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-rw-r--r--accessible/base/nsCoreUtils.cpp623
1 files changed, 623 insertions, 0 deletions
diff --git a/accessible/base/nsCoreUtils.cpp b/accessible/base/nsCoreUtils.cpp
new file mode 100644
index 0000000000..8f48a33b09
--- /dev/null
+++ b/accessible/base/nsCoreUtils.cpp
@@ -0,0 +1,623 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsCoreUtils.h"
+
+#include "nsAttrValue.h"
+#include "nsIAccessibleTypes.h"
+
+#include "mozilla/dom/Document.h"
+#include "nsAccUtils.h"
+#include "nsRange.h"
+#include "nsXULElement.h"
+#include "nsIDocShell.h"
+#include "nsIObserverService.h"
+#include "nsPresContext.h"
+#include "nsIScrollableFrame.h"
+#include "nsISelectionController.h"
+#include "nsISimpleEnumerator.h"
+#include "mozilla/dom/TouchEvent.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/EventListenerManager.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/TouchEvents.h"
+#include "nsView.h"
+#include "nsGkAtoms.h"
+
+#include "nsComponentManagerUtils.h"
+
+#include "XULTreeElement.h"
+#include "nsIContentInlines.h"
+#include "nsTreeColumns.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLLabelElement.h"
+#include "mozilla/dom/MouseEventBinding.h"
+#include "mozilla/dom/Selection.h"
+
+using namespace mozilla;
+
+using mozilla::dom::DOMRect;
+using mozilla::dom::Element;
+using mozilla::dom::Selection;
+using mozilla::dom::XULTreeElement;
+
+using mozilla::a11y::nsAccUtils;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsCoreUtils
+////////////////////////////////////////////////////////////////////////////////
+
+bool nsCoreUtils::IsLabelWithControl(nsIContent* aContent) {
+ dom::HTMLLabelElement* label = dom::HTMLLabelElement::FromNode(aContent);
+ if (label && label->GetControl()) return true;
+
+ return false;
+}
+
+bool nsCoreUtils::HasClickListener(nsIContent* aContent) {
+ NS_ENSURE_TRUE(aContent, false);
+ EventListenerManager* listenerManager =
+ aContent->GetExistingListenerManager();
+
+ return listenerManager &&
+ (listenerManager->HasListenersFor(nsGkAtoms::onclick) ||
+ listenerManager->HasListenersFor(nsGkAtoms::onmousedown) ||
+ listenerManager->HasListenersFor(nsGkAtoms::onmouseup));
+}
+
+void nsCoreUtils::DispatchClickEvent(XULTreeElement* aTree, int32_t aRowIndex,
+ nsTreeColumn* aColumn,
+ const nsAString& aPseudoElt) {
+ RefPtr<dom::Element> tcElm = aTree->GetTreeBody();
+ if (!tcElm) return;
+
+ Document* document = tcElm->GetUncomposedDoc();
+ if (!document) return;
+
+ RefPtr<PresShell> presShell = document->GetPresShell();
+ if (!presShell) {
+ return;
+ }
+
+ // Ensure row is visible.
+ aTree->EnsureRowIsVisible(aRowIndex);
+
+ // Calculate x and y coordinates.
+ nsresult rv;
+ nsIntRect rect =
+ aTree->GetCoordsForCellItem(aRowIndex, aColumn, aPseudoElt, rv);
+ if (NS_FAILED(rv)) {
+ return;
+ }
+
+ RefPtr<DOMRect> treeBodyRect = tcElm->GetBoundingClientRect();
+ int32_t tcX = (int32_t)treeBodyRect->X();
+ int32_t tcY = (int32_t)treeBodyRect->Y();
+
+ // Dispatch mouse events.
+ AutoWeakFrame tcFrame = tcElm->GetPrimaryFrame();
+ nsIFrame* rootFrame = presShell->GetRootFrame();
+
+ nsPoint offset;
+ nsCOMPtr<nsIWidget> rootWidget =
+ rootFrame->GetView()->GetNearestWidget(&offset);
+
+ RefPtr<nsPresContext> presContext = presShell->GetPresContext();
+
+ int32_t cnvdX = presContext->CSSPixelsToDevPixels(tcX + int32_t(rect.x) + 1) +
+ presContext->AppUnitsToDevPixels(offset.x);
+ int32_t cnvdY = presContext->CSSPixelsToDevPixels(tcY + int32_t(rect.y) + 1) +
+ presContext->AppUnitsToDevPixels(offset.y);
+
+ // XUL is just desktop, so there is no real reason for senfing touch events.
+ DispatchMouseEvent(eMouseDown, cnvdX, cnvdY, tcElm, tcFrame, presShell,
+ rootWidget);
+
+ DispatchMouseEvent(eMouseUp, cnvdX, cnvdY, tcElm, tcFrame, presShell,
+ rootWidget);
+}
+
+void nsCoreUtils::DispatchMouseEvent(EventMessage aMessage, int32_t aX,
+ int32_t aY, nsIContent* aContent,
+ nsIFrame* aFrame, PresShell* aPresShell,
+ nsIWidget* aRootWidget) {
+ WidgetMouseEvent event(true, aMessage, aRootWidget, WidgetMouseEvent::eReal,
+ WidgetMouseEvent::eNormal);
+
+ event.mRefPoint = LayoutDeviceIntPoint(aX, aY);
+
+ event.mClickCount = 1;
+ event.mButton = MouseButton::ePrimary;
+ event.mInputSource = dom::MouseEvent_Binding::MOZ_SOURCE_UNKNOWN;
+
+ nsEventStatus status = nsEventStatus_eIgnore;
+ aPresShell->HandleEventWithTarget(&event, aFrame, aContent, &status);
+}
+
+void nsCoreUtils::DispatchTouchEvent(EventMessage aMessage, int32_t aX,
+ int32_t aY, nsIContent* aContent,
+ nsIFrame* aFrame, PresShell* aPresShell,
+ nsIWidget* aRootWidget) {
+ nsIDocShell* docShell = nullptr;
+ if (aPresShell->GetDocument()) {
+ docShell = aPresShell->GetDocument()->GetDocShell();
+ }
+ if (!dom::TouchEvent::PrefEnabled(docShell)) {
+ return;
+ }
+
+ WidgetTouchEvent event(true, aMessage, aRootWidget);
+
+ // XXX: Touch has an identifier of -1 to hint that it is synthesized.
+ RefPtr<dom::Touch> t = new dom::Touch(-1, LayoutDeviceIntPoint(aX, aY),
+ LayoutDeviceIntPoint(1, 1), 0.0f, 1.0f);
+ t->SetTouchTarget(aContent);
+ event.mTouches.AppendElement(t);
+ nsEventStatus status = nsEventStatus_eIgnore;
+ aPresShell->HandleEventWithTarget(&event, aFrame, aContent, &status);
+}
+
+uint32_t nsCoreUtils::GetAccessKeyFor(nsIContent* aContent) {
+ // Accesskeys are registered by @accesskey attribute only. At first check
+ // whether it is presented on the given element to avoid the slow
+ // EventStateManager::GetRegisteredAccessKey() method.
+ if (!aContent->IsElement() || !aContent->AsElement()->HasAttr(
+ kNameSpaceID_None, nsGkAtoms::accesskey)) {
+ return 0;
+ }
+
+ nsPresContext* presContext = aContent->OwnerDoc()->GetPresContext();
+ if (!presContext) return 0;
+
+ EventStateManager* esm = presContext->EventStateManager();
+ if (!esm) return 0;
+
+ return esm->GetRegisteredAccessKey(aContent->AsElement());
+}
+
+nsIContent* nsCoreUtils::GetDOMElementFor(nsIContent* aContent) {
+ if (aContent->IsElement()) return aContent;
+
+ if (aContent->IsText()) return aContent->GetFlattenedTreeParent();
+
+ return nullptr;
+}
+
+nsINode* nsCoreUtils::GetDOMNodeFromDOMPoint(nsINode* aNode, uint32_t aOffset) {
+ if (aNode && aNode->IsElement()) {
+ uint32_t childCount = aNode->GetChildCount();
+ NS_ASSERTION(aOffset <= childCount, "Wrong offset of the DOM point!");
+
+ // The offset can be after last child of container node that means DOM point
+ // is placed immediately after the last child. In this case use the DOM node
+ // from the given DOM point is used as result node.
+ if (aOffset != childCount) return aNode->GetChildAt_Deprecated(aOffset);
+ }
+
+ return aNode;
+}
+
+bool nsCoreUtils::IsAncestorOf(nsINode* aPossibleAncestorNode,
+ nsINode* aPossibleDescendantNode,
+ nsINode* aRootNode) {
+ NS_ENSURE_TRUE(aPossibleAncestorNode && aPossibleDescendantNode, false);
+
+ nsINode* parentNode = aPossibleDescendantNode;
+ while ((parentNode = parentNode->GetParentNode()) &&
+ parentNode != aRootNode) {
+ if (parentNode == aPossibleAncestorNode) return true;
+ }
+
+ return false;
+}
+
+nsresult nsCoreUtils::ScrollSubstringTo(nsIFrame* aFrame, nsRange* aRange,
+ uint32_t aScrollType) {
+ ScrollAxis vertical, horizontal;
+ ConvertScrollTypeToPercents(aScrollType, &vertical, &horizontal);
+
+ return ScrollSubstringTo(aFrame, aRange, vertical, horizontal);
+}
+
+nsresult nsCoreUtils::ScrollSubstringTo(nsIFrame* aFrame, nsRange* aRange,
+ ScrollAxis aVertical,
+ ScrollAxis aHorizontal) {
+ if (!aFrame || !aRange) {
+ return NS_ERROR_FAILURE;
+ }
+
+ nsPresContext* presContext = aFrame->PresContext();
+
+ nsCOMPtr<nsISelectionController> selCon;
+ aFrame->GetSelectionController(presContext, getter_AddRefs(selCon));
+ NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
+
+ RefPtr<dom::Selection> selection =
+ selCon->GetSelection(nsISelectionController::SELECTION_ACCESSIBILITY);
+
+ selection->RemoveAllRanges(IgnoreErrors());
+ selection->AddRangeAndSelectFramesAndNotifyListeners(*aRange, IgnoreErrors());
+
+ selection->ScrollIntoView(nsISelectionController::SELECTION_ANCHOR_REGION,
+ aVertical, aHorizontal,
+ Selection::SCROLL_SYNCHRONOUS);
+
+ selection->CollapseToStart(IgnoreErrors());
+
+ return NS_OK;
+}
+
+void nsCoreUtils::ScrollFrameToPoint(nsIFrame* aScrollableFrame,
+ nsIFrame* aFrame,
+ const LayoutDeviceIntPoint& aPoint) {
+ nsIScrollableFrame* scrollableFrame = do_QueryFrame(aScrollableFrame);
+ if (!scrollableFrame) return;
+
+ nsPoint point = LayoutDeviceIntPoint::ToAppUnits(
+ aPoint, aFrame->PresContext()->AppUnitsPerDevPixel());
+ nsRect frameRect = aFrame->GetScreenRectInAppUnits();
+ nsPoint deltaPoint = point - frameRect.TopLeft();
+
+ nsPoint scrollPoint = scrollableFrame->GetScrollPosition();
+ scrollPoint -= deltaPoint;
+
+ scrollableFrame->ScrollTo(scrollPoint, ScrollMode::Instant);
+}
+
+void nsCoreUtils::ConvertScrollTypeToPercents(uint32_t aScrollType,
+ ScrollAxis* aVertical,
+ ScrollAxis* aHorizontal) {
+ WhereToScroll whereY, whereX;
+ WhenToScroll whenY, whenX;
+ switch (aScrollType) {
+ case nsIAccessibleScrollType::SCROLL_TYPE_TOP_LEFT:
+ whereY = WhereToScroll::Start;
+ whenY = WhenToScroll::Always;
+ whereX = WhereToScroll::Start;
+ whenX = WhenToScroll::Always;
+ break;
+ case nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_RIGHT:
+ whereY = WhereToScroll::End;
+ whenY = WhenToScroll::Always;
+ whereX = WhereToScroll::End;
+ whenX = WhenToScroll::Always;
+ break;
+ case nsIAccessibleScrollType::SCROLL_TYPE_TOP_EDGE:
+ whereY = WhereToScroll::Start;
+ whenY = WhenToScroll::Always;
+ whereX = WhereToScroll::Nearest;
+ whenX = WhenToScroll::IfNotFullyVisible;
+ break;
+ case nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_EDGE:
+ whereY = WhereToScroll::End;
+ whenY = WhenToScroll::Always;
+ whereX = WhereToScroll::Nearest;
+ whenX = WhenToScroll::IfNotFullyVisible;
+ break;
+ case nsIAccessibleScrollType::SCROLL_TYPE_LEFT_EDGE:
+ whereY = WhereToScroll::Nearest;
+ whenY = WhenToScroll::IfNotFullyVisible;
+ whereX = WhereToScroll::Start;
+ whenX = WhenToScroll::Always;
+ break;
+ case nsIAccessibleScrollType::SCROLL_TYPE_RIGHT_EDGE:
+ whereY = WhereToScroll::Nearest;
+ whenY = WhenToScroll::IfNotFullyVisible;
+ whereX = WhereToScroll::End;
+ whenX = WhenToScroll::Always;
+ break;
+ default:
+ whereY = WhereToScroll::Nearest;
+ whenY = WhenToScroll::IfNotFullyVisible;
+ whereX = WhereToScroll::Nearest;
+ whenX = WhenToScroll::IfNotFullyVisible;
+ }
+ *aVertical = ScrollAxis(whereY, whenY);
+ *aHorizontal = ScrollAxis(whereX, whenX);
+}
+
+already_AddRefed<nsIDocShell> nsCoreUtils::GetDocShellFor(nsINode* aNode) {
+ if (!aNode) return nullptr;
+
+ nsCOMPtr<nsIDocShell> docShell = aNode->OwnerDoc()->GetDocShell();
+ return docShell.forget();
+}
+
+bool nsCoreUtils::IsRootDocument(Document* aDocument) {
+ nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = aDocument->GetDocShell();
+ NS_ASSERTION(docShellTreeItem, "No document shell for document!");
+
+ nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
+ docShellTreeItem->GetInProcessParent(getter_AddRefs(parentTreeItem));
+
+ return !parentTreeItem;
+}
+
+bool nsCoreUtils::IsTopLevelContentDocInProcess(Document* aDocumentNode) {
+ mozilla::dom::BrowsingContext* bc = aDocumentNode->GetBrowsingContext();
+ return bc->IsContent() && (
+ // Tab document.
+ bc->IsTop() ||
+ // Out-of-process iframe.
+ !bc->GetParent()->IsInProcess());
+}
+
+bool nsCoreUtils::IsErrorPage(Document* aDocument) {
+ nsIURI* uri = aDocument->GetDocumentURI();
+ if (!uri->SchemeIs("about")) {
+ return false;
+ }
+
+ nsAutoCString path;
+ uri->GetPathQueryRef(path);
+
+ constexpr auto neterror = "neterror"_ns;
+ constexpr auto certerror = "certerror"_ns;
+
+ return StringBeginsWith(path, neterror) || StringBeginsWith(path, certerror);
+}
+
+PresShell* nsCoreUtils::GetPresShellFor(nsINode* aNode) {
+ return aNode->OwnerDoc()->GetPresShell();
+}
+
+bool nsCoreUtils::GetID(nsIContent* aContent, nsAString& aID) {
+ return aContent->IsElement() &&
+ aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::id, aID);
+}
+
+bool nsCoreUtils::GetUIntAttr(nsIContent* aContent, nsAtom* aAttr,
+ int32_t* aUInt) {
+ if (!aContent->IsElement()) {
+ return false;
+ }
+ return GetUIntAttrValue(nsAccUtils::GetARIAAttr(aContent->AsElement(), aAttr),
+ aUInt);
+}
+
+bool nsCoreUtils::GetUIntAttrValue(const nsAttrValue* aVal, int32_t* aUInt) {
+ if (!aVal) {
+ return false;
+ }
+ nsAutoString value;
+ aVal->ToString(value);
+ if (!value.IsEmpty()) {
+ nsresult error = NS_OK;
+ int32_t integer = value.ToInteger(&error);
+ if (NS_SUCCEEDED(error) && integer > 0) {
+ *aUInt = integer;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+void nsCoreUtils::GetLanguageFor(nsIContent* aContent, nsIContent* aRootContent,
+ nsAString& aLanguage) {
+ aLanguage.Truncate();
+
+ nsIContent* walkUp = aContent;
+ while (walkUp && walkUp != aRootContent &&
+ (!walkUp->IsElement() ||
+ !walkUp->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::lang,
+ aLanguage))) {
+ walkUp = walkUp->GetParent();
+ }
+}
+
+XULTreeElement* nsCoreUtils::GetTree(nsIContent* aContent) {
+ // Find DOMNode's parents recursively until reach the <tree> tag
+ nsIContent* currentContent = aContent;
+ while (currentContent) {
+ if (currentContent->NodeInfo()->Equals(nsGkAtoms::tree, kNameSpaceID_XUL)) {
+ return XULTreeElement::FromNode(currentContent);
+ }
+ currentContent = currentContent->GetFlattenedTreeParent();
+ }
+
+ return nullptr;
+}
+
+already_AddRefed<nsTreeColumn> nsCoreUtils::GetFirstSensibleColumn(
+ XULTreeElement* aTree, FlushType aFlushType) {
+ if (!aTree) {
+ return nullptr;
+ }
+
+ RefPtr<nsTreeColumns> cols = aTree->GetColumns(aFlushType);
+ if (!cols) {
+ return nullptr;
+ }
+
+ RefPtr<nsTreeColumn> column = cols->GetFirstColumn();
+ if (column && IsColumnHidden(column)) return GetNextSensibleColumn(column);
+
+ return column.forget();
+}
+
+uint32_t nsCoreUtils::GetSensibleColumnCount(XULTreeElement* aTree) {
+ uint32_t count = 0;
+ if (!aTree) {
+ return count;
+ }
+
+ RefPtr<nsTreeColumns> cols = aTree->GetColumns();
+ if (!cols) {
+ return count;
+ }
+
+ nsTreeColumn* column = cols->GetFirstColumn();
+
+ while (column) {
+ if (!IsColumnHidden(column)) count++;
+
+ column = column->GetNext();
+ }
+
+ return count;
+}
+
+already_AddRefed<nsTreeColumn> nsCoreUtils::GetSensibleColumnAt(
+ XULTreeElement* aTree, uint32_t aIndex) {
+ if (!aTree) {
+ return nullptr;
+ }
+
+ uint32_t idx = aIndex;
+
+ nsCOMPtr<nsTreeColumn> column = GetFirstSensibleColumn(aTree);
+ while (column) {
+ if (idx == 0) return column.forget();
+
+ idx--;
+ column = GetNextSensibleColumn(column);
+ }
+
+ return nullptr;
+}
+
+already_AddRefed<nsTreeColumn> nsCoreUtils::GetNextSensibleColumn(
+ nsTreeColumn* aColumn) {
+ if (!aColumn) {
+ return nullptr;
+ }
+
+ RefPtr<nsTreeColumn> nextColumn = aColumn->GetNext();
+
+ while (nextColumn && IsColumnHidden(nextColumn)) {
+ nextColumn = nextColumn->GetNext();
+ }
+
+ return nextColumn.forget();
+}
+
+already_AddRefed<nsTreeColumn> nsCoreUtils::GetPreviousSensibleColumn(
+ nsTreeColumn* aColumn) {
+ if (!aColumn) {
+ return nullptr;
+ }
+
+ RefPtr<nsTreeColumn> prevColumn = aColumn->GetPrevious();
+
+ while (prevColumn && IsColumnHidden(prevColumn)) {
+ prevColumn = prevColumn->GetPrevious();
+ }
+
+ return prevColumn.forget();
+}
+
+bool nsCoreUtils::IsColumnHidden(nsTreeColumn* aColumn) {
+ if (!aColumn) {
+ return false;
+ }
+
+ Element* element = aColumn->Element();
+ return element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
+ nsGkAtoms::_true, eCaseMatters);
+}
+
+void nsCoreUtils::ScrollTo(PresShell* aPresShell, nsIContent* aContent,
+ uint32_t aScrollType) {
+ ScrollAxis vertical, horizontal;
+ ConvertScrollTypeToPercents(aScrollType, &vertical, &horizontal);
+ aPresShell->ScrollContentIntoView(aContent, vertical, horizontal,
+ ScrollFlags::ScrollOverflowHidden);
+}
+
+bool nsCoreUtils::IsHTMLTableHeader(nsIContent* aContent) {
+ return aContent->NodeInfo()->Equals(nsGkAtoms::th) ||
+ (aContent->IsElement() &&
+ aContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::scope));
+}
+
+bool nsCoreUtils::IsWhitespaceString(const nsAString& aString) {
+ nsAString::const_char_iterator iterBegin, iterEnd;
+
+ aString.BeginReading(iterBegin);
+ aString.EndReading(iterEnd);
+
+ while (iterBegin != iterEnd && IsWhitespace(*iterBegin)) ++iterBegin;
+
+ return iterBegin == iterEnd;
+}
+
+bool nsCoreUtils::AccEventObserversExist() {
+ nsCOMPtr<nsIObserverService> obsService = services::GetObserverService();
+ NS_ENSURE_TRUE(obsService, false);
+
+ nsCOMPtr<nsISimpleEnumerator> observers;
+ obsService->EnumerateObservers(NS_ACCESSIBLE_EVENT_TOPIC,
+ getter_AddRefs(observers));
+ NS_ENSURE_TRUE(observers, false);
+
+ bool hasObservers = false;
+ observers->HasMoreElements(&hasObservers);
+
+ return hasObservers;
+}
+
+void nsCoreUtils::DispatchAccEvent(RefPtr<nsIAccessibleEvent> event) {
+ nsCOMPtr<nsIObserverService> obsService = services::GetObserverService();
+ NS_ENSURE_TRUE_VOID(obsService);
+
+ obsService->NotifyObservers(event, NS_ACCESSIBLE_EVENT_TOPIC, nullptr);
+}
+
+bool nsCoreUtils::IsDisplayContents(nsIContent* aContent) {
+ auto* element = Element::FromNodeOrNull(aContent);
+ return element && element->IsDisplayContents();
+}
+
+bool nsCoreUtils::CanCreateAccessibleWithoutFrame(nsIContent* aContent) {
+ auto* element = Element::FromNodeOrNull(aContent);
+ if (!element) {
+ return false;
+ }
+ if (!element->HasServoData() || Servo_Element_IsDisplayNone(element)) {
+ // Out of the flat tree or in a display: none subtree.
+ return false;
+ }
+
+ // If we aren't display: contents or option/optgroup we can't create an
+ // accessible without frame. Our select combobox code relies on the latter.
+ if (!element->IsDisplayContents() &&
+ !element->IsAnyOfHTMLElements(nsGkAtoms::option, nsGkAtoms::optgroup)) {
+ return false;
+ }
+
+ // Even if we're display: contents or optgroups, we might not be able to
+ // create an accessible if we're in a content-visibility: hidden subtree.
+ //
+ // To check that, find the closest ancestor element with a frame.
+ for (nsINode* ancestor = element->GetFlattenedTreeParentNode();
+ ancestor && ancestor->IsContent();
+ ancestor = ancestor->GetFlattenedTreeParentNode()) {
+ if (nsIFrame* f = ancestor->AsContent()->GetPrimaryFrame()) {
+ if (f->HidesContent(nsIFrame::IncludeContentVisibility::Hidden) ||
+ f->IsHiddenByContentVisibilityOnAnyAncestor(
+ nsIFrame::IncludeContentVisibility::Hidden)) {
+ return false;
+ }
+ break;
+ }
+ }
+
+ return true;
+}
+
+bool nsCoreUtils::IsDocumentVisibleConsideringInProcessAncestors(
+ const Document* aDocument) {
+ const Document* parent = aDocument;
+ do {
+ if (!parent->IsVisible()) {
+ return false;
+ }
+ } while ((parent = parent->GetInProcessParentDocument()));
+ return true;
+}