Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 345 insertions, 0 deletions

diff --git a/khtml/rendering/render_text.h b/khtml/rendering/render_text.h
new file mode 100644
index 000000000..c65973c99
--- /dev/null
+++ b/khtml/rendering/render_text.h
@@ -0,0 +1,345 @@
+/*
+ * This file is part of the DOM implementation for KDE.
+ *
+ * (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * (C) 2000-2003 Dirk Mueller (mueller@kde.org)
+ * (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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef RENDERTEXT_H
+#define RENDERTEXT_H
+
+#include "dom/dom_string.h"
+#include "xml/dom_stringimpl.h"
+#include "xml/dom_textimpl.h"
+#include "rendering/render_object.h"
+#include "rendering/render_line.h"
+
+#include <qptrvector.h>
+#include <assert.h>
+
+class QPainter;
+class QFontMetrics;
+
+// Define a constant for soft hyphen's unicode value.
+#define SOFT_HYPHEN 173
+
+const int cNoTruncation = -1;
+const int cFullTruncation = -2;
+
+namespace khtml
+{
+    class RenderText;
+    class RenderStyle;
+
+class InlineTextBox : public InlineBox
+{
+public:
+    InlineTextBox(RenderObject *obj)
+    	:InlineBox(obj),
+    	// ### necessary as some codepaths (<br>) do *not* initialize these (LS)
+    	m_start(0), m_len(0), m_truncation(cNoTruncation), m_reversed(false), m_toAdd(0)
+    {
+    }
+
+    void detach(RenderArena* renderArena);
+
+    virtual void clearTruncation() { m_truncation = cNoTruncation; }
+    virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox);
+
+    // 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.
+    void* operator new(size_t sz) throw();
+
+public:
+    void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; }
+    int spaceAdd() { return m_toAdd; }
+
+    virtual bool isInlineTextBox() const { return true; }
+
+    void paint(RenderObject::PaintInfo& i, int tx, int ty);
+    void paintDecoration(QPainter *pt, const Font *f, int _tx, int _ty, int decoration);
+    void paintShadow(QPainter *pt, const Font* f, int _tx, int _ty, const ShadowData *shadow );
+    void paintSelection(const Font *f, RenderText *text, QPainter *p, RenderStyle* style, int tx, int ty, int startPos, int endPos, int deco);
+    
+    void selectionStartEnd(int& sPos, int& ePos);
+    RenderObject::SelectionState selectionState();
+
+    // Return before, after (offset set to max), or inside the text, at @p offset
+    FindSelectionResult checkSelectionPoint(int _x, int _y, int _tx, int _ty, const Font *f, RenderText *text, int & offset, short lineheight);
+
+    bool checkVerticalPoint(int _y, int _ty, int _h, int height)
+    { if((_ty + m_y > _y + _h) || (_ty + m_y + m_baseline + height < _y)) return false; return true; }
+
+    /**
+     * determines the offset into the DOMString of the character the given
+     * coordinate points to.
+     * The returned offset is never out of range.
+     * @param _x given coordinate (relative to containing block)
+     * @param ax returns exact coordinate the offset corresponds to
+     *		(relative to containing block)
+     * @return the offset (relative to the RenderText object, not to this run)
+     */
+    int offsetForPoint(int _x, int &ax) const;
+
+    /**
+     * calculates the with of the specified chunk in this text box.
+     * @param pos zero-based position within the text box up to which
+     *	the width is to be determined
+     * @return the width in pixels
+     */
+    int widthFromStart(int pos) const;
+
+    /** returns the lowest possible value the caret offset may have to
+     * still point to a valid position.
+     */
+    virtual long minOffset() const;
+    /** returns the highest possible value the caret offset may have to
+     * still point to a valid position.
+     */
+    virtual long maxOffset() const;
+
+    /** returns the associated render text
+     */
+    const RenderText *renderText() const;
+    RenderText *renderText();
+
+    int m_start;
+    unsigned short m_len;
+
+    int m_truncation; // Where to truncate when text overflow is applied.
+                      // We use special constants to denote no truncation (the whole run paints)
+                      // and full truncation (nothing paints at all).
+
+    bool m_reversed : 1;
+    unsigned m_toAdd : 14; // for justified text
+private:
+    // this is just for QVector::bsearch. Don't use it otherwise
+    InlineTextBox(int _x, int _y)
+        :InlineBox(0)
+    {
+        m_x = _x;
+        m_y = _y;
+        m_reversed = false;
+    };
+    friend class RenderText;
+};
+
+class InlineTextBoxArray : public QPtrVector<InlineTextBox>
+{
+public:
+    InlineTextBoxArray();
+
+    InlineTextBox* first();
+
+    int	  findFirstMatching( Item ) const;
+    virtual int compareItems( Item, Item );
+};
+
+class RenderText : public RenderObject
+{
+    friend class InlineTextBox;
+
+public:
+    RenderText(DOM::NodeImpl* node, DOM::DOMStringImpl *_str);
+    virtual ~RenderText();
+
+    virtual bool isTextFragment() const;
+    virtual DOM::DOMStringImpl* originalString() const;
+
+    virtual const char *renderName() const { return "RenderText"; }
+
+    virtual void setStyle(RenderStyle *style);
+
+
+    virtual void paint( PaintInfo& i, int tx, int ty );
+
+    virtual void deleteInlineBoxes(RenderArena* arena=0);
+
+    DOM::DOMString data() const { return str; }
+    DOM::DOMStringImpl *string() const { return str; }
+
+    virtual InlineBox* createInlineBox(bool, bool);
+
+    virtual void layout() {assert(false);}
+
+    virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, HitTestAction hitTestAction, bool inBox);
+
+    // Return before, after (offset set to max), or inside the text, at @p offset
+    virtual FindSelectionResult checkSelectionPoint( int _x, int _y, int _tx, int _ty,
+                                                     DOM::NodeImpl*& node, int & offset,
+						     SelPointState & );
+
+    unsigned int length() const { if (str) return str->l; else return 0; }
+    QChar *text() const { if (str) return str->s; else return 0; }
+    unsigned int stringLength() const { return str->l; } // non virtual implementation of length()
+    virtual void position(InlineBox* box, int from, int len, bool reverse);
+
+    virtual unsigned int width(unsigned int from, unsigned int len, const Font *f) const;
+    virtual unsigned int width(unsigned int from, unsigned int len, bool firstLine = false) const;
+    virtual short width() const;
+    virtual int height() const;
+
+    // height of the contents (without paddings, margins and borders)
+    virtual short lineHeight( bool firstLine ) const;
+    virtual short baselinePosition( bool firstLine ) const;
+
+    // overrides
+    virtual void calcMinMaxWidth();
+    virtual short minWidth() const { return m_minWidth; }
+    virtual int maxWidth() const { return m_maxWidth; }
+
+    void trimmedMinMaxWidth(short& beginMinW, bool& beginWS,
+                            short& endMinW, bool& endWS,
+                            bool& hasBreakableChar, bool& hasBreak,
+                            short& beginMaxW, short& endMaxW,
+                            short& minW, short& maxW, bool& stripFrontSpaces);
+
+    bool containsOnlyWhitespace(unsigned int from, unsigned int len) const;
+
+    ushort startMin() const { return m_startMin; }
+    ushort endMin() const { return m_endMin; }
+
+    // returns the minimum x position of all runs relative to the parent.
+    // defaults to 0.
+    int minXPos() const;
+
+    virtual int inlineXPos() const;
+    virtual int inlineYPos() const;
+
+    bool hasReturn() const { return m_hasReturn; }
+
+    virtual const QFont &font();
+    virtual short verticalPositionHint( bool firstLine ) const;
+
+    bool isFixedWidthFont() const;
+
+    void setText(DOM::DOMStringImpl *text, bool force=false);
+
+    virtual SelectionState selectionState() const {return m_selectionState;}
+    virtual void setSelectionState(SelectionState s) {m_selectionState = s; }
+    virtual void caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height);
+    virtual bool absolutePosition(int &/*xPos*/, int &/*yPos*/, bool f = false) const;
+    bool posOfChar(int ch, int &x, int &y);
+
+    virtual short marginLeft() const { return style()->marginLeft().minWidth(0); }
+    virtual short marginRight() const { return style()->marginRight().minWidth(0); }
+
+    virtual void repaint(Priority p=NormalPriority);
+
+    bool hasBreakableChar() const { return m_hasBreakableChar; }
+    const QFontMetrics &metrics(bool firstLine) const;
+    const Font *htmlFont(bool firstLine) const;
+
+    DOM::TextImpl *element() const
+    { return static_cast<DOM::TextImpl*>(RenderObject::element()); }
+
+    /** returns the lowest possible value the caret offset may have to
+     * still point to a valid position.
+     */
+    virtual long minOffset() const;
+
+    /** returns the highest possible value the caret offset may have to
+     * still point to a valid position.
+     */
+    virtual long maxOffset() const;
+
+    /** returns the number of inline text boxes
+     */
+    unsigned inlineTextBoxCount() const { return m_lines.count(); }
+    /** returns the array of inline text boxes for this render text.
+     */
+    const InlineTextBoxArray &inlineTextBoxes() const { return m_lines; }
+
+#ifdef ENABLE_DUMP
+    virtual void dump(QTextStream &stream, const QString &ind) const;
+#endif
+
+    /** Find the text box that includes the character at @p offset
+     * and return pos, which is the position of the char in the run.
+     * @param offset zero-based offset into DOM string
+     * @param pos returns relative position within text box
+     * @param checkFirstLetter passing @p true will also regard :first-letter
+     *		boxes, if available.
+     * @return the text box, or 0 if no match has been found
+     */
+    InlineTextBox * findInlineTextBox( int offset, int &pos,
+    					bool checkFirstLetter = false );
+
+protected: // members
+    InlineTextBoxArray m_lines;
+    DOM::DOMStringImpl *str; //
+
+    short m_lineHeight;
+    short m_minWidth;
+    int   m_maxWidth;
+    short m_beginMinWidth;
+    short m_endMinWidth;
+
+    SelectionState m_selectionState : 3 ;
+    bool m_hasReturn : 1;
+    bool m_hasBreakableChar : 1;
+    bool m_hasBreak : 1;
+    bool m_hasBeginWS : 1;
+    bool m_hasEndWS : 1;
+
+    ushort m_startMin : 8;
+    ushort m_endMin : 8;
+};
+
+inline const RenderText* InlineTextBox::renderText() const
+{ return static_cast<RenderText*>( object() ); }
+
+inline RenderText* InlineTextBox::renderText()
+{ return static_cast<RenderText*>( object() ); }
+
+// Used to represent a text substring of an element, e.g., for text runs that are split because of
+// first letter and that must therefore have different styles (and positions in the render tree).
+// We cache offsets so that text transformations can be applied in such a way that we can recover
+// the original unaltered string from our corresponding DOM node.
+class RenderTextFragment : public RenderText
+{
+public:
+    RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str,
+                       int startOffset, int endOffset);
+    RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str);
+    ~RenderTextFragment();
+
+    virtual bool isTextFragment() const;
+    virtual const char *renderName() const { return "RenderTextFragment"; }
+
+    uint start() const { return m_start; }
+    uint end() const { return m_end; }
+
+    DOM::DOMStringImpl* contentString() const { return m_generatedContentStr; }
+    virtual DOM::DOMStringImpl* originalString() const;
+
+private:
+    uint m_start;
+    uint m_end;
+    DOM::DOMStringImpl* m_generatedContentStr;
+};
+} // end namespace
+#endif