1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#pragma once
22
23#include "FontCascade.h"
24#include "RenderText.h"
25#include "Text.h"
26
27namespace WebCore {
28
29class RenderCombineText final : public RenderText {
30 WTF_MAKE_ISO_ALLOCATED(RenderCombineText);
31public:
32 RenderCombineText(Text&, const String&);
33
34 Text& textNode() const { return downcast<Text>(nodeForNonAnonymous()); }
35
36 void combineTextIfNeeded();
37 Optional<FloatPoint> computeTextOrigin(const FloatRect& boxRect) const;
38 String combinedStringForRendering() const;
39 bool isCombined() const { return m_isCombined; }
40 float combinedTextWidth(const FontCascade& font) const { return font.size(); }
41 const FontCascade& originalFont() const { return parent()->style().fontCascade(); }
42 const FontCascade& textCombineFont() const { return m_combineFontStyle->fontCascade(); }
43
44private:
45 void node() const = delete;
46
47 bool isCombineText() const override { return true; }
48 float width(unsigned from, unsigned length, const FontCascade&, float xPosition, HashSet<const Font*>* fallbackFonts = 0, GlyphOverflow* = 0) const override;
49 const char* renderName() const override { return "RenderCombineText"; }
50 void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
51 void setRenderedText(const String&) override;
52
53 std::unique_ptr<RenderStyle> m_combineFontStyle;
54 float m_combinedTextWidth { 0 };
55 float m_combinedTextAscent { 0 };
56 float m_combinedTextDescent { 0 };
57 bool m_isCombined : 1;
58 bool m_needsFontUpdate : 1;
59};
60
61} // namespace WebCore
62
63SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderCombineText, isCombineText())
64