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| 1 // Copyright 2015 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_WUG_WEB_UI_VIEW_H_ | |
| 6 #define CHROME_BROWSER_UI_WEBUI_WUG_WEB_UI_VIEW_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/bind.h" | |
| 11 #include "base/containers/hash_tables.h" | |
| 12 #include "base/macros.h" | |
| 13 #include "base/memory/ref_counted_memory.h" | |
| 14 #include "base/memory/scoped_ptr.h" | |
| 15 #include "components/login/base_screen_handler_utils.h" | |
| 16 #include "components/login/screens/screen_context.h" | |
| 17 #include "components/webui_generator/export.h" | |
| 18 #include "components/webui_generator/view.h" | |
| 19 #include "content/public/browser/web_ui.h" | |
| 20 #include "content/public/browser/web_ui_data_source.h" | |
| 21 | |
| 22 namespace base { | |
| 23 class DictionaryValue; | |
| 24 } | |
| 25 | |
| 26 namespace content { | |
| 27 class WebUI; | |
| 28 } | |
| 29 | |
| 30 namespace login { | |
| 31 class LocalizedValuesBuilder; | |
| 32 } | |
| 33 | |
| 34 namespace webui_generator { | |
| 35 | |
| 36 using Context = login::ScreenContext; | |
| 37 | |
| 38 /** | |
| 39 * View implementation for the WebUI. Represents a single HTML element derieved | |
| 40 * from <web-ui-view>. | |
| 41 */ | |
| 42 class WUG_EXPORT WebUIView : public View { | |
| 43 public: | |
| 44 WebUIView(content::WebUI* web_ui, const std::string& id); | |
| 45 ~WebUIView() override; | |
| 46 | |
| 47 // Should be called for |data_source|, where this views will be used. | |
| 48 // Sets up |data_source| for children of |this| as well, that is why this | |
| 49 // method only shouldn't be called for non-root views. | |
| 50 void SetUpDataSource(content::WebUIDataSource* data_source); | |
| 51 | |
| 52 // Overridden from View: | |
| 53 void Init() override; | |
| 54 | |
| 55 protected: | |
| 56 using ResourcesMap = | |
| 57 base::hash_map<std::string, scoped_refptr<base::RefCountedMemory>>; | |
| 58 | |
| 59 content::WebUI* web_ui() { return web_ui_; } | |
| 60 | |
| 61 template <typename T, typename... Args> | |
| 62 void AddCallback(const std::string& name, void (T::*method)(Args...)) { | |
| 63 base::Callback<void(Args...)> callback = | |
| 64 base::Bind(method, base::Unretained(static_cast<T*>(this))); | |
| 65 web_ui_->RegisterMessageCallback( | |
| 66 name, base::Bind(&::login::CallbackWrapper<Args...>, callback)); | |
| 67 } | |
| 68 | |
| 69 // Overridden from View: | |
| 70 void OnReady() override; | |
| 71 void OnContextChanged(const base::DictionaryValue& diff) override; | |
| 72 | |
| 73 virtual void AddLocalizedValues(::login::LocalizedValuesBuilder* builder) = 0; | |
| 74 virtual void AddResources(ResourcesMap* resources_map) = 0; | |
| 75 | |
| 76 private: | |
| 77 // Internal implementation of SetUpDataSource. | |
| 78 void SetUpDataSourceInternal(content::WebUIDataSource* data_source, | |
| 79 ResourcesMap* resources_map); | |
| 80 | |
| 81 // Called when corresponding <web-ui-view> is ready. | |
| 82 void HandleHTMLReady(); | |
| 83 | |
| 84 // Called when context is changed on JS side. | |
| 85 void HandleContextChanged(const base::DictionaryValue* diff); | |
| 86 | |
| 87 // Called when both |this| and corresponding <web-ui-view> are ready. | |
| 88 void Bind(); | |
| 89 | |
| 90 // Request filter for data source. Filter is needed to answer with a generated | |
| 91 // HTML and JS code which is not kept in resources. | |
| 92 bool HandleDataRequest( | |
| 93 const ResourcesMap* resources, | |
| 94 const std::string& path, | |
| 95 const content::WebUIDataSource::GotDataCallback& got_data_callback); | |
| 96 | |
| 97 private: | |
| 98 content::WebUI* web_ui_; | |
| 99 bool html_ready_; | |
| 100 bool view_bound_; | |
| 101 scoped_ptr<Context> pending_context_changes_; | |
| 102 | |
| 103 DISALLOW_COPY_AND_ASSIGN(WebUIView); | |
| 104 }; | |
| 105 | |
| 106 } // namespace webui_generator | |
| 107 | |
| 108 #endif // CHROME_BROWSER_UI_WEBUI_WUG_WEB_UI_VIEW_H_ | |
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