Implement select element list box with shadow DOM.

Source/WebCore/html/HTMLSelectElement.cpp

Index: Source/WebCore/html/HTMLSelectElement.cpp
diff --git a/Source/WebCore/html/HTMLSelectElement.cpp b/Source/WebCore/html/HTMLSelectElement.cpp
index e51408a387b6da97b5073a57cd3d6d61c4df28f7..27e2db4e002804b828f08b6a66e1a2b9534e535a 100644
--- a/Source/WebCore/html/HTMLSelectElement.cpp
+++ b/Source/WebCore/html/HTMLSelectElement.cpp
@@ -674,9 +674,13 @@ void HTMLSelectElement::scrollToSelection()
 {
     if (usesMenuList())
         return;
-
-    if (RenderObject* renderer = this->renderer())
-        toRenderListBox(renderer)->selectionChanged();
+    int listIndex = activeSelectionEndListIndex();
+    const Vector<HTMLElement*>& items = listItems();
+    int listSize = static_cast<int>(items.size());
+    if (listIndex < 0 || listIndex >= listSize)
+        return;
+    Element* option = listItems()[listIndex];
+    option->scrollIntoViewIfNeeded(false);
 }
 
 void HTMLSelectElement::setOptionsChangedOnRenderer()
@@ -684,8 +688,8 @@ void HTMLSelectElement::setOptionsChangedOnRenderer()
     if (RenderObject* renderer = this->renderer()) {
         if (usesMenuList())
             toRenderMenuList(renderer)->setOptionsChanged(true);
-        else
-            toRenderListBox(renderer)->setOptionsChanged(true);
+//        else
+//            scrollToSelection();
     }
 }
 
@@ -859,8 +863,6 @@ void HTMLSelectElement::selectOption(int optionIndex, SelectOptionFlags flags)
         if (RenderObject* renderer = this->renderer()) {
             if (usesMenuList())
                 toRenderMenuList(renderer)->didSetSelectedIndex(listIndex);
-            else if (renderer->isListBox())
-                toRenderListBox(renderer)->selectionChanged();
         }
     }
 
@@ -1284,6 +1286,22 @@ void HTMLSelectElement::updateSelectedState(int listIndex, bool multi, bool shif
     updateListBoxSelection(!multiSelect);
 }
 
+int HTMLSelectElement::listIndexForEvent(Event* event)
+{
+    const Vector<HTMLElement*>& items = this->listItems();
+    for (Node* node = event->target()->toNode(); node; node = node->parentOrShadowHostNode()) {
+        if (node->isElementNode() && (toElement(node)->hasTagName(optionTag) || toElement(node)->hasTagName(optgroupTag))) {
+            size_t length = items.size();
+            for (size_t i = 0; i < length; ++i) {
+                if (items[i] == node) {
+                    return i;
+                }
+            }
+        }
+    }
+    return -1;
+}
+
 void HTMLSelectElement::listBoxDefaultEventHandler(Event* event)
 {
     const Vector<HTMLElement*>& listItems = this->listItems();
@@ -1294,10 +1312,8 @@ void HTMLSelectElement::listBoxDefaultEventHandler(Event* event)
         if (!renderer())
             return;
 
-        // Convert to coords relative to the list box if needed.
         MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
-        IntPoint localOffset = roundedIntPoint(renderer()->absoluteToLocal(mouseEvent->absoluteLocation(), UseTransforms));
-        int listIndex = toRenderListBox(renderer())->listIndexAtOffset(toIntSize(localOffset));
+        int listIndex = listIndexForEvent(event);
         if (listIndex >= 0) {
             if (!isDisabledFormControl()) {
 #if OS(DARWIN)
@@ -1311,13 +1327,12 @@ void HTMLSelectElement::listBoxDefaultEventHandler(Event* event)
 
             event->setDefaultHandled();
         }
-    } else if (event->type() == eventNames().mousemoveEvent && event->isMouseEvent() && !toRenderBox(renderer())->canBeScrolledAndHasScrollableArea()) {
+    } else if (event->type() == eventNames().mousemoveEvent && event->isMouseEvent()) {
         MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
         if (mouseEvent->button() != LeftButton || !mouseEvent->buttonDown())
             return;
 
-        IntPoint localOffset = roundedIntPoint(renderer()->absoluteToLocal(mouseEvent->absoluteLocation(), UseTransforms));
-        int listIndex = toRenderListBox(renderer())->listIndexAtOffset(toIntSize(localOffset));
+        int listIndex = listIndexForEvent(event);
         if (listIndex >= 0) {
             if (!isDisabledFormControl()) {
                 if (m_multiple) {
@@ -1335,12 +1350,9 @@ void HTMLSelectElement::listBoxDefaultEventHandler(Event* event)
             }
             event->setDefaultHandled();
         }
-    } else if (event->type() == eventNames().mouseupEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton && document()->frame()->eventHandler()->autoscrollRenderer() != renderer()) {
-        // This makes sure we fire dispatchFormControlChangeEvent for a single
-        // click. For drag selection, onChange will fire when the autoscroll
-        // timer stops.
+    } else if (event->type() == eventNames().mouseupEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton)
         listBoxOnChange();
-    } else if (event->type() == eventNames().keydownEvent) {
+    else if (event->type() == eventNames().keydownEvent) {
         if (!event->isKeyboardEvent())
             return;
         const String& keyIdentifier = static_cast<KeyboardEvent*>(event)->keyIdentifier();
@@ -1414,7 +1426,7 @@ void HTMLSelectElement::listBoxDefaultEventHandler(Event* event)
                 setActiveSelectionAnchorIndex(m_activeSelectionEndIndex);
             }
 
-            toRenderListBox(renderer())->scrollToRevealElementAtListIndex(endIndex);
+            listItems[endIndex]->scrollIntoViewIfNeeded(false);
             if (selectNewItem) {
                 updateListBoxSelection(deselectOthers);
                 listBoxOnChange();