diff options
| -rw-r--r-- | src/gui/text/qtextengine.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp index 2b84c6c..ba9145e 100644 --- a/src/gui/text/qtextengine.cpp +++ b/src/gui/text/qtextengine.cpp @@ -2245,6 +2245,28 @@ void QTextEngine::indexAdditionalFormats() } } +/* These two helper functions are used to determine whether we need to insert a ZWJ character + between the text that gets truncated and the ellipsis. This is important to get + correctly shaped results for arabic text. +*/ +static bool nextCharJoins(const QString &string, int pos) +{ + while (pos < string.length() && string.at(pos).category() == QChar::Mark_NonSpacing) + ++pos; + if (pos == string.length()) + return false; + return string.at(pos).joining() != QChar::OtherJoining; +} + +static bool prevCharJoins(const QString &string, int pos) +{ + while (pos > 0 && string.at(pos - 1).category() == QChar::Mark_NonSpacing) + --pos; + if (pos == 0) + return false; + return (string.at(pos - 1).joining() == QChar::Dual || string.at(pos - 1).joining() == QChar::Center); +} + QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int flags) const { // qDebug() << "elidedText; available width" << width.toReal() << "text width:" << this->width(0, layoutData->string.length()).toReal(); @@ -2345,6 +2367,9 @@ QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int } while (nextBreak < layoutData->string.length() && currentWidth < availableWidth); + if (nextCharJoins(layoutData->string, pos)) + ellipsisText.prepend(QChar(0x200d) /* ZWJ */); + return layoutData->string.left(pos) + ellipsisText; } else if (mode == Qt::ElideLeft) { QFixed currentWidth; @@ -2362,6 +2387,9 @@ QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int } while (nextBreak > 0 && currentWidth < availableWidth); + if (prevCharJoins(layoutData->string, pos)) + ellipsisText.append(QChar(0x200d) /* ZWJ */); + return ellipsisText + layoutData->string.mid(pos); } else if (mode == Qt::ElideMiddle) { QFixed leftWidth; @@ -2391,6 +2419,11 @@ QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int && nextRightBreak > 0 && leftWidth + rightWidth < availableWidth); + if (nextCharJoins(layoutData->string, leftPos)) + ellipsisText.prepend(QChar(0x200d) /* ZWJ */); + if (prevCharJoins(layoutData->string, rightPos)) + ellipsisText.append(QChar(0x200d) /* ZWJ */); + return layoutData->string.left(leftPos) + ellipsisText + layoutData->string.mid(rightPos); } |