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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 "mozilla/dom/Document.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
using namespace mozilla;
using mozilla::gfx::SourceSurface;
namespace mozilla::widget {
NS_IMPL_CYCLE_COLLECTION(mozilla::widget::IconLoader, mContent, mHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(mozilla::widget::IconLoader)
NS_INTERFACE_MAP_ENTRY(imgINotificationObserver)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(mozilla::widget::IconLoader)
NS_IMPL_CYCLE_COLLECTING_RELEASE(mozilla::widget::IconLoader)
IconLoader::IconLoader(Helper* aHelper, nsINode* aContent,
const nsIntRect& aImageRegionRect)
: mContent(aContent),
mContentType(nsIContentPolicy::TYPE_INTERNAL_IMAGE),
mImageRegionRect(aImageRegionRect),
mLoadedIcon(false),
mHelper(aHelper) {}
IconLoader::~IconLoader() { Destroy(); }
void IconLoader::Destroy() {
if (mIconRequest) {
mIconRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
mIconRequest = nullptr;
}
if (mHelper) {
mHelper = nullptr;
}
}
nsresult IconLoader::LoadIcon(nsIURI* aIconURI, bool aIsInternalIcon) {
if (mIconRequest) {
// Another icon request is already in flight. Kill it.
mIconRequest->Cancel(NS_BINDING_ABORTED);
mIconRequest = nullptr;
}
mLoadedIcon = false;
if (!mContent) {
return NS_ERROR_FAILURE;
}
RefPtr<mozilla::dom::Document> document = mContent->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, mContentType, u""_ns,
/* aUseUrgentStartForChannel */ false, /* aLinkPreload */ false,
getter_AddRefs(mIconRequest));
} else {
rv = loader->LoadImage(
aIconURI, nullptr, nullptr, mContent->NodePrincipal(), 0, loadGroup,
this, mContent, document, nsIRequest::LOAD_NORMAL, nullptr,
mContentType, u""_ns, /* aUseUrgentStartForChannel */ false,
/* aLinkPreload */ false, 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->Cancel(NS_BINDING_ABORTED);
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) {
nsresult rv = OnFrameComplete(aRequest);
if (NS_FAILED(rv)) {
return;
}
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
MOZ_ASSERT(image);
mHelper->OnComplete(image, mImageRegionRect);
return;
}
if (aType == imgINotificationObserver::DECODE_COMPLETE) {
if (mIconRequest && mIconRequest == aRequest) {
mIconRequest->Cancel(NS_BINDING_ABORTED);
mIconRequest = nullptr;
}
}
}
nsresult IconLoader::OnFrameComplete(imgIRequest* aRequest) {
if (aRequest != mIconRequest) {
return NS_ERROR_FAILURE;
}
// Only support one frame.
if (mLoadedIcon) {
return NS_OK;
}
nsCOMPtr<imgIContainer> imageContainer;
aRequest->GetImage(getter_AddRefs(imageContainer));
if (!imageContainer) {
return NS_ERROR_FAILURE;
}
int32_t origWidth = 0, origHeight = 0;
imageContainer->GetWidth(&origWidth);
imageContainer->GetHeight(&origHeight);
// If the image region is invalid, don't draw the image to almost match
// the behavior of other platforms.
if (!mImageRegionRect.IsEmpty() && (mImageRegionRect.XMost() > origWidth ||
mImageRegionRect.YMost() > origHeight)) {
return NS_ERROR_FAILURE;
}
if (mImageRegionRect.IsEmpty()) {
mImageRegionRect.SetRect(0, 0, origWidth, origHeight);
}
mLoadedIcon = true;
return NS_OK;
}
} // namespace mozilla::widget
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