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// Copyright (c) 2006-2009 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_EXTENSIONS_EXTENSION_HOST_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
#include <string>
#include "base/scoped_ptr.h"
#include "chrome/browser/extensions/extension_function_dispatcher.h"
#include "chrome/browser/renderer_host/render_view_host_delegate.h"
#include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
#if defined(TOOLKIT_VIEWS)
#include "chrome/browser/views/extensions/extension_view.h"
#elif defined(OS_LINUX)
#include "chrome/browser/gtk/extension_view_gtk.h"
#endif
class Browser;
class Extension;
class ExtensionProcessManager;
class RenderProcessHost;
class RenderWidgetHost;
class RenderWidgetHostView;
class TabContents;
struct WebPreferences;
// This class is the browser component of an extension component's RenderView.
// It handles setting up the renderer process, if needed, with special
// privileges available to extensions. It may have a view to be shown in the
// in the browser UI, or it may be hidden.
class ExtensionHost : public RenderViewHostDelegate,
public RenderViewHostDelegate::View,
public ExtensionFunctionDispatcher::Delegate {
public:
// Enable DOM automation in created render view hosts.
static void EnableDOMAutomation() { enable_dom_automation_ = true; }
ExtensionHost(Extension* extension, SiteInstance* site_instance,
const GURL& url);
~ExtensionHost();
#if defined(TOOLKIT_VIEWS)
void set_view(ExtensionView* view) { view_.reset(view); }
ExtensionView* view() const { return view_.get(); }
#elif defined(OS_LINUX)
ExtensionViewGtk* view() const { return view_.get(); }
#endif
// Create an ExtensionView and tie it to this host and |browser|.
void CreateView(Browser* browser);
Extension* extension() { return extension_; }
RenderViewHost* render_view_host() const { return render_view_host_; }
RenderProcessHost* render_process_host() const;
SiteInstance* site_instance() const;
bool did_stop_loading() const { return did_stop_loading_; }
// Returns true if the render view is initialized and didn't crash.
bool IsRenderViewLive() const;
// Initializes our RenderViewHost by creating its RenderView and navigating
// to this host's url. Uses host_view for the RenderViewHost's view (can be
// NULL).
void CreateRenderView(RenderWidgetHostView* host_view);
// Sets |url_| and navigates |render_view_host_|.
void NavigateToURL(const GURL& url);
// Restarts extension's renderer process. Can be called only if the renderer
// process crashed.
void RecoverCrashedExtension();
// RenderViewHostDelegate implementation.
virtual RenderViewHostDelegate::View* GetViewDelegate();
virtual const GURL& GetURL() const { return url_; }
virtual void RenderViewCreated(RenderViewHost* render_view_host);
virtual void RenderViewGone(RenderViewHost* render_view_host);
virtual void DidNavigate(RenderViewHost* render_view_host,
const ViewHostMsg_FrameNavigate_Params& params);
virtual void DidStopLoading(RenderViewHost* render_view_host);
virtual WebPreferences GetWebkitPrefs();
virtual void ProcessDOMUIMessage(const std::string& message,
const std::string& content,
int request_id,
bool has_callback);
virtual void RunJavaScriptMessage(const std::wstring& message,
const std::wstring& default_prompt,
const GURL& frame_url,
const int flags,
IPC::Message* reply_msg,
bool* did_suppress_message);
virtual void DidInsertCSS();
// RenderViewHostDelegate::View
virtual void CreateNewWindow(int route_id,
base::WaitableEvent* modal_dialog_event);
virtual void CreateNewWidget(int route_id, bool activatable);
virtual void ShowCreatedWindow(int route_id,
WindowOpenDisposition disposition,
const gfx::Rect& initial_pos,
bool user_gesture,
const GURL& creator_url);
virtual void ShowCreatedWidget(int route_id,
const gfx::Rect& initial_pos);
virtual void ShowContextMenu(const ContextMenuParams& params);
virtual void StartDragging(const WebDropData& drop_data);
virtual void UpdateDragCursor(bool is_drop_target);
virtual void GotFocus();
virtual void TakeFocus(bool reverse);
virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
virtual void HandleMouseEvent();
virtual void HandleMouseLeave();
virtual void UpdatePreferredWidth(int pref_width);
private:
// Whether to allow DOM automation for created RenderViewHosts. This is used
// for testing.
static bool enable_dom_automation_;
// ExtensionFunctionDispatcher::Delegate
// If this ExtensionHost has a view, this returns the Browser that view is a
// part of. If this is a global background page, we use the active Browser
// instead.
virtual Browser* GetBrowser();
virtual ExtensionHost* GetExtensionHost() { return this; }
// The extension that we're hosting in this view.
Extension* extension_;
// The profile that this host is tied to.
Profile* profile_;
// Optional view that shows the rendered content in the UI.
#if defined(TOOLKIT_VIEWS)
scoped_ptr<ExtensionView> view_;
#elif defined(OS_LINUX)
scoped_ptr<ExtensionViewGtk> view_;
#endif
// The host for our HTML content.
RenderViewHost* render_view_host_;
// Common implementations of some RenderViewHostDelegate::View methods.
RenderViewHostDelegateViewHelper delegate_view_helper_;
// Whether the RenderWidget has reported that it has stopped loading.
bool did_stop_loading_;
// The URL being hosted.
GURL url_;
scoped_ptr<ExtensionFunctionDispatcher> extension_function_dispatcher_;
DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
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