Media Galleries: Add chrome.mediaGalleries.addUserSelectedFolder().

chrome/browser/extensions/api/media_galleries/media_galleries_api.cc

Index: chrome/browser/extensions/api/media_galleries/media_galleries_api.cc
===================================================================
--- chrome/browser/extensions/api/media_galleries/media_galleries_api.cc	(revision 243397)
+++ chrome/browser/extensions/api/media_galleries/media_galleries_api.cc	(working copy)
@@ -18,11 +18,14 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/api/file_system/file_system_api.h"
 #include "chrome/browser/extensions/blob_reader.h"
+#include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/media_galleries/media_file_system_registry.h"
 #include "chrome/browser/media_galleries/media_galleries_dialog_controller.h"
 #include "chrome/browser/media_galleries/media_galleries_histograms.h"
 #include "chrome/browser/media_galleries/media_galleries_preferences.h"
+#include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/storage_monitor/storage_info.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
@@ -35,10 +38,13 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_view.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "extensions/common/permissions/permissions_data.h"
+#include "grit/generated_resources.h"
 #include "net/base/mime_sniffer.h"
+#include "ui/base/l10n/l10n_util.h"
 
 using content::WebContents;
 using web_modal::WebContentsModalDialogManager;
@@ -76,6 +82,146 @@
   return g_browser_process->media_file_system_registry();
 }
 
+WebContents* GetWebContents(content::RenderViewHost* rvh,
+                            Profile* profile,
+                            const std::string& app_id) {
+  WebContents* contents = WebContents::FromRenderViewHost(rvh);
+  WebContentsModalDialogManager* web_contents_modal_dialog_manager =
+      WebContentsModalDialogManager::FromWebContents(contents);
+  if (!web_contents_modal_dialog_manager) {
+    // If there is no WebContentsModalDialogManager, then this contents is
+    // probably the background page for an app. Try to find a shell window to
+    // host the dialog.
+    apps::ShellWindow* window = apps::ShellWindowRegistry::Get(
+        profile)->GetCurrentShellWindowForApp(app_id);
+    contents = window ? window->web_contents() : NULL;
+  }
+  return contents;
+}
+
+base::ListValue* ConstructFileSystemList(
+    content::RenderViewHost* rvh,
+    const Extension* extension,
+    const std::vector<MediaFileSystemInfo>& filesystems) {
+  if (!rvh)
+    return NULL;
+
+  MediaGalleriesPermission::CheckParam read_param(
+      MediaGalleriesPermission::kReadPermission);
+  bool has_read_permission = PermissionsData::CheckAPIPermissionWithParam(
+      extension, APIPermission::kMediaGalleries, &read_param);
+  MediaGalleriesPermission::CheckParam copy_to_param(
+      MediaGalleriesPermission::kCopyToPermission);
+  bool has_copy_to_permission = PermissionsData::CheckAPIPermissionWithParam(
+      extension, APIPermission::kMediaGalleries, &copy_to_param);
+  MediaGalleriesPermission::CheckParam delete_param(
+      MediaGalleriesPermission::kDeletePermission);
+  bool has_delete_permission = PermissionsData::CheckAPIPermissionWithParam(
+      extension, APIPermission::kMediaGalleries, &delete_param);
+
+  const int child_id = rvh->GetProcess()->GetID();
+  scoped_ptr<base::ListValue> list(new base::ListValue());
+  for (size_t i = 0; i < filesystems.size(); ++i) {
+    scoped_ptr<base::DictionaryValue> file_system_dict_value(
+        new base::DictionaryValue());
+
+    // Send the file system id so the renderer can create a valid FileSystem
+    // object.
+    file_system_dict_value->SetStringWithoutPathExpansion(
+        "fsid", filesystems[i].fsid);
+
+    file_system_dict_value->SetStringWithoutPathExpansion(
+        kNameKey, filesystems[i].name);
+    file_system_dict_value->SetStringWithoutPathExpansion(
+        kGalleryIdKey,
+        base::Uint64ToString(filesystems[i].pref_id));
+    if (!filesystems[i].transient_device_id.empty()) {
+      file_system_dict_value->SetStringWithoutPathExpansion(
+          kDeviceIdKey, filesystems[i].transient_device_id);
+    }
+    file_system_dict_value->SetBooleanWithoutPathExpansion(
+        kIsRemovableKey, filesystems[i].removable);
+    file_system_dict_value->SetBooleanWithoutPathExpansion(
+        kIsMediaDeviceKey, filesystems[i].media_device);
+    file_system_dict_value->SetBooleanWithoutPathExpansion(
+        kIsAvailableKey, true);
+
+    list->Append(file_system_dict_value.release());
+
+    if (filesystems[i].path.empty())
+      continue;
+
+    if (has_read_permission) {
+      content::ChildProcessSecurityPolicy* policy =
+          content::ChildProcessSecurityPolicy::GetInstance();
+      policy->GrantReadFileSystem(child_id, filesystems[i].fsid);
+      if (has_delete_permission) {
+        policy->GrantDeleteFromFileSystem(child_id, filesystems[i].fsid);
+        if (has_copy_to_permission) {
+          policy->GrantCopyIntoFileSystem(child_id, filesystems[i].fsid);
+        }
+      }
+    }
+  }
+
+  return list.release();
+}
+
+class SelectDirectoryDialog : public ui::SelectFileDialog::Listener,
+                              public base::RefCounted<SelectDirectoryDialog> {
+ public:
+  // Selected file path, or an empty path if the user canceled.
+  typedef base::Callback<void(const base::FilePath&)> Callback;
+
+  SelectDirectoryDialog(WebContents* web_contents, const Callback& callback)
+      : web_contents_(web_contents),
+        callback_(callback) {
+    select_file_dialog_ = ui::SelectFileDialog::Create(
+        this, new ChromeSelectFilePolicy(web_contents));
+  }
+
+  void Show(const base::FilePath& default_path) {
+    AddRef();  // Balanced in the two reachable listener outcomes.
+    select_file_dialog_->SelectFile(
+      ui::SelectFileDialog::SELECT_FOLDER,
+      l10n_util::GetStringUTF16(IDS_MEDIA_GALLERIES_DIALOG_ADD_GALLERY_TITLE),
+      default_path,
+      NULL,
+      0,
+      base::FilePath::StringType(),
+      platform_util::GetTopLevel(web_contents_->GetView()->GetNativeView()),
+      NULL);
+  }
+
+  // ui::SelectFileDialog::Listener implementation.
+  virtual void FileSelected(const base::FilePath& path,
+                            int index,
+                            void* params) OVERRIDE {
+    callback_.Run(path);
+    Release();  // Balanced in Show().
+  }
+
+  virtual void MultiFilesSelected(const std::vector<base::FilePath>& files,
+                                  void* params) OVERRIDE {
+    NOTREACHED() << "Should not be able to select multiple files";
+  }
+
+  virtual void FileSelectionCanceled(void* params) OVERRIDE {
+    callback_.Run(base::FilePath());
+    Release();  // Balanced in Show().
+  }
+
+ private:
+  friend class base::RefCounted<SelectDirectoryDialog>;
+  virtual ~SelectDirectoryDialog() {}
+
+  scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
+  WebContents* web_contents_;
+  Callback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(SelectDirectoryDialog);
+};
+
 }  // namespace
 
 MediaGalleriesGetMediaFileSystemsFunction::
@@ -153,96 +299,28 @@
 
 void MediaGalleriesGetMediaFileSystemsFunction::ReturnGalleries(
     const std::vector<MediaFileSystemInfo>& filesystems) {
-  content::RenderViewHost* rvh = render_view_host();
-  if (!rvh) {
+  scoped_ptr<base::ListValue> list(
+      ConstructFileSystemList(render_view_host(), GetExtension(), filesystems));
+  if (!list.get()) {
     SendResponse(false);
     return;
   }
-  MediaGalleriesPermission::CheckParam read_param(
-      MediaGalleriesPermission::kReadPermission);
-  bool has_read_permission = PermissionsData::CheckAPIPermissionWithParam(
-      GetExtension(), APIPermission::kMediaGalleries, &read_param);
-  MediaGalleriesPermission::CheckParam copy_to_param(
-      MediaGalleriesPermission::kCopyToPermission);
-  bool has_copy_to_permission = PermissionsData::CheckAPIPermissionWithParam(
-      GetExtension(), APIPermission::kMediaGalleries, &copy_to_param);
-  MediaGalleriesPermission::CheckParam delete_param(
-      MediaGalleriesPermission::kDeletePermission);
-  bool has_delete_permission = PermissionsData::CheckAPIPermissionWithParam(
-      GetExtension(), APIPermission::kMediaGalleries, &delete_param);
 
-  const int child_id = rvh->GetProcess()->GetID();
-  base::ListValue* list = new base::ListValue();
-  for (size_t i = 0; i < filesystems.size(); i++) {
-    scoped_ptr<base::DictionaryValue> file_system_dict_value(
-        new base::DictionaryValue());
-
-    // Send the file system id so the renderer can create a valid FileSystem
-    // object.
-    file_system_dict_value->SetStringWithoutPathExpansion(
-        "fsid", filesystems[i].fsid);
-
-    file_system_dict_value->SetStringWithoutPathExpansion(
-        kNameKey, filesystems[i].name);
-    file_system_dict_value->SetStringWithoutPathExpansion(
-        kGalleryIdKey,
-        base::Uint64ToString(filesystems[i].pref_id));
-    if (!filesystems[i].transient_device_id.empty()) {
-      file_system_dict_value->SetStringWithoutPathExpansion(
-          kDeviceIdKey, filesystems[i].transient_device_id);
-    }
-    file_system_dict_value->SetBooleanWithoutPathExpansion(
-        kIsRemovableKey, filesystems[i].removable);
-    file_system_dict_value->SetBooleanWithoutPathExpansion(
-        kIsMediaDeviceKey, filesystems[i].media_device);
-    file_system_dict_value->SetBooleanWithoutPathExpansion(
-        kIsAvailableKey, true);
-
-    list->Append(file_system_dict_value.release());
-
-    if (filesystems[i].path.empty())
-      continue;
-
-    if (has_read_permission) {
-      content::ChildProcessSecurityPolicy* policy =
-          content::ChildProcessSecurityPolicy::GetInstance();
-      policy->GrantReadFileSystem(child_id, filesystems[i].fsid);
-      if (has_delete_permission) {
-        policy->GrantDeleteFromFileSystem(child_id, filesystems[i].fsid);
-        if (has_copy_to_permission) {
-          policy->GrantCopyIntoFileSystem(child_id, filesystems[i].fsid);
-        }
-      }
-    }
-  }
-
   // The custom JS binding will use this list to create DOMFileSystem objects.
-  SetResult(list);
+  SetResult(list.release());
   SendResponse(true);
 }
 
 void MediaGalleriesGetMediaFileSystemsFunction::ShowDialog() {
   media_galleries::UsageCount(media_galleries::SHOW_DIALOG);
-  WebContents* contents = WebContents::FromRenderViewHost(render_view_host());
-  WebContentsModalDialogManager* web_contents_modal_dialog_manager =
-      WebContentsModalDialogManager::FromWebContents(contents);
-  if (!web_contents_modal_dialog_manager) {
-    // If there is no WebContentsModalDialogManager, then this contents is
-    // probably the background page for an app. Try to find a shell window to
-    // host the dialog.
-    apps::ShellWindow* window = apps::ShellWindowRegistry::Get(
-        GetProfile())->GetCurrentShellWindowForApp(GetExtension()->id());
-    if (!window) {
-      SendResponse(false);
-      return;
-    }
-    contents = window->web_contents();
-  }
+  const Extension* extension = GetExtension();
+  WebContents* contents =
+      GetWebContents(render_view_host(), GetProfile(), extension->id());
 
   // Controller will delete itself.
   base::Closure cb = base::Bind(
       &MediaGalleriesGetMediaFileSystemsFunction::GetAndReturnGalleries, this);
-  new MediaGalleriesDialogController(contents, *GetExtension(), cb);
+  new MediaGalleriesDialogController(contents, *extension, cb);
 }
 
 void MediaGalleriesGetMediaFileSystemsFunction::GetMediaFileSystemsForExtension(
@@ -325,6 +403,103 @@
   SendResponse(true);
 }
 
+MediaGalleriesAddUserSelectedFolderFunction::
+    ~MediaGalleriesAddUserSelectedFolderFunction() {}
+
+bool MediaGalleriesAddUserSelectedFolderFunction::RunImpl() {
+  if (!ApiIsAccessible(&error_))
+    return false;
+
+  media_galleries::UsageCount(media_galleries::ADD_USER_SELECTED_FOLDER);
+  MediaGalleriesPreferences* preferences =
+      media_file_system_registry()->GetPreferences(GetProfile());
+  preferences->EnsureInitialized(base::Bind(
+      &MediaGalleriesAddUserSelectedFolderFunction::OnPreferencesInit,
+      this));
+  return true;
+}
+
+void MediaGalleriesAddUserSelectedFolderFunction::OnPreferencesInit() {
+  Profile* profile = GetProfile();
+  const std::string& app_id = GetExtension()->id();
+  WebContents* contents = GetWebContents(render_view_host(), profile, app_id);
+  base::FilePath last_used_path =
+      extensions::file_system_api::GetLastChooseEntryDirectory(
+          extensions::ExtensionPrefs::Get(profile), app_id);
+  SelectDirectoryDialog::Callback callback = base::Bind(
+      &MediaGalleriesAddUserSelectedFolderFunction::OnDirectorySelected, this);
+  scoped_refptr<SelectDirectoryDialog> select_directory_dialog =
+      new SelectDirectoryDialog(contents, callback);
+  select_directory_dialog->Show(last_used_path);
+}
+
+void MediaGalleriesAddUserSelectedFolderFunction::OnDirectorySelected(
+    const base::FilePath& selected_directory) {
+  if (selected_directory.empty()) {
+    // User cancelled case.
+    GetMediaFileSystemsForExtension(base::Bind(
+        &MediaGalleriesAddUserSelectedFolderFunction::ReturnGalleriesAndId,
+        this,
+        kInvalidMediaGalleryPrefId));
+    return;
+  }
+
+  extensions::file_system_api::SetLastChooseEntryDirectory(
+      extensions::ExtensionPrefs::Get(GetProfile()),
+      GetExtension()->id(),
+      selected_directory);
+
+  MediaGalleriesPreferences* preferences =
+      media_file_system_registry()->GetPreferences(GetProfile());
+  MediaGalleryPrefId pref_id =
+      preferences->AddGalleryByPath(selected_directory);
+  preferences->SetGalleryPermissionForExtension(*GetExtension(), pref_id, true);
+
+  GetMediaFileSystemsForExtension(base::Bind(
+      &MediaGalleriesAddUserSelectedFolderFunction::ReturnGalleriesAndId,
+      this,
+      pref_id));
+}
+
+void MediaGalleriesAddUserSelectedFolderFunction::ReturnGalleriesAndId(
+    MediaGalleryPrefId pref_id,
+    const std::vector<MediaFileSystemInfo>& filesystems) {
+  scoped_ptr<base::ListValue> list(
+      ConstructFileSystemList(render_view_host(), GetExtension(), filesystems));
+  if (!list.get()) {
+    SendResponse(false);
+    return;
+  }
+
+  std::string fsid;
+  if (pref_id != kInvalidMediaGalleryPrefId) {
+    for (size_t i = 0; i < filesystems.size(); ++i) {
+      if (filesystems[i].pref_id == pref_id) {
+        fsid = filesystems[i].fsid;
+        break;
+      }
+    }
+  }
+  base::DictionaryValue* results = new base::DictionaryValue;
+  results->SetWithoutPathExpansion("mediaFileSystems", list.release());
+  results->SetStringWithoutPathExpansion("selectedFileSystemName", fsid);

[vandebo (ex-Chrome), 2014/01/09 16:17:29]

It looks like this value gets to the user unmolested.  Is fsid a useful
identifier?

[Lei Zhang, 2014/01/10 00:16:13]

Nope, fixed in patch set 9.

+  SetResult(results);
+  SendResponse(true);
+}
+
+void
+MediaGalleriesAddUserSelectedFolderFunction::GetMediaFileSystemsForExtension(
+    const MediaFileSystemsCallback& cb) {
+  if (!render_view_host()) {
+    cb.Run(std::vector<MediaFileSystemInfo>());
+    return;
+  }
+  MediaFileSystemRegistry* registry = media_file_system_registry();
+  DCHECK(registry->GetPreferences(GetProfile())->IsInitialized());
+  registry->GetMediaFileSystemsForExtension(
+      render_view_host(), GetExtension(), cb);
+}
+
 MediaGalleriesGetMetadataFunction::~MediaGalleriesGetMetadataFunction() {}
 
 bool MediaGalleriesGetMetadataFunction::RunImpl() {