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-rw-r--r--layout/forms/nsProgressFrame.cpp248
1 files changed, 248 insertions, 0 deletions
diff --git a/layout/forms/nsProgressFrame.cpp b/layout/forms/nsProgressFrame.cpp
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+++ b/layout/forms/nsProgressFrame.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsProgressFrame.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLProgressElement.h"
+#include "nsIContent.h"
+#include "nsLayoutUtils.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsNameSpaceManager.h"
+#include "nsNodeInfoManager.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsFontMetrics.h"
+#include "nsCSSPseudoElements.h"
+#include "nsStyleConsts.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsIFrame* NS_NewProgressFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+ return new (aPresShell) nsProgressFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsProgressFrame)
+
+nsProgressFrame::nsProgressFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext)
+ : nsContainerFrame(aStyle, aPresContext, kClassID), mBarDiv(nullptr) {}
+
+nsProgressFrame::~nsProgressFrame() = default;
+
+void nsProgressFrame::Destroy(DestroyContext& aContext) {
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsProgressFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+ aContext.AddAnonymousContent(mBarDiv.forget());
+ nsContainerFrame::Destroy(aContext);
+}
+
+nsresult nsProgressFrame::CreateAnonymousContent(
+ nsTArray<ContentInfo>& aElements) {
+ // Create the progress bar div.
+ nsCOMPtr<Document> doc = mContent->GetComposedDoc();
+ mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
+
+ // Associate ::-moz-progress-bar pseudo-element to the anonymous child.
+ mBarDiv->SetPseudoElementType(PseudoStyleType::mozProgressBar);
+
+ // XXX(Bug 1631371) Check if this should use a fallible operation as it
+ // pretended earlier, or change the return type to void.
+ aElements.AppendElement(mBarDiv);
+
+ return NS_OK;
+}
+
+void nsProgressFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter) {
+ if (mBarDiv) {
+ aElements.AppendElement(mBarDiv);
+ }
+}
+
+NS_QUERYFRAME_HEAD(nsProgressFrame)
+ NS_QUERYFRAME_ENTRY(nsProgressFrame)
+ NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+void nsProgressFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) {
+ BuildDisplayListForInline(aBuilder, aLists);
+}
+
+void nsProgressFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
+ DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+ MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+ NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
+ NS_ASSERTION(
+ PrincipalChildList().GetLength() == 1 &&
+ PrincipalChildList().FirstChild() == mBarDiv->GetPrimaryFrame(),
+ "unexpected child frames");
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsProgressFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+
+ const auto wm = aReflowInput.GetWritingMode();
+ aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
+ aDesiredSize.SetOverflowAreasToDesiredBounds();
+
+ for (auto childFrame : PrincipalChildList()) {
+ ReflowChildFrame(childFrame, aPresContext, aReflowInput, aStatus);
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, childFrame);
+ }
+
+ FinishAndStoreOverflow(&aDesiredSize);
+
+ aStatus.Reset(); // This type of frame can't be split.
+}
+
+void nsProgressFrame::ReflowChildFrame(nsIFrame* aChild,
+ nsPresContext* aPresContext,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ bool vertical = ResolvedOrientationIsVertical();
+ WritingMode wm = aChild->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput reflowInput(aPresContext, aReflowInput, aChild, availSize);
+ nscoord size =
+ vertical ? aReflowInput.ComputedHeight() : aReflowInput.ComputedWidth();
+ nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
+ nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
+
+ double position = static_cast<HTMLProgressElement*>(GetContent())->Position();
+
+ // Force the bar's size to match the current progress.
+ // When indeterminate, the progress' size will be 100%.
+ if (position >= 0.0) {
+ size *= position;
+ }
+
+ if (!vertical && wm.IsPhysicalRTL()) {
+ xoffset += aReflowInput.ComputedWidth() - size;
+ }
+
+ // The bar size is fixed in these cases:
+ // - the progress position is determined: the bar size is fixed according
+ // to it's value.
+ // - the progress position is indeterminate and the bar appearance should be
+ // shown as native: the bar size is forced to 100%.
+ // Otherwise (when the progress is indeterminate and the bar appearance isn't
+ // native), the bar size isn't fixed and can be set by the author.
+ if (position != -1 || ShouldUseNativeStyle()) {
+ if (vertical) {
+ // We want the bar to begin at the bottom.
+ yoffset += aReflowInput.ComputedHeight() - size;
+
+ size -= reflowInput.ComputedPhysicalMargin().TopBottom() +
+ reflowInput.ComputedPhysicalBorderPadding().TopBottom();
+ size = std::max(size, 0);
+ reflowInput.SetComputedHeight(size);
+ } else {
+ size -= reflowInput.ComputedPhysicalMargin().LeftRight() +
+ reflowInput.ComputedPhysicalBorderPadding().LeftRight();
+ size = std::max(size, 0);
+ reflowInput.SetComputedWidth(size);
+ }
+ } else if (vertical) {
+ // For vertical progress bars, we need to position the bar specificly when
+ // the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
+ // because aReflowInput.ComputedHeight() - size == 0.
+ yoffset += aReflowInput.ComputedHeight() - reflowInput.ComputedHeight();
+ }
+
+ xoffset += reflowInput.ComputedPhysicalMargin().left;
+ yoffset += reflowInput.ComputedPhysicalMargin().top;
+
+ ReflowOutput barDesiredSize(aReflowInput);
+ ReflowChild(aChild, aPresContext, barDesiredSize, reflowInput, xoffset,
+ yoffset, ReflowChildFlags::Default, aStatus);
+ FinishReflowChild(aChild, aPresContext, barDesiredSize, &reflowInput, xoffset,
+ yoffset, ReflowChildFlags::Default);
+}
+
+nsresult nsProgressFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType) {
+ NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
+
+ if (aNameSpaceID == kNameSpaceID_None &&
+ (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max)) {
+ auto presShell = PresShell();
+ for (auto childFrame : PrincipalChildList()) {
+ presShell->FrameNeedsReflow(childFrame, IntrinsicDirty::None,
+ NS_FRAME_IS_DIRTY);
+ }
+ InvalidateFrame();
+ }
+
+ return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+LogicalSize nsProgressFrame::ComputeAutoSize(
+ gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
+ nscoord aAvailableISize, const LogicalSize& aMargin,
+ const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
+ ComputeSizeFlags aFlags) {
+ const WritingMode wm = GetWritingMode();
+ LogicalSize autoSize(wm);
+ autoSize.BSize(wm) = autoSize.ISize(wm) =
+ StyleFont()
+ ->mFont.size.ScaledBy(nsLayoutUtils::FontSizeInflationFor(this))
+ .ToAppUnits(); // 1em
+
+ if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
+ autoSize.ISize(wm) *= 10; // 10em
+ } else {
+ autoSize.BSize(wm) *= 10; // 10em
+ }
+
+ return autoSize.ConvertTo(aWM, wm);
+}
+
+nscoord nsProgressFrame::GetMinISize(gfxContext* aRenderingContext) {
+ RefPtr<nsFontMetrics> fontMet =
+ nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
+
+ nscoord minISize = fontMet->Font().size.ToAppUnits(); // 1em
+
+ if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
+ // The orientation is inline
+ minISize *= 10; // 10em
+ }
+
+ return minISize;
+}
+
+nscoord nsProgressFrame::GetPrefISize(gfxContext* aRenderingContext) {
+ return GetMinISize(aRenderingContext);
+}
+
+bool nsProgressFrame::ShouldUseNativeStyle() const {
+ nsIFrame* barFrame = PrincipalChildList().FirstChild();
+
+ // Use the native style if these conditions are satisfied:
+ // - both frames use the native appearance;
+ // - neither frame has author specified rules setting the border or the
+ // background.
+ return StyleDisplay()->EffectiveAppearance() ==
+ StyleAppearance::ProgressBar &&
+ !Style()->HasAuthorSpecifiedBorderOrBackground() && barFrame &&
+ barFrame->StyleDisplay()->EffectiveAppearance() ==
+ StyleAppearance::Progresschunk &&
+ !barFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
+}