forked from mirrors/gecko-dev
073241f091
This code seems to have been broken quite some time ago, but without adverse effect. I have filed bug 1691868 so that a proper fix can be found. In the meantime, this preserves the current behavior and is less confusing. Differential Revision: https://phabricator.services.mozilla.com/D104634
130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/widget/IconLoader.h"
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#include "gfxPlatform.h"
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#include "imgIContainer.h"
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#include "imgLoader.h"
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#include "imgRequestProxy.h"
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#include "mozilla/dom/Document.h"
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#include "nsContentUtils.h"
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#include "nsIContent.h"
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#include "nsIContentPolicy.h"
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using namespace mozilla;
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namespace mozilla::widget {
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NS_IMPL_ISUPPORTS(IconLoader, imgINotificationObserver)
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IconLoader::IconLoader(Listener* aListener) : mListener(aListener) {}
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IconLoader::~IconLoader() { Destroy(); }
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void IconLoader::Destroy() {
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if (mIconRequest) {
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mIconRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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mListener = nullptr;
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}
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nsresult IconLoader::LoadIcon(nsIURI* aIconURI, nsINode* aNode,
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bool aIsInternalIcon) {
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if (mIconRequest) {
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// Another icon request is already in flight. Kill it.
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mIconRequest->Cancel(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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if (!aNode) {
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return NS_ERROR_FAILURE;
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}
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RefPtr<mozilla::dom::Document> document = aNode->OwnerDoc();
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nsCOMPtr<nsILoadGroup> loadGroup = document->GetDocumentLoadGroup();
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if (!loadGroup) {
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return NS_ERROR_FAILURE;
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}
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RefPtr<imgLoader> loader = nsContentUtils::GetImgLoaderForDocument(document);
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if (!loader) {
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return NS_ERROR_FAILURE;
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}
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nsresult rv;
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if (aIsInternalIcon) {
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rv = loader->LoadImage(
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aIconURI, nullptr, nullptr, nullptr, 0, loadGroup, this, nullptr,
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nullptr, nsIRequest::LOAD_NORMAL, nullptr,
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nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
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/* aUseUrgentStartForChannel */ false, /* aLinkPreload */ false,
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getter_AddRefs(mIconRequest));
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} else {
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// TODO: nsIContentPolicy::TYPE_INTERNAL_IMAGE may not be the correct
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// policy. See bug 1691868 for more details.
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rv = loader->LoadImage(
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aIconURI, nullptr, nullptr, aNode->NodePrincipal(), 0, loadGroup, this,
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aNode, document, nsIRequest::LOAD_NORMAL, nullptr,
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nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
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/* aUseUrgentStartForChannel */ false,
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/* aLinkPreload */ false, getter_AddRefs(mIconRequest));
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}
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if (NS_FAILED(rv)) {
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return rv;
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}
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return NS_OK;
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}
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//
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// imgINotificationObserver
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//
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void IconLoader::Notify(imgIRequest* aRequest, int32_t aType,
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const nsIntRect* aData) {
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if (aType == imgINotificationObserver::LOAD_COMPLETE) {
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// Make sure the image loaded successfully.
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uint32_t status = imgIRequest::STATUS_ERROR;
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if (NS_FAILED(aRequest->GetImageStatus(&status)) ||
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(status & imgIRequest::STATUS_ERROR)) {
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mIconRequest->Cancel(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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return;
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}
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nsCOMPtr<imgIContainer> image;
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aRequest->GetImage(getter_AddRefs(image));
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MOZ_ASSERT(image);
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// Ask the image to decode at its intrinsic size.
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int32_t width = 0, height = 0;
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image->GetWidth(&width);
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image->GetHeight(&height);
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image->RequestDecodeForSize(nsIntSize(width, height),
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imgIContainer::FLAG_HIGH_QUALITY_SCALING);
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}
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if (aType == imgINotificationObserver::FRAME_COMPLETE) {
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nsCOMPtr<imgIContainer> image;
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aRequest->GetImage(getter_AddRefs(image));
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MOZ_ASSERT(image);
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if (mListener) {
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mListener->OnComplete(image);
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}
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return;
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}
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if (aType == imgINotificationObserver::DECODE_COMPLETE) {
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if (mIconRequest && mIconRequest == aRequest) {
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mIconRequest->Cancel(NS_BINDING_ABORTED);
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mIconRequest = nullptr;
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}
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}
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}
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} // namespace mozilla::widget
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