blob: d07163c3c4cd33a58f4fdadae2b0820e1b39571d [file] [log] [blame]
/*
* This file is part of the select element renderer in WebCore.
*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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 "core/rendering/RenderMenuList.h"
#include "core/HTMLNames.h"
#include "core/accessibility/AXMenuList.h"
#include "core/accessibility/AXObjectCache.h"
#include "core/css/CSSFontSelector.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/NodeRenderStyle.h"
#include "core/frame/FrameHost.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/html/HTMLOptGroupElement.h"
#include "core/html/HTMLOptionElement.h"
#include "core/html/HTMLSelectElement.h"
#include "core/page/Chrome.h"
#include "core/rendering/RenderBR.h"
#include "core/rendering/RenderScrollbar.h"
#include "core/rendering/RenderTheme.h"
#include "core/rendering/RenderView.h"
#include "platform/fonts/FontCache.h"
#include "platform/geometry/IntSize.h"
#include "platform/text/PlatformLocale.h"
#include <math.h>
namespace blink {
using namespace HTMLNames;
RenderMenuList::RenderMenuList(Element* element)
: RenderFlexibleBox(element)
, m_buttonText(nullptr)
, m_innerBlock(nullptr)
, m_optionsChanged(true)
, m_optionsWidth(0)
, m_lastActiveIndex(-1)
, m_popupIsVisible(false)
{
ASSERT(isHTMLSelectElement(element));
}
RenderMenuList::~RenderMenuList()
{
ASSERT(!m_popup);
}
void RenderMenuList::destroy()
{
if (m_popup)
m_popup->disconnectClient();
m_popup = nullptr;
RenderFlexibleBox::destroy();
}
void RenderMenuList::trace(Visitor* visitor)
{
visitor->trace(m_buttonText);
visitor->trace(m_innerBlock);
visitor->trace(m_popup);
RenderFlexibleBox::trace(visitor);
}
// FIXME: Instead of this hack we should add a ShadowRoot to <select> with no insertion point
// to prevent children from rendering.
bool RenderMenuList::isChildAllowed(RenderObject* object, RenderStyle*) const
{
return object->isAnonymous() && !object->isRenderFullScreen();
}
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()
{
RenderStyle* innerStyle = m_innerBlock->style();
innerStyle->setFlexGrow(1);
innerStyle->setFlexShrink(1);
// Use margin:auto instead of align-items:center to get safe centering, i.e.
// when the content overflows, treat it the same as align-items: flex-start.
// But we only do that for the cases where html.css would otherwise use center.
if (style()->alignItems() == ItemPositionCenter) {
innerStyle->setMarginTop(Length());
innerStyle->setMarginBottom(Length());
innerStyle->setAlignSelf(ItemPositionFlexStart);
}
innerStyle->setPaddingLeft(Length(RenderTheme::theme().popupInternalPaddingLeft(style()), Fixed));
innerStyle->setPaddingRight(Length(RenderTheme::theme().popupInternalPaddingRight(style()), Fixed));
innerStyle->setPaddingTop(Length(RenderTheme::theme().popupInternalPaddingTop(style()), Fixed));
innerStyle->setPaddingBottom(Length(RenderTheme::theme().popupInternalPaddingBottom(style()), Fixed));
if (m_optionStyle) {
if ((m_optionStyle->direction() != innerStyle->direction() || m_optionStyle->unicodeBidi() != innerStyle->unicodeBidi()))
m_innerBlock->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
innerStyle->setTextAlign(style()->isLeftToRightDirection() ? LEFT : RIGHT);
innerStyle->setDirection(m_optionStyle->direction());
innerStyle->setUnicodeBidi(m_optionStyle->unicodeBidi());
}
}
inline HTMLSelectElement* RenderMenuList::selectElement() const
{
return toHTMLSelectElement(node());
}
void RenderMenuList::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
createInnerBlock();
m_innerBlock->addChild(newChild, beforeChild);
ASSERT(m_innerBlock == firstChild());
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->childrenChanged(this);
}
void RenderMenuList::removeChild(RenderObject* oldChild)
{
if (oldChild == m_innerBlock || !m_innerBlock) {
RenderFlexibleBox::removeChild(oldChild);
m_innerBlock = nullptr;
} 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();
bool fontChanged = !oldStyle || oldStyle->font() != style()->font();
if (fontChanged)
updateOptionsWidth();
}
void RenderMenuList::updateOptionsWidth()
{
float maxOptionWidth = 0;
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
int size = listItems.size();
FontCachePurgePreventer fontCachePurgePreventer;
for (int i = 0; i < size; ++i) {
HTMLElement* element = listItems[i];
if (!isHTMLOptionElement(*element))
continue;
String text = toHTMLOptionElement(element)->textIndentedToRespectGroupLabel();
applyTextTransform(style(), text, ' ');
if (RenderTheme::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 += minimumValueForLength(optionStyle->textIndent(), 0);
if (!text.isEmpty())
optionWidth += style()->font().width(text);
maxOptionWidth = std::max(maxOptionWidth, optionWidth);
} else if (!text.isEmpty()) {
maxOptionWidth = std::max(maxOptionWidth, style()->font().width(text));
}
}
int width = static_cast<int>(ceilf(maxOptionWidth));
if (m_optionsWidth == width)
return;
m_optionsWidth = width;
if (parent())
setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
}
void RenderMenuList::updateFromElement()
{
if (m_optionsChanged) {
updateOptionsWidth();
m_optionsChanged = false;
}
if (m_popupIsVisible)
m_popup->updateFromElement();
if (selectElement()->suggestedIndex() >= 0)
setTextFromOption(selectElement()->suggestedIndex());
else
setTextFromOption(selectElement()->selectedIndex());
}
void RenderMenuList::setTextFromOption(int optionIndex)
{
HTMLSelectElement* select = selectElement();
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = select->listItems();
const int size = listItems.size();
String text = emptyString();
m_optionStyle.clear();
if (multiple()) {
unsigned selectedCount = 0;
int firstSelectedIndex = -1;
for (int i = 0; i < size; ++i) {
Element* element = listItems[i];
if (!isHTMLOptionElement(*element))
continue;
if (toHTMLOptionElement(element)->selected()) {
if (++selectedCount == 1)
firstSelectedIndex = i;
}
}
if (selectedCount == 1) {
ASSERT(0 <= firstSelectedIndex);
ASSERT(firstSelectedIndex < size);
HTMLOptionElement* selectedOptionElement = toHTMLOptionElement(listItems[firstSelectedIndex]);
ASSERT(selectedOptionElement->selected());
text = selectedOptionElement->textIndentedToRespectGroupLabel();
m_optionStyle = selectedOptionElement->renderStyle();
} else {
Locale& locale = select->locale();
String localizedNumberString = locale.convertToLocalizedNumber(String::number(selectedCount));
text = locale.queryString(WebLocalizedString::SelectMenuListText, localizedNumberString);
ASSERT(!m_optionStyle);
}
} else {
const int i = select->optionToListIndex(optionIndex);
if (i >= 0 && i < size) {
Element* element = listItems[i];
if (isHTMLOptionElement(*element)) {
text = toHTMLOptionElement(element)->textIndentedToRespectGroupLabel();
m_optionStyle = element->renderStyle();
}
}
}
setText(text.stripWhiteSpace());
didUpdateActiveOption(optionIndex);
}
void RenderMenuList::setText(const String& s)
{
if (s.isEmpty()) {
if (!m_buttonText || !m_buttonText->isBR()) {
// FIXME: We should not modify the structure of the render tree
// during layout. crbug.com/370462
DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
if (m_buttonText)
m_buttonText->destroy();
m_buttonText = new RenderBR(&document());
m_buttonText->setStyle(style());
addChild(m_buttonText);
}
} else {
if (m_buttonText && !m_buttonText->isBR())
m_buttonText->setText(s.impl(), true);
else {
// FIXME: We should not modify the structure of the render tree
// during layout. crbug.com/370462
DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
if (m_buttonText)
m_buttonText->destroy();
m_buttonText = new RenderText(&document(), s.impl());
m_buttonText->setStyle(style());
// We need to set the text explicitly though it was specified in the
// constructor because RenderText doesn't refer to the text
// specified in the constructor in a case of re-transforming.
m_buttonText->setText(s.impl(), true);
addChild(m_buttonText);
}
adjustInnerStyle();
}
}
String RenderMenuList::text() const
{
return m_buttonText ? m_buttonText->text() : String();
}
LayoutRect RenderMenuList::controlClipRect(const LayoutPoint& additionalOffset) 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.
LayoutRect outerBox(additionalOffset.x() + borderLeft() + paddingLeft(),
additionalOffset.y() + borderTop() + paddingTop(),
contentWidth(),
contentHeight());
LayoutRect innerBox(additionalOffset.x() + m_innerBlock->x() + m_innerBlock->paddingLeft(),
additionalOffset.y() + m_innerBlock->y() + m_innerBlock->paddingTop(),
m_innerBlock->contentWidth(),
m_innerBlock->contentHeight());
return intersection(outerBox, innerBox);
}
void RenderMenuList::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
maxLogicalWidth = std::max(m_optionsWidth, RenderTheme::theme().minimumMenuListSize(style())) + m_innerBlock->paddingLeft() + m_innerBlock->paddingRight();
if (!style()->width().isPercent())
minLogicalWidth = maxLogicalWidth;
}
void RenderMenuList::showPopup()
{
if (m_popupIsVisible)
return;
if (document().frameHost()->chrome().hasOpenedPopup())
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 = document().frameHost()->chrome().createPopupMenu(*document().frame(), this);
m_popupIsVisible = true;
FloatQuad quad(localToAbsoluteQuad(FloatQuad(borderBoundingBox())));
IntSize size = pixelSnappedIntRect(frameRect()).size();
HTMLSelectElement* select = selectElement();
m_popup->show(quad, size, 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 = toElement(node())->document();
if (&doc != doc.frame()->document())
return;
HTMLSelectElement* select = selectElement();
select->optionSelectedByUser(select->listToOptionIndex(listIndex), fireOnChange);
}
void RenderMenuList::listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow)
{
selectElement()->listBoxSelectItem(listIndex, allowMultiplySelections, shift, fireOnChangeNow);
}
bool RenderMenuList::multiple() const
{
return selectElement()->multiple();
}
void RenderMenuList::didSetSelectedIndex(int listIndex)
{
didUpdateActiveOption(selectElement()->listToOptionIndex(listIndex));
}
void RenderMenuList::didUpdateActiveOption(int optionIndex)
{
if (!document().existingAXObjectCache())
return;
if (m_lastActiveIndex == optionIndex)
return;
m_lastActiveIndex = optionIndex;
HTMLSelectElement* select = selectElement();
int listIndex = select->optionToListIndex(optionIndex);
if (listIndex < 0 || listIndex >= static_cast<int>(select->listItems().size()))
return;
document().existingAXObjectCache()->handleUpdateActiveMenuOption(this, optionIndex);
}
String RenderMenuList::itemText(unsigned listIndex) const
{
HTMLSelectElement* select = selectElement();
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = select->listItems();
if (listIndex >= listItems.size())
return String();
String itemString;
Element* element = listItems[listIndex];
if (isHTMLOptGroupElement(*element))
itemString = toHTMLOptGroupElement(*element).groupLabelText();
else if (isHTMLOptionElement(*element))
itemString = toHTMLOptionElement(*element).textIndentedToRespectGroupLabel();
applyTextTransform(style(), itemString, ' ');
return itemString;
}
String RenderMenuList::itemAccessibilityText(unsigned listIndex) const
{
// Allow the accessible name be changed if necessary.
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
if (listIndex >= listItems.size())
return String();
return listItems[listIndex]->fastGetAttribute(aria_labelAttr);
}
String RenderMenuList::itemToolTip(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
if (listIndex >= listItems.size())
return String();
return listItems[listIndex]->title();
}
bool RenderMenuList::itemIsEnabled(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
if (listIndex >= listItems.size())
return false;
HTMLElement* element = listItems[listIndex];
if (!isHTMLOptionElement(*element))
return false;
bool groupEnabled = true;
if (Element* parentElement = element->parentElement()) {
if (isHTMLOptGroupElement(*parentElement))
groupEnabled = !parentElement->isDisabledFormControl();
}
if (!groupEnabled)
return false;
return !element->isDisabledFormControl();
}
PopupMenuStyle RenderMenuList::itemStyle(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->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;
}
HTMLElement* element = listItems[listIndex];
Color itemBackgroundColor;
bool itemHasCustomBackgroundColor;
getItemBackgroundColor(listIndex, itemBackgroundColor, itemHasCustomBackgroundColor);
RenderStyle* style = element->renderStyle() ? element->renderStyle() : element->computedStyle();
return style ? PopupMenuStyle(resolveColor(style, CSSPropertyColor), itemBackgroundColor, style->font(), style->visibility() == VISIBLE,
isHTMLOptionElement(*element) ? toHTMLOptionElement(*element).isDisplayNone() : style->display() == NONE,
style->textIndent(), style->direction(), isOverride(style->unicodeBidi()),
itemHasCustomBackgroundColor ? PopupMenuStyle::CustomBackgroundColor : PopupMenuStyle::DefaultBackgroundColor) : menuStyle();
}
void RenderMenuList::getItemBackgroundColor(unsigned listIndex, Color& itemBackgroundColor, bool& itemHasCustomBackgroundColor) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
if (listIndex >= listItems.size()) {
itemBackgroundColor = resolveColor(CSSPropertyBackgroundColor);
itemHasCustomBackgroundColor = false;
return;
}
HTMLElement* element = listItems[listIndex];
Color backgroundColor;
if (element->renderStyle())
backgroundColor = resolveColor(element->renderStyle(), CSSPropertyBackgroundColor);
itemHasCustomBackgroundColor = backgroundColor.alpha();
// If the item has an opaque background color, return that.
if (!backgroundColor.hasAlpha()) {
itemBackgroundColor = backgroundColor;
return;
}
// Otherwise, the item's background is overlayed on top of the menu background.
backgroundColor = resolveColor(CSSPropertyBackgroundColor).blend(backgroundColor);
if (!backgroundColor.hasAlpha()) {
itemBackgroundColor = backgroundColor;
return;
}
// If the menu background is not opaque, then add an opaque white background behind.
itemBackgroundColor = Color(Color::white).blend(backgroundColor);
}
PopupMenuStyle RenderMenuList::menuStyle() const
{
const RenderObject* o = m_innerBlock ? m_innerBlock.get() : this;
const RenderStyle* s = o->style();
return PopupMenuStyle(o->resolveColor(CSSPropertyColor), o->resolveColor(CSSPropertyBackgroundColor), s->font(), s->visibility() == VISIBLE,
s->display() == NONE, s->textIndent(), style()->direction(), isOverride(style()->unicodeBidi()));
}
LayoutUnit RenderMenuList::clientPaddingLeft() const
{
return paddingLeft() + m_innerBlock->paddingLeft();
}
const int endOfLinePadding = 2;
LayoutUnit 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() + m_innerBlock->paddingRight();
}
int RenderMenuList::listSize() const
{
return selectElement()->listItems().size();
}
int RenderMenuList::selectedIndex() const
{
HTMLSelectElement* select = selectElement();
return select->optionToListIndex(select->selectedIndex());
}
void RenderMenuList::popupDidHide()
{
m_popupIsVisible = false;
}
bool RenderMenuList::itemIsSeparator(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
return listIndex < listItems.size() && isHTMLHRElement(*listItems[listIndex]);
}
bool RenderMenuList::itemIsLabel(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
return listIndex < listItems.size() && isHTMLOptGroupElement(*listItems[listIndex]);
}
bool RenderMenuList::itemIsSelected(unsigned listIndex) const
{
const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& listItems = selectElement()->listItems();
if (listIndex >= listItems.size())
return false;
HTMLElement* element = listItems[listIndex];
return isHTMLOptionElement(*element) && toHTMLOptionElement(*element).selected();
}
void RenderMenuList::setTextFromItem(unsigned listIndex)
{
setTextFromOption(selectElement()->listToOptionIndex(listIndex));
}
} // namespace blink