| /* |
| * Copyright (C) 2011 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef LayoutTextCombine_h |
| #define LayoutTextCombine_h |
| |
| #include "core/layout/LayoutText.h" |
| #include "platform/fonts/Font.h" |
| |
| namespace blink { |
| |
| // LayoutTextCombine uses different coordinate systems for layout and inlineTextBox, |
| // because it is treated as 1em-box character in vertical flow for the layout, |
| // while its inline box is in horizontal flow. |
| class LayoutTextCombine final : public LayoutText { |
| public: |
| LayoutTextCombine(Node*, PassRefPtr<StringImpl>); |
| |
| void updateFont(); |
| bool isCombined() const { return m_isCombined; } |
| float combinedTextWidth(const Font& font) const { return font.getFontDescription().computedSize(); } |
| const Font& originalFont() const { return parent()->style()->font(); } |
| void transformToInlineCoordinates(GraphicsContext&, const LayoutRect& boxRect, bool clip = false) const; |
| LayoutUnit inlineWidthForLayout() const; |
| |
| const char* name() const override { return "LayoutTextCombine"; } |
| |
| private: |
| bool isCombineText() const override { return true; } |
| float width(unsigned from, unsigned length, const Font&, LayoutUnit xPosition, TextDirection, HashSet<const SimpleFontData*>* fallbackFonts = nullptr, FloatRect* glyphBounds = nullptr) const override; |
| void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override; |
| void setTextInternal(PassRefPtr<StringImpl>) override; |
| void updateIsCombined(); |
| |
| float m_combinedTextWidth; |
| float m_scaleX; |
| bool m_isCombined : 1; |
| bool m_needsFontUpdate : 1; |
| }; |
| |
| DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTextCombine, isCombineText()); |
| |
| inline LayoutUnit LayoutTextCombine::inlineWidthForLayout() const |
| { |
| ASSERT(!m_needsFontUpdate); |
| return LayoutUnit::fromFloatCeil(m_combinedTextWidth); |
| } |
| |
| } // namespace blink |
| |
| #endif // LayoutTextCombine_h |