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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibGUI/Painter.h>
#include <LibGfx/Font.h>
#include <LibGfx/ImageDecoder.h>
#include <LibGfx/StylePainter.h>
#include <LibWeb/Layout/LayoutImage.h>
namespace Web {
LayoutImage::LayoutImage(const Element& element, NonnullRefPtr<StyleProperties> style, const ImageLoader& image_loader)
: LayoutReplaced(element, move(style))
, m_image_loader(image_loader)
{
}
LayoutImage::~LayoutImage()
{
}
int LayoutImage::preferred_width() const
{
auto* decoder = m_image_loader.image_decoder();
return node().attribute(HTML::AttributeNames::width).to_int().value_or(decoder ? decoder->width() : 0);
}
int LayoutImage::preferred_height() const
{
auto* decoder = m_image_loader.image_decoder();
return node().attribute(HTML::AttributeNames::height).to_int().value_or(decoder ? decoder->height() : 0);
}
void LayoutImage::layout(LayoutMode layout_mode)
{
if (preferred_width() && preferred_height()) {
set_has_intrinsic_width(true);
set_has_intrinsic_height(true);
set_intrinsic_width(preferred_width());
set_intrinsic_height(preferred_height());
} else if (renders_as_alt_text()) {
auto& image_element = to<HTMLImageElement>(node());
auto& font = Gfx::Font::default_font();
auto alt = image_element.alt();
if (alt.is_empty())
alt = image_element.src();
set_width(font.width(alt) + 16);
set_height(font.glyph_height() + 16);
} else {
set_width(16);
set_height(16);
}
LayoutReplaced::layout(layout_mode);
}
void LayoutImage::render(RenderingContext& context)
{
if (!is_visible())
return;
// FIXME: This should be done at a different level. Also rect() does not include padding etc!
if (!context.viewport_rect().intersects(enclosing_int_rect(absolute_rect())))
return;
LayoutReplaced::render(context);
if (renders_as_alt_text()) {
auto& image_element = to<HTMLImageElement>(node());
context.painter().set_font(Gfx::Font::default_font());
Gfx::StylePainter::paint_frame(context.painter(), enclosing_int_rect(absolute_rect()), context.palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
auto alt = image_element.alt();
if (alt.is_empty())
alt = image_element.src();
context.painter().draw_text(enclosing_int_rect(absolute_rect()), alt, Gfx::TextAlignment::Center, style().color_or_fallback(CSS::PropertyID::Color, document(), Color::Black), Gfx::TextElision::Right);
} else if (m_image_loader.bitmap()) {
context.painter().draw_scaled_bitmap(enclosing_int_rect(absolute_rect()), *m_image_loader.bitmap(), m_image_loader.bitmap()->rect());
}
}
bool LayoutImage::renders_as_alt_text() const
{
if (is<HTMLImageElement>(node()))
return !m_image_loader.image_decoder();
return false;
}
void LayoutImage::set_visible_in_viewport(Badge<LayoutDocument>, bool visible_in_viewport)
{
m_image_loader.set_visible_in_viewport(visible_in_viewport);
}
}
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