diff -r 000000000000 -r 4f2f89ce4247 WebCore/dom/SelectElement.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/SelectElement.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,995 @@
+/*
+ * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "SelectElement.h"
+
+#include "Attribute.h"
+#include "CharacterNames.h"
+#include "Chrome.h"
+#include "ChromeClient.h"
+#include "Element.h"
+#include "EventHandler.h"
+#include "EventNames.h"
+#include "FormDataList.h"
+#include "Frame.h"
+#include "HTMLFormElement.h"
+#include "HTMLKeygenElement.h"
+#include "HTMLNames.h"
+#include "HTMLSelectElement.h"
+#include "KeyboardEvent.h"
+#include "MouseEvent.h"
+#include "OptionElement.h"
+#include "OptionGroupElement.h"
+#include "Page.h"
+#include "RenderListBox.h"
+#include "RenderMenuList.h"
+#include <wtf/Assertions.h>
+
+#if ENABLE(WML)
+#include "WMLNames.h"
+#include "WMLSelectElement.h"
+#endif
+
+// Configure platform-specific behavior when focused pop-up receives arrow/space/return keystroke.
+// (PLATFORM(MAC) and PLATFORM(GTK) are always false in Chromium, hence the extra tests.)
+#if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN))
+#define ARROW_KEYS_POP_MENU 1
+#define SPACE_OR_RETURN_POP_MENU 0
+#elif PLATFORM(GTK) || (PLATFORM(CHROMIUM) && OS(LINUX))
+#define ARROW_KEYS_POP_MENU 0
+#define SPACE_OR_RETURN_POP_MENU 1
+#else
+#define ARROW_KEYS_POP_MENU 0
+#define SPACE_OR_RETURN_POP_MENU 0
+#endif
+
+using std::min;
+using std::max;
+using namespace WTF;
+using namespace Unicode;
+
+namespace WebCore {
+
+static const DOMTimeStamp typeAheadTimeout = 1000;
+
+void SelectElement::selectAll(SelectElementData& data, Element* element)
+{
+    ASSERT(!data.usesMenuList());
+    if (!element->renderer() || !data.multiple())
+        return;
+
+    // Save the selection so it can be compared to the new selectAll selection when dispatching change events
+    saveLastSelection(data, element);
+
+    data.setActiveSelectionState(true);
+    setActiveSelectionAnchorIndex(data, element, nextSelectableListIndex(data, element, -1));
+    setActiveSelectionEndIndex(data, previousSelectableListIndex(data, element, -1));
+
+    updateListBoxSelection(data, element, false);
+    listBoxOnChange(data, element);
+}
+
+void SelectElement::saveLastSelection(SelectElementData& data, Element* element)
+{
+    if (data.usesMenuList()) {
+        data.setLastOnChangeIndex(selectedIndex(data, element));
+        return;
+    }
+
+    Vector<bool>& lastOnChangeSelection = data.lastOnChangeSelection(); 
+    lastOnChangeSelection.clear();
+
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        lastOnChangeSelection.append(optionElement && optionElement->selected());
+    }
+}
+
+int SelectElement::nextSelectableListIndex(SelectElementData& data, Element* element, int startIndex)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    int index = startIndex + 1;
+    while (index >= 0 && (unsigned) index < items.size() && (!isOptionElement(items[index]) || items[index]->disabled()))
+        ++index;
+    if ((unsigned) index == items.size())
+        return startIndex;
+    return index;
+}
+
+int SelectElement::previousSelectableListIndex(SelectElementData& data, Element* element, int startIndex)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    if (startIndex == -1)
+        startIndex = items.size();
+    int index = startIndex - 1;
+    while (index >= 0 && (unsigned) index < items.size() && (!isOptionElement(items[index]) || items[index]->disabled()))
+        --index;
+    if (index == -1)
+        return startIndex;
+    return index;
+}
+
+void SelectElement::setActiveSelectionAnchorIndex(SelectElementData& data, Element* element, int index)
+{
+    data.setActiveSelectionAnchorIndex(index);
+
+    // Cache the selection state so we can restore the old selection as the new selection pivots around this anchor index
+    Vector<bool>& cachedStateForActiveSelection = data.cachedStateForActiveSelection(); 
+    cachedStateForActiveSelection.clear();
+
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        cachedStateForActiveSelection.append(optionElement && optionElement->selected());
+    }
+}
+
+void SelectElement::setActiveSelectionEndIndex(SelectElementData& data, int index)
+{
+    data.setActiveSelectionEndIndex(index);
+}
+
+void SelectElement::updateListBoxSelection(SelectElementData& data, Element* element, bool deselectOtherOptions)
+{
+    ASSERT(element->renderer() && (element->renderer()->isListBox() || data.multiple()));
+    ASSERT(data.activeSelectionAnchorIndex() >= 0);
+
+    unsigned start = min(data.activeSelectionAnchorIndex(), data.activeSelectionEndIndex());
+    unsigned end = max(data.activeSelectionAnchorIndex(), data.activeSelectionEndIndex());
+    Vector<bool>& cachedStateForActiveSelection = data.cachedStateForActiveSelection();
+
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        if (!optionElement || items[i]->disabled())
+            continue;
+
+        if (i >= start && i <= end)
+            optionElement->setSelectedState(data.activeSelectionState());
+        else if (deselectOtherOptions || i >= cachedStateForActiveSelection.size())
+            optionElement->setSelectedState(false);
+        else
+            optionElement->setSelectedState(cachedStateForActiveSelection[i]);
+    }
+
+    scrollToSelection(data, element);
+}
+
+void SelectElement::listBoxOnChange(SelectElementData& data, Element* element)
+{
+    ASSERT(!data.usesMenuList() || data.multiple());
+
+    Vector<bool>& lastOnChangeSelection = data.lastOnChangeSelection(); 
+    const Vector<Element*>& items = data.listItems(element);
+
+    // If the cached selection list is empty, or the size has changed, then fire dispatchFormControlChangeEvent, and return early.
+    if (lastOnChangeSelection.isEmpty() || lastOnChangeSelection.size() != items.size()) {
+        element->dispatchFormControlChangeEvent();
+        return;
+    }
+
+    // Update lastOnChangeSelection and fire dispatchFormControlChangeEvent
+    bool fireOnChange = false;
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        bool selected = optionElement &&  optionElement->selected();
+        if (selected != lastOnChangeSelection[i])
+            fireOnChange = true;
+        lastOnChangeSelection[i] = selected;
+    }
+
+    if (fireOnChange)
+        element->dispatchFormControlChangeEvent();
+}
+
+void SelectElement::menuListOnChange(SelectElementData& data, Element* element)
+{
+    ASSERT(data.usesMenuList());
+
+    int selected = selectedIndex(data, element);
+    if (data.lastOnChangeIndex() != selected && data.userDrivenChange()) {
+        data.setLastOnChangeIndex(selected);
+        data.setUserDrivenChange(false);
+        element->dispatchFormControlChangeEvent();
+    }
+}
+
+void SelectElement::scrollToSelection(SelectElementData& data, Element* element)
+{
+    if (data.usesMenuList())
+        return;
+
+    if (RenderObject* renderer = element->renderer())
+        toRenderListBox(renderer)->selectionChanged();
+}
+
+void SelectElement::setOptionsChangedOnRenderer(SelectElementData& data, Element* element)
+{
+    if (RenderObject* renderer = element->renderer()) {
+        if (data.usesMenuList())
+            toRenderMenuList(renderer)->setOptionsChanged(true);
+        else
+            toRenderListBox(renderer)->setOptionsChanged(true);
+    }
+}
+
+void SelectElement::setRecalcListItems(SelectElementData& data, Element* element)
+{
+    data.setShouldRecalcListItems(true);
+    data.setActiveSelectionAnchorIndex(-1); // Manual selection anchor is reset when manipulating the select programmatically.
+    setOptionsChangedOnRenderer(data, element);
+    element->setNeedsStyleRecalc();
+}
+
+void SelectElement::recalcListItems(SelectElementData& data, const Element* element, bool updateSelectedStates)
+{
+    Vector<Element*>& listItems = data.rawListItems();
+    listItems.clear();
+
+    data.setShouldRecalcListItems(false);
+
+    OptionElement* foundSelected = 0;
+    for (Node* currentNode = element->firstChild(); currentNode;) {
+        if (!currentNode->isElementNode()) {
+            currentNode = currentNode->traverseNextSibling(element);
+            continue;
+        }
+
+        Element* current = static_cast<Element*>(currentNode);
+
+        // optgroup tags may not nest. However, both FireFox and IE will
+        // flatten the tree automatically, so we follow suit.
+        // (http://www.w3.org/TR/html401/interact/forms.html#h-17.6)
+        if (isOptionGroupElement(current)) {
+            listItems.append(current);
+            if (current->firstChild()) {
+                currentNode = current->firstChild();
+                continue;
+            }
+        }
+
+        if (OptionElement* optionElement = toOptionElement(current)) {
+            listItems.append(current);
+
+            if (updateSelectedStates && !data.multiple()) {
+                if (!foundSelected && (data.size() <= 1 || optionElement->selected())) {
+                    foundSelected = optionElement;
+                    foundSelected->setSelectedState(true);
+                } else if (foundSelected && optionElement->selected()) {
+                    foundSelected->setSelectedState(false);
+                    foundSelected = optionElement;
+                }
+            }
+        }
+
+        if (current->hasTagName(HTMLNames::hrTag))
+            listItems.append(current);
+
+        // In conforming HTML code, only <optgroup> and <option> will be found
+        // within a <select>. We call traverseNextSibling so that we only step
+        // into those tags that we choose to. For web-compat, we should cope
+        // with the case where odd tags like a <div> have been added but we
+        // handle this because such tags have already been removed from the
+        // <select>'s subtree at this point.
+        currentNode = currentNode->traverseNextSibling(element);
+    }
+}
+
+int SelectElement::selectedIndex(const SelectElementData& data, const Element* element)
+{
+    unsigned index = 0;
+
+    // return the number of the first option selected
+    const Vector<Element*>& items = data.listItems(element);
+    for (size_t i = 0; i < items.size(); ++i) {
+        if (OptionElement* optionElement = toOptionElement(items[i])) {
+            if (optionElement->selected())
+                return index;
+            ++index;
+        }
+    }
+
+    return -1;
+}
+
+void SelectElement::setSelectedIndex(SelectElementData& data, Element* element, int optionIndex, bool deselect, bool fireOnChangeNow, bool userDrivenChange)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    int listIndex = optionToListIndex(data, element, optionIndex);
+    if (!data.multiple())
+        deselect = true;
+
+    Element* excludeElement = 0;
+    if (OptionElement* optionElement = (listIndex >= 0 ? toOptionElement(items[listIndex]) : 0)) {
+        excludeElement = items[listIndex];
+        if (data.activeSelectionAnchorIndex() < 0 || deselect)
+            setActiveSelectionAnchorIndex(data, element, listIndex);
+        if (data.activeSelectionEndIndex() < 0 || deselect)
+            setActiveSelectionEndIndex(data, listIndex);
+        optionElement->setSelectedState(true);
+    }
+
+    if (deselect)
+        deselectItems(data, element, excludeElement);
+
+    // For the menu list case, this is what makes the selected element appear.
+    if (RenderObject* renderer = element->renderer())
+        renderer->updateFromElement();
+
+    scrollToSelection(data, element);
+
+    // This only gets called with fireOnChangeNow for menu lists. 
+    if (data.usesMenuList()) {
+        data.setUserDrivenChange(userDrivenChange);
+        if (fireOnChangeNow)
+            menuListOnChange(data, element);
+        RenderObject* renderer = element->renderer();
+        if (renderer) {
+            if (data.usesMenuList())
+                toRenderMenuList(renderer)->didSetSelectedIndex();
+            else if (renderer->isListBox())
+                toRenderListBox(renderer)->selectionChanged();
+        }
+    }
+
+    if (Frame* frame = element->document()->frame())
+        frame->page()->chrome()->client()->formStateDidChange(element);
+}
+
+int SelectElement::optionToListIndex(const SelectElementData& data, const Element* element, int optionIndex)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    int listSize = (int) items.size();
+    if (optionIndex < 0 || optionIndex >= listSize)
+        return -1;
+
+    int optionIndex2 = -1;
+    for (int listIndex = 0; listIndex < listSize; ++listIndex) {
+        if (isOptionElement(items[listIndex])) {
+            ++optionIndex2;
+            if (optionIndex2 == optionIndex)
+                return listIndex;
+        }
+    }
+
+    return -1;
+}
+
+int SelectElement::listToOptionIndex(const SelectElementData& data, const Element* element, int listIndex)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    if (listIndex < 0 || listIndex >= int(items.size()) ||
+        !isOptionElement(items[listIndex]))
+        return -1;
+
+    int optionIndex = 0; // actual index of option not counting OPTGROUP entries that may be in list
+    for (int i = 0; i < listIndex; ++i)
+        if (isOptionElement(items[i]))
+            ++optionIndex;
+
+    return optionIndex;
+}
+
+void SelectElement::dispatchFocusEvent(SelectElementData& data, Element* element)
+{
+    // Save the selection so it can be compared to the new selection when dispatching change events during blur event dispatchal
+    if (data.usesMenuList())
+        saveLastSelection(data, element);
+}
+
+void SelectElement::dispatchBlurEvent(SelectElementData& data, Element* element)
+{
+    // We only need to fire change events here for menu lists, because we fire change events for list boxes whenever the selection change is actually made.
+    // This matches other browsers' behavior.
+    if (data.usesMenuList())
+        menuListOnChange(data, element);
+}
+
+void SelectElement::deselectItems(SelectElementData& data, Element* element, Element* excludeElement)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        if (items[i] == excludeElement)
+            continue;
+
+        if (OptionElement* optionElement = toOptionElement(items[i]))
+            optionElement->setSelectedState(false);
+    }
+}
+
+bool SelectElement::saveFormControlState(const SelectElementData& data, const Element* element, String& value)
+{
+    const Vector<Element*>& items = data.listItems(element);
+    int length = items.size();
+
+    // FIXME: Change this code to use the new StringImpl::createUninitialized code path.
+    Vector<char, 1024> characters(length);
+    for (int i = 0; i < length; ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        bool selected = optionElement && optionElement->selected();
+        characters[i] = selected ? 'X' : '.';
+    }
+
+    value = String(characters.data(), length);
+    return true;
+}
+
+void SelectElement::restoreFormControlState(SelectElementData& data, Element* element, const String& state)
+{
+    recalcListItems(data, element);
+
+    const Vector<Element*>& items = data.listItems(element);
+    int length = items.size();
+
+    for (int i = 0; i < length; ++i) {
+        if (OptionElement* optionElement = toOptionElement(items[i]))
+            optionElement->setSelectedState(state[i] == 'X');
+    }
+
+    setOptionsChangedOnRenderer(data, element);
+}
+
+void SelectElement::parseMultipleAttribute(SelectElementData& data, Element* element, Attribute* attribute)
+{
+    bool oldUsesMenuList = data.usesMenuList();
+    data.setMultiple(!attribute->isNull());
+    if (oldUsesMenuList != data.usesMenuList() && element->attached()) {
+        element->detach();
+        element->attach();
+    }
+}
+
+bool SelectElement::appendFormData(SelectElementData& data, Element* element, FormDataList& list)
+{
+    const AtomicString& name = element->formControlName();
+    if (name.isEmpty())
+        return false;
+
+    bool successful = false;
+    const Vector<Element*>& items = data.listItems(element);
+
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        if (optionElement && optionElement->selected() && !optionElement->disabled()) {
+            list.appendData(name, optionElement->value());
+            successful = true;
+        }
+    }
+
+    // It's possible that this is a menulist with multiple options and nothing
+    // will be submitted (!successful). We won't send a unselected non-disabled
+    // option as fallback. This behavior matches to other browsers.
+    return successful;
+} 
+
+void SelectElement::reset(SelectElementData& data, Element* element)
+{
+    OptionElement* firstOption = 0;
+    OptionElement* selectedOption = 0;
+
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        OptionElement* optionElement = toOptionElement(items[i]);
+        if (!optionElement)
+            continue;
+
+        if (!items[i]->getAttribute(HTMLNames::selectedAttr).isNull()) {
+            if (selectedOption && !data.multiple())
+                selectedOption->setSelectedState(false);
+            optionElement->setSelectedState(true);
+            selectedOption = optionElement;
+        } else
+            optionElement->setSelectedState(false);
+
+        if (!firstOption)
+            firstOption = optionElement;
+    }
+
+    if (!selectedOption && firstOption && !data.multiple() && data.size() <= 1)
+        firstOption->setSelectedState(true);
+
+    setOptionsChangedOnRenderer(data, element);
+    element->setNeedsStyleRecalc();
+}
+    
+#if !ARROW_KEYS_POP_MENU
+enum SkipDirection {
+    SkipBackwards = -1,
+    SkipForwards = 1
+};
+
+// Returns the index of the next valid list item |skip| items past |listIndex| in direction |direction|.
+static int nextValidIndex(const Vector<Element*>& listItems, int listIndex, SkipDirection direction, int skip)
+{
+    int lastGoodIndex = listIndex;
+    int size = listItems.size();
+    for (listIndex += direction; listIndex >= 0 && listIndex < size; listIndex += direction) {
+        --skip;
+        if (!listItems[listIndex]->disabled() && isOptionElement(listItems[listIndex])) {
+            lastGoodIndex = listIndex;
+            if (skip <= 0)
+                break;
+        }
+    }
+    return lastGoodIndex;
+}
+#endif
+
+void SelectElement::menuListDefaultEventHandler(SelectElementData& data, Element* element, Event* event, HTMLFormElement* htmlForm)
+{
+    if (event->type() == eventNames().keydownEvent) {
+        if (!element->renderer() || !event->isKeyboardEvent())
+            return;
+
+        String keyIdentifier = static_cast<KeyboardEvent*>(event)->keyIdentifier();
+        bool handled = false;
+
+#if ARROW_KEYS_POP_MENU
+        if (keyIdentifier == "Down" || keyIdentifier == "Up") {
+            element->focus();
+            // Save the selection so it can be compared to the new selection when dispatching change events during setSelectedIndex,
+            // which gets called from RenderMenuList::valueChanged, which gets called after the user makes a selection from the menu.
+            saveLastSelection(data, element);
+            if (RenderMenuList* menuList = toRenderMenuList(element->renderer()))
+                menuList->showPopup();
+            handled = true;
+        }
+#else
+        const Vector<Element*>& listItems = data.listItems(element);
+
+        int listIndex = optionToListIndex(data, element, selectedIndex(data, element));
+        if (keyIdentifier == "Down" || keyIdentifier == "Right") {
+            listIndex = nextValidIndex(listItems, listIndex, SkipForwards, 1);
+            handled = true;
+        } else if (keyIdentifier == "Up" || keyIdentifier == "Left") {
+            listIndex = nextValidIndex(listItems, listIndex, SkipBackwards, 1);
+            handled = true;
+        } else if (keyIdentifier == "PageDown") {
+            listIndex = nextValidIndex(listItems, listIndex, SkipForwards, 3);
+            handled = true;
+        } else if (keyIdentifier == "PageUp") {
+            listIndex = nextValidIndex(listItems, listIndex, SkipBackwards, 3);
+            handled = true;
+        } else if (keyIdentifier == "Home") {
+            listIndex = nextValidIndex(listItems, -1, SkipForwards, 1);
+            handled = true;
+        } else if (keyIdentifier == "End") {
+            listIndex = nextValidIndex(listItems, listItems.size(), SkipBackwards, 1);
+            handled = true;
+        }
+        
+        if (handled && listIndex >= 0 && (unsigned)listIndex < listItems.size())
+            setSelectedIndex(data, element, listToOptionIndex(data, element, listIndex));
+#endif
+        if (handled)
+            event->setDefaultHandled();
+    }
+
+    // Use key press event here since sending simulated mouse events
+    // on key down blocks the proper sending of the key press event.
+    if (event->type() == eventNames().keypressEvent) {
+        if (!element->renderer() || !event->isKeyboardEvent())
+            return;
+
+        int keyCode = static_cast<KeyboardEvent*>(event)->keyCode();
+        bool handled = false;
+
+#if SPACE_OR_RETURN_POP_MENU
+        if (keyCode == ' ' || keyCode == '\r') {
+            element->focus();
+            // Save the selection so it can be compared to the new selection when dispatching change events during setSelectedIndex,
+            // which gets called from RenderMenuList::valueChanged, which gets called after the user makes a selection from the menu.
+            saveLastSelection(data, element);
+            if (RenderMenuList* menuList = toRenderMenuList(element->renderer()))
+                menuList->showPopup();
+            handled = true;
+        }
+#elif ARROW_KEYS_POP_MENU
+        if (keyCode == ' ') {
+            element->focus();
+            // Save the selection so it can be compared to the new selection when dispatching change events during setSelectedIndex,
+            // which gets called from RenderMenuList::valueChanged, which gets called after the user makes a selection from the menu.
+            saveLastSelection(data, element);
+            if (RenderMenuList* menuList = toRenderMenuList(element->renderer()))
+                menuList->showPopup();
+            handled = true;
+        } else if (keyCode == '\r') {
+            if (htmlForm)
+                htmlForm->submitImplicitly(event, false);
+            menuListOnChange(data, element);
+            handled = true;
+        }
+#else
+        int listIndex = optionToListIndex(data, element, selectedIndex(data, element));
+        if (keyCode == '\r') {
+            // listIndex should already be selected, but this will fire the onchange handler.
+            setSelectedIndex(data, element, listToOptionIndex(data, element, listIndex), true, true);
+            handled = true;
+        }
+#endif
+        if (handled)
+            event->setDefaultHandled();
+    }
+
+    if (event->type() == eventNames().mousedownEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton) {
+        element->focus();
+        if (element->renderer() && element->renderer()->isMenuList()) {
+            if (RenderMenuList* menuList = toRenderMenuList(element->renderer())) {
+                if (menuList->popupIsVisible())
+                    menuList->hidePopup();
+                else {
+                    // Save the selection so it can be compared to the new selection when we call onChange during setSelectedIndex,
+                    // which gets called from RenderMenuList::valueChanged, which gets called after the user makes a selection from the menu.
+                    saveLastSelection(data, element);
+                    menuList->showPopup();
+                }
+            }
+        }
+        event->setDefaultHandled();
+    }
+}
+
+void SelectElement::updateSelectedState(SelectElementData& data, Element* element, int listIndex,
+                                        bool multi, bool shift)
+{
+    ASSERT(listIndex >= 0);
+
+    // Save the selection so it can be compared to the new selection when dispatching change events during mouseup, or after autoscroll finishes.
+    saveLastSelection(data, element);
+
+    data.setActiveSelectionState(true);
+
+    bool shiftSelect = data.multiple() && shift;
+    bool multiSelect = data.multiple() && multi && !shift;
+
+    Element* clickedElement = data.listItems(element)[listIndex];
+    OptionElement* option = toOptionElement(clickedElement);
+    if (option) {
+        // Keep track of whether an active selection (like during drag selection), should select or deselect
+        if (option->selected() && multi)
+            data.setActiveSelectionState(false);
+
+        if (!data.activeSelectionState())
+            option->setSelectedState(false);
+    }
+
+    // If we're not in any special multiple selection mode, then deselect all other items, excluding the clicked option.
+    // If no option was clicked, then this will deselect all items in the list.
+    if (!shiftSelect && !multiSelect)
+        deselectItems(data, element, clickedElement);
+
+    // If the anchor hasn't been set, and we're doing a single selection or a shift selection, then initialize the anchor to the first selected index.
+    if (data.activeSelectionAnchorIndex() < 0 && !multiSelect)
+        setActiveSelectionAnchorIndex(data, element, selectedIndex(data, element));
+
+    // Set the selection state of the clicked option
+    if (option && !clickedElement->disabled())
+        option->setSelectedState(true);
+
+    // If there was no selectedIndex() for the previous initialization, or
+    // If we're doing a single selection, or a multiple selection (using cmd or ctrl), then initialize the anchor index to the listIndex that just got clicked.
+    if (data.activeSelectionAnchorIndex() < 0 || !shiftSelect)
+        setActiveSelectionAnchorIndex(data, element, listIndex);
+
+    setActiveSelectionEndIndex(data, listIndex);
+    updateListBoxSelection(data, element, !multiSelect);
+}
+
+void SelectElement::listBoxDefaultEventHandler(SelectElementData& data, Element* element, Event* event, HTMLFormElement* htmlForm)
+{
+    const Vector<Element*>& listItems = data.listItems(element);
+
+    if (event->type() == eventNames().mousedownEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton) {
+        element->focus();
+
+        // Convert to coords relative to the list box if needed.
+        MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
+        IntPoint localOffset = roundedIntPoint(element->renderer()->absoluteToLocal(mouseEvent->absoluteLocation(), false, true));
+        int listIndex = toRenderListBox(element->renderer())->listIndexAtOffset(localOffset.x(), localOffset.y());
+        if (listIndex >= 0) {
+#if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN))
+            updateSelectedState(data, element, listIndex, mouseEvent->metaKey(), mouseEvent->shiftKey());
+#else
+            updateSelectedState(data, element, listIndex, mouseEvent->ctrlKey(), mouseEvent->shiftKey());
+#endif
+            if (Frame* frame = element->document()->frame())
+                frame->eventHandler()->setMouseDownMayStartAutoscroll();
+
+            event->setDefaultHandled();
+        }
+    } else if (event->type() == eventNames().mouseupEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton && element->document()->frame()->eventHandler()->autoscrollRenderer() != element->renderer())
+        // This makes sure we fire dispatchFormControlChangeEvent for a single click.  For drag selection, onChange will fire when the autoscroll timer stops.
+        listBoxOnChange(data, element);
+    else if (event->type() == eventNames().keydownEvent) {
+        if (!event->isKeyboardEvent())
+            return;
+        String keyIdentifier = static_cast<KeyboardEvent*>(event)->keyIdentifier();
+
+        int endIndex = 0;        
+        if (data.activeSelectionEndIndex() < 0) {
+            // Initialize the end index
+            if (keyIdentifier == "Down")
+                endIndex = nextSelectableListIndex(data, element, lastSelectedListIndex(data, element));
+            else if (keyIdentifier == "Up")
+                endIndex = previousSelectableListIndex(data, element, optionToListIndex(data, element, selectedIndex(data, element)));
+        } else {
+            // Set the end index based on the current end index
+            if (keyIdentifier == "Down")
+                endIndex = nextSelectableListIndex(data, element, data.activeSelectionEndIndex());
+            else if (keyIdentifier == "Up")
+                endIndex = previousSelectableListIndex(data, element, data.activeSelectionEndIndex());    
+        }
+        
+        if (keyIdentifier == "Down" || keyIdentifier == "Up") {
+            // Save the selection so it can be compared to the new selection when dispatching change events immediately after making the new selection.
+            saveLastSelection(data, element);
+
+            ASSERT_UNUSED(listItems, endIndex >= 0 && (unsigned) endIndex < listItems.size());
+            setActiveSelectionEndIndex(data, endIndex);
+            
+            // If the anchor is unitialized, or if we're going to deselect all other options, then set the anchor index equal to the end index.
+            bool deselectOthers = !data.multiple() || !static_cast<KeyboardEvent*>(event)->shiftKey();
+            if (data.activeSelectionAnchorIndex() < 0 || deselectOthers) {
+                data.setActiveSelectionState(true);
+                if (deselectOthers)
+                    deselectItems(data, element);
+                setActiveSelectionAnchorIndex(data, element, data.activeSelectionEndIndex());
+            }
+
+            toRenderListBox(element->renderer())->scrollToRevealElementAtListIndex(endIndex);
+            updateListBoxSelection(data, element, deselectOthers);
+            listBoxOnChange(data, element);
+            event->setDefaultHandled();
+        }
+    } else if (event->type() == eventNames().keypressEvent) {
+        if (!event->isKeyboardEvent())
+            return;
+        int keyCode = static_cast<KeyboardEvent*>(event)->keyCode();
+
+        if (keyCode == '\r') {
+            if (htmlForm)
+                htmlForm->submitImplicitly(event, false);
+            event->setDefaultHandled();
+            return;
+        }
+    }
+}
+
+void SelectElement::defaultEventHandler(SelectElementData& data, Element* element, Event* event, HTMLFormElement* htmlForm)
+{
+    if (!element->renderer())
+        return;
+
+    if (data.usesMenuList())
+        menuListDefaultEventHandler(data, element, event, htmlForm);
+    else 
+        listBoxDefaultEventHandler(data, element, event, htmlForm);
+
+    if (event->defaultHandled())
+        return;
+
+    if (event->type() == eventNames().keypressEvent && event->isKeyboardEvent()) {
+        KeyboardEvent* keyboardEvent = static_cast<KeyboardEvent*>(event);
+        if (!keyboardEvent->ctrlKey() && !keyboardEvent->altKey() && !keyboardEvent->metaKey() && isPrintableChar(keyboardEvent->charCode())) {
+            typeAheadFind(data, element, keyboardEvent);
+            event->setDefaultHandled();
+            return;
+        }
+    }
+}
+
+int SelectElement::lastSelectedListIndex(const SelectElementData& data, const Element* element)
+{
+    // return the number of the last option selected
+    unsigned index = 0;
+    bool found = false;
+    const Vector<Element*>& items = data.listItems(element);
+    for (size_t i = 0; i < items.size(); ++i) {
+        if (OptionElement* optionElement = toOptionElement(items[i])) {
+            if (optionElement->selected()) {
+                index = i;
+                found = true;
+            }
+        }
+    }
+
+    return found ? (int) index : -1;
+}
+
+static String stripLeadingWhiteSpace(const String& string)
+{
+    int length = string.length();
+
+    int i;
+    for (i = 0; i < length; ++i) {
+        if (string[i] != noBreakSpace && (string[i] <= 0x7F ? !isASCIISpace(string[i]) : (direction(string[i]) != WhiteSpaceNeutral)))
+            break;
+    }
+
+    return string.substring(i, length - i);
+}
+
+void SelectElement::typeAheadFind(SelectElementData& data, Element* element, KeyboardEvent* event)
+{
+    if (event->timeStamp() < data.lastCharTime())
+        return;
+
+    DOMTimeStamp delta = event->timeStamp() - data.lastCharTime();
+    data.setLastCharTime(event->timeStamp());
+
+    UChar c = event->charCode();
+
+    String prefix;
+    int searchStartOffset = 1;
+    if (delta > typeAheadTimeout) {
+        prefix = String(&c, 1);
+        data.setTypedString(prefix);
+        data.setRepeatingChar(c);
+    } else {
+        data.typedString().append(c);
+
+        if (c == data.repeatingChar())
+            // The user is likely trying to cycle through all the items starting with this character, so just search on the character
+            prefix = String(&c, 1);
+        else {
+            data.setRepeatingChar(0);
+            prefix = data.typedString();
+            searchStartOffset = 0;
+        }
+    }
+
+    const Vector<Element*>& items = data.listItems(element);
+    int itemCount = items.size();
+    if (itemCount < 1)
+        return;
+
+    int selected = selectedIndex(data, element);
+    int index = (optionToListIndex(data, element, selected >= 0 ? selected : 0) + searchStartOffset) % itemCount;
+    ASSERT(index >= 0);
+
+    // Compute a case-folded copy of the prefix string before beginning the search for
+    // a matching element. This code uses foldCase to work around the fact that
+    // String::startWith does not fold non-ASCII characters. This code can be changed
+    // to use startWith once that is fixed.
+    String prefixWithCaseFolded(prefix.foldCase());
+    for (int i = 0; i < itemCount; ++i, index = (index + 1) % itemCount) {
+        OptionElement* optionElement = toOptionElement(items[index]);
+        if (!optionElement || items[index]->disabled())
+            continue;
+
+        // Fold the option string and check if its prefix is equal to the folded prefix.
+        String text = optionElement->textIndentedToRespectGroupLabel();
+        if (stripLeadingWhiteSpace(text).foldCase().startsWith(prefixWithCaseFolded)) {
+            setSelectedIndex(data, element, listToOptionIndex(data, element, index));
+            if (!data.usesMenuList())
+                listBoxOnChange(data, element);
+
+            setOptionsChangedOnRenderer(data, element);
+            element->setNeedsStyleRecalc();
+            return;
+        }
+    }
+}
+
+void SelectElement::insertedIntoTree(SelectElementData& data, Element* element)
+{
+    // When the element is created during document parsing, it won't have any items yet - but for innerHTML
+    // and related methods, this method is called after the whole subtree is constructed.
+    recalcListItems(data, element, true);
+}
+
+void SelectElement::accessKeySetSelectedIndex(SelectElementData& data, Element* element, int index)
+{    
+    // first bring into focus the list box
+    if (!element->focused())
+        element->accessKeyAction(false);
+    
+    // if this index is already selected, unselect. otherwise update the selected index
+    const Vector<Element*>& items = data.listItems(element);
+    int listIndex = optionToListIndex(data, element, index);
+    if (OptionElement* optionElement = (listIndex >= 0 ? toOptionElement(items[listIndex]) : 0)) {
+        if (optionElement->selected())
+            optionElement->setSelectedState(false);
+        else
+            setSelectedIndex(data, element, index, false, true);
+    }
+ 
+    listBoxOnChange(data, element);
+    scrollToSelection(data, element);
+}
+
+unsigned SelectElement::optionCount(const SelectElementData& data, const Element* element)
+{
+    unsigned options = 0;
+
+    const Vector<Element*>& items = data.listItems(element);
+    for (unsigned i = 0; i < items.size(); ++i) {
+        if (isOptionElement(items[i]))
+            ++options;
+    }
+
+    return options;
+}
+
+// SelectElementData
+SelectElementData::SelectElementData()
+    : m_multiple(false) 
+    , m_size(0)
+    , m_lastOnChangeIndex(-1)
+    , m_activeSelectionState(false)
+    , m_activeSelectionAnchorIndex(-1)
+    , m_activeSelectionEndIndex(-1)
+    , m_recalcListItems(false)
+    , m_repeatingChar(0)
+    , m_lastCharTime(0)
+{
+}
+
+void SelectElementData::checkListItems(const Element* element) const
+{
+#if !ASSERT_DISABLED
+    Vector<Element*> items = m_listItems;
+    SelectElement::recalcListItems(*const_cast<SelectElementData*>(this), element, false);
+    ASSERT(items == m_listItems);
+#else
+    UNUSED_PARAM(element);
+#endif
+}
+
+Vector<Element*>& SelectElementData::listItems(const Element* element)
+{
+    if (m_recalcListItems)
+        SelectElement::recalcListItems(*this, element);
+    else
+        checkListItems(element);
+
+    return m_listItems;
+}
+
+const Vector<Element*>& SelectElementData::listItems(const Element* element) const
+{
+    if (m_recalcListItems)
+        SelectElement::recalcListItems(*const_cast<SelectElementData*>(this), element);
+    else
+        checkListItems(element);
+
+    return m_listItems;
+}
+
+SelectElement* toSelectElement(Element* element)
+{
+    if (element->isHTMLElement()) {
+        if (element->hasTagName(HTMLNames::selectTag))
+            return static_cast<HTMLSelectElement*>(element);
+        if (element->hasTagName(HTMLNames::keygenTag))
+            return static_cast<HTMLKeygenElement*>(element);
+    }
+
+#if ENABLE(WML)
+    if (element->isWMLElement() && element->hasTagName(WMLNames::selectTag))
+        return static_cast<WMLSelectElement*>(element);
+#endif
+
+    return 0;
+}
+
+}