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https://github.com/RGBCube/serenity
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95d70addd8
Since more DOM nodes are going to want to load images (<object>, ...) this patch splits out the image loading logic into an ImageLoader class and then HTMLImageElement simply has an ImageLoader. LayoutImage is then given a const ImageLoader& at construction and can then provide layout and rendering for many kinds of DOM nodes.
139 lines
4.7 KiB
C++
139 lines
4.7 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 <LibCore/Timer.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/ImageDecoder.h>
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#include <LibWeb/CSS/StyleResolver.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/DOM/HTMLImageElement.h>
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#include <LibWeb/Layout/LayoutImage.h>
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#include <LibWeb/Loader/ResourceLoader.h>
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namespace Web {
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HTMLImageElement::HTMLImageElement(Document& document, const FlyString& tag_name)
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: HTMLElement(document, tag_name)
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, m_timer(Core::Timer::construct())
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{
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m_image_loader.on_load = [this] {
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if (image_decoder() && image_decoder()->is_animated() && image_decoder()->frame_count() > 1) {
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const auto& first_frame = image_decoder()->frame(0);
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m_timer->set_interval(first_frame.duration);
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m_timer->on_timeout = [this] { animate(); };
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m_timer->start();
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}
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this->document().update_layout();
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dispatch_event(Event::create("load"));
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};
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m_image_loader.on_fail = [this] {
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dbg() << "HTMLImageElement: Resource did fail: " << this->src();
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this->document().update_layout();
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dispatch_event(Event::create("error"));
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};
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}
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HTMLImageElement::~HTMLImageElement()
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{
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}
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void HTMLImageElement::parse_attribute(const FlyString& name, const String& value)
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{
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HTMLElement::parse_attribute(name, value);
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if (name == HTML::AttributeNames::src)
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m_image_loader.load(document().complete_url(value));
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}
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void HTMLImageElement::animate()
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{
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if (!layout_node())
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return;
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auto* decoder = image_decoder();
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ASSERT(decoder);
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m_current_frame_index = (m_current_frame_index + 1) % decoder->frame_count();
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const auto& current_frame = decoder->frame(m_current_frame_index);
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if (current_frame.duration != m_timer->interval()) {
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m_timer->restart(current_frame.duration);
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}
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if (m_current_frame_index == decoder->frame_count() - 1) {
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++m_loops_completed;
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if (m_loops_completed > 0 && m_loops_completed == decoder->loop_count()) {
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m_timer->stop();
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}
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}
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layout_node()->set_needs_display();
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}
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#if 0
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int HTMLImageElement::preferred_width() const
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{
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return attribute(HTML::AttributeNames::width).to_int().value_or(m_image_decoder ? m_image_decoder->width() : 0);
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}
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int HTMLImageElement::preferred_height() const
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{
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return attribute(HTML::AttributeNames::height).to_int().value_or(m_image_decoder ? m_image_decoder->height() : 0);
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}
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#endif
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RefPtr<LayoutNode> HTMLImageElement::create_layout_node(const StyleProperties* parent_style) const
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{
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auto style = document().style_resolver().resolve_style(*this, parent_style);
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auto display = style->string_or_fallback(CSS::PropertyID::Display, "inline");
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if (display == "none")
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return nullptr;
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return adopt(*new LayoutImage(*this, move(style), m_image_loader));
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}
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const Gfx::ImageDecoder* HTMLImageElement::image_decoder() const
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{
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return m_image_loader.image_decoder();
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}
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const Gfx::Bitmap* HTMLImageElement::bitmap() const
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{
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auto* decoder = image_decoder();
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if (!decoder)
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return nullptr;
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if (decoder->is_animated())
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return decoder->frame(m_current_frame_index).image;
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return decoder->bitmap();
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}
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void HTMLImageElement::set_visible_in_viewport(Badge<LayoutDocument>, bool visible_in_viewport)
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{
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m_image_loader.set_visible_in_viewport(visible_in_viewport);
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}
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}
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