| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * |
| * 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 THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_BR_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_BR_H_ |
| |
| #include "third_party/blink/renderer/core/layout/layout_text.h" |
| |
| // The whole class here is a hack to get <br> working, as long as we don't have |
| // support for CSS2 :before and :after pseudo elements. |
| namespace blink { |
| |
| class LayoutBR final : public LayoutText { |
| public: |
| explicit LayoutBR(Node*); |
| ~LayoutBR() override; |
| |
| const char* GetName() const override { return "LayoutBR"; } |
| |
| // Although line breaks contain no actual text, if we're selected we need |
| // to return a rect that includes space to illustrate a newline. |
| using LayoutText::LocalSelectionVisualRect; |
| |
| float Width(unsigned /* from */, |
| unsigned /* len */, |
| const Font&, |
| LayoutUnit /* xpos */, |
| TextDirection, |
| HashSet<const SimpleFontData*>* = nullptr /* fallbackFonts */, |
| FloatRect* /* glyphBounds */ = nullptr, |
| float /* expansion */ = false) const override { |
| return 0; |
| } |
| float Width(unsigned /* from */, |
| unsigned /* len */, |
| LayoutUnit /* xpos */, |
| TextDirection, |
| bool = false /* firstLine */, |
| HashSet<const SimpleFontData*>* = nullptr /* fallbackFonts */, |
| FloatRect* /* glyphBounds */ = nullptr, |
| float /* expansion */ = false) const override { |
| return 0; |
| } |
| |
| int LineHeight(bool first_line) const; |
| |
| bool IsOfType(LayoutObjectType type) const override { |
| return type == kLayoutObjectBr || LayoutText::IsOfType(type); |
| } |
| |
| int CaretMinOffset() const override; |
| int CaretMaxOffset() const override; |
| |
| PositionWithAffinity PositionForPoint(const LayoutPoint&) const final; |
| |
| Position PositionForCaretOffset(unsigned) const final; |
| base::Optional<unsigned> CaretOffsetForPosition(const Position&) const final; |
| |
| protected: |
| void StyleDidChange(StyleDifference, const ComputedStyle* old_style) override; |
| }; |
| |
| DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBR, IsBR()); |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_BR_H_ |