From 263c81d923a1ed90335a3fb05c87330630456073 Mon Sep 17 00:00:00 2001 From: Norwegian Rock Cat Date: Thu, 29 Oct 2009 14:20:46 +0100 Subject: Plug some autorelease pool leaks. Calling QWidget::setCursor() outside of the event loop causes a memory leak in Cocoa. Adding an autorelease pool plugs it. Merge-request: 1791 Reviewed-by: Richard Moe Gustavsen --- src/gui/kernel/qwidget_mac.mm | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm index ef71194938..db1181548a 100644 --- a/src/gui/kernel/qwidget_mac.mm +++ b/src/gui/kernel/qwidget_mac.mm @@ -2872,6 +2872,7 @@ void QWidgetPrivate::setCursor_sys(const QCursor &) #else Q_Q(QWidget); if (q->testAttribute(Qt::WA_WState_Created)) { + QMacCocoaAutoReleasePool pool; [qt_mac_window_for(q) invalidateCursorRectsForView:qt_mac_nativeview_for(q)]; } #endif @@ -2884,6 +2885,7 @@ void QWidgetPrivate::unsetCursor_sys() #else Q_Q(QWidget); if (q->testAttribute(Qt::WA_WState_Created)) { + QMacCocoaAutoReleasePool pool; [qt_mac_window_for(q) invalidateCursorRectsForView:qt_mac_nativeview_for(q)]; } #endif -- cgit v1.2.3 From 4204fdcc04e20eabd19704f2235ba06afa84605e Mon Sep 17 00:00:00 2001 From: Eskil Abrahamsen Blomfeldt Date: Thu, 29 Oct 2009 17:32:57 +0100 Subject: Avoid infinite loop when laying out text with unconvertible chars When the stringToCMap() fails, it can be because it did not have enough space in the layout, or it can because of other errors. In order to implement "try-again" processing in a simple way, we had an infinite loop which assumed that stringToCMap() would always succeed in the second run (which would be the case if the only possible error was "not enough space".) Since there are other possible failures not related to the number of glyphs, you could easily get into an infinite loop here, e.g. when laying out text that contains the Byte Order Mark. The fix changes the implementation to explictly try stringToCMap() twice at max, and is also how it's implemented in the default qtextengine.cpp. Task-number: QTBUG-4680 Reviewed-by: Trond Conflicts: src/gui/text/qtextengine_mac.cpp tests/auto/qtextlayout/tst_qtextlayout.cpp --- src/gui/text/qtextengine_mac.cpp | 77 ++++++++++++++---------------- tests/auto/qtextlayout/tst_qtextlayout.cpp | 14 ++++++ 2 files changed, 51 insertions(+), 40 deletions(-) diff --git a/src/gui/text/qtextengine_mac.cpp b/src/gui/text/qtextengine_mac.cpp index 4f20094303..e35f9e0d41 100644 --- a/src/gui/text/qtextengine_mac.cpp +++ b/src/gui/text/qtextengine_mac.cpp @@ -595,53 +595,50 @@ void QTextEngine::shapeTextMac(int item) const str = reinterpret_cast(uc); } - while (true) { - ensureSpace(num_glyphs); - num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used; - - QGlyphLayout g = availableGlyphs(&si); - g.numGlyphs = num_glyphs; - unsigned short *log_clusters = logClusters(&si); - - if (fe->stringToCMap(str, - len, - &g, - &num_glyphs, - flags, - log_clusters, - attributes())) { - - heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs); - break; - } + ensureSpace(num_glyphs); + num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used; + + QGlyphLayout g = availableGlyphs(&si); + g.numGlyphs = num_glyphs; + unsigned short *log_clusters = logClusters(&si); + + bool stringToCMapFailed = false; + if (!fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, attributes())) { + ensureSpace(num_glyphs); + stringToCMapFailed = fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, + attributes()); } - si.num_glyphs = num_glyphs; + if (!stringToCMapFailed) { + heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs); - layoutData->used += si.num_glyphs; + si.num_glyphs = num_glyphs; - QGlyphLayout g = shapedGlyphs(&si); + layoutData->used += si.num_glyphs; - if (si.analysis.script == QUnicodeTables::Arabic) { - QVarLengthArray props(len + 2); - QArabicProperties *properties = props.data(); - int f = si.position; - int l = len; - if (f > 0) { - --f; - ++l; - ++properties; - } - if (f + l < layoutData->string.length()) { - ++l; - } - qt_getArabicProperties((const unsigned short *)(layoutData->string.unicode()+f), l, props.data()); + QGlyphLayout g = shapedGlyphs(&si); - unsigned short *log_clusters = logClusters(&si); + if (si.analysis.script == QUnicodeTables::Arabic) { + QVarLengthArray props(len + 2); + QArabicProperties *properties = props.data(); + int f = si.position; + int l = len; + if (f > 0) { + --f; + ++l; + ++properties; + } + if (f + l < layoutData->string.length()) { + ++l; + } + qt_getArabicProperties((const unsigned short *)(layoutData->string.unicode()+f), l, props.data()); - for (int i = 0; i < len; ++i) { - int gpos = log_clusters[i]; - g.attributes[gpos].justification = properties[i].justification; + unsigned short *log_clusters = logClusters(&si); + + for (int i = 0; i < len; ++i) { + int gpos = log_clusters[i]; + g.attributes[gpos].justification = properties[i].justification; + } } } diff --git a/tests/auto/qtextlayout/tst_qtextlayout.cpp b/tests/auto/qtextlayout/tst_qtextlayout.cpp index a5fed4e27f..b02a70455c 100644 --- a/tests/auto/qtextlayout/tst_qtextlayout.cpp +++ b/tests/auto/qtextlayout/tst_qtextlayout.cpp @@ -119,6 +119,7 @@ private slots: void smallTextLengthWordWrap(); void smallTextLengthWrapAtWordBoundaryOrAnywhere(); void testLineBreakingAllSpaces(); + void lineWidthFromBOM(); private: @@ -1277,5 +1278,18 @@ void tst_QTextLayout::widthOfTabs() QCOMPARE(qRound(engine.width(0, 5)), qRound(engine.boundingBox(0, 5).width)); } +void tst_QTextLayout::lineWidthFromBOM() +{ + const QString string(QChar(0xfeff)); // BYTE ORDER MARK + QTextLayout layout(string); + layout.beginLayout(); + QTextLine line = layout.createLine(); + line.setLineWidth(INT_MAX / 256); + layout.endLayout(); + + // Don't spin into an infinite loop + } + + QTEST_MAIN(tst_QTextLayout) #include "tst_qtextlayout.moc" -- cgit v1.2.3