gecko/mobile/android/base/Tabs.java
2012-05-25 12:47:51 -07:00

328 lines
11 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.ContentResolver;
import android.os.SystemClock;
import android.util.Log;
public class Tabs implements GeckoEventListener {
private static final String LOGTAG = "GeckoTabs";
private Tab selectedTab;
private HashMap<Integer, Tab> tabs;
private ArrayList<Tab> order;
private ContentResolver resolver;
private boolean mRestoringSession = false;
private Tabs() {
tabs = new HashMap<Integer, Tab>();
order = new ArrayList<Tab>();
GeckoAppShell.registerGeckoEventListener("SessionHistory:New", this);
GeckoAppShell.registerGeckoEventListener("SessionHistory:Back", this);
GeckoAppShell.registerGeckoEventListener("SessionHistory:Forward", this);
GeckoAppShell.registerGeckoEventListener("SessionHistory:Goto", this);
GeckoAppShell.registerGeckoEventListener("SessionHistory:Purge", this);
GeckoAppShell.registerGeckoEventListener("Tab:Added", this);
GeckoAppShell.registerGeckoEventListener("Tab:Close", this);
GeckoAppShell.registerGeckoEventListener("Tab:Select", this);
GeckoAppShell.registerGeckoEventListener("Session:RestoreBegin", this);
GeckoAppShell.registerGeckoEventListener("Session:RestoreEnd", this);
}
public int getCount() {
return tabs.size();
}
public Tab addTab(JSONObject params) throws JSONException {
int id = params.getInt("tabID");
if (tabs.containsKey(id))
return tabs.get(id);
// null strings return "null" (http://code.google.com/p/android/issues/detail?id=13830)
String url = params.isNull("uri") ? null : params.getString("uri");
Boolean external = params.getBoolean("external");
int parentId = params.getInt("parentId");
String title = params.getString("title");
Tab tab = new Tab(id, url, external, parentId, title);
tabs.put(id, tab);
order.add(tab);
if (!mRestoringSession) {
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
GeckoApp.mBrowserToolbar.updateTabCountAndAnimate(getCount());
GeckoApp.mBrowserToolbar.updateBackButton(false);
GeckoApp.mBrowserToolbar.updateForwardButton(false);
GeckoApp.mAppContext.invalidateOptionsMenu();
}
});
}
Log.i(LOGTAG, "Added a tab with id: " + id);
return tab;
}
public void removeTab(int id) {
if (tabs.containsKey(id)) {
order.remove(getTab(id));
tabs.remove(id);
Log.i(LOGTAG, "Removed a tab with id: " + id);
}
}
public Tab selectTab(int id) {
if (!tabs.containsKey(id))
return null;
final Tab oldTab = getSelectedTab();
final Tab tab = tabs.get(id);
// This avoids a NPE below, but callers need to be careful to
// handle this case
if (tab == null)
return null;
if ("about:home".equals(tab.getURL()))
GeckoApp.mAppContext.showAboutHome();
else
GeckoApp.mAppContext.hideAboutHome();
selectedTab = tab;
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
GeckoApp.mFormAssistPopup.hide();
if (isSelectedTab(tab)) {
String url = tab.getURL();
GeckoApp.mBrowserToolbar.refresh();
GeckoApp.mAppContext.invalidateOptionsMenu();
GeckoApp.mDoorHangerPopup.updatePopup();
notifyListeners(tab, TabEvents.SELECTED);
if (oldTab != null)
GeckoApp.mAppContext.hidePlugins(oldTab);
}
}
});
// Pass a message to Gecko to update tab state in BrowserApp
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Tab:Selected", String.valueOf(tab.getId())));
return tab;
}
public int getIndexOf(Tab tab) {
return order.lastIndexOf(tab);
}
public Tab getTabAt(int index) {
if (index >= 0 && index < order.size())
return order.get(index);
else
return null;
}
public Tab getSelectedTab() {
return selectedTab;
}
public boolean isSelectedTab(Tab tab) {
if (selectedTab == null)
return false;
return tab == selectedTab;
}
public Tab getTab(int id) {
if (getCount() == 0)
return null;
if (!tabs.containsKey(id))
return null;
return tabs.get(id);
}
/** Close tab and then select the default next tab */
public void closeTab(Tab tab) {
closeTab(tab, getNextTab(tab));
}
/** Close tab and then select nextTab */
public void closeTab(final Tab tab, Tab nextTab) {
if (tab == null || nextTab == null)
return;
selectTab(nextTab.getId());
int tabId = tab.getId();
removeTab(tabId);
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
notifyListeners(tab, TabEvents.CLOSED);
GeckoApp.mBrowserToolbar.updateTabCountAndAnimate(Tabs.getInstance().getCount());
GeckoApp.mDoorHangerPopup.updatePopup();
GeckoApp.mAppContext.hidePlugins(tab);
tab.onDestroy();
}
});
// Pass a message to Gecko to update tab state in BrowserApp
GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Tab:Closed", String.valueOf(tabId)));
}
/** Return the tab that will be selected by default after this one is closed */
public Tab getNextTab(Tab tab) {
Tab selectedTab = getSelectedTab();
if (selectedTab != tab)
return selectedTab;
int index = getIndexOf(tab);
Tab nextTab = getTabAt(index + 1);
if (nextTab == null)
nextTab = getTabAt(index - 1);
Tab parent = getTab(tab.getParentId());
if (parent != null) {
// If the next tab is a sibling, switch to it. Otherwise go back to the parent.
if (nextTab != null && nextTab.getParentId() == tab.getParentId())
return nextTab;
else
return parent;
}
return nextTab;
}
public HashMap<Integer, Tab> getTabs() {
if (getCount() == 0)
return null;
return tabs;
}
public ArrayList<Tab> getTabsInOrder() {
if (getCount() == 0)
return null;
return order;
}
public void setContentResolver(ContentResolver resolver) {
this.resolver = resolver;
}
public ContentResolver getContentResolver() {
return resolver;
}
//Making Tabs a singleton class
private static class TabsInstanceHolder {
private static final Tabs INSTANCE = new Tabs();
}
public static Tabs getInstance() {
return Tabs.TabsInstanceHolder.INSTANCE;
}
// GeckoEventListener implementation
public void handleMessage(String event, JSONObject message) {
Log.i(LOGTAG, "Got message: " + event);
try {
if (event.startsWith("SessionHistory:")) {
Tab tab = getTab(message.getInt("tabID"));
if (tab != null) {
event = event.substring("SessionHistory:".length());
tab.handleSessionHistoryMessage(event, message);
}
} else if (event.equals("Tab:Added")) {
Log.i(LOGTAG, "Received message from Gecko: " + SystemClock.uptimeMillis() + " - Tab:Added");
Tab tab = addTab(message);
if (message.getBoolean("selected"))
selectTab(tab.getId());
if (message.getBoolean("delayLoad"))
tab.setState(Tab.STATE_DELAYED);
} else if (event.equals("Tab:Close")) {
Tab tab = getTab(message.getInt("tabID"));
closeTab(tab);
} else if (event.equals("Tab:Select")) {
selectTab(message.getInt("tabID"));
} else if (event.equals("Session:RestoreBegin")) {
mRestoringSession = true;
} else if (event.equals("Session:RestoreEnd")) {
mRestoringSession = false;
GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
public void run() {
GeckoApp.mBrowserToolbar.refresh();
}
});
}
} catch (Exception e) {
Log.i(LOGTAG, "handleMessage throws " + e + " for message: " + event);
}
}
public void refreshThumbnails() {
Iterator<Tab> iterator = tabs.values().iterator();
while (iterator.hasNext()) {
final Tab tab = iterator.next();
GeckoAppShell.getHandler().post(new Runnable() {
public void run() {
GeckoApp.mAppContext.getAndProcessThumbnailForTab(tab);
}
});
}
}
public interface OnTabsChangedListener {
public void onTabChanged(Tab tab, TabEvents msg);
}
private static ArrayList<OnTabsChangedListener> mTabsChangedListeners;
public static void registerOnTabsChangedListener(OnTabsChangedListener listener) {
if (mTabsChangedListeners == null)
mTabsChangedListeners = new ArrayList<OnTabsChangedListener>();
mTabsChangedListeners.add(listener);
}
public static void unregisterOnTabsChangedListener(OnTabsChangedListener listener) {
if (mTabsChangedListeners == null)
return;
mTabsChangedListeners.remove(listener);
}
public enum TabEvents {
CLOSED,
START,
LOADED,
STOP,
FAVICON,
THUMBNAIL,
TITLE,
SELECTED
}
public void notifyListeners(Tab tab, TabEvents msg) {
if (mTabsChangedListeners == null)
return;
Iterator<OnTabsChangedListener> items = mTabsChangedListeners.iterator();
while (items.hasNext()) {
items.next().onTabChanged(tab, msg);
}
}
}