667 lines
24 KiB
C++
667 lines
24 KiB
C++
/*
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* This file is part of the select element renderer in WebCore.
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*
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2015 Apple Inc. All rights reserved.
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* 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "RenderMenuList.h"
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#include "AXObjectCache.h"
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#include "AccessibilityMenuList.h"
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#include "CSSFontSelector.h"
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#include "Chrome.h"
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#include "ColorBlending.h"
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#include "Frame.h"
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#include "FrameView.h"
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#include "HTMLNames.h"
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#include "HTMLOptionElement.h"
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#include "HTMLOptGroupElement.h"
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#include "HTMLSelectElement.h"
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#include "NodeRenderStyle.h"
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#include "Page.h"
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#include "PopupMenu.h"
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#include "RenderScrollbar.h"
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#include "RenderText.h"
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#include "RenderTheme.h"
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#include "RenderTreeBuilder.h"
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#include "RenderView.h"
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#include "StyleResolver.h"
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#include "TextRun.h"
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#include <math.h>
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#include <wtf/IsoMallocInlines.h>
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#if PLATFORM(IOS_FAMILY)
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#include "LocalizedStrings.h"
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#include "RenderThemeIOS.h"
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#endif
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namespace WebCore {
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using namespace HTMLNames;
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderMenuList);
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#if PLATFORM(IOS_FAMILY)
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static size_t selectedOptionCount(const RenderMenuList& renderMenuList)
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{
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const Vector<HTMLElement*>& listItems = renderMenuList.selectElement().listItems();
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size_t numberOfItems = listItems.size();
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size_t count = 0;
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for (size_t i = 0; i < numberOfItems; ++i) {
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if (is<HTMLOptionElement>(*listItems[i]) && downcast<HTMLOptionElement>(*listItems[i]).selected())
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++count;
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}
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return count;
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}
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#endif
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RenderMenuList::RenderMenuList(HTMLSelectElement& element, RenderStyle&& style)
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: RenderFlexibleBox(element, WTFMove(style))
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, m_needsOptionsWidthUpdate(true)
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, m_optionsWidth(0)
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#if !PLATFORM(IOS_FAMILY)
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, m_popupIsVisible(false)
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#endif
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{
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}
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RenderMenuList::~RenderMenuList()
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{
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// Do not add any code here. Add it to willBeDestroyed() instead.
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}
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void RenderMenuList::willBeDestroyed()
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{
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#if !PLATFORM(IOS_FAMILY)
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if (m_popup)
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m_popup->disconnectClient();
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m_popup = nullptr;
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#endif
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RenderFlexibleBox::willBeDestroyed();
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}
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void RenderMenuList::setInnerRenderer(RenderBlock& innerRenderer)
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{
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ASSERT(!m_innerBlock.get());
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m_innerBlock = makeWeakPtr(innerRenderer);
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adjustInnerStyle();
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}
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void RenderMenuList::adjustInnerStyle()
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{
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auto& innerStyle = m_innerBlock->mutableStyle();
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innerStyle.setFlexGrow(1);
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innerStyle.setFlexShrink(1);
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// min-width: 0; is needed for correct shrinking.
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innerStyle.setMinWidth(Length(0, LengthType::Fixed));
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// Use margin:auto instead of align-items:center to get safe centering, i.e.
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// when the content overflows, treat it the same as align-items: flex-start.
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// But we only do that for the cases where html.css would otherwise use center.
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if (style().alignItems().position() == ItemPosition::Center) {
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innerStyle.setMarginTop(Length());
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innerStyle.setMarginBottom(Length());
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innerStyle.setAlignSelfPosition(ItemPosition::FlexStart);
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}
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innerStyle.setPaddingBox(theme().popupInternalPaddingBox(style(), document().settings()));
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if (document().page()->chrome().selectItemWritingDirectionIsNatural()) {
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// Items in the popup will not respect the CSS text-align and direction properties,
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// so we must adjust our own style to match.
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innerStyle.setTextAlign(TextAlignMode::Left);
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TextDirection direction = (m_buttonText && m_buttonText->text().defaultWritingDirection() == U_RIGHT_TO_LEFT) ? TextDirection::RTL : TextDirection::LTR;
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innerStyle.setDirection(direction);
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#if PLATFORM(IOS_FAMILY)
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} else if (document().page()->chrome().selectItemAlignmentFollowsMenuWritingDirection()) {
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innerStyle.setTextAlign(style().direction() == TextDirection::LTR ? TextAlignMode::Left : TextAlignMode::Right);
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TextDirection direction;
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EUnicodeBidi unicodeBidi;
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if (multiple() && selectedOptionCount(*this) != 1) {
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direction = (m_buttonText && m_buttonText->text().defaultWritingDirection() == U_RIGHT_TO_LEFT) ? TextDirection::RTL : TextDirection::LTR;
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unicodeBidi = UBNormal;
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} else if (m_optionStyle) {
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direction = m_optionStyle->direction();
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unicodeBidi = m_optionStyle->unicodeBidi();
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} else {
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direction = style().direction();
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unicodeBidi = style().unicodeBidi();
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}
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innerStyle.setDirection(direction);
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innerStyle.setUnicodeBidi(unicodeBidi);
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}
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#else
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} else if (m_optionStyle && document().page()->chrome().selectItemAlignmentFollowsMenuWritingDirection()) {
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if ((m_optionStyle->direction() != innerStyle.direction() || m_optionStyle->unicodeBidi() != innerStyle.unicodeBidi()))
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m_innerBlock->setNeedsLayoutAndPrefWidthsRecalc();
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innerStyle.setTextAlign(style().isLeftToRightDirection() ? TextAlignMode::Left : TextAlignMode::Right);
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innerStyle.setDirection(m_optionStyle->direction());
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innerStyle.setUnicodeBidi(m_optionStyle->unicodeBidi());
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}
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#endif // !PLATFORM(IOS_FAMILY)
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}
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HTMLSelectElement& RenderMenuList::selectElement() const
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{
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return downcast<HTMLSelectElement>(nodeForNonAnonymous());
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}
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void RenderMenuList::didAttachChild(RenderObject& child, RenderObject*)
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{
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if (AXObjectCache* cache = document().existingAXObjectCache())
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cache->childrenChanged(this, &child);
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}
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void RenderMenuList::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
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{
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RenderBlock::styleDidChange(diff, oldStyle);
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if (m_innerBlock) // RenderBlock handled updating the anonymous block's style.
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adjustInnerStyle();
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bool fontChanged = !oldStyle || oldStyle->fontCascade() != style().fontCascade();
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if (fontChanged) {
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updateOptionsWidth();
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m_needsOptionsWidthUpdate = false;
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}
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}
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void RenderMenuList::updateOptionsWidth()
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{
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float maxOptionWidth = 0;
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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int size = listItems.size();
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for (int i = 0; i < size; ++i) {
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HTMLElement* element = listItems[i];
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if (!is<HTMLOptionElement>(*element))
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continue;
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String text = downcast<HTMLOptionElement>(*element).textIndentedToRespectGroupLabel();
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text = applyTextTransform(style(), text, ' ');
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if (theme().popupOptionSupportsTextIndent()) {
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// Add in the option's text indent. We can't calculate percentage values for now.
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float optionWidth = 0;
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if (auto* optionStyle = element->computedStyle())
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optionWidth += minimumValueForLength(optionStyle->textIndent(), 0);
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if (!text.isEmpty()) {
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const FontCascade& font = style().fontCascade();
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TextRun run = RenderBlock::constructTextRun(text, style());
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optionWidth += font.width(run);
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}
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maxOptionWidth = std::max(maxOptionWidth, optionWidth);
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} else if (!text.isEmpty()) {
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const FontCascade& font = style().fontCascade();
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TextRun run = RenderBlock::constructTextRun(text, style());
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maxOptionWidth = std::max(maxOptionWidth, font.width(run));
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}
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}
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int width = static_cast<int>(ceilf(maxOptionWidth));
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if (m_optionsWidth == width)
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return;
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m_optionsWidth = width;
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if (parent())
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setNeedsLayoutAndPrefWidthsRecalc();
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}
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void RenderMenuList::updateFromElement()
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{
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if (m_needsOptionsWidthUpdate) {
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updateOptionsWidth();
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m_needsOptionsWidthUpdate = false;
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}
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#if !PLATFORM(IOS_FAMILY)
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if (m_popupIsVisible)
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m_popup->updateFromElement();
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else
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#endif
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setTextFromOption(selectElement().selectedIndex());
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}
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void RenderMenuList::setTextFromOption(int optionIndex)
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{
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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int size = listItems.size();
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int i = selectElement().optionToListIndex(optionIndex);
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String text = emptyString();
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if (i >= 0 && i < size) {
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Element* element = listItems[i];
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if (is<HTMLOptionElement>(*element)) {
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text = downcast<HTMLOptionElement>(*element).textIndentedToRespectGroupLabel();
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auto* style = element->computedStyle();
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m_optionStyle = style ? RenderStyle::clonePtr(*style) : nullptr;
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}
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}
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#if PLATFORM(IOS_FAMILY)
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if (multiple()) {
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size_t count = selectedOptionCount(*this);
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if (count != 1)
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text = htmlSelectMultipleItems(count);
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}
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#endif
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setText(text.stripWhiteSpace());
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didUpdateActiveOption(optionIndex);
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}
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void RenderMenuList::setText(const String& s)
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{
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String textToUse = s.isEmpty() ? "\n"_str : s;
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if (m_buttonText) {
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m_buttonText->setText(textToUse.impl(), true);
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m_buttonText->dirtyLineBoxes(false);
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} else {
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auto newButtonText = createRenderer<RenderText>(document(), textToUse);
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m_buttonText = makeWeakPtr(*newButtonText);
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// FIXME: This mutation should go through the normal RenderTreeBuilder path.
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if (RenderTreeBuilder::current())
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RenderTreeBuilder::current()->attach(*this, WTFMove(newButtonText));
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else
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RenderTreeBuilder(*document().renderView()).attach(*this, WTFMove(newButtonText));
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}
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adjustInnerStyle();
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}
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String RenderMenuList::text() const
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{
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return m_buttonText ? m_buttonText->text() : String();
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}
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LayoutRect RenderMenuList::controlClipRect(const LayoutPoint& additionalOffset) const
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{
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// Clip to the intersection of the content box and the content box for the inner box
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// This will leave room for the arrows which sit in the inner box padding,
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// and if the inner box ever spills out of the outer box, that will get clipped too.
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LayoutRect outerBox(additionalOffset.x() + borderLeft() + paddingLeft(),
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additionalOffset.y() + borderTop() + paddingTop(),
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contentWidth(),
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contentHeight());
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LayoutRect innerBox(additionalOffset.x() + m_innerBlock->x() + m_innerBlock->paddingLeft(),
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additionalOffset.y() + m_innerBlock->y() + m_innerBlock->paddingTop(),
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m_innerBlock->contentWidth(),
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m_innerBlock->contentHeight());
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return intersection(outerBox, innerBox);
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}
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void RenderMenuList::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
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{
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maxLogicalWidth = shouldApplySizeContainment(*this) ? theme().minimumMenuListSize(style()) : std::max(m_optionsWidth, theme().minimumMenuListSize(style()));
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maxLogicalWidth += m_innerBlock->paddingLeft() + m_innerBlock->paddingRight();
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if (!style().width().isPercentOrCalculated())
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minLogicalWidth = maxLogicalWidth;
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}
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void RenderMenuList::computePreferredLogicalWidths()
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{
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m_minPreferredLogicalWidth = 0;
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m_maxPreferredLogicalWidth = 0;
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if (style().width().isFixed() && style().width().value() > 0)
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m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style().width());
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else
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computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
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RenderBox::computePreferredLogicalWidths(style().minWidth(), style().maxWidth(), horizontalBorderAndPaddingExtent());
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setPreferredLogicalWidthsDirty(false);
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}
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#if PLATFORM(IOS_FAMILY)
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NO_RETURN_DUE_TO_ASSERT
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void RenderMenuList::showPopup()
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{
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ASSERT_NOT_REACHED();
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}
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#else
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void RenderMenuList::showPopup()
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{
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if (m_popupIsVisible)
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return;
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ASSERT(m_innerBlock);
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if (!m_popup)
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m_popup = document().page()->chrome().createPopupMenu(*this);
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m_popupIsVisible = true;
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// Compute the top left taking transforms into account, but use
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// the actual width of the element to size the popup.
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FloatPoint absTopLeft = localToAbsolute(FloatPoint(), UseTransforms);
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IntRect absBounds = absoluteBoundingBoxRectIgnoringTransforms();
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absBounds.setLocation(roundedIntPoint(absTopLeft));
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m_popup->show(absBounds, &view().frameView(), selectElement().optionToListIndex(selectElement().selectedIndex()));
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}
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#endif
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void RenderMenuList::hidePopup()
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{
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#if !PLATFORM(IOS_FAMILY)
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if (m_popup)
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m_popup->hide();
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#endif
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}
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void RenderMenuList::valueChanged(unsigned listIndex, bool fireOnChange)
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{
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// Check to ensure a page navigation has not occurred while
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// the popup was up.
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if (&document() != document().frame()->document())
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return;
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selectElement().optionSelectedByUser(selectElement().listToOptionIndex(listIndex), fireOnChange);
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}
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void RenderMenuList::listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow)
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{
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selectElement().listBoxSelectItem(listIndex, allowMultiplySelections, shift, fireOnChangeNow);
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}
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bool RenderMenuList::multiple() const
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{
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return selectElement().multiple();
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}
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void RenderMenuList::didSetSelectedIndex(int listIndex)
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{
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didUpdateActiveOption(selectElement().listToOptionIndex(listIndex));
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}
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void RenderMenuList::didUpdateActiveOption(int optionIndex)
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{
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if (!AXObjectCache::accessibilityEnabled())
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return;
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auto* axCache = document().existingAXObjectCache();
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if (!axCache)
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return;
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if (m_lastActiveIndex == optionIndex)
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return;
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m_lastActiveIndex = optionIndex;
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int listIndex = selectElement().optionToListIndex(optionIndex);
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if (listIndex < 0 || listIndex >= static_cast<int>(selectElement().listItems().size()))
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return;
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auto* axObject = axCache->get(this);
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if (is<AccessibilityMenuList>(axObject))
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downcast<AccessibilityMenuList>(*axObject).didUpdateActiveOption(optionIndex);
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}
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String RenderMenuList::itemText(unsigned listIndex) const
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{
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auto& listItems = selectElement().listItems();
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if (listIndex >= listItems.size())
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return String();
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String itemString;
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auto& element = *listItems[listIndex];
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if (is<HTMLOptGroupElement>(element))
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itemString = downcast<HTMLOptGroupElement>(element).groupLabelText();
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else if (is<HTMLOptionElement>(element))
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itemString = downcast<HTMLOptionElement>(element).textIndentedToRespectGroupLabel();
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return applyTextTransform(style(), itemString, ' ');
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}
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String RenderMenuList::itemLabel(unsigned) const
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{
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return String();
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}
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String RenderMenuList::itemIcon(unsigned) const
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{
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return String();
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}
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String RenderMenuList::itemAccessibilityText(unsigned listIndex) const
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{
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// Allow the accessible name be changed if necessary.
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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if (listIndex >= listItems.size())
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return String();
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return listItems[listIndex]->attributeWithoutSynchronization(aria_labelAttr);
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}
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String RenderMenuList::itemToolTip(unsigned listIndex) const
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{
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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if (listIndex >= listItems.size())
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return String();
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return listItems[listIndex]->title();
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}
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bool RenderMenuList::itemIsEnabled(unsigned listIndex) const
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{
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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if (listIndex >= listItems.size())
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return false;
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HTMLElement* element = listItems[listIndex];
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if (!is<HTMLOptionElement>(*element))
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return false;
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bool groupEnabled = true;
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if (Element* parentElement = element->parentElement()) {
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if (is<HTMLOptGroupElement>(*parentElement))
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groupEnabled = !parentElement->isDisabledFormControl();
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}
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if (!groupEnabled)
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return false;
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return !element->isDisabledFormControl();
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}
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PopupMenuStyle RenderMenuList::itemStyle(unsigned listIndex) const
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{
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const Vector<HTMLElement*>& listItems = selectElement().listItems();
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if (listIndex >= listItems.size()) {
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// If we are making an out of bounds access, then we want to use the style
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// of a different option element (index 0). However, if there isn't an option element
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// before at index 0, we fall back to the menu's style.
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if (!listIndex)
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return menuStyle();
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// Try to retrieve the style of an option element we know exists (index 0).
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listIndex = 0;
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}
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HTMLElement* element = listItems[listIndex];
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Color itemBackgroundColor;
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bool itemHasCustomBackgroundColor;
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getItemBackgroundColor(listIndex, itemBackgroundColor, itemHasCustomBackgroundColor);
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auto& style = *element->computedStyle();
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return PopupMenuStyle(style.visitedDependentColorWithColorFilter(CSSPropertyColor), itemBackgroundColor, style.fontCascade(), style.visibility() == Visibility::Visible,
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style.display() == DisplayType::None, true, style.textIndent(), style.direction(), isOverride(style.unicodeBidi()),
|
|
itemHasCustomBackgroundColor ? PopupMenuStyle::CustomBackgroundColor : PopupMenuStyle::DefaultBackgroundColor);
|
|
}
|
|
|
|
void RenderMenuList::getItemBackgroundColor(unsigned listIndex, Color& itemBackgroundColor, bool& itemHasCustomBackgroundColor) const
|
|
{
|
|
const Vector<HTMLElement*>& listItems = selectElement().listItems();
|
|
if (listIndex >= listItems.size()) {
|
|
itemBackgroundColor = style().visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor);
|
|
itemHasCustomBackgroundColor = false;
|
|
return;
|
|
}
|
|
HTMLElement* element = listItems[listIndex];
|
|
|
|
Color backgroundColor = element->computedStyle()->visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor);
|
|
itemHasCustomBackgroundColor = backgroundColor.isValid() && backgroundColor.isVisible();
|
|
// If the item has an opaque background color, return that.
|
|
if (backgroundColor.isOpaque()) {
|
|
itemBackgroundColor = backgroundColor;
|
|
return;
|
|
}
|
|
|
|
// Otherwise, the item's background is overlayed on top of the menu background.
|
|
backgroundColor = blendSourceOver(style().visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor), backgroundColor);
|
|
if (backgroundColor.isOpaque()) {
|
|
itemBackgroundColor = backgroundColor;
|
|
return;
|
|
}
|
|
|
|
// If the menu background is not opaque, then add an opaque white background behind.
|
|
itemBackgroundColor = blendSourceOver(Color::white, backgroundColor);
|
|
}
|
|
|
|
PopupMenuStyle RenderMenuList::menuStyle() const
|
|
{
|
|
const RenderStyle& styleToUse = m_innerBlock ? m_innerBlock->style() : style();
|
|
IntRect absBounds = absoluteBoundingBoxRectIgnoringTransforms();
|
|
return PopupMenuStyle(styleToUse.visitedDependentColorWithColorFilter(CSSPropertyColor), styleToUse.visitedDependentColorWithColorFilter(CSSPropertyBackgroundColor),
|
|
styleToUse.fontCascade(), styleToUse.visibility() == Visibility::Visible, styleToUse.display() == DisplayType::None,
|
|
style().hasAppearance() && style().appearance() == MenulistPart, styleToUse.textIndent(),
|
|
style().direction(), isOverride(style().unicodeBidi()), PopupMenuStyle::DefaultBackgroundColor,
|
|
PopupMenuStyle::SelectPopup, theme().popupMenuSize(styleToUse, absBounds));
|
|
}
|
|
|
|
HostWindow* RenderMenuList::hostWindow() const
|
|
{
|
|
return view().frameView().hostWindow();
|
|
}
|
|
|
|
Ref<Scrollbar> RenderMenuList::createScrollbar(ScrollableArea& scrollableArea, ScrollbarOrientation orientation, ScrollbarControlSize controlSize)
|
|
{
|
|
bool hasCustomScrollbarStyle = style().hasPseudoStyle(PseudoId::Scrollbar);
|
|
if (hasCustomScrollbarStyle)
|
|
return RenderScrollbar::createCustomScrollbar(scrollableArea, orientation, &selectElement());
|
|
return Scrollbar::createNativeScrollbar(scrollableArea, orientation, controlSize);
|
|
}
|
|
|
|
int RenderMenuList::clientInsetLeft() const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int RenderMenuList::clientInsetRight() const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
const int endOfLinePadding = 2;
|
|
|
|
LayoutUnit RenderMenuList::clientPaddingLeft() const
|
|
{
|
|
if ((style().appearance() == MenulistPart || style().appearance() == MenulistButtonPart) && style().direction() == TextDirection::RTL) {
|
|
// 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 paddingLeft() + m_innerBlock->paddingLeft();
|
|
}
|
|
|
|
LayoutUnit RenderMenuList::clientPaddingRight() const
|
|
{
|
|
if ((style().appearance() == MenulistPart || style().appearance() == MenulistButtonPart) && style().direction() == TextDirection::LTR)
|
|
return endOfLinePadding;
|
|
|
|
return paddingRight() + m_innerBlock->paddingRight();
|
|
}
|
|
|
|
int RenderMenuList::listSize() const
|
|
{
|
|
return selectElement().listItems().size();
|
|
}
|
|
|
|
int RenderMenuList::selectedIndex() const
|
|
{
|
|
return selectElement().optionToListIndex(selectElement().selectedIndex());
|
|
}
|
|
|
|
void RenderMenuList::popupDidHide()
|
|
{
|
|
#if !PLATFORM(IOS_FAMILY)
|
|
// PopupMenuMac::show in WebKitLegacy can call this callback even when popup had already been dismissed.
|
|
m_popupIsVisible = false;
|
|
#endif
|
|
}
|
|
|
|
bool RenderMenuList::itemIsSeparator(unsigned listIndex) const
|
|
{
|
|
const Vector<HTMLElement*>& listItems = selectElement().listItems();
|
|
return listIndex < listItems.size() && listItems[listIndex]->hasTagName(hrTag);
|
|
}
|
|
|
|
bool RenderMenuList::itemIsLabel(unsigned listIndex) const
|
|
{
|
|
const Vector<HTMLElement*>& listItems = selectElement().listItems();
|
|
return listIndex < listItems.size() && is<HTMLOptGroupElement>(*listItems[listIndex]);
|
|
}
|
|
|
|
bool RenderMenuList::itemIsSelected(unsigned listIndex) const
|
|
{
|
|
const Vector<HTMLElement*>& listItems = selectElement().listItems();
|
|
if (listIndex >= listItems.size())
|
|
return false;
|
|
HTMLElement* element = listItems[listIndex];
|
|
return is<HTMLOptionElement>(*element) && downcast<HTMLOptionElement>(*element).selected();
|
|
}
|
|
|
|
void RenderMenuList::setTextFromItem(unsigned listIndex)
|
|
{
|
|
setTextFromOption(selectElement().listToOptionIndex(listIndex));
|
|
}
|
|
|
|
FontSelector* RenderMenuList::fontSelector() const
|
|
{
|
|
return &document().fontSelector();
|
|
}
|
|
|
|
#if PLATFORM(IOS_FAMILY)
|
|
void RenderMenuList::layout()
|
|
{
|
|
RenderFlexibleBox::layout();
|
|
|
|
// Ideally, we should not be adjusting styles during layout. However, for a
|
|
// pill-shaped appearance, the horizontal border radius is dependent on the
|
|
// computed height of the box. This means that the appearance cannot be declared
|
|
// prior to layout, since CSS only allows the horizontal border radius to be
|
|
// dependent on the computed width of the box.
|
|
//
|
|
// Ignoring the style's border radius and forcing a pill-shaped appearance at
|
|
// paint time is not an option, since focus rings and tap highlights will not
|
|
// use the correct border radius. Consequently, we need to adjust the border
|
|
// radius here.
|
|
//
|
|
// Note that similar adjustments are made in RenderSliderThumb, RenderButton
|
|
// and RenderTextControlSingleLine.
|
|
RenderThemeIOS::adjustRoundBorderRadius(mutableStyle(), *this);
|
|
}
|
|
#endif
|
|
|
|
}
|