michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko;
michael@0: 
michael@0: import java.util.ArrayList;
michael@0: import java.util.Collection;
michael@0: import java.util.HashMap;
michael@0: import java.util.regex.Matcher;
michael@0: import java.util.regex.Pattern;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: import org.mozilla.gecko.db.BrowserContract.Bookmarks;
michael@0: import org.mozilla.gecko.db.BrowserDB;
michael@0: import org.mozilla.gecko.gfx.Layer;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: 
michael@0: import android.content.ContentResolver;
michael@0: import android.content.Context;
michael@0: import android.graphics.Bitmap;
michael@0: import android.graphics.Color;
michael@0: import android.graphics.drawable.BitmapDrawable;
michael@0: import android.os.Build;
michael@0: import android.text.TextUtils;
michael@0: import android.util.Log;
michael@0: import android.view.View;
michael@0: 
michael@0: public class Tab {
michael@0:     private static final String LOGTAG = "GeckoTab";
michael@0: 
michael@0:     private static Pattern sColorPattern;
michael@0:     private final int mId;
michael@0:     private long mLastUsed;
michael@0:     private String mUrl;
michael@0:     private String mBaseDomain;
michael@0:     private String mUserSearch;
michael@0:     private String mTitle;
michael@0:     private Bitmap mFavicon;
michael@0:     private String mFaviconUrl;
michael@0:     private int mFaviconSize;
michael@0:     private boolean mHasFeeds;
michael@0:     private boolean mHasOpenSearch;
michael@0:     private SiteIdentity mSiteIdentity;
michael@0:     private boolean mReaderEnabled;
michael@0:     private BitmapDrawable mThumbnail;
michael@0:     private int mHistoryIndex;
michael@0:     private int mHistorySize;
michael@0:     private int mParentId;
michael@0:     private boolean mExternal;
michael@0:     private boolean mBookmark;
michael@0:     private boolean mReadingListItem;
michael@0:     private int mFaviconLoadId;
michael@0:     private String mContentType;
michael@0:     private boolean mHasTouchListeners;
michael@0:     private ZoomConstraints mZoomConstraints;
michael@0:     private boolean mIsRTL;
michael@0:     private ArrayList<View> mPluginViews;
michael@0:     private HashMap<Object, Layer> mPluginLayers;
michael@0:     private int mBackgroundColor;
michael@0:     private int mState;
michael@0:     private Bitmap mThumbnailBitmap;
michael@0:     private boolean mDesktopMode;
michael@0:     private boolean mEnteringReaderMode;
michael@0:     private Context mAppContext;
michael@0:     private ErrorType mErrorType = ErrorType.NONE;
michael@0:     private static final int MAX_HISTORY_LIST_SIZE = 50;
michael@0:     private volatile int mLoadProgress;
michael@0:     private volatile int mRecordingCount = 0;
michael@0:     private String mMostRecentHomePanel;
michael@0: 
michael@0:     public static final int STATE_DELAYED = 0;
michael@0:     public static final int STATE_LOADING = 1;
michael@0:     public static final int STATE_SUCCESS = 2;
michael@0:     public static final int STATE_ERROR = 3;
michael@0: 
michael@0:     public static final int LOAD_PROGRESS_INIT = 10;
michael@0:     public static final int LOAD_PROGRESS_START = 20;
michael@0:     public static final int LOAD_PROGRESS_LOCATION_CHANGE = 60;
michael@0:     public static final int LOAD_PROGRESS_LOADED = 80;
michael@0:     public static final int LOAD_PROGRESS_STOP = 100;
michael@0: 
michael@0:     private static final int DEFAULT_BACKGROUND_COLOR = Color.WHITE;
michael@0: 
michael@0:     public enum ErrorType {
michael@0:         CERT_ERROR,  // Pages with certificate problems
michael@0:         BLOCKED,     // Pages blocked for phishing or malware warnings
michael@0:         NET_ERROR,   // All other types of error
michael@0:         NONE         // Non error pages
michael@0:     }
michael@0: 
michael@0:     public Tab(Context context, int id, String url, boolean external, int parentId, String title) {
michael@0:         mAppContext = context.getApplicationContext();
michael@0:         mId = id;
michael@0:         mLastUsed = 0;
michael@0:         mUrl = url;
michael@0:         mBaseDomain = "";
michael@0:         mUserSearch = "";
michael@0:         mExternal = external;
michael@0:         mParentId = parentId;
michael@0:         mTitle = title == null ? "" : title;
michael@0:         mFavicon = null;
michael@0:         mFaviconUrl = null;
michael@0:         mFaviconSize = 0;
michael@0:         mHasFeeds = false;
michael@0:         mHasOpenSearch = false;
michael@0:         mSiteIdentity = new SiteIdentity();
michael@0:         mReaderEnabled = false;
michael@0:         mEnteringReaderMode = false;
michael@0:         mThumbnail = null;
michael@0:         mHistoryIndex = -1;
michael@0:         mHistorySize = 0;
michael@0:         mBookmark = false;
michael@0:         mReadingListItem = false;
michael@0:         mFaviconLoadId = 0;
michael@0:         mContentType = "";
michael@0:         mZoomConstraints = new ZoomConstraints(false);
michael@0:         mPluginViews = new ArrayList<View>();
michael@0:         mPluginLayers = new HashMap<Object, Layer>();
michael@0:         mState = shouldShowProgress(url) ? STATE_LOADING : STATE_SUCCESS;
michael@0:         mLoadProgress = LOAD_PROGRESS_INIT;
michael@0: 
michael@0:         // At startup, the background is set to a color specified by LayerView
michael@0:         // when the LayerView is created. Shortly after, this background color
michael@0:         // will be used before the tab's content is shown.
michael@0:         mBackgroundColor = DEFAULT_BACKGROUND_COLOR;
michael@0: 
michael@0:         updateBookmark();
michael@0:     }
michael@0: 
michael@0:     private ContentResolver getContentResolver() {
michael@0:         return mAppContext.getContentResolver();
michael@0:     }
michael@0: 
michael@0:     public void onDestroy() {
michael@0:         Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.CLOSED);
michael@0:     }
michael@0: 
michael@0:     public int getId() {
michael@0:         return mId;
michael@0:     }
michael@0: 
michael@0:     public synchronized void onChange() {
michael@0:         mLastUsed = System.currentTimeMillis();
michael@0:     }
michael@0: 
michael@0:     public synchronized long getLastUsed() {
michael@0:         return mLastUsed;
michael@0:     }
michael@0: 
michael@0:     public int getParentId() {
michael@0:         return mParentId;
michael@0:     }
michael@0: 
michael@0:     // may be null if user-entered query hasn't yet been resolved to a URI
michael@0:     public synchronized String getURL() {
michael@0:         return mUrl;
michael@0:     }
michael@0: 
michael@0:     // mUserSearch should never be null, but it may be an empty string
michael@0:     public synchronized String getUserSearch() {
michael@0:         return mUserSearch;
michael@0:     }
michael@0: 
michael@0:     // mTitle should never be null, but it may be an empty string
michael@0:     public synchronized String getTitle() {
michael@0:         return mTitle;
michael@0:     }
michael@0: 
michael@0:     public String getDisplayTitle() {
michael@0:         if (mTitle != null && mTitle.length() > 0) {
michael@0:             return mTitle;
michael@0:         }
michael@0: 
michael@0:         return mUrl;
michael@0:     }
michael@0: 
michael@0:     public String getBaseDomain() {
michael@0:         return mBaseDomain;
michael@0:     }
michael@0: 
michael@0:     public Bitmap getFavicon() {
michael@0:         return mFavicon;
michael@0:     }
michael@0: 
michael@0:     public BitmapDrawable getThumbnail() {
michael@0:         return mThumbnail;
michael@0:     }
michael@0: 
michael@0:     public String getMostRecentHomePanel() {
michael@0:         return mMostRecentHomePanel;
michael@0:     }
michael@0: 
michael@0:     public void setMostRecentHomePanel(String panelId) {
michael@0:         mMostRecentHomePanel = panelId;
michael@0:     }
michael@0: 
michael@0:     public Bitmap getThumbnailBitmap(int width, int height) {
michael@0:         if (mThumbnailBitmap != null) {
michael@0:             // Bug 787318 - Honeycomb has a bug with bitmap caching, we can't
michael@0:             // reuse the bitmap there.
michael@0:             boolean honeycomb = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB
michael@0:                               && Build.VERSION.SDK_INT <= Build.VERSION_CODES.HONEYCOMB_MR2);
michael@0:             boolean sizeChange = mThumbnailBitmap.getWidth() != width
michael@0:                               || mThumbnailBitmap.getHeight() != height;
michael@0:             if (honeycomb || sizeChange) {
michael@0:                 mThumbnailBitmap = null;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         if (mThumbnailBitmap == null) {
michael@0:             Bitmap.Config config = (GeckoAppShell.getScreenDepth() == 24) ?
michael@0:                 Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
michael@0:             mThumbnailBitmap = Bitmap.createBitmap(width, height, config);
michael@0:         }
michael@0: 
michael@0:         return mThumbnailBitmap;
michael@0:     }
michael@0: 
michael@0:     public void updateThumbnail(final Bitmap b) {
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 if (b != null) {
michael@0:                     try {
michael@0:                         mThumbnail = new BitmapDrawable(mAppContext.getResources(), b);
michael@0:                         if (mState == Tab.STATE_SUCCESS)
michael@0:                             saveThumbnailToDB();
michael@0:                     } catch (OutOfMemoryError oom) {
michael@0:                         Log.w(LOGTAG, "Unable to create/scale bitmap.", oom);
michael@0:                         mThumbnail = null;
michael@0:                     }
michael@0:                 } else {
michael@0:                     mThumbnail = null;
michael@0:                 }
michael@0: 
michael@0:                 Tabs.getInstance().notifyListeners(Tab.this, Tabs.TabEvents.THUMBNAIL);
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     public synchronized String getFaviconURL() {
michael@0:         return mFaviconUrl;
michael@0:     }
michael@0: 
michael@0:     public boolean hasFeeds() {
michael@0:         return mHasFeeds;
michael@0:     }
michael@0: 
michael@0:     public boolean hasOpenSearch() {
michael@0:         return mHasOpenSearch;
michael@0:     }
michael@0: 
michael@0:     public SiteIdentity getSiteIdentity() {
michael@0:         return mSiteIdentity;
michael@0:     }
michael@0: 
michael@0:     public boolean getReaderEnabled() {
michael@0:         return mReaderEnabled;
michael@0:     }
michael@0: 
michael@0:     public boolean isBookmark() {
michael@0:         return mBookmark;
michael@0:     }
michael@0: 
michael@0:     public boolean isReadingListItem() {
michael@0:         return mReadingListItem;
michael@0:     }
michael@0: 
michael@0:     public boolean isExternal() {
michael@0:         return mExternal;
michael@0:     }
michael@0: 
michael@0:     public synchronized void updateURL(String url) {
michael@0:         if (url != null && url.length() > 0) {
michael@0:             mUrl = url;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private synchronized void updateUserSearch(String userSearch) {
michael@0:         mUserSearch = userSearch;
michael@0:     }
michael@0: 
michael@0:     public void setErrorType(String type) {
michael@0:         if ("blocked".equals(type))
michael@0:             setErrorType(ErrorType.BLOCKED);
michael@0:         else if ("certerror".equals(type))
michael@0:             setErrorType(ErrorType.CERT_ERROR);
michael@0:         else if ("neterror".equals(type))
michael@0:             setErrorType(ErrorType.NET_ERROR);
michael@0:         else
michael@0:             setErrorType(ErrorType.NONE);
michael@0:     }
michael@0: 
michael@0:     public void setErrorType(ErrorType type) {
michael@0:         mErrorType = type;
michael@0:     }
michael@0: 
michael@0:     public ErrorType getErrorType() {
michael@0:         return mErrorType;
michael@0:     }
michael@0: 
michael@0:     public void setContentType(String contentType) {
michael@0:         mContentType = (contentType == null) ? "" : contentType;
michael@0:     }
michael@0: 
michael@0:     public String getContentType() {
michael@0:         return mContentType;
michael@0:     }
michael@0: 
michael@0:     public synchronized void updateTitle(String title) {
michael@0:         // Keep the title unchanged while entering reader mode.
michael@0:         if (mEnteringReaderMode) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // If there was a title, but it hasn't changed, do nothing.
michael@0:         if (mTitle != null &&
michael@0:             TextUtils.equals(mTitle, title)) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         mTitle = (title == null ? "" : title);
michael@0:         Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.TITLE);
michael@0:     }
michael@0: 
michael@0:     public void setState(int state) {
michael@0:         mState = state;
michael@0: 
michael@0:         if (mState != Tab.STATE_LOADING)
michael@0:             mEnteringReaderMode = false;
michael@0:     }
michael@0: 
michael@0:     public int getState() {
michael@0:         return mState;
michael@0:     }
michael@0: 
michael@0:     public void setZoomConstraints(ZoomConstraints constraints) {
michael@0:         mZoomConstraints = constraints;
michael@0:     }
michael@0: 
michael@0:     public ZoomConstraints getZoomConstraints() {
michael@0:         return mZoomConstraints;
michael@0:     }
michael@0: 
michael@0:     public void setIsRTL(boolean aIsRTL) {
michael@0:         mIsRTL = aIsRTL;
michael@0:     }
michael@0: 
michael@0:     public boolean getIsRTL() {
michael@0:         return mIsRTL;
michael@0:     }
michael@0: 
michael@0:     public void setHasTouchListeners(boolean aValue) {
michael@0:         mHasTouchListeners = aValue;
michael@0:     }
michael@0: 
michael@0:     public boolean getHasTouchListeners() {
michael@0:         return mHasTouchListeners;
michael@0:     }
michael@0: 
michael@0:     public void setFaviconLoadId(int faviconLoadId) {
michael@0:         mFaviconLoadId = faviconLoadId;
michael@0:     }
michael@0: 
michael@0:     public int getFaviconLoadId() {
michael@0:         return mFaviconLoadId;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Returns true if the favicon changed.
michael@0:      */
michael@0:     public boolean updateFavicon(Bitmap favicon) {
michael@0:         if (mFavicon == favicon) {
michael@0:             return false;
michael@0:         }
michael@0:         mFavicon = favicon;
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     public synchronized void updateFaviconURL(String faviconUrl, int size) {
michael@0:         // If we already have an "any" sized icon, don't update the icon.
michael@0:         if (mFaviconSize == -1)
michael@0:             return;
michael@0: 
michael@0:         // Only update the favicon if it's bigger than the current favicon.
michael@0:         // We use -1 to represent icons with sizes="any".
michael@0:         if (size == -1 || size >= mFaviconSize) {
michael@0:             mFaviconUrl = faviconUrl;
michael@0:             mFaviconSize = size;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public synchronized void clearFavicon() {
michael@0:         // Keep the favicon unchanged while entering reader mode
michael@0:         if (mEnteringReaderMode)
michael@0:             return;
michael@0: 
michael@0:         mFavicon = null;
michael@0:         mFaviconUrl = null;
michael@0:         mFaviconSize = 0;
michael@0:     }
michael@0: 
michael@0:     public void setHasFeeds(boolean hasFeeds) {
michael@0:         mHasFeeds = hasFeeds;
michael@0:     }
michael@0: 
michael@0:     public void setHasOpenSearch(boolean hasOpenSearch) {
michael@0:         mHasOpenSearch = hasOpenSearch;
michael@0:     }
michael@0: 
michael@0:     public void updateIdentityData(JSONObject identityData) {
michael@0:         mSiteIdentity.update(identityData);
michael@0:     }
michael@0: 
michael@0:     public void setReaderEnabled(boolean readerEnabled) {
michael@0:         mReaderEnabled = readerEnabled;
michael@0:         Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.MENU_UPDATED);
michael@0:     }
michael@0: 
michael@0:     void updateBookmark() {
michael@0:         if (getURL() == null) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 final String url = getURL();
michael@0:                 if (url == null) {
michael@0:                     return;
michael@0:                 }
michael@0: 
michael@0:                 final int flags = BrowserDB.getItemFlags(getContentResolver(), url);
michael@0:                 mBookmark = (flags & Bookmarks.FLAG_BOOKMARK) > 0;
michael@0:                 mReadingListItem = (flags & Bookmarks.FLAG_READING) > 0;
michael@0:                 Tabs.getInstance().notifyListeners(Tab.this, Tabs.TabEvents.MENU_UPDATED);
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     public void addBookmark() {
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 String url = getURL();
michael@0:                 if (url == null)
michael@0:                     return;
michael@0: 
michael@0:                 BrowserDB.addBookmark(getContentResolver(), mTitle, url);
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     public void removeBookmark() {
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 String url = getURL();
michael@0:                 if (url == null)
michael@0:                     return;
michael@0: 
michael@0:                 BrowserDB.removeBookmarksWithURL(getContentResolver(), url);
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     public void addToReadingList() {
michael@0:         if (!mReaderEnabled)
michael@0:             return;
michael@0: 
michael@0:         JSONObject json = new JSONObject();
michael@0:         try {
michael@0:             json.put("tabID", String.valueOf(getId()));
michael@0:         } catch (JSONException e) {
michael@0:             Log.e(LOGTAG, "JSON error - failing to add to reading list", e);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Reader:Add", json.toString());
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:     }
michael@0: 
michael@0:     public void toggleReaderMode() {
michael@0:         if (AboutPages.isAboutReader(mUrl)) {
michael@0:             Tabs.getInstance().loadUrl(ReaderModeUtils.getUrlFromAboutReader(mUrl));
michael@0:         } else if (mReaderEnabled) {
michael@0:             mEnteringReaderMode = true;
michael@0:             Tabs.getInstance().loadUrl(ReaderModeUtils.getAboutReaderForUrl(mUrl, mId));
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public boolean isEnteringReaderMode() {
michael@0:         return mEnteringReaderMode;
michael@0:     }
michael@0: 
michael@0:     public void doReload() {
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Session:Reload", "");
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:     }
michael@0: 
michael@0:     // Our version of nsSHistory::GetCanGoBack
michael@0:     public boolean canDoBack() {
michael@0:         return mHistoryIndex > 0;
michael@0:     }
michael@0: 
michael@0:     public boolean doBack() {
michael@0:         if (!canDoBack())
michael@0:             return false;
michael@0: 
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Session:Back", "");
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     public boolean showBackHistory() {
michael@0:         if (!canDoBack())
michael@0:             return false;
michael@0:         return this.showHistory(Math.max(mHistoryIndex - MAX_HISTORY_LIST_SIZE, 0), mHistoryIndex, mHistoryIndex);
michael@0:     }
michael@0: 
michael@0:     public boolean showForwardHistory() {
michael@0:         if (!canDoForward())
michael@0:             return false;
michael@0:         return this.showHistory(mHistoryIndex, Math.min(mHistorySize - 1, mHistoryIndex + MAX_HISTORY_LIST_SIZE), mHistoryIndex);
michael@0:     }
michael@0: 
michael@0:     public boolean showAllHistory() {
michael@0:         if (!canDoForward() && !canDoBack())
michael@0:             return false;
michael@0: 
michael@0:         int min = mHistoryIndex - MAX_HISTORY_LIST_SIZE / 2;
michael@0:         int max = mHistoryIndex + MAX_HISTORY_LIST_SIZE / 2;
michael@0:         if (min < 0) {
michael@0:             max -= min;
michael@0:         }
michael@0:         if (max > mHistorySize - 1) {
michael@0:             min -= max - (mHistorySize - 1);
michael@0:             max = mHistorySize - 1;
michael@0:         }
michael@0:         min = Math.max(min, 0);
michael@0: 
michael@0:         return this.showHistory(min, max, mHistoryIndex);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * This method will show the history starting on fromIndex until toIndex of the history.
michael@0:      */
michael@0:     public boolean showHistory(int fromIndex, int toIndex, int selIndex) {
michael@0:         JSONObject json = new JSONObject();
michael@0:         try {
michael@0:             json.put("fromIndex", fromIndex);
michael@0:             json.put("toIndex", toIndex);
michael@0:             json.put("selIndex", selIndex);
michael@0:         } catch (JSONException e) {
michael@0:             Log.e(LOGTAG, "JSON error", e);
michael@0:         }
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Session:ShowHistory", json.toString());
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     public void doStop() {
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Session:Stop", "");
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:     }
michael@0: 
michael@0:     // Our version of nsSHistory::GetCanGoForward
michael@0:     public boolean canDoForward() {
michael@0:         return mHistoryIndex < mHistorySize - 1;
michael@0:     }
michael@0: 
michael@0:     public boolean doForward() {
michael@0:         if (!canDoForward())
michael@0:             return false;
michael@0: 
michael@0:         GeckoEvent e = GeckoEvent.createBroadcastEvent("Session:Forward", "");
michael@0:         GeckoAppShell.sendEventToGecko(e);
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     void handleSessionHistoryMessage(String event, JSONObject message) throws JSONException {
michael@0:         if (event.equals("New")) {
michael@0:             final String url = message.getString("url");
michael@0:             mHistoryIndex++;
michael@0:             mHistorySize = mHistoryIndex + 1;
michael@0:         } else if (event.equals("Back")) {
michael@0:             if (!canDoBack()) {
michael@0:                 Log.w(LOGTAG, "Received unexpected back notification");
michael@0:                 return;
michael@0:             }
michael@0:             mHistoryIndex--;
michael@0:         } else if (event.equals("Forward")) {
michael@0:             if (!canDoForward()) {
michael@0:                 Log.w(LOGTAG, "Received unexpected forward notification");
michael@0:                 return;
michael@0:             }
michael@0:             mHistoryIndex++;
michael@0:         } else if (event.equals("Goto")) {
michael@0:             int index = message.getInt("index");
michael@0:             if (index < 0 || index >= mHistorySize) {
michael@0:                 Log.w(LOGTAG, "Received unexpected history-goto notification");
michael@0:                 return;
michael@0:             }
michael@0:             mHistoryIndex = index;
michael@0:         } else if (event.equals("Purge")) {
michael@0:             int numEntries = message.getInt("numEntries");
michael@0:             if (numEntries > mHistorySize) {
michael@0:                 Log.w(LOGTAG, "Received unexpectedly large number of history entries to purge");
michael@0:                 mHistoryIndex = -1;
michael@0:                 mHistorySize = 0;
michael@0:                 return;
michael@0:             }
michael@0: 
michael@0:             mHistorySize -= numEntries;
michael@0:             mHistoryIndex -= numEntries;
michael@0: 
michael@0:             // If we weren't at the last history entry, mHistoryIndex may have become too small
michael@0:             if (mHistoryIndex < -1)
michael@0:                 mHistoryIndex = -1;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     void handleLocationChange(JSONObject message) throws JSONException {
michael@0:         final String uri = message.getString("uri");
michael@0:         final String oldUrl = getURL();
michael@0:         final boolean sameDocument = message.getBoolean("sameDocument");
michael@0:         mEnteringReaderMode = ReaderModeUtils.isEnteringReaderMode(oldUrl, uri);
michael@0: 
michael@0:         if (!TextUtils.equals(oldUrl, uri)) {
michael@0:             updateURL(uri);
michael@0:             updateBookmark();
michael@0:             if (!sameDocument) {
michael@0:                 // We can unconditionally clear the favicon and title here: we
michael@0:                 // already filtered both cases in which this was a (pseudo-)
michael@0:                 // spurious location change, so we're definitely loading a new
michael@0:                 // page.
michael@0:                 clearFavicon();
michael@0:                 updateTitle(null);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         if (sameDocument) {
michael@0:             // We can get a location change event for the same document with an anchor tag
michael@0:             // Notify listeners so that buttons like back or forward will update themselves
michael@0:             Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.LOCATION_CHANGE, oldUrl);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         setContentType(message.getString("contentType"));
michael@0:         updateUserSearch(message.getString("userSearch"));
michael@0:         mBaseDomain = message.optString("baseDomain");
michael@0: 
michael@0:         setHasFeeds(false);
michael@0:         setHasOpenSearch(false);
michael@0:         updateIdentityData(null);
michael@0:         setReaderEnabled(false);
michael@0:         setZoomConstraints(new ZoomConstraints(true));
michael@0:         setHasTouchListeners(false);
michael@0:         setBackgroundColor(DEFAULT_BACKGROUND_COLOR);
michael@0:         setErrorType(ErrorType.NONE);
michael@0:         setLoadProgressIfLoading(LOAD_PROGRESS_LOCATION_CHANGE);
michael@0: 
michael@0:         Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.LOCATION_CHANGE, oldUrl);
michael@0:     }
michael@0: 
michael@0:     private static boolean shouldShowProgress(final String url) {
michael@0:         return !AboutPages.isAboutPage(url);
michael@0:     }
michael@0: 
michael@0:     void handleDocumentStart(boolean restoring, String url) {
michael@0:         setLoadProgress(LOAD_PROGRESS_START);
michael@0:         setState((!restoring && shouldShowProgress(url)) ? STATE_LOADING : STATE_SUCCESS);
michael@0:         updateIdentityData(null);
michael@0:         setReaderEnabled(false);
michael@0:     }
michael@0: 
michael@0:     void handleDocumentStop(boolean success) {
michael@0:         setState(success ? STATE_SUCCESS : STATE_ERROR);
michael@0: 
michael@0:         final String oldURL = getURL();
michael@0:         final Tab tab = this;
michael@0:         tab.setLoadProgress(LOAD_PROGRESS_STOP);
michael@0:         ThreadUtils.getBackgroundHandler().postDelayed(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 // tab.getURL() may return null
michael@0:                 if (!TextUtils.equals(oldURL, getURL()))
michael@0:                     return;
michael@0: 
michael@0:                 ThumbnailHelper.getInstance().getAndProcessThumbnailFor(tab);
michael@0:             }
michael@0:         }, 500);
michael@0:     }
michael@0: 
michael@0:     void handleContentLoaded() {
michael@0:         setLoadProgressIfLoading(LOAD_PROGRESS_LOADED);
michael@0:     }
michael@0: 
michael@0:     protected void saveThumbnailToDB() {
michael@0:         final BitmapDrawable thumbnail = mThumbnail;
michael@0:         if (thumbnail == null) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         try {
michael@0:             String url = getURL();
michael@0:             if (url == null) {
michael@0:                 return;
michael@0:             }
michael@0: 
michael@0:             BrowserDB.updateThumbnailForUrl(getContentResolver(), url, thumbnail);
michael@0:         } catch (Exception e) {
michael@0:             // ignore
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public void addPluginView(View view) {
michael@0:         mPluginViews.add(view);
michael@0:     }
michael@0: 
michael@0:     public void removePluginView(View view) {
michael@0:         mPluginViews.remove(view);
michael@0:     }
michael@0: 
michael@0:     public View[] getPluginViews() {
michael@0:         return mPluginViews.toArray(new View[mPluginViews.size()]);
michael@0:     }
michael@0: 
michael@0:     public void addPluginLayer(Object surfaceOrView, Layer layer) {
michael@0:         synchronized(mPluginLayers) {
michael@0:             mPluginLayers.put(surfaceOrView, layer);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public Layer getPluginLayer(Object surfaceOrView) {
michael@0:         synchronized(mPluginLayers) {
michael@0:             return mPluginLayers.get(surfaceOrView);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public Collection<Layer> getPluginLayers() {
michael@0:         synchronized(mPluginLayers) {
michael@0:             return new ArrayList<Layer>(mPluginLayers.values());
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public Layer removePluginLayer(Object surfaceOrView) {
michael@0:         synchronized(mPluginLayers) {
michael@0:             return mPluginLayers.remove(surfaceOrView);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public int getBackgroundColor() {
michael@0:         return mBackgroundColor;
michael@0:     }
michael@0: 
michael@0:     /** Sets a new color for the background. */
michael@0:     public void setBackgroundColor(int color) {
michael@0:         mBackgroundColor = color;
michael@0:     }
michael@0: 
michael@0:     /** Parses and sets a new color for the background. */
michael@0:     public void setBackgroundColor(String newColor) {
michael@0:         setBackgroundColor(parseColorFromGecko(newColor));
michael@0:     }
michael@0: 
michael@0:     // Parses a color from an RGB triple of the form "rgb([0-9]+, [0-9]+, [0-9]+)". If the color
michael@0:     // cannot be parsed, returns white.
michael@0:     private static int parseColorFromGecko(String string) {
michael@0:         if (sColorPattern == null) {
michael@0:             sColorPattern = Pattern.compile("rgb\\((\\d+),\\s*(\\d+),\\s*(\\d+)\\)");
michael@0:         }
michael@0: 
michael@0:         Matcher matcher = sColorPattern.matcher(string);
michael@0:         if (!matcher.matches()) {
michael@0:             return Color.WHITE;
michael@0:         }
michael@0: 
michael@0:         int r = Integer.parseInt(matcher.group(1));
michael@0:         int g = Integer.parseInt(matcher.group(2));
michael@0:         int b = Integer.parseInt(matcher.group(3));
michael@0:         return Color.rgb(r, g, b);
michael@0:     }
michael@0: 
michael@0:     public void setDesktopMode(boolean enabled) {
michael@0:         mDesktopMode = enabled;
michael@0:     }
michael@0: 
michael@0:     public boolean getDesktopMode() {
michael@0:         return mDesktopMode;
michael@0:     }
michael@0: 
michael@0:     public boolean isPrivate() {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Sets the tab load progress to the given percentage.
michael@0:      *
michael@0:      * @param progressPercentage Percentage to set progress to (0-100)
michael@0:      */
michael@0:     void setLoadProgress(int progressPercentage) {
michael@0:         mLoadProgress = progressPercentage;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Sets the tab load progress to the given percentage only if the tab is
michael@0:      * currently loading.
michael@0:      *
michael@0:      * about:neterror can trigger a STOP before other page load events (bug
michael@0:      * 976426), so any post-START events should make sure the page is loading
michael@0:      * before updating progress.
michael@0:      *
michael@0:      * @param progressPercentage Percentage to set progress to (0-100)
michael@0:      */
michael@0:     void setLoadProgressIfLoading(int progressPercentage) {
michael@0:         if (getState() == STATE_LOADING) {
michael@0:             setLoadProgress(progressPercentage);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Gets the tab load progress percentage.
michael@0:      *
michael@0:      * @return Current progress percentage
michael@0:      */
michael@0:     public int getLoadProgress() {
michael@0:         return mLoadProgress;
michael@0:     }
michael@0: 
michael@0:     public void setRecording(boolean isRecording) {
michael@0:         if (isRecording) {
michael@0:             mRecordingCount++;
michael@0:         } else {
michael@0:             mRecordingCount--;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public boolean isRecording() {
michael@0:         return mRecordingCount > 0;
michael@0:     }
michael@0: }