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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/widget/IconLoader.h"
#include "gfxPlatform.h"
#include "imgIContainer.h"
#include "imgLoader.h"
#include "imgRequestProxy.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/FetchPriority.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsIContentPolicy.h"
using namespace mozilla;
namespace mozilla::widget {
NS_IMPL_ISUPPORTS(IconLoader, imgINotificationObserver)
IconLoader::IconLoader(Listener* aListener) : mListener(aListener) {}
IconLoader::~IconLoader() { Destroy(); }
void IconLoader::Destroy() {
if (mIconRequest) {
mIconRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
mIconRequest = nullptr;
}
mListener = nullptr;
}
nsresult IconLoader::LoadIcon(nsIURI* aIconURI, nsINode* aNode,
bool aIsInternalIcon) {
if (mIconRequest) {
// Another icon request is already in flight. Kill it.
mIconRequest->CancelWithReason(
NS_BINDING_ABORTED, "Another icon request is already in flight"_ns);
mIconRequest = nullptr;
}
if (!aNode) {
return NS_ERROR_FAILURE;
}
RefPtr<mozilla::dom::Document> document = aNode->OwnerDoc();
nsCOMPtr<nsILoadGroup> loadGroup = document->GetDocumentLoadGroup();
if (!loadGroup) {
return NS_ERROR_FAILURE;
}
RefPtr<imgLoader> loader = nsContentUtils::GetImgLoaderForDocument(document);
if (!loader) {
return NS_ERROR_FAILURE;
}
nsresult rv;
if (aIsInternalIcon) {
rv = loader->LoadImage(
aIconURI, nullptr, nullptr, nullptr, 0, loadGroup, this, nullptr,
nullptr, nsIRequest::LOAD_NORMAL, nullptr,
nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
/* aUseUrgentStartForChannel */ false, /* aLinkPreload */ false, 0,
dom::FetchPriority::Auto, getter_AddRefs(mIconRequest));
} else {
// TODO: nsIContentPolicy::TYPE_INTERNAL_IMAGE may not be the correct
// policy. See bug 1691868 for more details.
rv = loader->LoadImage(
aIconURI, nullptr, nullptr, aNode->NodePrincipal(), 0, loadGroup, this,
aNode, document, nsIRequest::LOAD_NORMAL, nullptr,
nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
/* aUseUrgentStartForChannel */ false,
/* aLinkPreload */ false, 0, dom::FetchPriority::Auto,
getter_AddRefs(mIconRequest));
}
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
//
// imgINotificationObserver
//
void IconLoader::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) {
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
// Make sure the image loaded successfully.
uint32_t status = imgIRequest::STATUS_ERROR;
if (NS_FAILED(aRequest->GetImageStatus(&status)) ||
(status & imgIRequest::STATUS_ERROR)) {
mIconRequest->CancelWithReason(NS_BINDING_ABORTED,
"GetImageStatus failed"_ns);
mIconRequest = nullptr;
return;
}
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
MOZ_ASSERT(image);
// Ask the image to decode at its intrinsic size.
int32_t width = 0, height = 0;
image->GetWidth(&width);
image->GetHeight(&height);
image->RequestDecodeForSize(nsIntSize(width, height),
imgIContainer::FLAG_HIGH_QUALITY_SCALING);
}
if (aType == imgINotificationObserver::FRAME_COMPLETE) {
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
MOZ_ASSERT(image);
if (mListener) {
mListener->OnComplete(image);
}
return;
}
if (aType == imgINotificationObserver::DECODE_COMPLETE) {
if (mIconRequest && mIconRequest == aRequest) {
mIconRequest->CancelWithReason(NS_BINDING_ABORTED, "DECODE_COMPLETE"_ns);
mIconRequest = nullptr;
}
}
}
} // namespace mozilla::widget
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