MD Bookmarks: Proof-of-concept reimplementation of data storage/binding layer

chrome/browser/resources/md_bookmarks/actions.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.
+
+/**
+ * @fileoverview Module for functions which produce action objects. These are
+ * listed in one place to document available actions and their parameters.
+ */
+
+cr.define('bookmarks.actions', function() {
+
+  /**
+   * @param {string} id
+   * @param {{title: string, url: (string|undefined)}} changeInfo
+   * @return {!Action}
+   */
+  function editBookmark(id, changeInfo) {
+    return {
+      name: 'edit-bookmark',
+      id: id,
+      changeInfo: changeInfo,
+    };
+  }
+
+  /**
+   * @param {string} id
+   * @param {string} parentId
+   * @param {number} index
+   * @return {!Action}
+   */
+  function removeBookmark(id, parentId, index) {
+    return {
+      name: 'remove-bookmark',
+      id: id,
+      parentId: parentId,
+      index: index,
+    };
+  }
+
+  /**
+   * @param {NodeList} nodeMap
+   * @return {!Action}
+   */
+  function refreshNodes(nodeMap) {
+    return {
+      name: 'refresh-nodes',
+      nodes: nodeMap,
+    };
+  };
+
+  /**
+   * @param {string} id
+   * @return {!Action}
+   */
+  function selectFolder(id) {
+    return {
+      name: 'select-folder',
+      id: id,
+    };
+  }
+
+  /**
+   * @param {string} id
+   * @param {boolean} open
+   * @return {!Action}
+   */
+  function changeFolderOpen(id, open) {
+    return {
+      name: 'change-folder-open',
+      id: id,
+      open: open,
+    };
+  }
+
+  /**
+   * @param {string} id
+   * @param {boolean} add
+   * @param {boolean} range
+   * @param {BookmarksPageState} state
+   * @return {!Action}
+   */
+  function selectItem(id, add, range, state) {
+    var anchor = state.selection.anchor;
+    var toSelect = [];
+
+    if (range && anchor) {
+      var displayedList = bookmarks.util.getDisplayedList(state);
+      var selectedIndex = displayedList.indexOf(id);
+      assert(selectedIndex != -1);
+      var anchorIndex = displayedList.indexOf(anchor);
+      assert(anchorIndex != -1);
+
+      var startIndex = Math.min(anchorIndex, selectedIndex);
+      var endIndex = Math.max(anchorIndex, selectedIndex);
+
+      for (var i = startIndex; i <= endIndex; i++)
+        toSelect.push(displayedList[i]);
+    } else {
+      toSelect.push(id);
+    }
+
+    return {
+      name: 'select-items',
+      add: add,
+      anchor: id,
+      items: toSelect,
+    };
+  }
+
+  /**
+   * @param {string} term
+   * @return {!Action}
+   */
+  function setSearchTerm(term) {
+    if (!term) {
+      return {name: 'clear-search'};
+    }
+
+    return {
+      name: 'start-search',
+      term: term,
+    };
+  }
+
+  /**
+   * @param {!Array<!BookmarkTreeNode>} nodeList
+   * @return {!Action}
+   */
+  function setSearchResults(nodeList) {
+    return {
+      name: 'finish-search',
+      results: nodeList.map(function(node) {
+        return node.id;
+      }),
+    };
+  }
+
+  return {
+    editBookmark: editBookmark,
+    removeBookmark: removeBookmark,
+    refreshNodes: refreshNodes,
+    selectFolder: selectFolder,
+    changeFolderOpen: changeFolderOpen,
+    selectItem: selectItem,
+    setSearchTerm: setSearchTerm,
+    setSearchResults: setSearchResults,
+  };
+});