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-rw-r--r--layout/forms/nsMeterFrame.cpp222
1 files changed, 222 insertions, 0 deletions
diff --git a/layout/forms/nsMeterFrame.cpp b/layout/forms/nsMeterFrame.cpp
new file mode 100644
index 0000000000..76e569226c
--- /dev/null
+++ b/layout/forms/nsMeterFrame.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 "nsMeterFrame.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLMeterElement.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 mozilla::dom::Document;
+using mozilla::dom::Element;
+using mozilla::dom::HTMLMeterElement;
+
+nsIFrame* NS_NewMeterFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+ return new (aPresShell) nsMeterFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
+
+nsMeterFrame::nsMeterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+ : nsContainerFrame(aStyle, aPresContext, kClassID), mBarDiv(nullptr) {}
+
+nsMeterFrame::~nsMeterFrame() = default;
+
+void nsMeterFrame::Destroy(DestroyContext& aContext) {
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsMeterFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+ aContext.AddAnonymousContent(mBarDiv.forget());
+ nsContainerFrame::Destroy(aContext);
+}
+
+nsresult nsMeterFrame::CreateAnonymousContent(
+ nsTArray<ContentInfo>& aElements) {
+ // Get the NodeInfoManager and tag necessary to create the meter bar div.
+ nsCOMPtr<Document> doc = mContent->GetComposedDoc();
+
+ // Create the div.
+ mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
+
+ // Associate ::-moz-meter-bar pseudo-element to the anonymous child.
+ mBarDiv->SetPseudoElementType(PseudoStyleType::mozMeterBar);
+
+ aElements.AppendElement(mBarDiv);
+
+ return NS_OK;
+}
+
+void nsMeterFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter) {
+ if (mBarDiv) {
+ aElements.AppendElement(mBarDiv);
+ }
+}
+
+NS_QUERYFRAME_HEAD(nsMeterFrame)
+ NS_QUERYFRAME_ENTRY(nsMeterFrame)
+ NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+void nsMeterFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
+ DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+ MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+ NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsMeterFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+ NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
+
+ ReflowBarFrame(barFrame, aPresContext, aReflowInput, aStatus);
+
+ const auto wm = aReflowInput.GetWritingMode();
+ aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
+
+ aDesiredSize.SetOverflowAreasToDesiredBounds();
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
+ FinishAndStoreOverflow(&aDesiredSize);
+
+ aStatus.Reset(); // This type of frame can't be split.
+}
+
+void nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
+ nsPresContext* aPresContext,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ bool vertical = ResolvedOrientationIsVertical();
+ WritingMode wm = aBarFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput reflowInput(aPresContext, aReflowInput, aBarFrame, availSize);
+ nscoord size =
+ vertical ? aReflowInput.ComputedHeight() : aReflowInput.ComputedWidth();
+ nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
+ nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
+
+ auto* meterElement = static_cast<HTMLMeterElement*>(GetContent());
+ size = NSToCoordRound(size * meterElement->Position());
+
+ if (!vertical && wm.IsPhysicalRTL()) {
+ xoffset += aReflowInput.ComputedWidth() - size;
+ }
+
+ // The bar position is *always* constrained.
+ 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);
+ }
+
+ xoffset += reflowInput.ComputedPhysicalMargin().left;
+ yoffset += reflowInput.ComputedPhysicalMargin().top;
+
+ ReflowOutput barDesiredSize(reflowInput);
+ ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowInput, xoffset,
+ yoffset, ReflowChildFlags::Default, aStatus);
+ FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowInput,
+ xoffset, yoffset, ReflowChildFlags::Default);
+}
+
+nsresult nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute, int32_t aModType) {
+ NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
+
+ if (aNameSpaceID == kNameSpaceID_None &&
+ (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max ||
+ aAttribute == nsGkAtoms::min)) {
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+ NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
+ PresShell()->FrameNeedsReflow(barFrame, IntrinsicDirty::None,
+ NS_FRAME_IS_DIRTY);
+ InvalidateFrame();
+ }
+
+ return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+LogicalSize nsMeterFrame::ComputeAutoSize(
+ gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
+ nscoord aAvailableISize, const LogicalSize& aMargin,
+ const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
+ ComputeSizeFlags aFlags) {
+ RefPtr<nsFontMetrics> fontMet =
+ nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
+
+ const WritingMode wm = GetWritingMode();
+ LogicalSize autoSize(wm);
+ autoSize.BSize(wm) = autoSize.ISize(wm) =
+ fontMet->Font().size.ToAppUnits(); // 1em
+
+ if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
+ autoSize.ISize(wm) *= 5; // 5em
+ } else {
+ autoSize.BSize(wm) *= 5; // 5em
+ }
+
+ return autoSize.ConvertTo(aWM, wm);
+}
+
+nscoord nsMeterFrame::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 *= 5; // 5em
+ }
+
+ return minISize;
+}
+
+nscoord nsMeterFrame::GetPrefISize(gfxContext* aRenderingContext) {
+ return GetMinISize(aRenderingContext);
+}
+
+bool nsMeterFrame::ShouldUseNativeStyle() const {
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+
+ // 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::Meter &&
+ !Style()->HasAuthorSpecifiedBorderOrBackground() && barFrame &&
+ barFrame->StyleDisplay()->EffectiveAppearance() ==
+ StyleAppearance::Meterchunk &&
+ !barFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
+}