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