5 files changed, 183 insertions, 50 deletions

diff --git a/src/gui/text/qtextcontrol.cpp b/src/gui/text/qtextcontrol.cpp
index 58bfbc6..6babca1 100644
--- a/src/gui/text/qtextcontrol.cpp
+++ b/src/gui/text/qtextcontrol.cpp
@@ -114,6 +114,7 @@ static QTextLine currentTextLine(const QTextCursor &cursor)
 QTextControlPrivate::QTextControlPrivate()
     : doc(0), cursorOn(false), cursorIsFocusIndicator(false),
       interactionFlags(Qt::TextEditorInteraction),
+      dragEnabled(true),
 #ifndef QT_NO_DRAGANDDROP
       mousePressed(false), mightStartDrag(false),
 #endif
@@ -128,7 +129,8 @@ QTextControlPrivate::QTextControlPrivate()
       isEnabled(true),
       hadSelectionOnMousePress(false),
       ignoreUnusedNavigationEvents(false),
-      openExternalLinks(false)
+      openExternalLinks(false),
+      wordSelectionEnabled(false)
 {}
 
 bool QTextControlPrivate::cursorMoveKeyEvent(QKeyEvent *e)
@@ -282,7 +284,7 @@ bool QTextControlPrivate::cursorMoveKeyEvent(QKeyEvent *e)
         if (cursor.position() != oldCursorPos)
             emit q->cursorPositionChanged();
         emit q->microFocusChanged();
-    } else if (ignoreNavigationEvents && isNavigationEvent) {
+    } else if (ignoreNavigationEvents && isNavigationEvent && oldSelection.anchor() == cursor.anchor()) {
         return false;
     }
 
@@ -930,15 +932,18 @@ void QTextControl::processEvent(QEvent *e, const QMatrix &matrix, QWidget *conte
             break; }
         case QEvent::MouseMove: {
             QMouseEvent *ev = static_cast<QMouseEvent *>(e);
-            d->mouseMoveEvent(ev->buttons(), matrix.map(ev->pos()));
+            d->mouseMoveEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(),
+                              ev->buttons(), ev->globalPos());
             break; }
         case QEvent::MouseButtonRelease: {
             QMouseEvent *ev = static_cast<QMouseEvent *>(e);
-            d->mouseReleaseEvent(ev->button(), matrix.map(ev->pos()));
+            d->mouseReleaseEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(),
+                                 ev->buttons(), ev->globalPos());
             break; }
         case QEvent::MouseButtonDblClick: {
             QMouseEvent *ev = static_cast<QMouseEvent *>(e);
-            d->mouseDoubleClickEvent(e, ev->button(), matrix.map(ev->pos()));
+            d->mouseDoubleClickEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(),
+                                     ev->buttons(), ev->globalPos());
             break; }
         case QEvent::InputMethod:
             d->inputMethodEvent(static_cast<QInputMethodEvent *>(e));
@@ -998,15 +1003,18 @@ void QTextControl::processEvent(QEvent *e, const QMatrix &matrix, QWidget *conte
             break; }
         case QEvent::GraphicsSceneMouseMove: {
             QGraphicsSceneMouseEvent *ev = static_cast<QGraphicsSceneMouseEvent *>(e);
-            d->mouseMoveEvent(ev->buttons(), matrix.map(ev->pos()));
+            d->mouseMoveEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(), ev->buttons(),
+                              ev->screenPos());
             break; }
         case QEvent::GraphicsSceneMouseRelease: {
             QGraphicsSceneMouseEvent *ev = static_cast<QGraphicsSceneMouseEvent *>(e);
-            d->mouseReleaseEvent(ev->button(), matrix.map(ev->pos()));
+            d->mouseReleaseEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(), ev->buttons(),
+                                 ev->screenPos());
             break; }
         case QEvent::GraphicsSceneMouseDoubleClick: {
             QGraphicsSceneMouseEvent *ev = static_cast<QGraphicsSceneMouseEvent *>(e);
-            d->mouseDoubleClickEvent(e, ev->button(), matrix.map(ev->pos()));
+            d->mouseDoubleClickEvent(ev, ev->button(), matrix.map(ev->pos()), ev->modifiers(), ev->buttons(),
+                                     ev->screenPos());
             break; }
         case QEvent::GraphicsSceneContextMenu: {
             QGraphicsSceneContextMenuEvent *ev = static_cast<QGraphicsSceneContextMenuEvent *>(e);
@@ -1015,7 +1023,8 @@ void QTextControl::processEvent(QEvent *e, const QMatrix &matrix, QWidget *conte
 
         case QEvent::GraphicsSceneHoverMove: {
             QGraphicsSceneHoverEvent *ev = static_cast<QGraphicsSceneHoverEvent *>(e);
-            d->mouseMoveEvent(Qt::NoButton, matrix.map(ev->pos()));
+            d->mouseMoveEvent(ev, Qt::NoButton, matrix.map(ev->pos()), ev->modifiers(),Qt::NoButton,
+                              ev->screenPos());
             break; }
 
         case QEvent::GraphicsSceneDragEnter: {
@@ -1485,6 +1494,11 @@ void QTextControlPrivate::mousePressEvent(QEvent *e, Qt::MouseButton button, con
 {
     Q_Q(QTextControl);
 
+    if (sendMouseEventToInputContext(
+            e, QEvent::MouseButtonPress, button, pos, modifiers, buttons, globalPos)) {
+        return;
+    }
+
     if (interactionFlags & Qt::LinksAccessibleByMouse) {
         anchorOnMousePress = q->anchorAt(pos);
 
@@ -1527,31 +1541,22 @@ void QTextControlPrivate::mousePressEvent(QEvent *e, Qt::MouseButton button, con
             return;
         }
 
-#if !defined(QT_NO_IM)
-        QTextLayout *layout = cursor.block().layout();
-        if (contextWidget && layout && !layout->preeditAreaText().isEmpty()) {
-            QInputContext *ctx = inputContext();
-            if (ctx) {
-                QMouseEvent ev(QEvent::MouseButtonPress, contextWidget->mapFromGlobal(globalPos), globalPos,
-                               button, buttons, modifiers);
-                ctx->mouseHandler(cursorPos - cursor.position(), &ev);
+        if (modifiers == Qt::ShiftModifier && (interactionFlags & Qt::TextSelectableByMouse)) {
+            if (wordSelectionEnabled && !selectedWordOnDoubleClick.hasSelection()) {
+                selectedWordOnDoubleClick = cursor;
+                selectedWordOnDoubleClick.select(QTextCursor::WordUnderCursor);
             }
-            if (!layout->preeditAreaText().isEmpty()) {
-                e->ignore();
-                return;
-            }
-        }
-#endif
-        if (modifiers == Qt::ShiftModifier) {
+
             if (selectedBlockOnTrippleClick.hasSelection())
                 extendBlockwiseSelection(cursorPos);
             else if (selectedWordOnDoubleClick.hasSelection())
                 extendWordwiseSelection(cursorPos, pos.x());
-            else
+            else if (wordSelectionEnabled)
                 setCursorPosition(cursorPos, QTextCursor::KeepAnchor);
         } else {
 
-            if (cursor.hasSelection()
+            if (dragEnabled
+                && cursor.hasSelection()
                 && !cursorIsFocusIndicator
                 && cursorPos >= cursor.selectionStart()
                 && cursorPos <= cursor.selectionEnd()
@@ -1581,10 +1586,16 @@ void QTextControlPrivate::mousePressEvent(QEvent *e, Qt::MouseButton button, con
     hadSelectionOnMousePress = cursor.hasSelection();
 }
 
-void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF &mousePos)
+void QTextControlPrivate::mouseMoveEvent(QEvent *e, Qt::MouseButton button, const QPointF &mousePos, Qt::KeyboardModifiers modifiers,
+                                         Qt::MouseButtons buttons, const QPoint &globalPos)
 {
     Q_Q(QTextControl);
 
+    if (sendMouseEventToInputContext(
+            e, QEvent::MouseMove, button, mousePos, modifiers, buttons, globalPos)) {
+        return;
+    }
+
     if (interactionFlags & Qt::LinksAccessibleByMouse) {
         QString anchor = q->anchorAt(mousePos);
         if (anchor != highlightedAnchor) {
@@ -1596,7 +1607,10 @@ void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF
     if (!(buttons & Qt::LeftButton))
         return;
 
-    if (!((interactionFlags & Qt::TextSelectableByMouse) || (interactionFlags & Qt::TextEditable)))
+    const bool selectable = interactionFlags & Qt::TextSelectableByMouse;
+    const bool editable = interactionFlags & Qt::TextEditable;
+
+    if (!selectable && !editable)
         return;
 
     if (!(mousePressed
@@ -1612,18 +1626,21 @@ void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF
             startDrag();
         return;
     }
-    const qreal mouseX = qreal(mousePos.x());
 
-#if !defined(QT_NO_IM)
-    QTextLayout *layout = cursor.block().layout();
-    if (layout && !layout->preeditAreaText().isEmpty())
+    if (!selectable)
         return;
-#endif
+
+    const qreal mouseX = qreal(mousePos.x());
 
     int newCursorPos = q->hitTest(mousePos, Qt::FuzzyHit);
     if (newCursorPos == -1)
         return;
 
+    if (wordSelectionEnabled && !selectedWordOnDoubleClick.hasSelection()) {
+        selectedWordOnDoubleClick = cursor;
+        selectedWordOnDoubleClick.select(QTextCursor::WordUnderCursor);
+    }
+
     if (selectedBlockOnTrippleClick.hasSelection())
         extendBlockwiseSelection(newCursorPos);
     else if (selectedWordOnDoubleClick.hasSelection())
@@ -1639,8 +1656,10 @@ void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF
             emit q->cursorPositionChanged();
         _q_updateCurrentCharFormatAndSelection();
 #ifndef QT_NO_IM
-        if (QInputContext *ic = inputContext()) {
-            ic->update();
+        if (contextWidget) {
+            if (QInputContext *ic = inputContext()) {
+                ic->update();
+            }
         }
 #endif //QT_NO_IM
     } else {
@@ -1652,10 +1671,16 @@ void QTextControlPrivate::mouseMoveEvent(Qt::MouseButtons buttons, const QPointF
     repaintOldAndNewSelection(oldSelection);
 }
 
-void QTextControlPrivate::mouseReleaseEvent(Qt::MouseButton button, const QPointF &pos)
+void QTextControlPrivate::mouseReleaseEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos, Qt::KeyboardModifiers modifiers,
+                                            Qt::MouseButtons buttons, const QPoint &globalPos)
 {
     Q_Q(QTextControl);
 
+    if (sendMouseEventToInputContext(
+            e, QEvent::MouseButtonRelease, button, pos, modifiers, buttons, globalPos)) {
+        return;
+    }
+
     const QTextCursor oldSelection = cursor;
     const int oldCursorPos = cursor.position();
 
@@ -1713,19 +1738,21 @@ void QTextControlPrivate::mouseReleaseEvent(Qt::MouseButton button, const QPoint
     }
 }
 
-void QTextControlPrivate::mouseDoubleClickEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos)
+void QTextControlPrivate::mouseDoubleClickEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos, Qt::KeyboardModifiers modifiers,
+                                                Qt::MouseButtons buttons, const QPoint &globalPos)
 {
     Q_Q(QTextControl);
+
+    if (sendMouseEventToInputContext(
+            e, QEvent::MouseButtonDblClick, button, pos, modifiers, buttons, globalPos)) {
+        return;
+    }
+
     if (button != Qt::LeftButton
         || !(interactionFlags & Qt::TextSelectableByMouse)) {
         e->ignore();
         return;
     }
-#if !defined(QT_NO_IM)
-    QTextLayout *layout = cursor.block().layout();
-    if (layout && !layout->preeditAreaText().isEmpty())
-        return;
-#endif
 
 #ifndef QT_NO_DRAGANDDROP
     mightStartDrag = false;
@@ -1754,6 +1781,45 @@ void QTextControlPrivate::mouseDoubleClickEvent(QEvent *e, Qt::MouseButton butto
     }
 }
 
+bool QTextControlPrivate::sendMouseEventToInputContext(
+        QEvent *e, QEvent::Type eventType, Qt::MouseButton button, const QPointF &pos,
+        Qt::KeyboardModifiers modifiers, Qt::MouseButtons buttons, const QPoint &globalPos)
+{
+#if !defined(QT_NO_IM)
+    Q_Q(QTextControl);
+
+    QTextLayout *layout = cursor.block().layout();
+    if (contextWidget && layout && !layout->preeditAreaText().isEmpty()) {
+        QInputContext *ctx = inputContext();
+        int cursorPos = q->hitTest(pos, Qt::FuzzyHit) - cursor.position();
+
+        if (cursorPos < 0 || cursorPos > layout->preeditAreaText().length()) {
+            cursorPos = -1;
+            // don't send move events outside the preedit area
+            if (eventType == QEvent::MouseMove)
+                return true;
+        }
+        if (ctx) {
+            QMouseEvent ev(eventType, contextWidget->mapFromGlobal(globalPos), globalPos,
+                           button, buttons, modifiers);
+            ctx->mouseHandler(cursorPos, &ev);
+            e->setAccepted(ev.isAccepted());
+        }
+        if (!layout->preeditAreaText().isEmpty())
+            return true;
+    }
+#else
+    Q_UNUSED(e);
+    Q_UNUSED(eventType);
+    Q_UNUSED(button);
+    Q_UNUSED(pos);
+    Q_UNUSED(modifiers);
+    Q_UNUSED(buttons);
+    Q_UNUSED(globalPos);
+#endif
+    return false;
+}
+
 void QTextControlPrivate::contextMenuEvent(const QPoint &screenPos, const QPointF &docPos, QWidget *contextWidget)
 {
 #ifdef QT_NO_CONTEXTMENU
@@ -2328,6 +2394,31 @@ bool QTextControl::cursorIsFocusIndicator() const
     return d->cursorIsFocusIndicator;
 }
 
+
+void QTextControl::setDragEnabled(bool enabled)
+{
+    Q_D(QTextControl);
+    d->dragEnabled = enabled;
+}
+
+bool QTextControl::isDragEnabled() const
+{
+    Q_D(const QTextControl);
+    return d->dragEnabled;
+}
+
+void QTextControl::setWordSelectionEnabled(bool enabled)
+{
+    Q_D(QTextControl);
+    d->wordSelectionEnabled = enabled;
+}
+
+bool QTextControl::isWordSelectionEnabled() const
+{
+    Q_D(const QTextControl);
+    return d->wordSelectionEnabled;
+}
+
 #ifndef QT_NO_PRINTER
 void QTextControl::print(QPrinter *printer) const
 {
diff --git a/src/gui/text/qtextcontrol_p.h b/src/gui/text/qtextcontrol_p.h
index 6540f4f..31fa843 100644
--- a/src/gui/text/qtextcontrol_p.h
+++ b/src/gui/text/qtextcontrol_p.h
@@ -175,6 +175,12 @@ public:
     void setCursorIsFocusIndicator(bool b);
     bool cursorIsFocusIndicator() const;
 
+    void setDragEnabled(bool enabled);
+    bool isDragEnabled() const;
+
+    bool isWordSelectionEnabled() const;
+    void setWordSelectionEnabled(bool enabled);
+
 #ifndef QT_NO_PRINTER
     void print(QPrinter *printer) const;
 #endif
@@ -183,8 +189,6 @@ public:
     virtual QRectF blockBoundingRect(const QTextBlock &block) const;
     QAbstractTextDocumentLayout::PaintContext getPaintContext(QWidget *widget) const;
 
-
-
 public Q_SLOTS:
     void setPlainText(const QString &text);
     void setHtml(const QString &text);
diff --git a/src/gui/text/qtextcontrol_p_p.h b/src/gui/text/qtextcontrol_p_p.h
index 04f4c75..94670e2 100644
--- a/src/gui/text/qtextcontrol_p_p.h
+++ b/src/gui/text/qtextcontrol_p_p.h
@@ -135,9 +135,23 @@ public:
                          Qt::KeyboardModifiers modifiers,
                          Qt::MouseButtons buttons,
                          const QPoint &globalPos);
-    void mouseMoveEvent(Qt::MouseButtons buttons, const QPointF &pos);
-    void mouseReleaseEvent(Qt::MouseButton button, const QPointF &pos);
-    void mouseDoubleClickEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos);
+    void mouseMoveEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos,
+                        Qt::KeyboardModifiers modifiers,
+                        Qt::MouseButtons buttons,
+                        const QPoint &globalPos);
+    void mouseReleaseEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos,
+                           Qt::KeyboardModifiers modifiers,
+                           Qt::MouseButtons buttons,
+                           const QPoint &globalPos);
+    void mouseDoubleClickEvent(QEvent *e, Qt::MouseButton button, const QPointF &pos,
+                               Qt::KeyboardModifiers modifiers,
+                               Qt::MouseButtons buttons,
+                               const QPoint &globalPos);
+    bool sendMouseEventToInputContext(QEvent *e,  QEvent::Type eventType, Qt::MouseButton button,
+                                      const QPointF &pos,
+                                      Qt::KeyboardModifiers modifiers,
+                                      Qt::MouseButtons buttons,
+                                      const QPoint &globalPos);
     void contextMenuEvent(const QPoint &screenPos, const QPointF &docPos, QWidget *contextWidget);
     void focusEvent(QFocusEvent *e);
 #ifdef QT_KEYPAD_NAVIGATION
@@ -174,6 +188,8 @@ public:
     QBasicTimer trippleClickTimer;
     QPointF trippleClickPoint;
 
+    bool dragEnabled;
+
     bool mousePressed;
 
     bool mightStartDrag;
@@ -209,6 +225,8 @@ public:
     bool ignoreUnusedNavigationEvents;
     bool openExternalLinks;
 
+    bool wordSelectionEnabled;
+
     QString linkToCopy;
     void _q_copyLink();
     void _q_updateBlock(const QTextBlock &);
diff --git a/src/gui/text/qtextdocumentlayout.cpp b/src/gui/text/qtextdocumentlayout.cpp
index 65fe0f8..5e59341 100644
--- a/src/gui/text/qtextdocumentlayout.cpp
+++ b/src/gui/text/qtextdocumentlayout.cpp
@@ -513,6 +513,9 @@ public:
 
     qreal scaleToDevice(qreal value) const;
     QFixed scaleToDevice(QFixed value) const;
+
+    qreal lineH;
+    QTextDocumentLayout::LineHeightMode lineHeightMode;
 };
 
 QTextDocumentLayoutPrivate::QTextDocumentLayoutPrivate()
@@ -520,7 +523,9 @@ QTextDocumentLayoutPrivate::QTextDocumentLayoutPrivate()
       cursorWidth(1),
       currentLazyLayoutPosition(-1),
       lazyLayoutStepSize(1000),
-      lastPageCount(-1)
+      lastPageCount(-1),
+      lineH(1),
+      lineHeightMode(QTextDocumentLayout::ProportionalHeight)
 {
     showLayoutProgress = true;
     insideDocumentChange = false;
@@ -2639,7 +2644,10 @@ void QTextDocumentLayoutPrivate::layoutBlock(const QTextBlock &bl, int blockPosi
 
             }
 
-            QFixed lineHeight = QFixed::fromReal(line.height());
+            // TODO: replace with proper line height support in 4.8
+            QFixed lineHeight = (lineHeightMode == QTextDocumentLayout::FixedHeight)
+                    ? QFixed::fromReal(lineH) : QFixed::fromReal(line.height() * lineH);
+
             if (layoutStruct->pageHeight > 0 && layoutStruct->absoluteY() + lineHeight > layoutStruct->pageBottom) {
                 layoutStruct->newPage();
 
@@ -2714,6 +2722,13 @@ void QTextDocumentLayoutPrivate::layoutBlock(const QTextBlock &bl, int blockPosi
     }
 }
 
+void QTextDocumentLayout::setLineHeight(qreal lineH, QTextDocumentLayout::LineHeightMode mode = QTextDocumentLayout::ProportionalHeight)
+{
+    Q_D(QTextDocumentLayout);
+    d->lineH = lineH;
+    d->lineHeightMode = mode;
+}
+
 void QTextDocumentLayoutPrivate::floatMargins(const QFixed &y, const QTextLayoutStruct *layoutStruct,
                                               QFixed *left, QFixed *right) const
 {
diff --git a/src/gui/text/qtextdocumentlayout_p.h b/src/gui/text/qtextdocumentlayout_p.h
index 3c0383c..3e3e485 100644
--- a/src/gui/text/qtextdocumentlayout_p.h
+++ b/src/gui/text/qtextdocumentlayout_p.h
@@ -63,7 +63,7 @@ class QTextListFormat;
 
 class QTextDocumentLayoutPrivate;
 
-class Q_AUTOTEST_EXPORT QTextDocumentLayout : public QAbstractTextDocumentLayout
+class Q_GUI_EXPORT QTextDocumentLayout : public QAbstractTextDocumentLayout
 {
     Q_DECLARE_PRIVATE(QTextDocumentLayout)
     Q_OBJECT
@@ -109,6 +109,11 @@ protected:
     void drawInlineObject(QPainter *p, const QRectF &rect, QTextInlineObject item,
                           int posInDocument, const QTextFormat &format);
     virtual void timerEvent(QTimerEvent *e);
+
+    // TODO: remove when we support line height properly in 4.8
+    enum LineHeightMode { ProportionalHeight, FixedHeight };
+    void setLineHeight(qreal lineHeight, QTextDocumentLayout::LineHeightMode mode);
+
 private:
     QRectF doLayout(int from, int oldLength, int length);
     void layoutFinished();