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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.chrome.browser.enhancedbookmarks; |
| 6 |
| 7 import android.content.Context; |
| 8 |
| 9 import com.google.android.apps.chrome.R; |
| 10 |
| 11 import org.chromium.chrome.browser.BookmarksBridge.BookmarkItem; |
| 12 import org.chromium.chrome.browser.BookmarksBridge.BookmarkModelObserver; |
| 13 import org.chromium.chrome.browser.enhanced_bookmarks.EnhancedBookmarksModel; |
| 14 import org.chromium.chrome.browser.enhanced_bookmarks.EnhancedBookmarksModel.Enh
ancedBookmarkDeleteObserver; |
| 15 import org.chromium.chrome.browser.snackbar.SnackbarManager; |
| 16 |
| 17 import java.util.Locale; |
| 18 |
| 19 /** |
| 20 * Shows an undo bar when the user modifies enhanced bookmarks, |
| 21 * allowing them to undo their changes. |
| 22 * TODO(danduong): Add move undo |
| 23 */ |
| 24 public class EnhancedBookmarkUndoController extends BookmarkModelObserver implem
ents |
| 25 SnackbarManager.SnackbarController, EnhancedBookmarkDeleteObserver { |
| 26 |
| 27 private final EnhancedBookmarksModel mBookmarksModel; |
| 28 private final SnackbarManager mSnackbarManager; |
| 29 private final Context mContext; |
| 30 |
| 31 /** |
| 32 * Creates an instance of {@link EnhancedBookmarkUndoController}. |
| 33 * @param context The {@link Context} in which snackbar is shown. |
| 34 * @param model The enhanced bookmark model. |
| 35 * @param snackbarManager SnackManager passed from activity. |
| 36 */ |
| 37 public EnhancedBookmarkUndoController(Context context, EnhancedBookmarksMode
l model, |
| 38 SnackbarManager snackbarManager) { |
| 39 mBookmarksModel = model; |
| 40 mBookmarksModel.addDeleteObserver(this); |
| 41 mSnackbarManager = snackbarManager; |
| 42 mContext = context; |
| 43 } |
| 44 |
| 45 /** |
| 46 * Cleans up this class, unregistering for application notifications from bo
okmark model. |
| 47 */ |
| 48 public void destroy() { |
| 49 mBookmarksModel.removeDeleteObserver(this); |
| 50 } |
| 51 |
| 52 @Override |
| 53 public void onAction(Object actionData) { |
| 54 mBookmarksModel.undo(); |
| 55 mSnackbarManager.dismissSnackbar(false); |
| 56 } |
| 57 |
| 58 @Override |
| 59 public void onDismissNoAction(Object actionData) { |
| 60 } |
| 61 |
| 62 @Override |
| 63 public void onDismissForEachType(boolean isTimeout) { |
| 64 } |
| 65 |
| 66 // Overriding BookmarkModelObserver |
| 67 @Override |
| 68 public void bookmarkModelChanged() { |
| 69 // TODO(danduong): dismiss snackbar only when needed |
| 70 mSnackbarManager.dismissSnackbar(false); |
| 71 } |
| 72 |
| 73 @Override |
| 74 public void bookmarkNodeChanged(BookmarkItem node) { |
| 75 // Title/url change of a bookmark should not affect undo. |
| 76 } |
| 77 |
| 78 @Override |
| 79 public void bookmarkNodeAdded(BookmarkItem parent, int index) { |
| 80 // Adding a new bookmark should not affect undo. |
| 81 } |
| 82 |
| 83 // Implement EnhancedBookmarkDeleteObserver |
| 84 @Override |
| 85 public void onDeleteBookmarks(String[] titles, boolean isUndoable) { |
| 86 assert titles != null && titles.length >= 1; |
| 87 |
| 88 if (!isUndoable) return; |
| 89 |
| 90 if (titles.length == 1) { |
| 91 mSnackbarManager.showSnackbar(mContext.getString(R.string.undo_bar_d
elete_message), |
| 92 titles[0], mContext.getString(R.string.undo_bar_button_text)
, |
| 93 null, this); |
| 94 } else { |
| 95 mSnackbarManager.showSnackbar( |
| 96 mContext.getString(R.string.undo_bar_multiple_delete_message
), |
| 97 String.format(Locale.getDefault(), "%d", titles.length), |
| 98 mContext.getString(R.string.undo_bar_button_text), null, thi
s); |
| 99 } |
| 100 } |
| 101 } |
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