| // Copyright 2013 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.contextmenu; |
| |
| import android.view.ContextMenu; |
| import android.view.ContextMenu.ContextMenuInfo; |
| import android.view.HapticFeedbackConstants; |
| import android.view.Menu; |
| import android.view.MenuItem; |
| import android.view.MenuItem.OnMenuItemClickListener; |
| import android.view.View; |
| import android.view.View.OnCreateContextMenuListener; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.chromium.base.CalledByNative; |
| import org.chromium.content.browser.ContentView; |
| import org.chromium.content.browser.ContentViewCore; |
| |
| /** |
| * A helper class that handles generating context menus for {@link ContentView}s. |
| */ |
| public class ContextMenuHelper implements OnCreateContextMenuListener, OnMenuItemClickListener { |
| private long mNativeContextMenuHelper; |
| |
| private ContextMenuPopulator mPopulator; |
| private ContextMenuParams mCurrentContextMenuParams; |
| |
| private ContextMenuHelper(long nativeContextMenuHelper) { |
| mNativeContextMenuHelper = nativeContextMenuHelper; |
| } |
| |
| @CalledByNative |
| private static ContextMenuHelper create(long nativeContextMenuHelper) { |
| return new ContextMenuHelper(nativeContextMenuHelper); |
| } |
| |
| @CalledByNative |
| private void destroy() { |
| mNativeContextMenuHelper = 0; |
| } |
| |
| /** |
| * @param populator A {@link ContextMenuPopulator} that is responsible for managing and showing |
| * context menus. |
| */ |
| @CalledByNative |
| private void setPopulator(ContextMenuPopulator populator) { |
| mPopulator = populator; |
| } |
| |
| /** |
| * Starts showing a context menu for {@code view} based on {@code params}. |
| * @param contentViewCore The {@link ContentViewCore} to show the menu to. |
| * @param params The {@link ContextMenuParams} that indicate what menu items to show. |
| */ |
| @CalledByNative |
| private void showContextMenu(ContentViewCore contentViewCore, ContextMenuParams params) { |
| if (!shouldShowMenu(params)) return; |
| |
| mCurrentContextMenuParams = params; |
| |
| View view = contentViewCore.getContainerView(); |
| view.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); |
| if (view instanceof ContentView) ((ContentView) view).setIgnoreRemainingTouchEvents(); |
| view.setOnCreateContextMenuListener(this); |
| view.showContextMenu(); |
| } |
| |
| /** |
| * Starts a download based on the current {@link ContextMenuParams}. |
| * @param isLink Whether or not the download target is a link. |
| */ |
| public void startContextMenuDownload(boolean isLink) { |
| if (mNativeContextMenuHelper != 0) nativeOnStartDownload(mNativeContextMenuHelper, isLink); |
| } |
| |
| @Override |
| public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { |
| if (!shouldShowMenu(mCurrentContextMenuParams)) return; |
| |
| if (mCurrentContextMenuParams.isCustomMenu()) { |
| for (int i = 0; i < mCurrentContextMenuParams.getCustomMenuSize(); i++) { |
| menu.add(Menu.NONE, i, Menu.NONE, mCurrentContextMenuParams.getCustomLabelAt(i)); |
| } |
| } else { |
| assert mPopulator != null; |
| mPopulator.buildContextMenu(menu, v.getContext(), mCurrentContextMenuParams); |
| } |
| |
| for (int i = 0; i < menu.size(); i++) { |
| menu.getItem(i).setOnMenuItemClickListener(this); |
| } |
| } |
| |
| @Override |
| public boolean onMenuItemClick(MenuItem item) { |
| if (mCurrentContextMenuParams.isCustomMenu()) { |
| if (mNativeContextMenuHelper != 0) { |
| final int action = mCurrentContextMenuParams.getCustomActionAt(item.getItemId()); |
| nativeOnCustomItemSelected(mNativeContextMenuHelper, action); |
| } |
| return true; |
| } else { |
| return mPopulator.onItemSelected(this, mCurrentContextMenuParams, item.getItemId()); |
| } |
| } |
| |
| /** |
| * @return The {@link ContextMenuPopulator} responsible for populating the context menu. |
| */ |
| @VisibleForTesting |
| public ContextMenuPopulator getPopulator() { |
| return mPopulator; |
| } |
| |
| private boolean shouldShowMenu(ContextMenuParams params) { |
| // Custom menus are handled by this class and do not require a ContextMenuPopulator. |
| return params.isCustomMenu() || |
| (mPopulator != null && mPopulator.shouldShowContextMenu(params)); |
| } |
| |
| private native void nativeOnStartDownload(long nativeContextMenuHelper, boolean isLink); |
| private native void nativeOnCustomItemSelected(long nativeContextMenuHelper, int action); |
| } |