/* | |
* This file is part of the select element renderer in WebCore. | |
* | |
* Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. | |
* 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 "RenderMenuList.h" | |
#include "AXObjectCache.h" | |
#include "AccessibilityObject.h" | |
#include "CSSStyleSelector.h" | |
#include "Frame.h" | |
#include "FrameView.h" | |
#include "HTMLNames.h" | |
#include "NodeRenderStyle.h" | |
#include "OptionElement.h" | |
#include "OptionGroupElement.h" | |
#include "PopupMenu.h" | |
#include "RenderBR.h" | |
#include "RenderScrollbar.h" | |
#include "RenderTheme.h" | |
#include "SelectElement.h" | |
#include <math.h> | |
using namespace std; | |
namespace WebCore { | |
using namespace HTMLNames; | |
RenderMenuList::RenderMenuList(Element* element) | |
: RenderFlexibleBox(element) | |
, m_buttonText(0) | |
, m_innerBlock(0) | |
, m_optionsChanged(true) | |
, m_optionsWidth(0) | |
, m_lastSelectedIndex(-1) | |
, m_popup(0) | |
, m_popupIsVisible(false) | |
{ | |
} | |
RenderMenuList::~RenderMenuList() | |
{ | |
if (m_popup) | |
m_popup->disconnectClient(); | |
m_popup = 0; | |
} | |
void RenderMenuList::createInnerBlock() | |
{ | |
if (m_innerBlock) { | |
ASSERT(firstChild() == m_innerBlock); | |
ASSERT(!m_innerBlock->nextSibling()); | |
return; | |
} | |
// Create an anonymous block. | |
ASSERT(!firstChild()); | |
m_innerBlock = createAnonymousBlock(); | |
adjustInnerStyle(); | |
RenderFlexibleBox::addChild(m_innerBlock); | |
} | |
void RenderMenuList::adjustInnerStyle() | |
{ | |
m_innerBlock->style()->setBoxFlex(1.0f); | |
m_innerBlock->style()->setPaddingLeft(Length(theme()->popupInternalPaddingLeft(style()), Fixed)); | |
m_innerBlock->style()->setPaddingRight(Length(theme()->popupInternalPaddingRight(style()), Fixed)); | |
m_innerBlock->style()->setPaddingTop(Length(theme()->popupInternalPaddingTop(style()), Fixed)); | |
m_innerBlock->style()->setPaddingBottom(Length(theme()->popupInternalPaddingBottom(style()), Fixed)); | |
if (PopupMenu::itemWritingDirectionIsNatural()) { | |
// Items in the popup will not respect the CSS text-align and direction properties, | |
// so we must adjust our own style to match. | |
m_innerBlock->style()->setTextAlign(LEFT); | |
TextDirection direction = (m_buttonText && m_buttonText->text()->defaultWritingDirection() == WTF::Unicode::RightToLeft) ? RTL : LTR; | |
m_innerBlock->style()->setDirection(direction); | |
} | |
} | |
void RenderMenuList::addChild(RenderObject* newChild, RenderObject* beforeChild) | |
{ | |
createInnerBlock(); | |
m_innerBlock->addChild(newChild, beforeChild); | |
} | |
void RenderMenuList::removeChild(RenderObject* oldChild) | |
{ | |
if (oldChild == m_innerBlock || !m_innerBlock) { | |
RenderFlexibleBox::removeChild(oldChild); | |
m_innerBlock = 0; | |
} else | |
m_innerBlock->removeChild(oldChild); | |
} | |
void RenderMenuList::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) | |
{ | |
RenderBlock::styleDidChange(diff, oldStyle); | |
if (m_buttonText) | |
m_buttonText->setStyle(style()); | |
if (m_innerBlock) // RenderBlock handled updating the anonymous block's style. | |
adjustInnerStyle(); | |
setReplaced(isInline()); | |
bool fontChanged = !oldStyle || oldStyle->font() != style()->font(); | |
if (fontChanged) | |
updateOptionsWidth(); | |
} | |
void RenderMenuList::updateOptionsWidth() | |
{ | |
float maxOptionWidth = 0; | |
const Vector<Element*>& listItems = toSelectElement(static_cast<Element*>(node()))->listItems(); | |
int size = listItems.size(); | |
for (int i = 0; i < size; ++i) { | |
Element* element = listItems[i]; | |
OptionElement* optionElement = toOptionElement(element); | |
if (!optionElement) | |
continue; | |
String text = optionElement->textIndentedToRespectGroupLabel(); | |
if (theme()->popupOptionSupportsTextIndent()) { | |
// Add in the option's text indent. We can't calculate percentage values for now. | |
float optionWidth = 0; | |
if (RenderStyle* optionStyle = element->renderStyle()) | |
optionWidth += optionStyle->textIndent().calcMinValue(0); | |
if (!text.isEmpty()) | |
optionWidth += style()->font().floatWidth(text); | |
maxOptionWidth = max(maxOptionWidth, optionWidth); | |
} else if (!text.isEmpty()) | |
maxOptionWidth = max(maxOptionWidth, style()->font().floatWidth(text)); | |
} | |
int width = static_cast<int>(ceilf(maxOptionWidth)); | |
if (m_optionsWidth == width) | |
return; | |
m_optionsWidth = width; | |
if (parent()) | |
setNeedsLayoutAndPrefWidthsRecalc(); | |
} | |
void RenderMenuList::updateFromElement() | |
{ | |
if (m_optionsChanged) { | |
updateOptionsWidth(); | |
m_optionsChanged = false; | |
} | |
if (m_popupIsVisible) | |
m_popup->updateFromElement(); | |
else | |
setTextFromOption(toSelectElement(static_cast<Element*>(node()))->selectedIndex()); | |
} | |
void RenderMenuList::setTextFromOption(int optionIndex) | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
int size = listItems.size(); | |
int i = select->optionToListIndex(optionIndex); | |
String text = ""; | |
if (i >= 0 && i < size) { | |
if (OptionElement* optionElement = toOptionElement(listItems[i])) | |
text = optionElement->textIndentedToRespectGroupLabel(); | |
} | |
setText(text.stripWhiteSpace()); | |
} | |
void RenderMenuList::setText(const String& s) | |
{ | |
if (s.isEmpty()) { | |
if (!m_buttonText || !m_buttonText->isBR()) { | |
if (m_buttonText) | |
m_buttonText->destroy(); | |
m_buttonText = new (renderArena()) RenderBR(document()); | |
m_buttonText->setStyle(style()); | |
addChild(m_buttonText); | |
} | |
} else { | |
if (m_buttonText && !m_buttonText->isBR()) | |
m_buttonText->setText(s.impl()); | |
else { | |
if (m_buttonText) | |
m_buttonText->destroy(); | |
m_buttonText = new (renderArena()) RenderText(document(), s.impl()); | |
m_buttonText->setStyle(style()); | |
addChild(m_buttonText); | |
} | |
adjustInnerStyle(); | |
} | |
} | |
String RenderMenuList::text() const | |
{ | |
return m_buttonText ? m_buttonText->text() : 0; | |
} | |
IntRect RenderMenuList::controlClipRect(int tx, int ty) const | |
{ | |
// Clip to the intersection of the content box and the content box for the inner box | |
// This will leave room for the arrows which sit in the inner box padding, | |
// and if the inner box ever spills out of the outer box, that will get clipped too. | |
IntRect outerBox(tx + borderLeft() + paddingLeft(), | |
ty + borderTop() + paddingTop(), | |
contentWidth(), | |
contentHeight()); | |
IntRect innerBox(tx + m_innerBlock->x() + m_innerBlock->paddingLeft(), | |
ty + m_innerBlock->y() + m_innerBlock->paddingTop(), | |
m_innerBlock->contentWidth(), | |
m_innerBlock->contentHeight()); | |
return intersection(outerBox, innerBox); | |
} | |
void RenderMenuList::calcPrefWidths() | |
{ | |
m_minPrefWidth = 0; | |
m_maxPrefWidth = 0; | |
if (style()->width().isFixed() && style()->width().value() > 0) | |
m_minPrefWidth = m_maxPrefWidth = calcContentBoxWidth(style()->width().value()); | |
else | |
m_maxPrefWidth = max(m_optionsWidth, theme()->minimumMenuListSize(style())) + m_innerBlock->paddingLeft() + m_innerBlock->paddingRight(); | |
if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) { | |
m_maxPrefWidth = max(m_maxPrefWidth, calcContentBoxWidth(style()->minWidth().value())); | |
m_minPrefWidth = max(m_minPrefWidth, calcContentBoxWidth(style()->minWidth().value())); | |
} else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent())) | |
m_minPrefWidth = 0; | |
else | |
m_minPrefWidth = m_maxPrefWidth; | |
if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) { | |
m_maxPrefWidth = min(m_maxPrefWidth, calcContentBoxWidth(style()->maxWidth().value())); | |
m_minPrefWidth = min(m_minPrefWidth, calcContentBoxWidth(style()->maxWidth().value())); | |
} | |
int toAdd = paddingLeft() + paddingRight() + borderLeft() + borderRight(); | |
m_minPrefWidth += toAdd; | |
m_maxPrefWidth += toAdd; | |
setPrefWidthsDirty(false); | |
} | |
void RenderMenuList::showPopup() | |
{ | |
if (m_popupIsVisible) | |
return; | |
// Create m_innerBlock here so it ends up as the first child. | |
// This is important because otherwise we might try to create m_innerBlock | |
// inside the showPopup call and it would fail. | |
createInnerBlock(); | |
if (!m_popup) | |
m_popup = PopupMenu::create(this); | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
m_popupIsVisible = true; | |
// Compute the top left taking transforms into account, but use | |
// the actual width of the element to size the popup. | |
FloatPoint absTopLeft = localToAbsolute(FloatPoint(), false, true); | |
IntRect absBounds = absoluteBoundingBoxRect(); | |
absBounds.setLocation(roundedIntPoint(absTopLeft)); | |
m_popup->show(absBounds, document()->view(), | |
select->optionToListIndex(select->selectedIndex())); | |
} | |
void RenderMenuList::hidePopup() | |
{ | |
if (m_popup) | |
m_popup->hide(); | |
} | |
void RenderMenuList::valueChanged(unsigned listIndex, bool fireOnChange) | |
{ | |
// Check to ensure a page navigation has not occurred while | |
// the popup was up. | |
Document* doc = static_cast<Element*>(node())->document(); | |
if (!doc || doc != doc->frame()->document()) | |
return; | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
select->setSelectedIndexByUser(select->listToOptionIndex(listIndex), true, fireOnChange); | |
} | |
#if ENABLE(NO_LISTBOX_RENDERING) | |
void RenderMenuList::listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow) | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
select->listBoxSelectItem(select->listToOptionIndex(listIndex), allowMultiplySelections, shift, fireOnChangeNow); | |
} | |
bool RenderMenuList::multiple() | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
return select->multiple(); | |
} | |
#endif | |
void RenderMenuList::didSetSelectedIndex() | |
{ | |
int index = selectedIndex(); | |
if (m_lastSelectedIndex == index) | |
return; | |
m_lastSelectedIndex = index; | |
if (AXObjectCache::accessibilityEnabled()) | |
document()->axObjectCache()->postNotification(this, AXObjectCache::AXMenuListValueChanged, true, PostSynchronously); | |
} | |
String RenderMenuList::itemText(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return String(); | |
Element* element = listItems[listIndex]; | |
if (OptionGroupElement* optionGroupElement = toOptionGroupElement(element)) | |
return optionGroupElement->groupLabelText(); | |
else if (OptionElement* optionElement = toOptionElement(element)) | |
return optionElement->textIndentedToRespectGroupLabel(); | |
return String(); | |
} | |
String RenderMenuList::itemAccessibilityText(unsigned listIndex) const | |
{ | |
// Allow the accessible name be changed if necessary. | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return String(); | |
return AccessibilityObject::getAttribute(listItems[listIndex], aria_labelAttr); | |
} | |
String RenderMenuList::itemToolTip(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return String(); | |
Element* element = listItems[listIndex]; | |
return element->title(); | |
} | |
bool RenderMenuList::itemIsEnabled(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return false; | |
Element* element = listItems[listIndex]; | |
if (!isOptionElement(element)) | |
return false; | |
bool groupEnabled = true; | |
if (Element* parentElement = element->parentElement()) { | |
if (isOptionGroupElement(parentElement)) | |
groupEnabled = parentElement->isEnabledFormControl(); | |
} | |
if (!groupEnabled) | |
return false; | |
return element->isEnabledFormControl(); | |
} | |
PopupMenuStyle RenderMenuList::itemStyle(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) { | |
// If we are making an out of bounds access, then we want to use the style | |
// of a different option element (index 0). However, if there isn't an option element | |
// before at index 0, we fall back to the menu's style. | |
if (!listIndex) | |
return menuStyle(); | |
// Try to retrieve the style of an option element we know exists (index 0). | |
listIndex = 0; | |
} | |
Element* element = listItems[listIndex]; | |
RenderStyle* style = element->renderStyle() ? element->renderStyle() : element->computedStyle(); | |
return style ? PopupMenuStyle(style->color(), itemBackgroundColor(listIndex), style->font(), style->visibility() == VISIBLE, style->textIndent(), style->direction()) : menuStyle(); | |
} | |
Color RenderMenuList::itemBackgroundColor(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return style()->backgroundColor(); | |
Element* element = listItems[listIndex]; | |
Color backgroundColor; | |
if (element->renderStyle()) | |
backgroundColor = element->renderStyle()->backgroundColor(); | |
// If the item has an opaque background color, return that. | |
if (!backgroundColor.hasAlpha()) | |
return backgroundColor; | |
// Otherwise, the item's background is overlayed on top of the menu background. | |
backgroundColor = style()->backgroundColor().blend(backgroundColor); | |
if (!backgroundColor.hasAlpha()) | |
return backgroundColor; | |
// If the menu background is not opaque, then add an opaque white background behind. | |
return Color(Color::white).blend(backgroundColor); | |
} | |
PopupMenuStyle RenderMenuList::menuStyle() const | |
{ | |
RenderStyle* s = m_innerBlock ? m_innerBlock->style() : style(); | |
return PopupMenuStyle(s->color(), s->backgroundColor(), s->font(), s->visibility() == VISIBLE, s->textIndent(), s->direction()); | |
} | |
HostWindow* RenderMenuList::hostWindow() const | |
{ | |
return document()->view()->hostWindow(); | |
} | |
PassRefPtr<Scrollbar> RenderMenuList::createScrollbar(ScrollbarClient* client, ScrollbarOrientation orientation, ScrollbarControlSize controlSize) | |
{ | |
RefPtr<Scrollbar> widget; | |
bool hasCustomScrollbarStyle = style()->hasPseudoStyle(SCROLLBAR); | |
if (hasCustomScrollbarStyle) | |
widget = RenderScrollbar::createCustomScrollbar(client, orientation, this); | |
else | |
widget = Scrollbar::createNativeScrollbar(client, orientation, controlSize); | |
return widget.release(); | |
} | |
int RenderMenuList::clientInsetLeft() const | |
{ | |
return 0; | |
} | |
int RenderMenuList::clientInsetRight() const | |
{ | |
return 0; | |
} | |
int RenderMenuList::clientPaddingLeft() const | |
{ | |
return paddingLeft(); | |
} | |
const int endOfLinePadding = 2; | |
int RenderMenuList::clientPaddingRight() const | |
{ | |
if (style()->appearance() == MenulistPart || style()->appearance() == MenulistButtonPart) { | |
// For these appearance values, the theme applies padding to leave room for the | |
// drop-down button. But leaving room for the button inside the popup menu itself | |
// looks strange, so we return a small default padding to avoid having a large empty | |
// space appear on the side of the popup menu. | |
return endOfLinePadding; | |
} | |
// If the appearance isn't MenulistPart, then the select is styled (non-native), so | |
// we want to return the user specified padding. | |
return paddingRight(); | |
} | |
int RenderMenuList::listSize() const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
return select->listItems().size(); | |
} | |
int RenderMenuList::selectedIndex() const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
return select->optionToListIndex(select->selectedIndex()); | |
} | |
void RenderMenuList::popupDidHide() | |
{ | |
m_popupIsVisible = false; | |
} | |
bool RenderMenuList::itemIsSeparator(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return false; | |
Element* element = listItems[listIndex]; | |
return element->hasTagName(hrTag); | |
} | |
bool RenderMenuList::itemIsLabel(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return false; | |
Element* element = listItems[listIndex]; | |
return isOptionGroupElement(element); | |
} | |
bool RenderMenuList::itemIsSelected(unsigned listIndex) const | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
const Vector<Element*>& listItems = select->listItems(); | |
if (listIndex >= listItems.size()) | |
return false; | |
Element* element = listItems[listIndex]; | |
if (OptionElement* optionElement = toOptionElement(element)) | |
return optionElement->selected(); | |
return false; | |
} | |
void RenderMenuList::setTextFromItem(unsigned listIndex) | |
{ | |
SelectElement* select = toSelectElement(static_cast<Element*>(node())); | |
setTextFromOption(select->listToOptionIndex(listIndex)); | |
} | |
FontSelector* RenderMenuList::fontSelector() const | |
{ | |
return document()->styleSelector()->fontSelector(); | |
} | |
} |