mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/layout/forms/nsRangeFrame.cpp

722 строки
28 KiB
C++
Исходник Ответственный История

/* -*- 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/EventStates.h"
#include "mozilla/PresShell.h"
#include "mozilla/TouchEvents.h"
#include "gfxContext.h"
#include "nsContentCreatorFunctions.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSRendering.h"
#include "nsCheckboxRadioFrame.h"
#include "nsIContent.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;
NS_IMPL_ISUPPORTS(nsRangeFrame::DummyTouchListener, nsIDOMEventListener)
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::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
// With APZ enabled, touch events may be handled directly by the APZC code
// if the APZ knows that there is no content interested in the touch event.
// The range input element *is* interested in touch events, but doesn't use
// the usual mechanism (i.e. registering an event listener) to handle touch
// input. Instead, we do it here so that the APZ finds out about it, and
// makes sure to wait for content to run handlers before handling the touch
// input itself.
if (!mDummyTouchListener) {
mDummyTouchListener = new DummyTouchListener();
}
aContent->AddEventListener(u"touchstart"_ns, mDummyTouchListener, false);
return nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
}
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.");
mContent->RemoveEventListener(u"touchstart"_ns, mDummyTouchListener, false);
nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
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.");
if (mState & NS_FRAME_FIRST_REFLOW) {
nsCheckboxRadioFrame::RegUnRegAccessKey(this, true);
}
WritingMode wm = aReflowInput.GetWritingMode();
nscoord computedBSize = aReflowInput.ComputedBSize();
if (computedBSize == NS_UNCONSTRAINEDSIZE) {
computedBSize = 0;
}
LogicalSize finalSize(
wm,
aReflowInput.ComputedISize() +
aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm),
computedBSize +
aReflowInput.ComputedLogicalBorderPadding().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.");
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
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");
dom::HTMLInputElement* input =
static_cast<dom::HTMLInputElement*>(GetContent());
MOZ_ASSERT(input->ControlType() == NS_FORM_INPUT_RANGE);
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() == NS_FORM_INPUT_RANGE);
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* presContext = PresContext();
bool notUsedCanOverride;
LayoutDeviceIntSize size;
presContext->Theme()->GetMinimumWidgetSize(presContext, this,
StyleAppearance::RangeThumb,
&size, &notUsedCanOverride);
thumbSize.width = presContext->DevPixelsToAppUnits(size.width);
thumbSize.height = presContext->DevPixelsToAppUnits(size.height);
// 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() ==
NS_FORM_INPUT_RANGE;
// 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()) {
bool unused;
LayoutDeviceIntSize size;
nsPresContext* pc = PresContext();
pc->Theme()->GetMinimumWidgetSize(pc, this, StyleAppearance::RangeThumb,
&size, &unused);
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, 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();
}
#define STYLES_DISABLING_NATIVE_THEMING \
NS_AUTHOR_SPECIFIED_BORDER_OR_BACKGROUND | NS_AUTHOR_SPECIFIED_PADDING
bool nsRangeFrame::ShouldUseNativeStyle() const {
nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
nsIFrame* progressFrame = mProgressDiv->GetPrimaryFrame();
nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
return StyleDisplay()->EffectiveAppearance() == StyleAppearance::Range &&
trackFrame &&
!PresContext()->HasAuthorSpecifiedRules(
trackFrame, STYLES_DISABLING_NATIVE_THEMING) &&
progressFrame &&
!PresContext()->HasAuthorSpecifiedRules(
progressFrame, STYLES_DISABLING_NATIVE_THEMING) &&
thumbFrame &&
!PresContext()->HasAuthorSpecifiedRules(
thumbFrame, STYLES_DISABLING_NATIVE_THEMING);
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку