1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "nsNativeTheme.h"
8 #include "mozilla/dom/Document.h"
9 #include "nsIContent.h"
11 #include "nsIScrollableFrame.h"
12 #include "nsLayoutUtils.h"
13 #include "nsNumberControlFrame.h"
14 #include "nsPresContext.h"
16 #include "nsNameSpaceManager.h"
17 #include "nsStyleConsts.h"
18 #include "nsPIDOMWindow.h"
19 #include "nsProgressFrame.h"
20 #include "nsMeterFrame.h"
21 #include "nsMenuFrame.h"
22 #include "nsRangeFrame.h"
23 #include "nsCSSRendering.h"
24 #include "ImageContainer.h"
25 #include "mozilla/ComputedStyle.h"
26 #include "mozilla/EventStates.h"
27 #include "mozilla/dom/Element.h"
28 #include "mozilla/dom/HTMLBodyElement.h"
29 #include "mozilla/dom/HTMLInputElement.h"
30 #include "mozilla/dom/HTMLProgressElement.h"
31 #include "mozilla/PresShell.h"
32 #include "mozilla/StaticPrefs_layout.h"
33 #include "mozilla/dom/DocumentInlines.h"
34 #include "mozilla/RelativeLuminanceUtils.h"
37 using namespace mozilla
;
38 using namespace mozilla::dom
;
40 nsNativeTheme::nsNativeTheme() : mAnimatedContentTimeout(UINT32_MAX
) {}
42 NS_IMPL_ISUPPORTS(nsNativeTheme
, nsITimerCallback
, nsINamed
)
44 /* static */ EventStates
nsNativeTheme::GetContentState(
45 nsIFrame
* aFrame
, StyleAppearance aAppearance
) {
50 nsIContent
* frameContent
= aFrame
->GetContent();
51 if (!frameContent
|| !frameContent
->IsElement()) {
55 const bool isXULElement
= frameContent
->IsXULElement();
57 if (aAppearance
== StyleAppearance::CheckboxLabel
||
58 aAppearance
== StyleAppearance::RadioLabel
) {
59 aFrame
= aFrame
->GetParent()->GetParent();
60 frameContent
= aFrame
->GetContent();
61 } else if (aAppearance
== StyleAppearance::Checkbox
||
62 aAppearance
== StyleAppearance::Radio
||
63 aAppearance
== StyleAppearance::ToolbarbuttonDropdown
||
64 aAppearance
== StyleAppearance::Treeheadersortarrow
||
65 aAppearance
== StyleAppearance::ButtonArrowPrevious
||
66 aAppearance
== StyleAppearance::ButtonArrowNext
||
67 aAppearance
== StyleAppearance::ButtonArrowUp
||
68 aAppearance
== StyleAppearance::ButtonArrowDown
) {
69 aFrame
= aFrame
->GetParent();
70 frameContent
= aFrame
->GetContent();
72 MOZ_ASSERT(frameContent
&& frameContent
->IsElement());
75 EventStates flags
= frameContent
->AsElement()->State();
76 nsNumberControlFrame
* numberControlFrame
=
77 nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame
);
78 if (numberControlFrame
&&
79 numberControlFrame
->GetContent()->AsElement()->State().HasState(
80 NS_EVENT_STATE_DISABLED
)) {
81 flags
|= NS_EVENT_STATE_DISABLED
;
88 if (CheckBooleanAttr(aFrame
, nsGkAtoms::disabled
)) {
89 flags
|= NS_EVENT_STATE_DISABLED
;
92 switch (aAppearance
) {
93 case StyleAppearance::RadioLabel
:
94 case StyleAppearance::Radio
: {
95 if (CheckBooleanAttr(aFrame
, nsGkAtoms::focused
)) {
96 flags
|= NS_EVENT_STATE_FOCUS
;
97 nsPIDOMWindowOuter
* window
=
98 aFrame
->GetContent()->OwnerDoc()->GetWindow();
99 if (window
&& window
->ShouldShowFocusRing()) {
100 flags
|= NS_EVENT_STATE_FOCUSRING
;
103 if (CheckBooleanAttr(aFrame
, nsGkAtoms::selected
)) {
104 flags
|= NS_EVENT_STATE_CHECKED
;
108 case StyleAppearance::CheckboxLabel
:
109 case StyleAppearance::Checkbox
: {
110 if (CheckBooleanAttr(aFrame
, nsGkAtoms::checked
)) {
111 flags
|= NS_EVENT_STATE_CHECKED
;
112 } else if (CheckBooleanAttr(aFrame
, nsGkAtoms::indeterminate
)) {
113 flags
|= NS_EVENT_STATE_INDETERMINATE
;
117 case StyleAppearance::MenulistButton
:
118 case StyleAppearance::Menulist
:
119 case StyleAppearance::NumberInput
:
120 case StyleAppearance::Textfield
:
121 case StyleAppearance::Searchfield
:
122 case StyleAppearance::Textarea
: {
123 if (CheckBooleanAttr(aFrame
, nsGkAtoms::focused
)) {
124 flags
|= NS_EVENT_STATE_FOCUS
| NS_EVENT_STATE_FOCUSRING
;
136 bool nsNativeTheme::CheckBooleanAttr(nsIFrame
* aFrame
, nsAtom
* aAtom
) {
137 if (!aFrame
) return false;
139 nsIContent
* content
= aFrame
->GetContent();
140 if (!content
|| !content
->IsElement()) return false;
142 if (content
->IsHTMLElement())
143 return content
->AsElement()->HasAttr(kNameSpaceID_None
, aAtom
);
145 // For XML/XUL elements, an attribute must be equal to the literal
146 // string "true" to be counted as true. An empty string should _not_
147 // be counted as true.
148 return content
->AsElement()->AttrValueIs(kNameSpaceID_None
, aAtom
, u
"true"_ns
,
153 int32_t nsNativeTheme::CheckIntAttr(nsIFrame
* aFrame
, nsAtom
* aAtom
,
154 int32_t defaultValue
) {
155 if (!aFrame
) return defaultValue
;
157 nsIContent
* content
= aFrame
->GetContent();
158 if (!content
|| !content
->IsElement()) return defaultValue
;
161 content
->AsElement()->GetAttr(kNameSpaceID_None
, aAtom
, attr
);
163 int32_t value
= attr
.ToInteger(&err
);
164 if (attr
.IsEmpty() || NS_FAILED(err
)) return defaultValue
;
170 double nsNativeTheme::GetProgressValue(nsIFrame
* aFrame
) {
171 if (!aFrame
|| !aFrame
->GetContent()->IsHTMLElement(nsGkAtoms::progress
)) {
175 return static_cast<HTMLProgressElement
*>(aFrame
->GetContent())->Value();
179 double nsNativeTheme::GetProgressMaxValue(nsIFrame
* aFrame
) {
180 if (!aFrame
|| !aFrame
->GetContent()->IsHTMLElement(nsGkAtoms::progress
)) {
184 return static_cast<HTMLProgressElement
*>(aFrame
->GetContent())->Max();
187 bool nsNativeTheme::IsButtonTypeMenu(nsIFrame
* aFrame
) {
188 if (!aFrame
) return false;
190 nsIContent
* content
= aFrame
->GetContent();
191 return content
->IsXULElement(nsGkAtoms::button
) &&
192 content
->AsElement()->AttrValueIs(kNameSpaceID_None
, nsGkAtoms::type
,
193 u
"menu"_ns
, eCaseMatters
);
196 bool nsNativeTheme::IsPressedButton(nsIFrame
* aFrame
) {
197 EventStates eventState
=
198 GetContentState(aFrame
, StyleAppearance::Toolbarbutton
);
199 if (eventState
.HasState(NS_EVENT_STATE_DISABLED
)) return false;
201 return IsOpenButton(aFrame
) ||
202 eventState
.HasAllStates(NS_EVENT_STATE_ACTIVE
| NS_EVENT_STATE_HOVER
);
205 bool nsNativeTheme::IsWidgetStyled(nsPresContext
* aPresContext
,
207 StyleAppearance aAppearance
) {
208 // Check for specific widgets to see if HTML has overridden the style.
213 // Resizers have some special handling, dependent on whether in a scrollable
214 // container or not. If so, use the scrollable container's to determine
215 // whether the style is overriden instead of the resizer. This allows a
216 // non-native transparent resizer to be used instead. Otherwise, we just
217 // fall through and return false.
218 if (aAppearance
== StyleAppearance::Resizer
) {
219 nsIFrame
* parentFrame
= aFrame
->GetParent();
220 if (parentFrame
&& parentFrame
->IsScrollFrame()) {
221 // if the parent is a scrollframe, the resizer should be native themed
222 // only if the scrollable area doesn't override the widget style.
224 // note that the condition below looks a bit suspect but it's the right
225 // one. If there's no valid appearance, then we should return true, it's
226 // effectively the same as if it had overridden the appearance.
227 parentFrame
= parentFrame
->GetParent();
231 auto parentAppearance
=
232 parentFrame
->StyleDisplay()->EffectiveAppearance();
233 return parentAppearance
== StyleAppearance::None
||
234 IsWidgetStyled(aPresContext
, parentFrame
, parentAppearance
);
239 * Progress bar appearance should be the same for the bar and the container
240 * frame. nsProgressFrame owns the logic and will tell us what we should do.
242 if (aAppearance
== StyleAppearance::Progresschunk
||
243 aAppearance
== StyleAppearance::ProgressBar
) {
244 nsProgressFrame
* progressFrame
= do_QueryFrame(
245 aAppearance
== StyleAppearance::Progresschunk
? aFrame
->GetParent()
248 return !progressFrame
->ShouldUseNativeStyle();
253 * Meter bar appearance should be the same for the bar and the container
254 * frame. nsMeterFrame owns the logic and will tell us what we should do.
256 if (aAppearance
== StyleAppearance::Meterchunk
||
257 aAppearance
== StyleAppearance::Meter
) {
258 nsMeterFrame
* meterFrame
= do_QueryFrame(
259 aAppearance
== StyleAppearance::Meterchunk
? aFrame
->GetParent()
262 return !meterFrame
->ShouldUseNativeStyle();
267 * An nsRangeFrame and its children are treated atomically when it
268 * comes to native theming (either all parts, or no parts, are themed).
269 * nsRangeFrame owns the logic and will tell us what we should do.
271 if (aAppearance
== StyleAppearance::Range
||
272 aAppearance
== StyleAppearance::RangeThumb
) {
273 nsRangeFrame
* rangeFrame
= do_QueryFrame(
274 aAppearance
== StyleAppearance::RangeThumb
? aFrame
->GetParent()
277 return !rangeFrame
->ShouldUseNativeStyle();
281 return nsLayoutUtils::AuthorSpecifiedBorderBackgroundDisablesTheming(
283 aFrame
->GetContent()->IsHTMLElement() &&
284 aFrame
->Style()->HasAuthorSpecifiedBorderOrBackground();
288 bool nsNativeTheme::IsFrameRTL(nsIFrame
* aFrame
) {
292 return aFrame
->GetWritingMode().IsPhysicalRTL();
296 bool nsNativeTheme::IsHTMLContent(nsIFrame
* aFrame
) {
300 nsIContent
* content
= aFrame
->GetContent();
301 return content
&& content
->IsHTMLElement();
305 int32_t nsNativeTheme::GetScrollbarButtonType(nsIFrame
* aFrame
) {
306 if (!aFrame
) return 0;
308 static Element::AttrValuesArray strings
[] = {
309 nsGkAtoms::scrollbarDownBottom
, nsGkAtoms::scrollbarDownTop
,
310 nsGkAtoms::scrollbarUpBottom
, nsGkAtoms::scrollbarUpTop
, nullptr};
312 nsIContent
* content
= aFrame
->GetContent();
313 if (!content
|| !content
->IsElement()) {
317 switch (content
->AsElement()->FindAttrValueIn(
318 kNameSpaceID_None
, nsGkAtoms::sbattr
, strings
, eCaseMatters
)) {
320 return eScrollbarButton_Down
| eScrollbarButton_Bottom
;
322 return eScrollbarButton_Down
;
324 return eScrollbarButton_Bottom
;
326 return eScrollbarButton_UpTop
;
333 nsNativeTheme::TreeSortDirection
nsNativeTheme::GetTreeSortDirection(
335 if (!aFrame
|| !aFrame
->GetContent()) return eTreeSortDirection_Natural
;
337 static Element::AttrValuesArray strings
[] = {nsGkAtoms::descending
,
338 nsGkAtoms::ascending
, nullptr};
340 nsIContent
* content
= aFrame
->GetContent();
341 if (content
->IsElement()) {
342 switch (content
->AsElement()->FindAttrValueIn(
343 kNameSpaceID_None
, nsGkAtoms::sortDirection
, strings
, eCaseMatters
)) {
345 return eTreeSortDirection_Descending
;
347 return eTreeSortDirection_Ascending
;
351 return eTreeSortDirection_Natural
;
354 bool nsNativeTheme::IsLastTreeHeaderCell(nsIFrame
* aFrame
) {
355 if (!aFrame
) return false;
357 // A tree column picker is always the last header cell.
358 if (aFrame
->GetContent()->IsXULElement(nsGkAtoms::treecolpicker
)) return true;
360 // Find the parent tree.
361 nsIContent
* parent
= aFrame
->GetContent()->GetParent();
362 while (parent
&& !parent
->IsXULElement(nsGkAtoms::tree
)) {
363 parent
= parent
->GetParent();
366 // If the column picker is visible, this can't be the last column.
367 if (parent
&& !parent
->AsElement()->AttrValueIs(kNameSpaceID_None
,
368 nsGkAtoms::hidecolumnpicker
,
369 u
"true"_ns
, eCaseMatters
))
372 while ((aFrame
= aFrame
->GetNextSibling())) {
373 if (aFrame
->GetRect().Width() > 0) return false;
379 bool nsNativeTheme::IsBottomTab(nsIFrame
* aFrame
) {
380 if (!aFrame
) return false;
382 nsAutoString classStr
;
383 if (aFrame
->GetContent()->IsElement()) {
384 aFrame
->GetContent()->AsElement()->GetAttr(kNameSpaceID_None
,
385 nsGkAtoms::_class
, classStr
);
387 // FIXME: This looks bogus, shouldn't this be looking at GetClasses()?
388 return !classStr
.IsEmpty() && classStr
.Find("tab-bottom") != kNotFound
;
391 bool nsNativeTheme::IsFirstTab(nsIFrame
* aFrame
) {
392 if (!aFrame
) return false;
394 for (nsIFrame
* first
: aFrame
->GetParent()->PrincipalChildList()) {
395 if (first
->GetRect().Width() > 0 &&
396 first
->GetContent()->IsXULElement(nsGkAtoms::tab
))
397 return (first
== aFrame
);
402 bool nsNativeTheme::IsHorizontal(nsIFrame
* aFrame
) {
403 if (!aFrame
) return false;
405 if (!aFrame
->GetContent()->IsElement()) return true;
407 return !aFrame
->GetContent()->AsElement()->AttrValueIs(
408 kNameSpaceID_None
, nsGkAtoms::orient
, nsGkAtoms::vertical
, eCaseMatters
);
411 bool nsNativeTheme::IsNextToSelectedTab(nsIFrame
* aFrame
, int32_t aOffset
) {
412 if (!aFrame
) return false;
414 if (aOffset
== 0) return IsSelectedTab(aFrame
);
416 int32_t thisTabIndex
= -1, selectedTabIndex
= -1;
418 nsIFrame
* currentTab
= aFrame
->GetParent()->PrincipalChildList().FirstChild();
419 for (int32_t i
= 0; currentTab
; currentTab
= currentTab
->GetNextSibling()) {
420 if (currentTab
->GetRect().Width() == 0) continue;
421 if (aFrame
== currentTab
) thisTabIndex
= i
;
422 if (IsSelectedTab(currentTab
)) selectedTabIndex
= i
;
426 if (thisTabIndex
== -1 || selectedTabIndex
== -1) return false;
428 return (thisTabIndex
- selectedTabIndex
== aOffset
);
431 bool nsNativeTheme::IsVerticalProgress(nsIFrame
* aFrame
) {
435 return IsVerticalMeter(aFrame
);
438 bool nsNativeTheme::IsVerticalMeter(nsIFrame
* aFrame
) {
439 MOZ_ASSERT(aFrame
, "You have to pass a non-null aFrame");
440 switch (aFrame
->StyleDisplay()->mOrient
) {
441 case StyleOrient::Horizontal
:
443 case StyleOrient::Vertical
:
445 case StyleOrient::Inline
:
446 return aFrame
->GetWritingMode().IsVertical();
447 case StyleOrient::Block
:
448 return !aFrame
->GetWritingMode().IsVertical();
450 MOZ_ASSERT_UNREACHABLE("unexpected -moz-orient value");
455 bool nsNativeTheme::IsSubmenu(nsIFrame
* aFrame
, bool* aLeftOfParent
) {
456 if (!aFrame
) return false;
458 nsIContent
* parentContent
= aFrame
->GetContent()->GetParent();
459 if (!parentContent
|| !parentContent
->IsXULElement(nsGkAtoms::menu
))
462 nsIFrame
* parent
= aFrame
;
463 while ((parent
= parent
->GetParent())) {
464 if (parent
->GetContent() == parentContent
) {
466 LayoutDeviceIntRect selfBounds
, parentBounds
;
467 selfBounds
= aFrame
->GetNearestWidget()->GetScreenBounds();
468 parentBounds
= parent
->GetNearestWidget()->GetScreenBounds();
469 *aLeftOfParent
= selfBounds
.X() < parentBounds
.X();
478 bool nsNativeTheme::IsRegularMenuItem(nsIFrame
* aFrame
) {
479 nsMenuFrame
* menuFrame
= do_QueryFrame(aFrame
);
480 return !(menuFrame
&&
481 (menuFrame
->IsOnMenuBar() || menuFrame
->IsParentMenuList()));
484 bool nsNativeTheme::QueueAnimatedContentForRefresh(nsIContent
* aContent
,
485 uint32_t aMinimumFrameRate
) {
486 NS_ASSERTION(aContent
, "Null pointer!");
487 NS_ASSERTION(aMinimumFrameRate
, "aMinimumFrameRate must be non-zero!");
488 NS_ASSERTION(aMinimumFrameRate
<= 1000,
489 "aMinimumFrameRate must be less than 1000!");
491 uint32_t timeout
= 1000 / aMinimumFrameRate
;
492 timeout
= std::min(mAnimatedContentTimeout
, timeout
);
494 if (!mAnimatedContentTimer
) {
495 mAnimatedContentTimer
= NS_NewTimer();
496 NS_ENSURE_TRUE(mAnimatedContentTimer
, false);
499 if (mAnimatedContentList
.IsEmpty() || timeout
!= mAnimatedContentTimeout
) {
501 if (!mAnimatedContentList
.IsEmpty()) {
502 rv
= mAnimatedContentTimer
->Cancel();
503 NS_ENSURE_SUCCESS(rv
, false);
506 if (XRE_IsContentProcess() && NS_IsMainThread()) {
507 mAnimatedContentTimer
->SetTarget(
508 aContent
->OwnerDoc()->EventTargetFor(TaskCategory::Other
));
510 rv
= mAnimatedContentTimer
->InitWithCallback(this, timeout
,
511 nsITimer::TYPE_ONE_SHOT
);
512 NS_ENSURE_SUCCESS(rv
, false);
514 mAnimatedContentTimeout
= timeout
;
517 // XXX(Bug 1631371) Check if this should use a fallible operation as it
518 // pretended earlier.
519 mAnimatedContentList
.AppendElement(aContent
);
525 nsNativeTheme::Notify(nsITimer
* aTimer
) {
526 NS_ASSERTION(aTimer
== mAnimatedContentTimer
, "Wrong timer!");
528 // XXX Assumes that calling nsIFrame::Invalidate won't reenter
529 // QueueAnimatedContentForRefresh.
531 uint32_t count
= mAnimatedContentList
.Length();
532 for (uint32_t index
= 0; index
< count
; index
++) {
533 nsIFrame
* frame
= mAnimatedContentList
[index
]->GetPrimaryFrame();
535 frame
->InvalidateFrame();
539 mAnimatedContentList
.Clear();
540 mAnimatedContentTimeout
= UINT32_MAX
;
545 nsNativeTheme::GetName(nsACString
& aName
) {
546 aName
.AssignLiteral("nsNativeTheme");
550 nsIFrame
* nsNativeTheme::GetAdjacentSiblingFrameWithSameAppearance(
551 nsIFrame
* aFrame
, bool aNextSibling
) {
552 if (!aFrame
) return nullptr;
554 // Find the next visible sibling.
555 nsIFrame
* sibling
= aFrame
;
558 aNextSibling
? sibling
->GetNextSibling() : sibling
->GetPrevSibling();
559 } while (sibling
&& sibling
->GetRect().Width() == 0);
561 // Check same appearance and adjacency.
563 sibling
->StyleDisplay()->EffectiveAppearance() !=
564 aFrame
->StyleDisplay()->EffectiveAppearance() ||
565 (sibling
->GetRect().XMost() != aFrame
->GetRect().X() &&
566 aFrame
->GetRect().XMost() != sibling
->GetRect().X()))
571 bool nsNativeTheme::IsRangeHorizontal(nsIFrame
* aFrame
) {
572 nsIFrame
* rangeFrame
= aFrame
;
573 if (!rangeFrame
->IsRangeFrame()) {
574 // If the thumb's frame is passed in, get its range parent:
575 rangeFrame
= aFrame
->GetParent();
577 if (rangeFrame
->IsRangeFrame()) {
578 return static_cast<nsRangeFrame
*>(rangeFrame
)->IsHorizontal();
580 // Not actually a range frame - just use the ratio of the frame's size to
582 return aFrame
->GetSize().width
>= aFrame
->GetSize().height
;
585 static nsIFrame
* GetBodyFrame(nsIFrame
* aCanvasFrame
) {
586 nsIContent
* body
= aCanvasFrame
->PresContext()->Document()->GetBodyElement();
590 return body
->GetPrimaryFrame();
593 bool nsNativeTheme::IsDarkColor(nscolor aColor
) {
594 // Given https://www.w3.org/TR/WCAG20/#contrast-ratiodef, this is the
595 // threshold that tells us whether contrast is better against white or black.
597 // Contrast ratio against black is: (L + 0.05) / 0.05
598 // Contrast ratio against white is: 1.05 / (L + 0.05)
600 // So the intersection is:
602 // (L + 0.05) / 0.05 = 1.05 / (L + 0.05)
604 // And the solution to that equation is:
606 // sqrt(1.05 * 0.05) - 0.05
608 // So we consider a color dark if the contrast is below this threshold, and
609 // it's at least half-opaque.
610 constexpr float kThreshold
= 0.179129;
611 return NS_GET_A(aColor
) > 127 &&
612 RelativeLuminanceUtils::Compute(aColor
) < kThreshold
;
616 bool nsNativeTheme::IsDarkBackground(nsIFrame
* aFrame
) {
617 // Try to find the scrolled frame. Note that for stuff like xul <tree> there
620 nsIFrame
* frame
= aFrame
;
621 nsIScrollableFrame
* scrollFrame
= nullptr;
622 while (!scrollFrame
&& frame
) {
623 scrollFrame
= frame
->GetScrollTargetFrame();
624 frame
= frame
->GetParent();
627 aFrame
= scrollFrame
->GetScrolledFrame();
629 // Leave aFrame untouched.
633 auto backgroundFrame
= nsCSSRendering::FindNonTransparentBackgroundFrame(
634 aFrame
, /* aStopAtThemed = */ false);
635 if (!backgroundFrame
.mFrame
) {
639 nscolor color
= backgroundFrame
.mFrame
->StyleBackground()->BackgroundColor(
640 backgroundFrame
.mFrame
);
642 if (backgroundFrame
.mIsForCanvas
) {
643 // For canvas frames, prefer to look at the body first, because the body
644 // background color is most likely what will be visible as the background
645 // color of the page, even if the html element has a different background
646 // color which prevents that of the body frame to propagate to the viewport.
647 if (nsIFrame
* bodyFrame
= GetBodyFrame(aFrame
)) {
649 bodyFrame
->StyleBackground()->BackgroundColor(bodyFrame
);
650 if (NS_GET_A(bodyColor
)) {
656 return IsDarkColor(color
);
660 bool nsNativeTheme::IsWidgetScrollbarPart(StyleAppearance aAppearance
) {
661 switch (aAppearance
) {
662 case StyleAppearance::ScrollbarVertical
:
663 case StyleAppearance::ScrollbarHorizontal
:
664 case StyleAppearance::ScrollbarbuttonUp
:
665 case StyleAppearance::ScrollbarbuttonDown
:
666 case StyleAppearance::ScrollbarbuttonLeft
:
667 case StyleAppearance::ScrollbarbuttonRight
:
668 case StyleAppearance::ScrollbarthumbVertical
:
669 case StyleAppearance::ScrollbarthumbHorizontal
:
670 case StyleAppearance::ScrollbartrackHorizontal
:
671 case StyleAppearance::ScrollbartrackVertical
:
672 case StyleAppearance::Scrollcorner
: