mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 05:22:45 +00:00
4d401bf796
This simplifies the ownership model between DOM/layout/paint nodes immensely by deferring to the garbage collector for figuring out what's live and what's not.
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibWeb/HTML/BrowsingContext.h>
|
|
#include <LibWeb/Layout/ImageBox.h>
|
|
#include <LibWeb/Painting/ImagePaintable.h>
|
|
#include <LibWeb/Platform/FontPlugin.h>
|
|
|
|
namespace Web::Layout {
|
|
|
|
ImageBox::ImageBox(DOM::Document& document, DOM::Element& element, NonnullRefPtr<CSS::StyleProperties> style, ImageLoader const& image_loader)
|
|
: ReplacedBox(document, element, move(style))
|
|
, m_image_loader(image_loader)
|
|
{
|
|
browsing_context().register_viewport_client(*this);
|
|
}
|
|
|
|
ImageBox::~ImageBox() = default;
|
|
|
|
void ImageBox::finalize()
|
|
{
|
|
Base::finalize();
|
|
|
|
// NOTE: We unregister from the browsing context in finalize() to avoid trouble
|
|
// in the scenario where our BrowsingContext has already been swept by GC.
|
|
browsing_context().unregister_viewport_client(*this);
|
|
}
|
|
|
|
int ImageBox::preferred_width() const
|
|
{
|
|
return dom_node().attribute(HTML::AttributeNames::width).to_int().value_or(m_image_loader.width());
|
|
}
|
|
|
|
int ImageBox::preferred_height() const
|
|
{
|
|
return dom_node().attribute(HTML::AttributeNames::height).to_int().value_or(m_image_loader.height());
|
|
}
|
|
|
|
void ImageBox::prepare_for_replaced_layout()
|
|
{
|
|
if (!m_image_loader.has_loaded_or_failed()) {
|
|
set_intrinsic_width(0);
|
|
set_intrinsic_height(0);
|
|
} else {
|
|
if (m_image_loader.width()) {
|
|
set_intrinsic_width(m_image_loader.width());
|
|
}
|
|
if (m_image_loader.height()) {
|
|
set_intrinsic_height(m_image_loader.height());
|
|
}
|
|
|
|
if (m_image_loader.width() && m_image_loader.height()) {
|
|
set_intrinsic_aspect_ratio((float)m_image_loader.width() / (float)m_image_loader.height());
|
|
} else {
|
|
set_intrinsic_aspect_ratio({});
|
|
}
|
|
}
|
|
|
|
if (renders_as_alt_text()) {
|
|
auto& image_element = verify_cast<HTML::HTMLImageElement>(dom_node());
|
|
auto& font = Platform::FontPlugin::the().default_font();
|
|
auto alt = image_element.alt();
|
|
if (alt.is_empty())
|
|
alt = image_element.src();
|
|
|
|
CSSPixels alt_text_width = 0;
|
|
if (!m_cached_alt_text_width.has_value())
|
|
m_cached_alt_text_width = font.width(alt);
|
|
alt_text_width = m_cached_alt_text_width.value();
|
|
|
|
set_intrinsic_width(alt_text_width + 16);
|
|
set_intrinsic_height(font.pixel_size() + 16);
|
|
}
|
|
|
|
if (!has_intrinsic_width() && !has_intrinsic_height()) {
|
|
// FIXME: Do something.
|
|
}
|
|
}
|
|
|
|
void ImageBox::dom_node_did_update_alt_text(Badge<HTML::HTMLImageElement>)
|
|
{
|
|
m_cached_alt_text_width = {};
|
|
}
|
|
|
|
bool ImageBox::renders_as_alt_text() const
|
|
{
|
|
if (is<HTML::HTMLImageElement>(dom_node()))
|
|
return !m_image_loader.has_image();
|
|
return false;
|
|
}
|
|
|
|
void ImageBox::browsing_context_did_set_viewport_rect(CSSPixelRect const& viewport_rect)
|
|
{
|
|
m_image_loader.set_visible_in_viewport(paint_box() && viewport_rect.intersects(paint_box()->absolute_rect()));
|
|
}
|
|
|
|
JS::GCPtr<Painting::Paintable> ImageBox::create_paintable() const
|
|
{
|
|
return Painting::ImagePaintable::create(*this);
|
|
}
|
|
|
|
}
|