Revert "BMM: Split initialization into two phases"

chrome/browser/resources/bookmark_manager/js/main.js

Index: chrome/browser/resources/bookmark_manager/js/main.js
diff --git a/chrome/browser/resources/bookmark_manager/js/main.js b/chrome/browser/resources/bookmark_manager/js/main.js
index d5e157fb5fb0758117cefaa7b93ad98fcba3c23e..4036b48730649800dfc88c1feb5a6ff71a864c32 100644
--- a/chrome/browser/resources/bookmark_manager/js/main.js
+++ b/chrome/browser/resources/bookmark_manager/js/main.js
@@ -144,7 +144,6 @@ function loadLocalizedStrings(data) {
  */
 function updateHash() {
   window.location.hash = tree.selectedItem.bookmarkId;
-  updateAllCommands();
 }
 
 /**
@@ -360,21 +359,12 @@ function getAllUrls(nodes) {
  */
 function getNodesForOpen(target) {
   if (target == tree) {
-    if (tree.selectedItem != searchTreeItem)
-      return tree.selectedFolders;
-    // Fall through to use all nodes in the list.
-  } else {
-    var items = list.selectedItems;
-    if (items.length)
-      return items;
+    var folderItem = tree.selectedItem;
+    return folderItem == searchTreeItem ?
+        list.dataModel.slice() : tree.selectedFolders;
   }
-
-  // The list starts off with a null dataModel. We can get here during startup.
-  if (!list.dataModel)
-    return [];
-
-  // Return an array based on the dataModel.
-  return list.dataModel.slice();
+  var items = list.selectedItems;
+  return items.length ? items : list.dataModel.slice();
 }
 
 /**
@@ -457,8 +447,7 @@ function handleCanExecuteForDocument(e) {
       e.canExecute = true;
       break;
     case 'sort-command':
-      e.canExecute = !list.isSearch() &&
-          list.dataModel && list.dataModel.length > 1;
+      e.canExecute = !list.isSearch() && list.dataModel.length > 1;
       break;
     case 'undo-command':
       // The global undo command has no visible UI, so always enable it, and
@@ -646,12 +635,25 @@ function handleCanExecuteForTree(e) {
 }
 
 /**
- * Update the canExecute state of all the commands.
+ * Update the canExecute state of the commands when the selection changes.
+ * @param {Event} e The change event object.
  */
-function updateAllCommands() {
-  var commands = document.querySelectorAll('command');
-  for (var i = 0; i < commands.length; i++) {
-    commands[i].canExecuteChange();
+function updateCommandsBasedOnSelection(e) {
+  if (e.target == document.activeElement) {
+    // Paste only needs to be updated when the tree selection changes.
+    var commandNames = ['copy', 'cut', 'delete', 'rename-folder', 'edit',
+      'add-new-bookmark', 'new-folder', 'open-in-new-tab',
+      'open-in-background-tab', 'open-in-new-window', 'open-incognito-window',
+      'open-in-same-window', 'show-in-folder'];
+
+    if (e.target == tree) {
+      commandNames.push('paste-from-context-menu', 'paste-from-organize-menu',
+                        'sort');
+    }
+
+    commandNames.forEach(function(baseId) {
+      $(baseId + '-command').canExecuteChange();
+    });
   }
 }
 
@@ -671,7 +673,7 @@ function updateEditingCommands() {
 }
 
 function handleChangeForTree(e) {
-  updateAllCommands();
+  updateCommandsBasedOnSelection(e);
   navigateTo(tree.selectedItem.bookmarkId, updateHash);
 }
 
@@ -1215,11 +1217,7 @@ function initializeBookmarkManager() {
   if (!chrome.bookmarks)
     console.error('Bookmarks extension API is not available');
 
-  chrome.bookmarkManagerPrivate.getStrings(continueInitializeBookmarkManager);
-}
-
-function continueInitializeBookmarkManager(localizedStrings) {
-  loadLocalizedStrings(localizedStrings);
+  chrome.bookmarkManagerPrivate.getStrings(loadLocalizedStrings);
 
   bmm.treeLookup[searchTreeItem.bookmarkId] = searchTreeItem;
 
@@ -1231,7 +1229,7 @@ function continueInitializeBookmarkManager(localizedStrings) {
 
   list.addEventListener('canceledit', handleCancelEdit);
   list.addEventListener('canExecute', handleCanExecuteForList);
-  list.addEventListener('change', updateAllCommands);
+  list.addEventListener('change', updateCommandsBasedOnSelection);
   list.addEventListener('contextmenu', updateEditingCommands);
   list.addEventListener('dblclick', handleDoubleClickForList);
   list.addEventListener('edit', handleEdit);