chrome/browser/ui/webui/theme_source.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 CHROME_BROWSER_UI_WEBUI_THEME_SOURCE_H_
   6 #define CHROME_BROWSER_UI_WEBUI_THEME_SOURCE_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "content/public/browser/url_data_source.h"
  13
  14 class Profile;
  15
  16 namespace base {
  17 class RefCountedMemory;
  18 }
  19
  20 class ThemeSource : public content::URLDataSource {
  21  public:
  22   explicit ThemeSource(Profile* profile);
  23   ~ThemeSource() override;
  24
  25   // content::URLDataSource implementation.
  26   std::string GetSource() const override;
  27   void StartDataRequest(
  28       const std::string& path,
  29       int render_process_id,
  30       int render_frame_id,
  31       const content::URLDataSource::GotDataCallback& callback) override;
  32   std::string GetMimeType(const std::string& path) const override;
  33   base::MessageLoop* MessageLoopForRequestPath(
  34       const std::string& path) const override;
  35   bool ShouldReplaceExistingSource() const override;
  36   bool ShouldServiceRequest(const net::URLRequest* request) const override;
  37
  38  private:
  39   // Fetch and send the theme bitmap.
  40   void SendThemeBitmap(const content::URLDataSource::GotDataCallback& callback,
  41                        int resource_id,
  42                        float scale_factor);
  43
  44   // Similar to SendThemeBitmap but treat the responded data as image; if the
  45   // resource bundle does not contain the data for |scale_factor|, the resource
  46   // bundle falls back to the data of a lower scale, which means smaller images
  47   // will be served and webui handles the image incorrectly.
  48   // See crbug.com/442384.
  49   void SendThemeImage(const content::URLDataSource::GotDataCallback& callback,
  50                       int resource_id,
  51                       float scale_factor);
  52
  53   // The original profile (never an OTR profile).
  54   Profile* profile_;
  55
  56   // We grab the CSS early so we don't have to go back to the UI thread later.
  57   scoped_refptr<base::RefCountedMemory> css_bytes_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(ThemeSource);
  60 };
  61
  62 #endif  // CHROME_BROWSER_UI_WEBUI_THEME_SOURCE_H_