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authorEskil Abrahamsen Blomfeldt <eblomfel@trolltech.com>2011-04-23 09:35:30 (GMT)
committerEskil Abrahamsen Blomfeldt <eblomfel@trolltech.com>2011-04-23 09:35:30 (GMT)
commit28c7e17d9eeb8264ad9e26a5b93e5ff744add9a6 (patch)
tree6ae5d35d88c2d5675015e38bf802176a1bcff6e0 /src/gui/text
parent6c121991f85164d257208b14845c7ff913a687f4 (diff)
parentd805cf6f5fe4961093a0698ae6df18400536d2e0 (diff)
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Merge branch 'master' of scm.dev.troll.no:qt/qt-fire-review
Conflicts: src/gui/text/qglyphs.cpp
Diffstat (limited to 'src/gui/text')
-rw-r--r--src/gui/text/qglyphs.cpp6
-rw-r--r--src/gui/text/qtextcursor.cpp42
-rw-r--r--src/gui/text/qtextcursor.h4
-rw-r--r--src/gui/text/qtextdocument.cpp23
-rw-r--r--src/gui/text/qtextdocument.h5
-rw-r--r--src/gui/text/qtextdocument_p.cpp15
-rw-r--r--src/gui/text/qtextdocument_p.h4
-rw-r--r--src/gui/text/qtextengine.cpp331
-rw-r--r--src/gui/text/qtextengine_p.h60
-rw-r--r--src/gui/text/qtextlayout.cpp394
-rw-r--r--src/gui/text/qtextlayout.h6
-rw-r--r--src/gui/text/text.pri3
12 files changed, 623 insertions, 270 deletions
diff --git a/src/gui/text/qglyphs.cpp b/src/gui/text/qglyphs.cpp
index b8a418d..cfea6ec 100644
--- a/src/gui/text/qglyphs.cpp
+++ b/src/gui/text/qglyphs.cpp
@@ -50,7 +50,7 @@ QT_BEGIN_NAMESPACE
/*!
\class QGlyphs
- \brief the QGlyphs class provides direct access to the internal glyphs in a font
+ \brief The QGlyphs class provides direct access to the internal glyphs in a font.
\since 4.8
\ingroup text
@@ -76,8 +76,8 @@ QT_BEGIN_NAMESPACE
QTextLayout::glyphs() or QTextFragment::glyphs() can be used to convert unicode encoded text
into a list of QGlyphs objects, and QPainter::drawGlyphs() can be used to draw the glyphs.
- \note Please note that QRawFont is considered local to the thread in which it is constructed,
- which in turn means that a new QRawFont will have to be created and set on the QGlyphs if it is
+ \note Please note that QRawFont is considered local to the thread in which it is constructed.
+ This in turn means that a new QRawFont will have to be created and set on the QGlyphs if it is
moved to a different thread. If the QGlyphs contains a reference to a QRawFont from a different
thread than the current, it will not be possible to draw the glyphs using a QPainter, as the
QRawFont is considered invalid and inaccessible in this case.
diff --git a/src/gui/text/qtextcursor.cpp b/src/gui/text/qtextcursor.cpp
index 6ddfdb0..4f6857a 100644
--- a/src/gui/text/qtextcursor.cpp
+++ b/src/gui/text/qtextcursor.cpp
@@ -362,20 +362,23 @@ bool QTextCursorPrivate::movePosition(QTextCursor::MoveOperation op, QTextCursor
currentCharFormat = -1;
bool adjustX = true;
QTextBlock blockIt = block();
+ bool visualMovement = priv->defaultCursorMoveStyle == QTextCursor::Visual;
if (!blockIt.isValid())
return false;
- if (op >= QTextCursor::Left && op <= QTextCursor::WordRight
- && blockIt.textDirection() == Qt::RightToLeft) {
- if (op == QTextCursor::Left)
- op = QTextCursor::NextCharacter;
- else if (op == QTextCursor::Right)
- op = QTextCursor::PreviousCharacter;
- else if (op == QTextCursor::WordLeft)
+ if (blockIt.textDirection() == Qt::RightToLeft) {
+ if (op == QTextCursor::WordLeft)
op = QTextCursor::NextWord;
else if (op == QTextCursor::WordRight)
op = QTextCursor::PreviousWord;
+
+ if (!visualMovement) {
+ if (op == QTextCursor::Left)
+ op = QTextCursor::NextCharacter;
+ else if (op == QTextCursor::Right)
+ op = QTextCursor::PreviousCharacter;
+ }
}
const QTextLayout *layout = blockLayout(blockIt);
@@ -418,9 +421,12 @@ bool QTextCursorPrivate::movePosition(QTextCursor::MoveOperation op, QTextCursor
break;
}
case QTextCursor::PreviousCharacter:
- case QTextCursor::Left:
newPosition = priv->previousCursorPosition(position, QTextLayout::SkipCharacters);
break;
+ case QTextCursor::Left:
+ newPosition = visualMovement ? priv->leftCursorPosition(position)
+ : priv->previousCursorPosition(position, QTextLayout::SkipCharacters);
+ break;
case QTextCursor::StartOfWord: {
if (relativePos == 0)
break;
@@ -529,9 +535,12 @@ bool QTextCursorPrivate::movePosition(QTextCursor::MoveOperation op, QTextCursor
break;
}
case QTextCursor::NextCharacter:
- case QTextCursor::Right:
newPosition = priv->nextCursorPosition(position, QTextLayout::SkipCharacters);
break;
+ case QTextCursor::Right:
+ newPosition = visualMovement ? priv->rightCursorPosition(position)
+ : priv->nextCursorPosition(position, QTextLayout::SkipCharacters);
+ break;
case QTextCursor::NextWord:
case QTextCursor::WordRight:
newPosition = priv->nextCursorPosition(position, QTextLayout::SkipWords);
@@ -2558,4 +2567,19 @@ QTextDocument *QTextCursor::document() const
return 0; // document went away
}
+/*!
+ \enum QTextCursor::MoveStyle
+
+ This enum describes the movement style available to QTextCursor. The options
+ are:
+
+ \value Logical Within a left-to-right text block, increase cursor position
+ when pressing left arrow key, decrease cursor position when pressing the
+ right arrow key. If the text block is right-to-left, the opposite behavior
+ applies.
+ \value Visual Pressing the left arrow key will always cause the cursor to move
+ left, regardless of the text's writing direction. The same behavior applies to
+ right arrow key.
+*/
+
QT_END_NAMESPACE
diff --git a/src/gui/text/qtextcursor.h b/src/gui/text/qtextcursor.h
index 4eaeb41..9e4c0b8 100644
--- a/src/gui/text/qtextcursor.h
+++ b/src/gui/text/qtextcursor.h
@@ -86,6 +86,10 @@ public:
MoveAnchor,
KeepAnchor
};
+ enum MoveStyle {
+ Logical,
+ Visual
+ };
void setPosition(int pos, MoveMode mode = MoveAnchor);
int position() const;
diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index 6dbd755..36f3c6c 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -586,6 +586,29 @@ void QTextDocument::setDefaultTextOption(const QTextOption &option)
}
/*!
+ \since 4.8
+
+ The default cursor movement style is used by all QTextCursor objects
+ created from the document. The default is QTextCursor::Logical.
+*/
+QTextCursor::MoveStyle QTextDocument::defaultCursorMoveStyle() const
+{
+ Q_D(const QTextDocument);
+ return d->defaultCursorMoveStyle;
+}
+
+/*!
+ \since 4.8
+
+ Set the default cursor movement style.
+*/
+void QTextDocument::setDefaultCursorMoveStyle(QTextCursor::MoveStyle style)
+{
+ Q_D(QTextDocument);
+ d->defaultCursorMoveStyle = style;
+}
+
+/*!
\fn void QTextDocument::markContentsDirty(int position, int length)
Marks the contents specified by the given \a position and \a length
diff --git a/src/gui/text/qtextdocument.h b/src/gui/text/qtextdocument.h
index f87ccc9..e515b36 100644
--- a/src/gui/text/qtextdocument.h
+++ b/src/gui/text/qtextdocument.h
@@ -46,6 +46,7 @@
#include <QtCore/qsize.h>
#include <QtCore/qrect.h>
#include <QtGui/qfont.h>
+#include <QtGui/qtextcursor.h>
QT_BEGIN_HEADER
@@ -60,7 +61,6 @@ class QPainter;
class QPrinter;
class QAbstractTextDocumentLayout;
class QPoint;
-class QTextCursor;
class QTextObject;
class QTextFormat;
class QTextFrame;
@@ -269,6 +269,9 @@ public:
QTextOption defaultTextOption() const;
void setDefaultTextOption(const QTextOption &option);
+ QTextCursor::MoveStyle defaultCursorMoveStyle() const;
+ void setDefaultCursorMoveStyle(QTextCursor::MoveStyle style);
+
Q_SIGNALS:
void contentsChange(int from, int charsRemoves, int charsAdded);
void contentsChanged();
diff --git a/src/gui/text/qtextdocument_p.cpp b/src/gui/text/qtextdocument_p.cpp
index 2172f74..71af89f 100644
--- a/src/gui/text/qtextdocument_p.cpp
+++ b/src/gui/text/qtextdocument_p.cpp
@@ -209,6 +209,7 @@ QTextDocumentPrivate::QTextDocumentPrivate()
defaultTextOption.setTabStop(80); // same as in qtextengine.cpp
defaultTextOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+ defaultCursorMoveStyle = QTextCursor::Logical;
indentWidth = 40;
documentMargin = 4;
@@ -1382,6 +1383,20 @@ int QTextDocumentPrivate::previousCursorPosition(int position, QTextLayout::Curs
return it.layout()->previousCursorPosition(position-start, mode) + start;
}
+int QTextDocumentPrivate::leftCursorPosition(int position) const
+{
+ QTextBlock it = blocksFind(position);
+ int start = it.position();
+ return it.layout()->leftCursorPosition(position-start) + start;
+}
+
+int QTextDocumentPrivate::rightCursorPosition(int position) const
+{
+ QTextBlock it = blocksFind(position);
+ int start = it.position();
+ return it.layout()->rightCursorPosition(position-start) + start;
+}
+
void QTextDocumentPrivate::changeObjectFormat(QTextObject *obj, int format)
{
beginEditBlock();
diff --git a/src/gui/text/qtextdocument_p.h b/src/gui/text/qtextdocument_p.h
index b464f2e..6563920 100644
--- a/src/gui/text/qtextdocument_p.h
+++ b/src/gui/text/qtextdocument_p.h
@@ -64,6 +64,7 @@
#include "private/qtextformat_p.h"
#include "QtGui/qtextdocument.h"
#include "QtGui/qtextobject.h"
+#include "QtGui/qtextcursor.h"
#include "QtCore/qmap.h"
#include "QtCore/qvariant.h"
#include "QtCore/qurl.h"
@@ -244,6 +245,8 @@ public:
int nextCursorPosition(int position, QTextLayout::CursorMode mode) const;
int previousCursorPosition(int position, QTextLayout::CursorMode mode) const;
+ int leftCursorPosition(int position) const;
+ int rightCursorPosition(int position) const;
void changeObjectFormat(QTextObject *group, int format);
@@ -339,6 +342,7 @@ private:
public:
QTextOption defaultTextOption;
+ QTextCursor::MoveStyle defaultCursorMoveStyle;
#ifndef QT_NO_CSSPARSER
QCss::StyleSheet parsedDefaultStyleSheet;
#endif
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 08d0eca..dab4bb7 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -856,6 +856,21 @@ void QTextEngine::shapeLine(const QScriptLine &line)
}
}
+#if !defined(QT_ENABLE_HARFBUZZ_FOR_MAC)
+static bool enableHarfBuzz()
+{
+ static enum { Yes, No, Unknown } status = Unknown;
+
+ if (status == Unknown) {
+ QByteArray v = qgetenv("QT_ENABLE_HARFBUZZ");
+ bool value = !v.isEmpty() && v != "0" && v != "false";
+ if (value) status = Yes;
+ else status = No;
+ }
+ return status == Yes;
+}
+#endif
+
void QTextEngine::shapeText(int item) const
{
Q_ASSERT(item < layoutData->items.size());
@@ -865,7 +880,24 @@ void QTextEngine::shapeText(int item) const
return;
#if defined(Q_WS_MAC)
- shapeTextMac(item);
+#if !defined(QT_ENABLE_HARFBUZZ_FOR_MAC)
+ if (enableHarfBuzz()) {
+#endif
+ QFontEngine *actualFontEngine = fontEngine(si, &si.ascent, &si.descent, &si.leading);
+ if (actualFontEngine->type() == QFontEngine::Multi)
+ actualFontEngine = static_cast<QFontEngineMulti *>(actualFontEngine)->engine(0);
+
+ HB_Face face = actualFontEngine->harfbuzzFace();
+ HB_Script script = (HB_Script) si.analysis.script;
+ if (face->supported_scripts[script])
+ shapeTextWithHarfbuzz(item);
+ else
+ shapeTextMac(item);
+#if !defined(QT_ENABLE_HARFBUZZ_FOR_MAC)
+ } else {
+ shapeTextMac(item);
+ }
+#endif
#elif defined(Q_WS_WINCE)
shapeTextWithCE(item);
#else
@@ -1304,6 +1336,7 @@ static void init(QTextEngine *e)
e->ignoreBidi = false;
e->cacheGlyphs = false;
e->forceJustification = false;
+ e->visualMovement = false;
e->layoutData = 0;
@@ -2737,6 +2770,180 @@ QFixed QTextEngine::leadingSpaceWidth(const QScriptLine &line)
return width(line.from + pos, line.length - pos);
}
+QFixed QTextEngine::alignLine(const QScriptLine &line)
+{
+ QFixed x = 0;
+ justify(line);
+ // if width is QFIXED_MAX that means we used setNumColumns() and that implicitly makes this line left aligned.
+ if (!line.justified && line.width != QFIXED_MAX) {
+ int align = option.alignment();
+ if (align & Qt::AlignJustify && isRightToLeft())
+ align = Qt::AlignRight;
+ if (align & Qt::AlignRight)
+ x = line.width - (line.textAdvance + leadingSpaceWidth(line));
+ else if (align & Qt::AlignHCenter)
+ x = (line.width - line.textAdvance)/2;
+ }
+ return x;
+}
+
+QFixed QTextEngine::offsetInLigature(const QScriptItem *si, int pos, int max, int glyph_pos)
+{
+ unsigned short *logClusters = this->logClusters(si);
+ const QGlyphLayout &glyphs = shapedGlyphs(si);
+
+ int offsetInCluster = 0;
+ for (int i = pos - 1; i >= 0; i--) {
+ if (logClusters[i] == glyph_pos)
+ offsetInCluster++;
+ else
+ break;
+ }
+
+ // in the case that the offset is inside a (multi-character) glyph,
+ // interpolate the position.
+ if (offsetInCluster > 0) {
+ int clusterLength = 0;
+ for (int i = pos - offsetInCluster; i < max; i++) {
+ if (logClusters[i] == glyph_pos)
+ clusterLength++;
+ else
+ break;
+ }
+ if (clusterLength)
+ return glyphs.advances_x[glyph_pos] * offsetInCluster / clusterLength;
+ }
+
+ return 0;
+}
+
+int QTextEngine::previousLogicalPosition(int oldPos) const
+{
+ const HB_CharAttributes *attrs = attributes();
+ if (!attrs || oldPos < 0)
+ return oldPos;
+
+ if (oldPos <= 0)
+ return 0;
+ oldPos--;
+ while (oldPos && !attrs[oldPos].charStop)
+ oldPos--;
+ return oldPos;
+}
+
+int QTextEngine::nextLogicalPosition(int oldPos) const
+{
+ const HB_CharAttributes *attrs = attributes();
+ int len = block.isValid() ? block.length() - 1
+ : layoutData->string.length();
+ Q_ASSERT(len <= layoutData->string.length());
+ if (!attrs || oldPos < 0 || oldPos >= len)
+ return oldPos;
+
+ oldPos++;
+ while (oldPos < len && !attrs[oldPos].charStop)
+ oldPos++;
+ return oldPos;
+}
+
+int QTextEngine::lineNumberForTextPosition(int pos)
+{
+ if (!layoutData)
+ itemize();
+ if (pos == layoutData->string.length() && lines.size())
+ return lines.size() - 1;
+ for (int i = 0; i < lines.size(); ++i) {
+ const QScriptLine& line = lines[i];
+ if (line.from + line.length > pos)
+ return i;
+ }
+ return -1;
+}
+
+void QTextEngine::insertionPointsForLine(int lineNum, QVector<int> &insertionPoints)
+{
+ QTextLineItemIterator iterator(this, lineNum);
+ bool rtl = isRightToLeft();
+ bool lastLine = lineNum >= lines.size() - 1;
+
+ while (!iterator.atEnd()) {
+ iterator.next();
+ const QScriptItem *si = &layoutData->items[iterator.item];
+ if (si->analysis.bidiLevel % 2) {
+ int i = iterator.itemEnd - 1, min = iterator.itemStart;
+ if (lastLine && (rtl ? iterator.atBeginning() : iterator.atEnd()))
+ i++;
+ for (; i >= min; i--)
+ insertionPoints.push_back(i);
+ } else {
+ int i = iterator.itemStart, max = iterator.itemEnd;
+ if (lastLine && (rtl ? iterator.atBeginning() : iterator.atEnd()))
+ max++;
+ for (; i < max; i++)
+ insertionPoints.push_back(i);
+ }
+ }
+}
+
+int QTextEngine::endOfLine(int lineNum)
+{
+ QVector<int> insertionPoints;
+ insertionPointsForLine(lineNum, insertionPoints);
+
+ if (insertionPoints.size() > 0)
+ return insertionPoints.last();
+ return 0;
+}
+
+int QTextEngine::beginningOfLine(int lineNum)
+{
+ QVector<int> insertionPoints;
+ insertionPointsForLine(lineNum, insertionPoints);
+
+ if (insertionPoints.size() > 0)
+ return insertionPoints.first();
+ return 0;
+}
+
+int QTextEngine::positionAfterVisualMovement(int pos, QTextCursor::MoveOperation op)
+{
+ if (!layoutData)
+ itemize();
+
+ bool moveRight = (op == QTextCursor::Right);
+ bool alignRight = isRightToLeft();
+ if (!layoutData->hasBidi)
+ return moveRight ^ alignRight ? nextLogicalPosition(pos) : previousLogicalPosition(pos);
+
+ int lineNum = lineNumberForTextPosition(pos);
+ Q_ASSERT(lineNum >= 0);
+
+ QVector<int> insertionPoints;
+ insertionPointsForLine(lineNum, insertionPoints);
+ int i, max = insertionPoints.size();
+ for (i = 0; i < max; i++)
+ if (pos == insertionPoints[i]) {
+ if (moveRight) {
+ if (i + 1 < max)
+ return insertionPoints[i + 1];
+ } else {
+ if (i > 0)
+ return insertionPoints[i - 1];
+ }
+
+ if (moveRight ^ alignRight) {
+ if (lineNum + 1 < lines.size())
+ return alignRight ? endOfLine(lineNum + 1) : beginningOfLine(lineNum + 1);
+ }
+ else {
+ if (lineNum > 0)
+ return alignRight ? beginningOfLine(lineNum - 1) : endOfLine(lineNum - 1);
+ }
+ }
+
+ return pos;
+}
+
QStackTextEngine::QStackTextEngine(const QString &string, const QFont &f)
: QTextEngine(string, f),
_layoutData(string, _memory, MemSize)
@@ -2841,5 +3048,127 @@ glyph_metrics_t glyph_metrics_t::transformed(const QTransform &matrix) const
return m;
}
+QTextLineItemIterator::QTextLineItemIterator(QTextEngine *_eng, int _lineNum, const QPointF &pos,
+ const QTextLayout::FormatRange *_selection)
+ : eng(_eng),
+ line(eng->lines[_lineNum]),
+ si(0),
+ lineNum(_lineNum),
+ lineEnd(line.from + line.length),
+ firstItem(eng->findItem(line.from)),
+ lastItem(eng->findItem(lineEnd - 1)),
+ nItems((firstItem >= 0 && lastItem >= firstItem)? (lastItem-firstItem+1) : 0),
+ logicalItem(-1),
+ item(-1),
+ visualOrder(nItems),
+ levels(nItems),
+ selection(_selection)
+{
+ pos_x = x = QFixed::fromReal(pos.x());
+
+ x += line.x;
+
+ x += eng->alignLine(line);
+
+ for (int i = 0; i < nItems; ++i)
+ levels[i] = eng->layoutData->items[i+firstItem].analysis.bidiLevel;
+ QTextEngine::bidiReorder(nItems, levels.data(), visualOrder.data());
+
+ eng->shapeLine(line);
+}
+
+QScriptItem &QTextLineItemIterator::next()
+{
+ x += itemWidth;
+
+ ++logicalItem;
+ item = visualOrder[logicalItem] + firstItem;
+ itemLength = eng->length(item);
+ si = &eng->layoutData->items[item];
+ if (!si->num_glyphs)
+ eng->shape(item);
+
+ if (si->analysis.flags >= QScriptAnalysis::TabOrObject) {
+ itemWidth = si->width;
+ return *si;
+ }
+
+ unsigned short *logClusters = eng->logClusters(si);
+ QGlyphLayout glyphs = eng->shapedGlyphs(si);
+
+ itemStart = qMax(line.from, si->position);
+ glyphsStart = logClusters[itemStart - si->position];
+ if (lineEnd < si->position + itemLength) {
+ itemEnd = lineEnd;
+ glyphsEnd = logClusters[itemEnd-si->position];
+ } else {
+ itemEnd = si->position + itemLength;
+ glyphsEnd = si->num_glyphs;
+ }
+ // show soft-hyphen at line-break
+ if (si->position + itemLength >= lineEnd
+ && eng->layoutData->string.at(lineEnd - 1) == 0x00ad)
+ glyphs.attributes[glyphsEnd - 1].dontPrint = false;
+
+ itemWidth = 0;
+ for (int g = glyphsStart; g < glyphsEnd; ++g)
+ itemWidth += glyphs.effectiveAdvance(g);
+
+ return *si;
+}
+
+bool QTextLineItemIterator::getSelectionBounds(QFixed *selectionX, QFixed *selectionWidth) const
+{
+ *selectionX = *selectionWidth = 0;
+
+ if (!selection)
+ return false;
+
+ if (si->analysis.flags >= QScriptAnalysis::TabOrObject) {
+ if (si->position >= selection->start + selection->length
+ || si->position + itemLength <= selection->start)
+ return false;
+
+ *selectionX = x;
+ *selectionWidth = itemWidth;
+ } else {
+ unsigned short *logClusters = eng->logClusters(si);
+ QGlyphLayout glyphs = eng->shapedGlyphs(si);
+
+ int from = qMax(itemStart, selection->start) - si->position;
+ int to = qMin(itemEnd, selection->start + selection->length) - si->position;
+ if (from >= to)
+ return false;
+
+ int start_glyph = logClusters[from];
+ int end_glyph = (to == eng->length(item)) ? si->num_glyphs : logClusters[to];
+ QFixed soff;
+ QFixed swidth;
+ if (si->analysis.bidiLevel %2) {
+ for (int g = glyphsEnd - 1; g >= end_glyph; --g)
+ soff += glyphs.effectiveAdvance(g);
+ for (int g = end_glyph - 1; g >= start_glyph; --g)
+ swidth += glyphs.effectiveAdvance(g);
+ } else {
+ for (int g = glyphsStart; g < start_glyph; ++g)
+ soff += glyphs.effectiveAdvance(g);
+ for (int g = start_glyph; g < end_glyph; ++g)
+ swidth += glyphs.effectiveAdvance(g);
+ }
+
+ // If the starting character is in the middle of a ligature,
+ // selection should only contain the right part of that ligature
+ // glyph, so we need to get the width of the left part here and
+ // add it to *selectionX
+ QFixed leftOffsetInLigature = eng->offsetInLigature(si, from, to, start_glyph);
+ *selectionX = x + soff + leftOffsetInLigature;
+ *selectionWidth = swidth - leftOffsetInLigature;
+ // If the ending character is also part of a ligature, swidth does
+ // not contain that part yet, we also need to find out the width of
+ // that left part
+ *selectionWidth += eng->offsetInLigature(si, to, eng->length(item), end_glyph);
+ }
+ return true;
+}
QT_END_NAMESPACE
diff --git a/src/gui/text/qtextengine_p.h b/src/gui/text/qtextengine_p.h
index 366c5c3..c476485 100644
--- a/src/gui/text/qtextengine_p.h
+++ b/src/gui/text/qtextengine_p.h
@@ -64,6 +64,7 @@
#include "QtGui/qpaintengine.h"
#include "QtGui/qtextobject.h"
#include "QtGui/qtextoption.h"
+#include "QtGui/qtextcursor.h"
#include "QtCore/qset.h"
#include "QtCore/qdebug.h"
#ifndef QT_BUILD_COMPAT_LIB
@@ -471,6 +472,7 @@ public:
void shape(int item) const;
void justify(const QScriptLine &si);
+ QFixed alignLine(const QScriptLine &line);
QFixed width(int charFrom, int numChars) const;
glyph_metrics_t boundingBox(int from, int len) const;
@@ -586,12 +588,18 @@ public:
uint cacheGlyphs : 1;
uint stackEngine : 1;
uint forceJustification : 1;
+ uint visualMovement : 1;
int *underlinePositions;
mutable LayoutData *layoutData;
inline bool hasFormats() const { return (block.docHandle() || specialData); }
+ inline bool visualCursorMovement() const
+ {
+ return (visualMovement ||
+ (block.docHandle() ? block.docHandle()->defaultCursorMoveStyle == QTextCursor::Visual : false));
+ }
struct SpecialData {
int preeditPosition;
@@ -611,6 +619,13 @@ public:
void shapeLine(const QScriptLine &line);
QFixed leadingSpaceWidth(const QScriptLine &line);
+ QFixed offsetInLigature(const QScriptItem *si, int pos, int max, int glyph_pos);
+ int previousLogicalPosition(int oldPos) const;
+ int nextLogicalPosition(int oldPos) const;
+ int lineNumberForTextPosition(int pos);
+ int positionAfterVisualMovement(int oldPos, QTextCursor::MoveOperation op);
+ void insertionPointsForLine(int lineNum, QVector<int> &insertionPoints);
+
private:
void setBoundary(int strPos) const;
void addRequiredBoundaries() const;
@@ -625,6 +640,8 @@ private:
void splitItem(int item, int pos) const;
void resolveAdditionalFormats() const;
+ int endOfLine(int lineNum);
+ int beginningOfLine(int lineNum);
};
class QStackTextEngine : public QTextEngine {
@@ -635,6 +652,49 @@ public:
void *_memory[MemSize];
};
+struct QTextLineItemIterator
+{
+ QTextLineItemIterator(QTextEngine *eng, int lineNum, const QPointF &pos = QPointF(),
+ const QTextLayout::FormatRange *_selection = 0);
+
+ inline bool atEnd() const { return logicalItem >= nItems - 1; }
+ inline bool atBeginning() const { return logicalItem <= 0; }
+ QScriptItem &next();
+
+ bool getSelectionBounds(QFixed *selectionX, QFixed *selectionWidth) const;
+ inline bool isOutsideSelection() const {
+ QFixed tmp1, tmp2;
+ return !getSelectionBounds(&tmp1, &tmp2);
+ }
+
+ QTextEngine *eng;
+
+ QFixed x;
+ QFixed pos_x;
+ const QScriptLine &line;
+ QScriptItem *si;
+
+ int lineNum;
+ int lineEnd;
+ int firstItem;
+ int lastItem;
+ int nItems;
+ int logicalItem;
+ int item;
+ int itemLength;
+
+ int glyphsStart;
+ int glyphsEnd;
+ int itemStart;
+ int itemEnd;
+
+ QFixed itemWidth;
+
+ QVarLengthArray<int> visualOrder;
+ QVarLengthArray<uchar> levels;
+
+ const QTextLayout::FormatRange *selection;
+};
Q_DECLARE_OPERATORS_FOR_FLAGS(QTextEngine::ShaperFlags)
diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
index 93f71d3..bd224c6 100644
--- a/src/gui/text/qtextlayout.cpp
+++ b/src/gui/text/qtextlayout.cpp
@@ -72,23 +72,6 @@ QT_BEGIN_NAMESPACE
#define SuppressText 0x5012
#define SuppressBackground 0x513
-static QFixed alignLine(QTextEngine *eng, const QScriptLine &line)
-{
- QFixed x = 0;
- eng->justify(line);
- // if width is QFIXED_MAX that means we used setNumColumns() and that implicitly makes this line left aligned.
- if (!line.justified && line.width != QFIXED_MAX) {
- int align = eng->option.alignment();
- if (align & Qt::AlignJustify && eng->isRightToLeft())
- align = Qt::AlignRight;
- if (align & Qt::AlignRight)
- x = line.width - (line.textAdvance + eng->leadingSpaceWidth(line));
- else if (align & Qt::AlignHCenter)
- x = (line.width - line.textAdvance)/2;
- }
- return x;
-}
-
/*!
\class QTextLayout::FormatRange
\reentrant
@@ -596,6 +579,30 @@ bool QTextLayout::cacheEnabled() const
}
/*!
+ Set the visual cursor movement style. If the QTextLayout is backed by
+ a document, you can ignore this and use the option in QTextDocument,
+ this option is for widgets like QLineEdit or custom widgets without
+ a QTextDocument. Default value is QTextCursor::Logical.
+
+ \sa setCursorMoveStyle()
+*/
+void QTextLayout::setCursorMoveStyle(QTextCursor::MoveStyle style)
+{
+ d->visualMovement = style == QTextCursor::Visual ? true : false;
+}
+
+/*!
+ The cursor movement style of this QTextLayout. The default is
+ QTextCursor::Logical.
+
+ \sa setCursorMoveStyle()
+*/
+QTextCursor::MoveStyle QTextLayout::cursorMoveStyle() const
+{
+ return d->visualMovement ? QTextCursor::Visual : QTextCursor::Logical;
+}
+
+/*!
Begins the layout process.
\sa endLayout()
@@ -718,6 +725,34 @@ int QTextLayout::previousCursorPosition(int oldPos, CursorMode mode) const
}
/*!
+ Returns the cursor position to the right of \a oldPos, next to it.
+ It's dependent on the visual position of characters, after bi-directional
+ reordering.
+
+ \sa leftCursorPosition(), nextCursorPosition()
+*/
+int QTextLayout::rightCursorPosition(int oldPos) const
+{
+ int newPos = d->positionAfterVisualMovement(oldPos, QTextCursor::Right);
+// qDebug("%d -> %d", oldPos, newPos);
+ return newPos;
+}
+
+/*!
+ Returns the cursor position to the left of \a oldPos, next to it.
+ It's dependent on the visual position of characters, after bi-directional
+ reordering.
+
+ \sa rightCursorPosition(), previousCursorPosition()
+*/
+int QTextLayout::leftCursorPosition(int oldPos) const
+{
+ int newPos = d->positionAfterVisualMovement(oldPos, QTextCursor::Left);
+// qDebug("%d -> %d", oldPos, newPos);
+ return newPos;
+}
+
+/*!/
Returns true if position \a pos is a valid cursor position.
In a Unicode context some positions in the text are not valid
@@ -815,16 +850,8 @@ QTextLine QTextLayout::lineAt(int i) const
*/
QTextLine QTextLayout::lineForTextPosition(int pos) const
{
- for (int i = 0; i < d->lines.size(); ++i) {
- const QScriptLine& line = d->lines[i];
- if (line.from + (int)line.length > pos)
- return QTextLine(i, d);
- }
- if (!d->layoutData)
- d->itemize();
- if (pos == d->layoutData->string.length() && d->lines.size())
- return QTextLine(d->lines.size()-1, d);
- return QTextLine();
+ int lineNum = d->lineNumberForTextPosition(pos);
+ return lineNum >= 0 ? lineAt(lineNum) : QTextLine();
}
/*!
@@ -919,201 +946,6 @@ void QTextLayout::setFlags(int flags)
}
}
-struct QTextLineItemIterator
-{
- QTextLineItemIterator(QTextEngine *eng, int lineNum, const QPointF &pos = QPointF(),
- const QTextLayout::FormatRange *_selection = 0);
-
- inline bool atEnd() const { return logicalItem >= nItems - 1; }
- QScriptItem &next();
-
- bool getSelectionBounds(QFixed *selectionX, QFixed *selectionWidth) const;
- inline bool isOutsideSelection() const {
- QFixed tmp1, tmp2;
- return !getSelectionBounds(&tmp1, &tmp2);
- }
-
- QTextEngine *eng;
-
- QFixed x;
- QFixed pos_x;
- const QScriptLine &line;
- QScriptItem *si;
-
- int lineEnd;
- int firstItem;
- int lastItem;
- int nItems;
- int logicalItem;
- int item;
- int itemLength;
-
- int glyphsStart;
- int glyphsEnd;
- int itemStart;
- int itemEnd;
-
- QFixed itemWidth;
-
- QVarLengthArray<int> visualOrder;
- QVarLengthArray<uchar> levels;
-
- const QTextLayout::FormatRange *selection;
-};
-
-QTextLineItemIterator::QTextLineItemIterator(QTextEngine *_eng, int lineNum, const QPointF &pos,
- const QTextLayout::FormatRange *_selection)
- : eng(_eng),
- line(eng->lines[lineNum]),
- si(0),
- lineEnd(line.from + line.length),
- firstItem(eng->findItem(line.from)),
- lastItem(eng->findItem(lineEnd - 1)),
- nItems((firstItem >= 0 && lastItem >= firstItem)? (lastItem-firstItem+1) : 0),
- logicalItem(-1),
- item(-1),
- visualOrder(nItems),
- levels(nItems),
- selection(_selection)
-{
- pos_x = x = QFixed::fromReal(pos.x());
-
- x += line.x;
-
- x += alignLine(eng, line);
-
- for (int i = 0; i < nItems; ++i)
- levels[i] = eng->layoutData->items[i+firstItem].analysis.bidiLevel;
- QTextEngine::bidiReorder(nItems, levels.data(), visualOrder.data());
-
- eng->shapeLine(line);
-}
-
-QScriptItem &QTextLineItemIterator::next()
-{
- x += itemWidth;
-
- ++logicalItem;
- item = visualOrder[logicalItem] + firstItem;
- itemLength = eng->length(item);
- si = &eng->layoutData->items[item];
- if (!si->num_glyphs)
- eng->shape(item);
-
- if (si->analysis.flags >= QScriptAnalysis::TabOrObject) {
- itemWidth = si->width;
- return *si;
- }
-
- unsigned short *logClusters = eng->logClusters(si);
- QGlyphLayout glyphs = eng->shapedGlyphs(si);
-
- itemStart = qMax(line.from, si->position);
- glyphsStart = logClusters[itemStart - si->position];
- if (lineEnd < si->position + itemLength) {
- itemEnd = lineEnd;
- glyphsEnd = logClusters[itemEnd-si->position];
- } else {
- itemEnd = si->position + itemLength;
- glyphsEnd = si->num_glyphs;
- }
- // show soft-hyphen at line-break
- if (si->position + itemLength >= lineEnd
- && eng->layoutData->string.at(lineEnd - 1) == 0x00ad)
- glyphs.attributes[glyphsEnd - 1].dontPrint = false;
-
- itemWidth = 0;
- for (int g = glyphsStart; g < glyphsEnd; ++g)
- itemWidth += glyphs.effectiveAdvance(g);
-
- return *si;
-}
-
-static QFixed offsetInLigature(const unsigned short *logClusters,
- const QGlyphLayout &glyphs,
- int pos, int max, int glyph_pos)
-{
- int offsetInCluster = 0;
- for (int i = pos - 1; i >= 0; i--) {
- if (logClusters[i] == glyph_pos)
- offsetInCluster++;
- else
- break;
- }
-
- // in the case that the offset is inside a (multi-character) glyph,
- // interpolate the position.
- if (offsetInCluster > 0) {
- int clusterLength = 0;
- for (int i = pos - offsetInCluster; i < max; i++) {
- if (logClusters[i] == glyph_pos)
- clusterLength++;
- else
- break;
- }
- if (clusterLength)
- return glyphs.advances_x[glyph_pos] * offsetInCluster / clusterLength;
- }
-
- return 0;
-}
-
-bool QTextLineItemIterator::getSelectionBounds(QFixed *selectionX, QFixed *selectionWidth) const
-{
- *selectionX = *selectionWidth = 0;
-
- if (!selection)
- return false;
-
- if (si->analysis.flags >= QScriptAnalysis::TabOrObject) {
- if (si->position >= selection->start + selection->length
- || si->position + itemLength <= selection->start)
- return false;
-
- *selectionX = x;
- *selectionWidth = itemWidth;
- } else {
- unsigned short *logClusters = eng->logClusters(si);
- QGlyphLayout glyphs = eng->shapedGlyphs(si);
-
- int from = qMax(itemStart, selection->start) - si->position;
- int to = qMin(itemEnd, selection->start + selection->length) - si->position;
- if (from >= to)
- return false;
-
- int start_glyph = logClusters[from];
- int end_glyph = (to == eng->length(item)) ? si->num_glyphs : logClusters[to];
- QFixed soff;
- QFixed swidth;
- if (si->analysis.bidiLevel %2) {
- for (int g = glyphsEnd - 1; g >= end_glyph; --g)
- soff += glyphs.effectiveAdvance(g);
- for (int g = end_glyph - 1; g >= start_glyph; --g)
- swidth += glyphs.effectiveAdvance(g);
- } else {
- for (int g = glyphsStart; g < start_glyph; ++g)
- soff += glyphs.effectiveAdvance(g);
- for (int g = start_glyph; g < end_glyph; ++g)
- swidth += glyphs.effectiveAdvance(g);
- }
-
- // If the starting character is in the middle of a ligature,
- // selection should only contain the right part of that ligature
- // glyph, so we need to get the width of the left part here and
- // add it to *selectionX
- QFixed leftOffsetInLigature = offsetInLigature(logClusters, glyphs, from,
- to, start_glyph);
- *selectionX = x + soff + leftOffsetInLigature;
- *selectionWidth = swidth - leftOffsetInLigature;
- // If the ending character is also part of a ligature, swidth does
- // not contain that part yet, we also need to find out the width of
- // that left part
- *selectionWidth += offsetInLigature(logClusters, glyphs, to,
- eng->length(item), end_glyph);
- }
- return true;
-}
-
static void addSelectedRegionsToPath(QTextEngine *eng, int lineNumber, const QPointF &pos, QTextLayout::FormatRange *selection,
QPainterPath *region, QRectF boundingRect)
{
@@ -1382,18 +1214,9 @@ void QTextLayout::drawCursor(QPainter *p, const QPointF &pos, int cursorPosition
QFixed pos_y = QFixed::fromReal(position.y());
cursorPosition = qBound(0, cursorPosition, d->layoutData->string.length());
- int line = 0;
- if (cursorPosition == d->layoutData->string.length()) {
- line = d->lines.size() - 1;
- } else {
- // ### binary search
- for (line = 0; line < d->lines.size(); line++) {
- const QScriptLine &sl = d->lines[line];
- if (sl.from <= cursorPosition && sl.from + (int)sl.length > cursorPosition)
- break;
- }
- }
-
+ int line = d->lineNumberForTextPosition(cursorPosition);
+ if (line < 0)
+ line = 0;
if (line >= d->lines.size())
return;
@@ -1402,7 +1225,15 @@ void QTextLayout::drawCursor(QPainter *p, const QPointF &pos, int cursorPosition
qreal x = position.x() + l.cursorToX(cursorPosition);
- int itm = d->findItem(cursorPosition - 1);
+ int itm;
+
+ if (d->visualCursorMovement()) {
+ if (cursorPosition == sl.from + sl.length)
+ cursorPosition--;
+ itm = d->findItem(cursorPosition);
+ } else
+ itm = d->findItem(cursorPosition - 1);
+
QFixed base = sl.base();
QFixed descent = sl.descent;
bool rightToLeft = d->isRightToLeft();
@@ -1512,7 +1343,7 @@ QRectF QTextLine::rect() const
QRectF QTextLine::naturalTextRect() const
{
const QScriptLine& sl = eng->lines[i];
- QFixed x = sl.x + alignLine(eng, sl);
+ QFixed x = sl.x + eng->alignLine(sl);
QFixed width = sl.textWidth;
if (sl.justified)
@@ -2632,9 +2463,10 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
eng->itemize();
const QScriptLine &line = eng->lines[i];
+ bool lastLine = i >= eng->lines.size() - 1;
QFixed x = line.x;
- x += alignLine(eng, line);
+ x += eng->alignLine(line);
if (!i && !eng->layoutData->items.size()) {
*cursorPos = 0;
@@ -2720,21 +2552,29 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
logClusters = eng->logClusters(si);
glyphs = eng->shapedGlyphs(si);
if (si->analysis.flags >= QScriptAnalysis::TabOrObject) {
- if(pos == l)
+ if (pos == (reverse ? 0 : l))
x += si->width;
} else {
+ bool rtl = eng->isRightToLeft();
+ bool visual = eng->visualCursorMovement();
if (reverse) {
int end = qMin(lineEnd, si->position + l) - si->position;
int glyph_end = end == l ? si->num_glyphs : logClusters[end];
- for (int i = glyph_end - 1; i >= glyph_pos; i--)
+ int glyph_start = glyph_pos;
+ if (visual && !rtl && !(lastLine && itm == (visualOrder[nItems - 1] + firstItem)))
+ glyph_start++;
+ for (int i = glyph_end - 1; i >= glyph_start; i--)
x += glyphs.effectiveAdvance(i);
} else {
int start = qMax(line.from - si->position, 0);
int glyph_start = logClusters[start];
- for (int i = glyph_start; i < glyph_pos; i++)
+ int glyph_end = glyph_pos;
+ if (!visual || !rtl || (lastLine && itm == visualOrder[0] + firstItem))
+ glyph_end--;
+ for (int i = glyph_start; i <= glyph_end; i++)
x += glyphs.effectiveAdvance(i);
}
- x += offsetInLigature(logClusters, glyphs, pos, line.length, glyph_pos);
+ x += eng->offsetInLigature(si, pos, line.length, glyph_pos);
}
*cursorPos = pos + si->position;
@@ -2753,6 +2593,8 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
{
QFixed x = QFixed::fromReal(_x);
const QScriptLine &line = eng->lines[i];
+ bool lastLine = i >= eng->lines.size() - 1;
+ int lineNum = i;
if (!eng->layoutData)
eng->itemize();
@@ -2770,7 +2612,7 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
return 0;
x -= line.x;
- x -= alignLine(eng, line);
+ x -= eng->alignLine(line);
// qDebug("xToCursor: x=%f, cpos=%d", x.toReal(), cpos);
QVarLengthArray<int> visualOrder(nItems);
@@ -2779,6 +2621,7 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
levels[i] = eng->layoutData->items[i+firstItem].analysis.bidiLevel;
QTextEngine::bidiReorder(nItems, levels.data(), visualOrder.data());
+ bool visual = eng->visualCursorMovement();
if (x <= 0) {
// left of first item
int item = visualOrder[0]+firstItem;
@@ -2795,8 +2638,13 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
|| (line.justified && x < line.width)) {
// has to be in one of the runs
QFixed pos;
+ bool rtl = eng->isRightToLeft();
eng->shapeLine(line);
+ QVector<int> insertionPoints;
+ if (visual && rtl)
+ eng->insertionPointsForLine(lineNum, insertionPoints);
+ int nchars = 0;
for (int i = 0; i < nItems; ++i) {
int item = visualOrder[i]+firstItem;
QScriptItem &si = eng->layoutData->items[item];
@@ -2826,6 +2674,7 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
if (pos + item_width < x) {
pos += item_width;
+ nchars += end;
continue;
}
// qDebug(" inside run");
@@ -2870,27 +2719,60 @@ int QTextLine::xToCursor(qreal _x, CursorPosition cpos) const
} else {
QFixed dist = INT_MAX/256;
if (si.analysis.bidiLevel % 2) {
- pos += item_width;
- while (gs <= ge) {
- if (glyphs.attributes[gs].clusterStart && qAbs(x-pos) < dist) {
- glyph_pos = gs;
- dist = qAbs(x-pos);
+ if (!visual || rtl || (lastLine && i == nItems - 1)) {
+ pos += item_width;
+ while (gs <= ge) {
+ if (glyphs.attributes[gs].clusterStart && qAbs(x-pos) < dist) {
+ glyph_pos = gs;
+ dist = qAbs(x-pos);
+ }
+ pos -= glyphs.effectiveAdvance(gs);
+ ++gs;
+ }
+ } else {
+ while (ge >= gs) {
+ if (glyphs.attributes[ge].clusterStart && qAbs(x-pos) < dist) {
+ glyph_pos = ge;
+ dist = qAbs(x-pos);
+ }
+ pos += glyphs.effectiveAdvance(ge);
+ --ge;
}
- pos -= glyphs.effectiveAdvance(gs);
- ++gs;
}
} else {
- while (gs <= ge) {
- if (glyphs.attributes[gs].clusterStart && qAbs(x-pos) < dist) {
- glyph_pos = gs;
- dist = qAbs(x-pos);
+ if (!visual || !rtl || (lastLine && i == 0)) {
+ while (gs <= ge) {
+ if (glyphs.attributes[gs].clusterStart && qAbs(x-pos) < dist) {
+ glyph_pos = gs;
+ dist = qAbs(x-pos);
+ }
+ pos += glyphs.effectiveAdvance(gs);
+ ++gs;
}
- pos += glyphs.effectiveAdvance(gs);
- ++gs;
+ } else {
+ QFixed oldPos = pos;
+ while (gs <= ge) {
+ pos += glyphs.effectiveAdvance(gs);
+ if (glyphs.attributes[gs].clusterStart && qAbs(x-pos) < dist) {
+ glyph_pos = gs;
+ dist = qAbs(x-pos);
+ }
+ ++gs;
+ }
+ pos = oldPos;
}
}
- if (qAbs(x-pos) < dist)
+ if (qAbs(x-pos) < dist) {
+ if (visual) {
+ if (!rtl && i < nItems - 1) {
+ nchars += end;
+ continue;
+ }
+ if (rtl && nchars > 0)
+ return insertionPoints[lastLine ? nchars : nchars - 1];
+ }
return si.position + end;
+ }
}
Q_ASSERT(glyph_pos != -1);
int j;
diff --git a/src/gui/text/qtextlayout.h b/src/gui/text/qtextlayout.h
index 9dd8ebd..6aa81f9 100644
--- a/src/gui/text/qtextlayout.h
+++ b/src/gui/text/qtextlayout.h
@@ -50,6 +50,7 @@
#include <QtGui/qevent.h>
#include <QtGui/qtextformat.h>
#include <QtGui/qglyphs.h>
+#include <QtGui/qtextcursor.h>
QT_BEGIN_HEADER
@@ -136,6 +137,9 @@ public:
void setCacheEnabled(bool enable);
bool cacheEnabled() const;
+ void setCursorMoveStyle(QTextCursor::MoveStyle style);
+ QTextCursor::MoveStyle cursorMoveStyle() const;
+
void beginLayout();
void endLayout();
void clearLayout();
@@ -153,6 +157,8 @@ public:
bool isValidCursorPosition(int pos) const;
int nextCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
int previousCursorPosition(int oldPos, CursorMode mode = SkipCharacters) const;
+ int leftCursorPosition(int oldPos) const;
+ int rightCursorPosition(int oldPos) const;
void draw(QPainter *p, const QPointF &pos, const QVector<FormatRange> &selections = QVector<FormatRange>(),
const QRectF &clip = QRectF()) const;
diff --git a/src/gui/text/text.pri b/src/gui/text/text.pri
index df9398c..83be5b4 100644
--- a/src/gui/text/text.pri
+++ b/src/gui/text/text.pri
@@ -114,6 +114,9 @@ unix:x11 {
OBJECTIVE_SOURCES += \
text/qfontengine_coretext.mm \
text/qfontengine_mac.mm
+ contains(QT_CONFIG, harfbuzz) {
+ DEFINES += QT_ENABLE_HARFBUZZ_FOR_MAC
+ }
}
embedded {