forked from mirrors/gecko-dev
b518ef30fa
It is used in `Reflow()` implementations. Differential Revision: https://phabricator.services.mozilla.com/D206317
510 lines
20 KiB
C++
510 lines
20 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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#include "nsHTMLButtonControlFrame.h"
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#include "mozilla/Baseline.h"
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#include "mozilla/PresShell.h"
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#include "nsIFrameInlines.h"
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#include "nsContainerFrame.h"
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#include "nsPresContextInlines.h"
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#include "nsIFormControlFrame.h"
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#include "nsPresContext.h"
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#include "nsLayoutUtils.h"
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#include "nsGkAtoms.h"
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#include "nsDisplayList.h"
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#include "nsCSSRendering.h"
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#include <algorithm>
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using namespace mozilla;
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using namespace mozilla::image;
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nsContainerFrame* NS_NewHTMLButtonControlFrame(PresShell* aPresShell,
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ComputedStyle* aStyle) {
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return new (aPresShell)
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nsHTMLButtonControlFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsHTMLButtonControlFrame)
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nsHTMLButtonControlFrame::nsHTMLButtonControlFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext,
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nsIFrame::ClassID aID)
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: nsContainerFrame(aStyle, aPresContext, aID) {}
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nsHTMLButtonControlFrame::~nsHTMLButtonControlFrame() = default;
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void nsHTMLButtonControlFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) {
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nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
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// get all the styles
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ServoStyleSet* styleSet = PresContext()->StyleSet();
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// Get styles assigned to -moz-focus-inner (i.e. dotted border on Windows)
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mInnerFocusStyle = styleSet->ProbePseudoElementStyle(
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*mContent->AsElement(), PseudoStyleType::mozFocusInner, nullptr, Style());
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}
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NS_QUERYFRAME_HEAD(nsHTMLButtonControlFrame)
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NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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#ifdef ACCESSIBILITY
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a11y::AccType nsHTMLButtonControlFrame::AccessibleType() {
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return a11y::eHTMLButtonType;
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}
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#endif
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void nsHTMLButtonControlFrame::SetFocus(bool aOn, bool aRepaint) {}
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nsresult nsHTMLButtonControlFrame::HandleEvent(nsPresContext* aPresContext,
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WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) {
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if (mContent->AsElement()->IsDisabled()) {
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// If disabled do nothing
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return NS_OK;
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}
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// mouse clicks are handled by content
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// we don't want our children to get any events. So just pass it to frame.
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return nsIFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
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}
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bool nsHTMLButtonControlFrame::ShouldClipPaintingToBorderBox() const {
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// FIXME(emilio): probably should account for per-axis clipping...
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return StyleDisplay()->mOverflowX != StyleOverflow::Visible;
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}
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namespace mozilla {
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class nsDisplayButtonForeground final : public nsPaintedDisplayItem {
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public:
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nsDisplayButtonForeground(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
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: nsPaintedDisplayItem(aBuilder, aFrame) {
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MOZ_COUNT_CTOR(nsDisplayButtonForeground);
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}
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MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayButtonForeground)
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void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
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bool CreateWebRenderCommands(
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mozilla::wr::DisplayListBuilder& aBuilder,
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mozilla::wr::IpcResourceUpdateQueue& aResources,
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const StackingContextHelper& aSc,
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mozilla::layers::RenderRootStateManager* aManager,
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nsDisplayListBuilder* aDisplayListBuilder) override;
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NS_DISPLAY_DECL_NAME("ButtonForeground", TYPE_BUTTON_FOREGROUND)
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};
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void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
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gfxContext* aCtx) {
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static_cast<nsHTMLButtonControlFrame*>(mFrame)->PaintInnerFocusBorder(
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aBuilder, *aCtx, GetPaintRect(aBuilder, aCtx),
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nsRect(ToReferenceFrame(), mFrame->GetSize()));
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}
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bool nsDisplayButtonForeground::CreateWebRenderCommands(
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mozilla::wr::DisplayListBuilder& aBuilder,
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mozilla::wr::IpcResourceUpdateQueue& aResources,
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const StackingContextHelper& aSc,
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mozilla::layers::RenderRootStateManager* aManager,
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nsDisplayListBuilder* aDisplayListBuilder) {
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bool borderIsEmpty = false;
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bool dummy;
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Maybe<nsCSSBorderRenderer> br =
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static_cast<nsHTMLButtonControlFrame*>(mFrame)
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->CreateInnerFocusBorderRenderer(
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aDisplayListBuilder, nullptr,
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GetBounds(aDisplayListBuilder, &dummy),
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nsRect(ToReferenceFrame(), mFrame->GetSize()), &borderIsEmpty);
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if (!br) {
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return borderIsEmpty;
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}
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aBuilder.StartGroup(this);
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br->CreateWebRenderCommands(this, aBuilder, aResources, aSc);
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aBuilder.FinishGroup();
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return true;
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}
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} // namespace mozilla
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static nsRect GetButtonInnerFocusRect(const nsIFrame* aFrame,
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const ComputedStyle& aFocusStyle,
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const nsRect& aRect) {
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nsRect result = aRect;
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result.Deflate(aFrame->GetUsedBorderAndPadding());
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nsMargin innerFocusPadding;
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aFocusStyle.StylePadding()->GetPadding(innerFocusPadding);
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nsMargin framePadding = aFrame->GetUsedPadding();
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innerFocusPadding.top = std::min(innerFocusPadding.top, framePadding.top);
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innerFocusPadding.right =
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std::min(innerFocusPadding.right, framePadding.right);
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innerFocusPadding.bottom =
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std::min(innerFocusPadding.bottom, framePadding.bottom);
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innerFocusPadding.left = std::min(innerFocusPadding.left, framePadding.left);
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result.Inflate(innerFocusPadding);
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return result;
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}
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void nsHTMLButtonControlFrame::PaintInnerFocusBorder(
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nsDisplayListBuilder* aBuilder, gfxContext& aRenderingContext,
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const nsRect& aDirtyRect, const nsRect& aRect) {
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if (!mInnerFocusStyle) {
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return;
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}
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// we draw the -moz-focus-inner border just inside the button's
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// normal border and padding, to match Windows themes.
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PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
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? PaintBorderFlags::SyncDecodeImages
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: PaintBorderFlags();
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nsRect rect = GetButtonInnerFocusRect(this, *mInnerFocusStyle, aRect);
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// We don't paint border images here, so the ImgDrawResult is useless.
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Unused << nsCSSRendering::PaintBorder(PresContext(), aRenderingContext, this,
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aDirtyRect, rect, mInnerFocusStyle,
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flags);
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}
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Maybe<nsCSSBorderRenderer>
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nsHTMLButtonControlFrame::CreateInnerFocusBorderRenderer(
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nsDisplayListBuilder* aBuilder, gfxContext* aRenderingContext,
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const nsRect& aDirtyRect, const nsRect& aRect, bool* aBorderIsEmpty) {
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if (!mInnerFocusStyle) {
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return Nothing();
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}
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nsRect rect = GetButtonInnerFocusRect(this, *mInnerFocusStyle, aRect);
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gfx::DrawTarget* dt =
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aRenderingContext ? aRenderingContext->GetDrawTarget() : nullptr;
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return nsCSSRendering::CreateBorderRenderer(PresContext(), dt, this,
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aDirtyRect, rect,
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mInnerFocusStyle, aBorderIsEmpty);
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}
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void nsHTMLButtonControlFrame::BuildDisplayList(
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nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) {
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if (IsVisibleForPainting()) {
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// Clip the button itself to its border area for event hit testing.
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Maybe<DisplayListClipState::AutoSaveRestore> eventClipState;
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if (aBuilder->IsForEventDelivery()) {
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eventClipState.emplace(aBuilder);
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nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
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nscoord radii[8];
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bool hasRadii = GetBorderRadii(radii);
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eventClipState->ClipContainingBlockDescendants(
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rect, hasRadii ? radii : nullptr);
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}
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DisplayBorderBackgroundOutline(aBuilder, aLists);
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}
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{
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DisplayListClipState::AutoSaveRestore clipState(aBuilder);
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if (ShouldClipPaintingToBorderBox()) {
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nsMargin border = StyleBorder()->GetComputedBorder();
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nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
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rect.Deflate(border);
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nscoord radii[8];
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const bool hasRadii = GetPaddingBoxBorderRadii(radii);
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clipState.ClipContainingBlockDescendants(rect,
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hasRadii ? radii : nullptr);
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}
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BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aLists,
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DisplayChildFlag::ForcePseudoStackingContext);
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}
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// Put the foreground outline on top of the children.
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if (IsVisibleForPainting() && mInnerFocusStyle &&
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mInnerFocusStyle->StyleBorder()->HasBorder() && IsThemed() &&
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PresContext()->Theme()->ThemeWantsButtonInnerFocusRing()) {
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aLists.Content()->AppendNewToTop<nsDisplayButtonForeground>(aBuilder, this);
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}
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// To draw border when selected in editor
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DisplaySelectionOverlay(aBuilder, aLists.Content());
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}
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nscoord nsHTMLButtonControlFrame::GetMinISize(gfxContext* aRenderingContext) {
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if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
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return *containISize;
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}
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nsIFrame* kid = mFrames.FirstChild();
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return nsLayoutUtils::IntrinsicForContainer(aRenderingContext, kid,
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IntrinsicISizeType::MinISize);
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}
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nscoord nsHTMLButtonControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
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if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
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return *containISize;
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}
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nsIFrame* kid = mFrames.FirstChild();
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return nsLayoutUtils::IntrinsicForContainer(aRenderingContext, kid,
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IntrinsicISizeType::PrefISize);
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}
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void nsHTMLButtonControlFrame::Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) {
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MarkInReflow();
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DO_GLOBAL_REFLOW_COUNT("nsHTMLButtonControlFrame");
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MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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// Reflow the child
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nsIFrame* firstKid = mFrames.FirstChild();
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MOZ_ASSERT(firstKid, "Button should have a child frame for its contents");
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MOZ_ASSERT(!firstKid->GetNextSibling(),
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"Button should have exactly one child frame");
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MOZ_ASSERT(
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firstKid->Style()->GetPseudoType() == PseudoStyleType::buttonContent,
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"Button's child frame has unexpected pseudo type!");
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// XXXbz Eventually we may want to check-and-bail if
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// !aReflowInput.ShouldReflowAllKids() &&
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// !firstKid->IsSubtreeDirty().
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// We'd need to cache our ascent for that, of course.
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// Reflow the contents of the button.
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// (This populates our aDesiredSize, too.)
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ReflowButtonContents(aPresContext, aDesiredSize, aReflowInput, firstKid);
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if (!ShouldClipPaintingToBorderBox()) {
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ConsiderChildOverflow(aDesiredSize.mOverflowAreas, firstKid);
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}
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// else, we ignore child overflow -- anything that overflows beyond our
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// own border-box will get clipped when painting.
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FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput,
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aStatus);
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// We're always complete and we don't support overflow containers
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// so we shouldn't have a next-in-flow ever.
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aStatus.Reset();
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MOZ_ASSERT(!GetNextInFlow());
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}
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void nsHTMLButtonControlFrame::ReflowButtonContents(
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nsPresContext* aPresContext, ReflowOutput& aButtonDesiredSize,
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const ReflowInput& aButtonReflowInput, nsIFrame* aFirstKid) {
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WritingMode wm = GetWritingMode();
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LogicalSize availSize = aButtonReflowInput.ComputedSize(wm);
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availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
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// shorthand for a value we need to use in a bunch of places
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const LogicalMargin& clbp =
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aButtonReflowInput.ComputedLogicalBorderPadding(wm);
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LogicalPoint childPos(wm);
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childPos.I(wm) = clbp.IStart(wm);
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availSize.ISize(wm) = std::max(availSize.ISize(wm), 0);
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ReflowInput contentsReflowInput(aPresContext, aButtonReflowInput, aFirstKid,
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availSize);
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nsReflowStatus contentsReflowStatus;
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ReflowOutput contentsDesiredSize(aButtonReflowInput);
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childPos.B(wm) = 0; // This will be set properly later, after reflowing the
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// child to determine its size.
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if (aFirstKid->IsFlexOrGridContainer()) {
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// XXX: Should we use ResetResizeFlags::Yes?
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contentsReflowInput.SetComputedBSize(aButtonReflowInput.ComputedBSize(),
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ReflowInput::ResetResizeFlags::No);
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contentsReflowInput.SetComputedMinBSize(
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aButtonReflowInput.ComputedMinBSize());
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contentsReflowInput.SetComputedMaxBSize(
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aButtonReflowInput.ComputedMaxBSize());
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}
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// We just pass a dummy containerSize here, as the child will be
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// repositioned later by FinishReflowChild.
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nsSize dummyContainerSize;
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ReflowChild(aFirstKid, aPresContext, contentsDesiredSize, contentsReflowInput,
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wm, childPos, dummyContainerSize, ReflowChildFlags::Default,
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contentsReflowStatus);
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MOZ_ASSERT(contentsReflowStatus.IsComplete(),
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"We gave button-contents frame unconstrained available height, "
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"so it should be complete");
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// Compute the button's content-box size:
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LogicalSize buttonContentBox(wm);
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if (aButtonReflowInput.ComputedBSize() != NS_UNCONSTRAINEDSIZE) {
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// Button has a fixed block-size -- that's its content-box bSize.
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buttonContentBox.BSize(wm) = aButtonReflowInput.ComputedBSize();
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} else {
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// Button is intrinsically sized -- it should shrinkwrap the contents'
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// bSize.
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// If we have size containment in block axis, ignore the contents and use
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// contain-intrinsic-block-size. The combobox content size with no content
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// is one line-height, not zero.
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const Maybe<nscoord> containBSize = ContainIntrinsicBSize(
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IsComboboxControlFrame() ? aButtonReflowInput.GetLineHeight() : 0);
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const nscoord bSize = containBSize.valueOr(contentsDesiredSize.BSize(wm));
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// Make sure we obey min/max-bSize in the case when we're doing intrinsic
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// sizing (we get it for free when we have a non-intrinsic
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// aButtonReflowInput.ComputedBSize()). Note that we do this before
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// adjusting for borderpadding, since mComputedMaxBSize and
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// mComputedMinBSize are content bSizes.
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buttonContentBox.BSize(wm) = aButtonReflowInput.ApplyMinMaxBSize(bSize);
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}
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if (aButtonReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE) {
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buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedISize();
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} else {
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nscoord iSize = aButtonReflowInput.mFrame->ContainIntrinsicISize().valueOr(
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contentsDesiredSize.ISize(wm));
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buttonContentBox.ISize(wm) = aButtonReflowInput.ApplyMinMaxISize(iSize);
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}
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// Center child in the block-direction in the button
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// (technically, inside of the button's focus-padding area)
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nscoord extraSpace =
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buttonContentBox.BSize(wm) - contentsDesiredSize.BSize(wm);
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childPos.B(wm) = std::max(0, extraSpace / 2);
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// Adjust childPos.B() to be in terms of the button's frame-rect:
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childPos.B(wm) += clbp.BStart(wm);
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nsSize containerSize = (buttonContentBox + clbp.Size(wm)).GetPhysicalSize(wm);
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// Place the child
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FinishReflowChild(aFirstKid, aPresContext, contentsDesiredSize,
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&contentsReflowInput, wm, childPos, containerSize,
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ReflowChildFlags::Default);
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// Make sure we have a useful 'ascent' value for the child
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if (contentsDesiredSize.BlockStartAscent() ==
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ReflowOutput::ASK_FOR_BASELINE) {
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WritingMode wm = aButtonReflowInput.GetWritingMode();
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contentsDesiredSize.SetBlockStartAscent(aFirstKid->GetLogicalBaseline(wm));
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}
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// OK, we're done with the child frame.
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// Use what we learned to populate the button frame's reflow metrics.
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// * Button's height & width are content-box size + border-box contribution:
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aButtonDesiredSize.SetSize(
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wm,
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LogicalSize(wm, aButtonReflowInput.ComputedISize() + clbp.IStartEnd(wm),
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buttonContentBox.BSize(wm) + clbp.BStartEnd(wm)));
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// * Button's ascent is its child's ascent, plus the child's block-offset
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// within our frame... unless it's orthogonal, in which case we'll use the
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// contents inline-size as an approximation for now.
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// XXX is there a better strategy? should we include border-padding?
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if (!aButtonReflowInput.mStyleDisplay->IsContainLayout()) {
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if (aButtonDesiredSize.GetWritingMode().IsOrthogonalTo(wm)) {
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aButtonDesiredSize.SetBlockStartAscent(
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wm.IsAlphabeticalBaseline() ? contentsDesiredSize.ISize(wm)
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: contentsDesiredSize.ISize(wm) / 2);
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} else {
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aButtonDesiredSize.SetBlockStartAscent(
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contentsDesiredSize.BlockStartAscent() + childPos.B(wm));
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}
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} // else: we're layout-contained, and so we have no baseline.
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aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
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}
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Maybe<nscoord> nsHTMLButtonControlFrame::GetNaturalBaselineBOffset(
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WritingMode aWM, BaselineSharingGroup aBaselineGroup,
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BaselineExportContext aExportContext) const {
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if (StyleDisplay()->IsContainLayout()) {
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return Nothing{};
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}
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nsIFrame* inner = mFrames.FirstChild();
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if (MOZ_UNLIKELY(inner->GetWritingMode().IsOrthogonalTo(aWM))) {
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return Nothing{};
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}
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auto result =
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inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aExportContext)
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.valueOrFrom([inner, aWM, aBaselineGroup]() {
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return Baseline::SynthesizeBOffsetFromBorderBox(inner, aWM,
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aBaselineGroup);
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});
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nscoord innerBStart = inner->BStart(aWM, GetSize());
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if (aBaselineGroup == BaselineSharingGroup::First) {
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return Some(result + innerBStart);
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}
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return Some(result + BSize(aWM) - (innerBStart + inner->BSize(aWM)));
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}
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BaselineSharingGroup nsHTMLButtonControlFrame::GetDefaultBaselineSharingGroup()
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const {
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nsIFrame* firstKid = mFrames.FirstChild();
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MOZ_ASSERT(firstKid, "Button should have a child frame for its contents");
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MOZ_ASSERT(!firstKid->GetNextSibling(),
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"Button should have exactly one child frame");
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return firstKid->GetDefaultBaselineSharingGroup();
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}
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nscoord nsHTMLButtonControlFrame::SynthesizeFallbackBaseline(
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mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup) const {
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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 {
|
|
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
|