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-rw-r--r--layout/forms/nsRangeFrame.cpp780
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diff --git a/layout/forms/nsRangeFrame.cpp b/layout/forms/nsRangeFrame.cpp
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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 "ListMutationObserver.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/TouchEvents.h"
+
+#include "gfxContext.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsCSSRendering.h"
+#include "nsDisplayList.h"
+#include "nsIContent.h"
+#include "nsLayoutUtils.h"
+#include "mozilla/dom/Document.h"
+#include "nsGkAtoms.h"
+#include "mozilla/dom/HTMLDataListElement.h"
+#include "mozilla/dom/HTMLInputElement.h"
+#include "mozilla/dom/HTMLOptionElement.h"
+#include "mozilla/dom/MutationEventBinding.h"
+#include "nsPresContext.h"
+#include "nsNodeInfoManager.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/ServoStyleSet.h"
+#include "nsTArray.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) {}
+
+void nsRangeFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) {
+ nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
+ if (InputElement().HasAttr(nsGkAtoms::list_)) {
+ mListMutationObserver = new ListMutationObserver(*this);
+ }
+}
+
+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::Destroy(DestroyContext& aContext) {
+ NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
+ "nsRangeFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+
+ if (mListMutationObserver) {
+ mListMutationObserver->Detach();
+ }
+ aContext.AddAnonymousContent(mTrackDiv.forget());
+ aContext.AddAnonymousContent(mProgressDiv.forget());
+ aContext.AddAnonymousContent(mThumbDiv.forget());
+ nsContainerFrame::Destroy(aContext);
+}
+
+static already_AddRefed<Element> MakeAnonymousDiv(
+ Document& aDoc, PseudoStyleType aOldPseudoType,
+ PseudoStyleType aModernPseudoType,
+ nsTArray<nsIAnonymousContentCreator::ContentInfo>& aElements) {
+ RefPtr<Element> result = aDoc.CreateHTMLElement(nsGkAtoms::div);
+
+ // Associate the pseudo-element with the anonymous child.
+ if (StaticPrefs::layout_css_modern_range_pseudos_enabled()) {
+ result->SetPseudoElementType(aModernPseudoType);
+ } else {
+ result->SetPseudoElementType(aOldPseudoType);
+ }
+
+ // XXX(Bug 1631371) Check if this should use a fallible operation as it
+ // pretended earlier, or change the return type to void.
+ aElements.AppendElement(result);
+
+ return result.forget();
+}
+
+nsresult nsRangeFrame::CreateAnonymousContent(
+ nsTArray<ContentInfo>& aElements) {
+ Document* doc = mContent->OwnerDoc();
+ // Create the ::-moz-range-track pseudo-element (a div):
+ mTrackDiv = MakeAnonymousDiv(*doc, PseudoStyleType::mozRangeTrack,
+ PseudoStyleType::sliderTrack, aElements);
+ // Create the ::-moz-range-progress pseudo-element (a div):
+ mProgressDiv = MakeAnonymousDiv(*doc, PseudoStyleType::mozRangeProgress,
+ PseudoStyleType::sliderFill, aElements);
+ // Create the ::-moz-range-thumb pseudo-element (a div):
+ mThumbDiv = MakeAnonymousDiv(*doc, PseudoStyleType::mozRangeThumb,
+ PseudoStyleType::sliderThumb, aElements);
+ return NS_OK;
+}
+
+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.
+ if (nsIFrame* thumb = mThumbDiv->GetPrimaryFrame()) {
+ 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() {
+ const auto& input = InputElement();
+ if (MOZ_UNLIKELY(!input.IsDoneCreating())) {
+ // Our element isn't done being created, so its values haven't yet been
+ // sanitized! (It's rare that we'd be reflowed when our element is in this
+ // state, but it can happen if the parser decides to yield while processing
+ // its tasks to build the element.) We can't trust that any of our numeric
+ // values will make sense until they've been sanitized; so for now, just
+ // use 0.0 as a fallback fraction-of-range value here (i.e. behave as if
+ // we're at our minimum, which is how the spec handles some edge cases).
+ return 0.0;
+ }
+ return GetDoubleAsFractionOfRange(input.GetValueAsDecimal());
+}
+
+double nsRangeFrame::GetDoubleAsFractionOfRange(const Decimal& aValue) {
+ auto& input = InputElement();
+
+ Decimal minimum = input.GetMinimum();
+ Decimal maximum = input.GetMaximum();
+
+ MOZ_ASSERT(aValue.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((aValue - minimum).abs().toDouble() <
+ std::numeric_limits<float>::epsilon(),
+ "Unsanitized value");
+ return 0.0;
+ }
+
+ MOZ_ASSERT(aValue >= minimum && aValue <= maximum, "Unsanitized value");
+
+ return ((aValue - 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(posOfPoint - posAtStart) / Decimal(traversableDistance);
+ if (IsUpwards()) {
+ fraction = Decimal(1) - fraction;
+ }
+ }
+
+ 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 = GetAccService()) {
+ accService->RangeValueChanged(PresShell(), mContent);
+ }
+#endif
+
+ SchedulePaint();
+}
+
+nsTArray<Decimal> nsRangeFrame::TickMarks() {
+ nsTArray<Decimal> tickMarks;
+ auto& input = InputElement();
+ auto* list = input.GetList();
+ if (!list) {
+ return tickMarks;
+ }
+ auto min = input.GetMinimum();
+ auto max = input.GetMaximum();
+ auto* options = list->Options();
+ nsAutoString label;
+ for (uint32_t i = 0; i < options->Length(); ++i) {
+ auto* item = options->Item(i);
+ auto* option = HTMLOptionElement::FromNode(item);
+ MOZ_ASSERT(option);
+ if (option->Disabled()) {
+ continue;
+ }
+ nsAutoString str;
+ option->GetValue(str);
+ auto tickMark = HTMLInputElement::StringToDecimal(str);
+ if (tickMark.isNaN() || tickMark < min || tickMark > max ||
+ input.ValueIsStepMismatch(tickMark)) {
+ continue;
+ }
+ tickMarks.AppendElement(tickMark);
+ }
+ tickMarks.Sort();
+ return tickMarks;
+}
+
+Decimal nsRangeFrame::NearestTickMark(const Decimal& aValue) {
+ auto tickMarks = TickMarks();
+ if (tickMarks.IsEmpty() || aValue.isNaN()) {
+ return Decimal::nan();
+ }
+ size_t index;
+ if (BinarySearch(tickMarks, 0, tickMarks.Length(), aValue, &index)) {
+ return tickMarks[index];
+ }
+ if (index == tickMarks.Length()) {
+ return tickMarks.LastElement();
+ }
+ if (index == 0) {
+ return tickMarks[0];
+ }
+ const auto& smallerTickMark = tickMarks[index - 1];
+ const auto& largerTickMark = tickMarks[index];
+ MOZ_ASSERT(smallerTickMark < aValue);
+ MOZ_ASSERT(largerTickMark > aValue);
+ return (aValue - smallerTickMark).abs() < (aValue - largerTickMark).abs()
+ ? smallerTickMark
+ : largerTickMark;
+}
+
+mozilla::dom::HTMLInputElement& nsRangeFrame::InputElement() const {
+ MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
+ auto& input = *static_cast<dom::HTMLInputElement*>(GetContent());
+ MOZ_ASSERT(input.ControlType() == FormControlType::InputRange);
+ return input;
+}
+
+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;
+ if (IsUpwards()) {
+ newPosition.y += NSToCoordRound((1.0 - fraction) * traversableDistance);
+ } else {
+ newPosition.y += NSToCoordRound(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;
+ if (IsUpwards()) {
+ 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::None,
+ NS_FRAME_IS_DIRTY);
+ } else if (aAttribute == nsGkAtoms::list_) {
+ const bool isRemoval = aModType == MutationEvent_Binding::REMOVAL;
+ if (mListMutationObserver) {
+ mListMutationObserver->Detach();
+ if (isRemoval) {
+ mListMutationObserver = nullptr;
+ } else {
+ mListMutationObserver->Attach();
+ }
+ } else if (!isRemoval) {
+ mListMutationObserver = new ListMutationObserver(*this, true);
+ }
+ }
+ }
+
+ 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) {
+ const 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();
+}