mirror of
https://github.com/RGBCube/serenity
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4d5ecf6e32
LayoutReplaced now has intrinsic width, height and ratio. Only some of the values may be present. The layout algorithm takes the various configurations into account per the CSS specification. This is still pretty immature but at least we're moving forward. :^)
91 lines
3.5 KiB
C++
91 lines
3.5 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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#include <LibGfx/Font.h>
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#include <LibGfx/StylePainter.h>
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#include <LibGUI/Painter.h>
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#include <LibWeb/Layout/LayoutImage.h>
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namespace Web {
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LayoutImage::LayoutImage(const HTMLImageElement& element, NonnullRefPtr<StyleProperties> style)
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: LayoutReplaced(element, move(style))
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{
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}
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LayoutImage::~LayoutImage()
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{
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}
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void LayoutImage::layout(LayoutMode layout_mode)
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{
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if (node().preferred_width() && node().preferred_height()) {
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set_has_intrinsic_width(true);
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set_has_intrinsic_height(true);
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set_intrinsic_width(node().preferred_width());
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set_intrinsic_height(node().preferred_height());
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} else if (renders_as_alt_text()) {
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auto& font = Gfx::Font::default_font();
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auto alt = node().alt();
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if (alt.is_empty())
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alt = node().src();
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rect().set_width(font.width(alt) + 16);
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rect().set_height(font.glyph_height() + 16);
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} else {
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rect().set_width(16);
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rect().set_height(16);
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}
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LayoutReplaced::layout(layout_mode);
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}
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void LayoutImage::render(RenderingContext& context)
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{
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if (!is_visible())
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return;
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// FIXME: This should be done at a different level. Also rect() does not include padding etc!
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if (!context.viewport_rect().intersects(enclosing_int_rect(rect())))
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return;
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if (renders_as_alt_text()) {
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context.painter().set_font(Gfx::Font::default_font());
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Gfx::StylePainter::paint_frame(context.painter(), enclosing_int_rect(rect()), context.palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
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auto alt = node().alt();
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if (alt.is_empty())
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alt = node().src();
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context.painter().draw_text(enclosing_int_rect(rect()), alt, Gfx::TextAlignment::Center, style().color_or_fallback(CSS::PropertyID::Color, document(), Color::Black), Gfx::TextElision::Right);
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} else if (node().bitmap())
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context.painter().draw_scaled_bitmap(enclosing_int_rect(rect()), *node().bitmap(), node().bitmap()->rect());
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LayoutReplaced::render(context);
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}
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bool LayoutImage::renders_as_alt_text() const
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{
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return !node().image_decoder();
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}
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}
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