Add ContextMenu support upstream for Android

chrome/android/java/src/org/chromium/chrome/browser/TabBase.java

Index: chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java b/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
index f80940926ffa39ff634c7ae5ce73d89f7bce5ead..b7490996d55c4529d46cb1f1331f4a0d656613b6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
@@ -7,10 +7,16 @@ package org.chromium.chrome.browser;
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Color;
+import android.view.ContextMenu;
 import android.view.View;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.ObserverList;
+import org.chromium.chrome.browser.contextmenu.ChromeContextMenuPopulator;
+import org.chromium.chrome.browser.contextmenu.ContextMenuParams;
+import org.chromium.chrome.browser.contextmenu.ContextMenuPopulator;
+import org.chromium.chrome.browser.contextmenu.ContextMenuPopulatorWrapper;
+import org.chromium.chrome.browser.contextmenu.EmptyChromeContextMenuItemDelegate;
 import org.chromium.chrome.browser.infobar.AutoLoginProcessor;
 import org.chromium.chrome.browser.infobar.InfoBarContainer;
 import org.chromium.chrome.browser.profiles.Profile;
@@ -22,6 +28,7 @@ import org.chromium.content.browser.NavigationClient;
 import org.chromium.content.browser.NavigationHistory;
 import org.chromium.content.browser.PageInfo;
 import org.chromium.content.browser.WebContentsObserverAndroid;
+import org.chromium.ui.base.Clipboard;
 import org.chromium.ui.base.WindowAndroid;
 
 import java.util.concurrent.atomic.AtomicInteger;
@@ -93,6 +100,37 @@ public abstract class TabBase implements NavigationClient {
     private TabBaseChromeWebContentsDelegateAndroid mWebContentsDelegate;
 
     /**
+     * A default {@link ChromeContextMenuItemDelegate} that supports some of the context menu
+     * functionality.
+     */
+    protected class TabBaseChromeContextMenuItemDelegate
+            extends EmptyChromeContextMenuItemDelegate {
+        private final Clipboard mClipboard;
+
+        /**
+         * Builds a {@link TabBaseChromeContextMenuItemDelegate} instance.
+         */
+        public TabBaseChromeContextMenuItemDelegate() {
+            mClipboard = new Clipboard(getApplicationContext());
+        }
+
+        @Override
+        public boolean isIncognito() {
+            return mIncognito;
+        }
+
+        @Override
+        public void onSaveToClipboard(String text, boolean isUrl) {
+            mClipboard.setText(text, text);
+        }
+
+        @Override
+        public void onSaveImageToClipboard(String url) {
+            mClipboard.setHTMLText("<img src=\"" + url + "\">", url, url);
+        }
+    }
+
+    /**
      * A basic {@link ChromeWebContentsDelegateAndroid} that forwards some calls to the registered
      * {@link TabObserver}s.  Meant to be overridden by subclasses.
      */
@@ -136,6 +174,18 @@ public abstract class TabBase implements NavigationClient {
         }
     }
 
+    private class TabBaseContextMenuPopulator extends ContextMenuPopulatorWrapper {
+        public TabBaseContextMenuPopulator(ContextMenuPopulator populator) {
+            super(populator);
+        }
+
+        @Override
+        public void buildContextMenu(ContextMenu menu, Context context, ContextMenuParams params) {
+            super.buildContextMenu(menu, context, params);
+            for (TabObserver observer : mObservers) observer.onContextMenuShown(TabBase.this, menu);
+        }
+    }
+
     private class TabBaseWebContentsObserverAndroid extends WebContentsObserverAndroid {
         public TabBaseWebContentsObserverAndroid(ContentViewCore contentViewCore) {
             super(contentViewCore);
@@ -470,7 +520,8 @@ public abstract class TabBase implements NavigationClient {
     /**
      * @return An {@link ObserverList.RewindableIterator} instance that points to all of
      *         the current {@link TabObserver}s on this class.  Note that calling
-     *         {@link Iterator#remove()} will throw an {@link UnsupportedOperationException}.
+     *         {@link java.util.Iterator#remove()} will throw an
+     *         {@link UnsupportedOperationException}.
      */
     protected ObserverList.RewindableIterator<TabObserver> getTabObservers() {
         return mObservers.rewindableIterator();
@@ -566,7 +617,8 @@ public abstract class TabBase implements NavigationClient {
 
         assert mNativeTabAndroid != 0;
         nativeInitWebContents(
-                mNativeTabAndroid, mIncognito, mContentViewCore, mWebContentsDelegate);
+                mNativeTabAndroid, mIncognito, mContentViewCore, mWebContentsDelegate,
+                new TabBaseContextMenuPopulator(createContextMenuPopulator()));
 
         // In the case where restoring a Tab or showing a prerendered one we already have a
         // valid infobar container, no need to recreate one.
@@ -672,6 +724,14 @@ public abstract class TabBase implements NavigationClient {
     }
 
     /**
+     * A helper method to allow subclasses to build their own menu populator.
+     * @return An instance of a {@link ContextMenuPopulator}.
+     */
+    protected ContextMenuPopulator createContextMenuPopulator() {
+        return new ChromeContextMenuPopulator(new TabBaseChromeContextMenuItemDelegate());
+    }
+
+    /**
      * @return The {@link WindowAndroid} associated with this {@link TabBase}.
      */
     protected WindowAndroid getWindowAndroid() {
@@ -775,7 +835,8 @@ public abstract class TabBase implements NavigationClient {
     }
 
     private native void nativeInitWebContents(long nativeTabAndroid, boolean incognito,
-            ContentViewCore contentViewCore, ChromeWebContentsDelegateAndroid delegate);
+            ContentViewCore contentViewCore, ChromeWebContentsDelegateAndroid delegate,
+            ContextMenuPopulator contextMenuPopulator);
     private native void nativeDestroyWebContents(long nativeTabAndroid, boolean deleteNative);
     private native Profile nativeGetProfileAndroid(long nativeTabAndroid);
     private native int nativeGetSecurityLevel(long nativeTabAndroid);