Merge commit 'origin/4.6' into 4.6

6 files changed, 71 insertions, 39 deletions

diff --git a/src/gui/text/qfontengine_qpf.cpp b/src/gui/text/qfontengine_qpf.cpp
index 6ff0fbd..94974fc 100644
--- a/src/gui/text/qfontengine_qpf.cpp
+++ b/src/gui/text/qfontengine_qpf.cpp
@@ -819,7 +819,7 @@ FT_Face QFontEngineQPF::lockFace() const
     FT_Face face = freetype->face;
 
     // ### not perfect
-    const int ysize = int(fontDef.pixelSize) << 6;
+    const int ysize = qRound(fontDef.pixelSize * qreal(64));
     const int xsize = ysize;
 
     if (freetype->xsize != xsize || freetype->ysize != ysize) {
diff --git a/src/gui/text/qtextcontrol.cpp b/src/gui/text/qtextcontrol.cpp
index ee8b751..3f6545c 100644
--- a/src/gui/text/qtextcontrol.cpp
+++ b/src/gui/text/qtextcontrol.cpp
@@ -1619,9 +1619,11 @@ void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF
         if (cursor.position() != oldCursorPos)
             emit q->cursorPositionChanged();
         _q_updateCurrentCharFormatAndSelection();
+#ifndef QT_NO_IM
         if (QInputContext *ic = inputContext()) {
             ic->update();
         }
+#endif //QT_NO_IM
     } else {
         //emit q->visibilityRequest(QRectF(mousePos, QSizeF(1, 1)));
         if (cursor.position() != oldCursorPos)
diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index 6978b6c..1aad385 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -958,6 +958,8 @@ QString QTextDocument::defaultStyleSheet() const
 
 /*!
     Returns true if undo is available; otherwise returns false.
+
+    \sa isRedoAvailable(), availableUndoSteps()
 */
 bool QTextDocument::isUndoAvailable() const
 {
@@ -967,6 +969,8 @@ bool QTextDocument::isUndoAvailable() const
 
 /*!
     Returns true if redo is available; otherwise returns false.
+
+    \sa isUndoAvailable(), availableRedoSteps()
 */
 bool QTextDocument::isRedoAvailable() const
 {
@@ -974,6 +978,29 @@ bool QTextDocument::isRedoAvailable() const
     return d->isRedoAvailable();
 }
 
+/*! \since 4.6
+
+    Returns the number of available undo steps.
+
+    \sa isUndoAvailable()
+*/
+int QTextDocument::availableUndoSteps() const
+{
+    Q_D(const QTextDocument);
+    return d->availableUndoSteps();
+}
+
+/*! \since 4.6
+
+    Returns the number of available redo steps.
+
+    \sa isRedoAvailable()
+*/
+int QTextDocument::availableRedoSteps() const
+{
+    Q_D(const QTextDocument);
+    return d->availableRedoSteps();
+}
 
 /*! \since 4.4
 
diff --git a/src/gui/text/qtextdocument.h b/src/gui/text/qtextdocument.h
index e52716a..d217a4d 100644
--- a/src/gui/text/qtextdocument.h
+++ b/src/gui/text/qtextdocument.h
@@ -142,6 +142,9 @@ public:
     bool isUndoAvailable() const;
     bool isRedoAvailable() const;
 
+    int availableUndoSteps() const;
+    int availableRedoSteps() const;
+
     int revision() const;
 
     void setDocumentLayout(QAbstractTextDocumentLayout *layout);
diff --git a/src/gui/text/qtextdocument_p.h b/src/gui/text/qtextdocument_p.h
index ce25c57..c10855b 100644
--- a/src/gui/text/qtextdocument_p.h
+++ b/src/gui/text/qtextdocument_p.h
@@ -212,6 +212,9 @@ public:
     inline bool isUndoAvailable() const { return undoEnabled && undoState > 0; }
     inline bool isRedoAvailable() const { return undoEnabled && undoState < undoStack.size(); }
 
+    inline int availableUndoSteps() const { return undoEnabled ? undoState : 0; }
+    inline int availableRedoSteps() const { return undoEnabled ? qMax(undoStack.size() - undoState - 1, 0) : 0; }
+
     inline QString buffer() const { return text; }
     QString plainText() const;
     inline int length() const { return fragments.length(); }
diff --git a/src/gui/text/qtextengine_mac.cpp b/src/gui/text/qtextengine_mac.cpp
index eeccc72..54be53b 100644
--- a/src/gui/text/qtextengine_mac.cpp
+++ b/src/gui/text/qtextengine_mac.cpp
@@ -594,53 +594,50 @@ void QTextEngine::shapeTextMac(int item) const
         str = reinterpret_cast<const QChar *>(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);
+    ensureSpace(num_glyphs);
+    num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used;
 
-        if (fe->stringToCMap(str,
-                             len,
-                             &g,
-                             &num_glyphs,
-                             flags,
-                             log_clusters,
-                             attributes())) {
+    QGlyphLayout g = availableGlyphs(&si);
+    g.numGlyphs = num_glyphs;
+    unsigned short *log_clusters = logClusters(&si);
 
-            heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs);
-            break;
-        }
+    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<QArabicProperties> 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<QArabicProperties> 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;
+            }
         }
     }