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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_EDITCOMMAND_HELPER_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_EDITCOMMAND_HELPER_H_ 7 8 #import <Cocoa/Cocoa.h> 9 10 #include "base/basictypes.h" 11 #include "base/containers/hash_tables.h" 12 #include "base/gtest_prod_util.h" 13 #include "content/browser/renderer_host/render_widget_host_view_mac.h" 14 15 namespace content { 16 17 // This class mimics the behavior of WebKit's WebView class in a way that makes 18 // sense for Chrome. 19 // 20 // WebCore has the concept of "core commands", basically named actions such as 21 // "Select All" and "Move Cursor Left". The commands are executed using their 22 // string value by WebCore. 23 // 24 // This class is responsible for 2 things: 25 // 1. Provide an abstraction to determine the enabled/disabled state of menu 26 // items that correspond to edit commands. 27 // 2. Hook up a bunch of objc selectors to the RenderWidgetHostViewCocoa object. 28 // (note that this is not a misspelling of RenderWidgetHostViewMac, it's in 29 // fact a distinct object) When these selectors are called, the relevant 30 // edit command is executed in WebCore. 31 class CONTENT_EXPORT RenderWidgetHostViewMacEditCommandHelper { 32 FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewMacEditCommandHelperTest, 33 TestAddEditingSelectorsToClass); 34 FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewMacEditCommandHelperTest, 35 TestEditingCommandDelivery); 36 37 public: 38 RenderWidgetHostViewMacEditCommandHelper(); 39 ~RenderWidgetHostViewMacEditCommandHelper(); 40 41 // Adds editing selectors to the objc class using the objc runtime APIs. 42 // Each selector is connected to a single c method which forwards the message 43 // to WebCore's ExecuteEditCommand() function. 44 // This method is idempotent. 45 // The class passed in must conform to the RenderWidgetHostViewMacOwner 46 // protocol. 47 void AddEditingSelectorsToClass(Class klass); 48 49 // Is a given menu item currently enabled? 50 // SEL - the objc selector currently associated with an NSMenuItem. 51 // owner - An object we can retrieve a RenderWidgetHostViewMac from to 52 // determine the command states. 53 bool IsMenuItemEnabled(SEL item_action, 54 id<RenderWidgetHostViewMacOwner> owner); 55 56 // Converts an editing selector into a command name that can be sent to 57 // webkit. 58 static NSString* CommandNameForSelector(SEL selector); 59 60 protected: 61 // Gets a list of all the selectors that AddEditingSelectorsToClass adds to 62 // the aforementioned class. 63 // returns an array of NSStrings WITHOUT the trailing ':'s. 64 NSArray* GetEditSelectorNames(); 65 66 private: 67 base::hash_set<std::string> edit_command_set_; 68 DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMacEditCommandHelper); 69 }; 70 71 } // namespace content 72 73 #endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_EDITCOMMAND_HELPER_H_ 74