diff options
Diffstat (limited to 'accessible/mac/DocAccessibleWrap.mm')
-rw-r--r-- | accessible/mac/DocAccessibleWrap.mm | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/accessible/mac/DocAccessibleWrap.mm b/accessible/mac/DocAccessibleWrap.mm new file mode 100644 index 0000000000..d83c8d5056 --- /dev/null +++ b/accessible/mac/DocAccessibleWrap.mm @@ -0,0 +1,103 @@ +/* clang-format off */ +/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* clang-format on */ +/* 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 "DocAccessibleWrap.h" +#include "DocAccessible-inl.h" + +#import "mozAccessible.h" +#import "MOXTextMarkerDelegate.h" + +using namespace mozilla; +using namespace mozilla::a11y; + +DocAccessibleWrap::DocAccessibleWrap(dom::Document* aDocument, + PresShell* aPresShell) + : DocAccessible(aDocument, aPresShell) {} + +void DocAccessibleWrap::Shutdown() { + [MOXTextMarkerDelegate destroyForDoc:this]; + DocAccessible::Shutdown(); +} + +DocAccessibleWrap::~DocAccessibleWrap() {} + +void DocAccessibleWrap::AttributeChanged(dom::Element* aElement, + int32_t aNameSpaceID, + nsAtom* aAttribute, int32_t aModType, + const nsAttrValue* aOldValue) { + DocAccessible::AttributeChanged(aElement, aNameSpaceID, aAttribute, aModType, + aOldValue); + if (aAttribute == nsGkAtoms::aria_live) { + LocalAccessible* accessible = + mContent != aElement ? GetAccessible(aElement) : this; + if (!accessible) { + return; + } + + static const dom::Element::AttrValuesArray sLiveRegionValues[] = { + nsGkAtoms::OFF, nsGkAtoms::polite, nsGkAtoms::assertive, nullptr}; + int32_t attrValue = nsAccUtils::FindARIAAttrValueIn( + aElement, nsGkAtoms::aria_live, sLiveRegionValues, eIgnoreCase); + if (attrValue > 0) { + if (!aOldValue || aOldValue->IsEmptyString() || + aOldValue->Equals(nsGkAtoms::OFF, eIgnoreCase)) { + // This element just got an active aria-live attribute value + FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED, + accessible); + } + } else { + if (aOldValue && (aOldValue->Equals(nsGkAtoms::polite, eIgnoreCase) || + aOldValue->Equals(nsGkAtoms::assertive, eIgnoreCase))) { + // This element lost an active live region + FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED, + accessible); + } else if (attrValue == 0) { + // aria-live="off", check if its a role-based live region that + // needs to be removed. + if (const nsRoleMapEntry* roleMap = accessible->ARIARoleMap()) { + // aria role defines it as a live region. It's live! + if (roleMap->liveAttRule == ePoliteLiveAttr || + roleMap->liveAttRule == eAssertiveLiveAttr) { + FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED, + accessible); + } + } else if (nsStaticAtom* value = GetAccService()->MarkupAttribute( + aElement, nsGkAtoms::aria_live)) { + // HTML element defines it as a live region. It's live! + if (value == nsGkAtoms::polite || value == nsGkAtoms::assertive) { + FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED, + accessible); + } + } + } + } + } +} + +void DocAccessibleWrap::QueueNewLiveRegion(LocalAccessible* aAccessible) { + if (!aAccessible) { + return; + } + + mNewLiveRegions.Insert(aAccessible->UniqueID()); +} + +void DocAccessibleWrap::ProcessNewLiveRegions() { + for (const auto& uniqueID : mNewLiveRegions) { + if (LocalAccessible* liveRegion = + GetAccessibleByUniqueID(const_cast<void*>(uniqueID))) { + FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED, liveRegion); + } + } + + mNewLiveRegions.Clear(); +} + +void DocAccessibleWrap::DoInitialUpdate() { + DocAccessible::DoInitialUpdate(); + ProcessNewLiveRegions(); +} |