AuroraMiddleware/qt5base-lts
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Enablers for TextInput

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In order to use the scene graph text node in TextInput, we
need enablers. Most of this is to enable selections,
which in turn means we need to be able to extract a certain
set of glyphs from a QTextLine.
This commit is contained in:
Eskil Abrahamsen Blomfeldt 2011-05-09 09:07:02 +02:00
parent 6e99936502
commit 5feefb0c03
8 changed files with 127 additions and 24 deletions
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29
src/gui/text/qglyphrun.cpp
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@ -319,6 +319,35 @@ void QGlyphRun::setStrikeOut(bool strikeOut)
d->strikeOut = strikeOut;
}
/*!
Returns the smallest rectangle that contains all glyphs in this QGlyphRun.
\since 5.0
*/
QRectF QGlyphRun::boundingRect() const
{
qreal minX, minY, maxX, maxY;
for (int i=0; i<qMin(d->glyphPositions.size(), d->glyphIndexes.size()); ++i) {
QRectF glyphRect = d->rawFont.boundingRect(d->glyphIndexes.at(i));
glyphRect.translate(d->glyphPositions.at(i));
if (i == 0) {
minX = glyphRect.left();
minY = glyphRect.top();
maxX = glyphRect.right();
maxY = glyphRect.bottom();
} else {
minX = qMin(glyphRect.left(), minX);
minY = qMin(glyphRect.top(), minY);
maxX = qMax(glyphRect.right(),maxX);
maxY = qMax(glyphRect.bottom(), maxY);
}
}
return QRectF(QPointF(minX, minY), QPointF(maxX, maxY));
}
QT_END_NAMESPACE
#endif // QT_NO_RAWFONT

2
src/gui/text/qglyphrun.h
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@ -87,6 +87,8 @@ public:
void setStrikeOut(bool strikeOut);
bool strikeOut() const;
QRectF boundingRect() const;
private:
friend class QGlyphRunPrivate;
friend class QTextLine;

14
src/gui/text/qrawfont.cpp
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@ -718,6 +718,20 @@ void QRawFontPrivate::cleanUp()
hintingPreference = QFont::PreferDefaultHinting;
}
/*!
Returns the smallest rectangle containing the glyph with the given \a glyphIndex.
\since 5.0
*/
QRectF QRawFont::boundingRect(quint32 glyphIndex) const
{
if (!isValid())
return QRectF();
glyph_metrics_t gm = d->fontEngine->boundingBox(glyphIndex);
return QRectF(gm.x.toReal(), gm.y.toReal(), gm.width.toReal(), gm.height.toReal());
}
#endif // QT_NO_RAWFONT
QT_END_NAMESPACE

1
src/gui/text/qrawfont.h
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@ -97,6 +97,7 @@ public:
AntialiasingType antialiasingType = SubPixelAntialiasing,
const QTransform &transform = QTransform()) const;
QPainterPath pathForGlyph(quint32 glyphIndex) const;
QRectF boundingRect(quint32 glyphIndex) const;
void setPixelSize(qreal pixelSize);
qreal pixelSize() const;

86
src/gui/text/qtextlayout.cpp
View File

@ -997,11 +997,20 @@ static inline QRectF clipIfValid(const QRectF &rect, const QRectF &clip)
\sa draw(), QPainter::drawGlyphRun()
*/
#if !defined(QT_NO_RAWFONT)
QList<QGlyphRun> QTextLayout::glyphRuns() const
{
QList<QGlyphRun> QTextLayout::glyphRuns(int from, int length) const
{
if (from < 0)
from = 0;
if (length < 0)
length = text().length();
QList<QGlyphRun> glyphs;
for (int i=0; i<d->lines.size(); ++i)
glyphs += QTextLine(i, d).glyphs(-1, -1);
for (int i=0; i<d->lines.size(); ++i) {
if (d->lines[i].from > from + length)
break;
else if (d->lines[i].from + d->lines[i].length >= from)
glyphs += QTextLine(i, d).glyphRuns(from, length);
}
return glyphs;
}
@ -2084,25 +2093,32 @@ namespace {
}
/*!
\internal
Returns the glyph indexes and positions for all glyphs in this QTextLine for characters
in the range defined by \a from and \a length. The \a from index is relative to the beginning
of the text in the containing QTextLayout, and the range must be within the range of QTextLine
as given by functions textStart() and textLength().
Returns the glyph indexes and positions for all glyphs in this QTextLine which reside in
QScriptItems that overlap with the range defined by \a from and \a length. The arguments
specify characters, relative to the text in the layout. Note that it is not possible to
use this function to retrieve a subset of the glyphs in a QScriptItem.
If \a from is negative, it will default to textStart(), and if \a length is negative it will
default to the return value of textLength().
\since 4.8
\since 5.0
\sa QTextLayout::glyphRuns()
*/
#if !defined(QT_NO_RAWFONT)
QList<QGlyphRun> QTextLine::glyphs(int from, int length) const
QList<QGlyphRun> QTextLine::glyphRuns(int from, int length) const
{
const QScriptLine &line = eng->lines[i];
if (line.length == 0)
return QList<QGlyphRun>();
if (from < 0)
from = textStart();
if (length < 0)
length = textLength();
QHash<QFontEngine *, GlyphInfo> glyphLayoutHash;
QTextLineItemIterator iterator(eng, i);
@ -2114,8 +2130,9 @@ QList<QGlyphRun> QTextLine::glyphs(int from, int length) const
QPointF pos(iterator.x.toReal(), y);
if (from >= 0 && length >= 0 &&
(from >= si.position + eng->length(&si) || from + length <= si.position))
(from >= si.position + eng->length(&si) || from + length <= si.position)) {
continue;
}
QFont font = eng->font(si);
@ -2126,11 +2143,42 @@ QList<QGlyphRun> QTextLine::glyphs(int from, int length) const
flags |= QTextItem::Underline;
if (font.strikeOut())
flags |= QTextItem::StrikeOut;
if (si.analysis.bidiLevel % 2)
flags |= QTextItem::RightToLeft;
QGlyphLayout glyphLayout = eng->shapedGlyphs(&si).mid(iterator.glyphsStart,
iterator.glyphsEnd - iterator.glyphsStart);
bool rtl = false;
if (si.analysis.bidiLevel % 2) {
flags |= QTextItem::RightToLeft;
rtl = true;
}
int relativeFrom = qMax(iterator.itemStart, from) - si.position;
int relativeTo = qMin(iterator.itemEnd, from + length - 1) - si.position;
unsigned short *logClusters = eng->logClusters(&si);
int glyphsStart = logClusters[relativeFrom];
int glyphsEnd = (relativeTo == eng->length(&si))
? si.num_glyphs - 1
: logClusters[relativeTo];
QGlyphLayout glyphLayout = eng->shapedGlyphs(&si);
// Calculate new x position of glyph layout for a subset. This becomes somewhat complex
// when we're breaking a RTL script item, since the expected position passed into
// getGlyphPositions() is the left-most edge of the left-most glyph in an RTL run.
if (relativeFrom != (iterator.itemStart - si.position) && !rtl) {
for (int i=0; i<glyphsStart; ++i) {
QFixed justification = QFixed::fromFixed(glyphLayout.justifications[i].space_18d6);
pos += QPointF((glyphLayout.advances_x[i] + justification).toReal(),
glyphLayout.advances_y[i].toReal());
}
} else if (relativeTo != (iterator.itemEnd - si.position) && rtl) {
for (int i=glyphLayout.numGlyphs - 1; i>glyphsEnd; --i) {
QFixed justification = QFixed::fromFixed(glyphLayout.justifications[i].space_18d6);
pos += QPointF((glyphLayout.advances_x[i] + justification).toReal(),
glyphLayout.advances_y[i].toReal());
}
}
glyphLayout = glyphLayout.mid(glyphsStart, glyphsEnd - glyphsStart + 1);
if (glyphLayout.numGlyphs > 0) {
QFontEngine *mainFontEngine = font.d->engineForScript(si.analysis.script);
@ -2147,9 +2195,10 @@ QList<QGlyphRun> QTextLine::glyphs(int from, int length) const
QGlyphLayout subLayout = glyphLayout.mid(start, end - start);
glyphLayoutHash.insertMulti(multiFontEngine->engine(which),
GlyphInfo(subLayout, pos, flags));
for (int i = 0; i < subLayout.numGlyphs; i++)
for (int i = 0; i < subLayout.numGlyphs; i++) {
pos += QPointF(subLayout.advances_x[i].toReal(),
subLayout.advances_y[i].toReal());
}
start = end;
which = e;
@ -2501,8 +2550,9 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
pos = 0;
int glyph_pos = pos == l ? si->num_glyphs : logClusters[pos];
if (edge == Trailing) {
if (edge == Trailing && glyph_pos < si->num_glyphs) {
// trailing edge is leading edge of next cluster
glyph_pos++;
while (glyph_pos < si->num_glyphs && !glyphs.attributes[glyph_pos].clusterStart)
glyph_pos++;
}

10
src/gui/text/qtextlayout.h
View File

@ -174,7 +174,7 @@ public:
qreal maximumWidth() const;
#if !defined(QT_NO_RAWFONT)
QList<QGlyphRun> glyphRuns() const;
QList<QGlyphRun> glyphRuns(int from = -1, int length = -1) const;
#endif
QTextEngine *engine() const { return d; }
@ -244,14 +244,14 @@ public:
void draw(QPainter *p, const QPointF &point, const QTextLayout::FormatRange *selection = 0) const;
#if !defined(QT_NO_RAWFONT)
QList<QGlyphRun> glyphRuns(int from = -1, int length = -1) const;
#endif
private:
QTextLine(int line, QTextEngine *e) : i(line), eng(e) {}
void layout_helper(int numGlyphs);
#if !defined(QT_NO_RAWFONT)
QList<QGlyphRun> glyphs(int from, int length) const;
#endif
friend class QTextLayout;
friend class QTextFragment;
int i;

2
src/gui/text/qtextobject.cpp
View File

@ -1685,7 +1685,7 @@ QList<QGlyphRun> QTextFragment::glyphRuns() const
QList<QGlyphRun> ret;
for (int i=0; i<layout->lineCount(); ++i) {
QTextLine textLine = layout->lineAt(i);
ret += textLine.glyphs(pos, len);
ret += textLine.glyphRuns(pos, len);
}
return ret;

7
src/gui/widgets/qlinecontrol_p.h
View File

@ -302,6 +302,8 @@ public:
void setCursorBlinkPeriod(int msec);
void resetCursorBlinkTimer();
bool cursorBlinkStatus() const { return m_blinkStatus; }
QString cancelText() const { return m_cancelText; }
void setCancelText(const QString &text) { m_cancelText = text; }
@ -318,6 +320,11 @@ public:
bool processEvent(QEvent *ev);
QTextLayout *textLayout()
{
return &m_textLayout;
}
private:
void init(const QString &txt);
void removeSelectedText();