Adding a format device button to UI.

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 f3f490c84969ee016d510aee70dce34fd0bf2908..caa833f3f7ea7f01b0e85ad494341be15360e1ac 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -1471,6 +1471,7 @@ FileManager.prototype = {
     if (this.dialogType_ == FileManager.DialogType.FULL_PAGE) {
       // Since unmount task cannot be defined in terms of file patterns,
       // we manually include it here, if all selected items are mount points.
+      this.taskButtons_.innerHTML = '';
       chrome.fileBrowserPrivate.getFileTasks(
           selection.urls,
           this.onTasksFound_.bind(this,
@@ -1549,8 +1550,6 @@ FileManager.prototype = {
           title: ''
       });
     }
-
-    this.taskButtons_.innerHTML = '';
     for (var i = 0; i < tasksList.length; i++) {
       var task = tasksList[i];
 
@@ -1586,20 +1585,74 @@ FileManager.prototype = {
           task.title = str('UNMOUNT_ARCHIVE');
         }
       }
+      this.renderTaskButton_(task);
+    }
+    // This needs to be done in sparate function, as check requires
+    // asynchronous function calls.
+    this.maybeRenderFormattingTask_();
+  };
+
+  FileManager.prototype.renderTaskButton_ = function(task) {
+    var button = this.document_.createElement('button');
+    button.addEventListener('click', this.onTaskButtonClicked_.bind(this));
+    button.className = 'task-button';
+    button.task = task;
+
+    var img = this.document_.createElement('img');
+    img.src = task.iconUrl;
+
+    button.appendChild(img);
+    button.appendChild(this.document_.createTextNode(task.title));
 
-      var button = this.document_.createElement('button');
-      button.addEventListener('click', this.onTaskButtonClicked_.bind(this));
-      button.className = 'task-button';
-      button.task = task;
+    this.taskButtons_.appendChild(button);
+  };
 
-      var img = this.document_.createElement('img');
-      img.src = task.iconUrl;
+  /**
+   * Checks whether formatting task should be displayed and if the answer is
+   * affirmative renders it. Includes asynchronous calls, so it's splitted into
+   * three parts.
+   */
+  FileManager.prototype.maybeRenderFormattingTask_ = function() {
+    // Not to make unnecesary getMountPoints() call we doublecheck if there is
+    // only one selected entry.
+    if(this.selection.entries.length != 1)
+      return;
 
-      button.appendChild(img);
-      button.appendChild(this.document_.createTextNode(task.title));
+    function onMountPointsFound(mountPoints) {
+      this.mountPoints_ = mountPoints;
 
-      this.taskButtons_.appendChild(button);
+      function normalize(x) {
+        if(x[0] == '/')
+          return x.slice(1);
+        else
+          return x;
+      }
+
+      function onVolumeMetadataFound(volumeMetadata) {

[tbarzic, 2011/08/11 00:58:18]

what if selection has changed by now?

[sidor, 2011/08/11 04:28:51]

Hmm... Then we are screwed. But hey, to change the selection we need user
clicking right? So it shouldn't be a problem. 

Especially that this call don't go the any of libcros packets right? Metadata is
cached?

[tbarzic, 2011/08/11 04:49:48]

maybe you could do something like
if (this.selection.entries.length != 1 ||
    '/media/'+this.selection.entries[0].fullPath != volumeMetadata.mountPath)
  return;

[sidor.dev, 2011/08/11 18:39:43]

Done.

+        if (volumeMetadata.deviceType == "flash") {
+          var task = {
+            taskId: this.getExtensionId_() + '|format-device',
+            iconUrl: chrome.extension.getURL('images/filetype_generic.png'),
+            title: str('FORMAT_DEVICE')
+          };
+          this.renderTaskButton_(task);
+        }
+      }
+
+      if(this.selection.entries.length != 1)
+        return;
+      var maybeMountPath = this.selection.entries[0].fullPath;

[tbarzic, 2011/08/11 00:58:18]

why  maybe here?

[sidor, 2011/08/11 04:28:51]

Because it might be a regular directory path. 

[tbarzic, 2011/08/11 04:49:48]

maybe entryPath or selectedPath would be better name...

[sidor.dev, 2011/08/11 18:39:43]

Done.

+      for (var i = 0; i < mountPoints.length; i++) {
+        if (mountPoints[i].mountType == "device" &&
+            normalize(mountPoints[i].mountPath) == normalize(maybeMountPath)) {
+          chrome.fileBrowserPrivate.getVolumeMetadata(mountPoints[i].sourceUrl,
+              onVolumeMetadataFound.bind(this));
+          return;
+        }
+      }
     }
+
+    chrome.fileBrowserPrivate.getMountPoints(onMountPointsFound.bind(this));
   };
 
   FileManager.prototype.getExtensionId_ = function() {
@@ -1666,6 +1719,10 @@ FileManager.prototype = {
       for (var index = 0; index < urls.length; ++index) {
         chrome.fileBrowserPrivate.removeMount(urls[index]);
       }
+    } else if (id == 'format-device') {
+      if (!confirm(str('FORMATTING_WARNING')))
+        return;
+      chrome.fileBrowserPrivate.formatDevice(urls[0]);
     }
   };