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      1 // Copyright (c) 2011 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_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_
      6 #define CHROME_BROWSER_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_
      7 #pragma once
      8 
      9 #include <string>
     10 
     11 #include "chrome/browser/chromeos/login/image_decoder.h"
     12 #include "googleurl/src/gurl.h"
     13 #include "views/controls/button/button.h"
     14 #include "views/controls/textfield/textfield_controller.h"
     15 #include "views/window/dialog_delegate.h"
     16 
     17 namespace views {
     18 class ImageView;
     19 class TextButton;
     20 class View;
     21 class Window;
     22 }  // namespace views
     23 
     24 namespace chromeos {
     25 
     26 // A dialog box that shows a CAPTCHA image and allows user to input response.
     27 class CaptchaView : public views::View,
     28                     public views::DialogDelegate,
     29                     public views::TextfieldController,
     30                     public ImageDecoder::Delegate,
     31                     public views::ButtonListener {
     32  public:
     33   class Delegate {
     34    public:
     35     // Called when CAPTCHA answer has been entered.
     36     virtual void OnCaptchaEntered(const std::string& captcha) = 0;
     37 
     38    protected:
     39      virtual ~Delegate() {}
     40   };
     41 
     42   // |captcha_url| represents CAPTCHA image URL.
     43   // |is_standalone| is true when CaptchaView is not presented as dialog.
     44   CaptchaView(const GURL& captcha_url, bool is_standalone);
     45   virtual ~CaptchaView() {}
     46 
     47   // views::DialogDelegate:
     48   virtual bool Accept();
     49   virtual bool IsModal() const { return true; }
     50   virtual views::View* GetContentsView() { return this; }
     51   virtual std::wstring GetWindowTitle() const;
     52 
     53   // views::TextfieldController:
     54   virtual void ContentsChanged(views::Textfield* sender,
     55                                const string16& new_contents) {}
     56   virtual bool HandleKeyEvent(views::Textfield* sender,
     57                               const views::KeyEvent& key_event);
     58 
     59   // ImageDownloader::Delegate:
     60   virtual void OnImageDecoded(const ImageDecoder* decoder,
     61                               const SkBitmap& decoded_image);
     62 
     63   // views::ButtonListener:
     64   virtual void ButtonPressed(views::Button* sender, const views::Event& event);
     65 
     66   // Initializes UI.
     67   void Init();
     68 
     69   void set_delegate(Delegate* delegate) {
     70     delegate_ = delegate;
     71   }
     72 
     73   // Instructs to download and display another captcha image.
     74   // Is used when same CaptchaView is reused.
     75   void SetCaptchaURL(const GURL& captcha_url);
     76 
     77  protected:
     78   // views::View:
     79   virtual gfx::Size GetPreferredSize();
     80   virtual void ViewHierarchyChanged(bool is_add,
     81                                     views::View* parent,
     82                                     views::View* child);
     83 
     84  private:
     85   Delegate* delegate_;
     86   GURL captcha_url_;
     87   views::ImageView* captcha_image_;
     88   views::Textfield* captcha_textfield_;
     89 
     90   // True when view is not hosted inside dialog,
     91   // thus should draw OK button/background.
     92   bool is_standalone_;
     93 
     94   // Used in standalone mode.
     95   views::TextButton* ok_button_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(CaptchaView);
     98 };
     99 
    100 }  // namespace chromeos
    101 
    102 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_
    103