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/*
* Copyright (C) 2010 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 com.android.browser;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.provider.Browser;
import android.util.Log;
import android.webkit.WebView;
import java.net.URISyntaxException;
import java.util.List;
import java.util.regex.Matcher;
/**
*
*/
public class UrlHandler {
// Use in overrideUrlLoading
/* package */ final static String SCHEME_WTAI = "wtai://wp/";
/* package */ final static String SCHEME_WTAI_MC = "wtai://wp/mc;";
/* package */ final static String SCHEME_WTAI_SD = "wtai://wp/sd;";
/* package */ final static String SCHEME_WTAI_AP = "wtai://wp/ap;";
Controller mController;
Activity mActivity;
public UrlHandler(Controller controller) {
mController = controller;
mActivity = mController.getActivity();
}
boolean shouldOverrideUrlLoading(Tab tab, WebView view, String url) {
if (view.isPrivateBrowsingEnabled()) {
// Don't allow urls to leave the browser app when in
// private browsing mode
return false;
}
if (url.startsWith(SCHEME_WTAI)) {
// wtai://wp/mc;number
// number=string(phone-number)
if (url.startsWith(SCHEME_WTAI_MC)) {
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(WebView.SCHEME_TEL +
url.substring(SCHEME_WTAI_MC.length())));
mActivity.startActivity(intent);
// before leaving BrowserActivity, close the empty child tab.
// If a new tab is created through JavaScript open to load this
// url, we would like to close it as we will load this url in a
// different Activity.
mController.closeEmptyTab();
return true;
}
// wtai://wp/sd;dtmf
// dtmf=string(dialstring)
if (url.startsWith(SCHEME_WTAI_SD)) {
// TODO: only send when there is active voice connection
return false;
}
// wtai://wp/ap;number;name
// number=string(phone-number)
// name=string
if (url.startsWith(SCHEME_WTAI_AP)) {
// TODO
return false;
}
}
// The "about:" schemes are internal to the browser; don't want these to
// be dispatched to other apps.
if (url.startsWith("about:")) {
return false;
}
if (startActivityForUrl(tab, url)) {
return true;
}
if (handleMenuClick(tab, url)) {
return true;
}
return false;
}
boolean startActivityForUrl(Tab tab, String url) {
Intent intent;
// perform generic parsing of the URI to turn it into an Intent.
try {
intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
} catch (URISyntaxException ex) {
Log.w("Browser", "Bad URI " + url + ": " + ex.getMessage());
return false;
}
// check whether the intent can be resolved. If not, we will see
// whether we can download it from the Market.
ResolveInfo r = null;
try {
r = mActivity.getPackageManager().resolveActivity(intent, 0);
} catch (Exception e) {
return false;
}
if (r == null) {
String packagename = intent.getPackage();
if (packagename != null) {
intent = new Intent(Intent.ACTION_VIEW, Uri
.parse("market://search?q=pname:" + packagename));
intent.addCategory(Intent.CATEGORY_BROWSABLE);
try {
mActivity.startActivity(intent);
// before leaving BrowserActivity, close the empty child tab.
// If a new tab is created through JavaScript open to load this
// url, we would like to close it as we will load this url in a
// different Activity.
mController.closeEmptyTab();
return true;
} catch (ActivityNotFoundException e) {
Log.w("Browser", "No activity found to handle " + url);
return false;
}
} else {
return false;
}
}
// sanitize the Intent, ensuring web pages can not bypass browser
// security (only access to BROWSABLE activities).
intent.addCategory(Intent.CATEGORY_BROWSABLE);
intent.setComponent(null);
Intent selector = intent.getSelector();
if (selector != null) {
selector.addCategory(Intent.CATEGORY_BROWSABLE);
selector.setComponent(null);
}
// Re-use the existing tab if the intent comes back to us
if (tab != null) {
if (tab.getAppId() == null) {
tab.setAppId(mActivity.getPackageName() + "-" + tab.getId());
}
intent.putExtra(Browser.EXTRA_APPLICATION_ID, tab.getAppId());
}
// Make sure webkit can handle it internally before checking for specialized
// handlers. If webkit can't handle it internally, we need to call
// startActivityIfNeeded
Matcher m = UrlUtils.ACCEPTED_URI_SCHEMA.matcher(url);
if (m.matches() && !isSpecializedHandlerAvailable(intent)) {
return false;
}
try {
intent.putExtra(BrowserActivity.EXTRA_DISABLE_URL_OVERRIDE, true);
if (mActivity.startActivityIfNeeded(intent, -1)) {
// before leaving BrowserActivity, close the empty child tab.
// If a new tab is created through JavaScript open to load this
// url, we would like to close it as we will load this url in a
// different Activity.
mController.closeEmptyTab();
return true;
}
} catch (ActivityNotFoundException ex) {
// ignore the error. If no application can handle the URL,
// eg about:blank, assume the browser can handle it.
}
return false;
}
/**
* Search for intent handlers that are specific to this URL
* aka, specialized apps like google maps or youtube
*/
private boolean isSpecializedHandlerAvailable(Intent intent) {
PackageManager pm = mActivity.getPackageManager();
List<ResolveInfo> handlers = pm.queryIntentActivities(intent,
PackageManager.GET_RESOLVED_FILTER);
if (handlers == null || handlers.size() == 0) {
return false;
}
for (ResolveInfo resolveInfo : handlers) {
IntentFilter filter = resolveInfo.filter;
if (filter == null) {
// No intent filter matches this intent?
// Error on the side of staying in the browser, ignore
continue;
}
if (filter.countDataAuthorities() == 0 && filter.countDataPaths() == 0) {
// Generic handler, skip
continue;
}
return true;
}
return false;
}
// In case a physical keyboard is attached, handle clicks with the menu key
// depressed by opening in a new tab
boolean handleMenuClick(Tab tab, String url) {
if (mController.isMenuDown()) {
mController.openTab(url,
(tab != null) && tab.isPrivateBrowsingEnabled(),
!BrowserSettings.getInstance().openInBackground(), true);
mActivity.closeOptionsMenu();
return true;
}
return false;
}
}
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