cef/libcef/webwidget_host.h

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// Copyright (c) 2006-2008 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 _WEBWIDGET_HOST_H
#define _WEBWIDGET_HOST_H
#include "include/internal/cef_string.h"
#include "include/internal/cef_types.h"
#include "base/basictypes.h"
#include "base/scoped_ptr.h"
#include "base/task.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebRect.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebTextInputType.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/rect.h"
#include "webkit/plugins/npapi/webplugin.h"
#include <map>
#if defined(OS_WIN)
#include "ui/base/win/ime_input.h"
#endif
namespace gfx {
class Rect;
class Size;
}
namespace WebKit {
class WebWidget;
class WebWidgetClient;
class WebKeyboardEvent;
struct WebScreenInfo;
}
#if defined(OS_MACOSX)
#ifdef __OBJC__
@class NSEvent;
#else
class NSEvent;
#endif
#endif
// This class is a simple NativeView-based host for a WebWidget
class WebWidgetHost {
public:
class PaintDelegate {
public:
virtual void Paint(bool popup, const gfx::Rect& dirtyRect,
const void* buffer) =0;
};
// The new instance is deleted once the associated NativeView is destroyed.
// The newly created window should be resized after it is created, using the
// MoveWindow (or equivalent) function.
static WebWidgetHost* Create(gfx::NativeView parent_view,
WebKit::WebWidgetClient* client,
PaintDelegate* paint_delegate);
virtual ~WebWidgetHost();
#if defined(OS_MACOSX)
static void HandleEvent(gfx::NativeView view, NSEvent* event);
#endif
gfx::NativeView view_handle() const { return view_; }
WebKit::WebWidget* webwidget() const { return webwidget_; }
void DidInvalidateRect(const gfx::Rect& rect);
void DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect);
void ScheduleComposite();
void ScheduleAnimation();
#if defined(OS_WIN)
void SetCursor(HCURSOR cursor);
#endif
void DiscardBackingStore();
// Allow clients to update the paint rect. For example, if we get a gdk
// expose or WM_PAINT event, we need to update the paint rect.
void UpdatePaintRect(const gfx::Rect& rect);
void Paint();
void InvalidateRect(const gfx::Rect& rect);
bool GetImage(int width, int height, void* buffer);
void SetSize(int width, int height);
void GetSize(int& width, int& height);
skia::PlatformCanvas* canvas() const { return canvas_.get(); }
WebKit::WebScreenInfo GetScreenInfo();
WebKit::WebKeyboardEvent GetLastKeyEvent() const { return last_key_event_; }
void PaintRect(const gfx::Rect& rect);
void SetTooltipText(const CefString& tooltip_text);
void SendKeyEvent(cef_key_type_t type, int key, int modifiers, bool sysChar,
bool imeChar);
void SendMouseClickEvent(int x, int y, cef_mouse_button_type_t type,
bool mouseUp, int clickCount);
void SendMouseMoveEvent(int x, int y, bool mouseLeave);
void SendMouseWheelEvent(int x, int y, int delta);
void SendFocusEvent(bool setFocus);
void SendCaptureLostEvent();
// Manage windowed plugins when window rendering is disabled.
bool HasWindowedPlugins() { return !plugin_map_.empty(); }
void AddWindowedPlugin(gfx::PluginWindowHandle handle);
void RemoveWindowedPlugin(gfx::PluginWindowHandle handle);
void MoveWindowedPlugin(const webkit::npapi::WebPluginGeometry& geometry);
gfx::PluginWindowHandle GetWindowedPluginAt(int x, int y);
// If window rendering is disabled paint messages are generated after all
// other pending messages have been processed.
void DoPaint();
void set_popup(bool popup) { popup_ = popup; }
bool popup() { return popup_; }
PaintDelegate* paint_delegate() { return paint_delegate_; }
protected:
WebWidgetHost();
#if defined(OS_WIN)
// Per-class wndproc. Returns true if the event should be swallowed.
virtual bool WndProc(UINT message, WPARAM wparam, LPARAM lparam);
void Resize(LPARAM lparam);
virtual void MouseEvent(UINT message, WPARAM wparam, LPARAM lparam);
void WheelEvent(WPARAM wparam, LPARAM lparam);
void KeyEvent(UINT message, WPARAM wparam, LPARAM lparam);
void CaptureLostEvent();
void SetFocus(bool enable);
void OnNotify(WPARAM wparam, NMHDR* header);
static LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT OnImeSetContext(UINT message, WPARAM wparam, LPARAM lparam, BOOL& handled);
LRESULT OnImeStartComposition(UINT message, WPARAM wparam, LPARAM lparam, BOOL& handled);
LRESULT OnImeComposition(UINT message, WPARAM wparam, LPARAM lparam, BOOL& handled);
LRESULT OnImeEndComposition(UINT message, WPARAM wparam, LPARAM lparam, BOOL& handled);
void OnInputLangChange(DWORD character_set, HKL input_language_id);
void ImeUpdateTextInputState(WebKit::WebTextInputType type, const gfx::Rect& caret_rect);
static void UpdateInputMethod(HWND view);
#elif defined(OS_MACOSX)
// These need to be called from a non-subclass, so they need to be public.
public:
void Resize(const gfx::Rect& rect);
void MouseEvent(NSEvent *);
void WheelEvent(NSEvent *);
void KeyEvent(NSEvent *);
void SetFocus(bool enable);
protected:
#elif defined(TOOLKIT_USES_GTK)
public:
// ---------------------------------------------------------------------------
// This is needed on Linux because the GtkWidget creation is the same between
// both web view hosts and web widget hosts. The Windows code manages this by
// reusing the WndProc function (static, above). However, GTK doesn't use a
// single big callback function like that so we have a static function that
// sets up a GtkWidget correctly.
// parent: a GtkBox to pack the new widget at the end of
// host: a pointer to a WebWidgetHost (or subclass thereof)
// ---------------------------------------------------------------------------
static gfx::NativeView CreateWidget(gfx::NativeView parent_view,
WebWidgetHost* host);
void WindowDestroyed();
void Resize(const gfx::Size& size);
#endif
#if defined(OS_WIN)
void TrackMouseLeave(bool enable);
#endif
void ResetScrollRect();
void set_painting(bool value) {
#ifndef NDEBUG
painting_ = value;
#endif
}
void EnsureTooltip();
void ResetTooltip();
gfx::NativeView view_;
// The paint delegate is used instead of the view when window rendering is
// disabled.
PaintDelegate* paint_delegate_;
WebKit::WebWidget* webwidget_;
scoped_ptr<skia::PlatformCanvas> canvas_;
// True if this widget is a popup widget.
bool popup_;
// Specifies the portion of the webwidget that needs painting.
gfx::Rect paint_rect_;
// Specifies the portion of the webwidget that needs scrolling.
gfx::Rect scroll_rect_;
int scroll_dx_;
int scroll_dy_;
// Specifies the portion of the webwidget that has been invalidated when
// window rendering is disabled.
gfx::Rect update_rect_;
CancelableTask* update_task_;
// The map of windowed plugins that need to be drawn when window rendering is
// disabled.
typedef std::map<gfx::PluginWindowHandle,webkit::npapi::WebPluginGeometry>
PluginMap;
PluginMap plugin_map_;
#if defined(OS_WIN)
bool track_mouse_leave_;
std::wstring tooltip_text_;
gfx::NativeView tooltip_view_;
bool tooltip_showing_;
// Wrapper class for IME input.
ui::ImeInput ime_input_;
// Represents whether or not this browser process is receiving status
// messages about the focused edit control from a renderer process.
bool ime_notification_;
// Represents whether or not the IME of a browser process is active.
bool input_method_is_active_;
// Stores the current text input type received by ImeUpdateTextInputState()
// method.
WebKit::WebTextInputType text_input_type_;
// Stores the current caret bounds of input focus.
WebKit::WebRect caret_bounds_;
#endif
#if defined(TOOLKIT_USES_GTK)
// Since GtkWindow resize is asynchronous, we have to stash the dimensions,
// so that the backing store doesn't have to wait for sizing to take place.
gfx::Size logical_size_;
#endif
WebKit::WebKeyboardEvent last_key_event_;
#ifndef NDEBUG
bool painting_;
#endif
private:
ScopedRunnableMethodFactory<WebWidgetHost> factory_;
};
#endif // _WEBWIDGET_HOST_H