| /* |
| * Copyright (C) 2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "FontCascade.h" |
| #include "LayoutIntegrationInlineContent.h" |
| |
| namespace WebCore { |
| |
| namespace LayoutIntegration { |
| |
| class RunIteratorModernPath { |
| public: |
| RunIteratorModernPath(const InlineContent& inlineContent) |
| : m_inlineContent(&inlineContent) |
| { |
| setAtEnd(); |
| } |
| RunIteratorModernPath(const InlineContent& inlineContent, size_t startIndex) |
| : m_inlineContent(&inlineContent) |
| , m_runIndex(startIndex) |
| { |
| } |
| |
| bool isText() const { return !!run().textContent(); } |
| |
| FloatRect rect() const { return run().rect(); } |
| |
| bool isHorizontal() const { return true; } |
| bool dirOverride() const { return false; } |
| bool isLineBreak() const { return run().isLineBreak(); } |
| |
| unsigned minimumCaretOffset() const { return isText() ? start() : 0; } |
| unsigned maximumCaretOffset() const { return isText() ? end() : 1; } |
| |
| unsigned char bidiLevel() const { return 0; } |
| |
| bool hasHyphen() const { return run().textContent()->hasHyphen(); } |
| StringView text() const { return run().textContent()->originalContent(); } |
| unsigned start() const { return run().textContent()->start(); } |
| unsigned end() const { return run().textContent()->end(); } |
| unsigned length() const { return run().textContent()->length(); } |
| |
| // FIXME: Make a shared generic version of this. |
| inline unsigned offsetForPosition(float x) const |
| { |
| if (isLineBreak()) |
| return 0; |
| auto rect = this->rect(); |
| auto localX = x - rect.x(); |
| if (localX > rect.width()) |
| return length(); |
| if (localX < 0) |
| return 0; |
| |
| bool includePartialGlyphs = true; |
| return run().style().fontCascade().offsetForPosition(createTextRun(HyphenMode::Ignore), localX, includePartialGlyphs); |
| } |
| |
| // FIXME: Make a shared generic version of this. |
| float positionForOffset(unsigned offset) const |
| { |
| ASSERT(offset >= start()); |
| ASSERT(offset <= end()); |
| |
| if (isLineBreak()) |
| return rect().x(); |
| |
| auto endOffset = clampedOffset(offset); |
| |
| LayoutRect selectionRect = LayoutRect(rect().x(), 0, 0, 0); |
| TextRun textRun = createTextRun(HyphenMode::Ignore); |
| run().style().fontCascade().adjustSelectionRectForText(textRun, selectionRect, 0, endOffset); |
| return snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), textRun.ltr()).maxX(); |
| } |
| |
| bool isSelectable(unsigned start, unsigned end) const |
| { |
| return clampedOffset(start) < clampedOffset(end); |
| } |
| |
| LayoutRect selectionRect(unsigned rangeStart, unsigned rangeEnd) const |
| { |
| unsigned clampedStart = clampedOffset(rangeStart); |
| unsigned clampedEnd = clampedOffset(rangeEnd); |
| |
| if (clampedStart >= clampedEnd && !(rangeStart == rangeEnd && rangeStart >= start() && rangeStart <= end())) |
| return { }; |
| |
| auto logicalLeft = LayoutUnit(isHorizontal() ? rect().x() : rect().y()); |
| auto logicalRight = LayoutUnit(isHorizontal() ? rect().maxX() : rect().maxY()); |
| auto logicalWidth = logicalRight - logicalLeft; |
| |
| // FIXME: These should share implementation with the line iterator. |
| auto selectionTop = LayoutUnit::fromFloatRound(line().enclosingContentTop()); |
| auto selectionHeight = LayoutUnit::fromFloatRound(line().enclosingContentBottom() - line().enclosingContentTop()); |
| |
| LayoutRect selectionRect { logicalLeft, selectionTop, logicalWidth, selectionHeight }; |
| |
| TextRun textRun = createTextRun(HyphenMode::Include); |
| if (clampedStart || clampedEnd != textRun.length()) |
| run().style().fontCascade().adjustSelectionRectForText(textRun, selectionRect, clampedStart, clampedEnd); |
| |
| return snappedSelectionRect(selectionRect, logicalRight, selectionTop, selectionHeight, isHorizontal()); |
| } |
| |
| const RenderObject& renderer() const |
| { |
| return m_inlineContent->rendererForLayoutBox(run().layoutBox()); |
| } |
| |
| void traverseNextTextRun() |
| { |
| ASSERT(!atEnd()); |
| ASSERT(run().textContent()); |
| |
| auto& layoutBox = run().layoutBox(); |
| |
| ++m_runIndex; |
| |
| if (!atEnd() && &layoutBox != &run().layoutBox()) |
| setAtEnd(); |
| } |
| |
| void traverseNextTextRunInTextOrder() |
| { |
| // FIXME: No RTL in LFC. |
| traverseNextTextRun(); |
| } |
| |
| void traverseNextOnLine() |
| { |
| ASSERT(!atEnd()); |
| |
| auto oldLineIndex = run().lineIndex(); |
| |
| ++m_runIndex; |
| |
| if (!atEnd() && oldLineIndex != run().lineIndex()) |
| setAtEnd(); |
| } |
| |
| void traversePreviousOnLine() |
| { |
| ASSERT(!atEnd()); |
| |
| if (!m_runIndex) { |
| setAtEnd(); |
| return; |
| } |
| |
| auto oldLineIndex = run().lineIndex(); |
| |
| --m_runIndex; |
| |
| if (oldLineIndex != run().lineIndex()) |
| setAtEnd(); |
| } |
| |
| void traverseNextOnLineInLogicalOrder() |
| { |
| traverseNextOnLine(); |
| } |
| |
| void traversePreviousOnLineInLogicalOrder() |
| { |
| traversePreviousOnLine(); |
| } |
| |
| bool operator==(const RunIteratorModernPath& other) const { return m_inlineContent == other.m_inlineContent && m_runIndex == other.m_runIndex; } |
| |
| bool atEnd() const { return m_runIndex == runs().size() || !run().hasUnderlyingLayout(); } |
| void setAtEnd() { m_runIndex = runs().size(); } |
| |
| InlineBox* legacyInlineBox() const |
| { |
| return nullptr; |
| } |
| |
| private: |
| friend class RunIterator; |
| |
| unsigned clampedOffset(unsigned offset) const |
| { |
| auto clampedOffset = std::max(start(), std::min(offset, end())) - start(); |
| // We treat the last codepoint in this run and the hyphen as a single unit. |
| if (hasHyphen() && clampedOffset == length()) |
| clampedOffset += run().style().hyphenString().length(); |
| |
| return clampedOffset; |
| } |
| |
| enum class HyphenMode { Include, Ignore }; |
| TextRun createTextRun(HyphenMode hyphenMode) const |
| { |
| auto& style = run().style(); |
| auto expansion = run().expansion(); |
| auto rect = this->rect(); |
| auto xPos = rect.x() - (line().lineBoxLeft() + line().contentLeftOffset()); |
| |
| auto textForRun = [&] { |
| if (hyphenMode == HyphenMode::Ignore || !hasHyphen()) |
| return text().toStringWithoutCopying(); |
| |
| return makeString(text(), style.hyphenString()); |
| }(); |
| |
| TextRun textRun { textForRun, xPos, expansion.horizontalExpansion, expansion.behavior }; |
| textRun.setTabSize(!style.collapseWhiteSpace(), style.tabSize()); |
| return textRun; |
| }; |
| |
| const InlineContent::Runs& runs() const { return m_inlineContent->runs; } |
| const Run& run() const { return runs()[m_runIndex]; } |
| const Line& line() const { return m_inlineContent->lineForRun(run()); } |
| |
| RefPtr<const InlineContent> m_inlineContent; |
| size_t m_runIndex { 0 }; |
| }; |
| |
| } |
| } |
| |
| #endif |