chrome/browser/translate/translate_ui_delegate.h

   1 // Copyright 2013 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_TRANSLATE_TRANSLATE_UI_DELEGATE_H_
   6 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_UI_DELEGATE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/logging.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/strings/string16.h"
  14 #include "chrome/common/chrome_constants.h"
  15 #include "components/translate/core/common/translate_errors.h"
  16
  17 class TranslatePrefs;
  18
  19 namespace content {
  20 class WebContents;
  21 }  // namespace content
  22
  23 // The TranslateUIDelegate is a generic delegate for UI which offers Translate
  24 // feature to the user.
  25 class TranslateUIDelegate {
  26  public:
  27   enum {
  28     NO_INDEX = -1,
  29   };
  30
  31   TranslateUIDelegate(content::WebContents* web_contents,
  32                       const std::string& original_language,
  33                       const std::string& target_language);
  34   virtual ~TranslateUIDelegate();
  35
  36   content::WebContents* web_contents() { return web_contents_; }
  37
  38   // Handles when an error message is shown.
  39   void OnErrorShown(TranslateErrors::Type error_type);
  40
  41   // Returns the number of languages supported.
  42   size_t GetNumberOfLanguages() const;
  43
  44   // Returns the original language index.
  45   size_t GetOriginalLanguageIndex() const;
  46
  47   // Updates the original language index.
  48   void UpdateOriginalLanguageIndex(size_t language_index);
  49
  50   // Returns the target language index.
  51   size_t GetTargetLanguageIndex() const;
  52
  53   // Updates the target language index.
  54   void UpdateTargetLanguageIndex(size_t language_index);
  55
  56   // Returns the ISO code for the language at |index|.
  57   std::string GetLanguageCodeAt(size_t index) const;
  58
  59   // Returns the displayable name for the language at |index|.
  60   base::string16 GetLanguageNameAt(size_t index) const;
  61
  62   // The original language for Translate.
  63   std::string GetOriginalLanguageCode() const;
  64
  65   // The target language for Translate.
  66   std::string GetTargetLanguageCode() const;
  67
  68   // Starts translating the current page.
  69   void Translate();
  70
  71   // Reverts translation.
  72   void RevertTranslation();
  73
  74   // Processes when the user declines translation.
  75   void TranslationDeclined(bool explicitly_closed);
  76
  77   // Returns true if the current language is blocked.
  78   bool IsLanguageBlocked();
  79
  80   // Sets the value if the current language is blocked.
  81   void SetLanguageBlocked(bool value);
  82
  83   // Returns true if the current webpage is blacklisted.
  84   bool IsSiteBlacklisted();
  85
  86   // Sets the value if the current webpage is blacklisted.
  87   void SetSiteBlacklist(bool value);
  88
  89   // Returns true if the webpage in the current original language should be
  90   // translated into the current target language automatically.
  91   bool ShouldAlwaysTranslate();
  92
  93   // Sets the value if the webpage in the current original language should be
  94   // translated into the current target language automatically.
  95   void SetAlwaysTranslate(bool value);
  96
  97  private:
  98   // Gets the host of the page being translated, or an empty string if no URL is
  99   // associated with the current page.
 100   std::string GetPageHost();
 101
 102   content::WebContents* web_contents_;
 103
 104   typedef std::pair<std::string, base::string16> LanguageNamePair;
 105
 106   // The list supported languages for translation.
 107   // The pair first string is the language ISO code (ex: en, fr...), the second
 108   // string is the displayable name on the current locale.
 109   // The languages are sorted alphabetically based on the displayable name.
 110   std::vector<LanguageNamePair> languages_;
 111
 112   // The index for language the page is originally in.
 113   size_t original_language_index_;
 114
 115   // The index for language the page is originally in that was originally
 116   // reported (original_language_index_ changes if the user selects a new
 117   // original language, but this one does not).  This is necessary to report
 118   // language detection errors with the right original language even if the user
 119   // changed the original language.
 120   size_t initial_original_language_index_;
 121
 122   // The index for language the page should be translated to.
 123   size_t target_language_index_;
 124
 125   // The translation related preferences.
 126   scoped_ptr<TranslatePrefs> prefs_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(TranslateUIDelegate);
 129 };
 130
 131 #endif  // CHROME_BROWSER_TRANSLATE_TRANSLATE_UI_DELEGATE_H_