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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "third_party/blink/renderer/core/html/html_image_loader.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/html/forms/html_input_element.h"
#include "third_party/blink/renderer/core/html/html_image_element.h"
#include "third_party/blink/renderer/core/html/html_object_element.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/loader/resource/image_resource_content.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_loading_log.h"
namespace blink {
HTMLImageLoader::HTMLImageLoader(Element* element) : ImageLoader(element) {}
HTMLImageLoader::~HTMLImageLoader() = default;
void HTMLImageLoader::DispatchLoadEvent() {
RESOURCE_LOADING_DVLOG(1) << "HTMLImageLoader::dispatchLoadEvent " << this;
// HTMLVideoElement uses this class to load the poster image, but it should
// not fire events for loading or failure.
if (IsA<HTMLVideoElement>(*GetElement()))
return;
bool error_occurred = GetContent()->ErrorOccurred();
if (IsA<HTMLObjectElement>(*GetElement()) && !error_occurred) {
// An <object> considers a 404 to be an error and should fire onerror.
error_occurred = (GetContent()->GetResponse().HttpStatusCode() >= 400);
}
GetElement()->DispatchEvent(*Event::Create(
error_occurred ? event_type_names::kError : event_type_names::kLoad));
}
void HTMLImageLoader::NoImageResourceToLoad() {
// FIXME: Use fallback content even when there is no alt-text. The only
// blocker is the large amount of rebaselining it requires.
if (To<HTMLElement>(GetElement())->AltText().IsEmpty())
return;
if (auto* image = DynamicTo<HTMLImageElement>(GetElement()))
image->EnsureCollapsedOrFallbackContent();
else if (auto* input = DynamicTo<HTMLInputElement>(GetElement()))
input->EnsureFallbackContent();
}
void HTMLImageLoader::ImageNotifyFinished(ImageResourceContent*) {
ImageResourceContent* cached_image = GetContent();
Element* element = GetElement();
ImageLoader::ImageNotifyFinished(cached_image);
bool load_error = cached_image->ErrorOccurred();
if (auto* image = DynamicTo<HTMLImageElement>(*element)) {
if (load_error)
image->EnsureCollapsedOrFallbackContent();
else
image->EnsurePrimaryContent();
}
if (auto* input = DynamicTo<HTMLInputElement>(*element)) {
if (load_error)
input->EnsureFallbackContent();
else
input->EnsurePrimaryContent();
}
auto* html_image_element = DynamicTo<HTMLObjectElement>(element);
if ((load_error || cached_image->GetResponse().HttpStatusCode() >= 400) &&
html_image_element)
html_image_element->RenderFallbackContent(nullptr);
}
} // namespace blink
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