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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <LibGfx/Bitmap.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Loader/ImageLoader.h>
#include <LibWeb/Loader/ResourceLoader.h>
#include <LibWeb/Platform/Timer.h>
namespace Web {
ImageLoader::ImageLoader(DOM::Element& owner_element)
: m_owner_element(owner_element)
, m_timer(Platform::Timer::create())
{
}
void ImageLoader::adopt_object_resource(Badge<HTML::HTMLObjectElement>, Resource& resource)
{
auto image_resource = ImageResource::convert_from_resource(resource);
set_resource(image_resource);
}
void ImageLoader::load(const AK::URL& url)
{
m_redirects_count = 0;
load_without_resetting_redirect_counter(url);
}
void ImageLoader::load_without_resetting_redirect_counter(AK::URL const& url)
{
m_loading_state = LoadingState::Loading;
auto request = LoadRequest::create_for_url_on_page(url, m_owner_element.document().page());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
}
void ImageLoader::set_visible_in_viewport(bool visible_in_viewport) const
{
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())
const_cast<ImageResource*>(resource())->update_volatility();
}
void ImageLoader::resource_did_load()
{
VERIFY(resource());
// For 3xx (Redirection) responses, the Location value refers to the preferred target resource for automatically redirecting the request.
auto status_code = resource()->status_code();
if (status_code.has_value() && *status_code >= 300 && *status_code <= 399) {
auto location = resource()->response_headers().get("Location");
if (location.has_value()) {
if (m_redirects_count > maximum_redirects_allowed) {
m_redirects_count = 0;
m_loading_state = LoadingState::Failed;
if (on_fail)
on_fail();
return;
}
m_redirects_count++;
load_without_resetting_redirect_counter(resource()->url().complete_url(location.value()));
return;
}
}
m_redirects_count = 0;
if (!resource()->mime_type().starts_with("image/"sv)) {
m_loading_state = LoadingState::Failed;
if (on_fail)
on_fail();
return;
}
m_loading_state = LoadingState::Loaded;
if constexpr (IMAGE_LOADER_DEBUG) {
if (!resource()->has_encoded_data()) {
dbgln("ImageLoader: Resource did load, no encoded data. URL: {}", resource()->url());
} else {
dbgln("ImageLoader: Resource did load, has encoded data. URL: {}", resource()->url());
}
}
if (resource()->is_animated() && resource()->frame_count() > 1) {
m_timer->set_interval(resource()->frame_duration(0));
m_timer->on_timeout = [this] { animate(); };
m_timer->start();
}
if (on_load)
on_load();
}
void ImageLoader::animate()
{
if (!m_visible_in_viewport)
return;
m_current_frame_index = (m_current_frame_index + 1) % resource()->frame_count();
auto current_frame_duration = resource()->frame_duration(m_current_frame_index);
if (current_frame_duration != m_timer->interval()) {
m_timer->restart(current_frame_duration);
}
if (m_current_frame_index == resource()->frame_count() - 1) {
++m_loops_completed;
if (m_loops_completed > 0 && m_loops_completed == resource()->loop_count()) {
m_timer->stop();
}
}
if (on_animate)
on_animate();
}
void ImageLoader::resource_did_fail()
{
dbgln("ImageLoader: Resource did fail. URL: {}", resource()->url());
m_loading_state = LoadingState::Failed;
if (on_fail)
on_fail();
}
bool ImageLoader::has_image() const
{
if (!resource())
return false;
return bitmap(0);
}
unsigned ImageLoader::width() const
{
if (!resource())
return 0;
return bitmap(0) ? bitmap(0)->width() : 0;
}
unsigned ImageLoader::height() const
{
if (!resource())
return 0;
return bitmap(0) ? bitmap(0)->height() : 0;
}
Gfx::Bitmap const* ImageLoader::bitmap(size_t frame_index) const
{
if (!resource())
return nullptr;
return resource()->bitmap(frame_index);
}
}
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