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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
#include "nsHTMLButtonControlFrame.h"
#include "mozilla/Baseline.h"
#include "mozilla/PresShell.h"
#include "nsIFrameInlines.h"
#include "nsContainerFrame.h"
#include "nsPresContextInlines.h"
#include "nsPresContext.h"
#include "nsLayoutUtils.h"
#include "nsGkAtoms.h"
#include "nsDisplayList.h"
#include "nsCSSRendering.h"
#include <algorithm>
using namespace mozilla;
using namespace mozilla::image;
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);
// get all the styles
ServoStyleSet* styleSet = PresContext()->StyleSet();
// Get styles assigned to -moz-focus-inner (i.e. dotted border on Windows)
mInnerFocusStyle = styleSet->ProbePseudoElementStyle(
*mContent->AsElement(), PseudoStyleType::mozFocusInner, nullptr, Style());
}
NS_QUERYFRAME_HEAD(nsHTMLButtonControlFrame)
NS_QUERYFRAME_ENTRY(nsHTMLButtonControlFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
#ifdef ACCESSIBILITY
a11y::AccType nsHTMLButtonControlFrame::AccessibleType() {
return a11y::eHTMLButtonType;
}
#endif
nsresult nsHTMLButtonControlFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) {
if (mContent->AsElement()->IsDisabled()) {
// If disabled do nothing
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() const {
// FIXME(emilio): probably should account for per-axis clipping...
return StyleDisplay()->mOverflowX != StyleOverflow::Visible;
}
namespace mozilla {
class nsDisplayButtonForeground final : public nsPaintedDisplayItem {
public:
nsDisplayButtonForeground(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayButtonForeground);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayButtonForeground)
void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override;
NS_DISPLAY_DECL_NAME("ButtonForeground", TYPE_BUTTON_FOREGROUND)
};
void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
static_cast<nsHTMLButtonControlFrame*>(mFrame)->PaintInnerFocusBorder(
aBuilder, *aCtx, GetPaintRect(aBuilder, aCtx),
nsRect(ToReferenceFrame(), mFrame->GetSize()));
}
bool nsDisplayButtonForeground::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
bool borderIsEmpty = false;
bool dummy;
Maybe<nsCSSBorderRenderer> br =
static_cast<nsHTMLButtonControlFrame*>(mFrame)
->CreateInnerFocusBorderRenderer(
aDisplayListBuilder, nullptr,
GetBounds(aDisplayListBuilder, &dummy),
nsRect(ToReferenceFrame(), mFrame->GetSize()), &borderIsEmpty);
if (!br) {
return borderIsEmpty;
}
aBuilder.StartGroup(this);
br->CreateWebRenderCommands(this, aBuilder, aResources, aSc);
aBuilder.FinishGroup();
return true;
}
} // namespace mozilla
static nsRect GetButtonInnerFocusRect(const nsIFrame* aFrame,
const ComputedStyle& aFocusStyle,
const nsRect& aRect) {
nsRect result = aRect;
result.Deflate(aFrame->GetUsedBorderAndPadding());
nsMargin innerFocusPadding;
aFocusStyle.StylePadding()->GetPadding(innerFocusPadding);
nsMargin framePadding = aFrame->GetUsedPadding();
innerFocusPadding.top = std::min(innerFocusPadding.top, framePadding.top);
innerFocusPadding.right =
std::min(innerFocusPadding.right, framePadding.right);
innerFocusPadding.bottom =
std::min(innerFocusPadding.bottom, framePadding.bottom);
innerFocusPadding.left = std::min(innerFocusPadding.left, framePadding.left);
result.Inflate(innerFocusPadding);
return result;
}
void nsHTMLButtonControlFrame::PaintInnerFocusBorder(
nsDisplayListBuilder* aBuilder, gfxContext& aRenderingContext,
const nsRect& aDirtyRect, const nsRect& aRect) {
if (!mInnerFocusStyle) {
return;
}
// we draw the -moz-focus-inner border just inside the button's
// normal border and padding, to match Windows themes.
PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
? PaintBorderFlags::SyncDecodeImages
: PaintBorderFlags();
nsRect rect = GetButtonInnerFocusRect(this, *mInnerFocusStyle, aRect);
// We don't paint border images here, so the ImgDrawResult is useless.
Unused << nsCSSRendering::PaintBorder(PresContext(), aRenderingContext, this,
aDirtyRect, rect, mInnerFocusStyle,
flags);
}
Maybe<nsCSSBorderRenderer>
nsHTMLButtonControlFrame::CreateInnerFocusBorderRenderer(
nsDisplayListBuilder* aBuilder, gfxContext* aRenderingContext,
const nsRect& aDirtyRect, const nsRect& aRect, bool* aBorderIsEmpty) {
if (!mInnerFocusStyle) {
return Nothing();
}
nsRect rect = GetButtonInnerFocusRect(this, *mInnerFocusStyle, aRect);
gfx::DrawTarget* dt =
aRenderingContext ? aRenderingContext->GetDrawTarget() : nullptr;
return nsCSSRendering::CreateBorderRenderer(PresContext(), dt, this,
aDirtyRect, rect,
mInnerFocusStyle, aBorderIsEmpty);
}
void nsHTMLButtonControlFrame::BuildDisplayList(
nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) {
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);
}
DisplayBorderBackgroundOutline(aBuilder, aLists);
}
{
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
if (ShouldClipPaintingToBorderBox()) {
nsMargin border = StyleBorder()->GetComputedBorder();
nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
rect.Deflate(border);
nscoord radii[8];
const bool hasRadii = GetPaddingBoxBorderRadii(radii);
clipState.ClipContainingBlockDescendants(rect,
hasRadii ? radii : nullptr);
}
BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aLists,
DisplayChildFlag::ForcePseudoStackingContext);
}
// Put the foreground outline on top of the children.
if (IsVisibleForPainting() && mInnerFocusStyle &&
mInnerFocusStyle->StyleBorder()->HasBorder() && IsThemed() &&
PresContext()->Theme()->ThemeWantsButtonInnerFocusRing()) {
aLists.Content()->AppendNewToTop<nsDisplayButtonForeground>(aBuilder, this);
}
// To draw border when selected in editor
DisplaySelectionOverlay(aBuilder, aLists.Content());
}
nscoord nsHTMLButtonControlFrame::IntrinsicISize(
const IntrinsicSizeInput& aInput, IntrinsicISizeType aType) {
if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
return *containISize;
}
return nsLayoutUtils::IntrinsicForContainer(
aInput.mContext, mFrames.FirstChild(), aType,
aInput.mPercentageBasisForChildren);
}
void nsHTMLButtonControlFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsHTMLButtonControlFrame");
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 contents'
// bSize.
// If we have size containment in block axis, ignore the contents and use
// contain-intrinsic-block-size. The combobox content size with no content
// is one line-height, not zero.
const Maybe<nscoord> containBSize = ContainIntrinsicBSize(
IsComboboxControlFrame() ? aButtonReflowInput.GetLineHeight() : 0);
const nscoord bSize = containBSize.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);
}
ComputedStyle* nsHTMLButtonControlFrame::GetAdditionalComputedStyle(
int32_t aIndex) const {
if (aIndex == 0) {
return mInnerFocusStyle;
}
return nullptr;
}
void nsHTMLButtonControlFrame::SetAdditionalComputedStyle(
int32_t aIndex, ComputedStyle* aComputedStyle) {
if (aIndex == 0) {
mInnerFocusStyle = 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