1 files changed, 409 insertions, 0 deletions
diff --git a/layout/forms/nsHTMLButtonControlFrame.cpp b/layout/forms/nsHTMLButtonControlFrame.cpp
new file mode 100644
index 0000000000..150962a28c
--- /dev/null
+++ b/layout/forms/nsHTMLButtonControlFrame.cpp
@@ -0,0 +1,409 @@
+/* -*- 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/PresShell.h"
+#include "nsContainerFrame.h"
+#include "nsIFormControlFrame.h"
+#include "nsIFrameInlines.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsButtonFrameRenderer.h"
+#include "nsCSSAnonBoxes.h"
+#include "nsCheckboxRadioFrame.h"
+#include "nsNameSpaceManager.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::DestroyFrom(nsIFrame* aDestructRoot,
+                                           PostDestroyData& aPostDestroyData) {
+  nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
+  nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
+}
+
+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() {
+  return IsInput() || StyleDisplay()->mOverflowX != StyleOverflow::Visible;
+}
+
+void nsHTMLButtonControlFrame::BuildDisplayList(
+    nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) {
+  nsDisplayList onTop;
+  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 (StyleDisplay()->IsContainSize()) {
+    result = 0;
+  } 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 (StyleDisplay()->IsContainSize()) {
+    result = 0;
+  } 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!");
+
+  if (mState & NS_FRAME_FIRST_REFLOW) {
+    nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
+  }
+
+  // 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());
+
+  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
+}
+
+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.
+
+  const LayoutFrameType frameType = aFirstKid->Type();
+  if (frameType == LayoutFrameType::FlexContainer ||
+      frameType == LayoutFrameType::GridContainer) {
+    contentsReflowInput.ComputedBSize() = aButtonReflowInput.ComputedBSize();
+    contentsReflowInput.ComputedMinBSize() =
+        aButtonReflowInput.ComputedMinBSize();
+    contentsReflowInput.ComputedMaxBSize() =
+        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 if (aButtonReflowInput.mStyleDisplay->IsContainSize()) {
+    // Button is intrinsically sized and has size containment.
+    // It should have a BSize that is either zero or the minimum
+    // specified BSize.
+    buttonContentBox.BSize(wm) = aButtonReflowInput.ComputedMinBSize();
+  } else {
+    // Button is intrinsically sized -- it should shrinkwrap the
+    // button-contents' bSize:
+    buttonContentBox.BSize(wm) = 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) = NS_CSS_MINMAX(
+        buttonContentBox.BSize(wm), aButtonReflowInput.ComputedMinBSize(),
+        aButtonReflowInput.ComputedMaxBSize());
+  }
+  if (aButtonReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE) {
+    buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedISize();
+  } else if (aButtonReflowInput.mStyleDisplay->IsContainSize()) {
+    buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedMinISize();
+  } else {
+    buttonContentBox.ISize(wm) = contentsDesiredSize.ISize(wm);
+    buttonContentBox.ISize(wm) = NS_CSS_MINMAX(
+        buttonContentBox.ISize(wm), aButtonReflowInput.ComputedMinISize(),
+        aButtonReflowInput.ComputedMaxISize());
+  }
+
+  // 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(contentsDesiredSize.ISize(wm));
+    } else {
+      aButtonDesiredSize.SetBlockStartAscent(
+          contentsDesiredSize.BlockStartAscent() + childPos.B(wm));
+    }
+  }  // else: we're layout-contained, and so we have no baseline.
+
+  aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
+}
+
+bool nsHTMLButtonControlFrame::GetVerticalAlignBaseline(
+    mozilla::WritingMode aWM, nscoord* aBaseline) const {
+  nsIFrame* inner = mFrames.FirstChild();
+  if (MOZ_UNLIKELY(inner->GetWritingMode().IsOrthogonalTo(aWM))) {
+    return false;
+  }
+  if (!inner->GetVerticalAlignBaseline(aWM, aBaseline)) {
+    // <input type=color> has an empty block frame as inner frame
+    *aBaseline = inner->SynthesizeBaselineBOffsetFromBorderBox(
+        aWM, BaselineSharingGroup::First);
+  }
+  nscoord innerBStart = inner->BStart(aWM, GetSize());
+  *aBaseline += innerBStart;
+  return true;
+}
+
+bool nsHTMLButtonControlFrame::GetNaturalBaselineBOffset(
+    mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup,
+    nscoord* aBaseline) const {
+  nsIFrame* inner = mFrames.FirstChild();
+  if (MOZ_UNLIKELY(inner->GetWritingMode().IsOrthogonalTo(aWM))) {
+    return false;
+  }
+  if (!inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aBaseline)) {
+    // <input type=color> has an empty block frame as inner frame
+    *aBaseline =
+        inner->SynthesizeBaselineBOffsetFromBorderBox(aWM, aBaselineGroup);
+  }
+  nscoord innerBStart = inner->BStart(aWM, GetSize());
+  if (aBaselineGroup == BaselineSharingGroup::First) {
+    *aBaseline += innerBStart;
+  } else {
+    *aBaseline += BSize(aWM) - (innerBStart + inner->BSize(aWM));
+  }
+  return true;
+}
+
+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(ChildListID aListID,
+                                           nsIFrame* aOldFrame) {
+  MOZ_CRASH("unsupported operation");
+}
+#endif