diff options
author | Eskil Abrahamsen Blomfeldt <eblomfel@trolltech.com> | 2011-04-23 09:35:30 (GMT) |
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committer | Eskil Abrahamsen Blomfeldt <eblomfel@trolltech.com> | 2011-04-23 09:35:30 (GMT) |
commit | 28c7e17d9eeb8264ad9e26a5b93e5ff744add9a6 (patch) | |
tree | 6ae5d35d88c2d5675015e38bf802176a1bcff6e0 /src/gui/text | |
parent | 6c121991f85164d257208b14845c7ff913a687f4 (diff) | |
parent | d805cf6f5fe4961093a0698ae6df18400536d2e0 (diff) | |
download | Qt-28c7e17d9eeb8264ad9e26a5b93e5ff744add9a6.zip Qt-28c7e17d9eeb8264ad9e26a5b93e5ff744add9a6.tar.gz Qt-28c7e17d9eeb8264ad9e26a5b93e5ff744add9a6.tar.bz2 |
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.cpp | 6 | ||||
-rw-r--r-- | src/gui/text/qtextcursor.cpp | 42 | ||||
-rw-r--r-- | src/gui/text/qtextcursor.h | 4 | ||||
-rw-r--r-- | src/gui/text/qtextdocument.cpp | 23 | ||||
-rw-r--r-- | src/gui/text/qtextdocument.h | 5 | ||||
-rw-r--r-- | src/gui/text/qtextdocument_p.cpp | 15 | ||||
-rw-r--r-- | src/gui/text/qtextdocument_p.h | 4 | ||||
-rw-r--r-- | src/gui/text/qtextengine.cpp | 331 | ||||
-rw-r--r-- | src/gui/text/qtextengine_p.h | 60 | ||||
-rw-r--r-- | src/gui/text/qtextlayout.cpp | 394 | ||||
-rw-r--r-- | src/gui/text/qtextlayout.h | 6 | ||||
-rw-r--r-- | src/gui/text/text.pri | 3 |
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 { |