MODE) {
mTouchMode = TOUCH_INIT_MODE;
}
}
if (getSettings().getNavDump()) {
switch (keyCode) {
case KeyEvent.KEYCODE_4:
// "/data/data/com.android.browser/displayTree.txt"
nativeDumpDisplayTree(getUrl());
break;
case KeyEvent.KEYCODE_5:
case KeyEvent.KEYCODE_6:
// 5: dump the dom tree to the file
// "/data/data/com.android.browser/domTree.txt"
// 6: dump the dom tree to the adb log
mWebViewCore.sendMessage(EventHub.DUMP_DOMTREE,
(keyCode == KeyEvent.KEYCODE_5) ? 1 : 0, 0);
break;
case KeyEvent.KEYCODE_7:
case KeyEvent.KEYCODE_8:
// 7: dump the render tree to the file
// "/data/data/com.android.browser/renderTree.txt"
// 8: dump the render tree to the adb log
mWebViewCore.sendMessage(EventHub.DUMP_RENDERTREE,
(keyCode == KeyEvent.KEYCODE_7) ? 1 : 0, 0);
break;
case KeyEvent.KEYCODE_9:
nativeInstrumentReport();
return true;
}
}
if (nativeCursorIsPlugin()) {
nativeUpdatePluginReceivesEvents();
invalidate();
} else if (nativeCursorIsTextInput()) {
// This message will put the node in focus, for the DOM's notion
// of focus, and make the focuscontroller active
mWebViewCore.sendMessage(EventHub.CLICK, nativeCursorFramePointer(),
nativeCursorNodePointer());
// This will bring up the WebTextView and put it in focus, for
// our view system's notion of focus
rebuildWebTextView();
// Now we need to pass the event to it
return mWebTextView.onKeyDown(keyCode, event);
} else if (nativeHasFocusNode()) {
// In this case, the cursor is not on a text input, but the focus
// might be. Check it, and if so, hand over to the WebTextView.
rebuildWebTextView();
if (inEditingMode()) {
return mWebTextView.onKeyDown(keyCode, event);
}
}
// TODO: should we pass all the keys to DOM or check the meta tag
if (nativeCursorWantsKeyEvents() || true) {
// pass the key to DOM
mWebViewCore.sendMessage(EventHub.KEY_DOWN, event);
// return true as DOM handles the key
return true;
}
// Bubble up the key event as WebView doesn't handle it
return false;
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "keyUp at " + System.currentTimeMillis()
+ ", " + event + ", unicode=" + event.getUnicodeChar());
}
if (mNativeClass == 0) {
return false;
}
// special CALL handling when cursor node's href is "tel:XXX"
if (keyCode == KeyEvent.KEYCODE_CALL && nativeHasCursorNode()) {
String text = nativeCursorText();
if (!nativeCursorIsTextInput() && text != null
&& text.startsWith(SCHEME_TEL)) {
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(text));
getContext().startActivity(intent);
return true;
}
}
// Bubble up the key event if
// 1. it is a system key; or
// 2. the host application wants to handle it;
if (event.isSystem() || mCallbackProxy.uiOverrideKeyEvent(event)) {
return false;
}
// special handling in scroll_zoom state
if (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM) {
if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode
&& mTouchMode != SCROLL_ZOOM_ANIMATION_IN) {
setZoomScrollIn();
mTouchMode = SCROLL_ZOOM_ANIMATION_IN;
invalidate();
return true;
}
return false;
}
if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT
|| keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT) {
if (commitCopy()) {
return true;
}
}
if (keyCode >= KeyEvent.KEYCODE_DPAD_UP
&& keyCode <= KeyEvent.KEYCODE_DPAD_RIGHT) {
// always handle the navigation keys in the UI thread
// Bubble up the key event as WebView doesn't handle it
return false;
}
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
// remove the long press message first
mPrivateHandler.removeMessages(LONG_PRESS_CENTER);
mGotCenterDown = false;
if (mShiftIsPressed) {
return false;
}
if (getSettings().supportZoom()
&& mTouchMode == TOUCH_DOUBLECLICK_MODE) {
zoomScrollOut();
} else {
mPrivateHandler.sendMessageDelayed(mPrivateHandler
.obtainMessage(SWITCH_TO_CLICK), TAP_TIMEOUT);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "TOUCH_DOUBLECLICK_MODE");
}
mTouchMode = TOUCH_DOUBLECLICK_MODE;
}
return true;
}
// TODO: should we pass all the keys to DOM or check the meta tag
if (nativeCursorWantsKeyEvents() || true) {
// pass the key to DOM
mWebViewCore.sendMessage(EventHub.KEY_UP, event);
// return true as DOM handles the key
return true;
}
// Bubble up the key event as WebView doesn't handle it
return false;
}
/**
* @hide
*/
public void emulateShiftHeld() {
mExtendSelection = false;
mShiftIsPressed = true;
nativeHideCursor();
}
private boolean commitCopy() {
boolean copiedSomething = false;
if (mExtendSelection) {
// copy region so core operates on copy without touching orig.
Region selection = new Region(nativeGetSelection());
if (selection.isEmpty() == false) {
Toast.makeText(mContext
, com.android.internal.R.string.text_copied
, Toast.LENGTH_SHORT).show();
mWebViewCore.sendMessage(EventHub.GET_SELECTION, selection);
copiedSomething = true;
}
mExtendSelection = false;
}
mShiftIsPressed = false;
if (mTouchMode == TOUCH_SELECT_MODE) {
mTouchMode = TOUCH_INIT_MODE;
}
return copiedSomething;
}
// Set this as a hierarchy change listener so we can know when this view
// is removed and still have access to our parent.
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
ViewParent parent = getParent();
if (parent instanceof ViewGroup) {
ViewGroup p = (ViewGroup) parent;
p.setOnHierarchyChangeListener(this);
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
ViewParent parent = getParent();
if (parent instanceof ViewGroup) {
ViewGroup p = (ViewGroup) parent;
p.setOnHierarchyChangeListener(null);
}
// Clean up the zoom controller
mZoomButtonsController.setVisible(false);
}
// Implementation for OnHierarchyChangeListener
public void onChildViewAdded(View parent, View child) {}
public void onChildViewRemoved(View p, View child) {
if (child == this) {
clearTextEntry();
}
}
/**
* @deprecated WebView should not have implemented
* ViewTreeObserver.OnGlobalFocusChangeListener. This method
* does nothing now.
*/
@Deprecated
public void onGlobalFocusChanged(View oldFocus, View newFocus) {
}
// To avoid drawing the cursor ring, and remove the TextView when our window
// loses focus.
@Override
public void onWindowFocusChanged(boolean hasWindowFocus) {
if (hasWindowFocus) {
if (hasFocus()) {
// If our window regained focus, and we have focus, then begin
// drawing the cursor ring
mDrawCursorRing = true;
if (mNativeClass != 0) {
nativeRecordButtons(true, false, true);
if (inEditingMode()) {
mWebViewCore.sendMessage(EventHub.SET_ACTIVE, 1, 0);
}
}
} else {
// If our window gained focus, but we do not have it, do not
// draw the cursor ring.
mDrawCursorRing = false;
// We do not call nativeRecordButtons here because we assume
// that when we lost focus, or window focus, it got called with
// false for the first parameter
}
} else {
if (getSettings().getBuiltInZoomControls() && !mZoomButtonsController.isVisible()) {
/*
* The zoom controls come in their own window, so our window
* loses focus. Our policy is to not draw the cursor ring if
* our window is not focused, but this is an exception since
* the user can still navigate the web page with the zoom
* controls showing.
*/
// If our window has lost focus, stop drawing the cursor ring
mDrawCursorRing = false;
}
mGotKeyDown = false;
mShiftIsPressed = false;
if (mNativeClass != 0) {
nativeRecordButtons(false, false, true);
}
setFocusControllerInactive();
}
invalidate();
super.onWindowFocusChanged(hasWindowFocus);
}
/*
* Pass a message to WebCore Thread, telling the WebCore::Page's
* FocusController to be "inactive" so that it will
* not draw the blinking cursor. It gets set to "active" to draw the cursor
* in WebViewCore.cpp, when the WebCore thread receives key events/clicks.
*/
/* package */ void setFocusControllerInactive() {
// Do not need to also check whether mWebViewCore is null, because
// mNativeClass is only set if mWebViewCore is non null
if (mNativeClass == 0) return;
mWebViewCore.sendMessage(EventHub.SET_ACTIVE, 0, 0);
}
@Override
protected void onFocusChanged(boolean focused, int direction,
Rect previouslyFocusedRect) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "MT focusChanged " + focused + ", " + direction);
}
if (focused) {
// When we regain focus, if we have window focus, resume drawing
// the cursor ring
if (hasWindowFocus()) {
mDrawCursorRing = true;
if (mNativeClass != 0) {
nativeRecordButtons(true, false, true);
}
//} else {
// The WebView has gained focus while we do not have
// windowfocus. When our window lost focus, we should have
// called nativeRecordButtons(false...)
}
} else {
// When we lost focus, unless focus went to the TextView (which is
// true if we are in editing mode), stop drawing the cursor ring.
if (!inEditingMode()) {
mDrawCursorRing = false;
if (mNativeClass != 0) {
nativeRecordButtons(false, false, true);
}
setFocusControllerInactive();
}
mGotKeyDown = false;
}
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
@Override
protected void onSizeChanged(int w, int h, int ow, int oh) {
super.onSizeChanged(w, h, ow, oh);
// Center zooming to the center of the screen.
mZoomCenterX = getViewWidth() * .5f;
mZoomCenterY = getViewHeight() * .5f;
// update mMinZoomScale if the minimum zoom scale is not fixed
if (!mMinZoomScaleFixed) {
mMinZoomScale = (float) getViewWidth()
/ (mDrawHistory ? mHistoryPicture.getWidth()
: mZoomOverviewWidth);
}
// we always force, in case our height changed, in which case we still
// want to send the notification over to webkit
setNewZoomScale(mActualScale, true);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
sendOurVisibleRect();
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
boolean dispatch = true;
if (!inEditingMode()) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
mGotKeyDown = true;
} else {
if (!mGotKeyDown) {
/*
* We got a key up for which we were not the recipient of
* the original key down. Don't give it to the view.
*/
dispatch = false;
}
mGotKeyDown = false;
}
}
if (dispatch) {
return super.dispatchKeyEvent(event);
} else {
// We didn't dispatch, so let something else handle the key
return false;
}
}
// Here are the snap align logic:
// 1. If it starts nearly horizontally or vertically, snap align;
// 2. If there is a dramitic direction change, let it go;
// 3. If there is a same direction back and forth, lock it.
// adjustable parameters
private int mMinLockSnapReverseDistance;
private static final float MAX_SLOPE_FOR_DIAG = 1.5f;
private static final int MIN_BREAK_SNAP_CROSS_DISTANCE = 80;
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (mNativeClass == 0 || !isClickable() || !isLongClickable()) {
return false;
}
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, ev + " at " + ev.getEventTime() + " mTouchMode="
+ mTouchMode);
}
int action = ev.getAction();
float x = ev.getX();
float y = ev.getY();
long eventTime = ev.getEventTime();
// Due to the touch screen edge effect, a touch closer to the edge
// always snapped to the edge. As getViewWidth() can be different from
// getWidth() due to the scrollbar, adjusting the point to match
// getViewWidth(). Same applied to the height.
if (x > getViewWidth() - 1) {
x = getViewWidth() - 1;
}
if (y > getViewHeight() - 1) {
y = getViewHeight() - 1;
}
// pass the touch events from UI thread to WebCore thread
if (mForwardTouchEvents && mTouchMode != SCROLL_ZOOM_OUT
&& mTouchMode != SCROLL_ZOOM_ANIMATION_IN
&& mTouchMode != SCROLL_ZOOM_ANIMATION_OUT
&& (action != MotionEvent.ACTION_MOVE ||
eventTime - mLastSentTouchTime > TOUCH_SENT_INTERVAL)) {
WebViewCore.TouchEventData ted = new WebViewCore.TouchEventData();
ted.mAction = action;
ted.mX = viewToContent((int) x + mScrollX);
ted.mY = viewToContent((int) y + mScrollY);
mWebViewCore.sendMessage(EventHub.TOUCH_EVENT, ted);
mLastSentTouchTime = eventTime;
}
int deltaX = (int) (mLastTouchX - x);
int deltaY = (int) (mLastTouchY - y);
switch (action) {
case MotionEvent.ACTION_DOWN: {
if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN
|| mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) {
// no interaction while animation is in progress
break;
} else if (mTouchMode == SCROLL_ZOOM_OUT) {
mLastScrollX = mZoomScrollX;
mLastScrollY = mZoomScrollY;
// If two taps are close, ignore the first tap
} else if (!mScroller.isFinished()) {
mScroller.abortAnimation();
mTouchMode = TOUCH_DRAG_START_MODE;
mPrivateHandler.removeMessages(RESUME_WEBCORE_UPDATE);
} else if (mShiftIsPressed) {
mSelectX = mScrollX + (int) x;
mSelectY = mScrollY + (int) y;
mTouchMode = TOUCH_SELECT_MODE;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "select=" + mSelectX + "," + mSelectY);
}
nativeMoveSelection(viewToContent(mSelectX)
, viewToContent(mSelectY), false);
mTouchSelection = mExtendSelection = true;
} else if (mPrivateHandler.hasMessages(RELEASE_SINGLE_TAP)) {
mPrivateHandler.removeMessages(RELEASE_SINGLE_TAP);
if (deltaX * deltaX + deltaY * deltaY < mDoubleTapSlopSquare) {
mTouchMode = TOUCH_DOUBLE_TAP_MODE;
} else {
// commit the short press action for the previous tap
doShortPress();
// continue, mTouchMode should be still TOUCH_INIT_MODE
}
} else {
mTouchMode = TOUCH_INIT_MODE;
mPreventDrag = mForwardTouchEvents;
mWebViewCore.sendMessage(
EventHub.UPDATE_FRAME_CACHE_IF_LOADING);
if (mLogEvent && eventTime - mLastTouchUpTime < 1000) {
EventLog.writeEvent(EVENT_LOG_DOUBLE_TAP_DURATION,
(eventTime - mLastTouchUpTime), eventTime);
}
}
// Trigger the link
if (mTouchMode == TOUCH_INIT_MODE
|| mTouchMode == TOUCH_DOUBLE_TAP_MODE) {
mPrivateHandler.sendMessageDelayed(mPrivateHandler
.obtainMessage(SWITCH_TO_SHORTPRESS), TAP_TIMEOUT);
}
// Remember where the motion event started
mLastTouchX = x;
mLastTouchY = y;
mLastTouchTime = eventTime;
mVelocityTracker = VelocityTracker.obtain();
mSnapScrollMode = SNAP_NONE;
break;
}
case MotionEvent.ACTION_MOVE: {
if (mTouchMode == TOUCH_DONE_MODE
|| mTouchMode == SCROLL_ZOOM_ANIMATION_IN
|| mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) {
// no dragging during scroll zoom animation
break;
}
if (mTouchMode == SCROLL_ZOOM_OUT) {
// while fully zoomed out, move the virtual window
moveZoomScrollWindow(x, y);
break;
}
mVelocityTracker.addMovement(ev);
if (mTouchMode != TOUCH_DRAG_MODE) {
if (mTouchMode == TOUCH_SELECT_MODE) {
mSelectX = mScrollX + (int) x;
mSelectY = mScrollY + (int) y;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "xtend=" + mSelectX + "," + mSelectY);
}
nativeMoveSelection(viewToContent(mSelectX)
, viewToContent(mSelectY), true);
invalidate();
break;
}
if (mPreventDrag || (deltaX * deltaX + deltaY * deltaY)
< mTouchSlopSquare) {
break;
}
if (mTouchMode == TOUCH_SHORTPRESS_MODE
|| mTouchMode == TOUCH_SHORTPRESS_START_MODE) {
mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS);
} else if (mTouchMode == TOUCH_INIT_MODE
|| mTouchMode == TOUCH_DOUBLE_TAP_MODE) {
mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS);
}
// if it starts nearly horizontal or vertical, enforce it
int ax = Math.abs(deltaX);
int ay = Math.abs(deltaY);
if (ax > MAX_SLOPE_FOR_DIAG * ay) {
mSnapScrollMode = SNAP_X;
mSnapPositive = deltaX > 0;
} else if (ay > MAX_SLOPE_FOR_DIAG * ax) {
mSnapScrollMode = SNAP_Y;
mSnapPositive = deltaY > 0;
}
mTouchMode = TOUCH_DRAG_MODE;
WebViewCore.pauseUpdate(mWebViewCore);
if (!mDragFromTextInput) {
nativeHideCursor();
}
WebSettings settings = getSettings();
if (settings.supportZoom()
&& settings.getBuiltInZoomControls()
&& !mZoomButtonsController.isVisible()
&& (canZoomScrollOut() ||
mMinZoomScale < mMaxZoomScale)) {
mZoomButtonsController.setVisible(true);
}
}
// do pan
int newScrollX = pinLocX(mScrollX + deltaX);
deltaX = newScrollX - mScrollX;
int newScrollY = pinLocY(mScrollY + deltaY);
deltaY = newScrollY - mScrollY;
boolean done = false;
if (deltaX == 0 && deltaY == 0) {
done = true;
} else {
if (mSnapScrollMode == SNAP_X || mSnapScrollMode == SNAP_Y) {
int ax = Math.abs(deltaX);
int ay = Math.abs(deltaY);
if (mSnapScrollMode == SNAP_X) {
// radical change means getting out of snap mode
if (ay > MAX_SLOPE_FOR_DIAG * ax
&& ay > MIN_BREAK_SNAP_CROSS_DISTANCE) {
mSnapScrollMode = SNAP_NONE;
}
// reverse direction means lock in the snap mode
if ((ax > MAX_SLOPE_FOR_DIAG * ay) &&
((mSnapPositive &&
deltaX < -mMinLockSnapReverseDistance)
|| (!mSnapPositive &&
deltaX > mMinLockSnapReverseDistance))) {
mSnapScrollMode = SNAP_X_LOCK;
}
} else {
// radical change means getting out of snap mode
if ((ax > MAX_SLOPE_FOR_DIAG * ay)
&& ax > MIN_BREAK_SNAP_CROSS_DISTANCE) {
mSnapScrollMode = SNAP_NONE;
}
// reverse direction means lock in the snap mode
if ((ay > MAX_SLOPE_FOR_DIAG * ax) &&
((mSnapPositive &&
deltaY < -mMinLockSnapReverseDistance)
|| (!mSnapPositive &&
deltaY > mMinLockSnapReverseDistance))) {
mSnapScrollMode = SNAP_Y_LOCK;
}
}
}
if (mSnapScrollMode == SNAP_X
|| mSnapScrollMode == SNAP_X_LOCK) {
scrollBy(deltaX, 0);
mLastTouchX = x;
} else if (mSnapScrollMode == SNAP_Y
|| mSnapScrollMode == SNAP_Y_LOCK) {
scrollBy(0, deltaY);
mLastTouchY = y;
} else {
scrollBy(deltaX, deltaY);
mLastTouchX = x;
mLastTouchY = y;
}
mLastTouchTime = eventTime;
mUserScroll = true;
}
if (!getSettings().getBuiltInZoomControls()) {
boolean showPlusMinus = mMinZoomScale < mMaxZoomScale;
boolean showMagnify = canZoomScrollOut();
if (mZoomControls != null && (showPlusMinus || showMagnify)) {
if (mZoomControls.getVisibility() == View.VISIBLE) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
} else {
mZoomControls.show(showPlusMinus, showMagnify);
}
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
}
}
if (done) {
// return false to indicate that we can't pan out of the
// view space
return false;
}
break;
}
case MotionEvent.ACTION_UP: {
mLastTouchUpTime = eventTime;
switch (mTouchMode) {
case TOUCH_DOUBLE_TAP_MODE: // double tap
mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS);
mTouchMode = TOUCH_DONE_MODE;
doDoubleTap();
break;
case TOUCH_INIT_MODE: // tap
if (ENABLE_DOUBLETAP_ZOOM) {
mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS);
if (!mPreventDrag) {
mPrivateHandler.sendMessageDelayed(
mPrivateHandler.obtainMessage(
RELEASE_SINGLE_TAP),
ViewConfiguration.getDoubleTapTimeout());
}
break;
}
// fall through
case TOUCH_SHORTPRESS_START_MODE:
case TOUCH_SHORTPRESS_MODE:
mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS);
mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS);
mTouchMode = TOUCH_DONE_MODE;
doShortPress();
break;
case TOUCH_SELECT_MODE:
commitCopy();
mTouchSelection = false;
break;
case SCROLL_ZOOM_ANIMATION_IN:
case SCROLL_ZOOM_ANIMATION_OUT:
// no action during scroll animation
break;
case SCROLL_ZOOM_OUT:
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "ACTION_UP SCROLL_ZOOM_OUT"
+ " eventTime - mLastTouchTime="
+ (eventTime - mLastTouchTime));
}
// for now, always zoom back when the drag completes
if (true || eventTime - mLastTouchTime < TAP_TIMEOUT) {
// but if we tap, zoom in where we tap
if (eventTime - mLastTouchTime < TAP_TIMEOUT) {
zoomScrollTap(x, y);
}
// start zooming in back to the original view
setZoomScrollIn();
mTouchMode = SCROLL_ZOOM_ANIMATION_IN;
invalidate();
}
break;
case TOUCH_DRAG_MODE:
// if the user waits a while w/o moving before the
// up, we don't want to do a fling
if (eventTime - mLastTouchTime <= MIN_FLING_TIME) {
mVelocityTracker.addMovement(ev);
doFling();
break;
}
WebViewCore.resumeUpdate(mWebViewCore);
break;
case TOUCH_DRAG_START_MODE:
case TOUCH_DONE_MODE:
// do nothing
break;
}
// we also use mVelocityTracker == null to tell us that we are
// not "moving around", so we can take the slower/prettier
// mode in the drawing code
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
break;
}
case MotionEvent.ACTION_CANCEL: {
// we also use mVelocityTracker == null to tell us that we are
// not "moving around", so we can take the slower/prettier
// mode in the drawing code
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
if (mTouchMode == SCROLL_ZOOM_OUT ||
mTouchMode == SCROLL_ZOOM_ANIMATION_IN) {
scrollTo(mZoomScrollX, mZoomScrollY);
} else if (mTouchMode == TOUCH_DRAG_MODE) {
WebViewCore.resumeUpdate(mWebViewCore);
}
mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS);
mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS);
mTouchMode = TOUCH_DONE_MODE;
nativeHideCursor();
break;
}
}
return true;
}
private long mTrackballFirstTime = 0;
private long mTrackballLastTime = 0;
private float mTrackballRemainsX = 0.0f;
private float mTrackballRemainsY = 0.0f;
private int mTrackballXMove = 0;
private int mTrackballYMove = 0;
private boolean mExtendSelection = false;
private boolean mTouchSelection = false;
private static final int TRACKBALL_KEY_TIMEOUT = 1000;
private static final int TRACKBALL_TIMEOUT = 200;
private static final int TRACKBALL_WAIT = 100;
private static final int TRACKBALL_SCALE = 400;
private static final int TRACKBALL_SCROLL_COUNT = 5;
private static final int TRACKBALL_MOVE_COUNT = 10;
private static final int TRACKBALL_MULTIPLIER = 3;
private static final int SELECT_CURSOR_OFFSET = 16;
private int mSelectX = 0;
private int mSelectY = 0;
private boolean mShiftIsPressed = false;
private boolean mTrackballDown = false;
private long mTrackballUpTime = 0;
private long mLastCursorTime = 0;
private Rect mLastCursorBounds;
// Set by default; BrowserActivity clears to interpret trackball data
// directly for movement. Currently, the framework only passes
// arrow key events, not trackball events, from one child to the next
private boolean mMapTrackballToArrowKeys = true;
public void setMapTrackballToArrowKeys(boolean setMap) {
mMapTrackballToArrowKeys = setMap;
}
void resetTrackballTime() {
mTrackballLastTime = 0;
}
@Override
public boolean onTrackballEvent(MotionEvent ev) {
long time = ev.getEventTime();
if ((ev.getMetaState() & KeyEvent.META_ALT_ON) != 0) {
if (ev.getY() > 0) pageDown(true);
if (ev.getY() < 0) pageUp(true);
return true;
}
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
mPrivateHandler.removeMessages(SWITCH_TO_CLICK);
mTrackballDown = true;
if (mNativeClass == 0) {
return false;
}
nativeRecordButtons(hasFocus() && hasWindowFocus(), true, true);
if (time - mLastCursorTime <= TRACKBALL_TIMEOUT
&& !mLastCursorBounds.equals(nativeGetCursorRingBounds())) {
nativeSelectBestAt(mLastCursorBounds);
}
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "onTrackballEvent down ev=" + ev
+ " time=" + time
+ " mLastCursorTime=" + mLastCursorTime);
}
if (isInTouchMode()) requestFocusFromTouch();
return false; // let common code in onKeyDown at it
}
if (ev.getAction() == MotionEvent.ACTION_UP) {
// LONG_PRESS_CENTER is set in common onKeyDown
mPrivateHandler.removeMessages(LONG_PRESS_CENTER);
mTrackballDown = false;
mTrackballUpTime = time;
if (mShiftIsPressed) {
if (mExtendSelection) {
commitCopy();
} else {
mExtendSelection = true;
}
}
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "onTrackballEvent up ev=" + ev
+ " time=" + time
);
}
return false; // let common code in onKeyUp at it
}
if (mMapTrackballToArrowKeys && mShiftIsPressed == false) {
if (DebugFlags.WEB_VIEW) Log.v(LOGTAG, "onTrackballEvent gmail quit");
return false;
}
// no move if we're still waiting on SWITCH_TO_CLICK timeout
if (mTouchMode == TOUCH_DOUBLECLICK_MODE) {
if (DebugFlags.WEB_VIEW) Log.v(LOGTAG, "onTrackballEvent 2 click quit");
return true;
}
if (mTrackballDown) {
if (DebugFlags.WEB_VIEW) Log.v(LOGTAG, "onTrackballEvent down quit");
return true; // discard move if trackball is down
}
if (time - mTrackballUpTime < TRACKBALL_TIMEOUT) {
if (DebugFlags.WEB_VIEW) Log.v(LOGTAG, "onTrackballEvent up timeout quit");
return true;
}
// TODO: alternatively we can do panning as touch does
switchOutDrawHistory();
if (time - mTrackballLastTime > TRACKBALL_TIMEOUT) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "onTrackballEvent time="
+ time + " last=" + mTrackballLastTime);
}
mTrackballFirstTime = time;
mTrackballXMove = mTrackballYMove = 0;
}
mTrackballLastTime = time;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "onTrackballEvent ev=" + ev + " time=" + time);
}
mTrackballRemainsX += ev.getX();
mTrackballRemainsY += ev.getY();
doTrackball(time);
return true;
}
void moveSelection(float xRate, float yRate) {
if (mNativeClass == 0)
return;
int width = getViewWidth();
int height = getViewHeight();
mSelectX += scaleTrackballX(xRate, width);
mSelectY += scaleTrackballY(yRate, height);
int maxX = width + mScrollX;
int maxY = height + mScrollY;
mSelectX = Math.min(maxX, Math.max(mScrollX - SELECT_CURSOR_OFFSET
, mSelectX));
mSelectY = Math.min(maxY, Math.max(mScrollY - SELECT_CURSOR_OFFSET
, mSelectY));
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "moveSelection"
+ " mSelectX=" + mSelectX
+ " mSelectY=" + mSelectY
+ " mScrollX=" + mScrollX
+ " mScrollY=" + mScrollY
+ " xRate=" + xRate
+ " yRate=" + yRate
);
}
nativeMoveSelection(viewToContent(mSelectX)
, viewToContent(mSelectY), mExtendSelection);
int scrollX = mSelectX < mScrollX ? -SELECT_CURSOR_OFFSET
: mSelectX > maxX - SELECT_CURSOR_OFFSET ? SELECT_CURSOR_OFFSET
: 0;
int scrollY = mSelectY < mScrollY ? -SELECT_CURSOR_OFFSET
: mSelectY > maxY - SELECT_CURSOR_OFFSET ? SELECT_CURSOR_OFFSET
: 0;
pinScrollBy(scrollX, scrollY, true, 0);
Rect select = new Rect(mSelectX, mSelectY, mSelectX + 1, mSelectY + 1);
requestRectangleOnScreen(select);
invalidate();
}
private int scaleTrackballX(float xRate, int width) {
int xMove = (int) (xRate / TRACKBALL_SCALE * width);
int nextXMove = xMove;
if (xMove > 0) {
if (xMove > mTrackballXMove) {
xMove -= mTrackballXMove;
}
} else if (xMove < mTrackballXMove) {
xMove -= mTrackballXMove;
}
mTrackballXMove = nextXMove;
return xMove;
}
private int scaleTrackballY(float yRate, int height) {
int yMove = (int) (yRate / TRACKBALL_SCALE * height);
int nextYMove = yMove;
if (yMove > 0) {
if (yMove > mTrackballYMove) {
yMove -= mTrackballYMove;
}
} else if (yMove < mTrackballYMove) {
yMove -= mTrackballYMove;
}
mTrackballYMove = nextYMove;
return yMove;
}
private int keyCodeToSoundsEffect(int keyCode) {
switch(keyCode) {
case KeyEvent.KEYCODE_DPAD_UP:
return SoundEffectConstants.NAVIGATION_UP;
case KeyEvent.KEYCODE_DPAD_RIGHT:
return SoundEffectConstants.NAVIGATION_RIGHT;
case KeyEvent.KEYCODE_DPAD_DOWN:
return SoundEffectConstants.NAVIGATION_DOWN;
case KeyEvent.KEYCODE_DPAD_LEFT:
return SoundEffectConstants.NAVIGATION_LEFT;
}
throw new IllegalArgumentException("keyCode must be one of " +
"{KEYCODE_DPAD_UP, KEYCODE_DPAD_RIGHT, KEYCODE_DPAD_DOWN, " +
"KEYCODE_DPAD_LEFT}.");
}
private void doTrackball(long time) {
int elapsed = (int) (mTrackballLastTime - mTrackballFirstTime);
if (elapsed == 0) {
elapsed = TRACKBALL_TIMEOUT;
}
float xRate = mTrackballRemainsX * 1000 / elapsed;
float yRate = mTrackballRemainsY * 1000 / elapsed;
if (mShiftIsPressed) {
moveSelection(xRate, yRate);
mTrackballRemainsX = mTrackballRemainsY = 0;
return;
}
float ax = Math.abs(xRate);
float ay = Math.abs(yRate);
float maxA = Math.max(ax, ay);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "doTrackball elapsed=" + elapsed
+ " xRate=" + xRate
+ " yRate=" + yRate
+ " mTrackballRemainsX=" + mTrackballRemainsX
+ " mTrackballRemainsY=" + mTrackballRemainsY);
}
int width = mContentWidth - getViewWidth();
int height = mContentHeight - getViewHeight();
if (width < 0) width = 0;
if (height < 0) height = 0;
if (mTouchMode == SCROLL_ZOOM_OUT) {
int oldX = mZoomScrollX;
int oldY = mZoomScrollY;
int maxWH = Math.max(width, height);
mZoomScrollX += scaleTrackballX(xRate, maxWH);
mZoomScrollY += scaleTrackballY(yRate, maxWH);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "doTrackball SCROLL_ZOOM_OUT"
+ " mZoomScrollX=" + mZoomScrollX
+ " mZoomScrollY=" + mZoomScrollY);
}
mZoomScrollX = Math.min(width, Math.max(0, mZoomScrollX));
mZoomScrollY = Math.min(height, Math.max(0, mZoomScrollY));
if (oldX != mZoomScrollX || oldY != mZoomScrollY) {
invalidate();
}
mTrackballRemainsX = mTrackballRemainsY = 0;
return;
}
ax = Math.abs(mTrackballRemainsX * TRACKBALL_MULTIPLIER);
ay = Math.abs(mTrackballRemainsY * TRACKBALL_MULTIPLIER);
maxA = Math.max(ax, ay);
int count = Math.max(0, (int) maxA);
int oldScrollX = mScrollX;
int oldScrollY = mScrollY;
if (count > 0) {
int selectKeyCode = ax < ay ? mTrackballRemainsY < 0 ?
KeyEvent.KEYCODE_DPAD_UP : KeyEvent.KEYCODE_DPAD_DOWN :
mTrackballRemainsX < 0 ? KeyEvent.KEYCODE_DPAD_LEFT :
KeyEvent.KEYCODE_DPAD_RIGHT;
count = Math.min(count, TRACKBALL_MOVE_COUNT);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "doTrackball keyCode=" + selectKeyCode
+ " count=" + count
+ " mTrackballRemainsX=" + mTrackballRemainsX
+ " mTrackballRemainsY=" + mTrackballRemainsY);
}
if (navHandledKey(selectKeyCode, count, false, time, false)) {
playSoundEffect(keyCodeToSoundsEffect(selectKeyCode));
}
mTrackballRemainsX = mTrackballRemainsY = 0;
}
if (count >= TRACKBALL_SCROLL_COUNT) {
int xMove = scaleTrackballX(xRate, width);
int yMove = scaleTrackballY(yRate, height);
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "doTrackball pinScrollBy"
+ " count=" + count
+ " xMove=" + xMove + " yMove=" + yMove
+ " mScrollX-oldScrollX=" + (mScrollX-oldScrollX)
+ " mScrollY-oldScrollY=" + (mScrollY-oldScrollY)
);
}
if (Math.abs(mScrollX - oldScrollX) > Math.abs(xMove)) {
xMove = 0;
}
if (Math.abs(mScrollY - oldScrollY) > Math.abs(yMove)) {
yMove = 0;
}
if (xMove != 0 || yMove != 0) {
pinScrollBy(xMove, yMove, true, 0);
}
mUserScroll = true;
}
}
public void flingScroll(int vx, int vy) {
int maxX = Math.max(computeHorizontalScrollRange() - getViewWidth(), 0);
int maxY = Math.max(computeVerticalScrollRange() - getViewHeight(), 0);
mScroller.fling(mScrollX, mScrollY, vx, vy, 0, maxX, 0, maxY);
invalidate();
}
private void doFling() {
if (mVelocityTracker == null) {
return;
}
int maxX = Math.max(computeHorizontalScrollRange() - getViewWidth(), 0);
int maxY = Math.max(computeVerticalScrollRange() - getViewHeight(), 0);
mVelocityTracker.computeCurrentVelocity(1000, mMaximumFling);
int vx = (int) mVelocityTracker.getXVelocity();
int vy = (int) mVelocityTracker.getYVelocity();
if (mSnapScrollMode != SNAP_NONE) {
if (mSnapScrollMode == SNAP_X || mSnapScrollMode == SNAP_X_LOCK) {
vy = 0;
} else {
vx = 0;
}
}
if (true /* EMG release: make our fling more like Maps' */) {
// maps cuts their velocity in half
vx = vx * 3 / 4;
vy = vy * 3 / 4;
}
mScroller.fling(mScrollX, mScrollY, -vx, -vy, 0, maxX, 0, maxY);
// TODO: duration is calculated based on velocity, if the range is
// small, the animation will stop before duration is up. We may
// want to calculate how long the animation is going to run to precisely
// resume the webcore update.
final int time = mScroller.getDuration();
mPrivateHandler.sendEmptyMessageDelayed(RESUME_WEBCORE_UPDATE, time);
invalidate();
}
private boolean zoomWithPreview(float scale) {
float oldScale = mActualScale;
mInitialScrollX = mScrollX;
mInitialScrollY = mScrollY;
// snap to DEFAULT_SCALE if it is close
if (scale > (mDefaultScale - 0.05) && scale < (mDefaultScale + 0.05)) {
scale = mDefaultScale;
}
setNewZoomScale(scale, false);
if (oldScale != mActualScale) {
// use mZoomPickerScale to see zoom preview first
mZoomStart = SystemClock.uptimeMillis();
mInvInitialZoomScale = 1.0f / oldScale;
mInvFinalZoomScale = 1.0f / mActualScale;
mZoomScale = mActualScale;
if (!mInZoomOverview) {
mLastScale = scale;
}
invalidate();
return true;
} else {
return false;
}
}
/**
* Returns a view containing zoom controls i.e. +/- buttons. The caller is
* in charge of installing this view to the view hierarchy. This view will
* become visible when the user starts scrolling via touch and fade away if
* the user does not interact with it.
* <p/>
* API version 3 introduces a built-in zoom mechanism that is shown
* automatically by the MapView. This is the preferred approach for
* showing the zoom UI.
*
* @deprecated The built-in zoom mechanism is preferred, see
* {@link WebSettings#setBuiltInZoomControls(boolean)}.
*/
@Deprecated
public View getZoomControls() {
if (!getSettings().supportZoom()) {
Log.w(LOGTAG, "This WebView doesn't support zoom.");
return null;
}
if (mZoomControls == null) {
mZoomControls = createZoomControls();
/*
* need to be set to VISIBLE first so that getMeasuredHeight() in
* {@link #onSizeChanged()} can return the measured value for proper
* layout.
*/
mZoomControls.setVisibility(View.VISIBLE);
mZoomControlRunnable = new Runnable() {
public void run() {
/* Don't dismiss the controls if the user has
* focus on them. Wait and check again later.
*/
if (!mZoomControls.hasFocus()) {
mZoomControls.hide();
} else {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
}
}
};
}
return mZoomControls;
}
private ExtendedZoomControls createZoomControls() {
ExtendedZoomControls zoomControls = new ExtendedZoomControls(mContext
, null);
zoomControls.setOnZoomInClickListener(new OnClickListener() {
public void onClick(View v) {
// reset time out
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
zoomIn();
}
});
zoomControls.setOnZoomOutClickListener(new OnClickListener() {
public void onClick(View v) {
// reset time out
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
zoomOut();
}
});
zoomControls.setOnZoomMagnifyClickListener(new OnClickListener() {
public void onClick(View v) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
zoomScrollOut();
}
});
return zoomControls;
}
/**
* Gets the {@link ZoomButtonsController} which can be used to add
* additional buttons to the zoom controls window.
*
* @return The instance of {@link ZoomButtonsController} used by this class,
* or null if it is unavailable.
* @hide
*/
public ZoomButtonsController getZoomButtonsController() {
return mZoomButtonsController;
}
/**
* Perform zoom in in the webview
* @return TRUE if zoom in succeeds. FALSE if no zoom changes.
*/
public boolean zoomIn() {
// TODO: alternatively we can disallow this during draw history mode
switchOutDrawHistory();
// Center zooming to the center of the screen.
if (mInZoomOverview) {
// if in overview mode, bring it back to normal mode
mLastTouchX = getViewWidth() * .5f;
mLastTouchY = getViewHeight() * .5f;
doDoubleTap();
return true;
} else {
mZoomCenterX = getViewWidth() * .5f;
mZoomCenterY = getViewHeight() * .5f;
return zoomWithPreview(mActualScale * 1.25f);
}
}
/**
* Perform zoom out in the webview
* @return TRUE if zoom out succeeds. FALSE if no zoom changes.
*/
public boolean zoomOut() {
// TODO: alternatively we can disallow this during draw history mode
switchOutDrawHistory();
float scale = mActualScale * 0.8f;
if (scale < (mMinZoomScale + 0.1f) && WebView.ENABLE_DOUBLETAP_ZOOM
&& mWebViewCore.getSettings().getUseWideViewPort()) {
// when zoom out to min scale, switch to overview mode
doDoubleTap();
return true;
} else {
// Center zooming to the center of the screen.
mZoomCenterX = getViewWidth() * .5f;
mZoomCenterY = getViewHeight() * .5f;
return zoomWithPreview(scale);
}
}
private void updateSelection() {
if (mNativeClass == 0) {
return;
}
// mLastTouchX and mLastTouchY are the point in the current viewport
int contentX = viewToContent((int) mLastTouchX + mScrollX);
int contentY = viewToContent((int) mLastTouchY + mScrollY);
Rect rect = new Rect(contentX - mNavSlop, contentY - mNavSlop,
contentX + mNavSlop, contentY + mNavSlop);
nativeSelectBestAt(rect);
}
/**
* Scroll the focused text field/area to match the WebTextView
* @param x New x position of the WebTextView in view coordinates
* @param y New y position of the WebTextView in view coordinates
*/
/*package*/ void scrollFocusedTextInput(int x, int y) {
if (!inEditingMode() || mWebViewCore == null) {
return;
}
mWebViewCore.sendMessage(EventHub.SCROLL_TEXT_INPUT, viewToContent(x),
viewToContent(y));
}
/**
* Set our starting point and time for a drag from the WebTextView.
*/
/*package*/ void initiateTextFieldDrag(float x, float y, long eventTime) {
if (!inEditingMode()) {
return;
}
mLastTouchX = x + (float) (mWebTextView.getLeft() - mScrollX);
mLastTouchY = y + (float) (mWebTextView.getTop() - mScrollY);
mLastTouchTime = eventTime;
if (!mScroller.isFinished()) {
mScroller.abortAnimation();
mPrivateHandler.removeMessages(RESUME_WEBCORE_UPDATE);
}
mSnapScrollMode = SNAP_NONE;
mVelocityTracker = VelocityTracker.obtain();
mTouchMode = TOUCH_DRAG_START_MODE;
}
/**
* Given a motion event from the WebTextView, set its location to our
* coordinates, and handle the event.
*/
/*package*/ boolean textFieldDrag(MotionEvent event) {
if (!inEditingMode()) {
return false;
}
mDragFromTextInput = true;
event.offsetLocation((float) (mWebTextView.getLeft() - mScrollX),
(float) (mWebTextView.getTop() - mScrollY));
boolean result = onTouchEvent(event);
mDragFromTextInput = false;
return result;
}
/**
* Do a touch up from a WebTextView. This will be handled by webkit to
* change the selection.
* @param event MotionEvent in the WebTextView's coordinates.
*/
/*package*/ void touchUpOnTextField(MotionEvent event) {
if (!inEditingMode()) {
return;
}
int x = viewToContent((int) event.getX() + mWebTextView.getLeft());
int y = viewToContent((int) event.getY() + mWebTextView.getTop());
nativeTextInputMotionUp(x, y);
}
/*package*/ void shortPressOnTextField() {
if (inEditingMode()) {
View v = mWebTextView;
int x = viewToContent((v.getLeft() + v.getRight()) >> 1);
int y = viewToContent((v.getTop() + v.getBottom()) >> 1);
nativeTextInputMotionUp(x, y);
}
}
private void doShortPress() {
if (mNativeClass == 0) {
return;
}
switchOutDrawHistory();
// mLastTouchX and mLastTouchY are the point in the current viewport
int contentX = viewToContent((int) mLastTouchX + mScrollX);
int contentY = viewToContent((int) mLastTouchY + mScrollY);
if (nativeMotionUp(contentX, contentY, mNavSlop)) {
if (mLogEvent) {
Checkin.updateStats(mContext.getContentResolver(),
Checkin.Stats.Tag.BROWSER_SNAP_CENTER, 1, 0.0);
}
}
if (nativeHasCursorNode() && !nativeCursorIsTextInput()) {
playSoundEffect(SoundEffectConstants.CLICK);
}
}
private void doDoubleTap() {
if (mWebViewCore.getSettings().getUseWideViewPort() == false) {
return;
}
mZoomCenterX = mLastTouchX;
mZoomCenterY = mLastTouchY;
mInZoomOverview = !mInZoomOverview;
mCallbackProxy.uiOnChangeViewingMode(mInZoomOverview);
if (mInZoomOverview) {
if (getSettings().getBuiltInZoomControls()) {
if (mZoomButtonsController.isVisible()) {
mZoomButtonsController.setVisible(false);
}
} else {
if (mZoomControlRunnable != null) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
}
if (mZoomControls != null) {
mZoomControls.hide();
}
}
zoomWithPreview((float) getViewWidth() / mZoomOverviewWidth);
} else {
// mLastTouchX and mLastTouchY are the point in the current viewport
int contentX = viewToContent((int) mLastTouchX + mScrollX);
int contentY = viewToContent((int) mLastTouchY + mScrollY);
int left = nativeGetBlockLeftEdge(contentX, contentY, mActualScale);
if (left != NO_LEFTEDGE) {
// add a 5pt padding to the left edge. Re-calculate the zoom
// center so that the new scroll x will be on the left edge.
mZoomCenterX = left < 5 ? 0 : (left - 5) * mLastScale
* mActualScale / (mLastScale - mActualScale);
}
zoomWithPreview(mLastScale);
}
}
// Called by JNI to handle a touch on a node representing an email address,
// address, or phone number
private void overrideLoading(String url) {
mCallbackProxy.uiOverrideUrlLoading(url);
}
// called by JNI
private void sendPluginState(int state) {
WebViewCore.PluginStateData psd = new WebViewCore.PluginStateData();
psd.mFrame = nativeCursorFramePointer();
psd.mNode = nativeCursorNodePointer();
psd.mState = state;
mWebViewCore.sendMessage(EventHub.PLUGIN_STATE, psd);
}
@Override
public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
boolean result = false;
if (inEditingMode()) {
result = mWebTextView.requestFocus(direction,
previouslyFocusedRect);
} else {
result = super.requestFocus(direction, previouslyFocusedRect);
if (mWebViewCore.getSettings().getNeedInitialFocus()) {
// For cases such as GMail, where we gain focus from a direction,
// we want to move to the first available link.
// FIXME: If there are no visible links, we may not want to
int fakeKeyDirection = 0;
switch(direction) {
case View.FOCUS_UP:
fakeKeyDirection = KeyEvent.KEYCODE_DPAD_UP;
break;
case View.FOCUS_DOWN:
fakeKeyDirection = KeyEvent.KEYCODE_DPAD_DOWN;
break;
case View.FOCUS_LEFT:
fakeKeyDirection = KeyEvent.KEYCODE_DPAD_LEFT;
break;
case View.FOCUS_RIGHT:
fakeKeyDirection = KeyEvent.KEYCODE_DPAD_RIGHT;
break;
default:
return result;
}
if (mNativeClass != 0 && !nativeHasCursorNode()) {
navHandledKey(fakeKeyDirection, 1, true, 0, true);
}
}
}
return result;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int measuredHeight = heightSize;
int measuredWidth = widthSize;
// Grab the content size from WebViewCore.
int contentHeight = mContentHeight;
int contentWidth = mContentWidth;
// Log.d(LOGTAG, "------- measure " + heightMode);
if (heightMode != MeasureSpec.EXACTLY) {
mHeightCanMeasure = true;
measuredHeight = contentHeight;
if (heightMode == MeasureSpec.AT_MOST) {
// If we are larger than the AT_MOST height, then our height can
// no longer be measured and we should scroll internally.
if (measuredHeight > heightSize) {
measuredHeight = heightSize;
mHeightCanMeasure = false;
}
}
} else {
mHeightCanMeasure = false;
}
if (mNativeClass != 0) {
nativeSetHeightCanMeasure(mHeightCanMeasure);
}
// For the width, always use the given size unless unspecified.
if (widthMode == MeasureSpec.UNSPECIFIED) {
mWidthCanMeasure = true;
measuredWidth = contentWidth;
} else {
mWidthCanMeasure = false;
}
synchronized (this) {
setMeasuredDimension(measuredWidth, measuredHeight);
}
}
@Override
public boolean requestChildRectangleOnScreen(View child,
Rect rect,
boolean immediate) {
rect.offset(child.getLeft() - child.getScrollX(),
child.getTop() - child.getScrollY());
int height = getHeight() - getHorizontalScrollbarHeight();
int screenTop = mScrollY;
int screenBottom = screenTop + height;
int scrollYDelta = 0;
if (rect.bottom > screenBottom) {
int oneThirdOfScreenHeight = height / 3;
if (rect.height() > 2 * oneThirdOfScreenHeight) {
// If the rectangle is too tall to fit in the bottom two thirds
// of the screen, place it at the top.
scrollYDelta = rect.top - screenTop;
} else {
// If the rectangle will still fit on screen, we want its
// top to be in the top third of the screen.
scrollYDelta = rect.top - (screenTop + oneThirdOfScreenHeight);
}
} else if (rect.top < screenTop) {
scrollYDelta = rect.top - screenTop;
}
int width = getWidth() - getVerticalScrollbarWidth();
int screenLeft = mScrollX;
int screenRight = screenLeft + width;
int scrollXDelta = 0;
if (rect.right > screenRight && rect.left > screenLeft) {
if (rect.width() > width) {
scrollXDelta += (rect.left - screenLeft);
} else {
scrollXDelta += (rect.right - screenRight);
}
} else if (rect.left < screenLeft) {
scrollXDelta -= (screenLeft - rect.left);
}
if ((scrollYDelta | scrollXDelta) != 0) {
return pinScrollBy(scrollXDelta, scrollYDelta, !immediate, 0);
}
return false;
}
/* package */ void replaceTextfieldText(int oldStart, int oldEnd,
String replace, int newStart, int newEnd) {
WebViewCore.ReplaceTextData arg = new WebViewCore.ReplaceTextData();
arg.mReplace = replace;
arg.mNewStart = newStart;
arg.mNewEnd = newEnd;
mTextGeneration++;
arg.mTextGeneration = mTextGeneration;
mWebViewCore.sendMessage(EventHub.REPLACE_TEXT, oldStart, oldEnd, arg);
}
/* package */ void passToJavaScript(String currentText, KeyEvent event) {
if (nativeCursorWantsKeyEvents() && !nativeCursorMatchesFocus()) {
mWebViewCore.sendMessage(EventHub.CLICK);
}
WebViewCore.JSKeyData arg = new WebViewCore.JSKeyData();
arg.mEvent = event;
arg.mCurrentText = currentText;
// Increase our text generation number, and pass it to webcore thread
mTextGeneration++;
mWebViewCore.sendMessage(EventHub.PASS_TO_JS, mTextGeneration, 0, arg);
// WebKit's document state is not saved until about to leave the page.
// To make sure the host application, like Browser, has the up to date
// document state when it goes to background, we force to save the
// document state.
mWebViewCore.removeMessages(EventHub.SAVE_DOCUMENT_STATE);
mWebViewCore.sendMessageDelayed(EventHub.SAVE_DOCUMENT_STATE,
cursorData(), 1000);
}
/* package */ WebViewCore getWebViewCore() {
return mWebViewCore;
}
//-------------------------------------------------------------------------
// Methods can be called from a separate thread, like WebViewCore
// If it needs to call the View system, it has to send message.
//-------------------------------------------------------------------------
/**
* General handler to receive message coming from webkit thread
*/
class PrivateHandler extends Handler {
@Override
public void handleMessage(Message msg) {
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, msg.what < REMEMBER_PASSWORD || msg.what
> INVAL_RECT_MSG_ID ? Integer.toString(msg.what)
: HandlerDebugString[msg.what - REMEMBER_PASSWORD]);
}
switch (msg.what) {
case REMEMBER_PASSWORD: {
mDatabase.setUsernamePassword(
msg.getData().getString("host"),
msg.getData().getString("username"),
msg.getData().getString("password"));
((Message) msg.obj).sendToTarget();
break;
}
case NEVER_REMEMBER_PASSWORD: {
mDatabase.setUsernamePassword(
msg.getData().getString("host"), null, null);
((Message) msg.obj).sendToTarget();
break;
}
case SWITCH_TO_SHORTPRESS: {
if (mTouchMode == TOUCH_INIT_MODE) {
mTouchMode = TOUCH_SHORTPRESS_START_MODE;
updateSelection();
} else if (mTouchMode == TOUCH_DOUBLE_TAP_MODE) {
mTouchMode = TOUCH_DONE_MODE;
}
break;
}
case SWITCH_TO_LONGPRESS: {
if (!mPreventDrag) {
mTouchMode = TOUCH_DONE_MODE;
performLongClick();
rebuildWebTextView();
}
break;
}
case RELEASE_SINGLE_TAP: {
if (!mPreventDrag) {
mTouchMode = TOUCH_DONE_MODE;
doShortPress();
}
break;
}
case SWITCH_TO_CLICK:
// The user clicked with the trackball, and did not click a
// second time, so perform the action of a trackball single
// click
mTouchMode = TOUCH_DONE_MODE;
Rect visibleRect = sendOurVisibleRect();
// Note that sendOurVisibleRect calls viewToContent, so the
// coordinates should be in content coordinates.
if (!nativeCursorIntersects(visibleRect)) {
break;
}
nativeSetFollowedLink(true);
nativeUpdatePluginReceivesEvents();
WebViewCore.CursorData data = cursorData();
mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE, data);
playSoundEffect(SoundEffectConstants.CLICK);
boolean isTextInput = nativeCursorIsTextInput();
if (isTextInput || !mCallbackProxy.uiOverrideUrlLoading(
nativeCursorText())) {
mWebViewCore.sendMessage(EventHub.CLICK, data.mFrame,
nativeCursorNodePointer());
}
if (isTextInput) {
rebuildWebTextView();
}
break;
case SCROLL_BY_MSG_ID:
setContentScrollBy(msg.arg1, msg.arg2, (Boolean) msg.obj);
break;
case SYNC_SCROLL_TO_MSG_ID:
if (mUserScroll) {
// if user has scrolled explicitly, don't sync the
// scroll position any more
mUserScroll = false;
break;
}
// fall through
case SCROLL_TO_MSG_ID:
if (setContentScrollTo(msg.arg1, msg.arg2)) {
// if we can't scroll to the exact position due to pin,
// send a message to WebCore to re-scroll when we get a
// new picture
mUserScroll = false;
mWebViewCore.sendMessage(EventHub.SYNC_SCROLL,
msg.arg1, msg.arg2);
}
break;
case SPAWN_SCROLL_TO_MSG_ID:
spawnContentScrollTo(msg.arg1, msg.arg2);
break;
case NEW_PICTURE_MSG_ID: {
WebSettings settings = mWebViewCore.getSettings();
// called for new content
final int viewWidth = getViewWidth();
final WebViewCore.DrawData draw =
(WebViewCore.DrawData) msg.obj;
final Point viewSize = draw.mViewPoint;
boolean useWideViewport = settings.getUseWideViewPort();
WebViewCore.RestoreState restoreState = draw.mRestoreState;
if (restoreState != null) {
mInZoomOverview = false;
mLastScale = restoreState.mTextWrapScale;
if (restoreState.mMinScale == 0) {
mMinZoomScale = DEFAULT_MIN_ZOOM_SCALE;
mMinZoomScaleFixed = false;
} else {
mMinZoomScale = restoreState.mMinScale;
mMinZoomScaleFixed = true;
}
if (restoreState.mMaxScale == 0) {
mMaxZoomScale = DEFAULT_MAX_ZOOM_SCALE;
} else {
mMaxZoomScale = restoreState.mMaxScale;
}
if (useWideViewport && restoreState.mViewScale == 0) {
mInZoomOverview = ENABLE_DOUBLETAP_ZOOM
&& settings.getLoadWithOverviewMode();
}
mCallbackProxy.uiOnChangeViewingMode(true);
if (!mInZoomOverview) {
// We are going to start zoomed in. However, we
// truly want to show the title bar, and then hide
// it once the page has loaded
mCallbackProxy.uiChangeViewingModeOnFinishedLoad(
false, getOriginalUrl());
}
setNewZoomScale(mLastScale, false);
setContentScrollTo(restoreState.mScrollX,
restoreState.mScrollY);
// As we are on a new page, remove the WebTextView. This
// is necessary for page loads driven by webkit, and in
// particular when the user was on a password field, so
// the WebTextView was visible.
clearTextEntry();
}
// We update the layout (i.e. request a layout from the
// view system) if the last view size that we sent to
// WebCore matches the view size of the picture we just
// received in the fixed dimension.
final boolean updateLayout = viewSize.x == mLastWidthSent
&& viewSize.y == mLastHeightSent;
recordNewContentSize(draw.mWidthHeight.x,
draw.mWidthHeight.y, updateLayout);
if (DebugFlags.WEB_VIEW) {
Rect b = draw.mInvalRegion.getBounds();
Log.v(LOGTAG, "NEW_PICTURE_MSG_ID {" +
b.left+","+b.top+","+b.right+","+b.bottom+"}");
}
invalidate(contentToView(draw.mInvalRegion.getBounds()));
if (mPictureListener != null) {
mPictureListener.onNewPicture(WebView.this, capturePicture());
}
if (useWideViewport) {
mZoomOverviewWidth = Math.max(draw.mMinPrefWidth,
draw.mViewPoint.x);
}
if (!mMinZoomScaleFixed) {
mMinZoomScale = (float) viewWidth / mZoomOverviewWidth;
}
if (!mDrawHistory && mInZoomOverview) {
// fit the content width to the current view. Ignore
// the rounding error case.
if (Math.abs((viewWidth * mInvActualScale)
- mZoomOverviewWidth) > 1) {
setNewZoomScale((float) viewWidth
/ mZoomOverviewWidth, false);
}
}
break;
}
case WEBCORE_INITIALIZED_MSG_ID:
// nativeCreate sets mNativeClass to a non-zero value
nativeCreate(msg.arg1);
break;
case UPDATE_TEXTFIELD_TEXT_MSG_ID:
// Make sure that the textfield is currently focused
// and representing the same node as the pointer.
if (inEditingMode() &&
mWebTextView.isSameTextField(msg.arg1)) {
if (msg.getData().getBoolean("password")) {
Spannable text = (Spannable) mWebTextView.getText();
int start = Selection.getSelectionStart(text);
int end = Selection.getSelectionEnd(text);
mWebTextView.setInPassword(true);
// Restore the selection, which may have been
// ruined by setInPassword.
Spannable pword =
(Spannable) mWebTextView.getText();
Selection.setSelection(pword, start, end);
// If the text entry has created more events, ignore
// this one.
} else if (msg.arg2 == mTextGeneration) {
mWebTextView.setTextAndKeepSelection(
(String) msg.obj);
}
}
break;
case UPDATE_TEXT_SELECTION_MSG_ID:
if (inEditingMode()
&& mWebTextView.isSameTextField(msg.arg1)
&& msg.arg2 == mTextGeneration) {
WebViewCore.TextSelectionData tData
= (WebViewCore.TextSelectionData) msg.obj;
mWebTextView.setSelectionFromWebKit(tData.mStart,
tData.mEnd);
}
break;
case MOVE_OUT_OF_PLUGIN:
if (nativePluginEatsNavKey()) {
navHandledKey(msg.arg1, 1, false, 0, true);
}
break;
case UPDATE_TEXT_ENTRY_MSG_ID:
// this is sent after finishing resize in WebViewCore. Make
// sure the text edit box is still on the screen.
if (inEditingMode() && nativeCursorIsTextInput()) {
mWebTextView.bringIntoView();
rebuildWebTextView();
}
break;
case CLEAR_TEXT_ENTRY:
clearTextEntry();
break;
case INVAL_RECT_MSG_ID: {
Rect r = (Rect)msg.obj;
if (r == null) {
invalidate();
} else {
// we need to scale r from content into view coords,
// which viewInvalidate() does for us
viewInvalidate(r.left, r.top, r.right, r.bottom);
}
break;
}
case REQUEST_FORM_DATA:
AutoCompleteAdapter adapter = (AutoCompleteAdapter) msg.obj;
if (mWebTextView.isSameTextField(msg.arg1)) {
mWebTextView.setAdapterCustom(adapter);
}
break;
case UPDATE_CLIPBOARD:
String str = (String) msg.obj;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "UPDATE_CLIPBOARD " + str);
}
try {
IClipboard clip = IClipboard.Stub.asInterface(
ServiceManager.getService("clipboard"));
clip.setClipboardText(str);
} catch (android.os.RemoteException e) {
Log.e(LOGTAG, "Clipboard failed", e);
}
break;
case RESUME_WEBCORE_UPDATE:
WebViewCore.resumeUpdate(mWebViewCore);
break;
case LONG_PRESS_CENTER:
// as this is shared by keydown and trackballdown, reset all
// the states
mGotCenterDown = false;
mTrackballDown = false;
// LONG_PRESS_CENTER is sent as a delayed message. If we
// switch to windows overview, the WebView will be
// temporarily removed from the view system. In that case,
// do nothing.
if (getParent() != null) {
performLongClick();
}
break;
case WEBCORE_NEED_TOUCH_EVENTS:
mForwardTouchEvents = (msg.arg1 != 0);
break;
case PREVENT_TOUCH_ID:
if (msg.arg1 == MotionEvent.ACTION_DOWN) {
mPreventDrag = msg.arg2 == 1;
if (mPreventDrag) {
mTouchMode = TOUCH_DONE_MODE;
}
}
break;
case REQUEST_KEYBOARD:
if (msg.arg1 == 0) {
hideSoftKeyboard();
} else {
displaySoftKeyboard(false);
}
break;
default:
super.handleMessage(msg);
break;
}
}
}
// Class used to use a dropdown for a <select> element
private class InvokeListBox implements Runnable {
// Whether the listbox allows multiple selection.
private boolean mMultiple;
// Passed in to a list with multiple selection to tell
// which items are selected.
private int[] mSelectedArray;
// Passed in to a list with single selection to tell
// where the initial selection is.
private int mSelection;
private Container[] mContainers;
// Need these to provide stable ids to my ArrayAdapter,
// which normally does not have stable ids. (Bug 1250098)
private class Container extends Object {
String mString;
boolean mEnabled;
int mId;
public String toString() {
return mString;
}
}
/**
* Subclass ArrayAdapter so we can disable OptionGroupLabels,
* and allow filtering.
*/
private class MyArrayListAdapter extends ArrayAdapter<Container> {
public MyArrayListAdapter(Context context, Container[] objects, boolean multiple) {
super(context,
multiple ? com.android.internal.R.layout.select_dialog_multichoice :
com.android.internal.R.layout.select_dialog_singlechoice,
objects);
}
@Override
public boolean hasStableIds() {
// AdapterView's onChanged method uses this to determine whether
// to restore the old state. Return false so that the old (out
// of date) state does not replace the new, valid state.
return false;
}
private Container item(int position) {
if (position < 0 || position >= getCount()) {
return null;
}
return (Container) getItem(position);
}
@Override
public long getItemId(int position) {
Container item = item(position);
if (item == null) {
return -1;
}
return item.mId;
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
Container item = item(position);
if (item == null) {
return false;
}
return item.mEnabled;
}
}
private InvokeListBox(String[] array,
boolean[] enabled, int[] selected) {
mMultiple = true;
mSelectedArray = selected;
int length = array.length;
mContainers = new Container[length];
for (int i = 0; i < length; i++) {
mContainers[i] = new Container();
mContainers[i].mString = array[i];
mContainers[i].mEnabled = enabled[i];
mContainers[i].mId = i;
}
}
private InvokeListBox(String[] array, boolean[] enabled, int
selection) {
mSelection = selection;
mMultiple = false;
int length = array.length;
mContainers = new Container[length];
for (int i = 0; i < length; i++) {
mContainers[i] = new Container();
mContainers[i].mString = array[i];
mContainers[i].mEnabled = enabled[i];
mContainers[i].mId = i;
}
}
/*
* Whenever the data set changes due to filtering, this class ensures
* that the checked item remains checked.
*/
private class SingleDataSetObserver extends DataSetObserver {
private long mCheckedId;
private ListView mListView;
private Adapter mAdapter;
/*
* Create a new observer.
* @param id The ID of the item to keep checked.
* @param l ListView for getting and clearing the checked states
* @param a Adapter for getting the IDs
*/
public SingleDataSetObserver(long id, ListView l, Adapter a) {
mCheckedId = id;
mListView = l;
mAdapter = a;
}
public void onChanged() {
// The filter may have changed which item is checked. Find the
// item that the ListView thinks is checked.
int position = mListView.getCheckedItemPosition();
long id = mAdapter.getItemId(position);
if (mCheckedId != id) {
// Clear the ListView's idea of the checked item, since
// it is incorrect
mListView.clearChoices();
// Search for mCheckedId. If it is in the filtered list,
// mark it as checked
int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
if (mAdapter.getItemId(i) == mCheckedId) {
mListView.setItemChecked(i, true);
break;
}
}
}
}
public void onInvalidate() {}
}
public void run() {
final ListView listView = (ListView) LayoutInflater.from(mContext)
.inflate(com.android.internal.R.layout.select_dialog, null);
final MyArrayListAdapter adapter = new
MyArrayListAdapter(mContext, mContainers, mMultiple);
AlertDialog.Builder b = new AlertDialog.Builder(mContext)
.setView(listView).setCancelable(true)
.setInverseBackgroundForced(true);
if (mMultiple) {
b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
mWebViewCore.sendMessage(
EventHub.LISTBOX_CHOICES,
adapter.getCount(), 0,
listView.getCheckedItemPositions());
}});
b.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
mWebViewCore.sendMessage(
EventHub.SINGLE_LISTBOX_CHOICE, -2, 0);
}});
}
final AlertDialog dialog = b.create();
listView.setAdapter(adapter);
listView.setFocusableInTouchMode(true);
// There is a bug (1250103) where the checks in a ListView with
// multiple items selected are associated with the positions, not
// the ids, so the items do not properly retain their checks when
// filtered. Do not allow filtering on multiple lists until
// that bug is fixed.
listView.setTextFilterEnabled(!mMultiple);
if (mMultiple) {
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
int length = mSelectedArray.length;
for (int i = 0; i < length; i++) {
listView.setItemChecked(mSelectedArray[i], true);
}
} else {
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v,
int position, long id) {
mWebViewCore.sendMessage(
EventHub.SINGLE_LISTBOX_CHOICE, (int)id, 0);
dialog.dismiss();
}
});
if (mSelection != -1) {
listView.setSelection(mSelection);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setItemChecked(mSelection, true);
DataSetObserver observer = new SingleDataSetObserver(
adapter.getItemId(mSelection), listView, adapter);
adapter.registerDataSetObserver(observer);
}
}
dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface dialog) {
mWebViewCore.sendMessage(
EventHub.SINGLE_LISTBOX_CHOICE, -2, 0);
}
});
dialog.show();
}
}
/*
* Request a dropdown menu for a listbox with multiple selection.
*
* @param array Labels for the listbox.
* @param enabledArray Which positions are enabled.
* @param selectedArray Which positions are initally selected.
*/
void requestListBox(String[] array, boolean[]enabledArray, int[]
selectedArray) {
mPrivateHandler.post(
new InvokeListBox(array, enabledArray, selectedArray));
}
/*
* Request a dropdown menu for a listbox with single selection or a single
* <select> element.
*
* @param array Labels for the listbox.
* @param enabledArray Which positions are enabled.
* @param selection Which position is initally selected.
*/
void requestListBox(String[] array, boolean[]enabledArray, int selection) {
mPrivateHandler.post(
new InvokeListBox(array, enabledArray, selection));
}
// called by JNI
private void sendMoveMouse(int frame, int node, int x, int y) {
mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE,
new WebViewCore.CursorData(frame, node, x, y));
}
/*
* Send a mouse move event to the webcore thread.
*
* @param removeFocus Pass true if the "mouse" cursor is now over a node
* which wants key events, but it is not the focus. This
* will make the visual appear as though nothing is in
* focus. Remove the WebTextView, if present, and stop
* drawing the blinking caret.
* called by JNI
*/
private void sendMoveMouseIfLatest(boolean removeFocus) {
if (removeFocus) {
clearTextEntry();
setFocusControllerInactive();
}
mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE_IF_LATEST,
cursorData());
}
// called by JNI
private void sendMotionUp(int touchGeneration,
int frame, int node, int x, int y) {
WebViewCore.TouchUpData touchUpData = new WebViewCore.TouchUpData();
touchUpData.mMoveGeneration = touchGeneration;
touchUpData.mFrame = frame;
touchUpData.mNode = node;
touchUpData.mX = x;
touchUpData.mY = y;
mWebViewCore.sendMessage(EventHub.TOUCH_UP, touchUpData);
}
private int getScaledMaxXScroll() {
int width;
if (mHeightCanMeasure == false) {
width = getViewWidth() / 4;
} else {
Rect visRect = new Rect();
calcOurVisibleRect(visRect);
width = visRect.width() / 2;
}
// FIXME the divisor should be retrieved from somewhere
return viewToContent(width);
}
private int getScaledMaxYScroll() {
int height;
if (mHeightCanMeasure == false) {
height = getViewHeight() / 4;
} else {
Rect visRect = new Rect();
calcOurVisibleRect(visRect);
height = visRect.height() / 2;
}
// FIXME the divisor should be retrieved from somewhere
// the closest thing today is hard-coded into ScrollView.java
// (from ScrollView.java, line 363) int maxJump = height/2;
return viewToContent(height);
}
/**
* Called by JNI to invalidate view
*/
private void viewInvalidate() {
invalidate();
}
// return true if the key was handled
private boolean navHandledKey(int keyCode, int count, boolean noScroll,
long time, boolean ignorePlugin) {
if (mNativeClass == 0) {
return false;
}
if (ignorePlugin == false && nativePluginEatsNavKey()) {
KeyEvent event = new KeyEvent(time, time, KeyEvent.ACTION_DOWN
, keyCode, count, (mShiftIsPressed ? KeyEvent.META_SHIFT_ON : 0)
| (false ? KeyEvent.META_ALT_ON : 0) // FIXME
| (false ? KeyEvent.META_SYM_ON : 0) // FIXME
, 0, 0, 0);
mWebViewCore.sendMessage(EventHub.KEY_DOWN, event);
mWebViewCore.sendMessage(EventHub.KEY_UP, event);
return true;
}
mLastCursorTime = time;
mLastCursorBounds = nativeGetCursorRingBounds();
boolean keyHandled
= nativeMoveCursor(keyCode, count, noScroll) == false;
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "navHandledKey mLastCursorBounds=" + mLastCursorBounds
+ " mLastCursorTime=" + mLastCursorTime
+ " handled=" + keyHandled);
}
if (keyHandled == false || mHeightCanMeasure == false) {
return keyHandled;
}
Rect contentCursorRingBounds = nativeGetCursorRingBounds();
if (contentCursorRingBounds.isEmpty()) return keyHandled;
Rect viewCursorRingBounds = contentToView(contentCursorRingBounds);
Rect visRect = new Rect();
calcOurVisibleRect(visRect);
Rect outset = new Rect(visRect);
int maxXScroll = visRect.width() / 2;
int maxYScroll = visRect.height() / 2;
outset.inset(-maxXScroll, -maxYScroll);
if (Rect.intersects(outset, viewCursorRingBounds) == false) {
return keyHandled;
}
// FIXME: Necessary because ScrollView/ListView do not scroll left/right
int maxH = Math.min(viewCursorRingBounds.right - visRect.right,
maxXScroll);
if (maxH > 0) {
pinScrollBy(maxH, 0, true, 0);
} else {
maxH = Math.max(viewCursorRingBounds.left - visRect.left,
-maxXScroll);
if (maxH < 0) {
pinScrollBy(maxH, 0, true, 0);
}
}
if (mLastCursorBounds.isEmpty()) return keyHandled;
if (mLastCursorBounds.equals(contentCursorRingBounds)) {
return keyHandled;
}
if (DebugFlags.WEB_VIEW) {
Log.v(LOGTAG, "navHandledKey contentCursorRingBounds="
+ contentCursorRingBounds);
}
requestRectangleOnScreen(viewCursorRingBounds);
mUserScroll = true;
return keyHandled;
}
/**
* Set the background color. It's white by default. Pass
* zero to make the view transparent.
* @param color the ARGB color described by Color.java
*/
public void setBackgroundColor(int color) {
mBackgroundColor = color;
mWebViewCore.sendMessage(EventHub.SET_BACKGROUND_COLOR, color);
}
public void debugDump() {
nativeDebugDump();
mWebViewCore.sendMessage(EventHub.DUMP_NAVTREE);
}
/**
* Update our cache with updatedText.
* @param updatedText The new text to put in our cache.
*/
/* package */ void updateCachedTextfield(String updatedText) {
// Also place our generation number so that when we look at the cache
// we recognize that it is up to date.
nativeUpdateCachedTextfield(updatedText, mTextGeneration);
}
/* package */ native void nativeClearCursor();
private native void nativeCreate(int ptr);
private native int nativeCursorFramePointer();
private native Rect nativeCursorNodeBounds();
/* package */ native int nativeCursorNodePointer();
/* package */ native boolean nativeCursorMatchesFocus();
private native boolean nativeCursorIntersects(Rect visibleRect);
private native boolean nativeCursorIsAnchor();
private native boolean nativeCursorIsPlugin();
private native boolean nativeCursorIsTextInput();
private native Point nativeCursorPosition();
private native String nativeCursorText();
/**
* Returns true if the native cursor node says it wants to handle key events
* (ala plugins). This can only be called if mNativeClass is non-zero!
*/
private native boolean nativeCursorWantsKeyEvents();
private native void nativeDebugDump();
private native void nativeDestroy();
private native void nativeDrawCursorRing(Canvas content);
private native void nativeDrawMatches(Canvas canvas);
private native void nativeDrawSelection(Canvas content
, int x, int y, boolean extendSelection);
private native void nativeDrawSelectionRegion(Canvas content);
private native void nativeDumpDisplayTree(String urlOrNull);
private native int nativeFindAll(String findLower, String findUpper);
private native void nativeFindNext(boolean forward);
private native boolean nativeFocusCandidateIsPassword();
private native boolean nativeFocusCandidateIsRtlText();
private native boolean nativeFocusCandidateIsTextField();
private native boolean nativeFocusCandidateIsTextInput();
private native int nativeFocusCandidateMaxLength();
/* package */ native String nativeFocusCandidateName();
private native Rect nativeFocusCandidateNodeBounds();
/* package */ native int nativeFocusCandidatePointer();
private native String nativeFocusCandidateText();
private native int nativeFocusCandidateTextSize();
/* package */ native int nativeFocusNodePointer();
private native Rect nativeGetCursorRingBounds();
private native Region nativeGetSelection();
private native boolean nativeHasCursorNode();
private native boolean nativeHasFocusNode();
private native void nativeHideCursor();
private native String nativeImageURI(int x, int y);
private native void nativeInstrumentReport();
/* package */ native void nativeMoveCursorToNextTextInput();
// return true if the page has been scrolled
private native boolean nativeMotionUp(int x, int y, int slop);
// returns false if it handled the key
private native boolean nativeMoveCursor(int keyCode, int count,
boolean noScroll);
private native int nativeMoveGeneration();
private native void nativeMoveSelection(int x, int y,
boolean extendSelection);
private native boolean nativePluginEatsNavKey();
// Like many other of our native methods, you must make sure that
// mNativeClass is not null before calling this method.
private native void nativeRecordButtons(boolean focused,
boolean pressed, boolean invalidate);
private native void nativeSelectBestAt(Rect rect);
private native void nativeSetFindIsDown();
private native void nativeSetFollowedLink(boolean followed);
private native void nativeSetHeightCanMeasure(boolean measure);
// Returns a value corresponding to CachedFrame::ImeAction
/* package */ native int nativeTextFieldAction();
/**
* Perform a click on a currently focused text input. Since it is already
* focused, there is no need to go through the nativeMotionUp code, which
* may change the Cursor.
*/
private native void nativeTextInputMotionUp(int x, int y);
private native int nativeTextGeneration();
// Never call this version except by updateCachedTextfield(String) -
// we always want to pass in our generation number.
private native void nativeUpdateCachedTextfield(String updatedText,
int generation);
private native void nativeUpdatePluginReceivesEvents();
// return NO_LEFTEDGE means failure.
private static final int NO_LEFTEDGE = -1;
private native int nativeGetBlockLeftEdge(int x, int y, float scale);
}