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tdelibs/khtml/rendering/render_layer.h

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/*
* Copyright (C) 2003 Apple Computer, Inc.
*
* Portions are Copyright (C) 1998 Netscape Communications Corporation.
*
* Other contributors:
* Robert O'Callahan <roc+@cs.cmu.edu>
* David Baron <dbaron@fas.harvard.edu>
* Christian Biesinger <cbiesinger@web.de>
* Randall Jesup <rjesup@wgate.com>
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
* Josh Soref <timeless@mac.com>
* Boris Zbarsky <bzbarsky@mit.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Alternatively, the contents of this file may be used under the terms
* of either the Mozilla Public License Version 1.1, found at
* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
* (the "GPL"), in which case the provisions of the MPL or the GPL are
* applicable instead of those above. If you wish to allow use of your
* version of this file only under the terms of one of those two
* licenses (the MPL or the GPL) and not to allow others to use your
* version of this file under the LGPL, indicate your decision by
* deletingthe provisions above and replace them with the notice and
* other provisions required by the MPL or the GPL, as the case may be.
* If you do not delete the provisions above, a recipient may use your
* version of this file under any of the LGPL, the MPL or the GPL.
*/
#ifndef render_layer_h
#define render_layer_h
#include <qcolor.h>
#include <qrect.h>
#include <assert.h>
#include "render_object.h"
class QScrollBar;
template <class T> class QPtrVector;
namespace khtml {
class RenderStyle;
class RenderTable;
class CachedObject;
class RenderCanvas;
class RenderText;
class RenderFrameSet;
class RenderObject;
class RenderScrollMediator;
class RenderScrollMediator: public QObject
{
Q_OBJECT
public:
RenderScrollMediator(RenderLayer* layer)
:m_layer(layer) {}
public slots:
void slotValueChanged();
private:
RenderLayer* m_layer;
};
// This class handles the auto-scrolling of layers with overflow: marquee.
class Marquee: public QObject
{
Q_OBJECT
public:
Marquee(RenderLayer* l);
void timerEvent(QTimerEvent*);
int speed() const { return m_speed; }
int marqueeSpeed() const;
EMarqueeDirection direction() const;
EMarqueeDirection reverseDirection() const { return static_cast<EMarqueeDirection>(-direction()); }
bool isHorizontal() const;
bool isUnfurlMarquee() const;
int unfurlPos() const { return m_unfurlPos; }
EWhiteSpace whiteSpace() { return m_whiteSpace; }
int computePosition(EMarqueeDirection dir, bool stopAtClientEdge);
void setEnd(int end) { m_end = end; }
void start();
void suspend();
void stop();
void updateMarqueeStyle();
void updateMarqueePosition();
private:
RenderLayer* m_layer;
int m_currentLoop;
int m_totalLoops;
int m_timerId;
int m_start;
int m_end;
int m_speed;
int m_unfurlPos;
bool m_reset:1;
bool m_suspended:1;
bool m_stopped:1;
EWhiteSpace m_whiteSpace : 3;
EMarqueeDirection m_direction : 4;
};
class RenderLayer
{
public:
#ifdef APPLE_CHANGES
static QScrollBar* gScrollBar;
#endif
RenderLayer(RenderObject* object);
~RenderLayer();
RenderObject* renderer() const { return m_object; }
RenderLayer *parent() const { return m_parent; }
RenderLayer *previousSibling() const { return m_previous; }
RenderLayer *nextSibling() const { return m_next; }
RenderLayer *firstChild() const { return m_first; }
RenderLayer *lastChild() const { return m_last; }
void addChild(RenderLayer *newChild, RenderLayer* beforeChild = 0);
RenderLayer* removeChild(RenderLayer *oldChild);
void removeOnlyThisLayer();
void insertOnlyThisLayer();
void styleChanged();
Marquee* marquee() const { return m_marquee; }
void suspendMarquees();
bool isOverflowOnly() const { return m_isOverflowOnly; }
#ifdef APPLE_CHANGES
bool isTransparent();
RenderLayer* transparentAncestor();
#endif
RenderLayer* root() {
RenderLayer* curr = this;
while (curr->parent()) curr = curr->parent();
return curr;
}
int xPos() const { return m_x; }
int yPos() const { return m_y; }
short width() const;
int height() const;
short scrollWidth() const { return m_scrollWidth; }
int scrollHeight() const { return m_scrollHeight; }
void resize( int w, int h ) {
m_scrollWidth = w; m_scrollHeight = h;
}
void setPos( int xPos, int yPos ) {
m_x = xPos;
m_y = yPos;
}
// Scrolling methods for layers that can scroll their overflow.
void scrollOffset(int& x, int& y);
void subtractScrollOffset(int& x, int& y);
void checkInlineRelOffset(const RenderObject* o, int& x, int& y);
short scrollXOffset() { return m_scrollX; }
int scrollYOffset() { return m_scrollY; }
void scrollToOffset(int x, int y, bool updateScrollbars = true, bool repaint = true);
void scrollToXOffset(int x) { scrollToOffset(x, m_scrollY); }
void scrollToYOffset(int y) { scrollToOffset(m_scrollX, y); }
void showScrollbar(Qt::Orientation, bool);
QScrollBar* horizontalScrollbar() { return m_hBar; }
QScrollBar* verticalScrollbar() { return m_vBar; }
int verticalScrollbarWidth();
int horizontalScrollbarHeight();
void positionScrollbars(const QRect &damageRect);
void paintScrollbars(RenderObject::PaintInfo& pI);
void checkScrollbarsAfterLayout();
void slotValueChanged(int);
void repaint(Priority p=NormalPriority, bool markForRepaint = false);
void updateScrollPositionFromScrollbars();
void updateLayerPosition();
void updateLayerPositions( RenderLayer* rootLayer, bool doFullRepaint = false, bool checkForRepaint = false);
// Get the enclosing stacking context for this layer. A stacking context is a layer
// that has a non-auto z-index.
RenderLayer* stackingContext() const;
bool isStackingContext() const { return !hasAutoZIndex() || renderer()->isCanvas(); }
void dirtyZOrderLists();
void updateZOrderLists();
QPtrVector<RenderLayer>* posZOrderList() const { return m_posZOrderList; }
QPtrVector<RenderLayer>* negZOrderList() const { return m_negZOrderList; }
void dirtyOverflowList();
void updateOverflowList();
QValueList<RenderLayer*>* overflowList() const { return m_overflowList; }
void setHasOverlaidWidgets(bool b=true) { m_hasOverlaidWidgets = b; }
bool hasOverlaidWidgets() const { return m_hasOverlaidWidgets; }
QRegion getMask() const { return m_region; }
QRegion paintedRegion(RenderLayer* rootLayer);
void updateWidgetMasks(RenderLayer* rootLayer);
// Gets the nearest enclosing positioned ancestor layer (also includes
// the <html> layer and the root layer).
RenderLayer* enclosingPositionedAncestor() const;
void convertToLayerCoords(const RenderLayer* ancestorLayer, int& x, int& y) const;
bool hasAutoZIndex() const { return renderer()->style()->hasAutoZIndex(); }
int zIndex() const { return renderer()->style()->zIndex(); }
// The two main functions that use the layer system. The paint method
// paints the layers that intersect the damage rect from back to
// front. The nodeAtPoint method looks for mouse events by walking
// layers that intersect the point from front to back.
KDE_EXPORT void paint(QPainter *p, const QRect& damageRect, bool selectionOnly=false);
bool nodeAtPoint(RenderObject::NodeInfo& info, int x, int y);
// This method figures out our layerBounds in coordinates relative to
// |rootLayer}. It also computes our background and foreground clip rects
// for painting/event handling.
void calculateRects(const RenderLayer* rootLayer, const QRect& paintDirtyRect, QRect& layerBounds,
QRect& backgroundRect, QRect& foregroundRect);
void calculateClipRects(const RenderLayer* rootLayer, QRect& overflowClipRect,
QRect& posClipRect, QRect& fixedClipRect);
bool intersectsDamageRect(const QRect& layerBounds, const QRect& damageRect) const;
bool containsPoint(int x, int y, const QRect& damageRect) const;
void updateHoverActiveState(RenderObject::NodeInfo& info);
void detach(RenderArena* renderArena);
#ifdef ENABLE_DUMP
KDE_EXPORT void dump(QTextStream &stream, const QString &ind = QString::null);
#endif
// Overloaded new operator. Derived classes must override operator new
// in order to allocate out of the RenderArena.
void* operator new(size_t sz, RenderArena* renderArena) throw();
// Overridden to prevent the normal delete from being called.
void operator delete(void* ptr, size_t sz);
private:
// The normal operator new is disallowed on all render objects.
void* operator new(size_t sz) throw();
private:
void setNextSibling(RenderLayer* next) { m_next = next; }
void setPreviousSibling(RenderLayer* prev) { m_previous = prev; }
void setParent(RenderLayer* parent) { m_parent = parent; }
void setFirstChild(RenderLayer* first) { m_first = first; }
void setLastChild(RenderLayer* last) { m_last = last; }
void collectLayers(QPtrVector<RenderLayer>*&, QPtrVector<RenderLayer>*&);
KDE_EXPORT void paintLayer(RenderLayer* rootLayer, QPainter *p, const QRect& paintDirtyRect, bool selectionOnly=false);
RenderLayer* nodeAtPointForLayer(RenderLayer* rootLayer, RenderObject::NodeInfo& info,
int x, int y, const QRect& hitTestRect);
bool shouldBeOverflowOnly() const;
protected:
RenderObject* m_object;
RenderLayer* m_parent;
RenderLayer* m_previous;
RenderLayer* m_next;
RenderLayer* m_first;
RenderLayer* m_last;
// Our (x,y) coordinates are in our parent layer's coordinate space.
short m_x;
int m_y;
// Our scroll offsets if the view is scrolled.
short m_scrollX;
int m_scrollY;
// The width/height of our scrolled area.
short m_scrollWidth;
int m_scrollHeight;
// For layers with overflow, we have a pair of scrollbars.
QScrollBar* m_hBar;
QScrollBar* m_vBar;
RenderScrollMediator* m_scrollMediator;
// For layers that establish stacking contexts, m_posZOrderList holds a sorted list of all the
// descendant layers within the stacking context that have z-indices of 0 or greater
// (auto will count as 0). m_negZOrderList holds descendants within our stacking context with negative
// z-indices.
QPtrVector<RenderLayer>* m_posZOrderList;
QPtrVector<RenderLayer>* m_negZOrderList;
// This list contains our overflow child layers.
QValueList<RenderLayer*>* m_overflowList;
bool m_zOrderListsDirty: 1;
bool m_overflowListDirty: 1;
bool m_isOverflowOnly: 1;
bool m_markedForRepaint: 1;
bool m_hasOverlaidWidgets: 1;
QRect m_visibleRect;
QRegion m_region; // used by overlaid (non z-order aware) widgets
Marquee* m_marquee; // Used by layers with overflow:marquee
};
} // namespace
#endif