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346 lines
12 KiB
346 lines
12 KiB
/*
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* This file is part of the DOM implementation for KDE.
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*
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* (C) 1999-2003 Lars Knoll (knoll@kde.org)
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* (C) 2000-2003 Dirk Mueller (mueller@kde.org)
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* (C) 2003 Apple Computer, Inc.
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef RENDERTEXT_H
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#define RENDERTEXT_H
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#include "dom/dom_string.h"
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#include "xml/dom_stringimpl.h"
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#include "xml/dom_textimpl.h"
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#include "rendering/render_object.h"
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#include "rendering/render_line.h"
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#include <tqptrvector.h>
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#include <assert.h>
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class QPainter;
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class QFontMetrics;
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// Define a constant for soft hyphen's unicode value.
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#define SOFT_HYPHEN 173
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const int cNoTruncation = -1;
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const int cFullTruncation = -2;
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namespace khtml
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{
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class RenderText;
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class RenderStyle;
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class InlineTextBox : public InlineBox
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{
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public:
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InlineTextBox(RenderObject *obj)
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:InlineBox(obj),
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// ### necessary as some codepaths (<br>) do *not* initialize these (LS)
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m_start(0), m_len(0), m_truncation(cNoTruncation), m_reversed(false), m_toAdd(0)
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{
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}
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void detach(RenderArena* renderArena);
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virtual void clearTruncation() { m_truncation = cNoTruncation; }
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virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox);
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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.
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void* operator new(size_t sz) throw();
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public:
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void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; }
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int spaceAdd() { return m_toAdd; }
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virtual bool isInlineTextBox() const { return true; }
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void paint(RenderObject::PaintInfo& i, int tx, int ty);
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void paintDecoration(TQPainter *pt, const Font *f, int _tx, int _ty, int decoration);
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void paintShadow(TQPainter *pt, const Font* f, int _tx, int _ty, const ShadowData *shadow );
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void paintSelection(const Font *f, RenderText *text, TQPainter *p, RenderStyle* style, int tx, int ty, int startPos, int endPos, int deco);
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void selectionStartEnd(int& sPos, int& ePos);
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RenderObject::SelectionState selectionState();
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// Return before, after (offset set to max), or inside the text, at @p offset
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FindSelectionResult checkSelectionPoint(int _x, int _y, int _tx, int _ty, const Font *f, RenderText *text, int & offset, short lineheight);
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bool checkVerticalPoint(int _y, int _ty, int _h, int height)
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{ if((_ty + m_y > _y + _h) || (_ty + m_y + m_baseline + height < _y)) return false; return true; }
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/**
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* determines the offset into the DOMString of the character the given
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* coordinate points to.
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* The returned offset is never out of range.
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* @param _x given coordinate (relative to containing block)
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* @param ax returns exact coordinate the offset corresponds to
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* (relative to containing block)
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* @return the offset (relative to the RenderText object, not to this run)
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*/
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int offsetForPoint(int _x, int &ax) const;
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/**
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* calculates the with of the specified chunk in this text box.
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* @param pos zero-based position within the text box up to which
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* the width is to be determined
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* @return the width in pixels
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*/
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int widthFromStart(int pos) const;
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/** returns the lowest possible value the caret offset may have to
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* still point to a valid position.
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*/
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virtual long minOffset() const;
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/** returns the highest possible value the caret offset may have to
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* still point to a valid position.
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*/
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virtual long maxOffset() const;
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/** returns the associated render text
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*/
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const RenderText *renderText() const;
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RenderText *renderText();
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int m_start;
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unsigned short m_len;
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int m_truncation; // Where to truncate when text overflow is applied.
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// We use special constants to denote no truncation (the whole run paints)
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// and full truncation (nothing paints at all).
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bool m_reversed : 1;
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unsigned m_toAdd : 14; // for justified text
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private:
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// this is just for QVector::bsearch. Don't use it otherwise
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InlineTextBox(int _x, int _y)
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:InlineBox(0)
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{
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m_x = _x;
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m_y = _y;
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m_reversed = false;
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};
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friend class RenderText;
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};
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class InlineTextBoxArray : public TQPtrVector<InlineTextBox>
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{
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public:
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InlineTextBoxArray();
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InlineTextBox* first();
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int findFirstMatching( Item ) const;
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virtual int compareItems( Item, Item );
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};
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class RenderText : public RenderObject
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{
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friend class InlineTextBox;
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public:
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RenderText(DOM::NodeImpl* node, DOM::DOMStringImpl *_str);
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virtual ~RenderText();
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virtual bool isTextFragment() const;
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virtual DOM::DOMStringImpl* originalString() const;
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virtual const char *renderName() const { return "RenderText"; }
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virtual void setStyle(RenderStyle *style);
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virtual void paint( PaintInfo& i, int tx, int ty );
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virtual void deleteInlineBoxes(RenderArena* arena=0);
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DOM::DOMString data() const { return str; }
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DOM::DOMStringImpl *string() const { return str; }
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virtual InlineBox* createInlineBox(bool, bool);
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virtual void layout() {assert(false);}
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virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, HitTestAction hitTestAction, bool inBox);
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// Return before, after (offset set to max), or inside the text, at @p offset
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virtual FindSelectionResult checkSelectionPoint( int _x, int _y, int _tx, int _ty,
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DOM::NodeImpl*& node, int & offset,
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SelPointState & );
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unsigned int length() const { if (str) return str->l; else return 0; }
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TQChar *text() const { if (str) return str->s; else return 0; }
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unsigned int stringLength() const { return str->l; } // non virtual implementation of length()
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virtual void position(InlineBox* box, int from, int len, bool reverse);
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virtual unsigned int width(unsigned int from, unsigned int len, const Font *f) const;
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virtual unsigned int width(unsigned int from, unsigned int len, bool firstLine = false) const;
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virtual short width() const;
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virtual int height() const;
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// height of the contents (without paddings, margins and borders)
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virtual short lineHeight( bool firstLine ) const;
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virtual short baselinePosition( bool firstLine ) const;
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// overrides
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virtual void calcMinMaxWidth();
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virtual short minWidth() const { return m_minWidth; }
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virtual int maxWidth() const { return m_maxWidth; }
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void trimmedMinMaxWidth(short& beginMinW, bool& beginWS,
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short& endMinW, bool& endWS,
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bool& hasBreakableChar, bool& hasBreak,
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short& beginMaxW, short& endMaxW,
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short& minW, short& maxW, bool& stripFrontSpaces);
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bool containsOnlyWhitespace(unsigned int from, unsigned int len) const;
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ushort startMin() const { return m_startMin; }
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ushort endMin() const { return m_endMin; }
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// returns the minimum x position of all runs relative to the parent.
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// defaults to 0.
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int minXPos() const;
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virtual int inlineXPos() const;
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virtual int inlineYPos() const;
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bool hasReturn() const { return m_hasReturn; }
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virtual const TQFont &font();
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virtual short verticalPositionHint( bool firstLine ) const;
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bool isFixedWidthFont() const;
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void setText(DOM::DOMStringImpl *text, bool force=false);
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virtual SelectionState selectionState() const {return m_selectionState;}
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virtual void setSelectionState(SelectionState s) {m_selectionState = s; }
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virtual void caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height);
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virtual bool absolutePosition(int &/*xPos*/, int &/*yPos*/, bool f = false) const;
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bool posOfChar(int ch, int &x, int &y);
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virtual short marginLeft() const { return style()->marginLeft().minWidth(0); }
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virtual short marginRight() const { return style()->marginRight().minWidth(0); }
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virtual void repaint(Priority p=NormalPriority);
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bool hasBreakableChar() const { return m_hasBreakableChar; }
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const TQFontMetrics &metrics(bool firstLine) const;
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const Font *htmlFont(bool firstLine) const;
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DOM::TextImpl *element() const
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{ return static_cast<DOM::TextImpl*>(RenderObject::element()); }
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/** returns the lowest possible value the caret offset may have to
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* still point to a valid position.
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*/
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virtual long minOffset() const;
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/** returns the highest possible value the caret offset may have to
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* still point to a valid position.
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*/
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virtual long maxOffset() const;
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/** returns the number of inline text boxes
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*/
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unsigned inlineTextBoxCount() const { return m_lines.count(); }
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/** returns the array of inline text boxes for this render text.
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*/
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const InlineTextBoxArray &inlineTextBoxes() const { return m_lines; }
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#ifdef ENABLE_DUMP
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virtual void dump(TQTextStream &stream, const TQString &ind) const;
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#endif
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/** Find the text box that includes the character at @p offset
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* and return pos, which is the position of the char in the run.
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* @param offset zero-based offset into DOM string
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* @param pos returns relative position within text box
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* @param checkFirstLetter passing @p true will also regard :first-letter
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* boxes, if available.
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* @return the text box, or 0 if no match has been found
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*/
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InlineTextBox * findInlineTextBox( int offset, int &pos,
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bool checkFirstLetter = false );
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protected: // members
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InlineTextBoxArray m_lines;
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DOM::DOMStringImpl *str; //
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short m_lineHeight;
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short m_minWidth;
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int m_maxWidth;
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short m_beginMinWidth;
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short m_endMinWidth;
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SelectionState m_selectionState : 3 ;
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bool m_hasReturn : 1;
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bool m_hasBreakableChar : 1;
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bool m_hasBreak : 1;
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bool m_hasBeginWS : 1;
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bool m_hasEndWS : 1;
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ushort m_startMin : 8;
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ushort m_endMin : 8;
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};
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inline const RenderText* InlineTextBox::renderText() const
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{ return static_cast<RenderText*>( object() ); }
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inline RenderText* InlineTextBox::renderText()
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{ return static_cast<RenderText*>( object() ); }
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// Used to represent a text substring of an element, e.g., for text runs that are split because of
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// first letter and that must therefore have different styles (and positions in the render tree).
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// We cache offsets so that text transformations can be applied in such a way that we can recover
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// the original unaltered string from our corresponding DOM node.
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class RenderTextFragment : public RenderText
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{
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public:
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RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str,
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int startOffset, int endOffset);
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RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str);
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~RenderTextFragment();
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virtual bool isTextFragment() const;
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virtual const char *renderName() const { return "RenderTextFragment"; }
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uint start() const { return m_start; }
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uint end() const { return m_end; }
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DOM::DOMStringImpl* contentString() const { return m_generatedContentStr; }
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virtual DOM::DOMStringImpl* originalString() const;
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private:
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uint m_start;
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uint m_end;
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DOM::DOMStringImpl* m_generatedContentStr;
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};
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} // end namespace
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#endif
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