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Diffstat (limited to '')
| -rw-r--r-- | dom/html/ImageDocument.cpp | 814 |
1 files changed, 814 insertions, 0 deletions
diff --git a/dom/html/ImageDocument.cpp b/dom/html/ImageDocument.cpp new file mode 100644 index 0000000000..81fc9860ee --- /dev/null +++ b/dom/html/ImageDocument.cpp @@ -0,0 +1,814 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "ImageDocument.h" +#include "mozilla/AutoRestore.h" +#include "mozilla/ComputedStyle.h" +#include "mozilla/dom/BrowserChild.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/ImageDocumentBinding.h" +#include "mozilla/dom/HTMLImageElement.h" +#include "mozilla/dom/MouseEvent.h" +#include "mozilla/LoadInfo.h" +#include "mozilla/PresShell.h" +#include "mozilla/StaticPrefs_browser.h" +#include "nsICSSDeclaration.h" +#include "nsObjectLoadingContent.h" +#include "nsRect.h" +#include "nsIImageLoadingContent.h" +#include "nsGenericHTMLElement.h" +#include "nsDocShell.h" +#include "DocumentInlines.h" +#include "nsDOMTokenList.h" +#include "nsIDOMEventListener.h" +#include "nsIFrame.h" +#include "nsGkAtoms.h" +#include "imgIRequest.h" +#include "imgIContainer.h" +#include "imgINotificationObserver.h" +#include "nsPresContext.h" +#include "nsIChannel.h" +#include "nsIContentPolicy.h" +#include "nsContentPolicyUtils.h" +#include "nsPIDOMWindow.h" +#include "nsError.h" +#include "nsURILoader.h" +#include "nsIDocShell.h" +#include "nsIContentViewer.h" +#include "nsThreadUtils.h" +#include "nsIScrollableFrame.h" +#include "nsContentUtils.h" +#include "mozilla/Preferences.h" +#include <algorithm> + +// XXX A hack needed for Firefox's site specific zoom. +static bool IsSiteSpecific() { + return !nsContentUtils::ShouldResistFingerprinting( + "This needs to read the global pref as long as " + "browser-fullZoom.js also does so.") && + mozilla::Preferences::GetBool("browser.zoom.siteSpecific", false); +} + +namespace mozilla::dom { + +class ImageListener : public MediaDocumentStreamListener { + public: + // NS_DECL_NSIREQUESTOBSERVER + // We only implement OnStartRequest; OnStopRequest is + // implemented by MediaDocumentStreamListener + NS_IMETHOD OnStartRequest(nsIRequest* aRequest) override; + + explicit ImageListener(ImageDocument* aDocument); + virtual ~ImageListener(); +}; + +ImageListener::ImageListener(ImageDocument* aDocument) + : MediaDocumentStreamListener(aDocument) {} + +ImageListener::~ImageListener() = default; + +NS_IMETHODIMP +ImageListener::OnStartRequest(nsIRequest* request) { + NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE); + + ImageDocument* imgDoc = static_cast<ImageDocument*>(mDocument.get()); + nsCOMPtr<nsIChannel> channel = do_QueryInterface(request); + if (!channel) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsPIDOMWindowOuter> domWindow = imgDoc->GetWindow(); + NS_ENSURE_TRUE(domWindow, NS_ERROR_UNEXPECTED); + + // Do a ShouldProcess check to see whether to keep loading the image. + nsCOMPtr<nsIURI> channelURI; + channel->GetURI(getter_AddRefs(channelURI)); + + nsAutoCString mimeType; + channel->GetContentType(mimeType); + + nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo(); + // query the corresponding arguments for the channel loadinfo and pass + // it on to the temporary loadinfo used for content policy checks. + nsCOMPtr<nsINode> requestingNode = domWindow->GetFrameElementInternal(); + nsCOMPtr<nsIPrincipal> loadingPrincipal; + if (requestingNode) { + loadingPrincipal = requestingNode->NodePrincipal(); + } else { + nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal( + channel, getter_AddRefs(loadingPrincipal)); + } + + nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new net::LoadInfo( + loadingPrincipal, loadInfo->TriggeringPrincipal(), requestingNode, + nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK, + nsIContentPolicy::TYPE_INTERNAL_IMAGE); + + int16_t decision = nsIContentPolicy::ACCEPT; + nsresult rv = NS_CheckContentProcessPolicy( + channelURI, secCheckLoadInfo, mimeType, &decision, + nsContentUtils::GetContentPolicy()); + + if (NS_FAILED(rv) || NS_CP_REJECTED(decision)) { + request->Cancel(NS_ERROR_CONTENT_BLOCKED); + return NS_OK; + } + + if (!imgDoc->mObservingImageLoader) { + NS_ENSURE_TRUE(imgDoc->mImageContent, NS_ERROR_UNEXPECTED); + imgDoc->mImageContent->AddNativeObserver(imgDoc); + imgDoc->mObservingImageLoader = true; + imgDoc->mImageContent->LoadImageWithChannel(channel, + getter_AddRefs(mNextStream)); + } + + return MediaDocumentStreamListener::OnStartRequest(request); +} + +ImageDocument::ImageDocument() + : MediaDocument(), + mVisibleWidth(0.0), + mVisibleHeight(0.0), + mImageWidth(0), + mImageHeight(0), + mImageIsResized(false), + mShouldResize(false), + mFirstResize(false), + mObservingImageLoader(false), + mTitleUpdateInProgress(false), + mHasCustomTitle(false), + mIsInObjectOrEmbed(false), + mOriginalZoomLevel(1.0), + mOriginalResolution(1.0) {} + +ImageDocument::~ImageDocument() = default; + +NS_IMPL_CYCLE_COLLECTION_INHERITED(ImageDocument, MediaDocument, mImageContent) + +NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(ImageDocument, MediaDocument, + imgINotificationObserver, + nsIDOMEventListener) + +nsresult ImageDocument::Init() { + nsresult rv = MediaDocument::Init(); + NS_ENSURE_SUCCESS(rv, rv); + + mShouldResize = StaticPrefs::browser_enable_automatic_image_resizing(); + mFirstResize = true; + + return NS_OK; +} + +JSObject* ImageDocument::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return ImageDocument_Binding::Wrap(aCx, this, aGivenProto); +} + +nsresult ImageDocument::StartDocumentLoad( + const char* aCommand, nsIChannel* aChannel, nsILoadGroup* aLoadGroup, + nsISupports* aContainer, nsIStreamListener** aDocListener, bool aReset) { + nsresult rv = MediaDocument::StartDocumentLoad( + aCommand, aChannel, aLoadGroup, aContainer, aDocListener, aReset); + if (NS_FAILED(rv)) { + return rv; + } + + mOriginalZoomLevel = IsSiteSpecific() ? 1.0 : GetZoomLevel(); + CheckFullZoom(); + mOriginalResolution = GetResolution(); + + if (BrowsingContext* context = GetBrowsingContext()) { + mIsInObjectOrEmbed = context->IsEmbedderTypeObjectOrEmbed(); + } + + NS_ASSERTION(aDocListener, "null aDocListener"); + *aDocListener = new ImageListener(this); + NS_ADDREF(*aDocListener); + + return NS_OK; +} + +void ImageDocument::Destroy() { + if (RefPtr<HTMLImageElement> img = std::move(mImageContent)) { + // Remove our event listener from the image content. + img->RemoveEventListener(u"load"_ns, this, false); + img->RemoveEventListener(u"click"_ns, this, false); + + // Break reference cycle with mImageContent, if we have one + if (mObservingImageLoader) { + img->RemoveNativeObserver(this); + } + } + + MediaDocument::Destroy(); +} + +void ImageDocument::SetScriptGlobalObject( + nsIScriptGlobalObject* aScriptGlobalObject) { + // If the script global object is changing, we need to unhook our event + // listeners on the window. + nsCOMPtr<EventTarget> target; + if (mScriptGlobalObject && aScriptGlobalObject != mScriptGlobalObject) { + target = do_QueryInterface(mScriptGlobalObject); + target->RemoveEventListener(u"resize"_ns, this, false); + target->RemoveEventListener(u"keypress"_ns, this, false); + } + + // Set the script global object on the superclass before doing + // anything that might require it.... + MediaDocument::SetScriptGlobalObject(aScriptGlobalObject); + + if (aScriptGlobalObject) { + if (!InitialSetupHasBeenDone()) { + MOZ_ASSERT(!GetRootElement(), "Where did the root element come from?"); + // Create synthetic document +#ifdef DEBUG + nsresult rv = +#endif + CreateSyntheticDocument(); + NS_ASSERTION(NS_SUCCEEDED(rv), "failed to create synthetic document"); + + target = mImageContent; + target->AddEventListener(u"load"_ns, this, false); + target->AddEventListener(u"click"_ns, this, false); + } + + target = do_QueryInterface(aScriptGlobalObject); + target->AddEventListener(u"resize"_ns, this, false); + target->AddEventListener(u"keypress"_ns, this, false); + + if (!InitialSetupHasBeenDone()) { + LinkStylesheet(u"resource://content-accessible/ImageDocument.css"_ns); + if (!nsContentUtils::IsChildOfSameType(this)) { + LinkStylesheet(nsLiteralString( + u"resource://content-accessible/TopLevelImageDocument.css")); + } + InitialSetupDone(); + } + } +} + +void ImageDocument::OnPageShow(bool aPersisted, + EventTarget* aDispatchStartTarget, + bool aOnlySystemGroup) { + if (aPersisted) { + mOriginalZoomLevel = IsSiteSpecific() ? 1.0 : GetZoomLevel(); + CheckFullZoom(); + mOriginalResolution = GetResolution(); + } + RefPtr<ImageDocument> kungFuDeathGrip(this); + UpdateSizeFromLayout(); + + MediaDocument::OnPageShow(aPersisted, aDispatchStartTarget, aOnlySystemGroup); +} + +void ImageDocument::ShrinkToFit() { + if (!mImageContent) { + return; + } + if (GetZoomLevel() != mOriginalZoomLevel && mImageIsResized && + !nsContentUtils::IsChildOfSameType(this)) { + // If we're zoomed, so that we don't maintain the invariant that + // mImageIsResized if and only if its displayed width/height fit in + // mVisibleWidth/mVisibleHeight, then we may need to switch to/from the + // overflowingVertical class here, because our viewport size may have + // changed and we don't plan to adjust the image size to compensate. Since + // mImageIsResized it has a "height" attribute set, and we can just get the + // displayed image height by getting .height on the HTMLImageElement. + // + // Hold strong ref, because Height() can run script. + RefPtr<HTMLImageElement> img = mImageContent; + uint32_t imageHeight = img->Height(); + nsDOMTokenList* classList = img->ClassList(); + if (imageHeight > mVisibleHeight) { + classList->Add(u"overflowingVertical"_ns, IgnoreErrors()); + } else { + classList->Remove(u"overflowingVertical"_ns, IgnoreErrors()); + } + return; + } + if (GetResolution() != mOriginalResolution && mImageIsResized) { + // Don't resize if resolution has changed, e.g., through pinch-zooming on + // Android. + return; + } + + // Keep image content alive while changing the attributes. + RefPtr<HTMLImageElement> image = mImageContent; + + uint32_t newWidth = std::max(1, NSToCoordFloor(GetRatio() * mImageWidth)); + uint32_t newHeight = std::max(1, NSToCoordFloor(GetRatio() * mImageHeight)); + image->SetWidth(newWidth, IgnoreErrors()); + image->SetHeight(newHeight, IgnoreErrors()); + + // The view might have been scrolled when zooming in, scroll back to the + // origin now that we're showing a shrunk-to-window version. + ScrollImageTo(0, 0); + + if (!mImageContent) { + // ScrollImageTo flush destroyed our content. + return; + } + + SetModeClass(eShrinkToFit); + + mImageIsResized = true; + + UpdateTitleAndCharset(); +} + +void ImageDocument::ScrollImageTo(int32_t aX, int32_t aY) { + RefPtr<PresShell> presShell = GetPresShell(); + if (!presShell) { + return; + } + + nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable(); + if (!sf) { + return; + } + + float ratio = GetRatio(); + // Don't try to scroll image if the document is not visible (mVisibleWidth or + // mVisibleHeight is zero). + if (ratio <= 0.0) { + return; + } + nsRect portRect = sf->GetScrollPortRect(); + sf->ScrollTo( + nsPoint( + nsPresContext::CSSPixelsToAppUnits(aX / ratio) - portRect.width / 2, + nsPresContext::CSSPixelsToAppUnits(aY / ratio) - portRect.height / 2), + ScrollMode::Instant); +} + +void ImageDocument::RestoreImage() { + if (!mImageContent) { + return; + } + // Keep image content alive while changing the attributes. + RefPtr<HTMLImageElement> imageContent = mImageContent; + imageContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::width, true); + imageContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::height, true); + + if (mIsInObjectOrEmbed) { + SetModeClass(eIsInObjectOrEmbed); + } else if (ImageIsOverflowing()) { + if (!ImageIsOverflowingVertically()) { + SetModeClass(eOverflowingHorizontalOnly); + } else { + SetModeClass(eOverflowingVertical); + } + } else { + SetModeClass(eNone); + } + + mImageIsResized = false; + + UpdateTitleAndCharset(); +} + +void ImageDocument::NotifyPossibleTitleChange(bool aBoundTitleElement) { + if (!mHasCustomTitle && !mTitleUpdateInProgress) { + mHasCustomTitle = true; + } + + Document::NotifyPossibleTitleChange(aBoundTitleElement); +} + +void ImageDocument::Notify(imgIRequest* aRequest, int32_t aType, + const nsIntRect* aData) { + if (aType == imgINotificationObserver::SIZE_AVAILABLE) { + nsCOMPtr<imgIContainer> image; + aRequest->GetImage(getter_AddRefs(image)); + return OnSizeAvailable(aRequest, image); + } + + // Run this using a script runner because HAS_TRANSPARENCY notifications can + // come during painting and this will trigger invalidation. + if (aType == imgINotificationObserver::HAS_TRANSPARENCY) { + nsCOMPtr<nsIRunnable> runnable = + NewRunnableMethod("dom::ImageDocument::OnHasTransparency", this, + &ImageDocument::OnHasTransparency); + nsContentUtils::AddScriptRunner(runnable); + } + + if (aType == imgINotificationObserver::LOAD_COMPLETE) { + uint32_t reqStatus; + aRequest->GetImageStatus(&reqStatus); + nsresult status = + reqStatus & imgIRequest::STATUS_ERROR ? NS_ERROR_FAILURE : NS_OK; + return OnLoadComplete(aRequest, status); + } +} + +void ImageDocument::OnHasTransparency() { + if (!mImageContent || nsContentUtils::IsChildOfSameType(this)) { + return; + } + + nsDOMTokenList* classList = mImageContent->ClassList(); + classList->Add(u"transparent"_ns, IgnoreErrors()); +} + +void ImageDocument::SetModeClass(eModeClasses mode) { + nsDOMTokenList* classList = mImageContent->ClassList(); + + if (mode == eShrinkToFit) { + classList->Add(u"shrinkToFit"_ns, IgnoreErrors()); + } else { + classList->Remove(u"shrinkToFit"_ns, IgnoreErrors()); + } + + if (mode == eOverflowingVertical) { + classList->Add(u"overflowingVertical"_ns, IgnoreErrors()); + } else { + classList->Remove(u"overflowingVertical"_ns, IgnoreErrors()); + } + + if (mode == eOverflowingHorizontalOnly) { + classList->Add(u"overflowingHorizontalOnly"_ns, IgnoreErrors()); + } else { + classList->Remove(u"overflowingHorizontalOnly"_ns, IgnoreErrors()); + } + + if (mode == eIsInObjectOrEmbed) { + classList->Add(u"isInObjectOrEmbed"_ns, IgnoreErrors()); + } +} + +void ImageDocument::OnSizeAvailable(imgIRequest* aRequest, + imgIContainer* aImage) { + int32_t oldWidth = mImageWidth; + int32_t oldHeight = mImageHeight; + + // Styles have not yet been applied, so we don't know the final size. For now, + // default to the image's intrinsic size. + aImage->GetWidth(&mImageWidth); + aImage->GetHeight(&mImageHeight); + + // Multipart images send size available for each part; ignore them if it + // doesn't change our size. (We may not even support changing size in + // multipart images in the future.) + if (oldWidth == mImageWidth && oldHeight == mImageHeight) { + return; + } + + nsCOMPtr<nsIRunnable> runnable = + NewRunnableMethod("dom::ImageDocument::DefaultCheckOverflowing", this, + &ImageDocument::DefaultCheckOverflowing); + nsContentUtils::AddScriptRunner(runnable); + UpdateTitleAndCharset(); +} + +void ImageDocument::OnLoadComplete(imgIRequest* aRequest, nsresult aStatus) { + UpdateTitleAndCharset(); + + // mImageContent can be null if the document is already destroyed + if (NS_FAILED(aStatus) && mImageContent) { + nsAutoCString src; + mDocumentURI->GetSpec(src); + AutoTArray<nsString, 1> formatString; + CopyUTF8toUTF16(src, *formatString.AppendElement()); + nsAutoString errorMsg; + FormatStringFromName("InvalidImage", formatString, errorMsg); + + mImageContent->SetAttr(kNameSpaceID_None, nsGkAtoms::alt, errorMsg, false); + } + + MaybeSendResultToEmbedder(aStatus); +} + +NS_IMETHODIMP +ImageDocument::HandleEvent(Event* aEvent) { + nsAutoString eventType; + aEvent->GetType(eventType); + if (eventType.EqualsLiteral("resize")) { + CheckOverflowing(false); + CheckFullZoom(); + } else if (eventType.EqualsLiteral("click") && + StaticPrefs::browser_enable_click_image_resizing() && + !mIsInObjectOrEmbed) { + ResetZoomLevel(); + mShouldResize = true; + if (mImageIsResized) { + int32_t x = 0, y = 0; + MouseEvent* event = aEvent->AsMouseEvent(); + if (event) { + RefPtr<HTMLImageElement> img = mImageContent; + x = event->ClientX() - img->OffsetLeft(); + y = event->ClientY() - img->OffsetTop(); + } + mShouldResize = false; + RestoreImage(); + FlushPendingNotifications(FlushType::Layout); + ScrollImageTo(x, y); + } else if (ImageIsOverflowing()) { + ShrinkToFit(); + } + } else if (eventType.EqualsLiteral("load")) { + UpdateSizeFromLayout(); + } + + return NS_OK; +} + +void ImageDocument::UpdateSizeFromLayout() { + // Pull an updated size from the content frame to account for any size + // change due to CSS properties like |image-orientation|. + if (!mImageContent) { + return; + } + + // Need strong ref, because GetPrimaryFrame can run script. + RefPtr<HTMLImageElement> imageContent = mImageContent; + nsIFrame* contentFrame = imageContent->GetPrimaryFrame(FlushType::Frames); + if (!contentFrame) { + return; + } + + nsIntSize oldSize(mImageWidth, mImageHeight); + IntrinsicSize newSize = contentFrame->GetIntrinsicSize(); + + if (newSize.width) { + mImageWidth = nsPresContext::AppUnitsToFloatCSSPixels(*newSize.width); + } + if (newSize.height) { + mImageHeight = nsPresContext::AppUnitsToFloatCSSPixels(*newSize.height); + } + + // Ensure that our information about overflow is up-to-date if needed. + if (mImageWidth != oldSize.width || mImageHeight != oldSize.height) { + CheckOverflowing(false); + } +} + +void ImageDocument::UpdateRemoteStyle(StyleImageRendering aImageRendering) { + if (!mImageContent) { + return; + } + + // Using ScriptRunner to avoid doing DOM mutation at an unexpected time. + if (!nsContentUtils::IsSafeToRunScript()) { + return nsContentUtils::AddScriptRunner( + NewRunnableMethod<StyleImageRendering>( + "UpdateRemoteStyle", this, &ImageDocument::UpdateRemoteStyle, + aImageRendering)); + } + + nsCOMPtr<nsICSSDeclaration> style = mImageContent->Style(); + switch (aImageRendering) { + case StyleImageRendering::Auto: + case StyleImageRendering::Smooth: + case StyleImageRendering::Optimizequality: + style->SetProperty("image-rendering"_ns, "auto"_ns, ""_ns, + IgnoreErrors()); + break; + case StyleImageRendering::Optimizespeed: + case StyleImageRendering::Pixelated: + style->SetProperty("image-rendering"_ns, "pixelated"_ns, ""_ns, + IgnoreErrors()); + break; + case StyleImageRendering::CrispEdges: + style->SetProperty("image-rendering"_ns, "crisp-edges"_ns, ""_ns, + IgnoreErrors()); + break; + } +} + +nsresult ImageDocument::CreateSyntheticDocument() { + // Synthesize an html document that refers to the image + nsresult rv = MediaDocument::CreateSyntheticDocument(); + NS_ENSURE_SUCCESS(rv, rv); + + // Add the image element + RefPtr<Element> body = GetBodyElement(); + if (!body) { + NS_WARNING("no body on image document!"); + return NS_ERROR_FAILURE; + } + + RefPtr<mozilla::dom::NodeInfo> nodeInfo; + nodeInfo = mNodeInfoManager->GetNodeInfo( + nsGkAtoms::img, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE); + + RefPtr<Element> image = NS_NewHTMLImageElement(nodeInfo.forget()); + mImageContent = HTMLImageElement::FromNodeOrNull(image); + if (!mImageContent) { + return NS_ERROR_OUT_OF_MEMORY; + } + + nsAutoCString src; + mDocumentURI->GetSpec(src); + + NS_ConvertUTF8toUTF16 srcString(src); + // Make sure not to start the image load from here... + mImageContent->SetLoadingEnabled(false); + mImageContent->SetAttr(kNameSpaceID_None, nsGkAtoms::src, srcString, false); + mImageContent->SetAttr(kNameSpaceID_None, nsGkAtoms::alt, srcString, false); + + body->AppendChildTo(mImageContent, false, IgnoreErrors()); + mImageContent->SetLoadingEnabled(true); + + return NS_OK; +} + +void ImageDocument::DefaultCheckOverflowing() { + CheckOverflowing(StaticPrefs::browser_enable_automatic_image_resizing()); +} + +nsresult ImageDocument::CheckOverflowing(bool changeState) { + const bool imageWasOverflowing = ImageIsOverflowing(); + const bool imageWasOverflowingVertically = ImageIsOverflowingVertically(); + + { + nsPresContext* context = GetPresContext(); + if (!context) { + return NS_OK; + } + + nsRect visibleArea = context->GetVisibleArea(); + + mVisibleWidth = nsPresContext::AppUnitsToFloatCSSPixels(visibleArea.width); + mVisibleHeight = + nsPresContext::AppUnitsToFloatCSSPixels(visibleArea.height); + } + + const bool windowBecameBigEnough = + imageWasOverflowing && !ImageIsOverflowing(); + const bool verticalOverflowChanged = + imageWasOverflowingVertically != ImageIsOverflowingVertically(); + + if (changeState || mShouldResize || mFirstResize || windowBecameBigEnough || + verticalOverflowChanged) { + if (mIsInObjectOrEmbed) { + SetModeClass(eIsInObjectOrEmbed); + } else if (ImageIsOverflowing() && (changeState || mShouldResize)) { + ShrinkToFit(); + } else if (mImageIsResized || mFirstResize || windowBecameBigEnough) { + RestoreImage(); + } else if (!mImageIsResized && verticalOverflowChanged) { + if (ImageIsOverflowingVertically()) { + SetModeClass(eOverflowingVertical); + } else { + SetModeClass(eOverflowingHorizontalOnly); + } + } + } + mFirstResize = false; + return NS_OK; +} + +void ImageDocument::UpdateTitleAndCharset() { + if (mHasCustomTitle) { + return; + } + + AutoRestore<bool> restore(mTitleUpdateInProgress); + mTitleUpdateInProgress = true; + + nsAutoCString typeStr; + nsCOMPtr<imgIRequest> imageRequest; + if (mImageContent) { + mImageContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, + getter_AddRefs(imageRequest)); + } + + if (imageRequest) { + nsCString mimeType; + imageRequest->GetMimeType(getter_Copies(mimeType)); + ToUpperCase(mimeType); + nsCString::const_iterator start, end; + mimeType.BeginReading(start); + mimeType.EndReading(end); + nsCString::const_iterator iter = end; + if (FindInReadable("IMAGE/"_ns, start, iter) && iter != end) { + // strip out "X-" if any + if (*iter == 'X') { + ++iter; + if (iter != end && *iter == '-') { + ++iter; + if (iter == end) { + // looks like "IMAGE/X-" is the type?? Bail out of here. + mimeType.BeginReading(iter); + } + } else { + --iter; + } + } + typeStr = Substring(iter, end); + } else { + typeStr = mimeType; + } + } + + nsAutoString status; + if (mImageIsResized) { + AutoTArray<nsString, 1> formatString; + formatString.AppendElement()->AppendInt(NSToCoordFloor(GetRatio() * 100)); + + FormatStringFromName("ScaledImage", formatString, status); + } + + static const char* const formatNames[4] = { + "ImageTitleWithNeitherDimensionsNorFile", + "ImageTitleWithoutDimensions", + "ImageTitleWithDimensions2", + "ImageTitleWithDimensions2AndFile", + }; + + MediaDocument::UpdateTitleAndCharset(typeStr, mChannel, formatNames, + mImageWidth, mImageHeight, status); +} + +void ImageDocument::ResetZoomLevel() { + if (nsContentUtils::IsChildOfSameType(this)) { + return; + } + + if (RefPtr<BrowsingContext> bc = GetBrowsingContext()) { + // Resetting the zoom level on a discarded browsing context has no effect. + Unused << bc->SetFullZoom(mOriginalZoomLevel); + } +} + +float ImageDocument::GetZoomLevel() { + if (BrowsingContext* bc = GetBrowsingContext()) { + return bc->FullZoom(); + } + return mOriginalZoomLevel; +} + +void ImageDocument::CheckFullZoom() { + nsDOMTokenList* classList = + mImageContent ? mImageContent->ClassList() : nullptr; + + if (!classList) { + return; + } + + classList->Toggle(u"fullZoomOut"_ns, + dom::Optional<bool>(GetZoomLevel() > mOriginalZoomLevel), + IgnoreErrors()); + classList->Toggle(u"fullZoomIn"_ns, + dom::Optional<bool>(GetZoomLevel() < mOriginalZoomLevel), + IgnoreErrors()); +} + +float ImageDocument::GetResolution() { + if (PresShell* presShell = GetPresShell()) { + return presShell->GetResolution(); + } + return mOriginalResolution; +} + +void ImageDocument::MaybeSendResultToEmbedder(nsresult aResult) { + if (!mIsInObjectOrEmbed) { + return; + } + + BrowsingContext* context = GetBrowsingContext(); + + if (!context) { + return; + } + + if (context->GetParent() && context->GetParent()->IsInProcess()) { + if (Element* embedder = context->GetEmbedderElement()) { + if (nsCOMPtr<nsIObjectLoadingContent> objectLoadingContent = + do_QueryInterface(embedder)) { + NS_DispatchToMainThread(NS_NewRunnableFunction( + "nsObjectLoadingContent::SubdocumentImageLoadComplete", + [objectLoadingContent, aResult]() { + static_cast<nsObjectLoadingContent*>(objectLoadingContent.get()) + ->SubdocumentImageLoadComplete(aResult); + })); + } + return; + } + } + + if (BrowserChild* browserChild = + BrowserChild::GetFrom(context->GetDocShell())) { + browserChild->SendImageLoadComplete(aResult); + } +} +} // namespace mozilla::dom + +nsresult NS_NewImageDocument(mozilla::dom::Document** aResult) { + auto* doc = new mozilla::dom::ImageDocument(); + NS_ADDREF(doc); + + nsresult rv = doc->Init(); + if (NS_FAILED(rv)) { + NS_RELEASE(doc); + } + + *aResult = doc; + + return rv; +} |