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/*
* Copyright (C) 2012 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.content.Context;
import android.os.Handler;
import android.os.Message;
import android.text.Editable;
import android.view.KeyEvent;
import android.view.View;
import android.widget.AbsoluteLayout;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ListAdapter;
import android.widget.ListPopupWindow;
import android.widget.PopupWindow.OnDismissListener;
class AutoCompletePopup implements OnItemClickListener, Filter.FilterListener,
OnDismissListener{
private static class AnchorView extends View {
AnchorView(Context context) {
super(context);
setFocusable(false);
setVisibility(INVISIBLE);
}
}
private static final int AUTOFILL_FORM = 100;
private boolean mIsAutoFillProfileSet;
private Handler mHandler;
private int mQueryId;
private ListPopupWindow mPopup;
private Filter mFilter;
private CharSequence mText;
private ListAdapter mAdapter;
private View mAnchor;
private WebViewClassic.WebViewInputConnection mInputConnection;
private WebViewClassic mWebView;
public AutoCompletePopup(WebViewClassic webView,
WebViewClassic.WebViewInputConnection inputConnection) {
mInputConnection = inputConnection;
mWebView = webView;
mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case AUTOFILL_FORM:
mWebView.autoFillForm(mQueryId);
break;
}
}
};
}
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
if (mPopup == null) {
return false;
}
if (keyCode == KeyEvent.KEYCODE_BACK && mPopup.isShowing()) {
// special case for the back key, we do not even try to send it
// to the drop down list but instead, consume it immediately
if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
KeyEvent.DispatcherState state = mAnchor.getKeyDispatcherState();
if (state != null) {
state.startTracking(event, this);
}
return true;
} else if (event.getAction() == KeyEvent.ACTION_UP) {
KeyEvent.DispatcherState state = mAnchor.getKeyDispatcherState();
if (state != null) {
state.handleUpEvent(event);
}
if (event.isTracking() && !event.isCanceled()) {
mPopup.dismiss();
return true;
}
}
}
if (mPopup.isShowing()) {
return mPopup.onKeyPreIme(keyCode, event);
}
return false;
}
public void setText(CharSequence text) {
mText = text;
if (mFilter != null) {
mFilter.filter(text, this);
}
}
public void setAutoFillQueryId(int queryId) {
mQueryId = queryId;
}
public void clearAdapter() {
mAdapter = null;
mFilter = null;
if (mPopup != null) {
mPopup.dismiss();
mPopup.setAdapter(null);
}
}
public <T extends ListAdapter & Filterable> void setAdapter(T adapter) {
ensurePopup();
mPopup.setAdapter(adapter);
mAdapter = adapter;
if (adapter != null) {
mFilter = adapter.getFilter();
mFilter.filter(mText, this);
} else {
mFilter = null;
}
resetRect();
}
public void resetRect() {
ensurePopup();
int left = mWebView.contentToViewX(mWebView.mEditTextContentBounds.left);
int right = mWebView.contentToViewX(mWebView.mEditTextContentBounds.right);
int width = right - left;
mPopup.setWidth(width);
int bottom = mWebView.contentToViewY(mWebView.mEditTextContentBounds.bottom);
int top = mWebView.contentToViewY(mWebView.mEditTextContentBounds.top);
int height = bottom - top;
AbsoluteLayout.LayoutParams lp =
(AbsoluteLayout.LayoutParams) mAnchor.getLayoutParams();
boolean needsUpdate = false;
if (null == lp) {
lp = new AbsoluteLayout.LayoutParams(width, height, left, top);
} else {
if ((lp.x != left) || (lp.y != top) || (lp.width != width)
|| (lp.height != height)) {
needsUpdate = true;
lp.x = left;
lp.y = top;
lp.width = width;
lp.height = height;
}
}
if (needsUpdate) {
mAnchor.setLayoutParams(lp);
}
if (mPopup.isShowing()) {
mPopup.show(); // update its position
}
}
// AdapterView.OnItemClickListener implementation
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (mPopup == null) {
return;
}
if (id == 0 && position == 0 && mInputConnection.getIsAutoFillable()) {
mText = "";
pushTextToInputConnection();
// Blank out the text box while we wait for WebCore to fill the form.
if (mIsAutoFillProfileSet) {
// Call a webview method to tell WebCore to autofill the form.
mWebView.autoFillForm(mQueryId);
} else {
// There is no autofill profile setup yet and the user has
// elected to try and set one up. Call through to the
// embedder to action that.
WebChromeClient webChromeClient = mWebView.getWebChromeClient();
if (webChromeClient != null) {
webChromeClient.setupAutoFill(
mHandler.obtainMessage(AUTOFILL_FORM));
}
}
} else {
Object selectedItem;
if (position < 0) {
selectedItem = mPopup.getSelectedItem();
} else {
selectedItem = mAdapter.getItem(position);
}
if (selectedItem != null) {
setText(mFilter.convertResultToString(selectedItem));
pushTextToInputConnection();
}
}
mPopup.dismiss();
}
public void setIsAutoFillProfileSet(boolean isAutoFillProfileSet) {
mIsAutoFillProfileSet = isAutoFillProfileSet;
}
private void pushTextToInputConnection() {
Editable oldText = mInputConnection.getEditable();
mInputConnection.setSelection(0, oldText.length());
mInputConnection.replaceSelection(mText);
mInputConnection.setSelection(mText.length(), mText.length());
}
@Override
public void onFilterComplete(int count) {
ensurePopup();
boolean showDropDown = (count > 0) &&
(mInputConnection.getIsAutoFillable() || mText.length() > 0);
if (showDropDown) {
if (!mPopup.isShowing()) {
// Make sure the list does not obscure the IME when shown for the first time.
mPopup.setInputMethodMode(ListPopupWindow.INPUT_METHOD_NEEDED);
}
mPopup.show();
mPopup.getListView().setOverScrollMode(View.OVER_SCROLL_ALWAYS);
} else {
mPopup.dismiss();
}
}
@Override
public void onDismiss() {
mWebView.getWebView().removeView(mAnchor);
}
private void ensurePopup() {
if (mPopup == null) {
mPopup = new ListPopupWindow(mWebView.getContext());
mAnchor = new AnchorView(mWebView.getContext());
mWebView.getWebView().addView(mAnchor);
mPopup.setOnItemClickListener(this);
mPopup.setAnchorView(mAnchor);
mPopup.setPromptPosition(ListPopupWindow.POSITION_PROMPT_BELOW);
} else if (mWebView.getWebView().indexOfChild(mAnchor) < 0) {
mWebView.getWebView().addView(mAnchor);
}
}
}
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