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137f6d44ec
Fixed position elements have the ICB as their containing block. The magic of fixed positioning is implemented at the rendering stage, where we temporarily translate painting by the current scroll offset. Note that "absolutely positioned" includes both position:absolute and position:fixed.
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibGfx/Palette.h>
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#include <LibGfx/Rect.h>
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#include <LibGUI/Forward.h>
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namespace Web {
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class RenderingContext {
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public:
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explicit RenderingContext(GUI::Painter& painter, const Palette& palette, const Gfx::IntPoint& scroll_offset)
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: m_painter(painter)
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, m_palette(palette)
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, m_scroll_offset(scroll_offset)
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{
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}
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GUI::Painter& painter() const { return m_painter; }
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const Palette& palette() const { return m_palette; }
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bool should_show_line_box_borders() const { return m_should_show_line_box_borders; }
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void set_should_show_line_box_borders(bool value) { m_should_show_line_box_borders = value; }
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Gfx::IntRect viewport_rect() const { return m_viewport_rect; }
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void set_viewport_rect(const Gfx::IntRect& rect) { m_viewport_rect = rect; }
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const Gfx::IntPoint& scroll_offset() const { return m_scroll_offset; }
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private:
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GUI::Painter& m_painter;
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Palette m_palette;
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Gfx::IntRect m_viewport_rect;
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Gfx::IntPoint m_scroll_offset;
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bool m_should_show_line_box_borders { false };
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};
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}
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