src/xwalk/runtime/browser/runtime_file_select_helper.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef XWALK_RUNTIME_BROWSER_RUNTIME_FILE_SELECT_HELPER_H_
   6 #define XWALK_RUNTIME_BROWSER_RUNTIME_FILE_SELECT_HELPER_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/gtest_prod_util.h"
  14 #include "content/public/browser/notification_observer.h"
  15 #include "content/public/browser/notification_registrar.h"
  16 #include "content/public/common/file_chooser_params.h"
  17 #include "net/base/directory_lister.h"
  18 #include "ui/shell_dialogs/select_file_dialog.h"
  19
  20 namespace content {
  21 class RenderViewHost;
  22 class WebContents;
  23 }
  24
  25 namespace ui {
  26 struct SelectedFileInfo;
  27 }
  28
  29 // This class handles file-selection requests coming from WebUI elements
  30 // (via the extensions::ExtensionHost class). It implements both the
  31 // initialisation and listener functions for file-selection dialogs.
  32 class RuntimeFileSelectHelper
  33     : public base::RefCountedThreadSafe<RuntimeFileSelectHelper>,
  34       public ui::SelectFileDialog::Listener,
  35       public content::NotificationObserver {
  36  public:
  37   // Show the file chooser dialog.
  38   static void RunFileChooser(content::WebContents* tab,
  39                              const content::FileChooserParams& params);
  40
  41   // Enumerates all the files in directory.
  42   static void EnumerateDirectory(content::WebContents* tab,
  43                                  int request_id,
  44                                  const base::FilePath& path);
  45
  46  private:
  47   friend class base::RefCountedThreadSafe<RuntimeFileSelectHelper>;
  48   FRIEND_TEST_ALL_PREFIXES(RuntimeFileSelectHelperTest, IsAcceptTypeValid);
  49   RuntimeFileSelectHelper();
  50   virtual ~RuntimeFileSelectHelper();
  51
  52   // Utility class which can listen for directory lister events and relay
  53   // them to the main object with the correct tracking id.
  54   class DirectoryListerDispatchDelegate
  55       : public net::DirectoryLister::DirectoryListerDelegate {
  56    public:
  57     DirectoryListerDispatchDelegate(RuntimeFileSelectHelper* parent, int id)
  58         : parent_(parent),
  59           id_(id) {}
  60     virtual ~DirectoryListerDispatchDelegate() {}
  61     void OnListFile(
  62         const net::DirectoryLister::DirectoryListerData& data) override;
  63     void OnListDone(int error) override;
  64    private:
  65     // This RuntimeFileSelectHelper owns this object.
  66     RuntimeFileSelectHelper* parent_;
  67     int id_;
  68
  69     DISALLOW_COPY_AND_ASSIGN(DirectoryListerDispatchDelegate);
  70   };
  71
  72   void RunFileChooser(content::RenderViewHost* render_view_host,
  73                       content::WebContents* web_contents,
  74                       const content::FileChooserParams& params);
  75   void RunFileChooserOnFileThread(
  76       const content::FileChooserParams& params);
  77   void RunFileChooserOnUIThread(
  78       const content::FileChooserParams& params);
  79
  80   // Cleans up and releases this instance. This must be called after the last
  81   // callback is received from the file chooser dialog.
  82   void RunFileChooserEnd();
  83
  84   // SelectFileDialog::Listener overrides.
  85   void FileSelected(
  86       const base::FilePath& path, int index, void* params) override;
  87   void FileSelectedWithExtraInfo(
  88       const ui::SelectedFileInfo& file,
  89       int index,
  90       void* params) override;
  91   void MultiFilesSelected(const std::vector<base::FilePath>& files,
  92                           void* params) override;
  93   void MultiFilesSelectedWithExtraInfo(
  94       const std::vector<ui::SelectedFileInfo>& files,
  95       void* params) override;
  96   void FileSelectionCanceled(void* params) override;
  97
  98   // content::NotificationObserver overrides.
  99   void Observe(int type,
 100                const content::NotificationSource& source,
 101                const content::NotificationDetails& details) override;
 102
 103   void EnumerateDirectory(int request_id,
 104                           content::RenderViewHost* render_view_host,
 105                           const base::FilePath& path);
 106
 107   // Kicks off a new directory enumeration.
 108   void StartNewEnumeration(const base::FilePath& path,
 109                            int request_id,
 110                            content::RenderViewHost* render_view_host);
 111
 112   // Callbacks from directory enumeration.
 113   virtual void OnListFile(
 114       int id,
 115       const net::DirectoryLister::DirectoryListerData& data);
 116   virtual void OnListDone(int id, int error);
 117
 118   // Cleans up and releases this instance. This must be called after the last
 119   // callback is received from the enumeration code.
 120   void EnumerateDirectoryEnd();
 121
 122   // Helper method to get allowed extensions for select file dialog from
 123   // the specified accept types as defined in the spec:
 124   //   http://whatwg.org/html/number-state.html#attr-input-accept
 125   // |accept_types| contains only valid lowercased MIME types or file extensions
 126   // beginning with a period (.).
 127   static scoped_ptr<ui::SelectFileDialog::FileTypeInfo>
 128       GetFileTypesFromAcceptType(
 129         const std::vector<base::string16>& accept_types);
 130
 131   // Check the accept type is valid. It is expected to be all lower case with
 132   // no whitespace.
 133   static bool IsAcceptTypeValid(const std::string& accept_type);
 134
 135   // The RenderViewHost and WebContents for the page showing a file dialog
 136   // (may only be one such dialog).
 137   content::RenderViewHost* render_view_host_;
 138   content::WebContents* web_contents_;
 139
 140   // Dialog box used for choosing files to upload from file form fields.
 141   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 142   scoped_ptr<ui::SelectFileDialog::FileTypeInfo> select_file_types_;
 143
 144   // The type of file dialog last shown.
 145   ui::SelectFileDialog::Type dialog_type_;
 146
 147   content::FileChooserParams::Mode dialog_mode_;
 148
 149   // Maintain a list of active directory enumerations.  These could come from
 150   // the file select dialog or from drag-and-drop of directories, so there could
 151   // be more than one going on at a time.
 152   struct ActiveDirectoryEnumeration;
 153   std::map<int, ActiveDirectoryEnumeration*> directory_enumerations_;
 154
 155   // Registrar for notifications regarding our RenderViewHost.
 156   content::NotificationRegistrar notification_registrar_;
 157
 158   DISALLOW_COPY_AND_ASSIGN(RuntimeFileSelectHelper);
 159 };
 160
 161 #endif  // XWALK_RUNTIME_BROWSER_RUNTIME_FILE_SELECT_HELPER_H_