gecko-dev/layout/forms/nsHTMLButtonControlFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsContainerFrame.h"
#include "nsIFormControlFrame.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsButtonFrameRenderer.h"
#include "nsCSSAnonBoxes.h"
#include "nsFormControlFrame.h"
#include "nsNameSpaceManager.h"
#include "nsDisplayList.h"
#include <algorithm>
using namespace mozilla;
nsContainerFrame*
NS_NewHTMLButtonControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsHTMLButtonControlFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsHTMLButtonControlFrame)
nsHTMLButtonControlFrame::nsHTMLButtonControlFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
{
}
nsHTMLButtonControlFrame::~nsHTMLButtonControlFrame()
{
}
void
nsHTMLButtonControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
nsContainerFrame::DestroyFrom(aDestructRoot);
}
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
nsIAtom*
nsHTMLButtonControlFrame::GetType() const
{
return nsGkAtoms::HTMLButtonControlFrame;
}
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 nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
bool
nsHTMLButtonControlFrame::ShouldClipPaintingToBorderBox()
{
return IsInput() || StyleDisplay()->mOverflowX != NS_STYLE_OVERFLOW_VISIBLE;
}
void
nsHTMLButtonControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
// Clip to our border area for event hit testing.
Maybe<DisplayListClipState::AutoSaveRestore> eventClipState;
const bool isForEventDelivery = aBuilder->IsForEventDelivery();
if (isForEventDelivery) {
eventClipState.emplace(aBuilder);
nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
nscoord radii[8];
bool hasRadii = GetBorderRadii(radii);
eventClipState->ClipContainingBlockDescendants(rect, hasRadii ? radii : nullptr);
}
nsDisplayList onTop;
if (IsVisibleForPainting(aBuilder)) {
mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
}
nsDisplayListCollection set;
// Do not allow the child subtree to receive events.
if (!isForEventDelivery) {
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(), aDirtyRect, set,
DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
// That should put the display items in set.Content()
}
// 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(nsRenderingContext* aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
nsIFrame* kid = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
kid,
nsLayoutUtils::MIN_ISIZE);
return result;
}
nscoord
nsHTMLButtonControlFrame::GetPrefISize(nsRenderingContext* aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
nsIFrame* kid = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
kid,
nsLayoutUtils::PREF_ISIZE);
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);
if (mState & NS_FRAME_FIRST_REFLOW) {
nsFormControlFrame::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->StyleContext()->GetPseudo() ==
nsCSSAnonBoxes::buttonContent,
"Button's child frame has unexpected pseudo type!");
// XXXbz Eventually we may want to check-and-bail if
// !aReflowInput.ShouldReflowAllKids() &&
// !NS_SUBTREE_DIRTY(firstKid).
// 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.
aStatus.Reset();
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_INTRINSICSIZE;
// shorthand for a value we need to use in a bunch of places
const LogicalMargin& clbp = aButtonReflowInput.ComputedLogicalBorderPadding();
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.
// 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, 0, 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_INTRINSICSIZE) {
// 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:
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_INTRINSICSIZE) {
buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedISize();
} 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, 0);
// 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 (aButtonDesiredSize.GetWritingMode().IsOrthogonalTo(wm)) {
aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.ISize(wm));
} else {
aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.BlockStartAscent() +
childPos.B(wm));
}
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::eFirst);
}
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::eFirst) {
*aBaseline += innerBStart;
} else {
*aBaseline += BSize(aWM) - (innerBStart + inner->BSize(aWM));
}
return true;
}
nsresult nsHTMLButtonControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
{
if (nsGkAtoms::value == aName) {
return mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
aValue, true);
}
return NS_OK;
}
nsStyleContext*
nsHTMLButtonControlFrame::GetAdditionalStyleContext(int32_t aIndex) const
{
return mRenderer.GetStyleContext(aIndex);
}
void
nsHTMLButtonControlFrame::SetAdditionalStyleContext(int32_t aIndex,
nsStyleContext* aStyleContext)
{
mRenderer.SetStyleContext(aIndex, aStyleContext);
}
void
nsHTMLButtonControlFrame::DoUpdateStyleOfOwnedAnonBoxes(
ServoStyleSet& aStyleSet,
nsStyleChangeList& aChangeList,
nsChangeHint aHintForThisFrame)
{
MOZ_ASSERT(mFrames.FirstChild(), "Must have our button-content anon box");
MOZ_ASSERT(!mFrames.FirstChild()->GetNextSibling(),
"Must only have our button-content anon box");
UpdateStyleOfChildAnonBox(mFrames.FirstChild(),
aStyleSet, aChangeList, aHintForThisFrame);
}
#ifdef DEBUG
void
nsHTMLButtonControlFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
MOZ_CRASH("unsupported operation");
}
void
nsHTMLButtonControlFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
MOZ_CRASH("unsupported operation");
}
void
nsHTMLButtonControlFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
MOZ_CRASH("unsupported operation");
}
#endif