1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/forms/nsRangeFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,886 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsRangeFrame.h"
1.10 +
1.11 +#include "mozilla/EventStates.h"
1.12 +#include "mozilla/TouchEvents.h"
1.13 +
1.14 +#include "nsContentCreatorFunctions.h"
1.15 +#include "nsContentList.h"
1.16 +#include "nsContentUtils.h"
1.17 +#include "nsCSSRendering.h"
1.18 +#include "nsFormControlFrame.h"
1.19 +#include "nsIContent.h"
1.20 +#include "nsIDocument.h"
1.21 +#include "nsNameSpaceManager.h"
1.22 +#include "nsINodeInfo.h"
1.23 +#include "nsIPresShell.h"
1.24 +#include "nsGkAtoms.h"
1.25 +#include "mozilla/dom/HTMLInputElement.h"
1.26 +#include "nsPresContext.h"
1.27 +#include "nsNodeInfoManager.h"
1.28 +#include "nsRenderingContext.h"
1.29 +#include "mozilla/dom/Element.h"
1.30 +#include "nsStyleSet.h"
1.31 +#include "nsThemeConstants.h"
1.32 +
1.33 +#ifdef ACCESSIBILITY
1.34 +#include "nsAccessibilityService.h"
1.35 +#endif
1.36 +
1.37 +#define LONG_SIDE_TO_SHORT_SIDE_RATIO 10
1.38 +
1.39 +using namespace mozilla;
1.40 +using namespace mozilla::dom;
1.41 +
1.42 +nsIFrame*
1.43 +NS_NewRangeFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.44 +{
1.45 + return new (aPresShell) nsRangeFrame(aContext);
1.46 +}
1.47 +
1.48 +nsRangeFrame::nsRangeFrame(nsStyleContext* aContext)
1.49 + : nsContainerFrame(aContext)
1.50 +{
1.51 +}
1.52 +
1.53 +nsRangeFrame::~nsRangeFrame()
1.54 +{
1.55 +}
1.56 +
1.57 +NS_IMPL_FRAMEARENA_HELPERS(nsRangeFrame)
1.58 +
1.59 +NS_QUERYFRAME_HEAD(nsRangeFrame)
1.60 + NS_QUERYFRAME_ENTRY(nsRangeFrame)
1.61 + NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
1.62 +NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
1.63 +
1.64 +void
1.65 +nsRangeFrame::Init(nsIContent* aContent,
1.66 + nsIFrame* aParent,
1.67 + nsIFrame* aPrevInFlow)
1.68 +{
1.69 + // B2G's AsyncPanZoomController::ReceiveInputEvent handles touch events
1.70 + // without checking whether the out-of-process document that it controls
1.71 + // will handle them, unless it has been told that the document might do so.
1.72 + // This is for perf reasons, otherwise it has to wait for the event to be
1.73 + // round-tripped to the other process and back, delaying panning, etc.
1.74 + // We must call SetHasTouchEventListeners() in order to get APZC to wait
1.75 + // until the event has been round-tripped and check whether it has been
1.76 + // handled, otherwise B2G will end up panning the document when the user
1.77 + // tries to drag our thumb.
1.78 + //
1.79 + nsIPresShell* presShell = PresContext()->GetPresShell();
1.80 + if (presShell) {
1.81 + nsIDocument* document = presShell->GetDocument();
1.82 + if (document) {
1.83 + nsPIDOMWindow* innerWin = document->GetInnerWindow();
1.84 + if (innerWin) {
1.85 + innerWin->SetHasTouchEventListeners();
1.86 + }
1.87 + }
1.88 + }
1.89 +
1.90 + nsStyleSet *styleSet = PresContext()->StyleSet();
1.91 +
1.92 + mOuterFocusStyle =
1.93 + styleSet->ProbePseudoElementStyle(aContent->AsElement(),
1.94 + nsCSSPseudoElements::ePseudo_mozFocusOuter,
1.95 + StyleContext());
1.96 +
1.97 + return nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
1.98 +}
1.99 +
1.100 +void
1.101 +nsRangeFrame::DestroyFrom(nsIFrame* aDestructRoot)
1.102 +{
1.103 + NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
1.104 + "nsRangeFrame should not have continuations; if it does we "
1.105 + "need to call RegUnregAccessKey only for the first.");
1.106 + nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
1.107 + nsContentUtils::DestroyAnonymousContent(&mTrackDiv);
1.108 + nsContentUtils::DestroyAnonymousContent(&mProgressDiv);
1.109 + nsContentUtils::DestroyAnonymousContent(&mThumbDiv);
1.110 + nsContainerFrame::DestroyFrom(aDestructRoot);
1.111 +}
1.112 +
1.113 +nsresult
1.114 +nsRangeFrame::MakeAnonymousDiv(Element** aResult,
1.115 + nsCSSPseudoElements::Type aPseudoType,
1.116 + nsTArray<ContentInfo>& aElements)
1.117 +{
1.118 + nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
1.119 + nsRefPtr<Element> resultElement = doc->CreateHTMLElement(nsGkAtoms::div);
1.120 +
1.121 + // Associate the pseudo-element with the anonymous child.
1.122 + nsRefPtr<nsStyleContext> newStyleContext =
1.123 + PresContext()->StyleSet()->ResolvePseudoElementStyle(mContent->AsElement(),
1.124 + aPseudoType,
1.125 + StyleContext(),
1.126 + resultElement);
1.127 +
1.128 + if (!aElements.AppendElement(ContentInfo(resultElement, newStyleContext))) {
1.129 + return NS_ERROR_OUT_OF_MEMORY;
1.130 + }
1.131 +
1.132 + resultElement.forget(aResult);
1.133 + return NS_OK;
1.134 +}
1.135 +
1.136 +nsresult
1.137 +nsRangeFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
1.138 +{
1.139 + nsresult rv;
1.140 +
1.141 + // Create the ::-moz-range-track pseuto-element (a div):
1.142 + rv = MakeAnonymousDiv(getter_AddRefs(mTrackDiv),
1.143 + nsCSSPseudoElements::ePseudo_mozRangeTrack,
1.144 + aElements);
1.145 + NS_ENSURE_SUCCESS(rv, rv);
1.146 +
1.147 + // Create the ::-moz-range-progress pseudo-element (a div):
1.148 + rv = MakeAnonymousDiv(getter_AddRefs(mProgressDiv),
1.149 + nsCSSPseudoElements::ePseudo_mozRangeProgress,
1.150 + aElements);
1.151 + NS_ENSURE_SUCCESS(rv, rv);
1.152 +
1.153 + // Create the ::-moz-range-thumb pseudo-element (a div):
1.154 + rv = MakeAnonymousDiv(getter_AddRefs(mThumbDiv),
1.155 + nsCSSPseudoElements::ePseudo_mozRangeThumb,
1.156 + aElements);
1.157 + return rv;
1.158 +}
1.159 +
1.160 +void
1.161 +nsRangeFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
1.162 + uint32_t aFilter)
1.163 +{
1.164 + aElements.MaybeAppendElement(mTrackDiv);
1.165 + aElements.MaybeAppendElement(mProgressDiv);
1.166 + aElements.MaybeAppendElement(mThumbDiv);
1.167 +}
1.168 +
1.169 +class nsDisplayRangeFocusRing : public nsDisplayItem
1.170 +{
1.171 +public:
1.172 + nsDisplayRangeFocusRing(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
1.173 + : nsDisplayItem(aBuilder, aFrame) {
1.174 + MOZ_COUNT_CTOR(nsDisplayRangeFocusRing);
1.175 + }
1.176 +#ifdef NS_BUILD_REFCNT_LOGGING
1.177 + virtual ~nsDisplayRangeFocusRing() {
1.178 + MOZ_COUNT_DTOR(nsDisplayRangeFocusRing);
1.179 + }
1.180 +#endif
1.181 +
1.182 + virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) MOZ_OVERRIDE;
1.183 + virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) MOZ_OVERRIDE;
1.184 + NS_DISPLAY_DECL_NAME("RangeFocusRing", TYPE_OUTLINE)
1.185 +};
1.186 +
1.187 +nsRect
1.188 +nsDisplayRangeFocusRing::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
1.189 +{
1.190 + *aSnap = false;
1.191 + nsRect rect(ToReferenceFrame(), Frame()->GetSize());
1.192 +
1.193 + // We want to paint as if specifying a border for ::-moz-focus-outer
1.194 + // specifies an outline for our frame, so inflate by the border widths:
1.195 + nsStyleContext* styleContext =
1.196 + static_cast<nsRangeFrame*>(mFrame)->mOuterFocusStyle;
1.197 + MOZ_ASSERT(styleContext, "We only exist if mOuterFocusStyle is non-null");
1.198 + rect.Inflate(styleContext->StyleBorder()->GetComputedBorder());
1.199 +
1.200 + return rect;
1.201 +}
1.202 +
1.203 +void
1.204 +nsDisplayRangeFocusRing::Paint(nsDisplayListBuilder* aBuilder,
1.205 + nsRenderingContext* aCtx)
1.206 +{
1.207 + bool unused;
1.208 + nsStyleContext* styleContext =
1.209 + static_cast<nsRangeFrame*>(mFrame)->mOuterFocusStyle;
1.210 + MOZ_ASSERT(styleContext, "We only exist if mOuterFocusStyle is non-null");
1.211 + nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame,
1.212 + mVisibleRect, GetBounds(aBuilder, &unused),
1.213 + styleContext);
1.214 +}
1.215 +
1.216 +void
1.217 +nsRangeFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.218 + const nsRect& aDirtyRect,
1.219 + const nsDisplayListSet& aLists)
1.220 +{
1.221 + if (IsThemed()) {
1.222 + DisplayBorderBackgroundOutline(aBuilder, aLists);
1.223 + // Only create items for the thumb. Specifically, we do not want
1.224 + // the track to paint, since *our* background is used to paint
1.225 + // the track, and we don't want the unthemed track painting over
1.226 + // the top of the themed track.
1.227 + // This logic is copied from
1.228 + // nsContainerFrame::BuildDisplayListForNonBlockChildren as
1.229 + // called by BuildDisplayListForInline.
1.230 + nsIFrame* thumb = mThumbDiv->GetPrimaryFrame();
1.231 + if (thumb) {
1.232 + nsDisplayListSet set(aLists, aLists.Content());
1.233 + BuildDisplayListForChild(aBuilder, thumb, aDirtyRect, set, DISPLAY_CHILD_INLINE);
1.234 + }
1.235 + } else {
1.236 + BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
1.237 + }
1.238 +
1.239 + // Draw a focus outline if appropriate:
1.240 +
1.241 + if (!aBuilder->IsForPainting() ||
1.242 + !IsVisibleForPainting(aBuilder)) {
1.243 + // we don't want the focus ring item for hit-testing or if the item isn't
1.244 + // in the area being [re]painted
1.245 + return;
1.246 + }
1.247 +
1.248 + EventStates eventStates = mContent->AsElement()->State();
1.249 + if (eventStates.HasState(NS_EVENT_STATE_DISABLED) ||
1.250 + !eventStates.HasState(NS_EVENT_STATE_FOCUSRING)) {
1.251 + return; // can't have focus or doesn't match :-moz-focusring
1.252 + }
1.253 +
1.254 + if (!mOuterFocusStyle ||
1.255 + !mOuterFocusStyle->StyleBorder()->HasBorder()) {
1.256 + // no ::-moz-focus-outer specified border (how style specifies a focus ring
1.257 + // for range)
1.258 + return;
1.259 + }
1.260 +
1.261 + const nsStyleDisplay *disp = StyleDisplay();
1.262 + if (IsThemed(disp) &&
1.263 + PresContext()->GetTheme()->ThemeDrawsFocusForWidget(disp->mAppearance)) {
1.264 + return; // the native theme displays its own visual indication of focus
1.265 + }
1.266 +
1.267 + aLists.Content()->AppendNewToTop(
1.268 + new (aBuilder) nsDisplayRangeFocusRing(aBuilder, this));
1.269 +}
1.270 +
1.271 +nsresult
1.272 +nsRangeFrame::Reflow(nsPresContext* aPresContext,
1.273 + nsHTMLReflowMetrics& aDesiredSize,
1.274 + const nsHTMLReflowState& aReflowState,
1.275 + nsReflowStatus& aStatus)
1.276 +{
1.277 + DO_GLOBAL_REFLOW_COUNT("nsRangeFrame");
1.278 + DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
1.279 +
1.280 + NS_ASSERTION(mTrackDiv, "::-moz-range-track div must exist!");
1.281 + NS_ASSERTION(mProgressDiv, "::-moz-range-progress div must exist!");
1.282 + NS_ASSERTION(mThumbDiv, "::-moz-range-thumb div must exist!");
1.283 + NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
1.284 + "nsRangeFrame should not have continuations; if it does we "
1.285 + "need to call RegUnregAccessKey only for the first.");
1.286 +
1.287 + if (mState & NS_FRAME_FIRST_REFLOW) {
1.288 + nsFormControlFrame::RegUnRegAccessKey(this, true);
1.289 + }
1.290 +
1.291 + nscoord computedHeight = aReflowState.ComputedHeight();
1.292 + if (computedHeight == NS_AUTOHEIGHT) {
1.293 + computedHeight = 0;
1.294 + }
1.295 + aDesiredSize.Width() = aReflowState.ComputedWidth() +
1.296 + aReflowState.ComputedPhysicalBorderPadding().LeftRight();
1.297 + aDesiredSize.Height() = computedHeight +
1.298 + aReflowState.ComputedPhysicalBorderPadding().TopBottom();
1.299 +
1.300 + nsresult rv =
1.301 + ReflowAnonymousContent(aPresContext, aDesiredSize, aReflowState);
1.302 + NS_ENSURE_SUCCESS(rv, rv);
1.303 +
1.304 + aDesiredSize.SetOverflowAreasToDesiredBounds();
1.305 +
1.306 + nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
1.307 + if (trackFrame) {
1.308 + ConsiderChildOverflow(aDesiredSize.mOverflowAreas, trackFrame);
1.309 + }
1.310 +
1.311 + nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
1.312 + if (rangeProgressFrame) {
1.313 + ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rangeProgressFrame);
1.314 + }
1.315 +
1.316 + nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
1.317 + if (thumbFrame) {
1.318 + ConsiderChildOverflow(aDesiredSize.mOverflowAreas, thumbFrame);
1.319 + }
1.320 +
1.321 + FinishAndStoreOverflow(&aDesiredSize);
1.322 +
1.323 + aStatus = NS_FRAME_COMPLETE;
1.324 +
1.325 + NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
1.326 +
1.327 + return NS_OK;
1.328 +}
1.329 +
1.330 +nsresult
1.331 +nsRangeFrame::ReflowAnonymousContent(nsPresContext* aPresContext,
1.332 + nsHTMLReflowMetrics& aDesiredSize,
1.333 + const nsHTMLReflowState& aReflowState)
1.334 +{
1.335 + // The width/height of our content box, which is the available width/height
1.336 + // for our anonymous content:
1.337 + nscoord rangeFrameContentBoxWidth = aReflowState.ComputedWidth();
1.338 + nscoord rangeFrameContentBoxHeight = aReflowState.ComputedHeight();
1.339 + if (rangeFrameContentBoxHeight == NS_AUTOHEIGHT) {
1.340 + rangeFrameContentBoxHeight = 0;
1.341 + }
1.342 +
1.343 + nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
1.344 +
1.345 + if (trackFrame) { // display:none?
1.346 +
1.347 + // Position the track:
1.348 + // The idea here is that we allow content authors to style the width,
1.349 + // height, border and padding of the track, but we ignore margin and
1.350 + // positioning properties and do the positioning ourself to keep the center
1.351 + // of the track's border box on the center of the nsRangeFrame's content
1.352 + // box.
1.353 +
1.354 + nsHTMLReflowState trackReflowState(aPresContext, aReflowState, trackFrame,
1.355 + nsSize(aReflowState.ComputedWidth(),
1.356 + NS_UNCONSTRAINEDSIZE));
1.357 +
1.358 + // Find the x/y position of the track frame such that it will be positioned
1.359 + // as described above. These coordinates are with respect to the
1.360 + // nsRangeFrame's border-box.
1.361 + nscoord trackX = rangeFrameContentBoxWidth / 2;
1.362 + nscoord trackY = rangeFrameContentBoxHeight / 2;
1.363 +
1.364 + // Account for the track's border and padding (we ignore its margin):
1.365 + trackX -= trackReflowState.ComputedPhysicalBorderPadding().left +
1.366 + trackReflowState.ComputedWidth() / 2;
1.367 + trackY -= trackReflowState.ComputedPhysicalBorderPadding().top +
1.368 + trackReflowState.ComputedHeight() / 2;
1.369 +
1.370 + // Make relative to our border box instead of our content box:
1.371 + trackX += aReflowState.ComputedPhysicalBorderPadding().left;
1.372 + trackY += aReflowState.ComputedPhysicalBorderPadding().top;
1.373 +
1.374 + nsReflowStatus frameStatus;
1.375 + nsHTMLReflowMetrics trackDesiredSize(aReflowState);
1.376 + nsresult rv = ReflowChild(trackFrame, aPresContext, trackDesiredSize,
1.377 + trackReflowState, trackX, trackY, 0, frameStatus);
1.378 + NS_ENSURE_SUCCESS(rv, rv);
1.379 + MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
1.380 + "We gave our child unconstrained height, so it should be complete");
1.381 + rv = FinishReflowChild(trackFrame, aPresContext, trackDesiredSize,
1.382 + &trackReflowState, trackX, trackY, 0);
1.383 + NS_ENSURE_SUCCESS(rv, rv);
1.384 + }
1.385 +
1.386 + nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
1.387 +
1.388 + if (thumbFrame) { // display:none?
1.389 + nsHTMLReflowState thumbReflowState(aPresContext, aReflowState, thumbFrame,
1.390 + nsSize(aReflowState.ComputedWidth(),
1.391 + NS_UNCONSTRAINEDSIZE));
1.392 +
1.393 + // Where we position the thumb depends on its size, so we first reflow
1.394 + // the thumb at {0,0} to obtain its size, then position it afterwards.
1.395 +
1.396 + nsReflowStatus frameStatus;
1.397 + nsHTMLReflowMetrics thumbDesiredSize(aReflowState);
1.398 + nsresult rv = ReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
1.399 + thumbReflowState, 0, 0, 0, frameStatus);
1.400 + NS_ENSURE_SUCCESS(rv, rv);
1.401 + MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
1.402 + "We gave our child unconstrained height, so it should be complete");
1.403 + rv = FinishReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
1.404 + &thumbReflowState, 0, 0, 0);
1.405 + NS_ENSURE_SUCCESS(rv, rv);
1.406 +
1.407 + DoUpdateThumbPosition(thumbFrame, nsSize(aDesiredSize.Width(),
1.408 + aDesiredSize.Height()));
1.409 + }
1.410 +
1.411 + nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
1.412 +
1.413 + if (rangeProgressFrame) { // display:none?
1.414 + nsHTMLReflowState progressReflowState(aPresContext, aReflowState,
1.415 + rangeProgressFrame,
1.416 + nsSize(aReflowState.ComputedWidth(),
1.417 + NS_UNCONSTRAINEDSIZE));
1.418 +
1.419 + // We first reflow the range-progress frame at {0,0} to obtain its
1.420 + // unadjusted dimensions, then we adjust it to so that the appropriate edge
1.421 + // ends at the thumb.
1.422 +
1.423 + nsReflowStatus frameStatus;
1.424 + nsHTMLReflowMetrics progressDesiredSize(aReflowState);
1.425 + nsresult rv = ReflowChild(rangeProgressFrame, aPresContext,
1.426 + progressDesiredSize, progressReflowState, 0, 0,
1.427 + 0, frameStatus);
1.428 + NS_ENSURE_SUCCESS(rv, rv);
1.429 + MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
1.430 + "We gave our child unconstrained height, so it should be complete");
1.431 + rv = FinishReflowChild(rangeProgressFrame, aPresContext,
1.432 + progressDesiredSize, &progressReflowState, 0, 0, 0);
1.433 + NS_ENSURE_SUCCESS(rv, rv);
1.434 +
1.435 + DoUpdateRangeProgressFrame(rangeProgressFrame, nsSize(aDesiredSize.Width(),
1.436 + aDesiredSize.Height()));
1.437 + }
1.438 +
1.439 + return NS_OK;
1.440 +}
1.441 +
1.442 +#ifdef ACCESSIBILITY
1.443 +a11y::AccType
1.444 +nsRangeFrame::AccessibleType()
1.445 +{
1.446 + return a11y::eHTMLRangeType;
1.447 +}
1.448 +#endif
1.449 +
1.450 +double
1.451 +nsRangeFrame::GetValueAsFractionOfRange()
1.452 +{
1.453 + MOZ_ASSERT(mContent->IsHTML(nsGkAtoms::input), "bad cast");
1.454 + dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
1.455 +
1.456 + MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
1.457 +
1.458 + Decimal value = input->GetValueAsDecimal();
1.459 + Decimal minimum = input->GetMinimum();
1.460 + Decimal maximum = input->GetMaximum();
1.461 +
1.462 + MOZ_ASSERT(value.isFinite() && minimum.isFinite() && maximum.isFinite(),
1.463 + "type=range should have a default maximum/minimum");
1.464 +
1.465 + if (maximum <= minimum) {
1.466 + MOZ_ASSERT(value == minimum, "Unsanitized value");
1.467 + return 0.0;
1.468 + }
1.469 +
1.470 + MOZ_ASSERT(value >= minimum && value <= maximum, "Unsanitized value");
1.471 +
1.472 + return ((value - minimum) / (maximum - minimum)).toDouble();
1.473 +}
1.474 +
1.475 +Decimal
1.476 +nsRangeFrame::GetValueAtEventPoint(WidgetGUIEvent* aEvent)
1.477 +{
1.478 + MOZ_ASSERT(aEvent->eventStructType == NS_MOUSE_EVENT ||
1.479 + aEvent->eventStructType == NS_TOUCH_EVENT,
1.480 + "Unexpected event type - aEvent->refPoint may be meaningless");
1.481 +
1.482 + MOZ_ASSERT(mContent->IsHTML(nsGkAtoms::input), "bad cast");
1.483 + dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
1.484 +
1.485 + MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
1.486 +
1.487 + Decimal minimum = input->GetMinimum();
1.488 + Decimal maximum = input->GetMaximum();
1.489 + MOZ_ASSERT(minimum.isFinite() && maximum.isFinite(),
1.490 + "type=range should have a default maximum/minimum");
1.491 + if (maximum <= minimum) {
1.492 + return minimum;
1.493 + }
1.494 + Decimal range = maximum - minimum;
1.495 +
1.496 + LayoutDeviceIntPoint absPoint;
1.497 + if (aEvent->eventStructType == NS_TOUCH_EVENT) {
1.498 + MOZ_ASSERT(aEvent->AsTouchEvent()->touches.Length() == 1,
1.499 + "Unexpected number of touches");
1.500 + absPoint = LayoutDeviceIntPoint::FromUntyped(
1.501 + aEvent->AsTouchEvent()->touches[0]->mRefPoint);
1.502 + } else {
1.503 + absPoint = aEvent->refPoint;
1.504 + }
1.505 + nsPoint point =
1.506 + nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent,
1.507 + LayoutDeviceIntPoint::ToUntyped(absPoint), this);
1.508 +
1.509 + if (point == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
1.510 + // We don't want to change the current value for this error state.
1.511 + return static_cast<dom::HTMLInputElement*>(mContent)->GetValueAsDecimal();
1.512 + }
1.513 +
1.514 + nsRect rangeContentRect = GetContentRectRelativeToSelf();
1.515 + nsSize thumbSize;
1.516 +
1.517 + if (IsThemed()) {
1.518 + // We need to get the size of the thumb from the theme.
1.519 + nsPresContext *presContext = PresContext();
1.520 + nsRefPtr<nsRenderingContext> tmpCtx =
1.521 + presContext->PresShell()->CreateReferenceRenderingContext();
1.522 + bool notUsedCanOverride;
1.523 + nsIntSize size;
1.524 + presContext->GetTheme()->
1.525 + GetMinimumWidgetSize(tmpCtx.get(), this, NS_THEME_RANGE_THUMB, &size,
1.526 + ¬UsedCanOverride);
1.527 + thumbSize.width = presContext->DevPixelsToAppUnits(size.width);
1.528 + thumbSize.height = presContext->DevPixelsToAppUnits(size.height);
1.529 + MOZ_ASSERT(thumbSize.width > 0 && thumbSize.height > 0);
1.530 + } else {
1.531 + nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
1.532 + if (thumbFrame) { // diplay:none?
1.533 + thumbSize = thumbFrame->GetSize();
1.534 + }
1.535 + }
1.536 +
1.537 + Decimal fraction;
1.538 + if (IsHorizontal()) {
1.539 + nscoord traversableDistance = rangeContentRect.width - thumbSize.width;
1.540 + if (traversableDistance <= 0) {
1.541 + return minimum;
1.542 + }
1.543 + nscoord posAtStart = rangeContentRect.x + thumbSize.width/2;
1.544 + nscoord posAtEnd = posAtStart + traversableDistance;
1.545 + nscoord posOfPoint = mozilla::clamped(point.x, posAtStart, posAtEnd);
1.546 + fraction = Decimal(posOfPoint - posAtStart) / traversableDistance;
1.547 + if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
1.548 + fraction = Decimal(1) - fraction;
1.549 + }
1.550 + } else {
1.551 + nscoord traversableDistance = rangeContentRect.height - thumbSize.height;
1.552 + if (traversableDistance <= 0) {
1.553 + return minimum;
1.554 + }
1.555 + nscoord posAtStart = rangeContentRect.y + thumbSize.height/2;
1.556 + nscoord posAtEnd = posAtStart + traversableDistance;
1.557 + nscoord posOfPoint = mozilla::clamped(point.y, posAtStart, posAtEnd);
1.558 + // For a vertical range, the top (posAtStart) is the highest value, so we
1.559 + // subtract the fraction from 1.0 to get that polarity correct.
1.560 + fraction = Decimal(1) - Decimal(posOfPoint - posAtStart) / traversableDistance;
1.561 + }
1.562 +
1.563 + MOZ_ASSERT(fraction >= 0 && fraction <= 1);
1.564 + return minimum + fraction * range;
1.565 +}
1.566 +
1.567 +void
1.568 +nsRangeFrame::UpdateForValueChange()
1.569 +{
1.570 + if (NS_SUBTREE_DIRTY(this)) {
1.571 + return; // we're going to be updated when we reflow
1.572 + }
1.573 + nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
1.574 + nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
1.575 + if (!rangeProgressFrame && !thumbFrame) {
1.576 + return; // diplay:none?
1.577 + }
1.578 + if (rangeProgressFrame) {
1.579 + DoUpdateRangeProgressFrame(rangeProgressFrame, GetSize());
1.580 + }
1.581 + if (thumbFrame) {
1.582 + DoUpdateThumbPosition(thumbFrame, GetSize());
1.583 + }
1.584 + if (IsThemed()) {
1.585 + // We don't know the exact dimensions or location of the thumb when native
1.586 + // theming is applied, so we just repaint the entire range.
1.587 + InvalidateFrame();
1.588 + }
1.589 +
1.590 +#ifdef ACCESSIBILITY
1.591 + nsAccessibilityService* accService = nsIPresShell::AccService();
1.592 + if (accService) {
1.593 + accService->RangeValueChanged(PresContext()->PresShell(), mContent);
1.594 + }
1.595 +#endif
1.596 +
1.597 + SchedulePaint();
1.598 +}
1.599 +
1.600 +void
1.601 +nsRangeFrame::DoUpdateThumbPosition(nsIFrame* aThumbFrame,
1.602 + const nsSize& aRangeSize)
1.603 +{
1.604 + MOZ_ASSERT(aThumbFrame);
1.605 +
1.606 + // The idea here is that we want to position the thumb so that the center
1.607 + // of the thumb is on an imaginary line drawn from the middle of one edge
1.608 + // of the range frame's content box to the middle of the opposite edge of
1.609 + // its content box (the opposite edges being the left/right edge if the
1.610 + // range is horizontal, or else the top/bottom edges if the range is
1.611 + // vertical). How far along this line the center of the thumb is placed
1.612 + // depends on the value of the range.
1.613 +
1.614 + nsMargin borderAndPadding = GetUsedBorderAndPadding();
1.615 + nsPoint newPosition(borderAndPadding.left, borderAndPadding.top);
1.616 +
1.617 + nsSize rangeContentBoxSize(aRangeSize);
1.618 + rangeContentBoxSize.width -= borderAndPadding.LeftRight();
1.619 + rangeContentBoxSize.height -= borderAndPadding.TopBottom();
1.620 +
1.621 + nsSize thumbSize = aThumbFrame->GetSize();
1.622 + double fraction = GetValueAsFractionOfRange();
1.623 + MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
1.624 +
1.625 + // We are called under Reflow, so we need to pass IsHorizontal a valid rect.
1.626 + nsSize frameSizeOverride(aRangeSize.width, aRangeSize.height);
1.627 + if (IsHorizontal(&frameSizeOverride)) {
1.628 + if (thumbSize.width < rangeContentBoxSize.width) {
1.629 + nscoord traversableDistance =
1.630 + rangeContentBoxSize.width - thumbSize.width;
1.631 + if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
1.632 + newPosition.x += NSToCoordRound((1.0 - fraction) * traversableDistance);
1.633 + } else {
1.634 + newPosition.x += NSToCoordRound(fraction * traversableDistance);
1.635 + }
1.636 + newPosition.y += (rangeContentBoxSize.height - thumbSize.height)/2;
1.637 + }
1.638 + } else {
1.639 + if (thumbSize.height < rangeContentBoxSize.height) {
1.640 + nscoord traversableDistance =
1.641 + rangeContentBoxSize.height - thumbSize.height;
1.642 + newPosition.x += (rangeContentBoxSize.width - thumbSize.width)/2;
1.643 + newPosition.y += NSToCoordRound((1.0 - fraction) * traversableDistance);
1.644 + }
1.645 + }
1.646 + aThumbFrame->SetPosition(newPosition);
1.647 +}
1.648 +
1.649 +void
1.650 +nsRangeFrame::DoUpdateRangeProgressFrame(nsIFrame* aRangeProgressFrame,
1.651 + const nsSize& aRangeSize)
1.652 +{
1.653 + MOZ_ASSERT(aRangeProgressFrame);
1.654 +
1.655 + // The idea here is that we want to position the ::-moz-range-progress
1.656 + // pseudo-element so that the center line running along its length is on the
1.657 + // corresponding center line of the nsRangeFrame's content box. In the other
1.658 + // dimension, we align the "start" edge of the ::-moz-range-progress
1.659 + // pseudo-element's border-box with the corresponding edge of the
1.660 + // nsRangeFrame's content box, and we size the progress element's border-box
1.661 + // to have a length of GetValueAsFractionOfRange() times the nsRangeFrame's
1.662 + // content-box size.
1.663 +
1.664 + nsMargin borderAndPadding = GetUsedBorderAndPadding();
1.665 + nsSize progSize = aRangeProgressFrame->GetSize();
1.666 + nsRect progRect(borderAndPadding.left, borderAndPadding.top,
1.667 + progSize.width, progSize.height);
1.668 +
1.669 + nsSize rangeContentBoxSize(aRangeSize);
1.670 + rangeContentBoxSize.width -= borderAndPadding.LeftRight();
1.671 + rangeContentBoxSize.height -= borderAndPadding.TopBottom();
1.672 +
1.673 + double fraction = GetValueAsFractionOfRange();
1.674 + MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
1.675 +
1.676 + // We are called under Reflow, so we need to pass IsHorizontal a valid rect.
1.677 + nsSize frameSizeOverride(aRangeSize.width, aRangeSize.height);
1.678 + if (IsHorizontal(&frameSizeOverride)) {
1.679 + nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.width);
1.680 + if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
1.681 + progRect.x += rangeContentBoxSize.width - progLength;
1.682 + }
1.683 + progRect.y += (rangeContentBoxSize.height - progSize.height)/2;
1.684 + progRect.width = progLength;
1.685 + } else {
1.686 + nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.height);
1.687 + progRect.x += (rangeContentBoxSize.width - progSize.width)/2;
1.688 + progRect.y += rangeContentBoxSize.height - progLength;
1.689 + progRect.height = progLength;
1.690 + }
1.691 + aRangeProgressFrame->SetRect(progRect);
1.692 +}
1.693 +
1.694 +nsresult
1.695 +nsRangeFrame::AttributeChanged(int32_t aNameSpaceID,
1.696 + nsIAtom* aAttribute,
1.697 + int32_t aModType)
1.698 +{
1.699 + NS_ASSERTION(mTrackDiv, "The track div must exist!");
1.700 + NS_ASSERTION(mThumbDiv, "The thumb div must exist!");
1.701 +
1.702 + if (aNameSpaceID == kNameSpaceID_None) {
1.703 + if (aAttribute == nsGkAtoms::value ||
1.704 + aAttribute == nsGkAtoms::min ||
1.705 + aAttribute == nsGkAtoms::max ||
1.706 + aAttribute == nsGkAtoms::step) {
1.707 + // We want to update the position of the thumb, except in one special
1.708 + // case: If the value attribute is being set, it is possible that we are
1.709 + // in the middle of a type change away from type=range, under the
1.710 + // SetAttr(..., nsGkAtoms::value, ...) call in HTMLInputElement::
1.711 + // HandleTypeChange. In that case the HTMLInputElement's type will
1.712 + // already have changed, and if we call UpdateForValueChange()
1.713 + // we'll fail the asserts under that call that check the type of our
1.714 + // HTMLInputElement. Given that we're changing away from being a range
1.715 + // and this frame will shortly be destroyed, there's no point in calling
1.716 + // UpdateForValueChange() anyway.
1.717 + MOZ_ASSERT(mContent->IsHTML(nsGkAtoms::input), "bad cast");
1.718 + bool typeIsRange = static_cast<dom::HTMLInputElement*>(mContent)->GetType() ==
1.719 + NS_FORM_INPUT_RANGE;
1.720 + // If script changed the <input>'s type before setting these attributes
1.721 + // then we don't need to do anything since we are going to be reframed.
1.722 + if (typeIsRange) {
1.723 + UpdateForValueChange();
1.724 + }
1.725 + } else if (aAttribute == nsGkAtoms::orient) {
1.726 + PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eResize,
1.727 + NS_FRAME_IS_DIRTY);
1.728 + }
1.729 + }
1.730 +
1.731 + return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
1.732 +}
1.733 +
1.734 +nsSize
1.735 +nsRangeFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
1.736 + nsSize aCBSize, nscoord aAvailableWidth,
1.737 + nsSize aMargin, nsSize aBorder,
1.738 + nsSize aPadding, bool aShrinkWrap)
1.739 +{
1.740 + nscoord oneEm = NSToCoordRound(StyleFont()->mFont.size *
1.741 + nsLayoutUtils::FontSizeInflationFor(this)); // 1em
1.742 +
1.743 + // frameSizeOverride values just gets us to fall back to being horizontal
1.744 + // (the actual values are irrelevant, as long as width > height):
1.745 + nsSize frameSizeOverride(10,1);
1.746 + bool isHorizontal = IsHorizontal(&frameSizeOverride);
1.747 +
1.748 + nsSize autoSize;
1.749 +
1.750 + // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
1.751 + // given too small a size when we're natively themed. If we're themed, we set
1.752 + // our "thickness" dimension to zero below and rely on that
1.753 + // GetMinimumWidgetSize check to correct that dimension to the natural
1.754 + // thickness of a slider in the current theme.
1.755 +
1.756 + if (isHorizontal) {
1.757 + autoSize.width = LONG_SIDE_TO_SHORT_SIDE_RATIO * oneEm;
1.758 + autoSize.height = IsThemed() ? 0 : oneEm;
1.759 + } else {
1.760 + autoSize.width = IsThemed() ? 0 : oneEm;
1.761 + autoSize.height = LONG_SIDE_TO_SHORT_SIDE_RATIO * oneEm;
1.762 + }
1.763 +
1.764 + return autoSize;
1.765 +}
1.766 +
1.767 +nscoord
1.768 +nsRangeFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
1.769 +{
1.770 + // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
1.771 + // given too small a size when we're natively themed. If we aren't native
1.772 + // themed, we don't mind how small we're sized.
1.773 + return nscoord(0);
1.774 +}
1.775 +
1.776 +nscoord
1.777 +nsRangeFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
1.778 +{
1.779 + // frameSizeOverride values just gets us to fall back to being horizontal:
1.780 + nsSize frameSizeOverride(10,1);
1.781 + bool isHorizontal = IsHorizontal(&frameSizeOverride);
1.782 +
1.783 + if (!isHorizontal && IsThemed()) {
1.784 + // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
1.785 + // given too small a size when we're natively themed. We return zero and
1.786 + // depend on that correction to get our "natuaral" width when we're a
1.787 + // vertical slider.
1.788 + return 0;
1.789 + }
1.790 +
1.791 + nscoord prefWidth = NSToCoordRound(StyleFont()->mFont.size *
1.792 + nsLayoutUtils::FontSizeInflationFor(this)); // 1em
1.793 +
1.794 + if (isHorizontal) {
1.795 + prefWidth *= LONG_SIDE_TO_SHORT_SIDE_RATIO;
1.796 + }
1.797 +
1.798 + return prefWidth;
1.799 +}
1.800 +
1.801 +bool
1.802 +nsRangeFrame::IsHorizontal(const nsSize *aFrameSizeOverride) const
1.803 +{
1.804 + dom::HTMLInputElement* element = static_cast<dom::HTMLInputElement*>(mContent);
1.805 + return !element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
1.806 + nsGkAtoms::vertical, eCaseMatters);
1.807 +}
1.808 +
1.809 +double
1.810 +nsRangeFrame::GetMin() const
1.811 +{
1.812 + return static_cast<dom::HTMLInputElement*>(mContent)->GetMinimum().toDouble();
1.813 +}
1.814 +
1.815 +double
1.816 +nsRangeFrame::GetMax() const
1.817 +{
1.818 + return static_cast<dom::HTMLInputElement*>(mContent)->GetMaximum().toDouble();
1.819 +}
1.820 +
1.821 +double
1.822 +nsRangeFrame::GetValue() const
1.823 +{
1.824 + return static_cast<dom::HTMLInputElement*>(mContent)->GetValueAsDecimal().toDouble();
1.825 +}
1.826 +
1.827 +nsIAtom*
1.828 +nsRangeFrame::GetType() const
1.829 +{
1.830 + return nsGkAtoms::rangeFrame;
1.831 +}
1.832 +
1.833 +#define STYLES_DISABLING_NATIVE_THEMING \
1.834 + NS_AUTHOR_SPECIFIED_BACKGROUND | \
1.835 + NS_AUTHOR_SPECIFIED_PADDING | \
1.836 + NS_AUTHOR_SPECIFIED_BORDER
1.837 +
1.838 +bool
1.839 +nsRangeFrame::ShouldUseNativeStyle() const
1.840 +{
1.841 + return (StyleDisplay()->mAppearance == NS_THEME_RANGE) &&
1.842 + !PresContext()->HasAuthorSpecifiedRules(const_cast<nsRangeFrame*>(this),
1.843 + (NS_AUTHOR_SPECIFIED_BORDER |
1.844 + NS_AUTHOR_SPECIFIED_BACKGROUND)) &&
1.845 + !PresContext()->HasAuthorSpecifiedRules(mTrackDiv->GetPrimaryFrame(),
1.846 + STYLES_DISABLING_NATIVE_THEMING) &&
1.847 + !PresContext()->HasAuthorSpecifiedRules(mProgressDiv->GetPrimaryFrame(),
1.848 + STYLES_DISABLING_NATIVE_THEMING) &&
1.849 + !PresContext()->HasAuthorSpecifiedRules(mThumbDiv->GetPrimaryFrame(),
1.850 + STYLES_DISABLING_NATIVE_THEMING);
1.851 +}
1.852 +
1.853 +Element*
1.854 +nsRangeFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)
1.855 +{
1.856 + if (aType == nsCSSPseudoElements::ePseudo_mozRangeTrack) {
1.857 + return mTrackDiv;
1.858 + }
1.859 +
1.860 + if (aType == nsCSSPseudoElements::ePseudo_mozRangeThumb) {
1.861 + return mThumbDiv;
1.862 + }
1.863 +
1.864 + if (aType == nsCSSPseudoElements::ePseudo_mozRangeProgress) {
1.865 + return mProgressDiv;
1.866 + }
1.867 +
1.868 + return nsContainerFrame::GetPseudoElement(aType);
1.869 +}
1.870 +
1.871 +nsStyleContext*
1.872 +nsRangeFrame::GetAdditionalStyleContext(int32_t aIndex) const
1.873 +{
1.874 + // We only implement this so that SetAdditionalStyleContext will be
1.875 + // called if style changes that would change the -moz-focus-outer
1.876 + // pseudo-element have occurred.
1.877 + return aIndex == 0 ? mOuterFocusStyle : nullptr;
1.878 +}
1.879 +
1.880 +void
1.881 +nsRangeFrame::SetAdditionalStyleContext(int32_t aIndex,
1.882 + nsStyleContext* aStyleContext)
1.883 +{
1.884 + MOZ_ASSERT(aIndex == 0,
1.885 + "GetAdditionalStyleContext is handling other indexes?");
1.886 +
1.887 + // The -moz-focus-outer pseudo-element's style has changed.
1.888 + mOuterFocusStyle = aStyleContext;
1.889 +}
