/* * This file is part of the DOM implementation for KDE. * * Copyright (C) 1999 Lars Knoll (knoll@kde.org) * (C) 1999 Antti Koivisto (koivisto@kde.org) * Copyright (C) 2003 Apple Computer, Inc. * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * */ #ifndef RENDER_FLOW_H #define RENDER_FLOW_H #include #include "render_box.h" #include "bidi.h" namespace khtml { /** * all geometry managing stuff is only in the block elements. * * Inline elements don't layout themselves, but the whole paragraph * gets layouted by the surrounding block element. This is, because * one needs to know the whole paragraph to calculate bidirectional * behaviour of text, so putting the layouting routines in the inline * elements is impossible. */ class RenderFlow : public RenderBox { public: RenderFlow(DOM::NodeImpl* node); virtual ~RenderFlow(); virtual const char *renderName() const { if (isFloating()) return "Block (Floating)"; if (isPositioned()) return "Block (Positioned)"; if (isAnonymousBox()) return "Block (Anonymous)"; if (isInline()) { if (isRelPositioned()) return "Inline (Rel Positioned)"; return "Inline"; } if (isRelPositioned()) return "Block (Rel Positioned)"; return "Block"; }; virtual void setStyle(RenderStyle *style); virtual bool isFlow() const { return true; } virtual bool childrenInline() const { return m_childrenInline; } virtual void setChildrenInline(bool b) { m_childrenInline = b; } virtual bool isRendered() const { return true; } virtual RenderFlow* continuation() const { return m_continuation; } void setContinuation(RenderFlow* c) { m_continuation = c; } RenderFlow* continuationBefore(RenderObject* beforeChild); void splitInlines(RenderFlow* fromBlock, RenderFlow* toBlock, RenderFlow* middleBlock, RenderObject* beforeChild, RenderFlow* oldCont); void splitFlow(RenderObject* beforeChild, RenderFlow* newBlockBox, RenderObject* newChild, RenderFlow* oldCont); void addChildWithContinuation(RenderObject* newChild, RenderObject* beforeChild); void addChildToFlow(RenderObject* newChild, RenderObject* beforeChild); void removeChild(RenderObject *oldChild); void makeChildrenNonInline(RenderObject *box2Start = 0); // overrides RenderObject virtual void paint(QPainter *, int x, int y, int w, int h, int tx, int ty, int paintPhase); virtual void paintObject(QPainter *, int x, int y, int w, int h, int tx, int ty, int paintPhase); void paintFloats(QPainter *p, int _x, int _y, int _w, int _h, int _tx, int _ty); virtual bool requiresLayer() { return !isTableCell() && (isPositioned() || isRelPositioned() || style()->overflow()==OHIDDEN); } virtual void layout( ); virtual void close(); virtual void addChild(RenderObject *newChild, RenderObject *beforeChild = 0); virtual unsigned short lineWidth(int y) const; virtual int lowestPosition() const; virtual int rightmostPosition() const; int rightOffset() const; int rightRelOffset(int y, int fixedOffset, int *heightRemaining = 0) const; int rightOffset(int y) const { return rightRelOffset(y, rightOffset()); } int leftOffset() const; int leftRelOffset(int y, int fixedOffset, int *heightRemaining = 0) const; int leftOffset(int y) const { return leftRelOffset(y, leftOffset()); } #ifndef NDEBUG virtual void printTree(int indent=0) const; virtual void dump(QTextStream *stream, QString ind = "") const; #endif virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, bool inside=false); protected: virtual void newLine(); void layoutBlockChildren( bool relayoutChildren ); void layoutInlineChildren( bool relayoutChildren ); void layoutSpecialObjects( bool relayoutChildren ); public: int floatBottom() const; inline int leftBottom(); inline int rightBottom(); bool checkClear(RenderObject *child); // used to calculate offsetWidth/Height. Overridden by inlines (render_flow) to return // the remaining width on a given line (and the height of a single line). virtual short offsetWidth() const; virtual int offsetHeight() const; virtual int offsetLeft() const; virtual int offsetTop() const; void insertSpecialObject(RenderObject *o); // from BiDiParagraph virtual void closeParagraph() { positionNewFloats(); } void removeSpecialObject(RenderObject *o); // called from lineWidth, to position the floats added in the last line. void positionNewFloats(); void clearFloats(); virtual void calcMinMaxWidth(); void calcInlineMinMaxWidth(); void calcBlockMinMaxWidth(); virtual bool containsSpecial() { return specialObjects!=0; } virtual bool hasOverhangingFloats() { return floatBottom() > m_height; } void addOverHangingFloats( RenderFlow *flow, int xoffset, int yoffset, bool child = false ); // implementation of the following functions is in bidi.cpp void bidiReorderLine(const BidiIterator &start, const BidiIterator &end); BidiIterator findNextLineBreak(BidiIterator &start, QPtrList& midpoints); // The height (and width) of a block when you include overflow spillage out of the bottom // of the block (e.g., a
that has a 100px tall image inside // it would have an overflow height of borderTop() + paddingTop() + 100px. virtual int overflowHeight() const { return m_overflowHeight; } virtual int overflowWidth() const { return m_overflowWidth; } virtual bool isSelfCollapsingBlock() const { return m_height == 0; } virtual bool isTopMarginQuirk() const { return m_topMarginQuirk; } virtual bool isBottomMarginQuirk() const { return m_bottomMarginQuirk; } virtual short maxTopMargin(bool positive) const { if (positive) return m_maxTopPosMargin; else return m_maxTopNegMargin; } virtual short maxBottomMargin(bool positive) const { if (positive) return m_maxBottomPosMargin; else return m_maxBottomNegMargin; } protected: struct SpecialObject { enum Type { FloatLeft, FloatRight, Positioned }; SpecialObject(Type _type) { node = 0; startY = 0; endY = 0; type = _type; left = 0; width = 0; count = 0; noPaint = false; } RenderObject* node; int startY; int endY; short left; short width; short count; Type type : 2; // left or right aligned bool noPaint: 1; bool operator==(const SpecialObject& ) const { return false; } bool operator<(const SpecialObject& o) const { if(node->style()->zIndex() == o.node->style()->zIndex()) return count < o.count; return node->style()->zIndex() < o.node->style()->zIndex(); } }; QSortedList* specialObjects; private: bool m_childrenInline : 1; bool m_pre : 1; bool firstLine : 1; // used in inline layouting EClear m_clearStatus : 2; // used during layuting of paragraphs short m_maxTopPosMargin; short m_maxTopNegMargin; short m_maxBottomPosMargin; short m_maxBottomNegMargin; bool m_topMarginQuirk; bool m_bottomMarginQuirk; // How much content overflows out of our block vertically or horizontally (all we support // for now is spillage out of the bottom and the right, which are the common cases). // XXX Generalize to work with top and left as well. int m_overflowHeight; int m_overflowWidth; // An inline can be split with blocks occurring in between the inline content. // When this occurs we need a pointer to our next object. We can basically be // split into a sequence of inlines and blocks. The continuation will either be // an anonymous block (that houses other blocks) or it will be an inline flow. RenderFlow* m_continuation; }; }; //namespace #endif