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diff --git a/layout/forms/nsHTMLButtonControlFrame.cpp b/layout/forms/nsHTMLButtonControlFrame.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 "nsHTMLButtonControlFrame.h"
+
+#include "mozilla/Baseline.h"
+#include "mozilla/PresShell.h"
+#include "nsIFrameInlines.h"
+#include "nsContainerFrame.h"
+#include "nsIFormControlFrame.h"
+#include "nsPresContext.h"
+#include "nsLayoutUtils.h"
+#include "nsGkAtoms.h"
+#include "nsButtonFrameRenderer.h"
+#include "nsDisplayList.h"
+#include <algorithm>
+
+using namespace mozilla;
+
+nsContainerFrame* NS_NewHTMLButtonControlFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsHTMLButtonControlFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsHTMLButtonControlFrame)
+
+nsHTMLButtonControlFrame::nsHTMLButtonControlFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext,
+ nsIFrame::ClassID aID)
+ : nsContainerFrame(aStyle, aPresContext, aID) {}
+
+nsHTMLButtonControlFrame::~nsHTMLButtonControlFrame() = default;
+
+void nsHTMLButtonControlFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) {
+ nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
+ mRenderer.SetFrame(this, PresContext());
+}
+
+NS_QUERYFRAME_HEAD(nsHTMLButtonControlFrame)
+ NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsHTMLButtonControlFrame::AccessibleType() {
+ return a11y::eHTMLButtonType;
+}
+#endif
+
+void nsHTMLButtonControlFrame::SetFocus(bool aOn, bool aRepaint) {}
+
+nsresult nsHTMLButtonControlFrame::HandleEvent(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) {
+ // if disabled do nothing
+ if (mRenderer.isDisabled()) {
+ return NS_OK;
+ }
+
+ // mouse clicks are handled by content
+ // we don't want our children to get any events. So just pass it to frame.
+ return nsIFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
+}
+
+bool nsHTMLButtonControlFrame::ShouldClipPaintingToBorderBox() {
+ // FIXME(emilio): probably should account for per-axis clipping...
+ return StyleDisplay()->mOverflowX != StyleOverflow::Visible;
+}
+
+void nsHTMLButtonControlFrame::BuildDisplayList(
+ nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) {
+ nsDisplayList onTop(aBuilder);
+ if (IsVisibleForPainting()) {
+ // Clip the button itself to its border area for event hit testing.
+ Maybe<DisplayListClipState::AutoSaveRestore> eventClipState;
+ if (aBuilder->IsForEventDelivery()) {
+ eventClipState.emplace(aBuilder);
+ nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
+ nscoord radii[8];
+ bool hasRadii = GetBorderRadii(radii);
+ eventClipState->ClipContainingBlockDescendants(
+ rect, hasRadii ? radii : nullptr);
+ }
+
+ mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
+ }
+
+ nsDisplayListCollection set(aBuilder);
+
+ {
+ DisplayListClipState::AutoSaveRestore clipState(aBuilder);
+
+ if (ShouldClipPaintingToBorderBox()) {
+ nsMargin border = StyleBorder()->GetComputedBorder();
+ nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
+ rect.Deflate(border);
+ nscoord radii[8];
+ bool hasRadii = GetPaddingBoxBorderRadii(radii);
+ clipState.ClipContainingBlockDescendants(rect,
+ hasRadii ? radii : nullptr);
+ }
+
+ BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), set,
+ DisplayChildFlag::ForcePseudoStackingContext);
+ }
+
+ // Put the foreground outline and focus rects on top of the children
+ set.Content()->AppendToTop(&onTop);
+ set.MoveTo(aLists);
+
+ DisplayOutline(aBuilder, aLists);
+
+ // to draw border when selected in editor
+ DisplaySelectionOverlay(aBuilder, aLists.Content());
+}
+
+nscoord nsHTMLButtonControlFrame::GetMinISize(gfxContext* aRenderingContext) {
+ nscoord result;
+ DISPLAY_MIN_INLINE_SIZE(this, result);
+ if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
+ result = *containISize;
+ } else {
+ nsIFrame* kid = mFrames.FirstChild();
+ result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, kid,
+ IntrinsicISizeType::MinISize);
+ }
+ return result;
+}
+
+nscoord nsHTMLButtonControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
+ nscoord result;
+ DISPLAY_PREF_INLINE_SIZE(this, result);
+ if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
+ result = *containISize;
+ } else {
+ nsIFrame* kid = mFrames.FirstChild();
+ result = nsLayoutUtils::IntrinsicForContainer(
+ aRenderingContext, kid, IntrinsicISizeType::PrefISize);
+ }
+ return result;
+}
+
+void nsHTMLButtonControlFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsHTMLButtonControlFrame");
+ DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+ MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+ // Reflow the child
+ nsIFrame* firstKid = mFrames.FirstChild();
+
+ MOZ_ASSERT(firstKid, "Button should have a child frame for its contents");
+ MOZ_ASSERT(!firstKid->GetNextSibling(),
+ "Button should have exactly one child frame");
+ MOZ_ASSERT(
+ firstKid->Style()->GetPseudoType() == PseudoStyleType::buttonContent,
+ "Button's child frame has unexpected pseudo type!");
+
+ // XXXbz Eventually we may want to check-and-bail if
+ // !aReflowInput.ShouldReflowAllKids() &&
+ // !firstKid->IsSubtreeDirty().
+ // We'd need to cache our ascent for that, of course.
+
+ // Reflow the contents of the button.
+ // (This populates our aDesiredSize, too.)
+ ReflowButtonContents(aPresContext, aDesiredSize, aReflowInput, firstKid);
+
+ if (!ShouldClipPaintingToBorderBox()) {
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, firstKid);
+ }
+ // else, we ignore child overflow -- anything that overflows beyond our
+ // own border-box will get clipped when painting.
+
+ FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput,
+ aStatus);
+
+ // We're always complete and we don't support overflow containers
+ // so we shouldn't have a next-in-flow ever.
+ aStatus.Reset();
+ MOZ_ASSERT(!GetNextInFlow());
+}
+
+void nsHTMLButtonControlFrame::ReflowButtonContents(
+ nsPresContext* aPresContext, ReflowOutput& aButtonDesiredSize,
+ const ReflowInput& aButtonReflowInput, nsIFrame* aFirstKid) {
+ WritingMode wm = GetWritingMode();
+ LogicalSize availSize = aButtonReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+
+ // shorthand for a value we need to use in a bunch of places
+ const LogicalMargin& clbp =
+ aButtonReflowInput.ComputedLogicalBorderPadding(wm);
+
+ LogicalPoint childPos(wm);
+ childPos.I(wm) = clbp.IStart(wm);
+ availSize.ISize(wm) = std::max(availSize.ISize(wm), 0);
+
+ ReflowInput contentsReflowInput(aPresContext, aButtonReflowInput, aFirstKid,
+ availSize);
+
+ nsReflowStatus contentsReflowStatus;
+ ReflowOutput contentsDesiredSize(aButtonReflowInput);
+ childPos.B(wm) = 0; // This will be set properly later, after reflowing the
+ // child to determine its size.
+
+ if (aFirstKid->IsFlexOrGridContainer()) {
+ // XXX: Should we use ResetResizeFlags::Yes?
+ contentsReflowInput.SetComputedBSize(aButtonReflowInput.ComputedBSize(),
+ ReflowInput::ResetResizeFlags::No);
+ contentsReflowInput.SetComputedMinBSize(
+ aButtonReflowInput.ComputedMinBSize());
+ contentsReflowInput.SetComputedMaxBSize(
+ aButtonReflowInput.ComputedMaxBSize());
+ }
+
+ // We just pass a dummy containerSize here, as the child will be
+ // repositioned later by FinishReflowChild.
+ nsSize dummyContainerSize;
+ ReflowChild(aFirstKid, aPresContext, contentsDesiredSize, contentsReflowInput,
+ wm, childPos, dummyContainerSize, ReflowChildFlags::Default,
+ contentsReflowStatus);
+ MOZ_ASSERT(contentsReflowStatus.IsComplete(),
+ "We gave button-contents frame unconstrained available height, "
+ "so it should be complete");
+
+ // Compute the button's content-box size:
+ LogicalSize buttonContentBox(wm);
+ if (aButtonReflowInput.ComputedBSize() != NS_UNCONSTRAINEDSIZE) {
+ // Button has a fixed block-size -- that's its content-box bSize.
+ buttonContentBox.BSize(wm) = aButtonReflowInput.ComputedBSize();
+ } else {
+ // Button is intrinsically sized -- it should shrinkwrap the
+ // button-contents' bSize. But if it has size containment in block axis,
+ // ignore the contents and use contain-intrinsic-block-size.
+ nscoord bSize = aButtonReflowInput.mFrame->ContainIntrinsicBSize().valueOr(
+ contentsDesiredSize.BSize(wm));
+
+ // Make sure we obey min/max-bSize in the case when we're doing intrinsic
+ // sizing (we get it for free when we have a non-intrinsic
+ // aButtonReflowInput.ComputedBSize()). Note that we do this before
+ // adjusting for borderpadding, since mComputedMaxBSize and
+ // mComputedMinBSize are content bSizes.
+ buttonContentBox.BSize(wm) = aButtonReflowInput.ApplyMinMaxBSize(bSize);
+ }
+ if (aButtonReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE) {
+ buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedISize();
+ } else {
+ nscoord iSize = aButtonReflowInput.mFrame->ContainIntrinsicISize().valueOr(
+ contentsDesiredSize.ISize(wm));
+ buttonContentBox.ISize(wm) = aButtonReflowInput.ApplyMinMaxISize(iSize);
+ }
+
+ // Center child in the block-direction in the button
+ // (technically, inside of the button's focus-padding area)
+ nscoord extraSpace =
+ buttonContentBox.BSize(wm) - contentsDesiredSize.BSize(wm);
+
+ childPos.B(wm) = std::max(0, extraSpace / 2);
+
+ // Adjust childPos.B() to be in terms of the button's frame-rect:
+ childPos.B(wm) += clbp.BStart(wm);
+
+ nsSize containerSize = (buttonContentBox + clbp.Size(wm)).GetPhysicalSize(wm);
+
+ // Place the child
+ FinishReflowChild(aFirstKid, aPresContext, contentsDesiredSize,
+ &contentsReflowInput, wm, childPos, containerSize,
+ ReflowChildFlags::Default);
+
+ // Make sure we have a useful 'ascent' value for the child
+ if (contentsDesiredSize.BlockStartAscent() ==
+ ReflowOutput::ASK_FOR_BASELINE) {
+ WritingMode wm = aButtonReflowInput.GetWritingMode();
+ contentsDesiredSize.SetBlockStartAscent(aFirstKid->GetLogicalBaseline(wm));
+ }
+
+ // OK, we're done with the child frame.
+ // Use what we learned to populate the button frame's reflow metrics.
+ // * Button's height & width are content-box size + border-box contribution:
+ aButtonDesiredSize.SetSize(
+ wm,
+ LogicalSize(wm, aButtonReflowInput.ComputedISize() + clbp.IStartEnd(wm),
+ buttonContentBox.BSize(wm) + clbp.BStartEnd(wm)));
+
+ // * Button's ascent is its child's ascent, plus the child's block-offset
+ // within our frame... unless it's orthogonal, in which case we'll use the
+ // contents inline-size as an approximation for now.
+ // XXX is there a better strategy? should we include border-padding?
+ if (!aButtonReflowInput.mStyleDisplay->IsContainLayout()) {
+ if (aButtonDesiredSize.GetWritingMode().IsOrthogonalTo(wm)) {
+ aButtonDesiredSize.SetBlockStartAscent(
+ wm.IsAlphabeticalBaseline() ? contentsDesiredSize.ISize(wm)
+ : contentsDesiredSize.ISize(wm) / 2);
+ } else {
+ aButtonDesiredSize.SetBlockStartAscent(
+ contentsDesiredSize.BlockStartAscent() + childPos.B(wm));
+ }
+ } // else: we're layout-contained, and so we have no baseline.
+
+ aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
+}
+
+Maybe<nscoord> nsHTMLButtonControlFrame::GetNaturalBaselineBOffset(
+ WritingMode aWM, BaselineSharingGroup aBaselineGroup,
+ BaselineExportContext aExportContext) const {
+ if (StyleDisplay()->IsContainLayout()) {
+ return Nothing{};
+ }
+
+ nsIFrame* inner = mFrames.FirstChild();
+ if (MOZ_UNLIKELY(inner->GetWritingMode().IsOrthogonalTo(aWM))) {
+ return Nothing{};
+ }
+ auto result =
+ inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aExportContext)
+ .valueOrFrom([inner, aWM, aBaselineGroup]() {
+ return Baseline::SynthesizeBOffsetFromBorderBox(inner, aWM,
+ aBaselineGroup);
+ });
+
+ nscoord innerBStart = inner->BStart(aWM, GetSize());
+ if (aBaselineGroup == BaselineSharingGroup::First) {
+ return Some(result + innerBStart);
+ }
+ return Some(result + BSize(aWM) - (innerBStart + inner->BSize(aWM)));
+}
+
+BaselineSharingGroup nsHTMLButtonControlFrame::GetDefaultBaselineSharingGroup()
+ const {
+ nsIFrame* firstKid = mFrames.FirstChild();
+
+ MOZ_ASSERT(firstKid, "Button should have a child frame for its contents");
+ MOZ_ASSERT(!firstKid->GetNextSibling(),
+ "Button should have exactly one child frame");
+ return firstKid->GetDefaultBaselineSharingGroup();
+}
+
+nscoord nsHTMLButtonControlFrame::SynthesizeFallbackBaseline(
+ mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup) const {
+ return Baseline::SynthesizeBOffsetFromMarginBox(this, aWM, aBaselineGroup);
+}
+
+nsresult nsHTMLButtonControlFrame::SetFormProperty(nsAtom* aName,
+ const nsAString& aValue) {
+ if (nsGkAtoms::value == aName) {
+ return mContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
+ aValue, true);
+ }
+ return NS_OK;
+}
+
+ComputedStyle* nsHTMLButtonControlFrame::GetAdditionalComputedStyle(
+ int32_t aIndex) const {
+ return mRenderer.GetComputedStyle(aIndex);
+}
+
+void nsHTMLButtonControlFrame::SetAdditionalComputedStyle(
+ int32_t aIndex, ComputedStyle* aComputedStyle) {
+ mRenderer.SetComputedStyle(aIndex, aComputedStyle);
+}
+
+void nsHTMLButtonControlFrame::AppendDirectlyOwnedAnonBoxes(
+ nsTArray<OwnedAnonBox>& aResult) {
+ MOZ_ASSERT(mFrames.FirstChild(), "Must have our button-content anon box");
+ MOZ_ASSERT(!mFrames.FirstChild()->GetNextSibling(),
+ "Must only have our button-content anon box");
+ aResult.AppendElement(OwnedAnonBox(mFrames.FirstChild()));
+}
+
+#ifdef DEBUG
+void nsHTMLButtonControlFrame::AppendFrames(ChildListID aListID,
+ nsFrameList&& aFrameList) {
+ MOZ_CRASH("unsupported operation");
+}
+
+void nsHTMLButtonControlFrame::InsertFrames(
+ ChildListID aListID, nsIFrame* aPrevFrame,
+ const nsLineList::iterator* aPrevFrameLine, nsFrameList&& aFrameList) {
+ MOZ_CRASH("unsupported operation");
+}
+
+void nsHTMLButtonControlFrame::RemoveFrame(DestroyContext&, ChildListID,
+ nsIFrame*) {
+ MOZ_CRASH("unsupported operation");
+}
+#endif