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| 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_PROTECTOR_BASE_SETTING_CHANGE_H_ | |
| 6 #define CHROME_BROWSER_PROTECTOR_BASE_SETTING_CHANGE_H_ | |
| 7 | |
| 8 #include <utility> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/string16.h" | |
| 12 #include "chrome/browser/ui/startup/startup_tab.h" | |
| 13 #include "googleurl/src/gurl.h" | |
| 14 | |
| 15 class Browser; | |
| 16 class Profile; | |
| 17 class TemplateURL; | |
| 18 struct SessionStartupPref; | |
| 19 | |
| 20 namespace protector { | |
| 21 | |
| 22 class CompositeSettingsChange; | |
| 23 | |
| 24 // Base class for setting change tracked by Protector. | |
| 25 class BaseSettingChange { | |
| 26 public: | |
| 27 // Pair consisting of a display name representing either new or backup setting | |
| 28 // and priority for it. Priority is used for composite changes, consisting | |
| 29 // of multiple BaseSettingChange instances - the display name with the highest | |
| 30 // priority is used. | |
| 31 typedef std::pair<size_t, string16> DisplayName; | |
| 32 | |
| 33 // Default priority value. | |
| 34 static const size_t kDefaultNamePriority; | |
| 35 | |
| 36 BaseSettingChange(); | |
| 37 virtual ~BaseSettingChange(); | |
| 38 | |
| 39 // Merges |this| with |other| and returns a CompositeSettingsChange instance. | |
| 40 // Returned instance takes ownership of |other|. | |
| 41 // Init should not be called for the returned instance. | |
| 42 // |this| may be another CompositeSettingsChange, in which case |other| is | |
| 43 // simply added to it and |this| is returned. |other| cannot be | |
| 44 // CompositeSettingsChange. | |
| 45 virtual CompositeSettingsChange* MergeWith(BaseSettingChange* other); | |
| 46 | |
| 47 // Returns true if |this| is a result of merging some changes with |other|. | |
| 48 virtual bool Contains(const BaseSettingChange* other) const; | |
| 49 | |
| 50 // Applies initial actions to the setting if needed. Must be called before | |
| 51 // any other calls are made, including text getters. | |
| 52 // Returns true if initialization was successful. | |
| 53 // Associates this change with |profile| instance so overrides must call the | |
| 54 // base method. | |
| 55 virtual bool Init(Profile* profile); | |
| 56 | |
| 57 // Called instead of Init when ProtectorService is disabled. No other members | |
| 58 // are called in that case. | |
| 59 virtual void InitWhenDisabled(Profile* profile); | |
| 60 | |
| 61 // Persists new setting if needed. |browser| is the Browser instance from | |
| 62 // which the user action originates. | |
| 63 virtual void Apply(Browser* browser); | |
| 64 | |
| 65 // Restores old setting if needed. |browser| is the Browser instance from | |
| 66 // which the user action originates. | |
| 67 virtual void Discard(Browser* browser); | |
| 68 | |
| 69 // Indicates that user has ignored this change and timeout has passed. | |
| 70 virtual void Timeout(); | |
| 71 | |
| 72 // Returns the resource ID of the badge icon. | |
| 73 virtual int GetBadgeIconID() const = 0; | |
| 74 | |
| 75 // Returns the resource ID for the menu item icon. | |
| 76 virtual int GetMenuItemIconID() const = 0; | |
| 77 | |
| 78 // Returns the resource ID for bubble view icon. | |
| 79 virtual int GetBubbleIconID() const = 0; | |
| 80 | |
| 81 // Returns the wrench menu item and bubble title. | |
| 82 virtual string16 GetBubbleTitle() const = 0; | |
| 83 | |
| 84 // Returns the bubble message text. | |
| 85 virtual string16 GetBubbleMessage() const = 0; | |
| 86 | |
| 87 // Returns text for the button to apply the change with |Apply|. | |
| 88 // Returns empty string if no apply button should be shown. | |
| 89 virtual string16 GetApplyButtonText() const = 0; | |
| 90 | |
| 91 // Returns text for the button to discard the change with |Discard|. | |
| 92 virtual string16 GetDiscardButtonText() const = 0; | |
| 93 | |
| 94 // Returns the display name and priority for the new setting. If multiple | |
| 95 // BaseSettingChange instances are merged into CompositeSettingsChange | |
| 96 // instance, the display name with the highest priority will be used for the | |
| 97 // Apply button (Discard button will have a generic caption in that case). | |
| 98 // Returns an empty string in |second| if there is no specific representation | |
| 99 // for new setting value and a generic string should be used. | |
| 100 virtual DisplayName GetApplyDisplayName() const; | |
| 101 | |
| 102 // Returns a URL uniquely identifying new (to be applied) settings. | |
| 103 // ProtectorService uses this URLs to decide whether to merge a change | |
| 104 // with already existing active changes. The URL may be empty. | |
| 105 virtual GURL GetNewSettingURL() const; | |
| 106 | |
| 107 // Returns true if this change can be merged with other changes. | |
| 108 virtual bool CanBeMerged() const; | |
| 109 | |
| 110 // Returns |false| if this change is not user-visible. It won't be presented | |
| 111 // to user on it's own then, but may be merged with other changes and applied | |
| 112 // or discarded. | |
| 113 virtual bool IsUserVisible() const; | |
| 114 | |
| 115 protected: | |
| 116 // Profile instance we've been associated with by an |Init| call. | |
| 117 Profile* profile() { return profile_; } | |
| 118 | |
| 119 private: | |
| 120 Profile* profile_; | |
| 121 | |
| 122 DISALLOW_COPY_AND_ASSIGN(BaseSettingChange); | |
| 123 }; | |
| 124 | |
| 125 // Display name priorities of various change types: | |
| 126 extern const size_t kDefaultSearchProviderChangeNamePriority; | |
| 127 extern const size_t kSessionStartupChangeNamePriority; | |
| 128 extern const size_t kHomepageChangeNamePriority; | |
| 129 | |
| 130 // TODO(ivankr): CompositeSettingChange that incapsulates multiple | |
| 131 // BaseSettingChange instances. | |
| 132 | |
| 133 // Allocates and initializes BaseSettingChange implementation for default search | |
| 134 // provider setting. Reports corresponding histograms. Both |actual| and | |
| 135 // |backup| may be NULL if corresponding values are unknown or invalid. | |
| 136 // |backup| will be owned by the returned |BaseSettingChange| instance. |actual| | |
| 137 // is not owned and is safe to destroy after Protector::ShowChange has been | |
| 138 // called for the returned instance. | |
| 139 BaseSettingChange* CreateDefaultSearchProviderChange(TemplateURL* actual, | |
| 140 TemplateURL* backup); | |
| 141 | |
| 142 // Allocates and initializes BaseSettingChange implementation for session | |
| 143 // startup setting, including the pinned tabs. Reports corresponding histograms. | |
| 144 BaseSettingChange* CreateSessionStartupChange( | |
| 145 const SessionStartupPref& actual_startup_pref, | |
| 146 const StartupTabs& actual_pinned_tabs, | |
| 147 const SessionStartupPref& backup_startup_pref, | |
| 148 const StartupTabs& backup_pinned_tabs); | |
| 149 | |
| 150 BaseSettingChange* CreateHomepageChange( | |
| 151 const std::string& actual_homepage, | |
| 152 bool actual_homepage_is_ntp, | |
| 153 bool actual_show_homepage, | |
| 154 const std::string& backup_homepage, | |
| 155 bool backup_homepage_is_ntp, | |
| 156 bool backup_show_homepage); | |
| 157 | |
| 158 // Allocates and initializes BaseSettingChange implementation for an unknown | |
| 159 // preferences change with invalid backup. | |
| 160 BaseSettingChange* CreatePrefsBackupInvalidChange(); | |
| 161 | |
| 162 } // namespace protector | |
| 163 | |
| 164 #endif // CHROME_BROWSER_PROTECTOR_BASE_SETTING_CHANGE_H_ | |
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