Make first-letter style to work with editing

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 402 matching lines @@
     }
 
     m_frame->selection()->setNonDirectionalSelectionIfNeeded(selection, granularity);
 
     return true;
 }
 
 void EventHandler::selectClosestWordFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)
 {
     Node* innerNode = result.targetNode();
+    RenderObject* renderer = result.renderer();
     VisibleSelection newSelection;
 
-    if (innerNode && innerNode->renderer()) {
-        VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+    if (innerNode && renderer) {
+        VisiblePosition pos(renderer->positionForPoint(result.localPoint()));
         if (pos.isNotNull()) {
             newSelection = VisibleSelection(pos);
             newSelection.expandUsingGranularity(WordGranularity);
         }
 
         if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange())
             newSelection.appendTrailingWhitespace();
 
         updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity);
     }
 }
 
 void EventHandler::selectClosestMisspellingFromHitTestResult(const HitTestResult& result, AppendTrailingWhitespace appendTrailingWhitespace)
 {
     Node* innerNode = result.targetNode();
+    RenderObject* renderer = result.renderer();
     VisibleSelection newSelection;
 
-    if (innerNode && innerNode->renderer()) {
-        VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+    if (innerNode && renderer) {
+        VisiblePosition pos(renderer->positionForPoint(result.localPoint()));
         Position start = pos.deepEquivalent();
         Position end = pos.deepEquivalent();
         if (pos.isNotNull()) {
             Vector<DocumentMarker*> markers = innerNode->document()->markers()->markersInRange(
                 makeRange(pos, pos).get(), DocumentMarker::Spelling | DocumentMarker::Grammar);
             if (markers.size() == 1) {
                 start.moveToOffset(markers[0]->startOffset());
                 end.moveToOffset(markers[0]->endOffset());
                 newSelection = VisibleSelection(start, end);
             }
@@ skipping 21 matching lines @@
             (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled()) ? ShouldAppendTrailingWhitespace : DontAppendTrailingWhitespace);
     }
 }
 
 void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)
 {
     if (!result.hitTestResult().isLiveLink())
         return selectClosestWordFromMouseEvent(result);
 
     Node* innerNode = result.targetNode();
+    RenderObject* renderer = result.hitTestResult().renderer();
 
-    if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
+    if (innerNode && renderer && m_mouseDownMayStartSelect) {
         VisibleSelection newSelection;
         Element* URLElement = result.hitTestResult().URLElement();
-        VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
+        VisiblePosition pos(renderer->positionForPoint(result.localPoint()));
         if (pos.isNotNull() && pos.deepEquivalent().deprecatedNode()->isDescendantOf(URLElement))
             newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
 
         updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity);
     }
 }
 
 bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
 {
     if (event.event().button() != LeftButton)
@@ skipping 11 matching lines @@
 
     return true;
 }
 
 bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)
 {
     if (event.event().button() != LeftButton)
         return false;
 
     Node* innerNode = event.targetNode();
-    if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+    RenderObject* renderer = event.hitTestResult().renderer();
+    if (!(innerNode && renderer && m_mouseDownMayStartSelect))
         return false;
 
     VisibleSelection newSelection;
-    VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));
+    VisiblePosition pos(renderer->positionForPoint(event.localPoint()));
     if (pos.isNotNull()) {
         newSelection = VisibleSelection(pos);
         newSelection.expandUsingGranularity(ParagraphGranularity);
     }
 
     return updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), ParagraphGranularity);
 }
 
 static int textDistance(const Position& start, const Position& end)
 {
      RefPtr<Range> range = Range::create(start.anchorNode()->document(), start, end);
      return TextIterator::rangeLength(range.get(), true);
 }
 
 bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)
 {
     m_frame->document()->updateLayoutIgnorePendingStylesheets();
     Node* innerNode = event.targetNode();
-    if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
+    RenderObject* renderer = event.hitTestResult().renderer();
+    if (!(innerNode && renderer && m_mouseDownMayStartSelect))
         return false;
 
     // Extend the selection if the Shift key is down, unless the click is in a link.
     bool extendSelection = event.event().shiftKey() && !event.isOverLink();
 
     // Don't restart the selection when the mouse is pressed on an
     // existing selection so we can allow for text dragging.
     if (FrameView* view = m_frame->view()) {
         LayoutPoint vPoint = view->windowToContents(event.event().position());
         if (!extendSelection && m_frame->selection()->contains(vPoint)) {
             m_mouseDownWasSingleClickInSelection = true;
             return false;
         }
     }
 
-    VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
+    VisiblePosition visiblePos(renderer->positionForPoint(event.localPoint()));
     if (visiblePos.isNull())
         visiblePos = VisiblePosition(firstPositionInOrBeforeNode(innerNode), DOWNSTREAM);
     Position pos = visiblePos.deepEquivalent();
 
     VisibleSelection newSelection = m_frame->selection()->selection();
     TextGranularity granularity = CharacterGranularity;
 
     if (extendSelection && newSelection.isCaretOrRange()) {
         VisibleSelection selectionInUserSelectAll = expandSelectionToRespectUserSelectAll(innerNode, VisibleSelection(pos));
         if (selectionInUserSelectAll.isRange()) {
@@ skipping 109 matching lines @@
     if (!m_mousePressed)
         return false;
 
     if (handleDrag(event, ShouldCheckDragHysteresis))
         return true;
 
     Node* targetNode = event.targetNode();
     if (event.event().button() != LeftButton || !targetNode)
         return false;
 
-    RenderObject* renderer = targetNode->renderer();
+    RenderObject* renderer = event.hitTestResult().renderer();
     if (!renderer) {
         Node* parent = EventPathWalker::parent(targetNode);
         if (!parent)
             return false;
 
         renderer = parent->renderer();
         if (!renderer || !renderer->isListBox())
             return false;
     }
 
@@ skipping 34 matching lines @@
 
 void EventHandler::updateSelectionForMouseDrag(const HitTestResult& hitTestResult)
 {
     if (!m_mouseDownMayStartSelect)
         return;
 
     Node* target = hitTestResult.targetNode();
     if (!target)
         return;
 
+    RenderObject* targetRenderer = hitTestResult.renderer();
     VisiblePosition targetPosition = m_frame->selection()->selection().visiblePositionRespectingEditingBoundary(hitTestResult.localPoint(), target);
     // Don't modify the selection if we're not on a node.
     if (targetPosition.isNull())
         return;
 
     // Restart the selection if this is the first mouse move. This work is usually
     // done in handleMousePressEvent, but not if the mouse press was on an existing selection.
     VisibleSelection newSelection = m_frame->selection()->selection();
 
     // Special case to limit selection to the containing block for SVG text.
     // FIXME: Isn't there a better non-SVG-specific way to do this?
     if (Node* selectionBaseNode = newSelection.base().deprecatedNode())
         if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer())
             if (selectionBaseRenderer->isSVGText())
-                if (target->renderer()->containingBlock() != selectionBaseRenderer->containingBlock())
+                if (targetRenderer->containingBlock() != selectionBaseRenderer->containingBlock())
                     return;
 
     if (m_selectionInitiationState == HaveNotStartedSelection && !dispatchSelectStart(target))
         return;
 
     if (m_selectionInitiationState != ExtendedSelection) {
         // Always extend selection here because it's caused by a mouse drag
         m_selectionInitiationState = ExtendedSelection;
         newSelection = VisibleSelection(targetPosition);
     }
 
 #if ENABLE(USERSELECT_ALL)
     Node* rootUserSelectAllForMousePressNode = Position::rootUserSelectAllForNode(m_mousePressNode.get());
     if (rootUserSelectAllForMousePressNode && rootUserSelectAllForMousePressNode == Position::rootUserSelectAllForNode(target)) {
         newSelection.setBase(positionBeforeNode(rootUserSelectAllForMousePressNode).upstream(CanCrossEditingBoundary));
         newSelection.setExtent(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));
     } else {
         // Reset base for user select all when base is inside user-select-all area and extent < base.
-        if (rootUserSelectAllForMousePressNode && comparePositions(target->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
+        if (rootUserSelectAllForMousePressNode && comparePositions(targetRenderer->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
             newSelection.setBase(positionAfterNode(rootUserSelectAllForMousePressNode).downstream(CanCrossEditingBoundary));
 
         Node* rootUserSelectAllForTarget = Position::rootUserSelectAllForNode(target);
-        if (rootUserSelectAllForTarget && m_mousePressNode->renderer() && comparePositions(target->renderer()->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
+        if (rootUserSelectAllForTarget && m_mousePressNode->renderer() && comparePositions(targetRenderer->positionForPoint(hitTestResult.localPoint()), m_mousePressNode->renderer()->positionForPoint(m_dragStartPos)) < 0)
             newSelection.setExtent(positionBeforeNode(rootUserSelectAllForTarget).upstream(CanCrossEditingBoundary));
         else if (rootUserSelectAllForTarget && m_mousePressNode->renderer())
             newSelection.setExtent(positionAfterNode(rootUserSelectAllForTarget).downstream(CanCrossEditingBoundary));
         else
             newSelection.setExtent(targetPosition);
     }
 #else
     newSelection.setExtent(targetPosition);
 #endif
 
@@ skipping 42 matching lines @@
     // Clear the selection if the mouse didn't move after the last mouse
     // press and it's not a context menu click.  We do this so when clicking
     // on the selection, the selection goes away.  However, if we are
     // editing, place the caret.
     if (m_mouseDownWasSingleClickInSelection && m_selectionInitiationState != ExtendedSelection
             && m_dragStartPos == event.event().position()
             && m_frame->selection()->isRange()
             && event.event().button() != RightButton) {
         VisibleSelection newSelection;
         Node* node = event.targetNode();
+        RenderObject* renderer = event.hitTestResult().renderer();
         bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled();
-        if (node && (caretBrowsing || node->rendererIsEditable()) && node->renderer()) {
-            VisiblePosition pos = VisiblePosition(node->renderer()->positionForPoint(event.localPoint()));
-            newSelection = VisibleSelection(pos);
-        }
+        if (node && (caretBrowsing || node->rendererIsEditable()) && renderer)
+            newSelection = VisibleSelection(VisiblePosition(renderer->positionForPoint(event.localPoint())));
 
         setSelectionIfNeeded(m_frame->selection(), newSelection);
 
         handled = true;
     }
 
     m_frame->selection()->notifyRendererOfSelectionChange(UserTriggered);
 
     m_frame->selection()->selectFrameElementInParentIfFullySelected();
 
@@ skipping 247 matching lines @@
 
     Page* page = m_frame->page();
     if (!page)
         return NoCursorChange;
 #if OS(WINDOWS)
     if (panScrollInProgress())
         return NoCursorChange;
 #endif
 
     Node* node = event.targetNode();
-    RenderObject* renderer = node ? node->renderer() : 0;
+    RenderObject* renderer = event.hitTestResult().renderer();
     RenderStyle* style = renderer ? renderer->style() : 0;
     bool horizontalText = !style || style->isHorizontalWritingMode();
     const Cursor& iBeam = horizontalText ? iBeamCursor() : verticalTextCursor();
 
     // During selection, use an I-beam no matter what we're over.
     // If a drag may be starting or we're capturing mouse events for a particular node, don't treat this as a selection.
     if (m_mousePressed && m_mouseDownMayStartSelect
         && !m_mouseDownMayStartDrag
         && m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode)
         return iBeam;
@@ skipping 206 matching lines @@
     if (isPanScrollInProgress) {
         // We invalidate the click when exiting pan scrolling so that we don't inadvertently navigate
         // away from the current page (e.g. the click was on a hyperlink). See <rdar://problem/6095023>.
         invalidateClick();
         return true;
     }
 #endif
 
     m_clickCount = mouseEvent.clickCount();
     m_clickNode = mev.targetNode();
+    RenderObject* clickRenderer = mev.hitTestResult().renderer();
 
     if (FrameView* view = m_frame->view()) {
-        RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;
+        RenderLayer* layer = clickRenderer ? clickRenderer->enclosingLayer() : 0;
         IntPoint p = view->windowToContents(mouseEvent.position());
         if (layer && layer->isPointInResizeControl(p, RenderLayer::ResizerForPointer)) {
             layer->setInResizeMode(true);
             m_resizeLayer = layer;
             m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);
             invalidateClick();
             return true;
         }
     }
 
@@ skipping 2451 matching lines @@
     // the event via an EventTargetNode dispatch when this returns false.
     if (!widget->isFrameView())
         return false;
 
     return toFrameView(widget)->frame()->eventHandler()->handleWheelEvent(wheelEvent);
 }
 
 bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults& event)
 {
     // Figure out which view to send the event to.
-    if (!event.targetNode() || !event.targetNode()->renderer() || !event.targetNode()->renderer()->isWidget())
+    if (!event.targetNode() || !event.hitTestResult().renderer() || !event.hitTestResult().renderer()->isWidget())
         return false;
     return false;
 }
 
 PassRefPtr<Clipboard> EventHandler::createDraggingClipboard() const
 {
     RefPtr<ChromiumDataObject> dataObject = ChromiumDataObject::create();
     return ClipboardChromium::create(Clipboard::DragAndDrop, dataObject.get(), ClipboardWritable, m_frame);
 }
 
 void EventHandler::focusDocumentView()
 {
     Page* page = m_frame->page();
     if (!page)
         return;
     page->focusController()->setFocusedFrame(m_frame);
 }
 
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(DARWIN)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore