[File Manager] Properly enable/disable Copy and Open for GData files in the offline mode.

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager.js b/chrome/browser/resources/file_manager/js/file_manager.js
index 247988fe2a40ce58b2417fd6727ce0fcef5d8afd..9e7d3c7435905eefd364dbd02d13890f0d8e5444 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -542,7 +542,8 @@ FileManager.prototype = {
         this.directoryModel_.fileListSelection,
         GridItem.bind(null, this),
         this.copyManager_,
-        this.directoryModel_);
+        this.directoryModel_,
+        this.commands_);
     controller.attachDragSource(this.table_.list);
     controller.attachDropTarget(this.table_.list);
     controller.attachDragSource(this.grid_);
@@ -1906,7 +1907,7 @@ FileManager.prototype = {
       if (entry.gdata_.isHosted) {
         listItem.classList.add('gdata-hosted');
       }
-      if (entry.isDirectory || FileManager.isAvaliableOffline_(entry.gdata_)) {
+      if (entry.isDirectory || FileType.isAvaliableOffline_(entry.gdata_)) {
         listItem.classList.add('gdata-present');
       }
     }.bind(this));
@@ -2038,7 +2039,7 @@ FileManager.prototype = {
 
   FileManager.prototype.displayDateInDiv_ = function(div, filesystemProps) {
     if (!filesystemProps) return;
-    if (this.directoryModel_.isSystemDirectoy &&
+    if (this.directoryModel_.isSystemDirectory &&
         filesystemProps.modificationTime.getTime() == 0) {
       // Mount points for FAT volumes have this time associated with them.
       // We'd rather display nothing than this bogus date.
@@ -2151,6 +2152,7 @@ FileManager.prototype = {
       directoryCount: 0,
       bytes: 0,
       showBytes: false,
+      allGDataFilesPresent: false,
       iconType: null,
       indexes: this.currentList_.selectionModel.selectedIndexes
     };
@@ -2265,6 +2267,14 @@ FileManager.prototype = {
 
       this.dispatchEvent(new cr.Event('selection-summarized'));
     }.bind(this));
+
+    if (this.isOnGData()) {
+      FileType.checkOfflineAvailability(
+          selection.entries, selection.urls, function(result) {
+        selection.allGDataFilesPresent = result;
+        this.updateOkButton_();
+      }.bind(this));
+    }
   };
 
   /**
@@ -2386,8 +2396,7 @@ FileManager.prototype = {
 
 
   FileManager.prototype.isOnGData = function() {
-    return this.directoryModel_ &&
-        this.directoryModel_.rootPath == '/' + DirectoryModel.GDATA_DIRECTORY;
+    return this.directoryModel_.isOnGData;
   };
 
   FileManager.prototype.getMetadataProvider = function() {
@@ -2574,18 +2583,17 @@ FileManager.prototype = {
 
   FileManager.prototype.executeIfAvailable_ = function(urls, callback) {
     if (this.isOnGDataOffline()) {
-      chrome.fileBrowserPrivate.getGDataFileProperties(urls, function(props) {
-        for (var i = 0; i != props.length; i++) {
-          if (!FileManager.isAvaliableOffline_(props[i])) {
-            this.alert.showHtml(
-                str('OFFLINE_HEADER'),
-                strf(
-                    urls.length == 1 ?
-                        'OFFLINE_MESSAGE' :
-                        'OFFLINE_MESSAGE_PLURAL',
-                    str('OFFLINE_COLUMN_LABEL')));
-            return;
-          }
+      FileType.checkOfflineAvailability(
+          null /* entries */, urls, function(result) {
+        if (!result) {
+          this.alert.showHtml(
+              str('OFFLINE_HEADER'),
+              strf(
+                  urls.length == 1 ?
+                      'OFFLINE_MESSAGE' :
+                      'OFFLINE_MESSAGE_PLURAL',
+                  str('OFFLINE_COLUMN_LABEL')));
+          return;
         }
         callback(urls);
       }.bind(this));
@@ -2594,10 +2602,6 @@ FileManager.prototype = {
     }
   };
 
-  FileManager.isAvaliableOffline_ = function(gdata) {
-    return gdata.isPresent && !gdata.isHosted;
-  };
-
   FileManager.prototype.isOffline = function() {
     return !navigator.onLine;
   };
@@ -2611,6 +2615,7 @@ FileManager.prototype = {
       this.dialogContainer_.removeAttribute('offline');
     }
     this.directoryModel_.offline = this.isOffline();
+    this.updateOkButton_();
   };
 
   FileManager.prototype.isOnGDataOffline = function() {
@@ -3288,18 +3293,32 @@ FileManager.prototype = {
       this.updateSelectAllCheckboxState_(selectAllCheckbox);
   };
 
+  /**
+    * Check if all the files in the current selection are available. The only
+    * case when files might be not available is when the selection contains
+    * uncached GData files and the browser is offline.
+    * @return {boolean} True if all files in the current selection are available.
+    */
+  FileManager.prototype.isSelectionAvailable = function() {
+    return !this.isOnGDataOffline() || this.selection.allGDataFilesPresent;
+  };
+
   FileManager.prototype.updateOkButton_ = function(event) {
     var selectable;
 
-    if (this.dialogType_ == FileManager.DialogType.SELECT_FOLDER) {
+    if (!this.selection) {
+      selectable = false;
+    } else if (this.dialogType_ == FileManager.DialogType.SELECT_FOLDER) {
       selectable = this.selection.directoryCount == 1 &&
           this.selection.fileCount == 0;
     } else if (this.dialogType_ == FileManager.DialogType.SELECT_OPEN_FILE) {
-      selectable = (this.selection.directoryCount == 0 &&
+      selectable = (this.isSelectionAvailable() &&
+                    this.selection.directoryCount == 0 &&
                     this.selection.fileCount == 1);
     } else if (this.dialogType_ ==
                FileManager.DialogType.SELECT_OPEN_MULTI_FILE) {
-      selectable = (this.selection.directoryCount == 0 &&
+      selectable = (this.isSelectionAvailable() &&
+                    this.selection.directoryCount == 0 &&
                     this.selection.fileCount >= 1);
     } else if (this.dialogType_ == FileManager.DialogType.SELECT_SAVEAS_FILE) {
       if (this.isOnReadonlyDirectory()) {