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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 <LibCore/Timer.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/ImageDecoder.h>
#include <LibWeb/CSS/StyleResolver.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Event.h>
#include <LibWeb/DOM/HTMLImageElement.h>
#include <LibWeb/Layout/LayoutImage.h>
#include <LibWeb/Loader/ResourceLoader.h>
namespace Web {
HTMLImageElement::HTMLImageElement(Document& document, const FlyString& tag_name)
: HTMLElement(document, tag_name)
, m_timer(Core::Timer::construct())
{
}
HTMLImageElement::~HTMLImageElement()
{
}
void HTMLImageElement::parse_attribute(const FlyString& name, const String& value)
{
if (name.equals_ignoring_case("src"))
load_image(value);
}
void HTMLImageElement::load_image(const String& src)
{
LoadRequest request;
request.set_url(document().complete_url(src));
set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
}
void HTMLImageElement::resource_did_load()
{
ASSERT(resource());
if (!resource()->has_encoded_data()) {
dbg() << "HTMLImageElement: Resource did load, but encoded data empty: " << this->src();
return;
}
dbg() << "HTMLImageElement: Resource did load, encoded data looks tasty: " << this->src();
m_image_decoder = resource()->ensure_decoder();
if (m_image_decoder->is_animated() && m_image_decoder->frame_count() > 1) {
const auto& first_frame = m_image_decoder->frame(0);
m_timer->set_interval(first_frame.duration);
m_timer->on_timeout = [this] { animate(); };
m_timer->start();
}
document().update_layout();
dispatch_event(Event::create("load"));
}
void HTMLImageElement::resource_did_fail()
{
dbg() << "HTMLImageElement: Resource did fail: " << this->src();
m_image_decoder = nullptr;
document().update_layout();
dispatch_event(Event::create("error"));
}
void HTMLImageElement::resource_did_replace_decoder()
{
m_image_decoder = resource()->ensure_decoder();
}
void HTMLImageElement::animate()
{
if (!layout_node()) {
return;
}
m_current_frame_index = (m_current_frame_index + 1) % m_image_decoder->frame_count();
const auto& current_frame = m_image_decoder->frame(m_current_frame_index);
if (current_frame.duration != m_timer->interval()) {
m_timer->restart(current_frame.duration);
}
if (m_current_frame_index == m_image_decoder->frame_count() - 1) {
++m_loops_completed;
if (m_loops_completed > 0 && m_loops_completed == m_image_decoder->loop_count()) {
m_timer->stop();
}
}
layout_node()->set_needs_display();
}
int HTMLImageElement::preferred_width() const
{
bool ok = false;
int width = attribute(HTML::AttributeNames::width).to_int(ok);
if (ok)
return width;
if (m_image_decoder)
return m_image_decoder->width();
return 0;
}
int HTMLImageElement::preferred_height() const
{
bool ok = false;
int height = attribute(HTML::AttributeNames::height).to_int(ok);
if (ok)
return height;
if (m_image_decoder)
return m_image_decoder->height();
return 0;
}
RefPtr<LayoutNode> HTMLImageElement::create_layout_node(const StyleProperties* parent_style) const
{
auto style = document().style_resolver().resolve_style(*this, parent_style);
auto display = style->string_or_fallback(CSS::PropertyID::Display, "inline");
if (display == "none")
return nullptr;
return adopt(*new LayoutImage(*this, move(style)));
}
const Gfx::Bitmap* HTMLImageElement::bitmap() const
{
if (!m_image_decoder)
return nullptr;
if (m_image_decoder->is_animated()) {
return m_image_decoder->frame(m_current_frame_index).image;
}
return m_image_decoder->bitmap();
}
void HTMLImageElement::set_visible_in_viewport(Badge<LayoutDocument>, bool visible_in_viewport)
{
if (m_visible_in_viewport == visible_in_viewport)
return;
m_visible_in_viewport = visible_in_viewport;
// FIXME: Don't update volatility every time. If we're here, we're probably scanning through
// the whole document, updating "is visible in viewport" flags, and this could lead
// to the same bitmap being marked volatile back and forth unnecessarily.
if (resource())
resource()->update_volatility();
}
}
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