chrome/browser/resources/bookmarks/app.js

// Copyright 2016 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.

Polymer({
  is: 'bookmarks-app',

  behaviors: [
    bookmarks.MouseFocusBehavior,
    bookmarks.StoreClient,
    FindShortcutBehavior,
  ],

  properties: {
    /** @private */
    searchTerm_: {
      type: String,
      observer: 'searchTermChanged_',
    },

    /** @type {FolderOpenState} */
    folderOpenState_: {
      type: Object,
      observer: 'folderOpenStateChanged_',
    },

    /** @private */
    sidebarWidth_: String,
  },

  /** @private{?function(!Event)} */
  boundUpdateSidebarWidth_: null,

  /** @private {bookmarks.DNDManager} */
  dndManager_: null,

  /** @override */
  attached: function() {
    document.documentElement.classList.remove('loading');

    this.watch('searchTerm_', function(state) {
      return state.search.term;
    });

    this.watch('folderOpenState_', function(state) {
      return state.folderOpenState;
    });

    chrome.bookmarks.getTree((results) => {
      const nodeMap = bookmarks.util.normalizeNodes(results[0]);
      const initialState = bookmarks.util.createEmptyState();
      initialState.nodes = nodeMap;
      initialState.selectedFolder = nodeMap[ROOT_NODE_ID].children[0];
      const folderStateString =
          window.localStorage[LOCAL_STORAGE_FOLDER_STATE_KEY];
      initialState.folderOpenState = folderStateString ?
          new Map(
              /** @type Array<Array<boolean|string>> */ (
                  JSON.parse(folderStateString))) :
          new Map();

      bookmarks.Store.getInstance().init(initialState);
      bookmarks.ApiListener.init();

      setTimeout(function() {
        chrome.metricsPrivate.recordTime(
            'BookmarkManager.ResultsRenderedTime',
            Math.floor(window.performance.now()));
      });

    });

    this.boundUpdateSidebarWidth_ = this.updateSidebarWidth_.bind(this);

    this.initializeSplitter_();

    this.dndManager_ = new bookmarks.DNDManager();
    this.dndManager_.init();
  },

  detached: function() {
    window.removeEventListener('resize', this.boundUpdateSidebarWidth_);
    this.dndManager_.destroy();
    bookmarks.ApiListener.destroy();
  },

  /**
   * Set up the splitter and set the initial width from localStorage.
   * @private
   */
  initializeSplitter_: function() {
    const splitter = this.$.splitter;
    cr.ui.Splitter.decorate(splitter);
    const splitterTarget = this.$.sidebar;

    // The splitter persists the size of the left component in the local store.
    if (LOCAL_STORAGE_TREE_WIDTH_KEY in window.localStorage) {
      splitterTarget.style.width =
          window.localStorage[LOCAL_STORAGE_TREE_WIDTH_KEY];
    }
    this.sidebarWidth_ =
        /** @type {string} */ (getComputedStyle(splitterTarget).width);

    splitter.addEventListener('resize', (e) => {
      window.localStorage[LOCAL_STORAGE_TREE_WIDTH_KEY] =
          splitterTarget.style.width;
      this.updateSidebarWidth_();
    });

    splitter.addEventListener('dragmove', this.boundUpdateSidebarWidth_);
    window.addEventListener('resize', this.boundUpdateSidebarWidth_);
  },

  /** @private */
  updateSidebarWidth_: function() {
    this.sidebarWidth_ =
        /** @type {string} */ (getComputedStyle(this.$.sidebar).width);
  },

  /** @private */
  searchTermChanged_: function(newValue, oldValue) {
    if (oldValue != undefined && !newValue) {
      this.fire(
          'iron-announce', {text: loadTimeData.getString('searchCleared')});
    }

    if (!this.searchTerm_) {
      return;
    }

    chrome.bookmarks.search(this.searchTerm_, (results) => {
      const ids = results.map(function(node) {
        return node.id;
      });
      this.dispatch(bookmarks.actions.setSearchResults(ids));
      this.fire('iron-announce', {
        text: ids.length > 0 ?
            loadTimeData.getStringF('searchResults', this.searchTerm_) :
            loadTimeData.getString('noSearchResults')
      });
    });
  },

  /** @private */
  folderOpenStateChanged_: function() {
    window.localStorage[LOCAL_STORAGE_FOLDER_STATE_KEY] =
        JSON.stringify(Array.from(this.folderOpenState_));
  },

  // Override FindShortcutBehavior methods.
  handleFindShortcut: function(modalContextOpen) {
    if (modalContextOpen) {
      return false;
    }
    this.$$('bookmarks-toolbar').searchField.showAndFocus();
    return true;
  },

  // Override FindShortcutBehavior methods.
  searchInputHasFocus: function() {
    return this.$$('bookmarks-toolbar').searchField.isSearchFocused();
  },

  /** @private */
  onUndoClick_: function() {
    this.fire('command-undo');
  },
});