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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ | 5 #ifndef CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ |
| 6 #define CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ | 6 #define CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ |
| 7 | 7 |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/gtest_prod_util.h" | 10 #include "base/gtest_prod_util.h" |
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| 93 | 93 |
| 94 // Call a Javascript function by sending its name and arguments down to | 94 // Call a Javascript function by sending its name and arguments down to |
| 95 // the renderer. This is asynchronous; there's no way to get the result | 95 // the renderer. This is asynchronous; there's no way to get the result |
| 96 // of the call, and should be thought of more like sending a message to | 96 // of the call, and should be thought of more like sending a message to |
| 97 // the page. | 97 // the page. |
| 98 // All function names in WebUI must consist of only ASCII characters. | 98 // All function names in WebUI must consist of only ASCII characters. |
| 99 // These functions will crash if JavaScript is not currently allowed. | 99 // These functions will crash if JavaScript is not currently allowed. |
| 100 template <typename... Values> | 100 template <typename... Values> |
| 101 void CallJavascriptFunction(const std::string& function_name, | 101 void CallJavascriptFunction(const std::string& function_name, |
| 102 const Values&... values) { | 102 const Values&... values) { |
| 103 CHECK(IsJavascriptAllowed()) << "Cannot CallJavascriptFunction before " | 103 // Cannot CallJavascriptFunction before explicitly allowing JavaScript. |
| 104 "explicitly allowing JavaScript."; | 104 CHECK(IsJavascriptAllowed()); |
| 105 | 105 |
| 106 // The CHECK above makes this call safe. | 106 // The CHECK above makes this call safe. |
| 107 web_ui()->CallJavascriptFunctionUnsafe(function_name, values...); | 107 web_ui()->CallJavascriptFunctionUnsafe(function_name, values...); |
| 108 } | 108 } |
| 109 | 109 |
| 110 // Returns the attached WebUI for this handler. | 110 // Returns the attached WebUI for this handler. |
| 111 WebUI* web_ui() const { return web_ui_; } | 111 WebUI* web_ui() const { return web_ui_; } |
| 112 | 112 |
| 113 // Sets the attached WebUI - exposed to subclasses for testing purposes. | 113 // Sets the attached WebUI - exposed to subclasses for testing purposes. |
| 114 void set_web_ui(WebUI* web_ui) { web_ui_ = web_ui; } | 114 void set_web_ui(WebUI* web_ui) { web_ui_ = web_ui; } |
| 115 | 115 |
| 116 private: | 116 private: |
| 117 // Provide external classes access to web_ui(), set_web_ui(), and | 117 // Provide external classes access to web_ui(), set_web_ui(), and |
| 118 // RenderViewReused. | 118 // RenderViewReused. |
| 119 friend class WebUIImpl; | 119 friend class WebUIImpl; |
| 120 friend class ::WebUIBrowserTest; | 120 friend class ::WebUIBrowserTest; |
| 121 | 121 |
| 122 // TODO(dbeam): disallow JavaScript when a renderer process crashes. | 122 // TODO(dbeam): disallow JavaScript when a renderer process crashes. |
| 123 // http://crbug.com/610450 | 123 // http://crbug.com/610450 |
| 124 | 124 |
| 125 // True if the page is for JavaScript calls from this handler. | 125 // True if the page is for JavaScript calls from this handler. |
| 126 bool javascript_allowed_; | 126 bool javascript_allowed_; |
| 127 | 127 |
| 128 WebUI* web_ui_; | 128 WebUI* web_ui_; |
| 129 }; | 129 }; |
| 130 | 130 |
| 131 } // namespace content | 131 } // namespace content |
| 132 | 132 |
| 133 #endif // CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ | 133 #endif // CONTENT_PUBLIC_BROWSER_WEB_UI_MESSAGE_HANDLER_H_ |
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