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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_COCOA_RWHVM_EDITCOMMAND_HELPER_H_
#define CHROME_BROWSER_COCOA_RWHVM_EDITCOMMAND_HELPER_H_
#import <Cocoa/Cocoa.h>
#include "base/hash_tables.h"
#include "base/logging.h"
#include "chrome/browser/renderer_host/render_widget_host_view_mac.h"
#include "testing/gtest/include/gtest/gtest_prod.h"
// RenderWidgetHostViewMacEditCommandHelper is the real name of this class
// but that's too long, so we use a shorter version.
//
// This class mimics the behavior of WebKit's WebView class in a way that makes
// sense for Chrome.
//
// WebCore has the concept of "core commands", basically named actions such as
// "Select All" and "Move Cursor Left". The commands are executed using their
// string value by WebCore.
//
// This class is responsible for 2 things:
// 1. Provide an abstraction to determine the enabled/disabled state of menu
// items that correspond to edit commands.
// 2. Hook up a bunch of objc selectors to the RenderWidgetHostViewCocoa object.
// (note that this is not a misspelling of RenderWidgetHostViewMac, it's in
// fact a distinct object) When these selectors are called, the relevant
// edit command is executed in WebCore.
class RWHVMEditCommandHelper {
FRIEND_TEST(RWHVMEditCommandHelperTest, TestAddEditingSelectorsToClass);
FRIEND_TEST(RWHVMEditCommandHelperTest, TestEditingCommandDelivery);
public:
RWHVMEditCommandHelper();
// Adds editing selectors to the objc class using the objc runtime APIs.
// Each selector is connected to a single c method which forwards the message
// to WebCore's ExecuteEditCommand() function.
// This method is idempotent.
// The class passed in must conform to the RenderWidgetHostViewMacOwner
// protocol.
void AddEditingSelectorsToClass(Class klass);
// Is a given menu item currently enabled?
// SEL - the objc selector currently associated with an NSMenuItem.
// owner - An object we can retrieve a RenderWidgetHostViewMac from to
// determine the command states.
bool IsMenuItemEnabled(SEL item_action,
id<RenderWidgetHostViewMacOwner> owner);
// Converts an editing selector into a command name that can be sent to
// webkit.
static NSString* CommandNameForSelector(SEL selector);
protected:
// Gets a list of all the selectors that AddEditingSelectorsToClass adds to
// the aforementioned class.
// returns an array of NSStrings WITHOUT the trailing ':'s.
NSArray* GetEditSelectorNames();
private:
base::hash_set<std::string> edit_command_set_;
DISALLOW_COPY_AND_ASSIGN(RWHVMEditCommandHelper);
};
#endif // CHROME_BROWSER_COCOA_RWHVM_EDITCOMMAND_HELPER_H_
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