1828 lines
67 KiB
C++
1828 lines
67 KiB
C++
/*
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* (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2019 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
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* Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.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 "RenderText.h"
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#include "AXObjectCache.h"
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#include "BreakLines.h"
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#include "BreakingContext.h"
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#include "CharacterProperties.h"
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#include "DocumentMarkerController.h"
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#include "FloatQuad.h"
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#include "Frame.h"
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#include "FrameView.h"
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#include "HTMLParserIdioms.h"
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#include "Hyphenation.h"
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#include "InlineRunAndOffset.h"
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#include "LayoutIntegrationLineIterator.h"
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#include "LayoutIntegrationLineLayout.h"
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#include "LayoutIntegrationRunIterator.h"
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#include "LegacyEllipsisBox.h"
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#include "Range.h"
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#include "RenderBlock.h"
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#include "RenderCombineText.h"
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#include "RenderInline.h"
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#include "RenderLayer.h"
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#include "RenderView.h"
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#include "RenderedDocumentMarker.h"
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#include "SVGInlineTextBox.h"
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#include "Settings.h"
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#include "Text.h"
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#include "TextResourceDecoder.h"
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#include "VisiblePosition.h"
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#include "WidthIterator.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/NeverDestroyed.h>
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#include <wtf/text/StringBuilder.h>
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#include <wtf/text/TextBreakIterator.h>
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#include <wtf/unicode/CharacterNames.h>
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#if PLATFORM(IOS_FAMILY)
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#include "Document.h"
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#include "EditorClient.h"
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#include "LogicalSelectionOffsetCaches.h"
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#include "Page.h"
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#include "SelectionGeometry.h"
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#endif
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namespace WebCore {
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using namespace WTF::Unicode;
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderText);
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struct SameSizeAsRenderText : public RenderObject {
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void* pointers[2];
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uint32_t bitfields : 16;
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#if ENABLE(TEXT_AUTOSIZING)
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float candidateTextSize;
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#endif
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float widths[4];
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String text;
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};
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COMPILE_ASSERT(sizeof(RenderText) == sizeof(SameSizeAsRenderText), RenderText_should_stay_small);
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class SecureTextTimer final : private TimerBase {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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explicit SecureTextTimer(RenderText&);
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void restart(unsigned offsetAfterLastTypedCharacter);
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unsigned takeOffsetAfterLastTypedCharacter();
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private:
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void fired() override;
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RenderText& m_renderer;
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unsigned m_offsetAfterLastTypedCharacter { 0 };
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};
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typedef HashMap<RenderText*, std::unique_ptr<SecureTextTimer>> SecureTextTimerMap;
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static SecureTextTimerMap& secureTextTimers()
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{
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static NeverDestroyed<SecureTextTimerMap> map;
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return map.get();
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}
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inline SecureTextTimer::SecureTextTimer(RenderText& renderer)
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: m_renderer(renderer)
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{
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}
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inline void SecureTextTimer::restart(unsigned offsetAfterLastTypedCharacter)
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{
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m_offsetAfterLastTypedCharacter = offsetAfterLastTypedCharacter;
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startOneShot(1_s * m_renderer.settings().passwordEchoDurationInSeconds());
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}
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inline unsigned SecureTextTimer::takeOffsetAfterLastTypedCharacter()
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{
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unsigned offset = m_offsetAfterLastTypedCharacter;
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m_offsetAfterLastTypedCharacter = 0;
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return offset;
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}
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void SecureTextTimer::fired()
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{
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ASSERT(secureTextTimers().get(&m_renderer) == this);
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m_offsetAfterLastTypedCharacter = 0;
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m_renderer.setText(m_renderer.text(), true /* forcing setting text as it may be masked later */);
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}
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static HashMap<const RenderText*, String>& originalTextMap()
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{
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static NeverDestroyed<HashMap<const RenderText*, String>> map;
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return map;
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}
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static HashMap<const RenderText*, WeakPtr<RenderInline>>& inlineWrapperForDisplayContentsMap()
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{
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static NeverDestroyed<HashMap<const RenderText*, WeakPtr<RenderInline>>> map;
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return map;
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}
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static constexpr UChar convertNoBreakSpaceToSpace(UChar character)
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{
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return character == noBreakSpace ? ' ' : character;
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}
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String capitalize(const String& string, UChar previousCharacter)
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{
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// FIXME: Change this to use u_strToTitle instead of u_totitle and to consider locale.
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unsigned length = string.length();
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auto& stringImpl = *string.impl();
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static_assert(String::MaxLength < std::numeric_limits<unsigned>::max(), "Must be able to add one without overflowing unsigned");
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// Replace NO BREAK SPACE with a normal spaces since ICU does not treat it as a word separator.
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Vector<UChar> stringWithPrevious(length + 1);
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stringWithPrevious[0] = convertNoBreakSpaceToSpace(previousCharacter);
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for (unsigned i = 1; i < length + 1; i++)
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stringWithPrevious[i] = convertNoBreakSpaceToSpace(stringImpl[i - 1]);
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auto* breakIterator = wordBreakIterator(StringView { stringWithPrevious.data(), length + 1 });
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if (!breakIterator)
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return string;
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StringBuilder result;
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result.reserveCapacity(length);
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int32_t startOfWord = ubrk_first(breakIterator);
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int32_t endOfWord;
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for (endOfWord = ubrk_next(breakIterator); endOfWord != UBRK_DONE; startOfWord = endOfWord, endOfWord = ubrk_next(breakIterator)) {
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if (startOfWord) // Do not append the first character, since it's the previous character, not from this string.
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result.appendCharacter(u_totitle(stringImpl[startOfWord - 1]));
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for (int i = startOfWord + 1; i < endOfWord; i++)
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result.append(stringImpl[i - 1]);
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}
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return result == string ? string : result.toString();
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}
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inline RenderText::RenderText(Node& node, const String& text)
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: RenderObject(node)
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, m_hasTab(false)
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, m_linesDirty(false)
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, m_containsReversedText(false)
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, m_isAllASCII(text.impl()->isAllASCII())
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, m_knownToHaveNoOverflowAndNoFallbackFonts(false)
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, m_useBackslashAsYenSymbol(false)
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, m_originalTextDiffersFromRendered(false)
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, m_hasInlineWrapperForDisplayContents(false)
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, m_text(text)
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{
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ASSERT(!m_text.isNull());
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setIsText();
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m_canUseSimpleFontCodePath = computeCanUseSimpleFontCodePath();
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}
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RenderText::RenderText(Text& textNode, const String& text)
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: RenderText(static_cast<Node&>(textNode), text)
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{
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}
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RenderText::RenderText(Document& document, const String& text)
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: RenderText(static_cast<Node&>(document), text)
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{
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}
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RenderText::~RenderText()
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{
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// Do not add any code here. Add it to willBeDestroyed() instead.
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ASSERT(!originalTextMap().contains(this));
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}
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const char* RenderText::renderName() const
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{
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return "RenderText";
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}
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Text* RenderText::textNode() const
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{
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return downcast<Text>(RenderObject::node());
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}
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bool RenderText::isTextFragment() const
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{
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return false;
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}
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bool RenderText::computeUseBackslashAsYenSymbol() const
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{
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const RenderStyle& style = this->style();
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const auto& fontDescription = style.fontDescription();
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if (style.fontCascade().useBackslashAsYenSymbol())
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return true;
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if (fontDescription.isSpecifiedFont())
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return false;
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const TextEncoding* encoding = document().decoder() ? &document().decoder()->encoding() : 0;
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if (encoding && encoding->backslashAsCurrencySymbol() != '\\')
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return true;
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return false;
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}
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void RenderText::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
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{
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// There is no need to ever schedule repaints from a style change of a text run, since
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// we already did this for the parent of the text run.
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// We do have to schedule layouts, though, since a style change can force us to
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// need to relayout.
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if (diff == StyleDifference::Layout) {
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setNeedsLayoutAndPrefWidthsRecalc();
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m_knownToHaveNoOverflowAndNoFallbackFonts = false;
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}
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const RenderStyle& newStyle = style();
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bool needsResetText = false;
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if (!oldStyle) {
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m_useBackslashAsYenSymbol = computeUseBackslashAsYenSymbol();
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needsResetText = m_useBackslashAsYenSymbol;
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} else if (oldStyle->fontCascade().useBackslashAsYenSymbol() != newStyle.fontCascade().useBackslashAsYenSymbol()) {
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m_useBackslashAsYenSymbol = computeUseBackslashAsYenSymbol();
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needsResetText = true;
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}
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if (!oldStyle || oldStyle->fontCascade() != newStyle.fontCascade())
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m_canUseSimplifiedTextMeasuring = computeCanUseSimplifiedTextMeasuring();
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TextTransform oldTransform = oldStyle ? oldStyle->textTransform() : TextTransform::None;
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TextSecurity oldSecurity = oldStyle ? oldStyle->textSecurity() : TextSecurity::None;
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if (needsResetText || oldTransform != newStyle.textTransform() || oldSecurity != newStyle.textSecurity())
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RenderText::setText(originalText(), true);
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}
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void RenderText::removeAndDestroyTextBoxes()
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{
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if (!renderTreeBeingDestroyed())
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m_lineBoxes.removeAllFromParent(*this);
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#if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED
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else
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m_lineBoxes.invalidateParentChildLists();
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#endif
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deleteLineBoxes();
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}
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void RenderText::willBeDestroyed()
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{
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secureTextTimers().remove(this);
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removeAndDestroyTextBoxes();
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if (m_originalTextDiffersFromRendered)
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originalTextMap().remove(this);
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setInlineWrapperForDisplayContents(nullptr);
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RenderObject::willBeDestroyed();
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}
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String RenderText::originalText() const
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{
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return m_originalTextDiffersFromRendered ? originalTextMap().get(this) : m_text;
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}
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void RenderText::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
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{
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for (auto& run : LayoutIntegration::textRunsFor(*this)) {
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auto rect = run.rect();
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rects.append(enclosingIntRect(FloatRect(accumulatedOffset + rect.location(), rect.size())));
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}
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}
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Vector<IntRect> RenderText::absoluteRectsForRange(unsigned start, unsigned end, bool useSelectionHeight, bool* wasFixed) const
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{
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return absoluteQuadsForRange(start, end, useSelectionHeight, false /* ignoreEmptyTextSelections */, wasFixed).map([](auto& quad) {
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return quad.enclosingBoundingBox();
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});
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}
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#if PLATFORM(IOS_FAMILY)
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// This function is similar in spirit to addLineBoxRects, but returns rectangles
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// which are annotated with additional state which helps the iPhone draw selections in its unique way.
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// Full annotations are added in this class.
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void RenderText::collectSelectionGeometries(Vector<SelectionGeometry>& rects, unsigned start, unsigned end)
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{
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for (auto run = LayoutIntegration::firstTextRunFor(*this); run; run = run.traverseNextTextRun()) {
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LayoutRect rect;
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if (start <= run->start() && run->end() <= end)
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rect = run->selectionRect(start, end);
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else {
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unsigned realEnd = std::min(run->end(), end);
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rect = run->selectionRect(start, realEnd);
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if (rect.isEmpty())
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continue;
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}
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if (run.line()->legacyRootInlineBox() && run.line()->legacyRootInlineBox()->isFirstAfterPageBreak()) {
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if (run->isHorizontal())
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rect.shiftYEdgeTo(run.line()->lineBoxTop());
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else
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rect.shiftXEdgeTo(run.line()->lineBoxTop());
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}
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RenderBlock* containingBlock = this->containingBlock();
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// Map rect, extended left to leftOffset, and right to rightOffset, through transforms to get minX and maxX.
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LogicalSelectionOffsetCaches cache(*containingBlock);
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LayoutUnit leftOffset = containingBlock->logicalLeftSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache);
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LayoutUnit rightOffset = containingBlock->logicalRightSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache);
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LayoutRect extentsRect = rect;
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if (run->isHorizontal()) {
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extentsRect.setX(leftOffset);
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extentsRect.setWidth(rightOffset - leftOffset);
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} else {
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extentsRect.setY(leftOffset);
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extentsRect.setHeight(rightOffset - leftOffset);
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}
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extentsRect = localToAbsoluteQuad(FloatRect(extentsRect)).enclosingBoundingBox();
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if (!run->isHorizontal())
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extentsRect = extentsRect.transposedRect();
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bool isFirstOnLine = !run.previousOnLine();
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bool isLastOnLine = !run.nextOnLine();
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if (containingBlock->isRubyBase() || containingBlock->isRubyText())
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isLastOnLine = !containingBlock->containingBlock()->inlineBoxWrapper()->nextOnLineExists();
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bool containsStart = run->start() <= start && run->end() >= start;
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bool containsEnd = run->start() <= end && run->end() >= end;
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bool isFixed = false;
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auto absoluteQuad = localToAbsoluteQuad(FloatRect(rect), UseTransforms, &isFixed);
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bool boxIsHorizontal = !is<SVGInlineTextBox>(run->legacyInlineBox()) ? run->isHorizontal() : !style().isVerticalWritingMode();
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// If the containing block is an inline element, we want to check the inlineBoxWrapper orientation
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// to determine the orientation of the block. In this case we also use the inlineBoxWrapper to
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// determine if the element is the last on the line.
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if (containingBlock->inlineBoxWrapper()) {
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if (containingBlock->inlineBoxWrapper()->isHorizontal() != boxIsHorizontal) {
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boxIsHorizontal = containingBlock->inlineBoxWrapper()->isHorizontal();
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isLastOnLine = !containingBlock->inlineBoxWrapper()->nextOnLineExists();
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}
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}
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rects.append(SelectionGeometry(absoluteQuad, HTMLElement::selectionRenderingBehavior(textNode()), run->direction(), extentsRect.x(), extentsRect.maxX(), extentsRect.maxY(), 0, run->isLineBreak(), isFirstOnLine, isLastOnLine, containsStart, containsEnd, boxIsHorizontal, isFixed, containingBlock->isRubyText(), view().pageNumberForBlockProgressionOffset(absoluteQuad.enclosingBoundingBox().x())));
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}
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}
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#endif
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static FloatRect boundariesForTextRun(const LayoutIntegration::PathTextRun& run)
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{
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if (is<SVGInlineTextBox>(run.legacyInlineBox()))
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return downcast<SVGInlineTextBox>(*run.legacyInlineBox()).calculateBoundaries();
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return run.rect();
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}
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static IntRect ellipsisRectForTextRun(const LayoutIntegration::PathTextRun& run, unsigned start, unsigned end)
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{
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// FIXME: No ellipsis support in modern path yet.
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if (!run.legacyInlineBox())
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return { };
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auto& box = *run.legacyInlineBox();
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unsigned short truncation = box.truncation();
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if (truncation == cNoTruncation)
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return { };
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auto ellipsis = box.root().ellipsisBox();
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if (!ellipsis)
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return { };
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int ellipsisStartPosition = std::max<int>(start - box.start(), 0);
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int ellipsisEndPosition = std::min<int>(end - box.start(), box.len());
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// The ellipsis should be considered to be selected if the end of
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// the selection is past the beginning of the truncation and the
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// beginning of the selection is before or at the beginning of the truncation.
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if (ellipsisEndPosition < truncation && ellipsisStartPosition > truncation)
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return { };
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return ellipsis->selectionRect();
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}
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enum class ClippingOption { NoClipping, ClipToEllipsis };
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// FIXME: Unify with absoluteQuadsForRange.
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static Vector<FloatQuad> collectAbsoluteQuads(const RenderText& textRenderer, bool* wasFixed, ClippingOption clipping)
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{
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Vector<FloatQuad> quads;
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for (auto& run : LayoutIntegration::textRunsFor(textRenderer)) {
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auto boundaries = boundariesForTextRun(run);
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// Shorten the width of this text box if it ends in an ellipsis.
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if (clipping == ClippingOption::ClipToEllipsis) {
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auto ellipsisRect = ellipsisRectForTextRun(run, 0, textRenderer.text().length());
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if (!ellipsisRect.isEmpty()) {
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if (textRenderer.style().isHorizontalWritingMode())
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boundaries.setWidth(ellipsisRect.maxX() - boundaries.x());
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else
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boundaries.setHeight(ellipsisRect.maxY() - boundaries.y());
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}
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}
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quads.append(textRenderer.localToAbsoluteQuad(boundaries, UseTransforms, wasFixed));
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}
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return quads;
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}
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Vector<FloatQuad> RenderText::absoluteQuadsClippedToEllipsis() const
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{
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return collectAbsoluteQuads(*this, nullptr, ClippingOption::ClipToEllipsis);
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}
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void RenderText::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
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{
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quads.appendVector(collectAbsoluteQuads(*this, wasFixed, ClippingOption::NoClipping));
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}
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static FloatRect localQuadForTextRun(const LayoutIntegration::PathTextRun& run, unsigned start, unsigned end, bool useSelectionHeight)
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{
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unsigned realEnd = std::min(run.end(), end);
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LayoutRect boxSelectionRect = run.selectionRect(start, realEnd);
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if (!boxSelectionRect.height())
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return { };
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if (useSelectionHeight)
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return boxSelectionRect;
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auto rect = run.rect();
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if (run.isHorizontal()) {
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boxSelectionRect.setHeight(rect.height());
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boxSelectionRect.setY(rect.y());
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} else {
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boxSelectionRect.setWidth(rect.width());
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boxSelectionRect.setX(rect.x());
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}
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return boxSelectionRect;
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}
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Vector<FloatQuad> RenderText::absoluteQuadsForRange(unsigned start, unsigned end, bool useSelectionHeight, bool ignoreEmptyTextSelections, bool* wasFixed) const
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{
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// Work around signed/unsigned issues. This function takes unsigneds, and is often passed UINT_MAX
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// to mean "all the way to the end". LegacyInlineTextBox coordinates are unsigneds, so changing this
|
|
// function to take ints causes various internal mismatches. But selectionRect takes ints, and
|
|
// passing UINT_MAX to it causes trouble. Ideally we'd change selectionRect to take unsigneds, but
|
|
// that would cause many ripple effects, so for now we'll just clamp our unsigned parameters to INT_MAX.
|
|
ASSERT(end == UINT_MAX || end <= INT_MAX);
|
|
ASSERT(start <= INT_MAX);
|
|
start = std::min(start, static_cast<unsigned>(INT_MAX));
|
|
end = std::min(end, static_cast<unsigned>(INT_MAX));
|
|
|
|
Vector<FloatQuad> quads;
|
|
for (auto& run : LayoutIntegration::textRunsFor(*this)) {
|
|
if (ignoreEmptyTextSelections && !run.isSelectable(start, end))
|
|
continue;
|
|
if (start <= run.start() && run.end() <= end) {
|
|
auto boundaries = boundariesForTextRun(run);
|
|
|
|
if (useSelectionHeight) {
|
|
LayoutRect selectionRect = run.selectionRect(start, end);
|
|
if (run.isHorizontal()) {
|
|
boundaries.setHeight(selectionRect.height());
|
|
boundaries.setY(selectionRect.y());
|
|
} else {
|
|
boundaries.setWidth(selectionRect.width());
|
|
boundaries.setX(selectionRect.x());
|
|
}
|
|
}
|
|
quads.append(localToAbsoluteQuad(boundaries, UseTransforms, wasFixed));
|
|
continue;
|
|
}
|
|
FloatRect rect = localQuadForTextRun(run, start, end, useSelectionHeight);
|
|
if (!rect.isZero())
|
|
quads.append(localToAbsoluteQuad(rect, UseTransforms, wasFixed));
|
|
}
|
|
return quads;
|
|
}
|
|
|
|
Position RenderText::positionForPoint(const LayoutPoint& point)
|
|
{
|
|
return positionForPoint(point, nullptr).deepEquivalent();
|
|
}
|
|
|
|
enum ShouldAffinityBeDownstream { AlwaysDownstream, AlwaysUpstream, UpstreamIfPositionIsNotAtStart };
|
|
|
|
static bool lineDirectionPointFitsInBox(int pointLineDirection, const LayoutIntegration::TextRunIterator& textRun, ShouldAffinityBeDownstream& shouldAffinityBeDownstream)
|
|
{
|
|
shouldAffinityBeDownstream = AlwaysDownstream;
|
|
|
|
// the x coordinate is equal to the left edge of this box
|
|
// the affinity must be downstream so the position doesn't jump back to the previous line
|
|
// except when box is the first box in the line
|
|
if (pointLineDirection <= textRun->logicalLeft()) {
|
|
shouldAffinityBeDownstream = !textRun.previousOnLine() ? UpstreamIfPositionIsNotAtStart : AlwaysDownstream;
|
|
return true;
|
|
}
|
|
|
|
#if !PLATFORM(IOS_FAMILY)
|
|
// and the x coordinate is to the left of the right edge of this box
|
|
// check to see if position goes in this box
|
|
if (pointLineDirection < textRun->logicalRight()) {
|
|
shouldAffinityBeDownstream = UpstreamIfPositionIsNotAtStart;
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
// box is first on line
|
|
// and the x coordinate is to the left of the first text box left edge
|
|
if (!textRun.previousOnLineIgnoringLineBreak() && pointLineDirection < textRun->logicalLeft())
|
|
return true;
|
|
|
|
if (!textRun.nextOnLineIgnoringLineBreak()) {
|
|
// box is last on line
|
|
// and the x coordinate is to the right of the last text box right edge
|
|
// generate VisiblePosition, use Affinity::Upstream affinity if possible
|
|
shouldAffinityBeDownstream = UpstreamIfPositionIsNotAtStart;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static VisiblePosition createVisiblePositionForBox(const LayoutIntegration::RunIterator& run, unsigned offset, ShouldAffinityBeDownstream shouldAffinityBeDownstream)
|
|
{
|
|
auto affinity = VisiblePosition::defaultAffinity;
|
|
switch (shouldAffinityBeDownstream) {
|
|
case AlwaysDownstream:
|
|
affinity = Affinity::Downstream;
|
|
break;
|
|
case AlwaysUpstream:
|
|
affinity = Affinity::Upstream;
|
|
break;
|
|
case UpstreamIfPositionIsNotAtStart:
|
|
affinity = offset > run->minimumCaretOffset() ? Affinity::Upstream : Affinity::Downstream;
|
|
break;
|
|
}
|
|
return run->renderer().createVisiblePosition(offset, affinity);
|
|
}
|
|
|
|
static VisiblePosition createVisiblePositionAfterAdjustingOffsetForBiDi(const LayoutIntegration::TextRunIterator& run, unsigned offset, ShouldAffinityBeDownstream shouldAffinityBeDownstream)
|
|
{
|
|
if (offset && offset < run->length())
|
|
return createVisiblePositionForBox(run, run->start() + offset, shouldAffinityBeDownstream);
|
|
|
|
bool positionIsAtStartOfBox = !offset;
|
|
if (positionIsAtStartOfBox == run->isLeftToRightDirection()) {
|
|
// offset is on the left edge
|
|
|
|
auto previousRun = run.previousOnLineIgnoringLineBreak();
|
|
if ((previousRun && previousRun->bidiLevel() == run->bidiLevel())
|
|
|| run->renderer().containingBlock()->style().direction() == run->direction()) // FIXME: left on 12CBA
|
|
return createVisiblePositionForBox(run, run->leftmostCaretOffset(), shouldAffinityBeDownstream);
|
|
|
|
if (previousRun && previousRun->bidiLevel() > run->bidiLevel()) {
|
|
// e.g. left of B in aDC12BAb
|
|
auto leftmostRun = previousRun;
|
|
for (; previousRun; previousRun.traversePreviousOnLineIgnoringLineBreak()) {
|
|
if (previousRun->bidiLevel() <= run->bidiLevel())
|
|
break;
|
|
leftmostRun = previousRun;
|
|
}
|
|
return createVisiblePositionForBox(leftmostRun, leftmostRun->rightmostCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
if (!previousRun || previousRun->bidiLevel() < run->bidiLevel()) {
|
|
// e.g. left of D in aDC12BAb
|
|
LayoutIntegration::RunIterator rightmostRun = run;
|
|
for (auto nextRun = run.nextOnLineIgnoringLineBreak(); nextRun; nextRun.traverseNextOnLineIgnoringLineBreak()) {
|
|
if (nextRun->bidiLevel() < run->bidiLevel())
|
|
break;
|
|
rightmostRun = nextRun;
|
|
}
|
|
return createVisiblePositionForBox(rightmostRun,
|
|
run->isLeftToRightDirection() ? rightmostRun->maximumCaretOffset() : rightmostRun->minimumCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
return createVisiblePositionForBox(run, run->rightmostCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
auto nextRun = run.nextOnLineIgnoringLineBreak();
|
|
if ((nextRun && nextRun->bidiLevel() == run->bidiLevel())
|
|
|| run->renderer().containingBlock()->style().direction() == run->direction())
|
|
return createVisiblePositionForBox(run, run->rightmostCaretOffset(), shouldAffinityBeDownstream);
|
|
|
|
// offset is on the right edge
|
|
if (nextRun && nextRun->bidiLevel() > run->bidiLevel()) {
|
|
// e.g. right of C in aDC12BAb
|
|
auto rightmostRun = nextRun;
|
|
for (; nextRun; nextRun.traverseNextOnLineIgnoringLineBreak()) {
|
|
if (nextRun->bidiLevel() <= run->bidiLevel())
|
|
break;
|
|
rightmostRun = nextRun;
|
|
}
|
|
|
|
return createVisiblePositionForBox(rightmostRun, rightmostRun->leftmostCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
if (!nextRun || nextRun->bidiLevel() < run->bidiLevel()) {
|
|
// e.g. right of A in aDC12BAb
|
|
LayoutIntegration::RunIterator leftmostRun = run;
|
|
for (auto previousRun = run.previousOnLineIgnoringLineBreak(); previousRun; previousRun.traversePreviousOnLineIgnoringLineBreak()) {
|
|
if (previousRun->bidiLevel() < run->bidiLevel())
|
|
break;
|
|
leftmostRun = previousRun;
|
|
}
|
|
|
|
return createVisiblePositionForBox(leftmostRun,
|
|
run->isLeftToRightDirection() ? leftmostRun->minimumCaretOffset() : leftmostRun->maximumCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
return createVisiblePositionForBox(run, run->leftmostCaretOffset(), shouldAffinityBeDownstream);
|
|
}
|
|
|
|
|
|
VisiblePosition RenderText::positionForPoint(const LayoutPoint& point, const RenderFragmentContainer*)
|
|
{
|
|
auto firstRun = LayoutIntegration::firstTextRunFor(*this);
|
|
|
|
if (!firstRun || !text().length())
|
|
return createVisiblePosition(0, Affinity::Downstream);
|
|
|
|
LayoutUnit pointLineDirection = firstRun->isHorizontal() ? point.x() : point.y();
|
|
LayoutUnit pointBlockDirection = firstRun->isHorizontal() ? point.y() : point.x();
|
|
bool blocksAreFlipped = style().isFlippedBlocksWritingMode();
|
|
|
|
LayoutIntegration::TextRunIterator lastRun;
|
|
for (auto run = firstRun; run; run.traverseNextTextRun()) {
|
|
if (run->isLineBreak() && !run.previousOnLine() && run.nextOnLine() && !run.nextOnLine()->isLineBreak())
|
|
run.traverseNextTextRun();
|
|
|
|
auto line = run.line();
|
|
LayoutUnit top = std::min(line->selectionTopForHitTesting(), line->top());
|
|
if (pointBlockDirection > top || (!blocksAreFlipped && pointBlockDirection == top)) {
|
|
LayoutUnit bottom = line->selectionBottom();
|
|
if (auto nextLine = line.next())
|
|
bottom = std::min(bottom, nextLine->top());
|
|
|
|
if (pointBlockDirection < bottom || (blocksAreFlipped && pointBlockDirection == bottom)) {
|
|
ShouldAffinityBeDownstream shouldAffinityBeDownstream;
|
|
#if PLATFORM(IOS_FAMILY)
|
|
if (pointLineDirection != run->logicalLeft() && point.x() < run->rect().x() + run->logicalWidth()) {
|
|
int half = run->rect().x() + run->logicalWidth() / 2;
|
|
auto affinity = point.x() < half ? Affinity::Downstream : Affinity::Upstream;
|
|
return createVisiblePosition(run->offsetForPosition(pointLineDirection) + run->start(), affinity);
|
|
}
|
|
#endif
|
|
if (lineDirectionPointFitsInBox(pointLineDirection, run, shouldAffinityBeDownstream))
|
|
return createVisiblePositionAfterAdjustingOffsetForBiDi(run, run->offsetForPosition(pointLineDirection), shouldAffinityBeDownstream);
|
|
}
|
|
}
|
|
lastRun = run;
|
|
}
|
|
|
|
if (lastRun) {
|
|
ShouldAffinityBeDownstream shouldAffinityBeDownstream;
|
|
lineDirectionPointFitsInBox(pointLineDirection, lastRun, shouldAffinityBeDownstream);
|
|
return createVisiblePositionAfterAdjustingOffsetForBiDi(lastRun, lastRun->offsetForPosition(pointLineDirection) + lastRun->start(), shouldAffinityBeDownstream);
|
|
}
|
|
return createVisiblePosition(0, Affinity::Downstream);
|
|
}
|
|
|
|
ALWAYS_INLINE float RenderText::widthFromCache(const FontCascade& f, unsigned start, unsigned len, float xPos, HashSet<const Font*>* fallbackFonts, GlyphOverflow* glyphOverflow, const RenderStyle& style) const
|
|
{
|
|
if (style.hasTextCombine() && is<RenderCombineText>(*this)) {
|
|
const RenderCombineText& combineText = downcast<RenderCombineText>(*this);
|
|
if (combineText.isCombined())
|
|
return combineText.combinedTextWidth(f);
|
|
}
|
|
|
|
TextRun run = RenderBlock::constructTextRun(*this, start, len, style);
|
|
run.setCharacterScanForCodePath(!canUseSimpleFontCodePath());
|
|
run.setTabSize(!style.collapseWhiteSpace(), style.tabSize());
|
|
run.setXPos(xPos);
|
|
return f.width(run, fallbackFonts, glyphOverflow);
|
|
}
|
|
|
|
inline bool isHangablePunctuationAtLineStart(UChar c)
|
|
{
|
|
return U_GET_GC_MASK(c) & (U_GC_PS_MASK | U_GC_PI_MASK | U_GC_PF_MASK);
|
|
}
|
|
|
|
inline bool isHangablePunctuationAtLineEnd(UChar c)
|
|
{
|
|
return U_GET_GC_MASK(c) & (U_GC_PE_MASK | U_GC_PI_MASK | U_GC_PF_MASK);
|
|
}
|
|
|
|
float RenderText::hangablePunctuationStartWidth(unsigned index) const
|
|
{
|
|
unsigned length = text().length();
|
|
if (index >= length)
|
|
return 0;
|
|
|
|
if (!isHangablePunctuationAtLineStart(text()[index]))
|
|
return 0;
|
|
|
|
auto& style = this->style();
|
|
return widthFromCache(style.fontCascade(), index, 1, 0, 0, 0, style);
|
|
}
|
|
|
|
float RenderText::hangablePunctuationEndWidth(unsigned index) const
|
|
{
|
|
unsigned length = text().length();
|
|
if (index >= length)
|
|
return 0;
|
|
|
|
if (!isHangablePunctuationAtLineEnd(text()[index]))
|
|
return 0;
|
|
|
|
auto& style = this->style();
|
|
return widthFromCache(style.fontCascade(), index, 1, 0, 0, 0, style);
|
|
}
|
|
|
|
bool RenderText::isHangableStopOrComma(UChar c)
|
|
{
|
|
return c == 0x002C || c == 0x002E || c == 0x060C || c == 0x06D4 || c == 0x3001
|
|
|| c == 0x3002 || c == 0xFF0C || c == 0xFF0E || c == 0xFE50 || c == 0xFE51
|
|
|| c == 0xFE52 || c == 0xFF61 || c == 0xFF64;
|
|
}
|
|
|
|
unsigned RenderText::firstCharacterIndexStrippingSpaces() const
|
|
{
|
|
if (!style().collapseWhiteSpace())
|
|
return 0;
|
|
|
|
unsigned i = 0;
|
|
for (unsigned length = text().length() ; i < length; ++i) {
|
|
if (text()[i] != ' ' && (text()[i] != '\n' || style().preserveNewline()) && text()[i] != '\t')
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
unsigned RenderText::lastCharacterIndexStrippingSpaces() const
|
|
{
|
|
if (!text().length())
|
|
return 0;
|
|
|
|
if (!style().collapseWhiteSpace())
|
|
return text().length() - 1;
|
|
|
|
int i = text().length() - 1;
|
|
for ( ; i >= 0; --i) {
|
|
if (text()[i] != ' ' && (text()[i] != '\n' || style().preserveNewline()) && text()[i] != '\t')
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
RenderText::Widths RenderText::trimmedPreferredWidths(float leadWidth, bool& stripFrontSpaces)
|
|
{
|
|
auto& style = this->style();
|
|
bool collapseWhiteSpace = style.collapseWhiteSpace();
|
|
|
|
if (!collapseWhiteSpace)
|
|
stripFrontSpaces = false;
|
|
|
|
if (m_hasTab || preferredLogicalWidthsDirty())
|
|
computePreferredLogicalWidths(leadWidth);
|
|
|
|
Widths widths;
|
|
|
|
widths.beginWS = !stripFrontSpaces && m_hasBeginWS;
|
|
widths.endWS = m_hasEndWS;
|
|
|
|
unsigned length = this->length();
|
|
|
|
if (!length || (stripFrontSpaces && text().isAllSpecialCharacters<isHTMLSpace>()))
|
|
return widths;
|
|
|
|
widths.min = m_minWidth;
|
|
widths.max = m_maxWidth;
|
|
|
|
widths.beginMin = m_beginMinWidth;
|
|
widths.endMin = m_endMinWidth;
|
|
|
|
widths.hasBreakableChar = m_hasBreakableChar;
|
|
widths.hasBreak = m_hasBreak;
|
|
|
|
if (text()[0] == ' ' || (text()[0] == '\n' && !style.preserveNewline()) || text()[0] == '\t') {
|
|
auto& font = style.fontCascade(); // FIXME: This ignores first-line.
|
|
if (stripFrontSpaces)
|
|
widths.max -= font.width(RenderBlock::constructTextRun(&space, 1, style));
|
|
else
|
|
widths.max += font.wordSpacing();
|
|
}
|
|
|
|
stripFrontSpaces = collapseWhiteSpace && m_hasEndWS;
|
|
|
|
if (!style.autoWrap() || widths.min > widths.max)
|
|
widths.min = widths.max;
|
|
|
|
// Compute our max widths by scanning the string for newlines.
|
|
if (widths.hasBreak) {
|
|
auto& font = style.fontCascade(); // FIXME: This ignores first-line.
|
|
bool firstLine = true;
|
|
widths.beginMax = widths.max;
|
|
widths.endMax = widths.max;
|
|
for (unsigned i = 0; i < length; i++) {
|
|
unsigned lineLength = 0;
|
|
while (i + lineLength < length && text()[i + lineLength] != '\n')
|
|
lineLength++;
|
|
|
|
if (lineLength) {
|
|
widths.endMax = widthFromCache(font, i, lineLength, leadWidth + widths.endMax, 0, 0, style);
|
|
if (firstLine) {
|
|
firstLine = false;
|
|
leadWidth = 0;
|
|
widths.beginMax = widths.endMax;
|
|
}
|
|
i += lineLength;
|
|
} else if (firstLine) {
|
|
widths.beginMax = 0;
|
|
firstLine = false;
|
|
leadWidth = 0;
|
|
}
|
|
|
|
if (i == length - 1) {
|
|
// A <pre> run that ends with a newline, as in, e.g.,
|
|
// <pre>Some text\n\n<span>More text</pre>
|
|
widths.endMax = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return widths;
|
|
}
|
|
|
|
static inline bool isSpaceAccordingToStyle(UChar c, const RenderStyle& style)
|
|
{
|
|
return c == ' ' || (c == noBreakSpace && style.nbspMode() == NBSPMode::Space);
|
|
}
|
|
|
|
float RenderText::minLogicalWidth() const
|
|
{
|
|
if (preferredLogicalWidthsDirty())
|
|
const_cast<RenderText*>(this)->computePreferredLogicalWidths(0);
|
|
|
|
return m_minWidth;
|
|
}
|
|
|
|
float RenderText::maxLogicalWidth() const
|
|
{
|
|
if (preferredLogicalWidthsDirty())
|
|
const_cast<RenderText*>(this)->computePreferredLogicalWidths(0);
|
|
|
|
return m_maxWidth;
|
|
}
|
|
|
|
LineBreakIteratorMode mapLineBreakToIteratorMode(LineBreak lineBreak)
|
|
{
|
|
switch (lineBreak) {
|
|
case LineBreak::Auto:
|
|
case LineBreak::AfterWhiteSpace:
|
|
case LineBreak::Anywhere:
|
|
return LineBreakIteratorMode::Default;
|
|
case LineBreak::Loose:
|
|
return LineBreakIteratorMode::Loose;
|
|
case LineBreak::Normal:
|
|
return LineBreakIteratorMode::Normal;
|
|
case LineBreak::Strict:
|
|
return LineBreakIteratorMode::Strict;
|
|
}
|
|
ASSERT_NOT_REACHED();
|
|
return LineBreakIteratorMode::Default;
|
|
}
|
|
|
|
void RenderText::computePreferredLogicalWidths(float leadWidth)
|
|
{
|
|
HashSet<const Font*> fallbackFonts;
|
|
GlyphOverflow glyphOverflow;
|
|
computePreferredLogicalWidths(leadWidth, fallbackFonts, glyphOverflow);
|
|
if (fallbackFonts.isEmpty() && !glyphOverflow.left && !glyphOverflow.right && !glyphOverflow.top && !glyphOverflow.bottom)
|
|
m_knownToHaveNoOverflowAndNoFallbackFonts = true;
|
|
}
|
|
|
|
static inline float hyphenWidth(RenderText& renderer, const FontCascade& font)
|
|
{
|
|
const RenderStyle& style = renderer.style();
|
|
auto textRun = RenderBlock::constructTextRun(style.hyphenString().string(), style);
|
|
return font.width(textRun);
|
|
}
|
|
|
|
static float maxWordFragmentWidth(RenderText& renderer, const RenderStyle& style, const FontCascade& font, StringView word, unsigned minimumPrefixLength, unsigned minimumSuffixLength, unsigned& suffixStart, HashSet<const Font*>& fallbackFonts, GlyphOverflow& glyphOverflow)
|
|
{
|
|
suffixStart = 0;
|
|
if (word.length() <= minimumSuffixLength)
|
|
return 0;
|
|
|
|
Vector<int, 8> hyphenLocations;
|
|
ASSERT(word.length() >= minimumSuffixLength);
|
|
unsigned hyphenLocation = word.length() - minimumSuffixLength;
|
|
while ((hyphenLocation = lastHyphenLocation(word, hyphenLocation, style.computedLocale())) >= std::max(minimumPrefixLength, 1U))
|
|
hyphenLocations.append(hyphenLocation);
|
|
|
|
if (hyphenLocations.isEmpty())
|
|
return 0;
|
|
|
|
hyphenLocations.reverse();
|
|
|
|
// FIXME: Breaking the string at these places in the middle of words is completely broken with complex text.
|
|
float minimumFragmentWidthToConsider = font.pixelSize() * 5 / 4 + hyphenWidth(renderer, font);
|
|
float maxFragmentWidth = 0;
|
|
for (size_t k = 0; k < hyphenLocations.size(); ++k) {
|
|
int fragmentLength = hyphenLocations[k] - suffixStart;
|
|
StringBuilder fragmentWithHyphen;
|
|
fragmentWithHyphen.append(word.substring(suffixStart, fragmentLength));
|
|
fragmentWithHyphen.append(style.hyphenString());
|
|
|
|
TextRun run = RenderBlock::constructTextRun(fragmentWithHyphen.toString(), style);
|
|
run.setCharacterScanForCodePath(!renderer.canUseSimpleFontCodePath());
|
|
float fragmentWidth = font.width(run, &fallbackFonts, &glyphOverflow);
|
|
|
|
// Narrow prefixes are ignored. See tryHyphenating in RenderBlockLineLayout.cpp.
|
|
if (fragmentWidth <= minimumFragmentWidthToConsider)
|
|
continue;
|
|
|
|
suffixStart += fragmentLength;
|
|
maxFragmentWidth = std::max(maxFragmentWidth, fragmentWidth);
|
|
}
|
|
|
|
return maxFragmentWidth;
|
|
}
|
|
|
|
void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Font*>& fallbackFonts, GlyphOverflow& glyphOverflow)
|
|
{
|
|
ASSERT(m_hasTab || preferredLogicalWidthsDirty() || !m_knownToHaveNoOverflowAndNoFallbackFonts);
|
|
|
|
m_minWidth = 0;
|
|
m_beginMinWidth = 0;
|
|
m_endMinWidth = 0;
|
|
m_maxWidth = 0;
|
|
|
|
float currMaxWidth = 0;
|
|
m_hasBreakableChar = false;
|
|
m_hasBreak = false;
|
|
m_hasTab = false;
|
|
m_hasBeginWS = false;
|
|
m_hasEndWS = false;
|
|
|
|
auto& style = this->style();
|
|
auto& font = style.fontCascade(); // FIXME: This ignores first-line.
|
|
float wordSpacing = font.wordSpacing();
|
|
auto& string = text();
|
|
unsigned length = string.length();
|
|
auto iteratorMode = mapLineBreakToIteratorMode(style.lineBreak());
|
|
LazyLineBreakIterator breakIterator(string, style.computedLocale(), iteratorMode);
|
|
bool needsWordSpacing = false;
|
|
bool ignoringSpaces = false;
|
|
bool isSpace = false;
|
|
bool firstWord = true;
|
|
bool firstLine = true;
|
|
std::optional<unsigned> nextBreakable;
|
|
unsigned lastWordBoundary = 0;
|
|
|
|
WordTrailingSpace wordTrailingSpace(style);
|
|
// If automatic hyphenation is allowed, we keep track of the width of the widest word (or word
|
|
// fragment) encountered so far, and only try hyphenating words that are wider.
|
|
float maxWordWidth = std::numeric_limits<float>::max();
|
|
unsigned minimumPrefixLength = 0;
|
|
unsigned minimumSuffixLength = 0;
|
|
if (style.hyphens() == Hyphens::Auto && canHyphenate(style.computedLocale())) {
|
|
maxWordWidth = 0;
|
|
|
|
// Map 'hyphenate-limit-{before,after}: auto;' to 2.
|
|
auto before = style.hyphenationLimitBefore();
|
|
minimumPrefixLength = before < 0 ? 2 : before;
|
|
|
|
auto after = style.hyphenationLimitAfter();
|
|
minimumSuffixLength = after < 0 ? 2 : after;
|
|
}
|
|
|
|
std::optional<LayoutUnit> firstGlyphLeftOverflow;
|
|
|
|
bool breakNBSP = style.autoWrap() && style.nbspMode() == NBSPMode::Space;
|
|
|
|
// Note the deliberate omission of word-wrap and overflow-wrap from this breakAll check. Those
|
|
// do not affect minimum preferred sizes. Note that break-word is a non-standard value for
|
|
// word-break, but we support it as though it means break-all.
|
|
bool breakAnywhere = style.lineBreak() == LineBreak::Anywhere && style.autoWrap();
|
|
bool breakAll = (style.wordBreak() == WordBreak::BreakAll || style.wordBreak() == WordBreak::BreakWord) && style.autoWrap();
|
|
bool keepAllWords = style.wordBreak() == WordBreak::KeepAll;
|
|
bool canUseLineBreakShortcut = iteratorMode == LineBreakIteratorMode::Default;
|
|
|
|
for (unsigned i = 0; i < length; i++) {
|
|
UChar c = string[i];
|
|
|
|
bool previousCharacterIsSpace = isSpace;
|
|
|
|
bool isNewline = false;
|
|
if (c == '\n') {
|
|
if (style.preserveNewline()) {
|
|
m_hasBreak = true;
|
|
isNewline = true;
|
|
isSpace = false;
|
|
} else
|
|
isSpace = true;
|
|
} else if (c == '\t') {
|
|
if (!style.collapseWhiteSpace()) {
|
|
m_hasTab = true;
|
|
isSpace = false;
|
|
} else
|
|
isSpace = true;
|
|
} else
|
|
isSpace = c == ' ';
|
|
|
|
if ((isSpace || isNewline) && !i)
|
|
m_hasBeginWS = true;
|
|
if ((isSpace || isNewline) && i == length - 1)
|
|
m_hasEndWS = true;
|
|
|
|
ignoringSpaces |= style.collapseWhiteSpace() && previousCharacterIsSpace && isSpace;
|
|
ignoringSpaces &= isSpace;
|
|
|
|
// Ignore spaces and soft hyphens
|
|
if (ignoringSpaces) {
|
|
ASSERT(lastWordBoundary == i);
|
|
lastWordBoundary++;
|
|
continue;
|
|
} else if (c == softHyphen && style.hyphens() != Hyphens::None) {
|
|
ASSERT(i >= lastWordBoundary);
|
|
currMaxWidth += widthFromCache(font, lastWordBoundary, i - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
|
|
if (!firstGlyphLeftOverflow)
|
|
firstGlyphLeftOverflow = glyphOverflow.left;
|
|
lastWordBoundary = i + 1;
|
|
continue;
|
|
}
|
|
|
|
bool hasBreak = breakAll || isBreakable(breakIterator, i, nextBreakable, breakNBSP, canUseLineBreakShortcut, keepAllWords, breakAnywhere);
|
|
bool betweenWords = true;
|
|
unsigned j = i;
|
|
while (c != '\n' && !isSpaceAccordingToStyle(c, style) && c != '\t' && (c != softHyphen || style.hyphens() == Hyphens::None)) {
|
|
j++;
|
|
if (j == length)
|
|
break;
|
|
c = string[j];
|
|
if (isBreakable(breakIterator, j, nextBreakable, breakNBSP, canUseLineBreakShortcut, keepAllWords, breakAnywhere) && characterAt(j - 1) != softHyphen)
|
|
break;
|
|
if (breakAll) {
|
|
betweenWords = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
unsigned wordLen = j - i;
|
|
if (wordLen) {
|
|
float currMinWidth = 0;
|
|
bool isSpace = (j < length) && isSpaceAccordingToStyle(c, style);
|
|
float w;
|
|
std::optional<float> wordTrailingSpaceWidth;
|
|
if (isSpace)
|
|
wordTrailingSpaceWidth = wordTrailingSpace.width(fallbackFonts);
|
|
if (wordTrailingSpaceWidth)
|
|
w = widthFromCache(font, i, wordLen + 1, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style) - wordTrailingSpaceWidth.value();
|
|
else {
|
|
w = widthFromCache(font, i, wordLen, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
|
|
if (c == softHyphen && style.hyphens() != Hyphens::None)
|
|
currMinWidth = hyphenWidth(*this, font);
|
|
}
|
|
|
|
if (w > maxWordWidth) {
|
|
unsigned suffixStart;
|
|
float maxFragmentWidth = maxWordFragmentWidth(*this, style, font, StringView(string).substring(i, wordLen), minimumPrefixLength, minimumSuffixLength, suffixStart, fallbackFonts, glyphOverflow);
|
|
|
|
if (suffixStart) {
|
|
float suffixWidth;
|
|
std::optional<float> wordTrailingSpaceWidth;
|
|
if (isSpace)
|
|
wordTrailingSpaceWidth = wordTrailingSpace.width(fallbackFonts);
|
|
if (wordTrailingSpaceWidth)
|
|
suffixWidth = widthFromCache(font, i + suffixStart, wordLen - suffixStart + 1, leadWidth + currMaxWidth, 0, 0, style) - wordTrailingSpaceWidth.value();
|
|
else
|
|
suffixWidth = widthFromCache(font, i + suffixStart, wordLen - suffixStart, leadWidth + currMaxWidth, 0, 0, style);
|
|
|
|
maxFragmentWidth = std::max(maxFragmentWidth, suffixWidth);
|
|
|
|
currMinWidth += maxFragmentWidth - w;
|
|
maxWordWidth = std::max(maxWordWidth, maxFragmentWidth);
|
|
} else
|
|
maxWordWidth = w;
|
|
}
|
|
|
|
if (!firstGlyphLeftOverflow)
|
|
firstGlyphLeftOverflow = glyphOverflow.left;
|
|
currMinWidth += w;
|
|
if (betweenWords) {
|
|
if (lastWordBoundary == i)
|
|
currMaxWidth += w;
|
|
else {
|
|
ASSERT(j >= lastWordBoundary);
|
|
currMaxWidth += widthFromCache(font, lastWordBoundary, j - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
|
|
}
|
|
lastWordBoundary = j;
|
|
}
|
|
|
|
bool isCollapsibleWhiteSpace = (j < length) && style.isCollapsibleWhiteSpace(c);
|
|
if (j < length && style.autoWrap())
|
|
m_hasBreakableChar = true;
|
|
|
|
// Add in wordSpacing to our currMaxWidth, but not if this is the last word on a line or the
|
|
// last word in the run.
|
|
if ((isSpace || isCollapsibleWhiteSpace) && !containsOnlyHTMLWhitespace(j, length - j))
|
|
currMaxWidth += wordSpacing;
|
|
|
|
if (firstWord) {
|
|
firstWord = false;
|
|
// If the first character in the run is breakable, then we consider ourselves to have a beginning
|
|
// minimum width of 0, since a break could occur right before our run starts, preventing us from ever
|
|
// being appended to a previous text run when considering the total minimum width of the containing block.
|
|
if (hasBreak)
|
|
m_hasBreakableChar = true;
|
|
m_beginMinWidth = hasBreak ? 0 : currMinWidth;
|
|
}
|
|
m_endMinWidth = currMinWidth;
|
|
|
|
m_minWidth = std::max(currMinWidth, m_minWidth);
|
|
|
|
i += wordLen - 1;
|
|
} else {
|
|
// Nowrap can never be broken, so don't bother setting the
|
|
// breakable character boolean. Pre can only be broken if we encounter a newline.
|
|
if (style.autoWrap() || isNewline)
|
|
m_hasBreakableChar = true;
|
|
|
|
if (isNewline) { // Only set if preserveNewline was true and we saw a newline.
|
|
if (firstLine) {
|
|
firstLine = false;
|
|
leadWidth = 0;
|
|
if (!style.autoWrap())
|
|
m_beginMinWidth = currMaxWidth;
|
|
}
|
|
|
|
if (currMaxWidth > m_maxWidth)
|
|
m_maxWidth = currMaxWidth;
|
|
currMaxWidth = 0;
|
|
} else {
|
|
TextRun run = RenderBlock::constructTextRun(*this, i, 1, style);
|
|
run.setTabSize(!style.collapseWhiteSpace(), style.tabSize());
|
|
run.setXPos(leadWidth + currMaxWidth);
|
|
|
|
currMaxWidth += font.width(run, &fallbackFonts);
|
|
glyphOverflow.right = 0;
|
|
needsWordSpacing = isSpace && !previousCharacterIsSpace && i == length - 1;
|
|
}
|
|
ASSERT(lastWordBoundary == i);
|
|
lastWordBoundary++;
|
|
}
|
|
}
|
|
|
|
glyphOverflow.left = firstGlyphLeftOverflow.value_or(glyphOverflow.left);
|
|
|
|
if ((needsWordSpacing && length > 1) || (ignoringSpaces && !firstWord))
|
|
currMaxWidth += wordSpacing;
|
|
|
|
m_maxWidth = std::max(currMaxWidth, m_maxWidth);
|
|
|
|
if (!style.autoWrap())
|
|
m_minWidth = m_maxWidth;
|
|
|
|
if (style.whiteSpace() == WhiteSpace::Pre) {
|
|
if (firstLine)
|
|
m_beginMinWidth = m_maxWidth;
|
|
m_endMinWidth = currMaxWidth;
|
|
}
|
|
|
|
setPreferredLogicalWidthsDirty(false);
|
|
}
|
|
|
|
template<typename CharacterType> static inline bool isAllCollapsibleWhitespace(const CharacterType* characters, unsigned length, const RenderStyle& style)
|
|
{
|
|
for (unsigned i = 0; i < length; ++i) {
|
|
if (!style.isCollapsibleWhiteSpace(characters[i]))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool RenderText::isAllCollapsibleWhitespace() const
|
|
{
|
|
if (text().is8Bit())
|
|
return WebCore::isAllCollapsibleWhitespace(text().characters8(), text().length(), style());
|
|
return WebCore::isAllCollapsibleWhitespace(text().characters16(), text().length(), style());
|
|
}
|
|
|
|
template<typename CharacterType> static inline bool isAllPossiblyCollapsibleWhitespace(const CharacterType* characters, unsigned length)
|
|
{
|
|
for (unsigned i = 0; i < length; ++i) {
|
|
if (!(characters[i] == '\n' || characters[i] == ' ' || characters[i] == '\t'))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool RenderText::containsOnlyHTMLWhitespace(unsigned from, unsigned length) const
|
|
{
|
|
ASSERT(from <= text().length());
|
|
ASSERT(length <= text().length());
|
|
ASSERT(from + length <= text().length());
|
|
if (text().is8Bit())
|
|
return isAllPossiblyCollapsibleWhitespace(text().characters8() + from, length);
|
|
return isAllPossiblyCollapsibleWhitespace(text().characters16() + from, length);
|
|
}
|
|
|
|
Vector<std::pair<unsigned, unsigned>> RenderText::draggedContentRangesBetweenOffsets(unsigned startOffset, unsigned endOffset) const
|
|
{
|
|
if (!textNode())
|
|
return { };
|
|
|
|
auto markers = document().markers().markersFor(*textNode(), DocumentMarker::DraggedContent);
|
|
if (markers.isEmpty())
|
|
return { };
|
|
|
|
Vector<std::pair<unsigned, unsigned>> draggedContentRanges;
|
|
for (auto* marker : markers) {
|
|
unsigned markerStart = std::max(marker->startOffset(), startOffset);
|
|
unsigned markerEnd = std::min(marker->endOffset(), endOffset);
|
|
if (markerStart >= markerEnd || markerStart > endOffset || markerEnd < startOffset)
|
|
continue;
|
|
|
|
std::pair<unsigned, unsigned> draggedContentRange;
|
|
draggedContentRange.first = markerStart;
|
|
draggedContentRange.second = markerEnd;
|
|
draggedContentRanges.append(draggedContentRange);
|
|
}
|
|
return draggedContentRanges;
|
|
}
|
|
|
|
IntPoint RenderText::firstRunLocation() const
|
|
{
|
|
auto first = LayoutIntegration::firstTextRunFor(*this);
|
|
if (!first)
|
|
return { };
|
|
return IntPoint(first->rect().location());
|
|
}
|
|
|
|
void RenderText::setSelectionState(HighlightState state)
|
|
{
|
|
RenderObject::setSelectionState(state);
|
|
|
|
// The containing block can be null in case of an orphaned tree.
|
|
RenderBlock* containingBlock = this->containingBlock();
|
|
if (containingBlock && !containingBlock->isRenderView())
|
|
containingBlock->setSelectionState(state);
|
|
}
|
|
|
|
void RenderText::setTextWithOffset(const String& newText, unsigned offset, unsigned length, bool force)
|
|
{
|
|
if (!force && text() == newText)
|
|
return;
|
|
|
|
int delta = newText.length() - text().length();
|
|
unsigned end = offset + length;
|
|
|
|
m_linesDirty = m_lineBoxes.dirtyRange(*this, offset, end, delta);
|
|
|
|
setText(newText, force || m_linesDirty);
|
|
}
|
|
|
|
static inline bool isInlineFlowOrEmptyText(const RenderObject& renderer)
|
|
{
|
|
return is<RenderInline>(renderer) || (is<RenderText>(renderer) && downcast<RenderText>(renderer).text().isEmpty());
|
|
}
|
|
|
|
UChar RenderText::previousCharacter() const
|
|
{
|
|
// find previous text renderer if one exists
|
|
const RenderObject* previousText = this;
|
|
while ((previousText = previousText->previousInPreOrder())) {
|
|
if (!isInlineFlowOrEmptyText(*previousText))
|
|
break;
|
|
}
|
|
if (!is<RenderText>(previousText))
|
|
return ' ';
|
|
auto& previousString = downcast<RenderText>(*previousText).text();
|
|
return previousString[previousString.length() - 1];
|
|
}
|
|
|
|
String applyTextTransform(const RenderStyle& style, const String& text, UChar previousCharacter)
|
|
{
|
|
switch (style.textTransform()) {
|
|
case TextTransform::None:
|
|
return text;
|
|
case TextTransform::Capitalize:
|
|
return capitalize(text, previousCharacter); // FIXME: Need to take locale into account.
|
|
case TextTransform::Uppercase:
|
|
return text.convertToUppercaseWithLocale(style.computedLocale());
|
|
case TextTransform::Lowercase:
|
|
return text.convertToLowercaseWithLocale(style.computedLocale());
|
|
}
|
|
ASSERT_NOT_REACHED();
|
|
return text;
|
|
}
|
|
|
|
void RenderText::setRenderedText(const String& newText)
|
|
{
|
|
ASSERT(!newText.isNull());
|
|
|
|
String originalText = this->originalText();
|
|
|
|
m_text = newText;
|
|
|
|
if (m_useBackslashAsYenSymbol)
|
|
m_text.replace('\\', yenSign);
|
|
|
|
const auto& style = this->style();
|
|
if (style.textTransform() != TextTransform::None)
|
|
m_text = applyTextTransform(style, m_text, previousCharacter());
|
|
|
|
// At rendering time, if certain fonts are used, these characters get swapped out with higher-quality PUA characters.
|
|
// See RenderBlock::updateSecurityDiscCharacters().
|
|
switch (style.textSecurity()) {
|
|
case TextSecurity::None:
|
|
break;
|
|
#if !PLATFORM(IOS_FAMILY)
|
|
// We use the same characters here as for list markers.
|
|
// See the listMarkerText function in RenderListMarker.cpp.
|
|
case TextSecurity::Circle:
|
|
secureText(whiteBullet);
|
|
break;
|
|
case TextSecurity::Disc:
|
|
secureText(bullet);
|
|
break;
|
|
case TextSecurity::Square:
|
|
secureText(blackSquare);
|
|
break;
|
|
#else
|
|
// FIXME: Why this quirk on iOS?
|
|
case TextSecurity::Circle:
|
|
case TextSecurity::Disc:
|
|
case TextSecurity::Square:
|
|
secureText(blackCircle);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
m_isAllASCII = text().isAllASCII();
|
|
m_canUseSimpleFontCodePath = computeCanUseSimpleFontCodePath();
|
|
m_canUseSimplifiedTextMeasuring = computeCanUseSimplifiedTextMeasuring();
|
|
|
|
if (m_text != originalText) {
|
|
originalTextMap().set(this, originalText);
|
|
m_originalTextDiffersFromRendered = true;
|
|
} else if (m_originalTextDiffersFromRendered) {
|
|
originalTextMap().remove(this);
|
|
m_originalTextDiffersFromRendered = false;
|
|
}
|
|
}
|
|
|
|
void RenderText::secureText(UChar maskingCharacter)
|
|
{
|
|
// This hides the text by replacing all the characters with the masking character.
|
|
// Offsets within the hidden text have to match offsets within the original text
|
|
// to handle things like carets and selection, so this won't work right if any
|
|
// of the characters are surrogate pairs or combining marks. Thus, this function
|
|
// does not attempt to handle either of those.
|
|
|
|
unsigned length = text().length();
|
|
if (!length)
|
|
return;
|
|
|
|
UChar characterToReveal = 0;
|
|
unsigned revealedCharactersOffset = 0;
|
|
|
|
if (SecureTextTimer* timer = secureTextTimers().get(this)) {
|
|
// We take the offset out of the timer to make this one-shot. We count on this being called only once.
|
|
// If it's called a second time we assume the text is different and a character should not be revealed.
|
|
revealedCharactersOffset = timer->takeOffsetAfterLastTypedCharacter();
|
|
if (revealedCharactersOffset && revealedCharactersOffset <= length)
|
|
characterToReveal = text()[--revealedCharactersOffset];
|
|
}
|
|
|
|
UChar* characters;
|
|
m_text = String::createUninitialized(length, characters);
|
|
|
|
for (unsigned i = 0; i < length; ++i)
|
|
characters[i] = maskingCharacter;
|
|
if (characterToReveal)
|
|
characters[revealedCharactersOffset] = characterToReveal;
|
|
}
|
|
|
|
bool RenderText::computeCanUseSimplifiedTextMeasuring() const
|
|
{
|
|
if (!m_canUseSimpleFontCodePath)
|
|
return false;
|
|
|
|
auto& font = style().fontCascade();
|
|
if (font.wordSpacing() || font.letterSpacing())
|
|
return false;
|
|
|
|
// Additional check on the font codepath.
|
|
TextRun run(m_text);
|
|
run.setCharacterScanForCodePath(false);
|
|
if (font.codePath(run) != FontCascade::CodePath::Simple)
|
|
return false;
|
|
|
|
auto whitespaceIsCollapsed = style().collapseWhiteSpace();
|
|
for (unsigned i = 0; i < text().length(); ++i) {
|
|
if (!WidthIterator::characterCanUseSimplifiedTextMeasuring(text()[i], whitespaceIsCollapsed))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void RenderText::setText(const String& text, bool force)
|
|
{
|
|
ASSERT(!text.isNull());
|
|
|
|
if (!force && text == originalText())
|
|
return;
|
|
|
|
m_text = text;
|
|
if (m_originalTextDiffersFromRendered) {
|
|
originalTextMap().remove(this);
|
|
m_originalTextDiffersFromRendered = false;
|
|
}
|
|
|
|
setRenderedText(text);
|
|
|
|
setNeedsLayoutAndPrefWidthsRecalc();
|
|
m_knownToHaveNoOverflowAndNoFallbackFonts = false;
|
|
|
|
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
|
|
if (auto* container = LayoutIntegration::LineLayout::blockContainer(*this))
|
|
container->invalidateLineLayoutPath();
|
|
#endif
|
|
|
|
if (AXObjectCache* cache = document().existingAXObjectCache())
|
|
cache->deferTextChangedIfNeeded(textNode());
|
|
}
|
|
|
|
String RenderText::textWithoutConvertingBackslashToYenSymbol() const
|
|
{
|
|
if (!m_useBackslashAsYenSymbol || style().textSecurity() != TextSecurity::None)
|
|
return text();
|
|
|
|
if (style().textTransform() == TextTransform::None)
|
|
return originalText();
|
|
|
|
return applyTextTransform(style(), originalText(), previousCharacter());
|
|
}
|
|
|
|
void RenderText::dirtyLineBoxes(bool fullLayout)
|
|
{
|
|
if (fullLayout)
|
|
deleteLineBoxes();
|
|
else if (!m_linesDirty)
|
|
m_lineBoxes.dirtyAll();
|
|
m_linesDirty = false;
|
|
}
|
|
|
|
void RenderText::deleteLineBoxes()
|
|
{
|
|
m_lineBoxes.deleteAll();
|
|
}
|
|
|
|
std::unique_ptr<LegacyInlineTextBox> RenderText::createTextBox()
|
|
{
|
|
return makeUnique<LegacyInlineTextBox>(*this);
|
|
}
|
|
|
|
void RenderText::positionLineBox(LegacyInlineTextBox& textBox)
|
|
{
|
|
if (!textBox.hasTextContent())
|
|
return;
|
|
m_containsReversedText |= !textBox.isLeftToRightDirection();
|
|
}
|
|
|
|
bool RenderText::usesLegacyLineLayoutPath() const
|
|
{
|
|
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
|
|
return !LayoutIntegration::LineLayout::containing(*this);
|
|
#else
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
float RenderText::width(unsigned from, unsigned len, float xPos, bool firstLine, HashSet<const Font*>* fallbackFonts, GlyphOverflow* glyphOverflow) const
|
|
{
|
|
if (from >= text().length())
|
|
return 0;
|
|
|
|
if (from + len > text().length())
|
|
len = text().length() - from;
|
|
|
|
const RenderStyle& lineStyle = firstLine ? firstLineStyle() : style();
|
|
return width(from, len, lineStyle.fontCascade(), xPos, fallbackFonts, glyphOverflow);
|
|
}
|
|
|
|
float RenderText::width(unsigned from, unsigned len, const FontCascade& f, float xPos, HashSet<const Font*>* fallbackFonts, GlyphOverflow* glyphOverflow) const
|
|
{
|
|
ASSERT(from + len <= text().length());
|
|
if (!text().length())
|
|
return 0;
|
|
|
|
const RenderStyle& style = this->style();
|
|
float w;
|
|
if (&f == &style.fontCascade()) {
|
|
if (!style.preserveNewline() && !from && len == text().length() && (!glyphOverflow || !glyphOverflow->computeBounds)) {
|
|
if (fallbackFonts) {
|
|
ASSERT(glyphOverflow);
|
|
if (preferredLogicalWidthsDirty() || !m_knownToHaveNoOverflowAndNoFallbackFonts) {
|
|
const_cast<RenderText*>(this)->computePreferredLogicalWidths(0, *fallbackFonts, *glyphOverflow);
|
|
if (fallbackFonts->isEmpty() && !glyphOverflow->left && !glyphOverflow->right && !glyphOverflow->top && !glyphOverflow->bottom)
|
|
m_knownToHaveNoOverflowAndNoFallbackFonts = true;
|
|
}
|
|
w = m_maxWidth;
|
|
} else
|
|
w = maxLogicalWidth();
|
|
} else
|
|
w = widthFromCache(f, from, len, xPos, fallbackFonts, glyphOverflow, style);
|
|
} else {
|
|
TextRun run = RenderBlock::constructTextRun(*this, from, len, style);
|
|
run.setCharacterScanForCodePath(!canUseSimpleFontCodePath());
|
|
run.setTabSize(!style.collapseWhiteSpace(), style.tabSize());
|
|
run.setXPos(xPos);
|
|
|
|
w = f.width(run, fallbackFonts, glyphOverflow);
|
|
}
|
|
|
|
return clampTo(w, 0.f);
|
|
}
|
|
|
|
IntRect RenderText::linesBoundingBox() const
|
|
{
|
|
auto first = LayoutIntegration::firstTextRunFor(*this);
|
|
if (!first)
|
|
return { };
|
|
|
|
auto boundingBox = first->rect();
|
|
for (auto box = first; ++box;)
|
|
boundingBox.uniteEvenIfEmpty(box->rect());
|
|
|
|
return enclosingIntRect(boundingBox);
|
|
}
|
|
|
|
LayoutRect RenderText::linesVisualOverflowBoundingBox() const
|
|
{
|
|
return m_lineBoxes.visualOverflowBoundingBox(*this);
|
|
}
|
|
|
|
LayoutRect RenderText::clippedOverflowRect(const RenderLayerModelObject* repaintContainer, VisibleRectContext context) const
|
|
{
|
|
RenderObject* rendererToRepaint = containingBlock();
|
|
|
|
// Do not cross self-painting layer boundaries.
|
|
RenderObject& enclosingLayerRenderer = enclosingLayer()->renderer();
|
|
if (&enclosingLayerRenderer != rendererToRepaint && !rendererToRepaint->isDescendantOf(&enclosingLayerRenderer))
|
|
rendererToRepaint = &enclosingLayerRenderer;
|
|
|
|
// The renderer we chose to repaint may be an ancestor of repaintContainer, but we need to do a repaintContainer-relative repaint.
|
|
if (repaintContainer && repaintContainer != rendererToRepaint && !rendererToRepaint->isDescendantOf(repaintContainer))
|
|
return repaintContainer->clippedOverflowRect(repaintContainer, context);
|
|
|
|
return rendererToRepaint->clippedOverflowRect(repaintContainer, context);
|
|
}
|
|
|
|
LayoutRect RenderText::collectSelectionGeometriesForLineBoxes(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent, Vector<FloatQuad>* quads)
|
|
{
|
|
ASSERT(!needsLayout());
|
|
|
|
if (selectionState() == HighlightState::None)
|
|
return LayoutRect();
|
|
if (!containingBlock())
|
|
return LayoutRect();
|
|
|
|
// Now calculate startPos and endPos for painting selection.
|
|
// We include a selection while endPos > 0
|
|
unsigned startOffset;
|
|
unsigned endOffset;
|
|
if (selectionState() == HighlightState::Inside) {
|
|
// We are fully selected.
|
|
startOffset = 0;
|
|
endOffset = text().length();
|
|
} else {
|
|
startOffset = view().selection().startOffset();
|
|
endOffset = view().selection().endOffset();
|
|
if (selectionState() == HighlightState::Start)
|
|
endOffset = text().length();
|
|
else if (selectionState() == HighlightState::End)
|
|
startOffset = 0;
|
|
}
|
|
|
|
if (startOffset == endOffset)
|
|
return IntRect();
|
|
|
|
LayoutRect resultRect;
|
|
|
|
for (auto& run : LayoutIntegration::textRunsFor(*this)) {
|
|
LayoutRect rect;
|
|
rect.unite(run.selectionRect(startOffset, endOffset));
|
|
rect.unite(ellipsisRectForTextRun(run, startOffset, endOffset));
|
|
if (rect.isEmpty())
|
|
continue;
|
|
|
|
resultRect.unite(rect);
|
|
|
|
if (quads)
|
|
quads->append(localToContainerQuad(FloatRect(rect), repaintContainer));
|
|
}
|
|
|
|
if (clipToVisibleContent)
|
|
return computeRectForRepaint(resultRect, repaintContainer);
|
|
return localToContainerQuad(FloatRect(resultRect), repaintContainer).enclosingBoundingBox();
|
|
}
|
|
|
|
LayoutRect RenderText::collectSelectionGeometriesForLineBoxes(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent, Vector<FloatQuad>& quads)
|
|
{
|
|
return collectSelectionGeometriesForLineBoxes(repaintContainer, clipToVisibleContent, &quads);
|
|
}
|
|
|
|
LayoutRect RenderText::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent)
|
|
{
|
|
return collectSelectionGeometriesForLineBoxes(repaintContainer, clipToVisibleContent, nullptr);
|
|
}
|
|
|
|
int RenderText::caretMinOffset() const
|
|
{
|
|
auto first = LayoutIntegration::firstTextRunFor(*this);
|
|
if (!first)
|
|
return 0;
|
|
|
|
int minOffset = first->start();
|
|
for (auto box = first; ++box;)
|
|
minOffset = std::min<int>(minOffset, box->start());
|
|
|
|
return minOffset;
|
|
}
|
|
|
|
int RenderText::caretMaxOffset() const
|
|
{
|
|
auto first = LayoutIntegration::firstTextRunFor(*this);
|
|
if (!first)
|
|
return text().length();
|
|
|
|
int maxOffset = first->end();
|
|
for (auto box = first; ++box;)
|
|
maxOffset = std::max<int>(maxOffset, box->end());
|
|
|
|
return maxOffset;
|
|
}
|
|
|
|
unsigned RenderText::countRenderedCharacterOffsetsUntil(unsigned offset) const
|
|
{
|
|
unsigned result = 0;
|
|
for (auto& run : LayoutIntegration::textRunsFor(*this)) {
|
|
auto start = run.start();
|
|
auto length = run.length();
|
|
if (offset < start)
|
|
return result;
|
|
if (offset <= start + length) {
|
|
result += offset - start;
|
|
return result;
|
|
}
|
|
result += length;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
enum class OffsetType { Character, Caret };
|
|
static bool containsOffset(const RenderText& text, unsigned offset, OffsetType type)
|
|
{
|
|
for (auto box = LayoutIntegration::firstTextRunInTextOrderFor(text); box; box.traverseNextTextRunInTextOrder()) {
|
|
auto start = box->start();
|
|
if (offset < start)
|
|
return false;
|
|
unsigned end = box->end();
|
|
if (offset >= start && offset <= end) {
|
|
if (offset == end && (type == OffsetType::Character || box->isLineBreak()))
|
|
continue;
|
|
if (type == OffsetType::Character)
|
|
return true;
|
|
// Return false for offsets inside composed characters.
|
|
return !offset || offset == static_cast<unsigned>(text.nextOffset(text.previousOffset(offset)));
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RenderText::containsRenderedCharacterOffset(unsigned offset) const
|
|
{
|
|
return containsOffset(*this, offset, OffsetType::Character);
|
|
}
|
|
|
|
bool RenderText::containsCaretOffset(unsigned offset) const
|
|
{
|
|
return containsOffset(*this, offset, OffsetType::Caret);
|
|
}
|
|
|
|
bool RenderText::hasRenderedText() const
|
|
{
|
|
for (auto& box : LayoutIntegration::textRunsFor(*this)) {
|
|
if (box.length())
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int RenderText::previousOffset(int current) const
|
|
{
|
|
if (m_isAllASCII || text().is8Bit())
|
|
return current - 1;
|
|
|
|
CachedTextBreakIterator iterator(text(), TextBreakIterator::Mode::Caret, nullAtom());
|
|
return iterator.preceding(current).value_or(current - 1);
|
|
}
|
|
|
|
int RenderText::previousOffsetForBackwardDeletion(int current) const
|
|
{
|
|
CachedTextBreakIterator iterator(text(), TextBreakIterator::Mode::Delete, nullAtom());
|
|
return iterator.preceding(current).value_or(0);
|
|
}
|
|
|
|
int RenderText::nextOffset(int current) const
|
|
{
|
|
if (m_isAllASCII || text().is8Bit())
|
|
return current + 1;
|
|
|
|
CachedTextBreakIterator iterator(text(), TextBreakIterator::Mode::Caret, nullAtom());
|
|
return iterator.following(current).value_or(current + 1);
|
|
}
|
|
|
|
bool RenderText::computeCanUseSimpleFontCodePath() const
|
|
{
|
|
if (m_isAllASCII || text().is8Bit())
|
|
return true;
|
|
return FontCascade::characterRangeCodePath(text().characters16(), length()) == FontCascade::CodePath::Simple;
|
|
}
|
|
|
|
void RenderText::momentarilyRevealLastTypedCharacter(unsigned offsetAfterLastTypedCharacter)
|
|
{
|
|
if (style().textSecurity() == TextSecurity::None)
|
|
return;
|
|
auto& secureTextTimer = secureTextTimers().add(this, nullptr).iterator->value;
|
|
if (!secureTextTimer)
|
|
secureTextTimer = makeUnique<SecureTextTimer>(*this);
|
|
secureTextTimer->restart(offsetAfterLastTypedCharacter);
|
|
}
|
|
|
|
StringView RenderText::stringView(unsigned start, std::optional<unsigned> stop) const
|
|
{
|
|
unsigned destination = stop.value_or(text().length());
|
|
ASSERT(start <= length());
|
|
ASSERT(destination <= length());
|
|
ASSERT(start <= destination);
|
|
if (text().is8Bit())
|
|
return { text().characters8() + start, destination - start };
|
|
return { text().characters16() + start, destination - start };
|
|
}
|
|
|
|
RenderInline* RenderText::inlineWrapperForDisplayContents()
|
|
{
|
|
ASSERT(m_hasInlineWrapperForDisplayContents == inlineWrapperForDisplayContentsMap().contains(this));
|
|
|
|
if (!m_hasInlineWrapperForDisplayContents)
|
|
return nullptr;
|
|
return inlineWrapperForDisplayContentsMap().get(this).get();
|
|
}
|
|
|
|
void RenderText::setInlineWrapperForDisplayContents(RenderInline* wrapper)
|
|
{
|
|
ASSERT(m_hasInlineWrapperForDisplayContents == inlineWrapperForDisplayContentsMap().contains(this));
|
|
|
|
if (!wrapper) {
|
|
if (!m_hasInlineWrapperForDisplayContents)
|
|
return;
|
|
inlineWrapperForDisplayContentsMap().remove(this);
|
|
m_hasInlineWrapperForDisplayContents = false;
|
|
return;
|
|
}
|
|
inlineWrapperForDisplayContentsMap().add(this, makeWeakPtr(wrapper));
|
|
m_hasInlineWrapperForDisplayContents = true;
|
|
}
|
|
|
|
RenderText* RenderText::findByDisplayContentsInlineWrapperCandidate(RenderElement& renderer)
|
|
{
|
|
auto* firstChild = renderer.firstChild();
|
|
if (!is<RenderText>(firstChild))
|
|
return nullptr;
|
|
auto& textRenderer = downcast<RenderText>(*firstChild);
|
|
if (textRenderer.inlineWrapperForDisplayContents() != &renderer)
|
|
return nullptr;
|
|
ASSERT(textRenderer.textNode());
|
|
ASSERT(renderer.firstChild() == renderer.lastChild());
|
|
return &textRenderer;
|
|
|
|
}
|
|
|
|
} // namespace WebCore
|