summaryrefslogtreecommitdiffstats
path: root/khtml/rendering/render_object.h
diff options
context:
space:
mode:
Diffstat (limited to 'khtml/rendering/render_object.h')
-rw-r--r--khtml/rendering/render_object.h865
1 files changed, 865 insertions, 0 deletions
diff --git a/khtml/rendering/render_object.h b/khtml/rendering/render_object.h
new file mode 100644
index 000000000..6b98a5fa4
--- /dev/null
+++ b/khtml/rendering/render_object.h
@@ -0,0 +1,865 @@
+/*
+ * This file is part of the html renderer for KDE.
+ *
+ * Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Antti Koivisto (koivisto@kde.org)
+ * (C) 2000-2003 Dirk Mueller (mueller@kde.org)
+ * (C) 2002-2003 Apple Computer, Inc.
+ * (C) 2004 Allan Sandfeld Jensen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef render_object_h
+#define render_object_h
+
+#include <qcolor.h>
+#include <qrect.h>
+#include <assert.h>
+#include <qvaluelist.h>
+
+#include <kdebug.h>
+#include <kglobal.h>
+
+#include "xml/dom_docimpl.h"
+#include "misc/khtmllayout.h"
+#include "misc/loader_client.h"
+#include "misc/helper.h"
+#include "rendering/render_style.h"
+
+class QPainter;
+class QTextStream;
+class CSSStyle;
+class KHTMLView;
+
+#ifndef NDEBUG
+#define KHTMLAssert( x ) if( !(x) ) { \
+ const RenderObject *o = this; while( o->parent() ) o = o->parent(); \
+ o->printTree(); \
+ qDebug(" this object = %p, %s", (void*) this, kdBacktrace().latin1() ); \
+ assert( x ); \
+}
+#else
+#define KHTMLAssert( x )
+#endif
+
+/*
+ * The painting of a layer occurs in three distinct phases. Each phase involves
+ * a recursive descent into the layer's render objects. The first phase is the background phase.
+ * The backgrounds and borders of all blocks are painted. Inlines are not painted at all.
+ * Floats must paint above block backgrounds but entirely below inline content that can overlap them.
+ * In the foreground phase, all inlines are fully painted. Inline replaced elements will get all
+ * three phases invoked on them during this phase.
+ */
+
+typedef enum {
+ PaintActionElementBackground = 0,
+ PaintActionChildBackground,
+ PaintActionChildBackgrounds,
+ PaintActionFloat,
+ PaintActionForeground,
+ PaintActionOutline,
+ PaintActionSelection,
+ PaintActionCollapsedTableBorders
+} PaintAction;
+
+typedef enum {
+ HitTestAll = 0,
+ HitTestSelfOnly = 1,
+ HitTestChildrenOnly = 2
+} HitTestAction;
+
+typedef enum {
+ PageBreakNormal = 0, // all rules apply
+ PageBreakHarder = 1, // page-break-inside: avoid is ignored
+ PageBreakForced = 2 // page-break-after/before: avoid, orphans and widows ignored
+} PageBreakLevel;
+
+typedef enum {
+ LowPriority = 0,
+ NormalPriority = 1,
+ HighPriority = 2,
+ RealtimePriority = 3
+} Priority;
+
+inline PageBreakLevel operator| (PageBreakLevel a, PageBreakLevel b) {
+ if (a == PageBreakForced || b == PageBreakForced)
+ return PageBreakForced;
+ if (a == PageBreakHarder || b == PageBreakHarder)
+ return PageBreakHarder;
+ return PageBreakNormal;
+}
+
+namespace DOM {
+ class HTMLAreaElementImpl;
+ class DOMString;
+ class NodeImpl;
+ class DocumentImpl;
+ class ElementImpl;
+ class EventImpl;
+}
+
+namespace khtml {
+ class RenderFlow;
+ class RenderStyle;
+ class RenderTable;
+ class CachedObject;
+ class RenderObject;
+ class RenderCanvas;
+ class RenderText;
+ class RenderFrameSet;
+ class RenderArena;
+ class RenderLayer;
+ class RenderBlock;
+ class InlineBox;
+ class InlineFlowBox;
+ class CounterNode;
+
+/**
+ * Base Class for all rendering tree objects.
+ */
+class RenderObject : public CachedObjectClient
+{
+ RenderObject(const RenderObject&);
+ RenderObject& operator=(const RenderObject&);
+public:
+
+ RenderObject(DOM::NodeImpl* node);
+ virtual ~RenderObject();
+
+ RenderObject *parent() const { return m_parent; }
+
+ RenderObject *previousSibling() const { return m_previous; }
+ RenderObject *nextSibling() const { return m_next; }
+
+ virtual RenderObject *firstChild() const { return 0; }
+ virtual RenderObject *lastChild() const { return 0; }
+
+ RenderObject *nextRenderer() const;
+ RenderObject *previousRenderer() const;
+
+ virtual bool childAllowed() const { return false; }
+ virtual int borderTopExtra() const { return 0; }
+ virtual int borderBottomExtra() const { return 0; }
+
+ virtual RenderLayer* layer() const { return 0; }
+ RenderLayer* enclosingLayer() const;
+ RenderLayer* enclosingStackingContext() const;
+ void addLayers(RenderLayer* parentLayer, RenderObject* newObject);
+ void removeLayers(RenderLayer* parentLayer);
+ void moveLayers(RenderLayer* oldParent, RenderLayer* newParent);
+ RenderLayer* findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint,
+ bool checkParent=true);
+ virtual void positionChildLayers() { }
+ virtual bool requiresLayer() const {
+ return isRoot()/* ### */ || isPositioned() || isRelPositioned() || hasOverflowClip();
+ }
+
+ // ### rename to overflowClipRect and clipRect
+ virtual QRect getOverflowClipRect(int /*tx*/, int /*ty*/)
+ { return QRect(0,0,0,0); }
+ virtual QRect getClipRect(int /*tx*/, int /*ty*/) { return QRect(0,0,0,0); }
+ bool hasClip() const { return isPositioned() && style()->hasClip(); }
+ bool hasOverflowClip() const { return m_hasOverflowClip; }
+
+ bool scrollsOverflow() const { return scrollsOverflowX() || scrollsOverflowY(); }
+ bool scrollsOverflowX() const { return hasOverflowClip() && (style()->overflowX() == OSCROLL || style()->overflowX() == OAUTO); }
+ bool scrollsOverflowY() const { return hasOverflowClip() && (style()->overflowY() == OSCROLL || style()->overflowY() == OAUTO); }
+
+ virtual int getBaselineOfFirstLineBox() { return -1; } // Tables and blocks implement this.
+ virtual InlineFlowBox* getFirstLineBox() { return 0; } // Tables and blocks implement this.
+
+ // Whether or not a positioned element requires normal flow x/y to be computed
+ // to determine its position.
+ bool hasStaticX() const;
+ bool hasStaticY() const;
+
+ // Linear tree traversal
+ RenderObject *objectBelow() const;
+ RenderObject *objectAbove() const;
+
+ // Returns if an object has counter-increment or counter-reset
+ bool hasCounter(const QString& counter) const;
+ // Calculates the value of the counter
+ CounterNode* getCounter(const QString& counter, bool view = false, bool counters = false);
+ // Detaches all counterNodes
+ void detachCounters();
+
+
+protected:
+ // Helper functions for counter-cache
+ void insertCounter(const QString& counter, CounterNode* value);
+ CounterNode* lookupCounter(const QString& counter) const;
+
+public:
+ //////////////////////////////////////////
+ // RenderObject tree manipulation
+ virtual void addChild(RenderObject *newChild, RenderObject *beforeChild = 0);
+ void removeChild(RenderObject *oldChild);
+
+ // raw tree manipulation
+ virtual RenderObject* removeChildNode(RenderObject* child);
+ virtual void appendChildNode(RenderObject* child);
+ virtual void insertChildNode(RenderObject* child, RenderObject* before);
+ //////////////////////////////////////////
+
+ //////////////////////////////////////////
+ // Helper functions. Dangerous to use!
+ void setPreviousSibling(RenderObject *previous) { m_previous = previous; }
+ void setNextSibling(RenderObject *next) { m_next = next; }
+ void setParent(RenderObject *parent) { m_parent = parent; }
+ //////////////////////////////////////////
+
+public:
+ virtual const char *renderName() const { return "RenderObject"; }
+#ifdef ENABLE_DUMP
+ QString information() const;
+ virtual void printTree(int indent=0) const;
+ virtual void dump(QTextStream &stream, const QString &ind = QString::null) const;
+#endif
+
+ static RenderObject *createObject(DOM::NodeImpl* node, RenderStyle* style);
+
+ // 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);
+
+public:
+ RenderArena* renderArena() const;
+ virtual RenderFlow* continuation() const { return 0; }
+ virtual bool isInlineContinuation() const { return false; }
+
+
+ bool isRoot() const { return m_isRoot && !m_isAnonymous; }
+ void setIsRoot(bool b) { m_isRoot = b; }
+ bool isHR() const;
+ // some helper functions...
+ virtual bool isRenderBlock() const { return false; }
+ virtual bool isRenderInline() const { return false; }
+ virtual bool isInlineFlow() const { return false; }
+ virtual bool isBlockFlow() const { return false; }
+ virtual bool isInlineBlockOrInlineTable() const { return false; }
+ virtual bool childrenInline() const { return false; }
+ virtual bool isBox() const { return false; }
+ virtual bool isRenderReplaced() const { return false; }
+
+ virtual bool isGlyph() const { return false; }
+ virtual bool isCounter() const { return false; }
+ virtual bool isQuote() const { return false; }
+ virtual bool isListItem() const { return false; }
+ virtual bool isListMarker() const { return false; }
+ virtual bool isCanvas() const { return false; }
+ virtual bool isBR() const { return false; }
+ virtual bool isTableCell() const { return false; }
+ virtual bool isTableRow() const { return false; }
+ virtual bool isTableSection() const { return false; }
+ virtual bool isTableCol() const { return false; }
+ virtual bool isTable() const { return false; }
+ virtual bool isWidget() const { return false; }
+ virtual bool isBody() const { return false; }
+ virtual bool isFormElement() const { return false; }
+ virtual bool isFrameSet() const { return false; }
+ virtual bool isApplet() const { return false; }
+
+ bool isHTMLMarquee() const;
+
+ bool isAnonymous() const { return m_isAnonymous; }
+ void setIsAnonymous(bool b) { m_isAnonymous = b; }
+ bool isAnonymousBlock() const { return isAnonymous() && style()->display() == BLOCK && node()->isDocumentNode(); }
+ bool isPseudoAnonymous() const { return isAnonymous() && !node()->isDocumentNode(); }
+
+ bool isFloating() const { return m_floating; }
+ bool isPositioned() const { return m_positioned; }
+ bool isRelPositioned() const { return m_relPositioned; }
+ bool isText() const { return m_isText; }
+ bool isInline() const { return m_inline; }
+ bool isCompact() const { return style()->display() == COMPACT; } // compact
+ bool isRunIn() const { return style()->display() == RUN_IN; } // run-in object
+ bool mouseInside() const;
+ bool isReplaced() const { return m_replaced; }
+ bool isReplacedBlock() const { return isInline() && isReplaced() && isRenderBlock(); }
+ bool shouldPaintBackgroundOrBorder() const { return m_paintBackground; }
+ bool needsLayout() const { return m_needsLayout || m_normalChildNeedsLayout || m_posChildNeedsLayout; }
+ bool markedForRepaint() const { return m_markedForRepaint; }
+ void setMarkedForRepaint(bool m) { m_markedForRepaint = m; }
+ bool selfNeedsLayout() const { return m_needsLayout; }
+ bool posChildNeedsLayout() const { return m_posChildNeedsLayout; }
+ bool normalChildNeedsLayout() const { return m_normalChildNeedsLayout; }
+ bool minMaxKnown() const{ return m_minMaxKnown; }
+ bool overhangingContents() const { return m_overhangingContents; }
+ bool hasFirstLine() const { return m_hasFirstLine; }
+ bool isSelectionBorder() const { return m_isSelectionBorder; }
+ bool recalcMinMax() const { return m_recalcMinMax; }
+
+ RenderCanvas* canvas() const;
+ // don't even think about making this method virtual!
+ DOM::DocumentImpl* document() const;
+ DOM::NodeImpl* element() const { return isAnonymous() ? 0L : m_node; }
+ DOM::NodeImpl* node() const { return m_node; }
+
+ /**
+ * returns the object containing this one. can be different from parent for
+ * positioned elements
+ */
+ RenderObject *container() const;
+
+ void setOverhangingContents(bool p=true);
+ void markContainingBlocksForLayout();
+ void dirtyFormattingContext( bool checkContainer );
+ void repaintDuringLayout();
+ void setNeedsLayout(bool b, bool markParents = true);
+ void setChildNeedsLayout(bool b, bool markParents = true);
+ void setMinMaxKnown(bool b=true) {
+ m_minMaxKnown = b;
+ if ( !b ) {
+ RenderObject *o = this;
+ RenderObject *root = this;
+ while( o ) { // ### && !o->m_recalcMinMax ) {
+ o->m_recalcMinMax = true;
+ root = o;
+ o = o->m_parent;
+ }
+ }
+ }
+ void setNeedsLayoutAndMinMaxRecalc() {
+ setMinMaxKnown(false);
+ setNeedsLayout(true);
+ }
+ void setPositioned(bool b=true) { m_positioned = b; }
+ void setRelPositioned(bool b=true) { m_relPositioned = b; }
+ void setFloating(bool b=true) { m_floating = b; }
+ void setInline(bool b=true) { m_inline = b; }
+ void setMouseInside(bool b=true) { m_mouseInside = b; }
+ void setShouldPaintBackgroundOrBorder(bool b=true) { m_paintBackground = b; }
+ void setRenderText() { m_isText = true; }
+ void setReplaced(bool b=true) { m_replaced = b; }
+ void setHasOverflowClip(bool b = true) { m_hasOverflowClip = b; }
+ void setIsSelectionBorder(bool b=true) { m_isSelectionBorder = b; }
+
+ void scheduleRelayout(RenderObject *clippedObj = 0);
+
+ void updateBackgroundImages(RenderStyle* oldStyle);
+
+ virtual InlineBox* createInlineBox(bool makePlaceHolderBox, bool isRootLineBox);
+
+ virtual short lineHeight( bool firstLine ) const;
+ virtual short verticalPositionHint( bool firstLine ) const;
+ virtual short baselinePosition( bool firstLine ) const;
+ short getVerticalPosition( bool firstLine, RenderObject* ref=0 ) const;
+
+ /*
+ * Print the object and its children, clipped by (x|y|w|h).
+ * (tx|ty) is the calculated position of the parent
+ */
+ struct PaintInfo {
+ PaintInfo(QPainter* _p, const QRect& _r, PaintAction _phase)
+ : p(_p), r(_r), phase(_phase), outlineObjects(0) {}
+ ~PaintInfo() { delete outlineObjects; }
+ QPainter* p;
+ QRect r;
+ PaintAction phase;
+ QValueList<RenderFlow *>* outlineObjects; // used to list which outlines should be painted by a block with inline children
+ };
+ virtual void paint( PaintInfo& i, int tx, int ty);
+
+ void paintBorder(QPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style, bool begin=true, bool end=true);
+ void paintOutline(QPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style);
+
+ virtual void paintBoxDecorations(PaintInfo&, int /*_tx*/, int /*_ty*/) {}
+
+ virtual void paintBackgroundExtended(QPainter* /*p*/, const QColor& /*c*/, const BackgroundLayer */*bgLayer*/,
+ int /*clipy*/, int /*cliph*/, int /*_tx*/, int /*_ty*/,
+ int /*w*/, int /*height*/, int /*bleft*/, int /*bright*/, int /*pleft*/, int /*pright*/ ) {}
+
+
+ /*
+ * This function calculates the minimum & maximum width that the object
+ * can be set to.
+ *
+ * when the Element calls setMinMaxKnown(true), calcMinMaxWidth() will
+ * be no longer called.
+ *
+ * when a element has a fixed size, m_minWidth and m_maxWidth should be
+ * set to the same value. This has the special meaning that m_width,
+ * contains the actual value.
+ *
+ * assumes calcMinMaxWidth has already been called for all children.
+ */
+ virtual void calcMinMaxWidth() { }
+
+ /*
+ * Does the min max width recalculations after changes.
+ */
+ void recalcMinMaxWidths();
+
+ /*
+ * Calculates the actual width of the object (only for non inline
+ * objects)
+ */
+ virtual void calcWidth() {}
+
+ /*
+ * Calculates the actual width of the object (only for non inline
+ * objects)
+ */
+ virtual void calcHeight() {}
+
+ /*
+ * This function should cause the Element to calculate its
+ * width and height and the layout of its content
+ *
+ * when the Element calls setNeedsLayout(false), layout() is no
+ * longer called during relayouts, as long as there is no
+ * style sheet change. When that occurs, m_needsLayout will be
+ * set to true and the Element receives layout() calls
+ * again.
+ */
+ virtual void layout() = 0;
+
+ /* This function performs a layout only if one is needed. */
+ void layoutIfNeeded() { if (needsLayout()) layout(); }
+
+ // used for element state updates that can not be fixed with a
+ // repaint and do not need a relayout
+ virtual void updateFromElement() {}
+
+ // Called immediately after render-object is inserted
+ virtual void attach() { m_attached = true; }
+ bool attached() { return m_attached; }
+ // The corresponding closing element has been parsed. ### remove me
+ virtual void close() { }
+
+ virtual int availableHeight() const { return 0; }
+
+ // Whether or not the element shrinks to its max width (rather than filling the width
+ // of a containing block). HTML4 buttons, legends, and floating/compact elements do this.
+ bool sizesToMaxWidth() const;
+
+ /*
+ * NeesPageClear indicates the object crossed a page-break but could not break itself and now
+ * needs to be moved clear by its parent.
+ */
+ void setNeedsPageClear(bool b = true) { m_needsPageClear = b; }
+ virtual bool needsPageClear() const { return m_needsPageClear; }
+
+ /*
+ * ContainsPageBreak indicates the object contains a clean page-break.
+ * ### should be removed and replaced with (crossesPageBreak && !needsPageClear)
+ */
+ void setContainsPageBreak(bool b = true) { m_containsPageBreak = b; }
+ virtual bool containsPageBreak() const { return m_containsPageBreak; }
+
+ virtual int pageTopAfter(int y) const { if (parent()) return parent()->pageTopAfter(y); else return 0; }
+
+ virtual int crossesPageBreak(int top, int bottom) const
+ { if (parent()) return parent()->crossesPageBreak(top, bottom); else return 0; }
+
+ // Checks if a page-break before child is possible at the given page-break level
+ // false means the child should attempt the break self.
+ virtual bool canClear(RenderObject */*child*/, PageBreakLevel level)
+ { if (parent()) return parent()->canClear(this, level); else return false; }
+
+ void setAfterPageBreak(bool b = true) { m_afterPageBreak = b; };
+ void setBeforePageBreak(bool b = true) { m_beforePageBreak = b; };
+ virtual bool afterPageBreak() const { return m_afterPageBreak; }
+ virtual bool beforePageBreak() const { return m_beforePageBreak; }
+
+ // does a query on the rendertree and finds the innernode
+ // and overURL for the given position
+ // if readonly == false, it will recalc hover styles accordingly
+ class NodeInfo
+ {
+ friend class RenderImage;
+ friend class RenderFlow;
+ friend class RenderInline;
+ friend class RenderText;
+ friend class RenderWidget;
+ friend class RenderObject;
+ friend class RenderFrameSet;
+ friend class RenderLayer;
+ friend class DOM::HTMLAreaElementImpl;
+ public:
+ NodeInfo(bool readonly, bool active)
+ : m_innerNode(0), m_innerNonSharedNode(0), m_innerURLElement(0), m_readonly(readonly), m_active(active)
+ { }
+
+ DOM::NodeImpl* innerNode() const { return m_innerNode; }
+ DOM::NodeImpl* innerNonSharedNode() const { return m_innerNonSharedNode; }
+ DOM::NodeImpl* URLElement() const { return m_innerURLElement; }
+ bool readonly() const { return m_readonly; }
+ bool active() const { return m_active; }
+
+ private:
+ void setInnerNode(DOM::NodeImpl* n) { m_innerNode = n; }
+ void setInnerNonSharedNode(DOM::NodeImpl* n) { m_innerNonSharedNode = n; }
+ void setURLElement(DOM::NodeImpl* n) { m_innerURLElement = n; }
+
+ DOM::NodeImpl* m_innerNode;
+ DOM::NodeImpl* m_innerNonSharedNode;
+ DOM::NodeImpl* m_innerURLElement;
+ bool m_readonly;
+ bool m_active;
+ };
+
+ /** contains stateful information for a checkSelectionPoint call
+ */
+ struct SelPointState {
+ /** last node that was before the current position */
+ DOM::NodeImpl *m_lastNode;
+ /** offset of last node */
+ long m_lastOffset;
+ /** true when the last node had the result SelectionAfterInLine */
+ bool m_afterInLine;
+
+ SelPointState() : m_lastNode(0), m_lastOffset(0), m_afterInLine(false)
+ {}
+ };
+
+ virtual FindSelectionResult checkSelectionPoint( int _x, int _y, int _tx, int _ty,
+ DOM::NodeImpl*&, int & offset,
+ SelPointState & );
+ virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, HitTestAction, bool inside = false);
+ void setInnerNode(NodeInfo& info);
+
+ // set the style of the object.
+ virtual void setStyle(RenderStyle *style);
+
+ // returns the containing block level element for this element.
+ RenderBlock *containingBlock() const;
+
+ // return just the width of the containing block
+ virtual short containingBlockWidth() const;
+ // return just the height of the containing block
+ virtual int containingBlockHeight() const;
+
+ // size of the content area (box size minus padding/border)
+ virtual short contentWidth() const { return 0; }
+ virtual int contentHeight() const { return 0; }
+
+ // intrinsic extend of replaced elements. undefined otherwise
+ virtual short intrinsicWidth() const { return 0; }
+ virtual int intrinsicHeight() const { return 0; }
+
+ // relative to parent node
+ virtual void setPos( int /*xPos*/, int /*yPos*/ ) { }
+ virtual void setWidth( int /*width*/ ) { }
+ virtual void setHeight( int /*height*/ ) { }
+
+ virtual int xPos() const { return 0; }
+ virtual int yPos() const { return 0; }
+
+ /** the position of the object from where it begins drawing, including
+ * its negative overflow
+ */
+ int effectiveXPos() const { return xPos() + (hasOverflowClip() ? 0 : overflowLeft()); }
+
+ /** the position of the object from where it begins drawing, including
+ * its negative overflow
+ */
+ int effectiveYPos() const { return yPos() + (hasOverflowClip() ? -borderTopExtra() : kMin(overflowTop(), -borderTopExtra())); }
+
+ /** Leftmost coordinate of this inline element relative to containing
+ * block. Always zero for non-inline elements.
+ */
+ virtual int inlineXPos() const { return 0; }
+ /** Topmost coordinate of this inline element relative to containing
+ * block. Always zero for non-inline elements.
+ */
+ virtual int inlineYPos() const { return 0; }
+
+ // calculate client position of box
+ virtual bool absolutePosition(int &/*xPos*/, int &/*yPos*/, bool fixed = false) const;
+
+ // width and height are without margins but include paddings and borders
+ virtual short width() const { return 0; }
+ virtual int height() const { return 0; }
+
+ // The height of a block when you include overflow spillage out of
+ // the bottom of the block (e.g., a <div style="height:25px"> that
+ // has a 100px tall image inside it would have an overflow height
+ // of borderTop() + paddingTop() + 100px.
+ virtual int overflowHeight() const { return height(); }
+ virtual int overflowWidth() const { return width(); }
+ // how much goes over the left hand side (0 or a negative number)
+ virtual int overflowTop() const { return 0; }
+ virtual int overflowLeft() const { return 0; }
+
+ /**
+ * Returns the height that is effectively considered when contemplating the
+ * object as a whole -- usually the overflow height, or the height if clipped.
+ */
+ int effectiveHeight() const { return hasOverflowClip() ? height() + borderTopExtra() + borderBottomExtra() :
+ kMax(overflowHeight() - overflowTop(), height() + borderTopExtra() + borderBottomExtra()); }
+ /**
+ * Returns the width that is effectively considered when contemplating the
+ * object as a whole -- usually the overflow width, or the width if clipped.
+ */
+ int effectiveWidth() const { return hasOverflowClip() ? width() : overflowWidth() - overflowLeft(); }
+
+ // IE extensions, heavily used in ECMA
+ virtual short offsetWidth() const { return width(); }
+ virtual int offsetHeight() const { return height() + borderTopExtra() + borderBottomExtra(); }
+ virtual int offsetLeft() const;
+ virtual int offsetTop() const;
+ virtual RenderObject* offsetParent() const;
+ short clientWidth() const;
+ int clientHeight() const;
+ short scrollWidth() const;
+ int scrollHeight() const;
+
+ virtual bool isSelfCollapsingBlock() const { return false; }
+ short collapsedMarginTop() const { return maxTopMargin(true)-maxTopMargin(false); }
+ short collapsedMarginBottom() const { return maxBottomMargin(true)-maxBottomMargin(false); }
+
+ virtual bool isTopMarginQuirk() const { return false; }
+ virtual bool isBottomMarginQuirk() const { return false; }
+ virtual short maxTopMargin(bool positive) const
+ { return positive ? kMax( int( marginTop() ), 0 ) : - kMin( int( marginTop() ), 0 ); }
+ virtual short maxBottomMargin(bool positive) const
+ { return positive ? kMax( int( marginBottom() ), 0 ) : - kMin( int( marginBottom() ), 0 ); }
+
+ virtual short marginTop() const { return 0; }
+ virtual short marginBottom() const { return 0; }
+ virtual short marginLeft() const { return 0; }
+ virtual short marginRight() const { return 0; }
+
+ virtual int paddingTop() const;
+ virtual int paddingBottom() const;
+ virtual int paddingLeft() const;
+ virtual int paddingRight() const;
+
+ virtual int borderTop() const { return style()->borderTopWidth(); }
+ virtual int borderBottom() const { return style()->borderBottomWidth(); }
+ virtual int borderLeft() const { return style()->borderLeftWidth(); }
+ virtual int borderRight() const { return style()->borderRightWidth(); }
+
+ virtual short minWidth() const { return 0; }
+ virtual int maxWidth() const { return 0; }
+
+ RenderStyle* style() const { return m_style; }
+ RenderStyle* style( bool firstLine ) const {
+ RenderStyle *s = m_style;
+ if( firstLine && hasFirstLine() ) {
+ RenderStyle *pseudoStyle = style()->getPseudoStyle(RenderStyle::FIRST_LINE);
+ if ( pseudoStyle )
+ s = pseudoStyle;
+ }
+ return s;
+ }
+
+ void getTextDecorationColors(int decorations, QColor& underline, QColor& overline,
+ QColor& linethrough, bool quirksMode=false);
+
+ enum BorderSide {
+ BSTop, BSBottom, BSLeft, BSRight
+ };
+ void drawBorder(QPainter *p, int x1, int y1, int x2, int y2, BorderSide s,
+ QColor c, const QColor& textcolor, EBorderStyle style,
+ int adjbw1, int adjbw2, bool invalidisInvert = false);
+
+ // Used by collapsed border tables.
+ virtual void collectBorders(QValueList<CollapsedBorderValue>& borderStyles);
+
+ // force a complete repaint
+ virtual void repaint(Priority p = NormalPriority) { if(m_parent) m_parent->repaint(p); }
+ virtual void repaintRectangle(int x, int y, int w, int h, Priority p=NormalPriority, bool f=false);
+
+ virtual unsigned int length() const { return 1; }
+
+ virtual bool isHidden() const { return isFloating() || isPositioned(); }
+
+ // Special objects are objects that are neither really inline nor blocklevel
+ bool isFloatingOrPositioned() const { return (isFloating() || isPositioned()); };
+ virtual bool hasOverhangingFloats() const { return false; }
+ virtual bool hasFloats() const { return false; }
+ virtual bool containsFloat(RenderObject* /*o*/) const { return false; }
+ virtual void markAllDescendantsWithFloatsForLayout(RenderObject* /*floatToRemove*/ = 0) {}
+
+ bool flowAroundFloats() const;
+ bool usesLineWidth() const;
+
+ // positioning of inline children (bidi)
+ virtual void position(InlineBox*, int, int, bool) {}
+// virtual void position(int, int, int, int, int, bool, bool, int) {}
+
+ // Applied as a "slop" to dirty rect checks during the outline painting phase's dirty-rect checks.
+ int maximalOutlineSize(PaintAction p) const;
+
+ enum SelectionState {
+ SelectionNone,
+ SelectionStart,
+ SelectionInside,
+ SelectionEnd,
+ SelectionBoth
+ };
+
+ virtual SelectionState selectionState() const { return SelectionNone;}
+ virtual void setSelectionState(SelectionState) {}
+
+ /**
+ * Flags which influence the appearence and position
+ * @param CFOverride input overrides existing character, caret should be
+ * cover the whole character
+ * @param CFOutside coordinates are to be interpreted outside of the
+ * render object
+ * @param CFOutsideEnd coordinates are to be interpreted at the outside
+ * end of the render object (only valid if CFOutside is also set)
+ */
+ enum CaretFlags { CFOverride = 0x01, CFOutside = 0x02, CFOutsideEnd = 0x04 };
+
+ /**
+ * Returns the content coordinates of the caret within this render object.
+ * @param offset zero-based offset determining position within the render object.
+ * @param flags combination of enum CaretFlags
+ * @param _x returns the left coordinate
+ * @param _y returns the top coordinate
+ * @param width returns the caret's width
+ * @param height returns the caret's height
+ */
+ virtual void caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height);
+
+ // returns the lowest position of the lowest object in that particular object.
+ // This 'height' is relative to the topleft of the margin box of the object.
+ // Implemented in RenderFlow.
+ virtual int lowestPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+ virtual int rightmostPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+ virtual int leftmostPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+ virtual int highestPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+
+ // recursively invalidate current layout
+ // unused: void invalidateLayout();
+
+ virtual void calcVerticalMargins() {}
+ void removeFromObjectLists();
+
+ virtual void deleteInlineBoxes(RenderArena* arena=0) {(void)arena;}
+ virtual void detach( );
+
+ void setDoNotDelete(bool b) { m_doNotDelete = b; }
+ bool doNotDelete() const { return m_doNotDelete; }
+
+ const QFont &font(bool firstLine) const {
+ return style( firstLine )->font();
+ }
+
+ const QFontMetrics &fontMetrics(bool firstLine) const {
+ return style( firstLine )->fontMetrics();
+ }
+
+ /** returns the lowest possible value the caret offset may have to
+ * still point to a valid position.
+ *
+ * Returns 0 by default.
+ */
+ virtual long minOffset() const { return 0; }
+ /** returns the highest possible value the caret offset may have to
+ * still point to a valid position.
+ *
+ * Returns 0 by default, as generic elements are considered to have no
+ * width.
+ */
+ virtual long maxOffset() const { return 0; }
+
+ virtual void setPixmap(const QPixmap &, const QRect&, CachedImage *);
+
+ QRegion visibleFlowRegion(int x, int y) const;
+
+protected:
+ virtual void selectionStartEnd(int& spos, int& epos);
+
+ virtual QRect viewRect() const;
+ void remove();
+ void invalidateVerticalPositions();
+ bool attemptDirectLayerTranslation();
+ void updateWidgetMasks();
+
+ virtual void removeLeftoverAnonymousBoxes();
+
+ void arenaDelete(RenderArena *arena);
+
+private:
+ RenderStyle* m_style;
+ DOM::NodeImpl* m_node;
+ RenderObject *m_parent;
+ RenderObject *m_previous;
+ RenderObject *m_next;
+
+ short m_verticalPosition;
+
+ bool m_needsLayout : 1;
+ bool m_normalChildNeedsLayout : 1;
+ bool m_markedForRepaint : 1;
+ bool m_posChildNeedsLayout : 1;
+
+ bool m_minMaxKnown : 1;
+ bool m_floating : 1;
+
+ bool m_positioned : 1;
+ bool m_overhangingContents : 1;
+ bool m_relPositioned : 1;
+ bool m_paintBackground : 1; // if the box has something to paint in the
+ // background painting phase (background, border, etc)
+
+ bool m_isAnonymous : 1;
+ bool m_recalcMinMax : 1;
+ bool m_isText : 1;
+ bool m_inline : 1;
+ bool m_attached : 1;
+
+ bool m_replaced : 1;
+ bool m_mouseInside : 1;
+ bool m_hasFirstLine : 1;
+ bool m_isSelectionBorder : 1;
+
+ bool m_isRoot : 1;
+
+ bool m_beforePageBreak : 1;
+ bool m_afterPageBreak : 1;
+
+ bool m_needsPageClear : 1;
+ bool m_containsPageBreak : 1;
+
+ bool m_hasOverflowClip : 1;
+
+ bool m_doNotDelete : 1; // This object should not be auto-deleted
+
+ // ### we have 16 + 26 bits.
+
+
+ void arenaDelete(RenderArena *arena, void *objectBase);
+
+ friend class RenderLayer;
+ friend class RenderListItem;
+ friend class RenderContainer;
+ friend class RenderCanvas;
+};
+
+
+enum VerticalPositionHint {
+ PositionTop = -0x4000,
+ PositionBottom = 0x4000,
+ PositionUndefined = 0x3fff
+};
+
+} //namespace
+#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-25 04:52:54 +0000