/WebVox/src/com/marvin/webvox/TabControl.java
http://eyes-free.googlecode.com/ · Java · 1324 lines · 828 code · 115 blank · 381 comment · 224 complexity · 27e94971d75802ce457ab33c7bf2d2df MD5 · raw file
- /*
- * Copyright (C) 2007 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.marvin.webvox;
- import com.marvin.webvox.R;
- import android.content.Context;
- import android.graphics.Bitmap;
- import android.graphics.Picture;
- //import android.net.http.SslError;
- import android.os.Bundle;
- import android.os.Message;
- import android.util.Log;
- import android.view.Gravity;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.view.View.OnClickListener;
- import android.webkit.HttpAuthHandler;
- import android.webkit.JsPromptResult;
- import android.webkit.JsResult;
- import android.webkit.SslErrorHandler;
- import android.webkit.WebBackForwardList;
- import android.webkit.WebChromeClient;
- import android.webkit.WebHistoryItem;
- import android.webkit.WebView;
- import android.webkit.WebViewClient;
- import android.widget.FrameLayout;
- import android.widget.ImageButton;
- import android.widget.LinearLayout;
- import java.io.File;
- import java.io.FileInputStream;
- import java.util.ArrayList;
- import java.util.Vector;
- class TabControl {
- // Log Tag
- private static final String LOGTAG = "TabControl";
- // Maximum number of tabs.
- static final int MAX_TABS = 8;
- // Static instance of an empty callback.
- private static final WebViewClient mEmptyClient =
- new WebViewClient();
- // Instance of BackgroundChromeClient for background tabs.
- private final BackgroundChromeClient mBackgroundChromeClient =
- new BackgroundChromeClient();
- // Private array of WebViews that are used as tabs.
- private ArrayList<Tab> mTabs = new ArrayList<Tab>(MAX_TABS);
- // Queue of most recently viewed tabs.
- private ArrayList<Tab> mTabQueue = new ArrayList<Tab>(MAX_TABS);
- // Current position in mTabs.
- private int mCurrentTab = -1;
- // A private instance of BrowserActivity to interface with when adding and
- // switching between tabs.
- private final BrowserActivity mActivity;
- // Inflation service for making subwindows.
- private final LayoutInflater mInflateService;
- // Subclass of WebViewClient used in subwindows to notify the main
- // WebViewClient of certain WebView activities.
- private static class SubWindowClient extends WebViewClient {
- // The main WebViewClient.
- private final WebViewClient mClient;
- SubWindowClient(WebViewClient client) {
- mClient = client;
- }
- @Override
- public void doUpdateVisitedHistory(WebView view, String url,
- boolean isReload) {
- mClient.doUpdateVisitedHistory(view, url, isReload);
- }
- @Override
- public boolean shouldOverrideUrlLoading(WebView view, String url) {
- return mClient.shouldOverrideUrlLoading(view, url);
- }
- // @Override
- // public void onReceivedSslError(WebView view, SslErrorHandler handler,
- // SslError error) {
- // mClient.onReceivedSslError(view, handler, error);
- // }
- @Override
- public void onReceivedHttpAuthRequest(WebView view,
- HttpAuthHandler handler, String host, String realm) {
- mClient.onReceivedHttpAuthRequest(view, handler, host, realm);
- }
- @Override
- public void onFormResubmission(WebView view, Message dontResend,
- Message resend) {
- mClient.onFormResubmission(view, dontResend, resend);
- }
- @Override
- public void onReceivedError(WebView view, int errorCode,
- String description, String failingUrl) {
- mClient.onReceivedError(view, errorCode, description, failingUrl);
- }
- @Override
- public boolean shouldOverrideKeyEvent(WebView view,
- android.view.KeyEvent event) {
- return mClient.shouldOverrideKeyEvent(view, event);
- }
- @Override
- public void onUnhandledKeyEvent(WebView view,
- android.view.KeyEvent event) {
- mClient.onUnhandledKeyEvent(view, event);
- }
- }
- // Subclass of WebChromeClient to display javascript dialogs.
- private class SubWindowChromeClient extends WebChromeClient {
- // This subwindow's tab.
- private final Tab mTab;
- // The main WebChromeClient.
- private final WebChromeClient mClient;
- SubWindowChromeClient(Tab t, WebChromeClient client) {
- mTab = t;
- mClient = client;
- }
- @Override
- public void onProgressChanged(WebView view, int newProgress) {
- mClient.onProgressChanged(view, newProgress);
- }
- @Override
- public boolean onCreateWindow(WebView view, boolean dialog,
- boolean userGesture, android.os.Message resultMsg) {
- return mClient.onCreateWindow(view, dialog, userGesture, resultMsg);
- }
- @Override
- public void onCloseWindow(WebView window) {
- if (Browser.DEBUG && window != mTab.mSubView) {
- throw new AssertionError("Can't close the window");
- }
- mActivity.dismissSubWindow(mTab);
- }
- }
- // Background WebChromeClient for focusing tabs
- private class BackgroundChromeClient extends WebChromeClient {
- @Override
- public void onRequestFocus(WebView view) {
- Tab t = getTabFromView(view);
- if (t != getCurrentTab()) {
- mActivity.switchToTab(getTabIndex(t));
- }
- }
- }
- // Extra saved information for displaying the tab in the picker.
- public static class PickerData {
- String mUrl;
- String mTitle;
- Bitmap mFavicon;
- float mScale;
- int mScrollX;
- int mScrollY;
- }
- /**
- * Private class for maintaining Tabs with a main WebView and a subwindow.
- */
- public class Tab {
- // The Geolocation permissions prompt
- private GeolocationPermissionsPrompt mGeolocationPermissionsPrompt;
- private View mContainer;
- // Main WebView
- private WebView mMainView;
- // Subwindow WebView
- private WebView mSubView;
- // Subwindow container
- private View mSubViewContainer;
- // Subwindow callback
- private SubWindowClient mSubViewClient;
- // Subwindow chrome callback
- private SubWindowChromeClient mSubViewChromeClient;
- // Saved bundle for when we are running low on memory. It contains the
- // information needed to restore the WebView if the user goes back to
- // the tab.
- private Bundle mSavedState;
- // Data used when displaying the tab in the picker.
- private PickerData mPickerData;
- // Parent Tab. This is the Tab that created this Tab, or null
- // if the Tab was created by the UI
- private Tab mParentTab;
- // Tab that constructed by this Tab. This is used when this
- // Tab is destroyed, it clears all mParentTab values in the
- // children.
- private Vector<Tab> mChildTabs;
- private Boolean mCloseOnExit;
- // Application identifier used to find tabs that another application
- // wants to reuse.
- private String mAppId;
- // Keep the original url around to avoid killing the old WebView if the
- // url has not changed.
- private String mOriginalUrl;
- private ErrorConsoleView mErrorConsole;
- // the lock icon type and previous lock icon type for the tab
- private int mSavedLockIconType;
- private int mSavedPrevLockIconType;
- // Construct a new tab
- private Tab(WebView w, boolean closeOnExit, String appId, String url, Context context) {
- mCloseOnExit = closeOnExit;
- mAppId = appId;
- mOriginalUrl = url;
- mSavedLockIconType = BrowserActivity.LOCK_ICON_UNSECURE;
- mSavedPrevLockIconType = BrowserActivity.LOCK_ICON_UNSECURE;
- // The tab consists of a container view, which contains the main
- // WebView, as well as any other UI elements associated with the tab.
- LayoutInflater factory = LayoutInflater.from(context);
- mContainer = factory.inflate(R.layout.tab, null);
- // mGeolocationPermissionsPrompt =
- // (GeolocationPermissionsPrompt) mContainer.findViewById(
- // R.id.geolocation_permissions_prompt);
- setWebView(w);
- }
- /**
- * Sets the WebView for this tab, correctly removing the old WebView
- * from the container view.
- */
- public void setWebView(WebView w) {
- if (mMainView == w) {
- return;
- }
- // If the WebView is changing, the page will be reloaded, so any ongoing Geolocation
- // permission requests are void.
- //mGeolocationPermissionsPrompt.hide();
- // Just remove the old one.
- FrameLayout wrapper =
- (FrameLayout) mContainer.findViewById(R.id.webview_wrapper);
- wrapper.removeView(mMainView);
- mMainView = w;
- }
- /**
- * This method attaches both the WebView and any sub window to the
- * given content view.
- */
- public void attachTabToContentView(ViewGroup content) {
- if (mMainView == null) {
- return;
- }
- // Attach the WebView to the container and then attach the
- // container to the content view.
- FrameLayout wrapper =
- (FrameLayout) mContainer.findViewById(R.id.webview_wrapper);
- wrapper.addView(mMainView);
- content.addView(mContainer, BrowserActivity.COVER_SCREEN_PARAMS);
- attachSubWindow(content);
- }
- /**
- * Remove the WebView and any sub window from the given content view.
- */
- public void removeTabFromContentView(ViewGroup content) {
- if (mMainView == null) {
- return;
- }
- // Remove the container from the content and then remove the
- // WebView from the container. This will trigger a focus change
- // needed by WebView.
- FrameLayout wrapper =
- (FrameLayout) mContainer.findViewById(R.id.webview_wrapper);
- wrapper.removeView(mMainView);
- content.removeView(mContainer);
- removeSubWindow(content);
- }
- /**
- * Attach the sub window to the content view.
- */
- public void attachSubWindow(ViewGroup content) {
- if (mSubView != null) {
- content.addView(mSubViewContainer,
- BrowserActivity.COVER_SCREEN_PARAMS);
- }
- }
- /**
- * Remove the sub window from the content view.
- */
- public void removeSubWindow(ViewGroup content) {
- if (mSubView != null) {
- content.removeView(mSubViewContainer);
- }
- }
- /**
- * Return the top window of this tab; either the subwindow if it is not
- * null or the main window.
- * @return The top window of this tab.
- */
- public WebView getTopWindow() {
- if (mSubView != null) {
- return mSubView;
- }
- return mMainView;
- }
- /**
- * Return the main window of this tab. Note: if a tab is freed in the
- * background, this can return null. It is only guaranteed to be
- * non-null for the current tab.
- * @return The main WebView of this tab.
- */
- public WebView getWebView() {
- return mMainView;
- }
- /**
- * @return The geolocation permissions prompt for this tab.
- */
- public GeolocationPermissionsPrompt getGeolocationPermissionsPrompt() {
- return mGeolocationPermissionsPrompt;
- }
- /**
- * Return the subwindow of this tab or null if there is no subwindow.
- * @return The subwindow of this tab or null.
- */
- public WebView getSubWebView() {
- return mSubView;
- }
- /**
- * Get the url of this tab. Valid after calling populatePickerData, but
- * before calling wipePickerData, or if the webview has been destroyed.
- *
- * @return The WebView's url or null.
- */
- public String getUrl() {
- if (mPickerData != null) {
- return mPickerData.mUrl;
- }
- return null;
- }
- /**
- * Get the title of this tab. Valid after calling populatePickerData,
- * but before calling wipePickerData, or if the webview has been
- * destroyed. If the url has no title, use the url instead.
- *
- * @return The WebView's title (or url) or null.
- */
- public String getTitle() {
- if (mPickerData != null) {
- return mPickerData.mTitle;
- }
- return null;
- }
- public Bitmap getFavicon() {
- if (mPickerData != null) {
- return mPickerData.mFavicon;
- }
- return null;
- }
- private void setParentTab(Tab parent) {
- mParentTab = parent;
- // This tab may have been freed due to low memory. If that is the
- // case, the parent tab index is already saved. If we are changing
- // that index (most likely due to removing the parent tab) we must
- // update the parent tab index in the saved Bundle.
- if (mSavedState != null) {
- if (parent == null) {
- mSavedState.remove(PARENTTAB);
- } else {
- mSavedState.putInt(PARENTTAB, getTabIndex(parent));
- }
- }
- }
-
- /**
- * When a Tab is created through the content of another Tab, then
- * we associate the Tabs.
- * @param child the Tab that was created from this Tab
- */
- public void addChildTab(Tab child) {
- if (mChildTabs == null) {
- mChildTabs = new Vector<Tab>();
- }
- mChildTabs.add(child);
- child.setParentTab(this);
- }
-
- private void removeFromTree() {
- // detach the children
- if (mChildTabs != null) {
- for(Tab t : mChildTabs) {
- t.setParentTab(null);
- }
- }
-
- // Find myself in my parent list
- if (mParentTab != null) {
- mParentTab.mChildTabs.remove(this);
- }
- }
-
- /**
- * If this Tab was created through another Tab, then this method
- * returns that Tab.
- * @return the Tab parent or null
- */
- public Tab getParentTab() {
- return mParentTab;
- }
- /**
- * Return whether this tab should be closed when it is backing out of
- * the first page.
- * @return TRUE if this tab should be closed when exit.
- */
- public boolean closeOnExit() {
- return mCloseOnExit;
- }
- void setLockIconType(int type) {
- mSavedLockIconType = type;
- }
- int getLockIconType() {
- return mSavedLockIconType;
- }
- void setPrevLockIconType(int type) {
- mSavedPrevLockIconType = type;
- }
- int getPrevLockIconType() {
- return mSavedPrevLockIconType;
- }
- };
- // Directory to store thumbnails for each WebView.
- private final File mThumbnailDir;
- /**
- * Construct a new TabControl object that interfaces with the given
- * BrowserActivity instance.
- * @param activity A BrowserActivity instance that TabControl will interface
- * with.
- */
- TabControl(BrowserActivity activity) {
- mActivity = activity;
- mInflateService =
- ((LayoutInflater) activity.getSystemService(
- Context.LAYOUT_INFLATER_SERVICE));
- mThumbnailDir = activity.getDir("thumbnails", 0);
- }
- File getThumbnailDir() {
- return mThumbnailDir;
- }
- BrowserActivity getBrowserActivity() {
- return mActivity;
- }
- /**
- * Return the current tab's main WebView. This will always return the main
- * WebView for a given tab and not a subwindow.
- * @return The current tab's WebView.
- */
- WebView getCurrentWebView() {
- Tab t = getTab(mCurrentTab);
- if (t == null) {
- return null;
- }
- return t.mMainView;
- }
- /**
- * Return the current tab's error console. Creates the console if createIfNEcessary
- * is true and we haven't already created the console.
- * @param createIfNecessary Flag to indicate if the console should be created if it has
- * not been already.
- * @return The current tab's error console, or null if one has not been created and
- * createIfNecessary is false.
- */
- ErrorConsoleView getCurrentErrorConsole(boolean createIfNecessary) {
- Tab t = getTab(mCurrentTab);
- if (t == null) {
- return null;
- }
- if (createIfNecessary && t.mErrorConsole == null) {
- t.mErrorConsole = new ErrorConsoleView(mActivity);
- t.mErrorConsole.setWebView(t.mMainView);
- }
- return t.mErrorConsole;
- }
- /**
- * Return the current tab's top-level WebView. This can return a subwindow
- * if one exists.
- * @return The top-level WebView of the current tab.
- */
- WebView getCurrentTopWebView() {
- Tab t = getTab(mCurrentTab);
- if (t == null) {
- return null;
- }
- return t.mSubView != null ? t.mSubView : t.mMainView;
- }
- /**
- * Return the current tab's subwindow if it exists.
- * @return The subwindow of the current tab or null if it doesn't exist.
- */
- WebView getCurrentSubWindow() {
- Tab t = getTab(mCurrentTab);
- if (t == null) {
- return null;
- }
- return t.mSubView;
- }
- /**
- * Return the tab at the specified index.
- * @return The Tab for the specified index or null if the tab does not
- * exist.
- */
- Tab getTab(int index) {
- if (index >= 0 && index < mTabs.size()) {
- return mTabs.get(index);
- }
- return null;
- }
- /**
- * Return the current tab.
- * @return The current tab.
- */
- Tab getCurrentTab() {
- return getTab(mCurrentTab);
- }
- /**
- * Return the current tab index.
- * @return The current tab index
- */
- int getCurrentIndex() {
- return mCurrentTab;
- }
-
- /**
- * Given a Tab, find it's index
- * @param Tab to find
- * @return index of Tab or -1 if not found
- */
- int getTabIndex(Tab tab) {
- if (tab == null) {
- return -1;
- }
- return mTabs.indexOf(tab);
- }
- /**
- * Create a new tab.
- * @return The newly createTab or null if we have reached the maximum
- * number of open tabs.
- */
- Tab createNewTab(boolean closeOnExit, String appId, String url) {
- int size = mTabs.size();
- // Return false if we have maxed out on tabs
- if (MAX_TABS == size) {
- return null;
- }
- final WebView w = createNewWebView();
- // Create a new tab and add it to the tab list
- Tab t = new Tab(w, closeOnExit, appId, url, mActivity);
- mTabs.add(t);
- // Initially put the tab in the background.
- putTabInBackground(t);
- return t;
- }
- /**
- * Create a new tab with default values for closeOnExit(false),
- * appId(null), and url(null).
- */
- Tab createNewTab() {
- return createNewTab(false, null, null);
- }
- /**
- * Remove the tab from the list. If the tab is the current tab shown, the
- * last created tab will be shown.
- * @param t The tab to be removed.
- */
- boolean removeTab(Tab t) {
- if (t == null) {
- return false;
- }
- // Only remove the tab if it is the current one.
- if (getCurrentTab() == t) {
- putTabInBackground(t);
- }
- // Only destroy the WebView if it still exists.
- if (t.mMainView != null) {
- // Take down the sub window.
- dismissSubWindow(t);
- // Remove the WebView's settings from the BrowserSettings list of
- // observers.
- BrowserSettings.getInstance().deleteObserver(
- t.mMainView.getSettings());
- WebView w = t.mMainView;
- t.setWebView(null);
- // Destroy the main view
- w.destroy();
- }
- // clear it's references to parent and children
- t.removeFromTree();
-
- // Remove it from our list of tabs.
- mTabs.remove(t);
- // The tab indices have shifted, update all the saved state so we point
- // to the correct index.
- for (Tab tab : mTabs) {
- if (tab.mChildTabs != null) {
- for (Tab child : tab.mChildTabs) {
- child.setParentTab(tab);
- }
- }
- }
- // This tab may have been pushed in to the background and then closed.
- // If the saved state contains a picture file, delete the file.
- if (t.mSavedState != null) {
- if (t.mSavedState.containsKey(CURRPICTURE)) {
- new File(t.mSavedState.getString(CURRPICTURE)).delete();
- }
- }
- // Remove it from the queue of viewed tabs.
- mTabQueue.remove(t);
- mCurrentTab = -1;
- return true;
- }
- /**
- * Clear the back/forward list for all the current tabs.
- */
- void clearHistory() {
- int size = getTabCount();
- for (int i = 0; i < size; i++) {
- Tab t = mTabs.get(i);
- // TODO: if a tab is freed due to low memory, its history is not
- // cleared here.
- if (t.mMainView != null) {
- t.mMainView.clearHistory();
- }
- if (t.mSubView != null) {
- t.mSubView.clearHistory();
- }
- }
- }
- /**
- * Destroy all the tabs and subwindows
- */
- void destroy() {
- BrowserSettings s = BrowserSettings.getInstance();
- for (Tab t : mTabs) {
- if (t.mMainView != null) {
- dismissSubWindow(t);
- s.deleteObserver(t.mMainView.getSettings());
- WebView w = t.mMainView;
- t.setWebView(null);
- w.destroy();
- }
- }
- mTabs.clear();
- mTabQueue.clear();
- }
- /**
- * Returns the number of tabs created.
- * @return The number of tabs created.
- */
- int getTabCount() {
- return mTabs.size();
- }
- // Used for saving and restoring each Tab
- private static final String WEBVIEW = "webview";
- private static final String NUMTABS = "numTabs";
- private static final String CURRTAB = "currentTab";
- private static final String CURRURL = "currentUrl";
- private static final String CURRTITLE = "currentTitle";
- private static final String CURRPICTURE = "currentPicture";
- private static final String CLOSEONEXIT = "closeonexit";
- private static final String PARENTTAB = "parentTab";
- private static final String APPID = "appid";
- private static final String ORIGINALURL = "originalUrl";
- /**
- * Save the state of all the Tabs.
- * @param outState The Bundle to save the state to.
- */
- void saveState(Bundle outState) {
- final int numTabs = getTabCount();
- outState.putInt(NUMTABS, numTabs);
- final int index = getCurrentIndex();
- outState.putInt(CURRTAB, (index >= 0 && index < numTabs) ? index : 0);
- for (int i = 0; i < numTabs; i++) {
- final Tab t = getTab(i);
- if (saveState(t)) {
- outState.putBundle(WEBVIEW + i, t.mSavedState);
- }
- }
- }
- /**
- * Restore the state of all the tabs.
- * @param inState The saved state of all the tabs.
- * @return True if there were previous tabs that were restored. False if
- * there was no saved state or restoring the state failed.
- */
- boolean restoreState(Bundle inState) {
- final int numTabs = (inState == null)
- ? -1 : inState.getInt(NUMTABS, -1);
- if (numTabs == -1) {
- return false;
- } else {
- final int currentTab = inState.getInt(CURRTAB, -1);
- for (int i = 0; i < numTabs; i++) {
- if (i == currentTab) {
- Tab t = createNewTab();
- // Me must set the current tab before restoring the state
- // so that all the client classes are set.
- setCurrentTab(t);
- if (!restoreState(inState.getBundle(WEBVIEW + i), t)) {
- Log.w(LOGTAG, "Fail in restoreState, load home page.");
- t.mMainView.loadUrl(BrowserSettings.getInstance()
- .getHomePage());
- }
- } else {
- // Create a new tab and don't restore the state yet, add it
- // to the tab list
- Tab t = new Tab(null, false, null, null, mActivity);
- t.mSavedState = inState.getBundle(WEBVIEW + i);
- if (t.mSavedState != null) {
- populatePickerDataFromSavedState(t);
- // Need to maintain the app id and original url so we
- // can possibly reuse this tab.
- t.mAppId = t.mSavedState.getString(APPID);
- t.mOriginalUrl = t.mSavedState.getString(ORIGINALURL);
- }
- mTabs.add(t);
- mTabQueue.add(t);
- }
- }
- // Rebuild the tree of tabs. Do this after all tabs have been
- // created/restored so that the parent tab exists.
- for (int i = 0; i < numTabs; i++) {
- final Bundle b = inState.getBundle(WEBVIEW + i);
- final Tab t = getTab(i);
- if (b != null && t != null) {
- final int parentIndex = b.getInt(PARENTTAB, -1);
- if (parentIndex != -1) {
- final Tab parent = getTab(parentIndex);
- if (parent != null) {
- parent.addChildTab(t);
- }
- }
- }
- }
- }
- return true;
- }
- /**
- * Free the memory in this order, 1) free the background tab; 2) free the
- * WebView cache;
- */
- void freeMemory() {
- if (getTabCount() == 0) return;
- // free the least frequently used background tab
- Tab t = getLeastUsedTab(getCurrentTab());
- if (t != null) {
- Log.w(LOGTAG, "Free a tab in the browser");
- freeTab(t);
- // force a gc
- System.gc();
- return;
- }
- // free the WebView's unused memory (this includes the cache)
- Log.w(LOGTAG, "Free WebView's unused memory and cache");
- WebView view = getCurrentWebView();
- if (view != null) {
- // view.freeMemory();
- }
- // force a gc
- System.gc();
- }
- private Tab getLeastUsedTab(Tab current) {
- // Don't do anything if we only have 1 tab or if the current tab is
- // null.
- if (getTabCount() == 1 || current == null) {
- return null;
- }
- // Rip through the queue starting at the beginning and teardown the
- // next available tab.
- Tab t = null;
- int i = 0;
- final int queueSize = mTabQueue.size();
- if (queueSize == 0) {
- return null;
- }
- do {
- t = mTabQueue.get(i++);
- } while (i < queueSize
- && ((t != null && t.mMainView == null)
- || t == current.mParentTab));
- // Don't do anything if the last remaining tab is the current one or if
- // the last tab has been freed already.
- if (t == current || t.mMainView == null) {
- return null;
- }
- return t;
- }
- private void freeTab(Tab t) {
- // Store the WebView's state.
- saveState(t);
- // Tear down the tab.
- dismissSubWindow(t);
- // Remove the WebView's settings from the BrowserSettings list of
- // observers.
- BrowserSettings.getInstance().deleteObserver(t.mMainView.getSettings());
- WebView w = t.mMainView;
- t.setWebView(null);
- w.destroy();
- }
- /**
- * Create a new subwindow unless a subwindow already exists.
- * @return True if a new subwindow was created. False if one already exists.
- */
- void createSubWindow() {
- Tab t = getTab(mCurrentTab);
- if (t != null && t.mSubView == null) {
- final View v = mInflateService.inflate(R.layout.browser_subwindow, null);
- final WebView w = (WebView) v.findViewById(R.id.webview);
- w.setMapTrackballToArrowKeys(false); // use trackball directly
- final SubWindowClient subClient =
- new SubWindowClient(mActivity.getWebViewClient());
- final SubWindowChromeClient subChromeClient =
- new SubWindowChromeClient(t,
- mActivity.getWebChromeClient());
- w.setWebViewClient(subClient);
- w.setWebChromeClient(subChromeClient);
- w.setDownloadListener(mActivity);
- w.setOnCreateContextMenuListener(mActivity);
- final BrowserSettings s = BrowserSettings.getInstance();
- s.addObserver(w.getSettings()).update(s, null);
- t.mSubView = w;
- t.mSubViewClient = subClient;
- t.mSubViewChromeClient = subChromeClient;
- // FIXME: I really hate having to know the name of the view
- // containing the webview.
- t.mSubViewContainer = v.findViewById(R.id.subwindow_container);
- final ImageButton cancel =
- (ImageButton) v.findViewById(R.id.subwindow_close);
- cancel.setOnClickListener(new OnClickListener() {
- public void onClick(View v) {
- subChromeClient.onCloseWindow(w);
- }
- });
- }
- }
- /**
- * Show the tab that contains the given WebView.
- * @param view The WebView used to find the tab.
- */
- Tab getTabFromView(WebView view) {
- final int size = getTabCount();
- for (int i = 0; i < size; i++) {
- final Tab t = getTab(i);
- if (t.mSubView == view || t.mMainView == view) {
- return t;
- }
- }
- return null;
- }
- /**
- * Return the tab with the matching application id.
- * @param id The application identifier.
- */
- Tab getTabFromId(String id) {
- if (id == null) {
- return null;
- }
- final int size = getTabCount();
- for (int i = 0; i < size; i++) {
- final Tab t = getTab(i);
- if (id.equals(t.mAppId)) {
- return t;
- }
- }
- return null;
- }
- // This method checks if a non-app tab (one created within the browser)
- // matches the given url.
- private boolean tabMatchesUrl(Tab t, String url) {
- if (t.mAppId != null) {
- return false;
- } else if (t.mMainView == null) {
- return false;
- } else if (url.equals(t.mMainView.getUrl()) ||
- url.equals(t.mMainView.getOriginalUrl())) {
- return true;
- }
- return false;
- }
- /**
- * Return the tab that has no app id associated with it and the url of the
- * tab matches the given url.
- * @param url The url to search for.
- */
- Tab findUnusedTabWithUrl(String url) {
- if (url == null) {
- return null;
- }
- // Check the current tab first.
- Tab t = getCurrentTab();
- if (t != null && tabMatchesUrl(t, url)) {
- return t;
- }
- // Now check all the rest.
- final int size = getTabCount();
- for (int i = 0; i < size; i++) {
- t = getTab(i);
- if (tabMatchesUrl(t, url)) {
- return t;
- }
- }
- return null;
- }
- /**
- * Recreate the main WebView of the given tab. Returns true if the WebView
- * was deleted.
- */
- boolean recreateWebView(Tab t, String url) {
- final WebView w = t.mMainView;
- if (w != null) {
- if (url != null && url.equals(t.mOriginalUrl)) {
- // The original url matches the current url. Just go back to the
- // first history item so we can load it faster than if we
- // rebuilt the WebView.
- final WebBackForwardList list = w.copyBackForwardList();
- if (list != null) {
- w.goBackOrForward(-list.getCurrentIndex());
- w.clearHistory(); // maintains the current page.
- return false;
- }
- }
- // Remove the settings object from the global settings and destroy
- // the WebView.
- BrowserSettings.getInstance().deleteObserver(
- t.mMainView.getSettings());
- t.mMainView.destroy();
- }
- // Create a new WebView. If this tab is the current tab, we need to put
- // back all the clients so force it to be the current tab.
- t.setWebView(createNewWebView());
- if (getCurrentTab() == t) {
- setCurrentTab(t, true);
- }
- // Clear the saved state except for the app id and close-on-exit
- // values.
- t.mSavedState = null;
- t.mPickerData = null;
- // Save the new url in order to avoid deleting the WebView.
- t.mOriginalUrl = url;
- return true;
- }
- /**
- * Creates a new WebView and registers it with the global settings.
- */
- private WebView createNewWebView() {
- // Create a new WebView
- WebView w = new WebView(mActivity);
- w.setScrollbarFadingEnabled(true);
- w.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
- w.setMapTrackballToArrowKeys(false); // use trackball directly
- // Enable the built-in zoom
- w.getSettings().setBuiltInZoomControls(true);
- // Add this WebView to the settings observer list and update the
- // settings
- final BrowserSettings s = BrowserSettings.getInstance();
- s.addObserver(w.getSettings()).update(s, null);
- return w;
- }
- /**
- * Put the current tab in the background and set newTab as the current tab.
- * @param newTab The new tab. If newTab is null, the current tab is not
- * set.
- */
- boolean setCurrentTab(Tab newTab) {
- return setCurrentTab(newTab, false);
- }
- /*package*/ void pauseCurrentTab() {
- Tab t = getCurrentTab();
- if (t != null) {
- // t.mMainView.onPause();
- if (t.mSubView != null) {
- // t.mSubView.onPause();
- }
- }
- }
- /*package*/ void resumeCurrentTab() {
- Tab t = getCurrentTab();
- if (t != null) {
- // t.mMainView.onResume();
- if (t.mSubView != null) {
- // t.mSubView.onResume();
- }
- }
- }
- private void putViewInForeground(WebView v, WebViewClient vc,
- WebChromeClient cc) {
- v.setWebViewClient(vc);
- v.setWebChromeClient(cc);
- v.setOnCreateContextMenuListener(mActivity);
- v.setDownloadListener(mActivity);
- // v.onResume();
- }
- private void putViewInBackground(WebView v) {
- // Set an empty callback so that default actions are not triggered.
- v.setWebViewClient(mEmptyClient);
- v.setWebChromeClient(mBackgroundChromeClient);
- v.setOnCreateContextMenuListener(null);
- // Leave the DownloadManager attached so that downloads can start in
- // a non-active window. This can happen when going to a site that does
- // a redirect after a period of time. The user could have switched to
- // another tab while waiting for the download to start.
- v.setDownloadListener(mActivity);
- // v.onPause();
- }
- /**
- * If force is true, this method skips the check for newTab == current.
- */
- private boolean setCurrentTab(Tab newTab, boolean force) {
- Tab current = getTab(mCurrentTab);
- if (current == newTab && !force) {
- return true;
- }
- if (current != null) {
- // Remove the current WebView and the container of the subwindow
- putTabInBackground(current);
- }
- if (newTab == null) {
- return false;
- }
- // Move the newTab to the end of the queue
- int index = mTabQueue.indexOf(newTab);
- if (index != -1) {
- mTabQueue.remove(index);
- }
- mTabQueue.add(newTab);
- WebView mainView;
- // Display the new current tab
- mCurrentTab = mTabs.indexOf(newTab);
- mainView = newTab.mMainView;
- boolean needRestore = (mainView == null);
- if (needRestore) {
- // Same work as in createNewTab() except don't do new Tab()
- mainView = createNewWebView();
- newTab.setWebView(mainView);
- }
- putViewInForeground(mainView, mActivity.getWebViewClient(),
- mActivity.getWebChromeClient());
- // Add the subwindow if it exists
- if (newTab.mSubViewContainer != null) {
- putViewInForeground(newTab.mSubView, newTab.mSubViewClient,
- newTab.mSubViewChromeClient);
- }
- if (needRestore) {
- // Have to finish setCurrentTab work before calling restoreState
- if (!restoreState(newTab.mSavedState, newTab)) {
- mainView.loadUrl(BrowserSettings.getInstance().getHomePage());
- }
- }
- return true;
- }
- /*
- * Put the tab in the background using all the empty/background clients.
- */
- private void putTabInBackground(Tab t) {
- putViewInBackground(t.mMainView);
- if (t.mSubView != null) {
- putViewInBackground(t.mSubView);
- }
- }
- /*
- * Dismiss the subwindow for the given tab.
- */
- void dismissSubWindow(Tab t) {
- if (t != null && t.mSubView != null) {
- BrowserSettings.getInstance().deleteObserver(
- t.mSubView.getSettings());
- t.mSubView.destroy();
- t.mSubView = null;
- t.mSubViewContainer = null;
- }
- }
- /**
- * Ensure that Tab t has data to display in the tab picker.
- * @param t Tab to populate.
- */
- /* package */ void populatePickerData(Tab t) {
- if (t == null) {
- return;
- }
- // mMainView == null indicates that the tab has been freed.
- if (t.mMainView == null) {
- populatePickerDataFromSavedState(t);
- return;
- }
- // FIXME: The only place we cared about subwindow was for
- // bookmarking (i.e. not when saving state). Was this deliberate?
- final WebBackForwardList list = t.mMainView.copyBackForwardList();
- final WebHistoryItem item =
- list != null ? list.getCurrentItem() : null;
- populatePickerData(t, item);
- }
- // Create the PickerData and populate it using the saved state of the tab.
- private void populatePickerDataFromSavedState(Tab t) {
- if (t.mSavedState == null) {
- return;
- }
- final PickerData data = new PickerData();
- final Bundle state = t.mSavedState;
- data.mUrl = state.getString(CURRURL);
- data.mTitle = state.getString(CURRTITLE);
- // XXX: These keys are from WebView.savePicture so if they change, this
- // will break.
- data.mScale = state.getFloat("scale", 1.0f);
- data.mScrollX = state.getInt("scrollX", 0);
- data.mScrollY = state.getInt("scrollY", 0);
- // Set the tab's picker data.
- t.mPickerData = data;
- }
- // Populate the picker data using the given history item and the current
- // top WebView.
- private void populatePickerData(Tab t, WebHistoryItem item) {
- final PickerData data = new PickerData();
- if (item != null) {
- data.mUrl = item.getUrl();
- data.mTitle = item.getTitle();
- data.mFavicon = item.getFavicon();
- if (data.mTitle == null) {
- data.mTitle = data.mUrl;
- }
- }
- // We want to display the top window in the tab picker but use the url
- // and title of the main window.
- final WebView w = t.getTopWindow();
- data.mScale = w.getScale();
- data.mScrollX = w.getScrollX();
- data.mScrollY = w.getScrollY();
- t.mPickerData = data;
- }
-
- /**
- * Clean up the data for all tabs.
- */
- /* package */ void wipeAllPickerData() {
- int size = getTabCount();
- for (int i = 0; i < size; i++) {
- final Tab t = getTab(i);
- if (t != null && t.mSavedState == null) {
- t.mPickerData = null;
- }
- }
- }
- /*
- * Save the state for an individual tab.
- */
- private boolean saveState(Tab t) {
- if (t != null) {
- final WebView w = t.mMainView;
- // If the WebView is null it means we ran low on memory and we
- // already stored the saved state in mSavedState.
- if (w == null) {
- return true;
- }
- final Bundle b = new Bundle();
- final WebBackForwardList list = w.saveState(b);
- if (list != null) {
- final File f = new File(mThumbnailDir, w.hashCode()
- + "_pic.save");
- if (w.savePicture(b, f)) {
- b.putString(CURRPICTURE, f.getPath());
- }
- }
- // Store some extra info for displaying the tab in the picker.
- final WebHistoryItem item =
- list != null ? list.getCurrentItem() : null;
- populatePickerData(t, item);
- // XXX: WebView.savePicture stores the scale and scroll positions
- // in the bundle so we don't have to do it here.
- final PickerData data = t.mPickerData;
- if (data.mUrl != null) {
- b.putString(CURRURL, data.mUrl);
- }
- if (data.mTitle != null) {
- b.putString(CURRTITLE, data.mTitle);
- }
- b.putBoolean(CLOSEONEXIT, t.mCloseOnExit);
- if (t.mAppId != null) {
- b.putString(APPID, t.mAppId);
- }
- if (t.mOriginalUrl != null) {
- b.putString(ORIGINALURL, t.mOriginalUrl);
- }
- // Remember the parent tab so the relationship can be restored.
- if (t.mParentTab != null) {
- b.putInt(PARENTTAB, getTabIndex(t.mParentTab));
- }
- // Remember the saved state.
- t.mSavedState = b;
- return true;
- }
- return false;
- }
- /*
- * Restore the state of the tab.
- */
- private boolean restoreState(Bundle b, Tab t) {
- if (b == null) {
- return false;
- }
- // Restore the internal state even if the WebView fails to restore.
- // This will maintain the app id, original url and close-on-exit values.
- t.mSavedState = null;
- t.mPickerData = null;
- t.mCloseOnExit = b.getBoolean(CLOSEONEXIT);
- t.mAppId = b.getString(APPID);
- t.mOriginalUrl = b.getString(ORIGINALURL);
- final WebView w = t.mMainView;
- final WebBackForwardList list = w.restoreState(b);
- if (list == null) {
- return false;
- }
- if (b.containsKey(CURRPICTURE)) {
- final File f = new File(b.getString(CURRPICTURE));
- w.restorePicture(b, f);
- f.delete();
- }
- return true;
- }
- }