| /* |
| * Copyright (C) 2019-2021 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. |
| */ |
| |
| #include "config.h" |
| #include "InlineIteratorTextBox.h" |
| |
| #include "InlineIteratorLine.h" |
| #include "LayoutIntegrationLineLayout.h" |
| #include "RenderCombineText.h" |
| |
| namespace WebCore { |
| namespace InlineIterator { |
| |
| TextBoxIterator TextBox::nextTextBox() const |
| { |
| return TextBoxIterator(*this).traverseNextTextBox(); |
| } |
| |
| LayoutRect TextBox::selectionRect(unsigned rangeStart, unsigned rangeEnd) const |
| { |
| auto [clampedStart, clampedEnd] = selectableRange().clamp(rangeStart, rangeEnd); |
| |
| if (clampedStart >= clampedEnd && !(rangeStart == rangeEnd && rangeStart >= start() && rangeStart <= end())) |
| return { }; |
| |
| auto selectionTop = line()->selectionTop(); |
| auto selectionHeight = line()->selectionHeight(); |
| |
| LayoutRect selectionRect { logicalLeft(), selectionTop, logicalWidth(), selectionHeight }; |
| |
| TextRun textRun = createTextRun(); |
| if (clampedStart || clampedEnd != textRun.length()) |
| fontCascade().adjustSelectionRectForText(textRun, selectionRect, clampedStart, clampedEnd); |
| |
| return snappedSelectionRect(selectionRect, logicalRight(), selectionTop, selectionHeight, isHorizontal()); |
| } |
| |
| unsigned TextBox::offsetForPosition(float x, bool includePartialGlyphs) const |
| { |
| if (isLineBreak()) |
| return 0; |
| if (x - logicalLeft() > logicalWidth()) |
| return isLeftToRightDirection() ? length() : 0; |
| if (x - logicalLeft() < 0) |
| return isLeftToRightDirection() ? 0 : length(); |
| return fontCascade().offsetForPosition(createTextRun(CreateTextRunMode::Editing), x - logicalLeft(), includePartialGlyphs); |
| } |
| |
| float TextBox::positionForOffset(unsigned offset) const |
| { |
| ASSERT(offset >= start()); |
| ASSERT(offset <= end()); |
| |
| if (isLineBreak()) |
| return logicalLeft(); |
| |
| auto [startOffset, endOffset] = [&] { |
| if (direction() == TextDirection::RTL) |
| return std::pair { selectableRange().clamp(offset), length() }; |
| return std::pair { 0u, selectableRange().clamp(offset) }; |
| }(); |
| |
| auto selectionRect = LayoutRect(logicalLeft(), 0, 0, 0); |
| |
| auto textRun = createTextRun(CreateTextRunMode::Editing); |
| fontCascade().adjustSelectionRectForText(textRun, selectionRect, startOffset, endOffset); |
| return snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), textRun.ltr()).maxX(); |
| } |
| |
| bool TextBox::isCombinedText() const |
| { |
| auto& renderer = this->renderer(); |
| return is<RenderCombineText>(renderer) && downcast<RenderCombineText>(renderer).isCombined(); |
| } |
| |
| const FontCascade& TextBox::fontCascade() const |
| { |
| if (isCombinedText()) |
| return downcast<RenderCombineText>(renderer()).textCombineFont(); |
| |
| return style().fontCascade(); |
| } |
| |
| TextBoxIterator::TextBoxIterator(Box::PathVariant&& pathVariant) |
| : LeafBoxIterator(WTFMove(pathVariant)) |
| { |
| } |
| |
| TextBoxIterator::TextBoxIterator(const Box& box) |
| : LeafBoxIterator(box) |
| { |
| } |
| |
| TextBoxIterator& TextBoxIterator::traverseNextTextBox() |
| { |
| WTF::switchOn(m_box.m_pathVariant, [](auto& path) { |
| path.traverseNextTextBox(); |
| }); |
| return *this; |
| } |
| |
| TextBoxIterator firstTextBoxFor(const RenderText& text) |
| { |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| if (auto* lineLayout = LayoutIntegration::LineLayout::containing(text)) |
| return lineLayout->textBoxesFor(text); |
| #endif |
| |
| return { BoxLegacyPath { text.firstTextBox() } }; |
| } |
| |
| TextBoxIterator textBoxFor(const LegacyInlineTextBox* legacyInlineTextBox) |
| { |
| return { BoxLegacyPath { legacyInlineTextBox } }; |
| } |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| TextBoxIterator textBoxFor(const LayoutIntegration::InlineContent& content, const InlineDisplay::Box& box) |
| { |
| return textBoxFor(content, content.indexForBox(box)); |
| } |
| |
| TextBoxIterator textBoxFor(const LayoutIntegration::InlineContent& content, size_t boxIndex) |
| { |
| ASSERT(content.boxes[boxIndex].text()); |
| return { BoxModernPath { content, boxIndex } }; |
| } |
| #endif |
| |
| TextBoxRange textBoxesFor(const RenderText& text) |
| { |
| return { firstTextBoxFor(text) }; |
| } |
| |
| } |
| } |