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/*
* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2008 Collabora Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef Widget_h
#define Widget_h
#include <wtf/Platform.h>
#if PLATFORM(MAC)
#ifdef __OBJC__
@class NSView;
@class NSWindow;
#else
class NSView;
class NSWindow;
#endif
typedef NSView* PlatformWidget;
#endif
#if PLATFORM(ANDROID)
class WebCoreViewBridge;
typedef WebCoreViewBridge* PlatformWidget;
#endif
#if PLATFORM(WIN)
typedef struct HWND__* HWND;
typedef HWND PlatformWidget;
#endif
#if PLATFORM(GTK)
typedef struct _GdkDrawable GdkDrawable;
typedef struct _GtkWidget GtkWidget;
typedef struct _GtkContainer GtkContainer;
typedef GtkWidget* PlatformWidget;
#endif
#if PLATFORM(QT)
#include <qglobal.h>
QT_BEGIN_NAMESPACE
class QWidget;
QT_END_NAMESPACE
typedef QWidget* PlatformWidget;
#endif
#if PLATFORM(WX)
class wxWindow;
typedef wxWindow* PlatformWidget;
#endif
#if PLATFORM(HAIKU)
class BView;
typedef BView* PlatformWidget;
#endif
#if PLATFORM(CHROMIUM)
#include "PlatformWidget.h"
#endif
#if PLATFORM(QT)
class QWebPageClient;
typedef QWebPageClient* PlatformPageClient;
#else
typedef PlatformWidget PlatformPageClient;
#endif
#include "IntPoint.h"
#include "IntRect.h"
#include "IntSize.h"
#include <wtf/RefCounted.h>
namespace WebCore {
class Cursor;
class Event;
class Font;
class GraphicsContext;
class PlatformMouseEvent;
class ScrollView;
class WidgetPrivate;
// The Widget class serves as a base class for three kinds of objects:
// (1) Scrollable areas (ScrollView)
// (2) Scrollbars (Scrollbar)
// (3) Plugins (PluginView)
//
// A widget may or may not be backed by a platform-specific object (e.g., HWND on Windows, NSView on Mac, QWidget on Qt).
//
// Widgets are connected in a hierarchy, with the restriction that plugins and scrollbars are always leaves of the
// tree. Only ScrollViews can have children (and therefore the Widget class has no concept of children).
//
// The rules right now for which widgets get platform-specific objects are as follows:
// ScrollView - Mac
// Scrollbar - Mac, Gtk
// Plugin - Mac, Windows (windowed only), Qt (windowed only, widget is an HWND on windows), Gtk (windowed only)
//
class Widget : public RefCounted<Widget> {
public:
Widget(PlatformWidget = 0);
virtual ~Widget();
PlatformWidget platformWidget() const { return m_widget; }
void setPlatformWidget(PlatformWidget widget)
{
if (widget != m_widget) {
releasePlatformWidget();
m_widget = widget;
retainPlatformWidget();
}
}
int x() const { return frameRect().x(); }
int y() const { return frameRect().y(); }
int width() const { return frameRect().width(); }
int height() const { return frameRect().height(); }
IntSize size() const { return frameRect().size(); }
IntPoint pos() const { return frameRect().location(); }
virtual void setFrameRect(const IntRect&);
virtual IntRect frameRect() const;
IntRect boundsRect() const { return IntRect(0, 0, width(), height()); }
void resize(int w, int h) { setFrameRect(IntRect(x(), y(), w, h)); }
void resize(const IntSize& s) { setFrameRect(IntRect(pos(), s)); }
void move(int x, int y) { setFrameRect(IntRect(x, y, width(), height())); }
void move(const IntPoint& p) { setFrameRect(IntRect(p, size())); }
virtual void paint(GraphicsContext*, const IntRect&);
void invalidate() { invalidateRect(boundsRect()); }
virtual void invalidateRect(const IntRect&) = 0;
virtual void setFocus();
void setCursor(const Cursor&);
virtual void show();
virtual void hide();
bool isSelfVisible() const { return m_selfVisible; } // Whether or not we have been explicitly marked as visible or not.
bool isParentVisible() const { return m_parentVisible; } // Whether or not our parent is visible.
bool isVisible() const { return m_selfVisible && m_parentVisible; } // Whether or not we are actually visible.
virtual void setParentVisible(bool visible) { m_parentVisible = visible; }
void setSelfVisible(bool v) { m_selfVisible = v; }
void setIsSelected(bool);
virtual bool isFrameView() const { return false; }
virtual bool isPluginView() const { return false; }
virtual bool isScrollbar() const { return false; }
void removeFromParent();
virtual void setParent(ScrollView* view);
ScrollView* parent() const { return m_parent; }
ScrollView* root() const;
virtual void handleEvent(Event*) { }
// It is important for cross-platform code to realize that Mac has flipped coordinates. Therefore any code
// that tries to convert the location of a rect using the point-based convertFromContainingWindow will end
// up with an inaccurate rect. Always make sure to use the rect-based convertFromContainingWindow method
// when converting window rects.
IntRect convertToContainingWindow(const IntRect&) const;
IntRect convertFromContainingWindow(const IntRect&) const;
IntPoint convertToContainingWindow(const IntPoint&) const;
IntPoint convertFromContainingWindow(const IntPoint&) const;
virtual void frameRectsChanged() {}
#if PLATFORM(MAC) && !ENABLE(EXPERIMENTAL_SINGLE_VIEW_MODE)
NSView* getOuterView() const;
static void beforeMouseDown(NSView*, Widget*);
static void afterMouseDown(NSView*, Widget*);
void removeFromSuperview();
#endif
// Virtual methods to convert points to/from the containing ScrollView
virtual IntRect convertToContainingView(const IntRect&) const;
virtual IntRect convertFromContainingView(const IntRect&) const;
virtual IntPoint convertToContainingView(const IntPoint&) const;
virtual IntPoint convertFromContainingView(const IntPoint&) const;
private:
void init(PlatformWidget); // Must be called by all Widget constructors to initialize cross-platform data.
void releasePlatformWidget();
void retainPlatformWidget();
// These methods are used to convert from the root widget to the containing window,
// which has behavior that may differ between platforms (e.g. Mac uses flipped window coordinates).
static IntRect convertFromRootToContainingWindow(const Widget* rootWidget, const IntRect&);
static IntRect convertFromContainingWindowToRoot(const Widget* rootWidget, const IntRect&);
static IntPoint convertFromRootToContainingWindow(const Widget* rootWidget, const IntPoint&);
static IntPoint convertFromContainingWindowToRoot(const Widget* rootWidget, const IntPoint&);
private:
ScrollView* m_parent;
PlatformWidget m_widget;
bool m_selfVisible;
bool m_parentVisible;
IntRect m_frame; // Not used when a native widget exists.
#if PLATFORM(MAC) && !ENABLE(EXPERIMENTAL_SINGLE_VIEW_MODE)
WidgetPrivate* m_data;
#endif
#if PLATFORM(ANDROID)
public:
int screenWidth() const;
#endif
};
} // namespace WebCore
#endif // Widget_h
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