| /* |
| * 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.android.browser; |
| |
| import android.content.Context; |
| 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 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 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); |
| } |
| } |
| // 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.showTab(t); |
| } |
| } |
| } |
| |
| // Extra saved information for displaying the tab in the picker. |
| public static class PickerData { |
| String mUrl; |
| String mTitle; |
| float mScale; |
| int mScrollX; |
| int mScrollY; |
| int mWidth; |
| Picture mPicture; |
| // This can be null. When a new picture comes in, this view should be |
| // invalidated to show the new picture. |
| FakeWebView mFakeWebView; |
| } |
| |
| /** |
| * Private class for maintaining Tabs with a main WebView and a subwindow. |
| */ |
| public class Tab implements WebView.PictureListener { |
| // 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; |
| |
| // Construct a new tab |
| private Tab(WebView w, boolean closeOnExit, String appId, String url) { |
| mMainView = w; |
| mCloseOnExit = closeOnExit; |
| mAppId = appId; |
| mOriginalUrl = url; |
| } |
| |
| /** |
| * 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 subwindow of this tab or null if there is no subwindow. |
| * @return The subwindow of this tab or null. |
| */ |
| public WebView getSubWebView() { |
| return mSubView; |
| } |
| |
| /** |
| * Return the subwindow container of this tab or null if there is no |
| * subwindow. |
| * @return The subwindow's container View. |
| */ |
| public View getSubWebViewContainer() { |
| return mSubViewContainer; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * Returns the picker data. |
| */ |
| public PickerData getPickerData() { |
| return mPickerData; |
| } |
| |
| 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; |
| } |
| |
| public void onNewPicture(WebView view, Picture p) { |
| if (mPickerData == null) { |
| return; |
| } |
| |
| mPickerData.mPicture = p; |
| // Tell the FakeWebView to redraw. |
| if (mPickerData.mFakeWebView != null) { |
| mPickerData.mFakeWebView.invalidate(); |
| } |
| } |
| }; |
| |
| // 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 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) { |
| 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); |
| 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()); |
| // Destroy the main view and subview |
| t.mMainView.destroy(); |
| t.mMainView = null; |
| } |
| // 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()); |
| t.mMainView.destroy(); |
| t.mMainView = null; |
| } |
| } |
| 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 CURRWIDTH = "currentWidth"; |
| 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); |
| 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() { |
| // free the least frequently used background tab |
| Tab t = getLeastUsedTab(); |
| if (t != null) { |
| Log.w(LOGTAG, "Free a tab in the browser"); |
| freeTab(t); |
| // force a gc |
| System.gc(); |
| return; |
| } |
| |
| // free the WebView cache |
| Log.w(LOGTAG, "Free WebView cache"); |
| WebView view = getCurrentWebView(); |
| if (view != null) { |
| view.clearCache(false); |
| } |
| // force a gc |
| System.gc(); |
| } |
| |
| private Tab getLeastUsedTab() { |
| // Don't do anything if we only have 1 tab. |
| if (getTabCount() == 1) { |
| 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); |
| |
| // Don't do anything if the last remaining tab is the current one or if |
| // the last tab has been freed already. |
| if (t == getCurrentTab() || 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()); |
| t.mMainView.destroy(); |
| t.mMainView = null; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * 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.mMainView = 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.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); |
| } |
| |
| /** |
| * 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; |
| WebView subView; |
| |
| // 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() |
| newTab.mMainView = mainView = createNewWebView(); |
| } |
| mainView.setWebViewClient(mActivity.getWebViewClient()); |
| mainView.setWebChromeClient(mActivity.getWebChromeClient()); |
| mainView.setOnCreateContextMenuListener(mActivity); |
| mainView.setDownloadListener(mActivity); |
| // Add the subwindow if it exists |
| if (newTab.mSubViewContainer != null) { |
| subView = newTab.mSubView; |
| subView.setWebViewClient(newTab.mSubViewClient); |
| subView.setWebChromeClient(newTab.mSubViewChromeClient); |
| subView.setOnCreateContextMenuListener(mActivity); |
| subView.setDownloadListener(mActivity); |
| } |
| 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) { |
| WebView mainView = t.mMainView; |
| // Set an empty callback so that default actions are not triggered. |
| mainView.setWebViewClient(mEmptyClient); |
| mainView.setWebChromeClient(mBackgroundChromeClient); |
| mainView.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. |
| mainView.setDownloadListener(mActivity); |
| WebView subView = t.mSubView; |
| if (subView != null) { |
| // Set an empty callback so that default actions are not triggered. |
| subView.setWebViewClient(mEmptyClient); |
| subView.setWebChromeClient(mBackgroundChromeClient); |
| subView.setOnCreateContextMenuListener(null); |
| subView.setDownloadListener(mActivity); |
| } |
| } |
| |
| /* |
| * 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); |
| |
| // This method is only called during the tab picker creation. At this |
| // point we need to listen for new pictures since the WebView is still |
| // active. |
| final WebView w = t.getTopWindow(); |
| w.setPictureListener(t); |
| // Capture the picture here instead of populatePickerData since it can |
| // be called when saving the state of a tab. |
| t.mPickerData.mPicture = w.capturePicture(); |
| } |
| |
| // 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); |
| data.mWidth = state.getInt(CURRWIDTH, 0); |
| // 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); |
| |
| if (state.containsKey(CURRPICTURE)) { |
| final File f = new File(t.mSavedState.getString(CURRPICTURE)); |
| try { |
| final FileInputStream in = new FileInputStream(f); |
| data.mPicture = Picture.createFromStream(in); |
| in.close(); |
| } catch (Exception ex) { |
| // Ignore any problems with inflating the picture. We just |
| // won't draw anything. |
| } |
| } |
| |
| // 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(); |
| 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.mWidth = w.getWidth(); |
| 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; |
| } |
| if (t.mMainView != null) { |
| // Clear the picture listeners. |
| t.mMainView.setPictureListener(null); |
| if (t.mSubView != null) { |
| t.mSubView.setPictureListener(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.putInt(CURRWIDTH, data.mWidth); |
| 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; |
| } |
| } |