Add a footer at the bottom of the menu for custom tabs

chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenu.java

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.appmenu;
 
 import android.animation.Animator;
 import android.animation.Animator.AnimatorListener;
 import android.animation.AnimatorSet;
 import android.content.Context;
@@ skipping 115 matching lines @@
     /**
      * Creates and shows the app menu anchored to the specified view.
      *
      * @param context The context of the AppMenu (ensure the proper theme is set on this context).
      * @param anchorView The anchor {@link View} of the {@link ListPopupWindow}.
      * @param isByHardwareButton Whether or not hardware button triggered it. (oppose to software
      *                           button).
      * @param screenRotation Current device screen rotation.
      * @param visibleDisplayFrame The display area rect in which AppMenu is supposed to fit in.
      * @param screenHeight Current device screen height.
+     * @param footerResourceId The resource id for a view to add to the end of the menu list.
+     *                         Can be 0 if no such view is required.
      */
     void show(Context context, View anchorView, boolean isByHardwareButton, int screenRotation,
-            Rect visibleDisplayFrame, int screenHeight) {
+            Rect visibleDisplayFrame, int screenHeight, int footerResourceId) {
         mPopup = new ListPopupWindow(context, null, android.R.attr.popupMenuStyle);
         mPopup.setModal(true);
         mPopup.setAnchorView(anchorView);
         mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
+
+        int footerHeight = 0;
+        if (footerResourceId != 0) {
+            mPopup.setPromptPosition(ListPopupWindow.POSITION_PROMPT_BELOW);
+            mPopup.setPromptView(LayoutInflater.from(context).inflate(footerResourceId, null));
+            footerHeight = context.getResources().getDimensionPixelSize(
+                    R.dimen.menu_footer_height);
+        }
         mPopup.setOnDismissListener(new OnDismissListener() {
             @Override
             public void onDismiss() {
                 if (mPopup.getAnchorView() instanceof ImageButton) {
                     ((ImageButton) mPopup.getAnchorView()).setSelected(false);
                 }
 
                 if (mMenuItemEnterAnimator != null) mMenuItemEnterAnimator.cancel();
 
                 mHandler.appMenuDismissed();
@@ skipping 47 matching lines @@
             originalBgDrawable.getPadding(originalPadding);
             sizingPadding.top = originalPadding.top;
             sizingPadding.bottom = originalPadding.bottom;
         }
 
         // A List adapter for visible items in the Menu. The first row is added as a header to the
         // list view.
         mAdapter = new AppMenuAdapter(this, menuItems, LayoutInflater.from(context));
         mPopup.setAdapter(mAdapter);
 
-        setMenuHeight(menuItems.size(), visibleDisplayFrame, screenHeight, sizingPadding);
+        setMenuHeight(
+                menuItems.size(), visibleDisplayFrame, screenHeight, sizingPadding, footerHeight);
         setPopupOffset(mPopup, mCurrentScreenRotation, visibleDisplayFrame, sizingPadding);
         mPopup.setOnItemClickListener(this);
         mPopup.show();
         mPopup.getListView().setItemsCanFocus(true);
         mPopup.getListView().setOnKeyListener(this);
 
         mHandler.onMenuVisibilityChanged(true);
 
         if (mVerticalFadeDistance > 0) {
             mPopup.getListView().setVerticalFadingEdgeEnabled(true);
@@ skipping 111 matching lines @@
     }
 
     /**
      * @return The menu instance inside of this class.
      */
     @VisibleForTesting
     public Menu getMenuForTest() {
         return mMenu;
     }
 
-    private void setMenuHeight(
-            int numMenuItems, Rect appDimensions, int screenHeight, Rect padding) {
+    private void setMenuHeight(int numMenuItems, Rect appDimensions,
+            int screenHeight, Rect padding, int footerHeight) {
         assert mPopup.getAnchorView() != null;
         View anchorView = mPopup.getAnchorView();
         int[] anchorViewLocation = new int[2];
         anchorView.getLocationOnScreen(anchorViewLocation);
         anchorViewLocation[1] -= appDimensions.top;
         int anchorViewImpactHeight = mIsByHardwareButton ? anchorView.getHeight() : 0;
 
         // Set appDimensions.height() for abnormal anchorViewLocation.
         if (anchorViewLocation[1] > screenHeight) {
             anchorViewLocation[1] = appDimensions.height();
         }
         int availableScreenSpace = Math.max(anchorViewLocation[1],
                 appDimensions.height() - anchorViewLocation[1] - anchorViewImpactHeight);
 
-        availableScreenSpace -= padding.bottom;
+        availableScreenSpace -= padding.bottom + footerHeight;
         if (mIsByHardwareButton) availableScreenSpace -= padding.top;
 
         int numCanFit = availableScreenSpace / (mItemRowHeight + mItemDividerHeight);
 
         // Fade out the last item if we cannot fit all items.
         if (numCanFit < numMenuItems) {
             int spaceForFullItems = numCanFit * (mItemRowHeight + mItemDividerHeight);
             int spaceForPartialItem = (int) (LAST_ITEM_SHOW_FRACTION * mItemRowHeight);
             // Determine which item needs hiding.
             if (spaceForFullItems + spaceForPartialItem < availableScreenSpace) {
@@ skipping 22 matching lines @@
                 } else {
                     builder.with((Animator) animatorObject);
                 }
             }
         }
 
         mMenuItemEnterAnimator.addListener(mAnimationHistogramRecorder);
         mMenuItemEnterAnimator.start();
     }
 }