qtextlayout.cpp File Reference

#include "qtextlayout.h"
#include "qtextengine_p.h"
#include <qfont.h>
#include <qapplication.h>
#include <qmath.h>
#include <qpainter.h>
#include <qvarlengtharray.h>
#include <qtextformat.h>
#include <qabstracttextdocumentlayout.h>
#include "qtextdocument_p.h"
#include "qtextformat_p.h"
#include "qstyleoption.h"
#include "qpainterpath.h"
#include "qglyphrun.h"
#include "qglyphrun_p.h"
#include "qrawfont.h"
#include "qrawfont_p.h"
#include <limits.h>
#include <qdebug.h>
#include "qfontengine_p.h"
#include "qfontengine_ft_p.h"

Go to the source code of this file.

Macros
#define	LB_DEBUG   if (0) qDebug
#define	ObjectSelectionBrush   (QTextFormat::ForegroundBrush + 1)
#define	SuppressBackground   0x513
#define	SuppressText   0x5012

Functions
static void	addNextCluster (int &pos, int end, QScriptLine &line, int &glyphCount, const QScriptItem &current, const unsigned short *logClusters, const QGlyphLayout &glyphs)
static void	addSelectedRegionsToPath (QTextEngine *eng, int lineNumber, const QPointF &pos, QTextLayout::FormatRange *selection, QPainterPath *region, QRectF boundingRect)
static QRectF	clipIfValid (const QRectF &rect, const QRectF &clip)
static void	drawMenuText (QPainter *p, QFixed x, QFixed y, const QScriptItem &si, QTextItemInt &gf, QTextEngine *eng, int start, int glyph_start)
static void	setPenAndDrawBackground (QPainter *p, const QPen &defaultPen, const QTextCharFormat &chf, const QRectF &r)

Macro Definition Documentation

LB_DEBUG

#define LB_DEBUG   if (0) qDebug

Definition at line 1639 of file qtextlayout.cpp.

Referenced by QTextLine::layout_helper().

ObjectSelectionBrush

#define ObjectSelectionBrush   (QTextFormat::ForegroundBrush + 1)

Definition at line 72 of file qtextlayout.cpp.

Referenced by QTextLayout::draw(), and QTextLine::draw().

SuppressBackground

#define SuppressBackground   0x513

Definition at line 74 of file qtextlayout.cpp.

Referenced by QTextLayout::draw(), and setPenAndDrawBackground().

SuppressText

#define SuppressText   0x5012

Definition at line 73 of file qtextlayout.cpp.

Referenced by QTextLayout::draw(), and QTextLine::draw().

Function Documentation

addNextCluster()

static void addNextCluster ( int &  pos, int  end, QScriptLine &  line, int &  glyphCount, const QScriptItem &  current, const unsigned short *  logClusters, const QGlyphLayout &  glyphs  )

inlinestatic

Definition at line 1760 of file qtextlayout.cpp.

Referenced by QTextLine::layout_helper().

{
    int glyphPosition = logClusters[pos];
    do { // got to the first next cluster
        ++pos;
        ++line.length;
    } while (pos < end && logClusters[pos] == glyphPosition);
    do { // calculate the textWidth for the rest of the current cluster.
        if (!glyphs.attributes[glyphPosition].dontPrint)
            line.textWidth += glyphs.advances_x[glyphPosition];
        ++glyphPosition;
    } while (glyphPosition < current.num_glyphs && !glyphs.attributes[glyphPosition].clusterStart);

    Q_ASSERT((pos == end && glyphPosition == current.num_glyphs) || logClusters[pos] == glyphPosition);

    ++glyphCount;
}

addSelectedRegionsToPath()

static void addSelectedRegionsToPath ( QTextEngine *  eng, int  lineNumber, const QPointF &  pos, QTextLayout::FormatRange *  selection, QPainterPath *  region, QRectF  boundingRect  )

static

Definition at line 1000 of file qtextlayout.cpp.

Referenced by QTextLayout::draw().

{
    const QScriptLine &line = eng->lines[lineNumber];

    QTextLineItemIterator iterator(eng, lineNumber, pos, selection);



    const qreal selectionY = pos.y() + line.y.toReal();
    const qreal lineHeight = line.height().toReal();

    QFixed lastSelectionX = iterator.x;
    QFixed lastSelectionWidth;

    while (!iterator.atEnd()) {
        iterator.next();

        QFixed selectionX, selectionWidth;
        if (iterator.getSelectionBounds(&selectionX, &selectionWidth)) {
            if (selectionX == lastSelectionX + lastSelectionWidth) {
                lastSelectionWidth += selectionWidth;
                continue;
            }

            if (lastSelectionWidth > 0) {
                QRectF rect = boundingRect & QRectF(lastSelectionX.toReal(), selectionY, lastSelectionWidth.toReal(), lineHeight);
                rect.moveLeft(qFloor(rect.left()));
                rect.moveTop(qFloor(rect.top()));
                region->addRect(rect);
            }

            lastSelectionX = selectionX;
            lastSelectionWidth = selectionWidth;
        }
    }
    if (lastSelectionWidth > 0) {
        QRectF rect = boundingRect & QRectF(lastSelectionX.toReal(), selectionY, lastSelectionWidth.toReal(), lineHeight);
        rect.moveLeft(qFloor(rect.left()));
        rect.moveTop(qFloor(rect.top()));
        region->addRect(rect);
    }
}

clipIfValid()

static QRectF clipIfValid ( const QRectF &  rect, const QRectF &  clip  )

inlinestatic

Definition at line 1044 of file qtextlayout.cpp.

Referenced by QTextLayout::draw().

{
    return clip.isValid() ? (rect & clip) : rect;
}

drawMenuText()

static void drawMenuText ( QPainter *  p, QFixed  x, QFixed  y, const QScriptItem &  si, QTextItemInt &  gf, QTextEngine *  eng, int  start, int  glyph_start  )

static

Definition at line 2077 of file qtextlayout.cpp.

Referenced by QTextLine::draw().

{
    int ge = glyph_start + gf.glyphs.numGlyphs;
    int gs = glyph_start;
    int end = start + gf.num_chars;
    unsigned short *logClusters = eng->logClusters(&si);
    QGlyphLayout glyphs = eng->shapedGlyphs(&si);
    QFixed orig_width = gf.width;

    int *ul = eng->underlinePositions;
    if (ul)
        while (*ul != -1 && *ul < start)
            ++ul;
    bool rtl = si.analysis.bidiLevel % 2;
    if (rtl)
        x += si.width;

    do {
        int gtmp = ge;
        int stmp = end;
        if (ul && *ul != -1 && *ul < end) {
            stmp = *ul;
            gtmp = logClusters[*ul-si.position];
        }

        gf.glyphs = glyphs.mid(gs, gtmp - gs);
        gf.num_chars = stmp - start;
        gf.chars = eng->layoutData->string.unicode() + start;
        QFixed w = 0;
        while (gs < gtmp) {
            w += glyphs.effectiveAdvance(gs);
            ++gs;
        }
        start = stmp;
        gf.width = w;
        if (rtl)
            x -= w;
        if (gf.num_chars)
            p->drawTextItem(QPointF(x.toReal(), y.toReal()), gf);
        if (!rtl)
            x += w;
        if (ul && *ul != -1 && *ul < end) {
            // draw underline
            gtmp = (*ul == end-1) ? ge : logClusters[*ul+1-si.position];
            ++stmp;
            gf.glyphs = glyphs.mid(gs, gtmp - gs);
            gf.num_chars = stmp - start;
            gf.chars = eng->layoutData->string.unicode() + start;
            gf.logClusters = logClusters + start - si.position;
            w = 0;
            while (gs < gtmp) {
                w += glyphs.effectiveAdvance(gs);
                ++gs;
            }
            ++start;
            gf.width = w;
            gf.underlineStyle = QTextCharFormat::SingleUnderline;
            if (rtl)
                x -= w;
            p->drawTextItem(QPointF(x.toReal(), y.toReal()), gf);
            if (!rtl)
                x += w;
            gf.underlineStyle = QTextCharFormat::NoUnderline;
            ++gf.chars;
            ++ul;
        }
    } while (gs < ge);

    gf.width = orig_width;
}

setPenAndDrawBackground()

static void setPenAndDrawBackground ( QPainter *  p, const QPen &  defaultPen, const QTextCharFormat &  chf, const QRectF &  r  )

static

Definition at line 2150 of file qtextlayout.cpp.

Referenced by QTextLine::draw().

{
    QBrush c = chf.foreground();
    if (c.style() == Qt::NoBrush) {
        p->setPen(defaultPen);
    }

    QBrush bg = chf.background();
    if (bg.style() != Qt::NoBrush && !chf.property(SuppressBackground).toBool())
        p->fillRect(QRectF(qFloor(r.x()), qFloor(r.y()), r.width(), r.height()), bg);
    if (c.style() != Qt::NoBrush) {
        p->setPen(QPen(c, 0));
    }

}