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fune/layout/forms/nsRangeFrame.cpp
Emilio Cobos Álvarez 2414af9244 Bug 1793689 - Make GetMinimumWidgetSize work properly on non-XUL flexbox. r=TYLin,layout-reviewers 
The XUL behavior in nsBox.cpp is fairly different to what the non-XUL
layout code paths do. In particular, canOverride=false means that the
min-{width,height} properties cannot go under the min widget size of the
widget, but that doesn't mean that intrinsic sizes don't affect the
final size of the widget.

This is very visible if you turn on flex emulation on Windows or macOS,
where the toolbar has an appearance that returns
width=0,height=N,canOverride=false.

With flex emulation we'd collapse the item to be zero-width, which is
not good at all.

The good thing is that this is no longer exposed to the web
(non-native-theme always returns canOverride=true), and our front-end
code doesn't seem to rely on this, so we can just remove support for
canOverride=false.

Differential Revision: https://phabricator.services.mozilla.com/D158608
2022-10-05 19:09:29 +00:00

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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 "nsRangeFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/TouchEvents.h"
#include "gfxContext.h"
#include "nsContentCreatorFunctions.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSRendering.h"
#include "nsDisplayList.h"
#include "nsIContent.h"
#include "nsLayoutUtils.h"
#include "mozilla/dom/Document.h"
#include "nsNameSpaceManager.h"
#include "nsGkAtoms.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "nsPresContext.h"
#include "nsPresContextInlines.h"
#include "nsNodeInfoManager.h"
#include "mozilla/dom/Element.h"
#include "mozilla/ServoStyleSet.h"
#include "nsStyleConsts.h"
#ifdef ACCESSIBILITY
# include "nsAccessibilityService.h"
#endif
// Our intrinsic size is 12em in the main-axis and 1.3em in the cross-axis.
#define MAIN_AXIS_EM_SIZE 12
#define CROSS_AXIS_EM_SIZE 1.3f
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::image;
nsIFrame* NS_NewRangeFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell) nsRangeFrame(aStyle, aPresShell->GetPresContext());
}
nsRangeFrame::nsRangeFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID) {}
nsRangeFrame::~nsRangeFrame() = default;
NS_IMPL_FRAMEARENA_HELPERS(nsRangeFrame)
NS_QUERYFRAME_HEAD(nsRangeFrame)
NS_QUERYFRAME_ENTRY(nsRangeFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
void nsRangeFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
"nsRangeFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
aPostDestroyData.AddAnonymousContent(mTrackDiv.forget());
aPostDestroyData.AddAnonymousContent(mProgressDiv.forget());
aPostDestroyData.AddAnonymousContent(mThumbDiv.forget());
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
nsresult nsRangeFrame::MakeAnonymousDiv(Element** aResult,
PseudoStyleType aPseudoType,
nsTArray<ContentInfo>& aElements) {
nsCOMPtr<Document> doc = mContent->GetComposedDoc();
RefPtr<Element> resultElement = doc->CreateHTMLElement(nsGkAtoms::div);
// Associate the pseudo-element with the anonymous child.
resultElement->SetPseudoElementType(aPseudoType);
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier, or change the return type to void.
aElements.AppendElement(resultElement);
resultElement.forget(aResult);
return NS_OK;
}
nsresult nsRangeFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
nsresult rv;
// Create the ::-moz-range-track pseudo-element (a div):
rv = MakeAnonymousDiv(getter_AddRefs(mTrackDiv),
PseudoStyleType::mozRangeTrack, aElements);
NS_ENSURE_SUCCESS(rv, rv);
// Create the ::-moz-range-progress pseudo-element (a div):
rv = MakeAnonymousDiv(getter_AddRefs(mProgressDiv),
PseudoStyleType::mozRangeProgress, aElements);
NS_ENSURE_SUCCESS(rv, rv);
// Create the ::-moz-range-thumb pseudo-element (a div):
rv = MakeAnonymousDiv(getter_AddRefs(mThumbDiv),
PseudoStyleType::mozRangeThumb, aElements);
return rv;
}
void nsRangeFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) {
if (mTrackDiv) {
aElements.AppendElement(mTrackDiv);
}
if (mProgressDiv) {
aElements.AppendElement(mProgressDiv);
}
if (mThumbDiv) {
aElements.AppendElement(mThumbDiv);
}
}
void nsRangeFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
const nsStyleDisplay* disp = StyleDisplay();
if (IsThemed(disp)) {
DisplayBorderBackgroundOutline(aBuilder, aLists);
// Only create items for the thumb. Specifically, we do not want
// the track to paint, since *our* background is used to paint
// the track, and we don't want the unthemed track painting over
// the top of the themed track.
// This logic is copied from
// nsContainerFrame::BuildDisplayListForNonBlockChildren as
// called by BuildDisplayListForInline.
nsIFrame* thumb = mThumbDiv->GetPrimaryFrame();
if (thumb) {
nsDisplayListSet set(aLists, aLists.Content());
BuildDisplayListForChild(aBuilder, thumb, set, DisplayChildFlag::Inline);
}
} else {
BuildDisplayListForInline(aBuilder, aLists);
}
}
void nsRangeFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsRangeFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_ASSERTION(mTrackDiv, "::-moz-range-track div must exist!");
NS_ASSERTION(mProgressDiv, "::-moz-range-progress div must exist!");
NS_ASSERTION(mThumbDiv, "::-moz-range-thumb div must exist!");
NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
"nsRangeFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
WritingMode wm = aReflowInput.GetWritingMode();
nscoord computedBSize = aReflowInput.ComputedBSize();
if (computedBSize == NS_UNCONSTRAINEDSIZE) {
computedBSize = 0;
}
const auto borderPadding = aReflowInput.ComputedLogicalBorderPadding(wm);
LogicalSize finalSize(
wm, aReflowInput.ComputedISize() + borderPadding.IStartEnd(wm),
computedBSize + borderPadding.BStartEnd(wm));
aDesiredSize.SetSize(wm, finalSize);
ReflowAnonymousContent(aPresContext, aDesiredSize, aReflowInput);
aDesiredSize.SetOverflowAreasToDesiredBounds();
nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
if (trackFrame) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, trackFrame);
}
nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
if (rangeProgressFrame) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rangeProgressFrame);
}
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (thumbFrame) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, thumbFrame);
}
FinishAndStoreOverflow(&aDesiredSize);
MOZ_ASSERT(aStatus.IsEmpty(), "This type of frame can't be split.");
}
void nsRangeFrame::ReflowAnonymousContent(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput) {
// The width/height of our content box, which is the available width/height
// for our anonymous content:
nscoord rangeFrameContentBoxWidth = aReflowInput.ComputedWidth();
nscoord rangeFrameContentBoxHeight = aReflowInput.ComputedHeight();
if (rangeFrameContentBoxHeight == NS_UNCONSTRAINEDSIZE) {
rangeFrameContentBoxHeight = 0;
}
nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
if (trackFrame) { // display:none?
// Position the track:
// The idea here is that we allow content authors to style the width,
// height, border and padding of the track, but we ignore margin and
// positioning properties and do the positioning ourself to keep the center
// of the track's border box on the center of the nsRangeFrame's content
// box.
WritingMode wm = trackFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput trackReflowInput(aPresContext, aReflowInput, trackFrame,
availSize);
// Find the x/y position of the track frame such that it will be positioned
// as described above. These coordinates are with respect to the
// nsRangeFrame's border-box.
nscoord trackX = rangeFrameContentBoxWidth / 2;
nscoord trackY = rangeFrameContentBoxHeight / 2;
// Account for the track's border and padding (we ignore its margin):
trackX -= trackReflowInput.ComputedPhysicalBorderPadding().left +
trackReflowInput.ComputedWidth() / 2;
trackY -= trackReflowInput.ComputedPhysicalBorderPadding().top +
trackReflowInput.ComputedHeight() / 2;
// Make relative to our border box instead of our content box:
trackX += aReflowInput.ComputedPhysicalBorderPadding().left;
trackY += aReflowInput.ComputedPhysicalBorderPadding().top;
nsReflowStatus frameStatus;
ReflowOutput trackDesiredSize(aReflowInput);
ReflowChild(trackFrame, aPresContext, trackDesiredSize, trackReflowInput,
trackX, trackY, ReflowChildFlags::Default, frameStatus);
MOZ_ASSERT(
frameStatus.IsFullyComplete(),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(trackFrame, aPresContext, trackDesiredSize,
&trackReflowInput, trackX, trackY,
ReflowChildFlags::Default);
}
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (thumbFrame) { // display:none?
WritingMode wm = thumbFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput thumbReflowInput(aPresContext, aReflowInput, thumbFrame,
availSize);
// Where we position the thumb depends on its size, so we first reflow
// the thumb at {0,0} to obtain its size, then position it afterwards.
nsReflowStatus frameStatus;
ReflowOutput thumbDesiredSize(aReflowInput);
ReflowChild(thumbFrame, aPresContext, thumbDesiredSize, thumbReflowInput, 0,
0, ReflowChildFlags::Default, frameStatus);
MOZ_ASSERT(
frameStatus.IsFullyComplete(),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
&thumbReflowInput, 0, 0, ReflowChildFlags::Default);
DoUpdateThumbPosition(thumbFrame,
nsSize(aDesiredSize.Width(), aDesiredSize.Height()));
}
nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
if (rangeProgressFrame) { // display:none?
WritingMode wm = rangeProgressFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput progressReflowInput(aPresContext, aReflowInput,
rangeProgressFrame, availSize);
// We first reflow the range-progress frame at {0,0} to obtain its
// unadjusted dimensions, then we adjust it to so that the appropriate edge
// ends at the thumb.
nsReflowStatus frameStatus;
ReflowOutput progressDesiredSize(aReflowInput);
ReflowChild(rangeProgressFrame, aPresContext, progressDesiredSize,
progressReflowInput, 0, 0, ReflowChildFlags::Default,
frameStatus);
MOZ_ASSERT(
frameStatus.IsFullyComplete(),
"We gave our child unconstrained height, so it should be complete");
FinishReflowChild(rangeProgressFrame, aPresContext, progressDesiredSize,
&progressReflowInput, 0, 0, ReflowChildFlags::Default);
DoUpdateRangeProgressFrame(
rangeProgressFrame,
nsSize(aDesiredSize.Width(), aDesiredSize.Height()));
}
}
#ifdef ACCESSIBILITY
a11y::AccType nsRangeFrame::AccessibleType() { return a11y::eHTMLRangeType; }
#endif
double nsRangeFrame::GetValueAsFractionOfRange() {
MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
auto* input = static_cast<dom::HTMLInputElement*>(GetContent());
MOZ_ASSERT(input->ControlType() == FormControlType::InputRange);
Decimal value = input->GetValueAsDecimal();
Decimal minimum = input->GetMinimum();
Decimal maximum = input->GetMaximum();
MOZ_ASSERT(value.isFinite() && minimum.isFinite() && maximum.isFinite(),
"type=range should have a default maximum/minimum");
if (maximum <= minimum) {
// Avoid rounding triggering the assert by checking against an epsilon.
MOZ_ASSERT((value - minimum).abs().toDouble() <
std::numeric_limits<float>::epsilon(),
"Unsanitized value");
return 0.0;
}
MOZ_ASSERT(value >= minimum && value <= maximum, "Unsanitized value");
return ((value - minimum) / (maximum - minimum)).toDouble();
}
Decimal nsRangeFrame::GetValueAtEventPoint(WidgetGUIEvent* aEvent) {
MOZ_ASSERT(
aEvent->mClass == eMouseEventClass || aEvent->mClass == eTouchEventClass,
"Unexpected event type - aEvent->mRefPoint may be meaningless");
MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
dom::HTMLInputElement* input =
static_cast<dom::HTMLInputElement*>(GetContent());
MOZ_ASSERT(input->ControlType() == FormControlType::InputRange);
Decimal minimum = input->GetMinimum();
Decimal maximum = input->GetMaximum();
MOZ_ASSERT(minimum.isFinite() && maximum.isFinite(),
"type=range should have a default maximum/minimum");
if (maximum <= minimum) {
return minimum;
}
Decimal range = maximum - minimum;
LayoutDeviceIntPoint absPoint;
if (aEvent->mClass == eTouchEventClass) {
MOZ_ASSERT(aEvent->AsTouchEvent()->mTouches.Length() == 1,
"Unexpected number of mTouches");
absPoint = aEvent->AsTouchEvent()->mTouches[0]->mRefPoint;
} else {
absPoint = aEvent->mRefPoint;
}
nsPoint point = nsLayoutUtils::GetEventCoordinatesRelativeTo(
aEvent, absPoint, RelativeTo{this});
if (point == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
// We don't want to change the current value for this error state.
return static_cast<dom::HTMLInputElement*>(GetContent())
->GetValueAsDecimal();
}
nsRect rangeContentRect = GetContentRectRelativeToSelf();
nsSize thumbSize;
if (IsThemed()) {
// We need to get the size of the thumb from the theme.
nsPresContext* pc = PresContext();
LayoutDeviceIntSize size = pc->Theme()->GetMinimumWidgetSize(
pc, this, StyleAppearance::RangeThumb);
thumbSize =
LayoutDeviceIntSize::ToAppUnits(size, pc->AppUnitsPerDevPixel());
// For GTK, GetMinimumWidgetSize returns zero for the thumb dimension
// perpendicular to the orientation of the slider. That's okay since we
// only care about the dimension in the direction of the slider when using
// |thumbSize| below, but it means this assertion need to check
// IsHorizontal().
MOZ_ASSERT((IsHorizontal() && thumbSize.width > 0) ||
(!IsHorizontal() && thumbSize.height > 0),
"The thumb is expected to take up some slider space");
} else {
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (thumbFrame) { // diplay:none?
thumbSize = thumbFrame->GetSize();
}
}
Decimal fraction;
if (IsHorizontal()) {
nscoord traversableDistance = rangeContentRect.width - thumbSize.width;
if (traversableDistance <= 0) {
return minimum;
}
nscoord posAtStart = rangeContentRect.x + thumbSize.width / 2;
nscoord posAtEnd = posAtStart + traversableDistance;
nscoord posOfPoint = mozilla::clamped(point.x, posAtStart, posAtEnd);
fraction = Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
if (IsRightToLeft()) {
fraction = Decimal(1) - fraction;
}
} else {
nscoord traversableDistance = rangeContentRect.height - thumbSize.height;
if (traversableDistance <= 0) {
return minimum;
}
nscoord posAtStart = rangeContentRect.y + thumbSize.height / 2;
nscoord posAtEnd = posAtStart + traversableDistance;
nscoord posOfPoint = mozilla::clamped(point.y, posAtStart, posAtEnd);
// For a vertical range, the top (posAtStart) is the highest value, so we
// subtract the fraction from 1.0 to get that polarity correct.
fraction = Decimal(1) -
Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
}
MOZ_ASSERT(fraction >= Decimal(0) && fraction <= Decimal(1));
return minimum + fraction * range;
}
void nsRangeFrame::UpdateForValueChange() {
if (IsSubtreeDirty()) {
return; // we're going to be updated when we reflow
}
nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
if (!rangeProgressFrame && !thumbFrame) {
return; // diplay:none?
}
if (rangeProgressFrame) {
DoUpdateRangeProgressFrame(rangeProgressFrame, GetSize());
}
if (thumbFrame) {
DoUpdateThumbPosition(thumbFrame, GetSize());
}
if (IsThemed()) {
// We don't know the exact dimensions or location of the thumb when native
// theming is applied, so we just repaint the entire range.
InvalidateFrame();
}
#ifdef ACCESSIBILITY
if (nsAccessibilityService* accService =
PresShell::GetAccessibilityService()) {
accService->RangeValueChanged(PresShell(), mContent);
}
#endif
SchedulePaint();
}
void nsRangeFrame::DoUpdateThumbPosition(nsIFrame* aThumbFrame,
const nsSize& aRangeSize) {
MOZ_ASSERT(aThumbFrame);
// The idea here is that we want to position the thumb so that the center
// of the thumb is on an imaginary line drawn from the middle of one edge
// of the range frame's content box to the middle of the opposite edge of
// its content box (the opposite edges being the left/right edge if the
// range is horizontal, or else the top/bottom edges if the range is
// vertical). How far along this line the center of the thumb is placed
// depends on the value of the range.
nsMargin borderAndPadding = GetUsedBorderAndPadding();
nsPoint newPosition(borderAndPadding.left, borderAndPadding.top);
nsSize rangeContentBoxSize(aRangeSize);
rangeContentBoxSize.width -= borderAndPadding.LeftRight();
rangeContentBoxSize.height -= borderAndPadding.TopBottom();
nsSize thumbSize = aThumbFrame->GetSize();
double fraction = GetValueAsFractionOfRange();
MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
if (IsHorizontal()) {
if (thumbSize.width < rangeContentBoxSize.width) {
nscoord traversableDistance = rangeContentBoxSize.width - thumbSize.width;
if (IsRightToLeft()) {
newPosition.x += NSToCoordRound((1.0 - fraction) * traversableDistance);
} else {
newPosition.x += NSToCoordRound(fraction * traversableDistance);
}
newPosition.y += (rangeContentBoxSize.height - thumbSize.height) / 2;
}
} else {
if (thumbSize.height < rangeContentBoxSize.height) {
nscoord traversableDistance =
rangeContentBoxSize.height - thumbSize.height;
newPosition.x += (rangeContentBoxSize.width - thumbSize.width) / 2;
newPosition.y += NSToCoordRound((1.0 - fraction) * traversableDistance);
}
}
aThumbFrame->SetPosition(newPosition);
}
void nsRangeFrame::DoUpdateRangeProgressFrame(nsIFrame* aRangeProgressFrame,
const nsSize& aRangeSize) {
MOZ_ASSERT(aRangeProgressFrame);
// The idea here is that we want to position the ::-moz-range-progress
// pseudo-element so that the center line running along its length is on the
// corresponding center line of the nsRangeFrame's content box. In the other
// dimension, we align the "start" edge of the ::-moz-range-progress
// pseudo-element's border-box with the corresponding edge of the
// nsRangeFrame's content box, and we size the progress element's border-box
// to have a length of GetValueAsFractionOfRange() times the nsRangeFrame's
// content-box size.
nsMargin borderAndPadding = GetUsedBorderAndPadding();
nsSize progSize = aRangeProgressFrame->GetSize();
nsRect progRect(borderAndPadding.left, borderAndPadding.top, progSize.width,
progSize.height);
nsSize rangeContentBoxSize(aRangeSize);
rangeContentBoxSize.width -= borderAndPadding.LeftRight();
rangeContentBoxSize.height -= borderAndPadding.TopBottom();
double fraction = GetValueAsFractionOfRange();
MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
if (IsHorizontal()) {
nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.width);
if (IsRightToLeft()) {
progRect.x += rangeContentBoxSize.width - progLength;
}
progRect.y += (rangeContentBoxSize.height - progSize.height) / 2;
progRect.width = progLength;
} else {
nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.height);
progRect.x += (rangeContentBoxSize.width - progSize.width) / 2;
progRect.y += rangeContentBoxSize.height - progLength;
progRect.height = progLength;
}
aRangeProgressFrame->SetRect(progRect);
}
nsresult nsRangeFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
NS_ASSERTION(mTrackDiv, "The track div must exist!");
NS_ASSERTION(mThumbDiv, "The thumb div must exist!");
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::min ||
aAttribute == nsGkAtoms::max || aAttribute == nsGkAtoms::step) {
// We want to update the position of the thumb, except in one special
// case: If the value attribute is being set, it is possible that we are
// in the middle of a type change away from type=range, under the
// SetAttr(..., nsGkAtoms::value, ...) call in HTMLInputElement::
// HandleTypeChange. In that case the HTMLInputElement's type will
// already have changed, and if we call UpdateForValueChange()
// we'll fail the asserts under that call that check the type of our
// HTMLInputElement. Given that we're changing away from being a range
// and this frame will shortly be destroyed, there's no point in calling
// UpdateForValueChange() anyway.
MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
bool typeIsRange =
static_cast<dom::HTMLInputElement*>(GetContent())->ControlType() ==
FormControlType::InputRange;
// If script changed the <input>'s type before setting these attributes
// then we don't need to do anything since we are going to be reframed.
if (typeIsRange) {
UpdateForValueChange();
}
} else if (aAttribute == nsGkAtoms::orient) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::Resize,
NS_FRAME_IS_DIRTY);
}
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
nscoord nsRangeFrame::AutoCrossSize(Length aEm) {
nscoord minCrossSize(0);
if (IsThemed()) {
nsPresContext* pc = PresContext();
LayoutDeviceIntSize size = pc->Theme()->GetMinimumWidgetSize(
pc, this, StyleAppearance::RangeThumb);
minCrossSize =
pc->DevPixelsToAppUnits(IsHorizontal() ? size.height : size.width);
}
return std::max(minCrossSize, aEm.ScaledBy(CROSS_AXIS_EM_SIZE).ToAppUnits());
}
static mozilla::Length OneEm(nsRangeFrame* aFrame) {
return aFrame->StyleFont()->mFont.size.ScaledBy(
nsLayoutUtils::FontSizeInflationFor(aFrame));
}
LogicalSize nsRangeFrame::ComputeAutoSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
ComputeSizeFlags aFlags) {
bool isInlineOriented = IsInlineOriented();
auto em = OneEm(this);
const WritingMode wm = GetWritingMode();
LogicalSize autoSize(wm);
if (isInlineOriented) {
autoSize.ISize(wm) = em.ScaledBy(MAIN_AXIS_EM_SIZE).ToAppUnits();
autoSize.BSize(wm) = AutoCrossSize(em);
} else {
autoSize.ISize(wm) = AutoCrossSize(em);
autoSize.BSize(wm) = em.ScaledBy(MAIN_AXIS_EM_SIZE).ToAppUnits();
}
return autoSize.ConvertTo(aWM, wm);
}
nscoord nsRangeFrame::GetMinISize(gfxContext* aRenderingContext) {
auto pos = StylePosition();
auto wm = GetWritingMode();
if (pos->ISize(wm).HasPercent()) {
// https://drafts.csswg.org/css-sizing-3/#percentage-sizing
// https://drafts.csswg.org/css-sizing-3/#min-content-zero
return nsLayoutUtils::ResolveToLength<true>(
pos->ISize(wm).AsLengthPercentage(), nscoord(0));
}
return GetPrefISize(aRenderingContext);
}
nscoord nsRangeFrame::GetPrefISize(gfxContext* aRenderingContext) {
auto em = OneEm(this);
if (IsInlineOriented()) {
return em.ScaledBy(MAIN_AXIS_EM_SIZE).ToAppUnits();
}
return AutoCrossSize(em);
}
bool nsRangeFrame::IsHorizontal() const {
dom::HTMLInputElement* element =
static_cast<dom::HTMLInputElement*>(GetContent());
return element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
nsGkAtoms::horizontal, eCaseMatters) ||
(!element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
nsGkAtoms::vertical, eCaseMatters) &&
GetWritingMode().IsVertical() ==
element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
nsGkAtoms::block, eCaseMatters));
}
double nsRangeFrame::GetMin() const {
return static_cast<dom::HTMLInputElement*>(GetContent())
->GetMinimum()
.toDouble();
}
double nsRangeFrame::GetMax() const {
return static_cast<dom::HTMLInputElement*>(GetContent())
->GetMaximum()
.toDouble();
}
double nsRangeFrame::GetValue() const {
return static_cast<dom::HTMLInputElement*>(GetContent())
->GetValueAsDecimal()
.toDouble();
}
bool nsRangeFrame::ShouldUseNativeStyle() const {
nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
nsIFrame* progressFrame = mProgressDiv->GetPrimaryFrame();
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
return StyleDisplay()->EffectiveAppearance() == StyleAppearance::Range &&
trackFrame &&
!trackFrame->Style()->HasAuthorSpecifiedBorderOrBackground() &&
progressFrame &&
!progressFrame->Style()->HasAuthorSpecifiedBorderOrBackground() &&
thumbFrame &&
!thumbFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
}
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