зеркало из https://github.com/mozilla/gecko-dev.git
2685 строки
93 KiB
C++
2685 строки
93 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/* rendering object for replaced elements with image data */
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#include "nsImageFrame.h"
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#include "TextDrawTarget.h"
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#include "gfx2DGlue.h"
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#include "gfxContext.h"
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#include "gfxUtils.h"
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#include "mozilla/ComputedStyle.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/Encoding.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Helpers.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/dom/GeneratedImageContent.h"
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#include "mozilla/dom/HTMLAreaElement.h"
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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/ResponsiveImageSelector.h"
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#include "mozilla/layers/RenderRootStateManager.h"
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#include "mozilla/layers/WebRenderLayerManager.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/PresShellInlines.h"
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#include "mozilla/Unused.h"
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#include "nsCOMPtr.h"
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#include "nsFontMetrics.h"
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#include "nsIImageLoadingContent.h"
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#include "nsImageLoadingContent.h"
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#include "nsString.h"
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#include "nsPrintfCString.h"
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#include "nsPresContext.h"
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#include "nsGkAtoms.h"
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#include "mozilla/dom/Document.h"
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#include "nsContentUtils.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsStyleConsts.h"
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#include "nsStyleCoord.h"
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#include "nsStyleUtil.h"
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#include "nsTransform2D.h"
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#include "nsImageMap.h"
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#include "nsIIOService.h"
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#include "nsILoadGroup.h"
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#include "nsISupportsPriority.h"
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#include "nsNetUtil.h"
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#include "nsNetCID.h"
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#include "nsCSSRendering.h"
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#include "nsNameSpaceManager.h"
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#include <algorithm>
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#ifdef ACCESSIBILITY
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# include "nsAccessibilityService.h"
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#endif
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#include "nsLayoutUtils.h"
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#include "nsDisplayList.h"
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#include "nsIContent.h"
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#include "FrameLayerBuilder.h"
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#include "mozilla/dom/Selection.h"
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#include "nsIURIMutator.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 "nsCSSFrameConstructor.h"
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#include "nsRange.h"
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#include "nsError.h"
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#include "nsBidiUtils.h"
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#include "nsBidiPresUtils.h"
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#include "gfxRect.h"
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#include "ImageLayers.h"
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#include "ImageContainer.h"
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#include "mozilla/ServoStyleSet.h"
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#include "nsBlockFrame.h"
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#include "nsStyleStructInlines.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/Link.h"
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#include "SVGImageContext.h"
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#include "mozilla/dom/HTMLAnchorElement.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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using namespace mozilla::image;
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using namespace mozilla::layers;
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using mozilla::layout::TextDrawTarget;
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// sizes (pixels) for image icon, padding and border frame
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#define ICON_SIZE (16)
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#define ICON_PADDING (3)
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#define ALT_BORDER_WIDTH (1)
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// Default alignment value (so we can tell an unset value from a set value)
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#define ALIGN_UNSET uint8_t(-1)
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// static icon information
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StaticRefPtr<nsImageFrame::IconLoad> nsImageFrame::gIconLoad;
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// cached IO service for loading icons
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nsIIOService* nsImageFrame::sIOService;
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// test if the width and height are fixed, looking at the style data
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// This is used by nsImageFrame::ShouldCreateImageFrameFor and should
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// not be used for layout decisions.
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static bool HaveSpecifiedSize(const nsStylePosition* aStylePosition) {
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// check the width and height values in the reflow input's style struct
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// - if width and height are specified as either coord or percentage, then
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// the size of the image frame is constrained
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return aStylePosition->mWidth.IsLengthPercentage() &&
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aStylePosition->mHeight.IsLengthPercentage();
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}
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template <typename SizeOrMaxSize>
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static bool DependsOnIntrinsicSize(const SizeOrMaxSize& aMinOrMaxSize) {
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if (!aMinOrMaxSize.IsExtremumLength()) {
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return false;
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}
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auto keyword = aMinOrMaxSize.AsExtremumLength();
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switch (keyword) {
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case StyleExtremumLength::MinContent:
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case StyleExtremumLength::MaxContent:
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case StyleExtremumLength::MozFitContent:
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return true;
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case StyleExtremumLength::MozAvailable:
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return false;
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}
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MOZ_ASSERT_UNREACHABLE("Unknown sizing keyword?");
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return false;
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}
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// Decide whether we can optimize away reflows that result from the
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// image's intrinsic size changing.
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static bool SizeDependsOnIntrinsicSize(const ReflowInput& aReflowInput) {
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const auto& position = *aReflowInput.mStylePosition;
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WritingMode wm = aReflowInput.GetWritingMode();
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// Don't try to make this optimization when an image has percentages
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// in its 'width' or 'height'. The percentages might be treated like
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// auto (especially for intrinsic width calculations and for heights).
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//
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// min-width: min-content and such can also affect our intrinsic size.
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// but note that those keywords on the block axis behave like auto, so we
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// don't need to check them.
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return !position.mHeight.ConvertsToLength() ||
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!position.mWidth.ConvertsToLength() ||
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DependsOnIntrinsicSize(position.MinISize(wm)) ||
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DependsOnIntrinsicSize(position.MaxISize(wm));
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}
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nsIFrame* NS_NewImageFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
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return new (aPresShell) nsImageFrame(aStyle, aPresShell->GetPresContext(),
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nsImageFrame::Kind::ImageElement);
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}
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nsIFrame* NS_NewImageFrameForContentProperty(PresShell* aPresShell,
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ComputedStyle* aStyle) {
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return new (aPresShell) nsImageFrame(aStyle, aPresShell->GetPresContext(),
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nsImageFrame::Kind::ContentProperty);
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}
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nsIFrame* NS_NewImageFrameForGeneratedContentIndex(PresShell* aPresShell,
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ComputedStyle* aStyle) {
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return new (aPresShell)
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nsImageFrame(aStyle, aPresShell->GetPresContext(),
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nsImageFrame::Kind::ContentPropertyAtIndex);
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}
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bool nsImageFrame::ShouldShowBrokenImageIcon() const {
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// NOTE(emilio, https://github.com/w3c/csswg-drafts/issues/2832): WebKit and
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// Blink behave differently here for content: url(..), for now adapt to
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// Blink's behavior.
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if (mKind != Kind::ImageElement) {
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return false;
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}
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// check for broken images. valid null images (eg. img src="") are
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// not considered broken because they have no image requests
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if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
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uint32_t imageStatus;
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return NS_SUCCEEDED(currentRequest->GetImageStatus(&imageStatus)) &&
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(imageStatus & imgIRequest::STATUS_ERROR);
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}
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nsCOMPtr<nsIImageLoadingContent> loader = do_QueryInterface(mContent);
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MOZ_ASSERT(loader);
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return loader->GetImageBlockingStatus() != nsIContentPolicy::ACCEPT;
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}
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nsImageFrame* nsImageFrame::CreateContinuingFrame(
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mozilla::PresShell* aPresShell, ComputedStyle* aStyle) const {
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return new (aPresShell)
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nsImageFrame(aStyle, aPresShell->GetPresContext(), mKind);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsImageFrame)
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nsImageFrame::nsImageFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
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ClassID aID, Kind aKind)
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: nsAtomicContainerFrame(aStyle, aPresContext, aID),
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mComputedSize(0, 0),
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mIntrinsicSize(0, 0),
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mIntrinsicRatio(0, 0),
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mKind(aKind),
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mContentURLRequestRegistered(false),
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mDisplayingIcon(false),
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mFirstFrameComplete(false),
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mReflowCallbackPosted(false),
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mForceSyncDecoding(false) {
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EnableVisibilityTracking();
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}
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nsImageFrame::~nsImageFrame() {}
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NS_QUERYFRAME_HEAD(nsImageFrame)
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NS_QUERYFRAME_ENTRY(nsImageFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsAtomicContainerFrame)
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#ifdef ACCESSIBILITY
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a11y::AccType nsImageFrame::AccessibleType() {
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// Don't use GetImageMap() to avoid reentrancy into accessibility.
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if (HasImageMap()) {
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return a11y::eHTMLImageMapType;
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}
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return a11y::eImageType;
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}
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#endif
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void nsImageFrame::DisconnectMap() {
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if (!mImageMap) {
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return;
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}
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mImageMap->Destroy();
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mImageMap = nullptr;
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#ifdef ACCESSIBILITY
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if (nsAccessibilityService* accService = GetAccService()) {
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accService->RecreateAccessible(PresShell(), mContent);
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}
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#endif
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}
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void nsImageFrame::DestroyFrom(nsIFrame* aDestructRoot,
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PostDestroyData& aPostDestroyData) {
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if (mReflowCallbackPosted) {
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PresShell()->CancelReflowCallback(this);
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mReflowCallbackPosted = false;
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}
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// Tell our image map, if there is one, to clean up
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// This causes the nsImageMap to unregister itself as
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// a DOM listener.
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DisconnectMap();
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MOZ_ASSERT(mListener);
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if (mKind == Kind::ImageElement) {
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MOZ_ASSERT(!mContentURLRequest);
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MOZ_ASSERT(!mContentURLRequestRegistered);
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
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MOZ_ASSERT(imageLoader);
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// Notify our image loading content that we are going away so it can
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// deregister with our refresh driver.
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imageLoader->FrameDestroyed(this);
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imageLoader->RemoveNativeObserver(mListener);
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} else {
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if (mContentURLRequest) {
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nsLayoutUtils::DeregisterImageRequest(PresContext(), mContentURLRequest,
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&mContentURLRequestRegistered);
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mContentURLRequest->Cancel(NS_BINDING_ABORTED);
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}
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}
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// set the frame to null so we don't send messages to a dead object.
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mListener->SetFrame(nullptr);
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mListener = nullptr;
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// If we were displaying an icon, take ourselves off the list
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if (mDisplayingIcon) gIconLoad->RemoveIconObserver(this);
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nsAtomicContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
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}
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void nsImageFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
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nsAtomicContainerFrame::DidSetComputedStyle(aOldComputedStyle);
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if (!mImage) {
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// We'll pick this change up whenever we do get an image.
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return;
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}
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auto newOrientation = StyleVisibility()->mImageOrientation;
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// We need to update our orientation either if we had no ComputedStyle before
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// because this is the first time it's been set, or if the image-orientation
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// property changed from its previous value.
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bool shouldUpdateOrientation =
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!aOldComputedStyle ||
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aOldComputedStyle->StyleVisibility()->mImageOrientation != newOrientation;
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if (shouldUpdateOrientation) {
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nsCOMPtr<imgIContainer> image(mImage->Unwrap());
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mImage = nsLayoutUtils::OrientImage(image, newOrientation);
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UpdateIntrinsicSize(mImage);
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UpdateIntrinsicRatio(mImage);
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}
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}
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static bool SizeIsAvailable(imgIRequest* aRequest) {
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if (!aRequest) {
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return false;
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}
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uint32_t imageStatus = 0;
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nsresult rv = aRequest->GetImageStatus(&imageStatus);
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return NS_SUCCEEDED(rv) && (imageStatus & imgIRequest::STATUS_SIZE_AVAILABLE);
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}
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void nsImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) {
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MOZ_ASSERT_IF(aPrevInFlow,
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aPrevInFlow->Type() == Type() &&
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static_cast<nsImageFrame*>(aPrevInFlow)->mKind == mKind);
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nsAtomicContainerFrame::Init(aContent, aParent, aPrevInFlow);
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mListener = new nsImageListener(this);
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if (!gIconLoad) LoadIcons(PresContext());
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if (mKind == Kind::ImageElement) {
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aContent);
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MOZ_ASSERT(imageLoader);
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imageLoader->AddNativeObserver(mListener);
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// We have a PresContext now, so we need to notify the image content node
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// that it can register images.
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imageLoader->FrameCreated(this);
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} else {
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uint32_t contentIndex = 0;
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const nsStyleContent* styleContent = StyleContent();
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if (mKind == Kind::ContentPropertyAtIndex) {
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MOZ_RELEASE_ASSERT(
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aParent->GetContent()->IsGeneratedContentContainerForMarker() ||
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aParent->GetContent()->IsGeneratedContentContainerForAfter() ||
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aParent->GetContent()->IsGeneratedContentContainerForBefore());
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MOZ_RELEASE_ASSERT(
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aContent->IsHTMLElement(nsGkAtoms::mozgeneratedcontentimage));
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nsIFrame* nonAnonymousParent = aParent;
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while (nonAnonymousParent->Style()->IsAnonBox()) {
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nonAnonymousParent = nonAnonymousParent->GetParent();
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}
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MOZ_RELEASE_ASSERT(aParent->GetContent() ==
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nonAnonymousParent->GetContent());
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styleContent = nonAnonymousParent->StyleContent();
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contentIndex = static_cast<GeneratedImageContent*>(aContent)->Index();
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}
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MOZ_RELEASE_ASSERT(contentIndex < styleContent->ContentCount());
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MOZ_RELEASE_ASSERT(styleContent->ContentAt(contentIndex).GetType() ==
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StyleContentType::Image);
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if (auto* proxy = styleContent->ContentAt(contentIndex).GetImage()) {
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proxy->Clone(mListener, mContent->OwnerDoc(),
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getter_AddRefs(mContentURLRequest));
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SetupForContentURLRequest();
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}
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}
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// Give image loads associated with an image frame a small priority boost.
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if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
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uint32_t categoryToBoostPriority = imgIRequest::CATEGORY_FRAME_INIT;
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// Increase load priority further if intrinsic size might be important for
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// layout.
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if (!HaveSpecifiedSize(StylePosition())) {
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categoryToBoostPriority |= imgIRequest::CATEGORY_SIZE_QUERY;
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}
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currentRequest->BoostPriority(categoryToBoostPriority);
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}
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}
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void nsImageFrame::SetupForContentURLRequest() {
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MOZ_ASSERT(mKind != Kind::ImageElement);
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if (!mContentURLRequest) {
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return;
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}
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uint32_t status = 0;
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nsresult rv = mContentURLRequest->GetImageStatus(&status);
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if (NS_FAILED(rv)) {
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return;
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}
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if (status & imgIRequest::STATUS_SIZE_AVAILABLE) {
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nsCOMPtr<imgIContainer> image;
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mContentURLRequest->GetImage(getter_AddRefs(image));
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OnSizeAvailable(mContentURLRequest, image);
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}
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if (status & imgIRequest::STATUS_FRAME_COMPLETE) {
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mFirstFrameComplete = true;
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}
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if (status & imgIRequest::STATUS_IS_ANIMATED) {
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nsLayoutUtils::RegisterImageRequest(PresContext(), mContentURLRequest,
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&mContentURLRequestRegistered);
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}
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}
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static void ScaleIntrinsicSizeForDensity(nsIContent& aContent, nsSize& aSize) {
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auto* image = HTMLImageElement::FromNode(aContent);
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if (!image) {
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return;
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}
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ResponsiveImageSelector* selector = image->GetResponsiveImageSelector();
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if (!selector) {
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return;
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}
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double density = selector->GetSelectedImageDensity();
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MOZ_ASSERT(density >= 0.0);
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if (density == 1.0) {
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return;
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}
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if (aSize.width != -1) {
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aSize.width = NSToCoordRound(double(aSize.width) / density);
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}
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if (aSize.height != -1) {
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aSize.height = NSToCoordRound(double(aSize.height) / density);
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}
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}
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bool nsImageFrame::UpdateIntrinsicSize(imgIContainer* aImage) {
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MOZ_ASSERT(aImage, "null image");
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if (!aImage) return false;
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IntrinsicSize oldIntrinsicSize = mIntrinsicSize;
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mIntrinsicSize = IntrinsicSize();
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// Set intrinsic size to match aImage's reported intrinsic width & height.
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// (Unless we have 'contain:size' in which case our intrinsic size is 0,0.)
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nsSize intrinsicSize;
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if (!StyleDisplay()->IsContainSize() &&
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NS_SUCCEEDED(aImage->GetIntrinsicSize(&intrinsicSize))) {
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if (mKind == Kind::ImageElement) {
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ScaleIntrinsicSizeForDensity(*mContent, intrinsicSize);
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}
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// If the image has no intrinsic width, intrinsicSize.width will be -1, and
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// we can leave mIntrinsicSize.width at its default value of
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// eStyleUnit_None. Otherwise we use intrinsicSize.width. Height works the
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// same way.
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if (intrinsicSize.width != -1)
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mIntrinsicSize.width.emplace(intrinsicSize.width);
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if (intrinsicSize.height != -1)
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mIntrinsicSize.height.emplace(intrinsicSize.height);
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} else {
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// Either we have 'contain:size', or GetIntrinsicSize() failed,
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// which means that the image hasn't loaded enough to report a
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// result. We treat both cases as if the image's intrinsic size
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// was 0,0.
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mIntrinsicSize = IntrinsicSize(0, 0);
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}
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return mIntrinsicSize != oldIntrinsicSize;
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}
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bool nsImageFrame::UpdateIntrinsicRatio(imgIContainer* aImage) {
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MOZ_ASSERT(aImage, "null image");
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if (!aImage) return false;
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nsSize oldIntrinsicRatio = mIntrinsicRatio;
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// Set intrinsic ratio to match aImage's reported intrinsic ratio.
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// But if we have 'contain:size', or aImage hasn't loaded enough to report
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// useful ratio, we fall back to 0,0.
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if (StyleDisplay()->IsContainSize() ||
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NS_FAILED(aImage->GetIntrinsicRatio(&mIntrinsicRatio))) {
|
|
mIntrinsicRatio.SizeTo(0, 0);
|
|
}
|
|
|
|
return mIntrinsicRatio != oldIntrinsicRatio;
|
|
}
|
|
|
|
bool nsImageFrame::GetSourceToDestTransform(nsTransform2D& aTransform) {
|
|
// First, figure out destRect (the rect we're rendering into).
|
|
// NOTE: We use mComputedSize instead of just GetInnerArea()'s own size here,
|
|
// because GetInnerArea() might be smaller if we're fragmented, whereas
|
|
// mComputedSize has our full content-box size (which we need for
|
|
// ComputeObjectDestRect to work correctly).
|
|
nsRect constraintRect(GetInnerArea().TopLeft(), mComputedSize);
|
|
constraintRect.y -= GetContinuationOffset();
|
|
|
|
nsRect destRect = nsLayoutUtils::ComputeObjectDestRect(
|
|
constraintRect, mIntrinsicSize, mIntrinsicRatio, StylePosition());
|
|
// Set the translation components, based on destRect
|
|
// XXXbz does this introduce rounding errors because of the cast to
|
|
// float? Should we just manually add that stuff in every time
|
|
// instead?
|
|
aTransform.SetToTranslate(float(destRect.x), float(destRect.y));
|
|
|
|
// NOTE(emilio): This intrinsicSize is not the same as the layout intrinsic
|
|
// size (mIntrinsicSize), which can be scaled due to ResponsiveImageSelector,
|
|
// see ScaleIntrinsicSizeForDensity.
|
|
nsSize intrinsicSize;
|
|
if (!mImage || !NS_SUCCEEDED(mImage->GetIntrinsicSize(&intrinsicSize)) ||
|
|
intrinsicSize.IsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
aTransform.SetScale(float(destRect.width) / float(intrinsicSize.width),
|
|
float(destRect.height) / float(intrinsicSize.height));
|
|
return true;
|
|
}
|
|
|
|
// This function checks whether the given request is the current request for our
|
|
// mContent.
|
|
bool nsImageFrame::IsPendingLoad(imgIRequest* aRequest) const {
|
|
// Default to pending load in case of errors
|
|
if (mKind != Kind::ImageElement) {
|
|
MOZ_ASSERT(aRequest == mContentURLRequest);
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader(do_QueryInterface(mContent));
|
|
MOZ_ASSERT(imageLoader);
|
|
|
|
int32_t requestType = nsIImageLoadingContent::UNKNOWN_REQUEST;
|
|
imageLoader->GetRequestType(aRequest, &requestType);
|
|
|
|
return requestType != nsIImageLoadingContent::CURRENT_REQUEST;
|
|
}
|
|
|
|
nsRect nsImageFrame::SourceRectToDest(const nsIntRect& aRect) {
|
|
// When scaling the image, row N of the source image may (depending on
|
|
// the scaling function) be used to draw any row in the destination image
|
|
// between floor(F * (N-1)) and ceil(F * (N+1)), where F is the
|
|
// floating-point scaling factor. The same holds true for columns.
|
|
// So, we start by computing that bound without the floor and ceiling.
|
|
|
|
nsRect r(nsPresContext::CSSPixelsToAppUnits(aRect.x - 1),
|
|
nsPresContext::CSSPixelsToAppUnits(aRect.y - 1),
|
|
nsPresContext::CSSPixelsToAppUnits(aRect.width + 2),
|
|
nsPresContext::CSSPixelsToAppUnits(aRect.height + 2));
|
|
|
|
nsTransform2D sourceToDest;
|
|
if (!GetSourceToDestTransform(sourceToDest)) {
|
|
// Failed to generate transform matrix. Return our whole inner area,
|
|
// to be on the safe side (since this method is used for generating
|
|
// invalidation rects).
|
|
return GetInnerArea();
|
|
}
|
|
|
|
sourceToDest.TransformCoord(&r.x, &r.y, &r.width, &r.height);
|
|
|
|
// Now, round the edges out to the pixel boundary.
|
|
nscoord scale = nsPresContext::CSSPixelsToAppUnits(1);
|
|
nscoord right = r.x + r.width;
|
|
nscoord bottom = r.y + r.height;
|
|
|
|
r.x -= (scale + (r.x % scale)) % scale;
|
|
r.y -= (scale + (r.y % scale)) % scale;
|
|
r.width = right + ((scale - (right % scale)) % scale) - r.x;
|
|
r.height = bottom + ((scale - (bottom % scale)) % scale) - r.y;
|
|
|
|
return r;
|
|
}
|
|
|
|
// Note that we treat NS_EVENT_STATE_SUPPRESSED images as "OK". This means
|
|
// that we'll construct image frames for them as needed if their display is
|
|
// toggled from "none" (though we won't paint them, unless their visibility
|
|
// is changed too).
|
|
#define BAD_STATES (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)
|
|
|
|
static bool ImageOk(EventStates aState) {
|
|
return !aState.HasAtLeastOneOfStates(BAD_STATES);
|
|
}
|
|
|
|
static bool HasAltText(const Element& aElement) {
|
|
// We always return some alternate text for <input>, see
|
|
// nsCSSFrameConstructor::GetAlternateTextFor.
|
|
if (aElement.IsHTMLElement(nsGkAtoms::input)) {
|
|
return true;
|
|
}
|
|
|
|
MOZ_ASSERT(aElement.IsHTMLElement(nsGkAtoms::img));
|
|
nsAutoString altText;
|
|
return aElement.GetAttr(nsGkAtoms::alt, altText) && !altText.IsEmpty();
|
|
}
|
|
|
|
// Check if we want to use an image frame or just let the frame constructor make
|
|
// us into an inline.
|
|
/* static */
|
|
bool nsImageFrame::ShouldCreateImageFrameFor(const Element& aElement,
|
|
ComputedStyle& aStyle) {
|
|
if (ImageOk(aElement.State())) {
|
|
// Image is fine or loading; do the image frame thing
|
|
return true;
|
|
}
|
|
|
|
if (aStyle.StyleUIReset()->mForceBrokenImageIcon) {
|
|
return true;
|
|
}
|
|
|
|
// if our "do not show placeholders" pref is set, skip the icon
|
|
if (gIconLoad && gIconLoad->mPrefForceInlineAltText) {
|
|
return false;
|
|
}
|
|
|
|
if (!HasAltText(aElement)) {
|
|
return true;
|
|
}
|
|
|
|
if (aElement.OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks) {
|
|
// FIXME(emilio): We definitely don't reframe when this changes...
|
|
return HaveSpecifiedSize(aStyle.StylePosition());
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult nsImageFrame::Notify(imgIRequest* aRequest, int32_t aType,
|
|
const nsIntRect* aRect) {
|
|
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
aRequest->GetImage(getter_AddRefs(image));
|
|
return OnSizeAvailable(aRequest, image);
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::FRAME_UPDATE) {
|
|
return OnFrameUpdate(aRequest, aRect);
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::FRAME_COMPLETE) {
|
|
mFirstFrameComplete = true;
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::IS_ANIMATED &&
|
|
mKind != Kind::ImageElement) {
|
|
nsLayoutUtils::RegisterImageRequest(PresContext(), mContentURLRequest,
|
|
&mContentURLRequestRegistered);
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
|
|
uint32_t imgStatus;
|
|
aRequest->GetImageStatus(&imgStatus);
|
|
nsresult status =
|
|
imgStatus & imgIRequest::STATUS_ERROR ? NS_ERROR_FAILURE : NS_OK;
|
|
return OnLoadComplete(aRequest, status);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsImageFrame::OnSizeAvailable(imgIRequest* aRequest,
|
|
imgIContainer* aImage) {
|
|
if (!aImage) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
/* Get requested animation policy from the pres context:
|
|
* normal = 0
|
|
* one frame = 1
|
|
* one loop = 2
|
|
*/
|
|
aImage->SetAnimationMode(PresContext()->ImageAnimationMode());
|
|
|
|
if (IsPendingLoad(aRequest)) {
|
|
// We don't care
|
|
return NS_OK;
|
|
}
|
|
|
|
bool intrinsicSizeChanged = false;
|
|
if (SizeIsAvailable(aRequest)) {
|
|
// This is valid and for the current request, so update our stored image
|
|
// container, orienting according to our style.
|
|
mImage = nsLayoutUtils::OrientImage(aImage,
|
|
StyleVisibility()->mImageOrientation);
|
|
|
|
intrinsicSizeChanged = UpdateIntrinsicSize(mImage);
|
|
intrinsicSizeChanged = UpdateIntrinsicRatio(mImage) || intrinsicSizeChanged;
|
|
} else {
|
|
// We no longer have a valid image, so release our stored image container.
|
|
mImage = mPrevImage = nullptr;
|
|
|
|
// Have to size to 0,0 so that GetDesiredSize recalculates the size.
|
|
mIntrinsicSize = IntrinsicSize(0, 0);
|
|
mIntrinsicRatio.SizeTo(0, 0);
|
|
intrinsicSizeChanged = true;
|
|
}
|
|
|
|
if (!GotInitialReflow()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MarkNeedsDisplayItemRebuild();
|
|
|
|
if (intrinsicSizeChanged) {
|
|
// Now we need to reflow if we have an unconstrained size and have
|
|
// already gotten the initial reflow
|
|
if (!(mState & IMAGE_SIZECONSTRAINED)) {
|
|
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
} else {
|
|
// We've already gotten the initial reflow, and our size hasn't changed,
|
|
// so we're ready to request a decode.
|
|
MaybeDecodeForPredictedSize();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsImageFrame::OnFrameUpdate(imgIRequest* aRequest,
|
|
const nsIntRect* aRect) {
|
|
NS_ENSURE_ARG_POINTER(aRect);
|
|
|
|
if (!GotInitialReflow()) {
|
|
// Don't bother to do anything; we have a reflow coming up!
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mFirstFrameComplete && !StyleVisibility()->IsVisible()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (IsPendingLoad(aRequest)) {
|
|
// We don't care
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIntRect layerInvalidRect =
|
|
mImage ? mImage->GetImageSpaceInvalidationRect(*aRect) : *aRect;
|
|
|
|
if (layerInvalidRect.IsEqualInterior(GetMaxSizedIntRect())) {
|
|
// Invalidate our entire area.
|
|
InvalidateSelf(nullptr, nullptr);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsRect frameInvalidRect = SourceRectToDest(layerInvalidRect);
|
|
InvalidateSelf(&layerInvalidRect, &frameInvalidRect);
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsImageFrame::InvalidateSelf(const nsIntRect* aLayerInvalidRect,
|
|
const nsRect* aFrameInvalidRect) {
|
|
// Check if WebRender has interacted with this frame. If it has
|
|
// we need to let it know that things have changed.
|
|
const auto type = DisplayItemType::TYPE_IMAGE;
|
|
const auto producerId =
|
|
mImage ? mImage->GetProducerId() : kContainerProducerID_Invalid;
|
|
if (WebRenderUserData::ProcessInvalidateForImage(this, type, producerId)) {
|
|
return;
|
|
}
|
|
|
|
InvalidateLayer(type, aLayerInvalidRect, aFrameInvalidRect);
|
|
|
|
if (!mFirstFrameComplete) {
|
|
InvalidateLayer(DisplayItemType::TYPE_ALT_FEEDBACK, aLayerInvalidRect,
|
|
aFrameInvalidRect);
|
|
}
|
|
}
|
|
|
|
nsresult nsImageFrame::OnLoadComplete(imgIRequest* aRequest, nsresult aStatus) {
|
|
NotifyNewCurrentRequest(aRequest, aStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsImageFrame::ResponsiveContentDensityChanged() {
|
|
if (!GotInitialReflow()) {
|
|
return;
|
|
}
|
|
|
|
if (!mImage) {
|
|
return;
|
|
}
|
|
|
|
if (!UpdateIntrinsicSize(mImage) && !UpdateIntrinsicRatio(mImage)) {
|
|
return;
|
|
}
|
|
|
|
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
|
|
void nsImageFrame::NotifyNewCurrentRequest(imgIRequest* aRequest,
|
|
nsresult aStatus) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
aRequest->GetImage(getter_AddRefs(image));
|
|
NS_ASSERTION(image || NS_FAILED(aStatus),
|
|
"Successful load with no container?");
|
|
|
|
// May have to switch sizes here!
|
|
bool intrinsicSizeChanged = true;
|
|
if (NS_SUCCEEDED(aStatus) && image && SizeIsAvailable(aRequest)) {
|
|
// Update our stored image container, orienting according to our style.
|
|
mImage =
|
|
nsLayoutUtils::OrientImage(image, StyleVisibility()->mImageOrientation);
|
|
|
|
intrinsicSizeChanged = UpdateIntrinsicSize(mImage);
|
|
intrinsicSizeChanged = UpdateIntrinsicRatio(mImage) || intrinsicSizeChanged;
|
|
} else {
|
|
// We no longer have a valid image, so release our stored image container.
|
|
mImage = mPrevImage = nullptr;
|
|
|
|
// Have to size to 0,0 so that GetDesiredSize recalculates the size
|
|
mIntrinsicSize = IntrinsicSize(0, 0);
|
|
mIntrinsicRatio.SizeTo(0, 0);
|
|
}
|
|
|
|
if (GotInitialReflow()) {
|
|
if (intrinsicSizeChanged) {
|
|
if (!(mState & IMAGE_SIZECONSTRAINED)) {
|
|
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
} else {
|
|
// We've already gotten the initial reflow, and our size hasn't changed,
|
|
// so we're ready to request a decode.
|
|
MaybeDecodeForPredictedSize();
|
|
}
|
|
}
|
|
// Update border+content to account for image change
|
|
InvalidateFrame();
|
|
}
|
|
}
|
|
|
|
void nsImageFrame::MaybeDecodeForPredictedSize() {
|
|
// Check that we're ready to decode.
|
|
if (!mImage) {
|
|
return; // Nothing to do yet.
|
|
}
|
|
|
|
if (mComputedSize.IsEmpty()) {
|
|
return; // We won't draw anything, so no point in decoding.
|
|
}
|
|
|
|
if (GetVisibility() != Visibility::ApproximatelyVisible) {
|
|
return; // We're not visible, so don't decode.
|
|
}
|
|
|
|
// OK, we're ready to decode. Compute the scale to the screen...
|
|
mozilla::PresShell* presShell = PresContext()->PresShell();
|
|
LayoutDeviceToScreenScale2D resolutionToScreen(
|
|
presShell->GetCumulativeResolution() *
|
|
nsLayoutUtils::GetTransformToAncestorScaleExcludingAnimated(this));
|
|
|
|
// ...and this frame's content box...
|
|
const nsPoint offset =
|
|
GetOffsetToCrossDoc(nsLayoutUtils::GetReferenceFrame(this));
|
|
const nsRect frameContentBox = GetInnerArea() + offset;
|
|
|
|
// ...and our predicted dest rect...
|
|
const int32_t factor = PresContext()->AppUnitsPerDevPixel();
|
|
const LayoutDeviceRect destRect = LayoutDeviceRect::FromAppUnits(
|
|
PredictedDestRect(frameContentBox), factor);
|
|
|
|
// ...and use them to compute our predicted size in screen pixels.
|
|
const ScreenSize predictedScreenSize = destRect.Size() * resolutionToScreen;
|
|
const ScreenIntSize predictedScreenIntSize =
|
|
RoundedToInt(predictedScreenSize);
|
|
if (predictedScreenIntSize.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Determine the optimal image size to use.
|
|
uint32_t flags = imgIContainer::FLAG_HIGH_QUALITY_SCALING |
|
|
imgIContainer::FLAG_ASYNC_NOTIFY;
|
|
SamplingFilter samplingFilter =
|
|
nsLayoutUtils::GetSamplingFilterForFrame(this);
|
|
gfxSize gfxPredictedScreenSize =
|
|
gfxSize(predictedScreenIntSize.width, predictedScreenIntSize.height);
|
|
nsIntSize predictedImageSize = mImage->OptimalImageSizeForDest(
|
|
gfxPredictedScreenSize, imgIContainer::FRAME_CURRENT, samplingFilter,
|
|
flags);
|
|
|
|
// Request a decode.
|
|
mImage->RequestDecodeForSize(predictedImageSize, flags);
|
|
}
|
|
|
|
nsRect nsImageFrame::PredictedDestRect(const nsRect& aFrameContentBox) {
|
|
// Note: To get the "dest rect", we have to provide the "constraint rect"
|
|
// (which is the content-box, with the effects of fragmentation undone).
|
|
nsRect constraintRect(aFrameContentBox.TopLeft(), mComputedSize);
|
|
constraintRect.y -= GetContinuationOffset();
|
|
|
|
return nsLayoutUtils::ComputeObjectDestRect(constraintRect, mIntrinsicSize,
|
|
mIntrinsicRatio, StylePosition());
|
|
}
|
|
|
|
void nsImageFrame::EnsureIntrinsicSizeAndRatio() {
|
|
if (StyleDisplay()->IsContainSize()) {
|
|
// If we have 'contain:size', then our intrinsic size and ratio are 0,0
|
|
// regardless of what our underlying image may think.
|
|
mIntrinsicSize = IntrinsicSize(0, 0);
|
|
mIntrinsicRatio.SizeTo(0, 0);
|
|
return;
|
|
}
|
|
|
|
// If mIntrinsicSize.width and height are 0, then we need to update from the
|
|
// image container.
|
|
if (mIntrinsicSize != IntrinsicSize(0, 0)) {
|
|
return;
|
|
}
|
|
|
|
if (mImage) {
|
|
UpdateIntrinsicSize(mImage);
|
|
UpdateIntrinsicRatio(mImage);
|
|
return;
|
|
}
|
|
|
|
// invalid image specified. make the image big enough for the "broken" icon
|
|
if (ShouldShowBrokenImageIcon()) {
|
|
nscoord edgeLengthToUse = nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
|
|
mIntrinsicSize = IntrinsicSize(edgeLengthToUse, edgeLengthToUse);
|
|
mIntrinsicRatio.SizeTo(1, 1);
|
|
}
|
|
}
|
|
|
|
/* virtual */
|
|
LogicalSize nsImageFrame::ComputeSize(
|
|
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
|
|
nscoord aAvailableISize, const LogicalSize& aMargin,
|
|
const LogicalSize& aBorder, const LogicalSize& aPadding,
|
|
ComputeSizeFlags aFlags) {
|
|
EnsureIntrinsicSizeAndRatio();
|
|
return ComputeSizeWithIntrinsicDimensions(
|
|
aRenderingContext, aWM, mIntrinsicSize, mIntrinsicRatio, aCBSize, aMargin,
|
|
aBorder, aPadding, aFlags);
|
|
}
|
|
|
|
// XXXdholbert This function's clients should probably just be calling
|
|
// GetContentRectRelativeToSelf() directly.
|
|
nsRect nsImageFrame::GetInnerArea() const {
|
|
return GetContentRectRelativeToSelf();
|
|
}
|
|
|
|
Element* nsImageFrame::GetMapElement() const {
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
return imageLoader ? static_cast<nsImageLoadingContent*>(imageLoader.get())
|
|
->FindImageMap()
|
|
: nullptr;
|
|
}
|
|
|
|
// get the offset into the content area of the image where aImg starts if it is
|
|
// a continuation.
|
|
nscoord nsImageFrame::GetContinuationOffset() const {
|
|
nscoord offset = 0;
|
|
for (nsIFrame* f = GetPrevInFlow(); f; f = f->GetPrevInFlow()) {
|
|
offset += f->GetContentRect().height;
|
|
}
|
|
NS_ASSERTION(offset >= 0, "bogus GetContentRect");
|
|
return offset;
|
|
}
|
|
|
|
/* virtual */
|
|
nscoord nsImageFrame::GetMinISize(gfxContext* aRenderingContext) {
|
|
// XXX The caller doesn't account for constraints of the block-size,
|
|
// min-block-size, and max-block-size properties.
|
|
DebugOnly<nscoord> result;
|
|
DISPLAY_MIN_INLINE_SIZE(this, result);
|
|
EnsureIntrinsicSizeAndRatio();
|
|
const auto& iSize = GetWritingMode().IsVertical() ? mIntrinsicSize.height
|
|
: mIntrinsicSize.width;
|
|
return iSize.valueOr(0);
|
|
}
|
|
|
|
/* virtual */
|
|
nscoord nsImageFrame::GetPrefISize(gfxContext* aRenderingContext) {
|
|
// XXX The caller doesn't account for constraints of the block-size,
|
|
// min-block-size, and max-block-size properties.
|
|
DebugOnly<nscoord> result;
|
|
DISPLAY_PREF_INLINE_SIZE(this, result);
|
|
EnsureIntrinsicSizeAndRatio();
|
|
const auto& iSize = GetWritingMode().IsVertical() ? mIntrinsicSize.height
|
|
: mIntrinsicSize.width;
|
|
// convert from normal twips to scaled twips (printing...)
|
|
return iSize.valueOr(0);
|
|
}
|
|
|
|
/* virtual */
|
|
IntrinsicSize nsImageFrame::GetIntrinsicSize() { return mIntrinsicSize; }
|
|
|
|
/* virtual */
|
|
nsSize nsImageFrame::GetIntrinsicRatio() { return mIntrinsicRatio; }
|
|
|
|
void nsImageFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
|
|
const ReflowInput& aReflowInput,
|
|
nsReflowStatus& aStatus) {
|
|
MarkInReflow();
|
|
DO_GLOBAL_REFLOW_COUNT("nsImageFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
|
|
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
|
|
NS_FRAME_TRACE(
|
|
NS_FRAME_TRACE_CALLS,
|
|
("enter nsImageFrame::Reflow: availSize=%d,%d",
|
|
aReflowInput.AvailableWidth(), aReflowInput.AvailableHeight()));
|
|
|
|
MOZ_ASSERT(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
|
|
|
|
// see if we have a frozen size (i.e. a fixed width and height)
|
|
if (!SizeDependsOnIntrinsicSize(aReflowInput)) {
|
|
AddStateBits(IMAGE_SIZECONSTRAINED);
|
|
} else {
|
|
RemoveStateBits(IMAGE_SIZECONSTRAINED);
|
|
}
|
|
|
|
mComputedSize =
|
|
nsSize(aReflowInput.ComputedWidth(), aReflowInput.ComputedHeight());
|
|
|
|
aMetrics.Width() = mComputedSize.width;
|
|
aMetrics.Height() = mComputedSize.height;
|
|
|
|
// add borders and padding
|
|
aMetrics.Width() += aReflowInput.ComputedPhysicalBorderPadding().LeftRight();
|
|
aMetrics.Height() += aReflowInput.ComputedPhysicalBorderPadding().TopBottom();
|
|
|
|
if (GetPrevInFlow()) {
|
|
aMetrics.Width() = GetPrevInFlow()->GetSize().width;
|
|
nscoord y = GetContinuationOffset();
|
|
aMetrics.Height() -= y + aReflowInput.ComputedPhysicalBorderPadding().top;
|
|
aMetrics.Height() = std::max(0, aMetrics.Height());
|
|
}
|
|
|
|
// we have to split images if we are:
|
|
// in Paginated mode, we need to have a constrained height, and have a height
|
|
// larger than our available height
|
|
uint32_t loadStatus = imgIRequest::STATUS_NONE;
|
|
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
|
|
currentRequest->GetImageStatus(&loadStatus);
|
|
}
|
|
|
|
if (aPresContext->IsPaginated() &&
|
|
((loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) ||
|
|
(mState & IMAGE_SIZECONSTRAINED)) &&
|
|
NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableHeight() &&
|
|
aMetrics.Height() > aReflowInput.AvailableHeight()) {
|
|
// our desired height was greater than 0, so to avoid infinite
|
|
// splitting, use 1 pixel as the min
|
|
aMetrics.Height() = std::max(nsPresContext::CSSPixelsToAppUnits(1),
|
|
aReflowInput.AvailableHeight());
|
|
aStatus.SetIncomplete();
|
|
}
|
|
|
|
aMetrics.SetOverflowAreasToDesiredBounds();
|
|
bool imageOK = ImageOk(mContent->AsElement()->State());
|
|
|
|
// Determine if the size is available
|
|
bool haveSize = false;
|
|
if (loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) {
|
|
haveSize = true;
|
|
}
|
|
|
|
if (!imageOK || !haveSize) {
|
|
nsRect altFeedbackSize(
|
|
0, 0,
|
|
nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + 2 * (ICON_PADDING + ALT_BORDER_WIDTH)),
|
|
nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + 2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
|
|
// We include the altFeedbackSize in our visual overflow, but not in our
|
|
// scrollable overflow, since it doesn't really need to be scrolled to
|
|
// outside the image.
|
|
static_assert(eOverflowType_LENGTH == 2, "Unknown overflow types?");
|
|
nsRect& visualOverflow = aMetrics.VisualOverflow();
|
|
visualOverflow.UnionRect(visualOverflow, altFeedbackSize);
|
|
} else {
|
|
// We've just reflowed and we should have an accurate size, so we're ready
|
|
// to request a decode.
|
|
MaybeDecodeForPredictedSize();
|
|
}
|
|
FinishAndStoreOverflow(&aMetrics, aReflowInput.mStyleDisplay);
|
|
|
|
if ((GetStateBits() & NS_FRAME_FIRST_REFLOW) && !mReflowCallbackPosted) {
|
|
mReflowCallbackPosted = true;
|
|
PresShell()->PostReflowCallback(this);
|
|
}
|
|
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("exit nsImageFrame::Reflow: size=%d,%d",
|
|
aMetrics.Width(), aMetrics.Height()));
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
|
|
}
|
|
|
|
bool nsImageFrame::ReflowFinished() {
|
|
mReflowCallbackPosted = false;
|
|
|
|
// XXX(seth): We don't need this. The purpose of updating visibility
|
|
// synchronously is to ensure that animated images start animating
|
|
// immediately. In the short term, however,
|
|
// nsImageLoadingContent::OnUnlockedDraw() is enough to ensure that
|
|
// animations start as soon as the image is painted for the first time, and in
|
|
// the long term we want to update visibility information from the display
|
|
// list whenever we paint, so we don't actually need to do this. However, to
|
|
// avoid behavior changes during the transition from the old image visibility
|
|
// code, we'll leave it in for now.
|
|
UpdateVisibilitySynchronously();
|
|
|
|
return false;
|
|
}
|
|
|
|
void nsImageFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
|
|
|
|
// Computes the width of the specified string. aMaxWidth specifies the maximum
|
|
// width available. Once this limit is reached no more characters are measured.
|
|
// The number of characters that fit within the maximum width are returned in
|
|
// aMaxFit. NOTE: it is assumed that the fontmetrics have already been selected
|
|
// into the rendering context before this is called (for performance). MMP
|
|
nscoord nsImageFrame::MeasureString(const char16_t* aString, int32_t aLength,
|
|
nscoord aMaxWidth, uint32_t& aMaxFit,
|
|
gfxContext& aContext,
|
|
nsFontMetrics& aFontMetrics) {
|
|
nscoord totalWidth = 0;
|
|
aFontMetrics.SetTextRunRTL(false);
|
|
nscoord spaceWidth = aFontMetrics.SpaceWidth();
|
|
|
|
aMaxFit = 0;
|
|
while (aLength > 0) {
|
|
// Find the next place we can line break
|
|
uint32_t len = aLength;
|
|
bool trailingSpace = false;
|
|
for (int32_t i = 0; i < aLength; i++) {
|
|
if (dom::IsSpaceCharacter(aString[i]) && (i > 0)) {
|
|
len = i; // don't include the space when measuring
|
|
trailingSpace = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Measure this chunk of text, and see if it fits
|
|
nscoord width = nsLayoutUtils::AppUnitWidthOfStringBidi(
|
|
aString, len, this, aFontMetrics, aContext);
|
|
bool fits = (totalWidth + width) <= aMaxWidth;
|
|
|
|
// If it fits on the line, or it's the first word we've processed then
|
|
// include it
|
|
if (fits || (0 == totalWidth)) {
|
|
// New piece fits
|
|
totalWidth += width;
|
|
|
|
// If there's a trailing space then see if it fits as well
|
|
if (trailingSpace) {
|
|
if ((totalWidth + spaceWidth) <= aMaxWidth) {
|
|
totalWidth += spaceWidth;
|
|
} else {
|
|
// Space won't fit. Leave it at the end but don't include it in
|
|
// the width
|
|
fits = false;
|
|
}
|
|
|
|
len++;
|
|
}
|
|
|
|
aMaxFit += len;
|
|
aString += len;
|
|
aLength -= len;
|
|
}
|
|
|
|
if (!fits) {
|
|
break;
|
|
}
|
|
}
|
|
return totalWidth;
|
|
}
|
|
|
|
// Formats the alt-text to fit within the specified rectangle. Breaks lines
|
|
// between words if a word would extend past the edge of the rectangle
|
|
void nsImageFrame::DisplayAltText(nsPresContext* aPresContext,
|
|
gfxContext& aRenderingContext,
|
|
const nsString& aAltText,
|
|
const nsRect& aRect) {
|
|
// Set font and color
|
|
aRenderingContext.SetColor(Color::FromABGR(StyleColor()->mColor.ToColor()));
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
|
|
|
|
// Format the text to display within the formatting rect
|
|
|
|
nscoord maxAscent = fm->MaxAscent();
|
|
nscoord maxDescent = fm->MaxDescent();
|
|
nscoord lineHeight = fm->MaxHeight(); // line-relative, so an x-coordinate
|
|
// length if writing mode is vertical
|
|
|
|
WritingMode wm = GetWritingMode();
|
|
bool isVertical = wm.IsVertical();
|
|
|
|
fm->SetVertical(isVertical);
|
|
fm->SetTextOrientation(StyleVisibility()->mTextOrientation);
|
|
|
|
// XXX It would be nice if there was a way to have the font metrics tell
|
|
// use where to break the text given a maximum width. At a minimum we need
|
|
// to be able to get the break character...
|
|
const char16_t* str = aAltText.get();
|
|
int32_t strLen = aAltText.Length();
|
|
nsPoint pt = wm.IsVerticalRL() ? aRect.TopRight() - nsPoint(lineHeight, 0)
|
|
: aRect.TopLeft();
|
|
nscoord iSize = isVertical ? aRect.height : aRect.width;
|
|
|
|
if (!aPresContext->BidiEnabled() && HasRTLChars(aAltText)) {
|
|
aPresContext->SetBidiEnabled();
|
|
}
|
|
|
|
// Always show the first line, even if we have to clip it below
|
|
bool firstLine = true;
|
|
while (strLen > 0) {
|
|
if (!firstLine) {
|
|
// If we've run out of space, break out of the loop
|
|
if ((!isVertical && (pt.y + maxDescent) >= aRect.YMost()) ||
|
|
(wm.IsVerticalRL() && (pt.x + maxDescent < aRect.x)) ||
|
|
(wm.IsVerticalLR() && (pt.x + maxDescent >= aRect.XMost()))) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Determine how much of the text to display on this line
|
|
uint32_t maxFit; // number of characters that fit
|
|
nscoord strWidth =
|
|
MeasureString(str, strLen, iSize, maxFit, aRenderingContext, *fm);
|
|
|
|
// Display the text
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
|
|
if (aPresContext->BidiEnabled()) {
|
|
nsBidiDirection dir;
|
|
nscoord x, y;
|
|
|
|
if (isVertical) {
|
|
x = pt.x + maxDescent;
|
|
if (wm.IsBidiLTR()) {
|
|
y = aRect.y;
|
|
dir = NSBIDI_LTR;
|
|
} else {
|
|
y = aRect.YMost() - strWidth;
|
|
dir = NSBIDI_RTL;
|
|
}
|
|
} else {
|
|
y = pt.y + maxAscent;
|
|
if (wm.IsBidiLTR()) {
|
|
x = aRect.x;
|
|
dir = NSBIDI_LTR;
|
|
} else {
|
|
x = aRect.XMost() - strWidth;
|
|
dir = NSBIDI_RTL;
|
|
}
|
|
}
|
|
|
|
rv = nsBidiPresUtils::RenderText(
|
|
str, maxFit, dir, aPresContext, aRenderingContext,
|
|
aRenderingContext.GetDrawTarget(), *fm, x, y);
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
nsLayoutUtils::DrawUniDirString(str, maxFit,
|
|
isVertical
|
|
? nsPoint(pt.x + maxDescent, pt.y)
|
|
: nsPoint(pt.x, pt.y + maxAscent),
|
|
*fm, aRenderingContext);
|
|
}
|
|
|
|
// Move to the next line
|
|
str += maxFit;
|
|
strLen -= maxFit;
|
|
if (wm.IsVerticalRL()) {
|
|
pt.x -= lineHeight;
|
|
} else if (wm.IsVerticalLR()) {
|
|
pt.x += lineHeight;
|
|
} else {
|
|
pt.y += lineHeight;
|
|
}
|
|
|
|
firstLine = false;
|
|
}
|
|
}
|
|
|
|
struct nsRecessedBorder : public nsStyleBorder {
|
|
nsRecessedBorder(nscoord aBorderWidth, nsPresContext* aPresContext)
|
|
: nsStyleBorder(*aPresContext->Document()) {
|
|
NS_FOR_CSS_SIDES(side) {
|
|
BorderColorFor(side) = StyleColor::Black();
|
|
mBorder.Side(side) = aBorderWidth;
|
|
// Note: use SetBorderStyle here because we want to affect
|
|
// mComputedBorder
|
|
SetBorderStyle(side, StyleBorderStyle::Inset);
|
|
}
|
|
}
|
|
};
|
|
|
|
class nsDisplayAltFeedback final : public nsDisplayItem {
|
|
public:
|
|
nsDisplayAltFeedback(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
|
|
: nsDisplayItem(aBuilder, aFrame) {}
|
|
|
|
virtual nsDisplayItemGeometry* AllocateGeometry(
|
|
nsDisplayListBuilder* aBuilder) override {
|
|
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
|
|
}
|
|
|
|
virtual void ComputeInvalidationRegion(
|
|
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
|
|
nsRegion* aInvalidRegion) const override {
|
|
auto geometry =
|
|
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
|
|
|
|
if (aBuilder->ShouldSyncDecodeImages() &&
|
|
geometry->ShouldInvalidateToSyncDecodeImages()) {
|
|
bool snap;
|
|
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
|
|
}
|
|
|
|
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry,
|
|
aInvalidRegion);
|
|
}
|
|
|
|
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
|
|
bool* aSnap) const override {
|
|
*aSnap = false;
|
|
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
|
|
}
|
|
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder,
|
|
gfxContext* aCtx) override {
|
|
// Always sync decode, because these icons are UI, and since they're not
|
|
// discardable we'll pay the price of sync decoding at most once.
|
|
uint32_t flags = imgIContainer::FLAG_SYNC_DECODE;
|
|
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
|
|
ImgDrawResult result =
|
|
f->DisplayAltFeedback(*aCtx, GetPaintRect(), ToReferenceFrame(), flags);
|
|
|
|
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
|
|
}
|
|
|
|
bool CreateWebRenderCommands(
|
|
mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const StackingContextHelper& aSc,
|
|
mozilla::layers::RenderRootStateManager* aManager,
|
|
nsDisplayListBuilder* aDisplayListBuilder) override {
|
|
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
|
|
ImgDrawResult result = f->DisplayAltFeedbackWithoutLayer(
|
|
this, aBuilder, aResources, aSc, aManager, aDisplayListBuilder,
|
|
ToReferenceFrame(), flags);
|
|
|
|
return result == ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
NS_DISPLAY_DECL_NAME("AltFeedback", TYPE_ALT_FEEDBACK)
|
|
};
|
|
|
|
ImgDrawResult nsImageFrame::DisplayAltFeedback(gfxContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsPoint aPt, uint32_t aFlags) {
|
|
// We should definitely have a gIconLoad here.
|
|
MOZ_ASSERT(gIconLoad, "How did we succeed in Init then?");
|
|
|
|
// Whether we draw the broken or loading icon.
|
|
bool isLoading = ImageOk(mContent->AsElement()->State());
|
|
|
|
// Calculate the inner area
|
|
nsRect inner = GetInnerArea() + aPt;
|
|
|
|
// Display a recessed one pixel border
|
|
nscoord borderEdgeWidth =
|
|
nsPresContext::CSSPixelsToAppUnits(ALT_BORDER_WIDTH);
|
|
|
|
// if inner area is empty, then make it big enough for at least the icon
|
|
if (inner.IsEmpty()) {
|
|
inner.SizeTo(2 * (nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)),
|
|
2 * (nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)));
|
|
}
|
|
|
|
// Make sure we have enough room to actually render the border within
|
|
// our frame bounds
|
|
if ((inner.width < 2 * borderEdgeWidth) ||
|
|
(inner.height < 2 * borderEdgeWidth)) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
// Paint the border
|
|
if (!isLoading || gIconLoad->mPrefShowLoadingPlaceholder) {
|
|
nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext());
|
|
|
|
// Assert that we're not drawing a border-image here; if we were, we
|
|
// couldn't ignore the ImgDrawResult that PaintBorderWithStyleBorder
|
|
// returns.
|
|
MOZ_ASSERT(recessedBorder.mBorderImageSource.GetType() ==
|
|
eStyleImageType_Null);
|
|
|
|
Unused << nsCSSRendering::PaintBorderWithStyleBorder(
|
|
PresContext(), aRenderingContext, this, inner, inner, recessedBorder,
|
|
mComputedStyle, PaintBorderFlags::SyncDecodeImages);
|
|
}
|
|
|
|
// Adjust the inner rect to account for the one pixel recessed border,
|
|
// and a six pixel padding on each edge
|
|
inner.Deflate(
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH),
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH));
|
|
if (inner.IsEmpty()) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
|
|
|
|
// Clip so we don't render outside the inner rect
|
|
aRenderingContext.Save();
|
|
aRenderingContext.Clip(NSRectToSnappedRect(
|
|
inner, PresContext()->AppUnitsPerDevPixel(), *drawTarget));
|
|
|
|
ImgDrawResult result = ImgDrawResult::NOT_READY;
|
|
|
|
// Check if we should display image placeholders
|
|
if (!ShouldShowBrokenImageIcon() || !gIconLoad->mPrefShowPlaceholders ||
|
|
(isLoading && !gIconLoad->mPrefShowLoadingPlaceholder)) {
|
|
result = ImgDrawResult::SUCCESS;
|
|
} else {
|
|
nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE);
|
|
|
|
imgIRequest* request = isLoading ? nsImageFrame::gIconLoad->mLoadingImage
|
|
: nsImageFrame::gIconLoad->mBrokenImage;
|
|
|
|
// If we weren't previously displaying an icon, register ourselves
|
|
// as an observer for load and animation updates and flag that we're
|
|
// doing so now.
|
|
if (request && !mDisplayingIcon) {
|
|
gIconLoad->AddIconObserver(this);
|
|
mDisplayingIcon = true;
|
|
}
|
|
|
|
WritingMode wm = GetWritingMode();
|
|
bool flushRight =
|
|
(!wm.IsVertical() && !wm.IsBidiLTR()) || wm.IsVerticalRL();
|
|
|
|
// If the icon in question is loaded, draw it.
|
|
uint32_t imageStatus = 0;
|
|
if (request) request->GetImageStatus(&imageStatus);
|
|
if (imageStatus & imgIRequest::STATUS_LOAD_COMPLETE &&
|
|
!(imageStatus & imgIRequest::STATUS_ERROR)) {
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
request->GetImage(getter_AddRefs(imgCon));
|
|
MOZ_ASSERT(imgCon, "Load complete, but no image container?");
|
|
nsRect dest(flushRight ? inner.XMost() - size : inner.x, inner.y, size,
|
|
size);
|
|
result = nsLayoutUtils::DrawSingleImage(
|
|
aRenderingContext, PresContext(), imgCon,
|
|
nsLayoutUtils::GetSamplingFilterForFrame(this), dest, aDirtyRect,
|
|
/* no SVGImageContext */ Nothing(), aFlags);
|
|
}
|
|
|
|
// If we could not draw the icon, just draw some graffiti in the mean time.
|
|
if (result == ImgDrawResult::NOT_READY) {
|
|
ColorPattern color(ToDeviceColor(Color(1.f, 0.f, 0.f, 1.f)));
|
|
|
|
nscoord iconXPos = flushRight ? inner.XMost() - size : inner.x;
|
|
|
|
// stroked rect:
|
|
nsRect rect(iconXPos, inner.y, size, size);
|
|
Rect devPxRect = ToRect(nsLayoutUtils::RectToGfxRect(
|
|
rect, PresContext()->AppUnitsPerDevPixel()));
|
|
drawTarget->StrokeRect(devPxRect, color);
|
|
|
|
// filled circle in bottom right quadrant of stroked rect:
|
|
nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2);
|
|
rect = nsRect(iconXPos + size / 2, inner.y + size / 2, size / 2 - twoPX,
|
|
size / 2 - twoPX);
|
|
devPxRect = ToRect(nsLayoutUtils::RectToGfxRect(
|
|
rect, PresContext()->AppUnitsPerDevPixel()));
|
|
RefPtr<PathBuilder> builder = drawTarget->CreatePathBuilder();
|
|
AppendEllipseToPath(builder, devPxRect.Center(), devPxRect.Size());
|
|
RefPtr<Path> ellipse = builder->Finish();
|
|
drawTarget->Fill(ellipse, color);
|
|
}
|
|
|
|
// Reduce the inner rect by the width of the icon, and leave an
|
|
// additional ICON_PADDING pixels for padding
|
|
int32_t paddedIconSize =
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING);
|
|
if (wm.IsVertical()) {
|
|
inner.y += paddedIconSize;
|
|
inner.height -= paddedIconSize;
|
|
} else {
|
|
if (!flushRight) {
|
|
inner.x += paddedIconSize;
|
|
}
|
|
inner.width -= paddedIconSize;
|
|
}
|
|
}
|
|
|
|
// If there's still room, display the alt-text
|
|
if (!inner.IsEmpty()) {
|
|
nsAutoString altText;
|
|
nsCSSFrameConstructor::GetAlternateTextFor(
|
|
mContent->AsElement(), mContent->NodeInfo()->NameAtom(), altText);
|
|
DisplayAltText(PresContext(), aRenderingContext, altText, inner);
|
|
}
|
|
|
|
aRenderingContext.Restore();
|
|
|
|
return result;
|
|
}
|
|
|
|
ImgDrawResult nsImageFrame::DisplayAltFeedbackWithoutLayer(
|
|
nsDisplayItem* aItem, mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const StackingContextHelper& aSc,
|
|
mozilla::layers::RenderRootStateManager* aManager,
|
|
nsDisplayListBuilder* aDisplayListBuilder, nsPoint aPt, uint32_t aFlags) {
|
|
// We should definitely have a gIconLoad here.
|
|
MOZ_ASSERT(gIconLoad, "How did we succeed in Init then?");
|
|
|
|
// Whether we draw the broken or loading icon.
|
|
bool isLoading = ImageOk(mContent->AsElement()->State());
|
|
|
|
// Calculate the inner area
|
|
nsRect inner = GetInnerArea() + aPt;
|
|
|
|
// Display a recessed one pixel border
|
|
nscoord borderEdgeWidth =
|
|
nsPresContext::CSSPixelsToAppUnits(ALT_BORDER_WIDTH);
|
|
|
|
// if inner area is empty, then make it big enough for at least the icon
|
|
if (inner.IsEmpty()) {
|
|
inner.SizeTo(2 * (nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)),
|
|
2 * (nsPresContext::CSSPixelsToAppUnits(
|
|
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)));
|
|
}
|
|
|
|
// Make sure we have enough room to actually render the border within
|
|
// our frame bounds
|
|
if ((inner.width < 2 * borderEdgeWidth) ||
|
|
(inner.height < 2 * borderEdgeWidth)) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
// If the TextDrawTarget requires fallback we need to rollback everything we
|
|
// may have added to the display list, but we don't find that out until the
|
|
// end.
|
|
bool textDrawResult = true;
|
|
class AutoSaveRestore {
|
|
public:
|
|
explicit AutoSaveRestore(mozilla::wr::DisplayListBuilder& aBuilder,
|
|
bool& aTextDrawResult)
|
|
: mBuilder(aBuilder), mTextDrawResult(aTextDrawResult) {
|
|
mBuilder.Save();
|
|
}
|
|
~AutoSaveRestore() {
|
|
// If we have to use fallback for the text restore the builder and remove
|
|
// anything else we added to the display list, we need to use fallback.
|
|
if (mTextDrawResult) {
|
|
mBuilder.ClearSave();
|
|
} else {
|
|
mBuilder.Restore();
|
|
}
|
|
}
|
|
|
|
private:
|
|
mozilla::wr::DisplayListBuilder& mBuilder;
|
|
bool& mTextDrawResult;
|
|
};
|
|
|
|
AutoSaveRestore autoSaveRestore(aBuilder, textDrawResult);
|
|
|
|
// Paint the border
|
|
if (!isLoading || gIconLoad->mPrefShowLoadingPlaceholder) {
|
|
nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext());
|
|
// Assert that we're not drawing a border-image here; if we were, we
|
|
// couldn't ignore the ImgDrawResult that PaintBorderWithStyleBorder
|
|
// returns.
|
|
MOZ_ASSERT(recessedBorder.mBorderImageSource.GetType() ==
|
|
eStyleImageType_Null);
|
|
|
|
nsRect rect = nsRect(aPt, GetSize());
|
|
Unused << nsCSSRendering::CreateWebRenderCommandsForBorderWithStyleBorder(
|
|
aItem, this, rect, aBuilder, aResources, aSc, aManager,
|
|
aDisplayListBuilder, recessedBorder);
|
|
}
|
|
|
|
// Adjust the inner rect to account for the one pixel recessed border,
|
|
// and a six pixel padding on each edge
|
|
inner.Deflate(
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH),
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH));
|
|
if (inner.IsEmpty()) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
// Clip to this rect so we don't render outside the inner rect
|
|
LayoutDeviceRect bounds = LayoutDeviceRect::FromAppUnits(
|
|
inner, PresContext()->AppUnitsPerDevPixel());
|
|
auto wrBounds = wr::ToRoundedLayoutRect(bounds);
|
|
|
|
// Draw image
|
|
ImgDrawResult result = ImgDrawResult::NOT_READY;
|
|
|
|
// Check if we should display image placeholders
|
|
if (!ShouldShowBrokenImageIcon() || !gIconLoad->mPrefShowPlaceholders ||
|
|
(isLoading && !gIconLoad->mPrefShowLoadingPlaceholder)) {
|
|
result = ImgDrawResult::SUCCESS;
|
|
} else {
|
|
nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE);
|
|
imgIRequest* request = isLoading ? nsImageFrame::gIconLoad->mLoadingImage
|
|
: nsImageFrame::gIconLoad->mBrokenImage;
|
|
|
|
// If we weren't previously displaying an icon, register ourselves
|
|
// as an observer for load and animation updates and flag that we're
|
|
// doing so now.
|
|
if (request && !mDisplayingIcon) {
|
|
gIconLoad->AddIconObserver(this);
|
|
mDisplayingIcon = true;
|
|
}
|
|
|
|
WritingMode wm = GetWritingMode();
|
|
bool flushRight =
|
|
(!wm.IsVertical() && !wm.IsBidiLTR()) || wm.IsVerticalRL();
|
|
|
|
// If the icon in question is loaded, draw it.
|
|
uint32_t imageStatus = 0;
|
|
if (request) request->GetImageStatus(&imageStatus);
|
|
if (imageStatus & imgIRequest::STATUS_LOAD_COMPLETE &&
|
|
!(imageStatus & imgIRequest::STATUS_ERROR)) {
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
request->GetImage(getter_AddRefs(imgCon));
|
|
MOZ_ASSERT(imgCon, "Load complete, but no image container?");
|
|
|
|
nsRect dest(flushRight ? inner.XMost() - size : inner.x, inner.y, size,
|
|
size);
|
|
|
|
const int32_t factor = PresContext()->AppUnitsPerDevPixel();
|
|
LayoutDeviceRect destRect(LayoutDeviceRect::FromAppUnits(dest, factor));
|
|
destRect.Round();
|
|
|
|
Maybe<SVGImageContext> svgContext;
|
|
IntSize decodeSize =
|
|
nsLayoutUtils::ComputeImageContainerDrawingParameters(
|
|
imgCon, this, destRect, aSc, aFlags, svgContext);
|
|
RefPtr<ImageContainer> container;
|
|
result = imgCon->GetImageContainerAtSize(aManager->LayerManager(),
|
|
decodeSize, svgContext, aFlags,
|
|
getter_AddRefs(container));
|
|
if (container) {
|
|
bool wrResult = aManager->CommandBuilder().PushImage(
|
|
aItem, container, aBuilder, aResources, aSc, destRect, bounds);
|
|
result &= wrResult ? ImgDrawResult::SUCCESS : ImgDrawResult::NOT_READY;
|
|
} else {
|
|
// We don't use &= here because we want the result to be NOT_READY so
|
|
// the next block executes.
|
|
result = ImgDrawResult::NOT_READY;
|
|
}
|
|
}
|
|
|
|
// If we could not draw the icon, just draw some graffiti in the mean time.
|
|
if (result == ImgDrawResult::NOT_READY) {
|
|
auto color = wr::ColorF{1.0f, 0.0f, 0.0f, 1.0f};
|
|
bool isBackfaceVisible = !aItem->BackfaceIsHidden();
|
|
|
|
nscoord iconXPos = flushRight ? inner.XMost() - size : inner.x;
|
|
|
|
// stroked rect:
|
|
nsRect rect(iconXPos, inner.y, size, size);
|
|
auto devPxRect = LayoutDeviceRect::FromAppUnits(
|
|
rect, PresContext()->AppUnitsPerDevPixel());
|
|
auto dest = wr::ToRoundedLayoutRect(devPxRect);
|
|
|
|
auto borderWidths = wr::ToBorderWidths(1.0, 1.0, 1.0, 1.0);
|
|
wr::BorderSide side = {color, wr::BorderStyle::Solid};
|
|
wr::BorderSide sides[4] = {side, side, side, side};
|
|
Range<const wr::BorderSide> sidesRange(sides, 4);
|
|
aBuilder.PushBorder(dest, wrBounds, isBackfaceVisible, borderWidths,
|
|
sidesRange, wr::EmptyBorderRadius());
|
|
|
|
// filled circle in bottom right quadrant of stroked rect:
|
|
nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2);
|
|
rect = nsRect(iconXPos + size / 2, inner.y + size / 2, size / 2 - twoPX,
|
|
size / 2 - twoPX);
|
|
devPxRect = LayoutDeviceRect::FromAppUnits(
|
|
rect, PresContext()->AppUnitsPerDevPixel());
|
|
dest = wr::ToRoundedLayoutRect(devPxRect);
|
|
|
|
aBuilder.PushRoundedRect(dest, wrBounds, isBackfaceVisible, color);
|
|
}
|
|
|
|
// Reduce the inner rect by the width of the icon, and leave an
|
|
// additional ICON_PADDING pixels for padding
|
|
int32_t paddedIconSize =
|
|
nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING);
|
|
if (wm.IsVertical()) {
|
|
inner.y += paddedIconSize;
|
|
inner.height -= paddedIconSize;
|
|
} else {
|
|
if (!flushRight) {
|
|
inner.x += paddedIconSize;
|
|
}
|
|
inner.width -= paddedIconSize;
|
|
}
|
|
}
|
|
|
|
// Draw text
|
|
if (!inner.IsEmpty()) {
|
|
RefPtr<TextDrawTarget> textDrawer =
|
|
new TextDrawTarget(aBuilder, aResources, aSc, aManager, aItem, inner,
|
|
/* aCallerDoesSaveRestore = */ true);
|
|
RefPtr<gfxContext> captureCtx = gfxContext::CreateOrNull(textDrawer);
|
|
|
|
nsAutoString altText;
|
|
nsCSSFrameConstructor::GetAlternateTextFor(
|
|
mContent->AsElement(), mContent->NodeInfo()->NameAtom(), altText);
|
|
DisplayAltText(PresContext(), *captureCtx.get(), altText, inner);
|
|
|
|
textDrawer->TerminateShadows();
|
|
textDrawResult = !textDrawer->CheckHasUnsupportedFeatures();
|
|
}
|
|
|
|
// Purposely ignore local DrawResult because we handled it not being success
|
|
// already.
|
|
return textDrawResult ? ImgDrawResult::SUCCESS : ImgDrawResult::NOT_READY;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void PaintDebugImageMap(nsIFrame* aFrame, DrawTarget* aDrawTarget,
|
|
const nsRect& aDirtyRect, nsPoint aPt) {
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(aFrame);
|
|
nsRect inner = f->GetInnerArea() + aPt;
|
|
gfxPoint devPixelOffset = nsLayoutUtils::PointToGfxPoint(
|
|
inner.TopLeft(), aFrame->PresContext()->AppUnitsPerDevPixel());
|
|
AutoRestoreTransform autoRestoreTransform(aDrawTarget);
|
|
aDrawTarget->SetTransform(
|
|
aDrawTarget->GetTransform().PreTranslate(ToPoint(devPixelOffset)));
|
|
f->GetImageMap()->Draw(
|
|
aFrame, *aDrawTarget,
|
|
ColorPattern(ToDeviceColor(Color(0.f, 0.f, 0.f, 1.f))));
|
|
}
|
|
#endif
|
|
|
|
void nsDisplayImage::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
|
|
uint32_t flags = imgIContainer::FLAG_NONE;
|
|
if (aBuilder->ShouldSyncDecodeImages()) {
|
|
flags |= imgIContainer::FLAG_SYNC_DECODE;
|
|
}
|
|
if (aBuilder->IsPaintingToWindow()) {
|
|
flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
|
|
}
|
|
|
|
ImgDrawResult result = static_cast<nsImageFrame*>(mFrame)->PaintImage(
|
|
*aCtx, ToReferenceFrame(), GetPaintRect(), mImage, flags);
|
|
|
|
if (result == ImgDrawResult::NOT_READY ||
|
|
result == ImgDrawResult::INCOMPLETE ||
|
|
result == ImgDrawResult::TEMPORARY_ERROR) {
|
|
// If the current image failed to paint because it's still loading or
|
|
// decoding, try painting the previous image.
|
|
if (mPrevImage) {
|
|
result = static_cast<nsImageFrame*>(mFrame)->PaintImage(
|
|
*aCtx, ToReferenceFrame(), GetPaintRect(), mPrevImage, flags);
|
|
}
|
|
}
|
|
|
|
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
|
|
}
|
|
|
|
nsDisplayItemGeometry* nsDisplayImage::AllocateGeometry(
|
|
nsDisplayListBuilder* aBuilder) {
|
|
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
|
|
}
|
|
|
|
void nsDisplayImage::ComputeInvalidationRegion(
|
|
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
|
|
nsRegion* aInvalidRegion) const {
|
|
auto geometry =
|
|
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
|
|
|
|
if (aBuilder->ShouldSyncDecodeImages() &&
|
|
geometry->ShouldInvalidateToSyncDecodeImages()) {
|
|
bool snap;
|
|
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
|
|
}
|
|
|
|
nsDisplayImageContainer::ComputeInvalidationRegion(aBuilder, aGeometry,
|
|
aInvalidRegion);
|
|
}
|
|
|
|
already_AddRefed<imgIContainer> nsDisplayImage::GetImage() {
|
|
nsCOMPtr<imgIContainer> image = mImage;
|
|
return image.forget();
|
|
}
|
|
|
|
nsRect nsDisplayImage::GetDestRect() const {
|
|
bool snap = true;
|
|
const nsRect frameContentBox = GetBounds(&snap);
|
|
|
|
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(mFrame);
|
|
return imageFrame->PredictedDestRect(frameContentBox);
|
|
}
|
|
|
|
LayerState nsDisplayImage::GetLayerState(
|
|
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
|
|
const ContainerLayerParameters& aParameters) {
|
|
if (!nsDisplayItem::ForceActiveLayers()) {
|
|
bool animated = false;
|
|
if (!nsLayoutUtils::AnimatedImageLayersEnabled() ||
|
|
mImage->GetType() != imgIContainer::TYPE_RASTER ||
|
|
NS_FAILED(mImage->GetAnimated(&animated)) || !animated) {
|
|
if (!aManager->IsCompositingCheap() ||
|
|
!nsLayoutUtils::GPUImageScalingEnabled()) {
|
|
return LAYER_NONE;
|
|
}
|
|
}
|
|
|
|
if (!animated) {
|
|
int32_t imageWidth;
|
|
int32_t imageHeight;
|
|
mImage->GetWidth(&imageWidth);
|
|
mImage->GetHeight(&imageHeight);
|
|
|
|
NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!");
|
|
|
|
const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
|
|
const LayoutDeviceRect destRect =
|
|
LayoutDeviceRect::FromAppUnits(GetDestRect(), factor);
|
|
const LayerRect destLayerRect = destRect * aParameters.Scale();
|
|
|
|
// Calculate the scaling factor for the frame.
|
|
const gfxSize scale = gfxSize(destLayerRect.width / imageWidth,
|
|
destLayerRect.height / imageHeight);
|
|
|
|
// If we are not scaling at all, no point in separating this into a layer.
|
|
if (scale.width == 1.0f && scale.height == 1.0f) {
|
|
return LAYER_NONE;
|
|
}
|
|
|
|
// If the target size is pretty small, no point in using a layer.
|
|
if (destLayerRect.width * destLayerRect.height < 64 * 64) {
|
|
return LAYER_NONE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!CanOptimizeToImageLayer(aManager, aBuilder)) {
|
|
return LAYER_NONE;
|
|
}
|
|
|
|
// Image layer doesn't support draw focus ring for image map.
|
|
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
|
|
if (f->HasImageMap()) {
|
|
return LAYER_NONE;
|
|
}
|
|
|
|
return LAYER_ACTIVE;
|
|
}
|
|
|
|
/* virtual */
|
|
nsRegion nsDisplayImage::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aSnap) const {
|
|
*aSnap = false;
|
|
if (mImage && mImage->WillDrawOpaqueNow()) {
|
|
const nsRect frameContentBox = GetBounds(aSnap);
|
|
return GetDestRect().Intersect(frameContentBox);
|
|
}
|
|
return nsRegion();
|
|
}
|
|
|
|
already_AddRefed<Layer> nsDisplayImage::BuildLayer(
|
|
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
|
|
const ContainerLayerParameters& aParameters) {
|
|
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
|
|
if (aBuilder->ShouldSyncDecodeImages()) {
|
|
flags |= imgIContainer::FLAG_SYNC_DECODE;
|
|
}
|
|
|
|
RefPtr<ImageContainer> container = mImage->GetImageContainer(aManager, flags);
|
|
if (!container || !container->HasCurrentImage()) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ImageLayer> layer = static_cast<ImageLayer*>(
|
|
aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
|
|
if (!layer) {
|
|
layer = aManager->CreateImageLayer();
|
|
if (!layer) return nullptr;
|
|
}
|
|
layer->SetContainer(container);
|
|
ConfigureLayer(layer, aParameters);
|
|
return layer.forget();
|
|
}
|
|
|
|
bool nsDisplayImage::CreateWebRenderCommands(
|
|
mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const StackingContextHelper& aSc, RenderRootStateManager* aManager,
|
|
nsDisplayListBuilder* aDisplayListBuilder) {
|
|
if (!mImage) {
|
|
return false;
|
|
}
|
|
|
|
MOZ_ASSERT(mFrame->IsImageFrame() || mFrame->IsImageControlFrame());
|
|
// Image layer doesn't support draw focus ring for image map.
|
|
nsImageFrame* frame = static_cast<nsImageFrame*>(mFrame);
|
|
if (frame->HasImageMap()) {
|
|
return false;
|
|
}
|
|
|
|
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
|
|
if (aDisplayListBuilder->IsPaintingToWindow()) {
|
|
flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
|
|
}
|
|
if (aDisplayListBuilder->ShouldSyncDecodeImages()) {
|
|
flags |= imgIContainer::FLAG_SYNC_DECODE;
|
|
}
|
|
|
|
const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
|
|
LayoutDeviceRect destRect(
|
|
LayoutDeviceRect::FromAppUnits(GetDestRect(), factor));
|
|
destRect.Round();
|
|
|
|
Maybe<SVGImageContext> svgContext;
|
|
IntSize decodeSize = nsLayoutUtils::ComputeImageContainerDrawingParameters(
|
|
mImage, mFrame, destRect, aSc, flags, svgContext);
|
|
|
|
RefPtr<layers::ImageContainer> container;
|
|
ImgDrawResult drawResult = mImage->GetImageContainerAtSize(
|
|
aManager->LayerManager(), decodeSize, svgContext, flags,
|
|
getter_AddRefs(container));
|
|
|
|
// While we got a container, it may not contain a fully decoded surface. If
|
|
// that is the case, and we have an image we were previously displaying which
|
|
// has a fully decoded surface, then we should prefer the previous image.
|
|
bool updatePrevImage = false;
|
|
switch (drawResult) {
|
|
case ImgDrawResult::NOT_READY:
|
|
case ImgDrawResult::INCOMPLETE:
|
|
case ImgDrawResult::TEMPORARY_ERROR:
|
|
if (mPrevImage && mPrevImage != mImage) {
|
|
RefPtr<ImageContainer> prevContainer;
|
|
drawResult = mPrevImage->GetImageContainerAtSize(
|
|
aManager->LayerManager(), decodeSize, svgContext, flags,
|
|
getter_AddRefs(prevContainer));
|
|
if (prevContainer && drawResult == ImgDrawResult::SUCCESS) {
|
|
container = std::move(prevContainer);
|
|
break;
|
|
}
|
|
|
|
// Previous image was unusable; we can forget about it.
|
|
updatePrevImage = true;
|
|
}
|
|
break;
|
|
case ImgDrawResult::NOT_SUPPORTED:
|
|
return false;
|
|
default:
|
|
updatePrevImage = mPrevImage != mImage;
|
|
break;
|
|
}
|
|
|
|
// The previous image was not used, and is different from the current image.
|
|
// We should forget about it. We need to update the frame as well because the
|
|
// display item may get recreated.
|
|
if (updatePrevImage) {
|
|
mPrevImage = mImage;
|
|
frame->mPrevImage = frame->mImage;
|
|
}
|
|
|
|
// If the image container is empty, we don't want to fallback. Any other
|
|
// failure will be due to resource constraints and fallback is unlikely to
|
|
// help us. Hence we can ignore the return value from PushImage.
|
|
if (container) {
|
|
aManager->CommandBuilder().PushImage(this, container, aBuilder, aResources,
|
|
aSc, destRect, destRect);
|
|
}
|
|
|
|
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, drawResult);
|
|
return true;
|
|
}
|
|
|
|
ImgDrawResult nsImageFrame::PaintImage(gfxContext& aRenderingContext,
|
|
nsPoint aPt, const nsRect& aDirtyRect,
|
|
imgIContainer* aImage, uint32_t aFlags) {
|
|
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
|
|
|
|
// Render the image into our content area (the area inside
|
|
// the borders and padding)
|
|
NS_ASSERTION(GetInnerArea().width == mComputedSize.width, "bad width");
|
|
|
|
// NOTE: We use mComputedSize instead of just GetInnerArea()'s own size here,
|
|
// because GetInnerArea() might be smaller if we're fragmented, whereas
|
|
// mComputedSize has our full content-box size (which we need for
|
|
// ComputeObjectDestRect to work correctly).
|
|
nsRect constraintRect(aPt + GetInnerArea().TopLeft(), mComputedSize);
|
|
constraintRect.y -= GetContinuationOffset();
|
|
|
|
nsPoint anchorPoint;
|
|
nsRect dest = nsLayoutUtils::ComputeObjectDestRect(
|
|
constraintRect, mIntrinsicSize, mIntrinsicRatio, StylePosition(),
|
|
&anchorPoint);
|
|
|
|
uint32_t flags = aFlags;
|
|
if (mForceSyncDecoding) {
|
|
flags |= imgIContainer::FLAG_SYNC_DECODE;
|
|
}
|
|
|
|
Maybe<SVGImageContext> svgContext;
|
|
SVGImageContext::MaybeStoreContextPaint(svgContext, this, aImage);
|
|
|
|
ImgDrawResult result = nsLayoutUtils::DrawSingleImage(
|
|
aRenderingContext, PresContext(), aImage,
|
|
nsLayoutUtils::GetSamplingFilterForFrame(this), dest, aDirtyRect,
|
|
svgContext, flags, &anchorPoint);
|
|
|
|
if (nsImageMap* map = GetImageMap()) {
|
|
gfxPoint devPixelOffset = nsLayoutUtils::PointToGfxPoint(
|
|
dest.TopLeft(), PresContext()->AppUnitsPerDevPixel());
|
|
AutoRestoreTransform autoRestoreTransform(drawTarget);
|
|
drawTarget->SetTransform(
|
|
drawTarget->GetTransform().PreTranslate(ToPoint(devPixelOffset)));
|
|
|
|
// solid white stroke:
|
|
ColorPattern white(ToDeviceColor(Color(1.f, 1.f, 1.f, 1.f)));
|
|
map->Draw(this, *drawTarget, white);
|
|
|
|
// then dashed black stroke over the top:
|
|
ColorPattern black(ToDeviceColor(Color(0.f, 0.f, 0.f, 1.f)));
|
|
StrokeOptions strokeOptions;
|
|
nsLayoutUtils::InitDashPattern(strokeOptions, StyleBorderStyle::Dotted);
|
|
map->Draw(this, *drawTarget, black, strokeOptions);
|
|
}
|
|
|
|
if (result == ImgDrawResult::SUCCESS) {
|
|
mPrevImage = aImage;
|
|
} else if (result == ImgDrawResult::BAD_IMAGE) {
|
|
mPrevImage = nullptr;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
already_AddRefed<imgIRequest> nsImageFrame::GetCurrentRequest() const {
|
|
if (mKind != Kind::ImageElement) {
|
|
return do_AddRef(mContentURLRequest);
|
|
}
|
|
|
|
MOZ_ASSERT(!mContentURLRequest);
|
|
|
|
nsCOMPtr<imgIRequest> request;
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
MOZ_ASSERT(imageLoader);
|
|
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(request));
|
|
return request.forget();
|
|
}
|
|
|
|
void nsImageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsDisplayListSet& aLists) {
|
|
if (!IsVisibleForPainting()) return;
|
|
|
|
DisplayBorderBackgroundOutline(aBuilder, aLists);
|
|
|
|
uint32_t clipFlags =
|
|
nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())
|
|
? 0
|
|
: DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT;
|
|
|
|
DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(
|
|
aBuilder, this, clipFlags);
|
|
|
|
if (mComputedSize.width != 0 && mComputedSize.height != 0) {
|
|
bool imageOK = ImageOk(mContent->AsElement()->State());
|
|
|
|
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
|
|
|
|
// XXX(seth): The SizeIsAvailable check here should not be necessary - the
|
|
// intention is that a non-null mImage means we have a size, but there is
|
|
// currently some code that violates this invariant.
|
|
if (!imageOK || !mImage || !SizeIsAvailable(currentRequest)) {
|
|
// No image yet, or image load failed. Draw the alt-text and an icon
|
|
// indicating the status
|
|
aLists.Content()->AppendNewToTop<nsDisplayAltFeedback>(aBuilder, this);
|
|
|
|
// This image is visible (we are being asked to paint it) but it's not
|
|
// decoded yet. And we are not going to ask the image to draw, so this
|
|
// may be the only chance to tell it that it should decode.
|
|
if (currentRequest) {
|
|
uint32_t status = 0;
|
|
currentRequest->GetImageStatus(&status);
|
|
if (!(status & imgIRequest::STATUS_DECODE_COMPLETE)) {
|
|
MaybeDecodeForPredictedSize();
|
|
}
|
|
// Increase loading priority if the image is ready to be displayed.
|
|
if (!(status & imgIRequest::STATUS_LOAD_COMPLETE)) {
|
|
currentRequest->BoostPriority(imgIRequest::CATEGORY_DISPLAY);
|
|
}
|
|
}
|
|
} else {
|
|
aLists.Content()->AppendNewToTop<nsDisplayImage>(aBuilder, this, mImage,
|
|
mPrevImage);
|
|
|
|
// If we were previously displaying an icon, we're not anymore
|
|
if (mDisplayingIcon) {
|
|
gIconLoad->RemoveIconObserver(this);
|
|
mDisplayingIcon = false;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (GetShowFrameBorders() && GetImageMap()) {
|
|
aLists.Outlines()->AppendNewToTop<nsDisplayGeneric>(
|
|
aBuilder, this, PaintDebugImageMap, "DebugImageMap",
|
|
DisplayItemType::TYPE_DEBUG_IMAGE_MAP);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (ShouldDisplaySelection()) {
|
|
DisplaySelectionOverlay(aBuilder, aLists.Content(),
|
|
nsISelectionDisplay::DISPLAY_IMAGES);
|
|
}
|
|
}
|
|
|
|
bool nsImageFrame::ShouldDisplaySelection() {
|
|
int16_t displaySelection = PresShell()->GetSelectionFlags();
|
|
if (!(displaySelection & nsISelectionDisplay::DISPLAY_IMAGES))
|
|
return false; // no need to check the blue border, we cannot be drawn
|
|
// selected
|
|
|
|
// If the image is the only selected node, don't draw the selection overlay.
|
|
// This can happen when selecting an image in contenteditable context.
|
|
if (displaySelection == nsISelectionDisplay::DISPLAY_ALL) {
|
|
if (const nsFrameSelection* frameSelection = GetConstFrameSelection()) {
|
|
const Selection* selection =
|
|
frameSelection->GetSelection(SelectionType::eNormal);
|
|
if (selection && selection->RangeCount() == 1) {
|
|
nsINode* parent = mContent->GetParent();
|
|
int32_t thisOffset = parent->ComputeIndexOf(mContent);
|
|
nsRange* range = selection->GetRangeAt(0);
|
|
if (range->GetStartContainer() == parent &&
|
|
range->GetEndContainer() == parent &&
|
|
static_cast<int32_t>(range->StartOffset()) == thisOffset &&
|
|
static_cast<int32_t>(range->EndOffset()) == thisOffset + 1) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
nsImageMap* nsImageFrame::GetImageMap() {
|
|
if (!mImageMap) {
|
|
if (nsIContent* map = GetMapElement()) {
|
|
mImageMap = new nsImageMap();
|
|
mImageMap->Init(this, map);
|
|
}
|
|
}
|
|
|
|
return mImageMap;
|
|
}
|
|
|
|
bool nsImageFrame::IsServerImageMap() {
|
|
return mContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::ismap);
|
|
}
|
|
|
|
// Translate an point that is relative to our frame
|
|
// into a localized pixel coordinate that is relative to the
|
|
// content area of this frame (inside the border+padding).
|
|
void nsImageFrame::TranslateEventCoords(const nsPoint& aPoint,
|
|
nsIntPoint& aResult) {
|
|
nscoord x = aPoint.x;
|
|
nscoord y = aPoint.y;
|
|
|
|
// Subtract out border and padding here so that the coordinates are
|
|
// now relative to the content area of this frame.
|
|
nsRect inner = GetInnerArea();
|
|
x -= inner.x;
|
|
y -= inner.y;
|
|
|
|
aResult.x = nsPresContext::AppUnitsToIntCSSPixels(x);
|
|
aResult.y = nsPresContext::AppUnitsToIntCSSPixels(y);
|
|
}
|
|
|
|
bool nsImageFrame::GetAnchorHREFTargetAndNode(nsIURI** aHref, nsString& aTarget,
|
|
nsIContent** aNode) {
|
|
bool status = false;
|
|
aTarget.Truncate();
|
|
*aHref = nullptr;
|
|
*aNode = nullptr;
|
|
|
|
// Walk up the content tree, looking for an nsIDOMAnchorElement
|
|
for (nsIContent* content = mContent->GetParent(); content;
|
|
content = content->GetParent()) {
|
|
nsCOMPtr<dom::Link> link(do_QueryInterface(content));
|
|
if (link) {
|
|
nsCOMPtr<nsIURI> href = content->GetHrefURI();
|
|
if (href) {
|
|
href.forget(aHref);
|
|
}
|
|
status = (*aHref != nullptr);
|
|
|
|
RefPtr<HTMLAnchorElement> anchor = HTMLAnchorElement::FromNode(content);
|
|
if (anchor) {
|
|
anchor->GetTarget(aTarget);
|
|
}
|
|
NS_ADDREF(*aNode = content);
|
|
break;
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
nsresult nsImageFrame::GetContentForEvent(WidgetEvent* aEvent,
|
|
nsIContent** aContent) {
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
|
|
nsIFrame* f = nsLayoutUtils::GetNonGeneratedAncestor(this);
|
|
if (f != this) {
|
|
return f->GetContentForEvent(aEvent, aContent);
|
|
}
|
|
|
|
// XXX We need to make this special check for area element's capturing the
|
|
// mouse due to bug 135040. Remove it once that's fixed.
|
|
nsIContent* capturingContent = aEvent->HasMouseEventMessage()
|
|
? PresShell::GetCapturingContent()
|
|
: nullptr;
|
|
if (capturingContent && capturingContent->GetPrimaryFrame() == this) {
|
|
*aContent = capturingContent;
|
|
NS_IF_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (nsImageMap* map = GetImageMap()) {
|
|
nsIntPoint p;
|
|
TranslateEventCoords(
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this), p);
|
|
nsCOMPtr<nsIContent> area = map->GetArea(p.x, p.y);
|
|
if (area) {
|
|
area.forget(aContent);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
*aContent = GetContent();
|
|
NS_IF_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
// XXX what should clicks on transparent pixels do?
|
|
nsresult nsImageFrame::HandleEvent(nsPresContext* aPresContext,
|
|
WidgetGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus) {
|
|
NS_ENSURE_ARG_POINTER(aEventStatus);
|
|
|
|
if ((aEvent->mMessage == eMouseClick &&
|
|
aEvent->AsMouseEvent()->mButton == MouseButton::eLeft) ||
|
|
aEvent->mMessage == eMouseMove) {
|
|
nsImageMap* map = GetImageMap();
|
|
bool isServerMap = IsServerImageMap();
|
|
if (map || isServerMap) {
|
|
nsIntPoint p;
|
|
TranslateEventCoords(
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this), p);
|
|
bool inside = false;
|
|
// Even though client-side image map triggering happens
|
|
// through content, we need to make sure we're not inside
|
|
// (in case we deal with a case of both client-side and
|
|
// sever-side on the same image - it happens!)
|
|
if (nullptr != map) {
|
|
inside = !!map->GetArea(p.x, p.y);
|
|
}
|
|
|
|
if (!inside && isServerMap) {
|
|
// Server side image maps use the href in a containing anchor
|
|
// element to provide the basis for the destination url.
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsAutoString target;
|
|
nsCOMPtr<nsIContent> anchorNode;
|
|
if (GetAnchorHREFTargetAndNode(getter_AddRefs(uri), target,
|
|
getter_AddRefs(anchorNode))) {
|
|
// XXX if the mouse is over/clicked in the border/padding area
|
|
// we should probably just pretend nothing happened. Nav4
|
|
// keeps the x,y coordinates positive as we do; IE doesn't
|
|
// bother. Both of them send the click through even when the
|
|
// mouse is over the border.
|
|
if (p.x < 0) p.x = 0;
|
|
if (p.y < 0) p.y = 0;
|
|
|
|
nsAutoCString spec;
|
|
nsresult rv = uri->GetSpec(spec);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
spec += nsPrintfCString("?%d,%d", p.x, p.y);
|
|
rv = NS_MutateURI(uri).SetSpec(spec).Finalize(uri);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
bool clicked = false;
|
|
if (aEvent->mMessage == eMouseClick && !aEvent->DefaultPrevented()) {
|
|
*aEventStatus = nsEventStatus_eConsumeDoDefault;
|
|
clicked = true;
|
|
}
|
|
nsContentUtils::TriggerLink(anchorNode, aPresContext, uri, target,
|
|
clicked, /* isTrusted */ true);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsAtomicContainerFrame::HandleEvent(aPresContext, aEvent,
|
|
aEventStatus);
|
|
}
|
|
|
|
Maybe<nsIFrame::Cursor> nsImageFrame::GetCursor(const nsPoint& aPoint) {
|
|
nsImageMap* map = GetImageMap();
|
|
if (!map) {
|
|
return nsFrame::GetCursor(aPoint);
|
|
}
|
|
nsIntPoint p;
|
|
TranslateEventCoords(aPoint, p);
|
|
HTMLAreaElement* area = map->GetArea(p.x, p.y);
|
|
if (!area) {
|
|
return nsFrame::GetCursor(aPoint);
|
|
}
|
|
|
|
// Use the cursor from the style of the *area* element.
|
|
RefPtr<ComputedStyle> areaStyle =
|
|
PresShell()->StyleSet()->ResolveStyleLazily(*area);
|
|
StyleCursorKind kind = areaStyle->StyleUI()->mCursor;
|
|
if (kind == StyleCursorKind::Auto) {
|
|
kind = StyleCursorKind::Default;
|
|
}
|
|
return Some(Cursor{kind, AllowCustomCursorImage::Yes, std::move(areaStyle)});
|
|
}
|
|
|
|
nsresult nsImageFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsAtom* aAttribute, int32_t aModType) {
|
|
nsresult rv = nsAtomicContainerFrame::AttributeChanged(aNameSpaceID,
|
|
aAttribute, aModType);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsGkAtoms::alt == aAttribute) {
|
|
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsImageFrame::OnVisibilityChange(
|
|
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
|
|
if (mKind == Kind::ImageElement) {
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
|
|
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
|
|
}
|
|
|
|
if (aNewVisibility == Visibility::ApproximatelyVisible) {
|
|
MaybeDecodeForPredictedSize();
|
|
}
|
|
|
|
nsAtomicContainerFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
nsresult nsImageFrame::GetFrameName(nsAString& aResult) const {
|
|
return MakeFrameName(NS_LITERAL_STRING("ImageFrame"), aResult);
|
|
}
|
|
|
|
void nsImageFrame::List(FILE* out, const char* aPrefix, uint32_t aFlags) const {
|
|
nsCString str;
|
|
ListGeneric(str, aPrefix, aFlags);
|
|
|
|
// output the img src url
|
|
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
currentRequest->GetURI(getter_AddRefs(uri));
|
|
nsAutoCString uristr;
|
|
uri->GetAsciiSpec(uristr);
|
|
str += nsPrintfCString(" [src=%s]", uristr.get());
|
|
}
|
|
fprintf_stderr(out, "%s\n", str.get());
|
|
}
|
|
#endif
|
|
|
|
nsIFrame::LogicalSides nsImageFrame::GetLogicalSkipSides(
|
|
const ReflowInput* aReflowInput) const {
|
|
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
|
|
StyleBoxDecorationBreak::Clone)) {
|
|
return LogicalSides();
|
|
}
|
|
LogicalSides skip;
|
|
if (nullptr != GetPrevInFlow()) {
|
|
skip |= eLogicalSideBitsBStart;
|
|
}
|
|
if (nullptr != GetNextInFlow()) {
|
|
skip |= eLogicalSideBitsBEnd;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
nsresult nsImageFrame::GetIntrinsicImageSize(nsSize& aSize) {
|
|
if (mIntrinsicSize.width && mIntrinsicSize.height) {
|
|
aSize.SizeTo(*mIntrinsicSize.width, *mIntrinsicSize.height);
|
|
return NS_OK;
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult nsImageFrame::LoadIcon(const nsAString& aSpec,
|
|
nsPresContext* aPresContext,
|
|
imgRequestProxy** aRequest) {
|
|
nsresult rv = NS_OK;
|
|
MOZ_ASSERT(!aSpec.IsEmpty(), "What happened??");
|
|
|
|
if (!sIOService) {
|
|
rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> realURI;
|
|
SpecToURI(aSpec, sIOService, getter_AddRefs(realURI));
|
|
|
|
RefPtr<imgLoader> il =
|
|
nsContentUtils::GetImgLoaderForDocument(aPresContext->Document());
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
GetLoadGroup(aPresContext, getter_AddRefs(loadGroup));
|
|
|
|
// For icon loads, we don't need to merge with the loadgroup flags
|
|
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL;
|
|
nsContentPolicyType contentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE;
|
|
|
|
return il->LoadImage(
|
|
realURI, /* icon URI */
|
|
nullptr, /* initial document URI; this is only
|
|
relevant for cookies, so does not
|
|
apply to icons. */
|
|
nullptr, /* referrer (not relevant for icons) */
|
|
mozilla::net::RP_Unset, nullptr, /* principal (not relevant for icons) */
|
|
0, loadGroup, gIconLoad, nullptr, /* No context */
|
|
nullptr, /* Not associated with any particular document */
|
|
loadFlags, nullptr, contentPolicyType, EmptyString(),
|
|
false, /* aUseUrgentStartForChannel */
|
|
aRequest);
|
|
}
|
|
|
|
void nsImageFrame::GetDocumentCharacterSet(nsACString& aCharset) const {
|
|
if (mContent) {
|
|
NS_ASSERTION(mContent->GetComposedDoc(),
|
|
"Frame still alive after content removed from document!");
|
|
mContent->GetComposedDoc()->GetDocumentCharacterSet()->Name(aCharset);
|
|
}
|
|
}
|
|
|
|
void nsImageFrame::SpecToURI(const nsAString& aSpec, nsIIOService* aIOService,
|
|
nsIURI** aURI) {
|
|
nsCOMPtr<nsIURI> baseURI;
|
|
if (mContent) {
|
|
baseURI = mContent->GetBaseURI();
|
|
}
|
|
nsAutoCString charset;
|
|
GetDocumentCharacterSet(charset);
|
|
NS_NewURI(aURI, aSpec, charset.IsEmpty() ? nullptr : charset.get(), baseURI,
|
|
aIOService);
|
|
}
|
|
|
|
void nsImageFrame::GetLoadGroup(nsPresContext* aPresContext,
|
|
nsILoadGroup** aLoadGroup) {
|
|
if (!aPresContext) return;
|
|
|
|
MOZ_ASSERT(nullptr != aLoadGroup, "null OUT parameter pointer");
|
|
|
|
mozilla::PresShell* presShell = aPresContext->GetPresShell();
|
|
if (!presShell) {
|
|
return;
|
|
}
|
|
|
|
Document* doc = presShell->GetDocument();
|
|
if (!doc) {
|
|
return;
|
|
}
|
|
|
|
*aLoadGroup = doc->GetDocumentLoadGroup().take();
|
|
}
|
|
|
|
nsresult nsImageFrame::LoadIcons(nsPresContext* aPresContext) {
|
|
NS_ASSERTION(!gIconLoad, "called LoadIcons twice");
|
|
|
|
NS_NAMED_LITERAL_STRING(loadingSrc,
|
|
"resource://gre-resources/loading-image.png");
|
|
NS_NAMED_LITERAL_STRING(brokenSrc,
|
|
"resource://gre-resources/broken-image.png");
|
|
|
|
gIconLoad = new IconLoad();
|
|
|
|
nsresult rv;
|
|
// create a loader and load the images
|
|
rv = LoadIcon(loadingSrc, aPresContext,
|
|
getter_AddRefs(gIconLoad->mLoadingImage));
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
rv = LoadIcon(brokenSrc, aPresContext,
|
|
getter_AddRefs(gIconLoad->mBrokenImage));
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsImageFrame::IconLoad, nsIObserver, imgINotificationObserver)
|
|
|
|
static const char* kIconLoadPrefs[] = {
|
|
"browser.display.force_inline_alttext",
|
|
"browser.display.show_image_placeholders",
|
|
"browser.display.show_loading_image_placeholder", nullptr};
|
|
|
|
nsImageFrame::IconLoad::IconLoad() {
|
|
// register observers
|
|
Preferences::AddStrongObservers(this, kIconLoadPrefs);
|
|
GetPrefs();
|
|
}
|
|
|
|
void nsImageFrame::IconLoad::Shutdown() {
|
|
Preferences::RemoveObservers(this, kIconLoadPrefs);
|
|
// in case the pref service releases us later
|
|
if (mLoadingImage) {
|
|
mLoadingImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
|
|
mLoadingImage = nullptr;
|
|
}
|
|
if (mBrokenImage) {
|
|
mBrokenImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
|
|
mBrokenImage = nullptr;
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::Observe(nsISupports* aSubject, const char* aTopic,
|
|
const char16_t* aData) {
|
|
NS_ASSERTION(!nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID),
|
|
"wrong topic");
|
|
#ifdef DEBUG
|
|
// assert |aData| is one of our prefs.
|
|
uint32_t i = 0;
|
|
for (; i < ArrayLength(kIconLoadPrefs); ++i) {
|
|
if (NS_ConvertASCIItoUTF16(kIconLoadPrefs[i]) == nsDependentString(aData))
|
|
break;
|
|
}
|
|
MOZ_ASSERT(i < ArrayLength(kIconLoadPrefs));
|
|
#endif
|
|
|
|
GetPrefs();
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsImageFrame::IconLoad::GetPrefs() {
|
|
mPrefForceInlineAltText =
|
|
Preferences::GetBool("browser.display.force_inline_alttext");
|
|
|
|
mPrefShowPlaceholders =
|
|
Preferences::GetBool("browser.display.show_image_placeholders", true);
|
|
|
|
mPrefShowLoadingPlaceholder = Preferences::GetBool(
|
|
"browser.display.show_loading_image_placeholder", true);
|
|
}
|
|
|
|
nsresult nsImageFrame::RestartAnimation() {
|
|
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
|
|
/*
|
|
* We cannot count on mContentURLRequestRegistered to make
|
|
* the deregistration work. So, we are going to force it.
|
|
*/
|
|
bool deregister = true;
|
|
|
|
if (currentRequest && !mContentURLRequestRegistered) {
|
|
nsLayoutUtils::RegisterImageRequestIfAnimated(PresContext(), currentRequest,
|
|
&deregister);
|
|
return currentRequest->StartDecoding(imgIContainer::FLAG_NONE);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsImageFrame::StopAnimation() {
|
|
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
|
|
/*
|
|
* We cannot count on mContentURLRequestRegistered to make
|
|
* the deregistration work. So, we are going to force it.
|
|
*/
|
|
bool deregister = true;
|
|
|
|
if (currentRequest) {
|
|
nsLayoutUtils::DeregisterImageRequest(PresContext(), currentRequest,
|
|
&deregister);
|
|
return currentRequest->CancelAndForgetObserver(NS_BINDING_ABORTED);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IconLoad::Notify(imgIRequest* aRequest, int32_t aType,
|
|
const nsIntRect* aData) {
|
|
MOZ_ASSERT(aRequest);
|
|
|
|
if (aType != imgINotificationObserver::LOAD_COMPLETE &&
|
|
aType != imgINotificationObserver::FRAME_UPDATE) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
aRequest->GetImage(getter_AddRefs(image));
|
|
if (!image) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Retrieve the image's intrinsic size.
|
|
int32_t width = 0;
|
|
int32_t height = 0;
|
|
image->GetWidth(&width);
|
|
image->GetHeight(&height);
|
|
|
|
// Request a decode at that size.
|
|
image->RequestDecodeForSize(IntSize(width, height),
|
|
imgIContainer::DECODE_FLAGS_DEFAULT |
|
|
imgIContainer::FLAG_HIGH_QUALITY_SCALING);
|
|
}
|
|
|
|
nsTObserverArray<nsImageFrame*>::ForwardIterator iter(mIconObservers);
|
|
nsImageFrame* frame;
|
|
while (iter.HasMore()) {
|
|
frame = iter.GetNext();
|
|
frame->InvalidateFrame();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsImageListener, imgINotificationObserver)
|
|
|
|
nsImageListener::nsImageListener(nsImageFrame* aFrame) : mFrame(aFrame) {}
|
|
|
|
nsImageListener::~nsImageListener() = default;
|
|
|
|
NS_IMETHODIMP
|
|
nsImageListener::Notify(imgIRequest* aRequest, int32_t aType,
|
|
const nsIntRect* aData) {
|
|
if (!mFrame) return NS_ERROR_FAILURE;
|
|
|
|
return mFrame->Notify(aRequest, aType, aData);
|
|
}
|
|
|
|
static bool IsInAutoWidthTableCellForQuirk(nsIFrame* aFrame) {
|
|
if (eCompatibility_NavQuirks != aFrame->PresContext()->CompatibilityMode())
|
|
return false;
|
|
// Check if the parent of the closest nsBlockFrame has auto width.
|
|
nsBlockFrame* ancestor = nsLayoutUtils::FindNearestBlockAncestor(aFrame);
|
|
if (ancestor->Style()->GetPseudoType() == PseudoStyleType::cellContent) {
|
|
// Assume direct parent is a table cell frame.
|
|
nsFrame* grandAncestor = static_cast<nsFrame*>(ancestor->GetParent());
|
|
return grandAncestor && grandAncestor->StylePosition()->mWidth.IsAuto();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* virtual */
|
|
void nsImageFrame::AddInlineMinISize(gfxContext* aRenderingContext,
|
|
nsIFrame::InlineMinISizeData* aData) {
|
|
nscoord isize = nsLayoutUtils::IntrinsicForContainer(
|
|
aRenderingContext, this, nsLayoutUtils::MIN_ISIZE);
|
|
bool canBreak = !IsInAutoWidthTableCellForQuirk(this);
|
|
aData->DefaultAddInlineMinISize(this, isize, canBreak);
|
|
}
|