зеркало из https://github.com/mozilla/gecko-dev.git
1687 строки
56 KiB
C++
1687 строки
56 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsAccessibilityService.h"
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// NOTE: alphabetically ordered
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#include "ApplicationAccessibleWrap.h"
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#include "ARIAGridAccessibleWrap.h"
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#include "ARIAMap.h"
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#include "DocAccessible-inl.h"
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#include "FocusManager.h"
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#include "HTMLCanvasAccessible.h"
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#include "HTMLElementAccessibles.h"
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#include "HTMLImageMapAccessible.h"
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#include "HTMLLinkAccessible.h"
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#include "HTMLListAccessible.h"
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#include "HTMLSelectAccessible.h"
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#include "HTMLTableAccessibleWrap.h"
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#include "HyperTextAccessibleWrap.h"
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#include "RootAccessible.h"
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#include "StyleInfo.h"
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#include "nsAccUtils.h"
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#include "nsArrayUtils.h"
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#include "nsAttrName.h"
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#include "nsDOMTokenList.h"
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#include "nsEventShell.h"
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#include "nsIURI.h"
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#include "nsTextFormatter.h"
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#include "OuterDocAccessible.h"
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#include "Role.h"
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#ifdef MOZ_ACCESSIBILITY_ATK
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# include "RootAccessibleWrap.h"
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#endif
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#include "States.h"
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#include "Statistics.h"
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#include "TextLeafAccessibleWrap.h"
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#include "TreeWalker.h"
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#include "xpcAccessibleApplication.h"
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#include "xpcAccessibleDocument.h"
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#ifdef MOZ_ACCESSIBILITY_ATK
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# include "AtkSocketAccessible.h"
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#endif
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#ifdef XP_WIN
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# include "mozilla/a11y/Compatibility.h"
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# include "mozilla/dom/ContentChild.h"
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# include "HTMLWin32ObjectAccessible.h"
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# include "mozilla/StaticPtr.h"
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#endif
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#ifdef A11Y_LOG
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# include "Logging.h"
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#endif
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#include "nsExceptionHandler.h"
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#include "nsImageFrame.h"
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#include "nsINamed.h"
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#include "nsIObserverService.h"
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#include "nsLayoutUtils.h"
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#include "nsPluginFrame.h"
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#include "SVGGeometryFrame.h"
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#include "nsTreeBodyFrame.h"
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#include "nsTreeColumns.h"
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#include "nsTreeUtils.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsXBLBinding.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/dom/DOMStringList.h"
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#include "mozilla/dom/EventTarget.h"
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#include "mozilla/dom/HTMLTableElement.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/Services.h"
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#include "nsDeckFrame.h"
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#ifdef MOZ_XUL
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# include "XULAlertAccessible.h"
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# include "XULComboboxAccessible.h"
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# include "XULElementAccessibles.h"
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# include "XULFormControlAccessible.h"
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# include "XULListboxAccessibleWrap.h"
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# include "XULMenuAccessibleWrap.h"
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# include "XULTabAccessible.h"
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# include "XULTreeGridAccessibleWrap.h"
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#endif
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#if defined(XP_WIN) || defined(MOZ_ACCESSIBILITY_ATK)
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# include "nsNPAPIPluginInstance.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::a11y;
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using namespace mozilla::dom;
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/**
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* Accessibility service force enable/disable preference.
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* Supported values:
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* Accessibility is force enabled (accessibility should always be enabled): -1
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* Accessibility is enabled (will be started upon a request, default value): 0
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* Accessibility is force disabled (never enable accessibility): 1
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*/
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#define PREF_ACCESSIBILITY_FORCE_DISABLED "accessibility.force_disabled"
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////////////////////////////////////////////////////////////////////////////////
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// Statics
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////////////////////////////////////////////////////////////////////////////////
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/**
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* Return true if the element must be accessible.
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*/
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static bool MustBeAccessible(nsIContent* aContent, DocAccessible* aDocument) {
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if (aContent->GetPrimaryFrame()->IsFocusable()) return true;
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if (aContent->IsElement()) {
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uint32_t attrCount = aContent->AsElement()->GetAttrCount();
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for (uint32_t attrIdx = 0; attrIdx < attrCount; attrIdx++) {
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const nsAttrName* attr = aContent->AsElement()->GetAttrNameAt(attrIdx);
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if (attr->NamespaceEquals(kNameSpaceID_None)) {
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nsAtom* attrAtom = attr->Atom();
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if (attrAtom == nsGkAtoms::title && aContent->IsHTMLElement()) {
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// If the author provided a title on an element that would not
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// be accessible normally, assume an intent and make it accessible.
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return true;
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}
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nsDependentAtomString attrStr(attrAtom);
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if (!StringBeginsWith(attrStr, NS_LITERAL_STRING("aria-")))
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continue; // not ARIA
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// A global state or a property and in case of token defined.
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uint8_t attrFlags = aria::AttrCharacteristicsFor(attrAtom);
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if ((attrFlags & ATTR_GLOBAL) &&
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(!(attrFlags & ATTR_VALTOKEN) ||
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nsAccUtils::HasDefinedARIAToken(aContent, attrAtom))) {
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return true;
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}
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}
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}
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// If the given ID is referred by relation attribute then create an
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// accessible for it.
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nsAutoString id;
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if (nsCoreUtils::GetID(aContent, id) && !id.IsEmpty()) {
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return aDocument->IsDependentID(aContent->AsElement(), id);
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}
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}
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return false;
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}
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/**
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* Used by XULMap.h to map both menupopup and popup elements
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*/
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#ifdef MOZ_XUL
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Accessible* CreateMenupopupAccessible(Element* aElement, Accessible* aContext) {
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# ifdef MOZ_ACCESSIBILITY_ATK
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// ATK considers this node to be redundant when within menubars, and it makes
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// menu navigation with assistive technologies more difficult
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// XXX In the future we will should this for consistency across the
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// nsIAccessible implementations on each platform for a consistent scripting
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// environment, but then strip out redundant accessibles in the AccessibleWrap
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// class for each platform.
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nsIContent* parent = aElement->GetParent();
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if (parent && parent->IsXULElement(nsGkAtoms::menu)) return nullptr;
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# endif
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return new XULMenupopupAccessible(aElement, aContext->Document());
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}
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#endif
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////////////////////////////////////////////////////////////////////////////////
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// Accessible constructors
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static Accessible* New_HyperText(Element* aElement, Accessible* aContext) {
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return new HyperTextAccessibleWrap(aElement, aContext->Document());
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}
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template <typename AccClass>
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static Accessible* New_HTMLDtOrDd(Element* aElement, Accessible* aContext) {
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nsIContent* parent = aContext->GetContent();
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if (parent->IsHTMLElement(nsGkAtoms::div)) {
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// It is conforming in HTML to use a div to group dt/dd elements.
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parent = parent->GetParent();
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}
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if (parent && parent->IsHTMLElement(nsGkAtoms::dl)) {
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return new AccClass(aElement, aContext->Document());
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}
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return nullptr;
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}
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/**
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* Cached value of the PREF_ACCESSIBILITY_FORCE_DISABLED preference.
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*/
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static int32_t sPlatformDisabledState = 0;
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////////////////////////////////////////////////////////////////////////////////
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// Markup maps array.
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#define Attr(name, value) \
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{ nsGkAtoms::name, nsGkAtoms::value }
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#define AttrFromDOM(name, DOMAttrName) \
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{ nsGkAtoms::name, nullptr, nsGkAtoms::DOMAttrName }
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#define AttrFromDOMIf(name, DOMAttrName, DOMAttrValue) \
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{ nsGkAtoms::name, nullptr, nsGkAtoms::DOMAttrName, nsGkAtoms::DOMAttrValue }
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#define MARKUPMAP(atom, new_func, r, ...) \
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{nsGkAtoms::atom, new_func, static_cast<a11y::role>(r), {__VA_ARGS__}},
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static const HTMLMarkupMapInfo sHTMLMarkupMapList[] = {
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#include "MarkupMap.h"
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};
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#undef MARKUPMAP
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#ifdef MOZ_XUL
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# define XULMAP(atom, ...) {nsGkAtoms::atom, __VA_ARGS__},
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# define XULMAP_TYPE(atom, new_type) \
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XULMAP(atom, [](Element* aElement, Accessible* aContext) -> Accessible* { \
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return new new_type(aElement, aContext->Document()); \
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})
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static const XULMarkupMapInfo sXULMarkupMapList[] = {
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# include "XULMap.h"
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};
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# undef XULMAP_TYPE
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# undef XULMAP
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#endif
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#undef Attr
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#undef AttrFromDOM
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#undef AttrFromDOMIf
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////////////////////////////////////////////////////////////////////////////////
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// nsAccessibilityService
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////////////////////////////////////////////////////////////////////////////////
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nsAccessibilityService* nsAccessibilityService::gAccessibilityService = nullptr;
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ApplicationAccessible* nsAccessibilityService::gApplicationAccessible = nullptr;
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xpcAccessibleApplication* nsAccessibilityService::gXPCApplicationAccessible =
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nullptr;
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uint32_t nsAccessibilityService::gConsumers = 0;
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nsAccessibilityService::nsAccessibilityService()
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: DocManager(),
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FocusManager(),
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mHTMLMarkupMap(ArrayLength(sHTMLMarkupMapList))
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#ifdef MOZ_XUL
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,
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mXULMarkupMap(ArrayLength(sXULMarkupMapList))
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#endif
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{
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}
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nsAccessibilityService::~nsAccessibilityService() {
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NS_ASSERTION(IsShutdown(), "Accessibility wasn't shutdown!");
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gAccessibilityService = nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsIListenerChangeListener
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NS_IMETHODIMP
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nsAccessibilityService::ListenersChanged(nsIArray* aEventChanges) {
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uint32_t targetCount;
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nsresult rv = aEventChanges->GetLength(&targetCount);
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NS_ENSURE_SUCCESS(rv, rv);
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for (uint32_t i = 0; i < targetCount; i++) {
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nsCOMPtr<nsIEventListenerChange> change =
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do_QueryElementAt(aEventChanges, i);
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RefPtr<EventTarget> target;
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change->GetTarget(getter_AddRefs(target));
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nsCOMPtr<nsIContent> node(do_QueryInterface(target));
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if (!node || !node->IsHTMLElement()) {
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continue;
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}
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uint32_t changeCount;
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change->GetCountOfEventListenerChangesAffectingAccessibility(&changeCount);
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NS_ENSURE_SUCCESS(rv, rv);
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for (uint32_t i = 0; i < changeCount; i++) {
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Document* ownerDoc = node->OwnerDoc();
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DocAccessible* document = GetExistingDocAccessible(ownerDoc);
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// Create an accessible for a inaccessible element having click event
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// handler.
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if (document && !document->HasAccessible(node) &&
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nsCoreUtils::HasClickListener(node)) {
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document->ContentInserted(node, node->GetNextSibling());
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break;
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}
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}
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}
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsISupports
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NS_IMPL_ISUPPORTS_INHERITED(nsAccessibilityService, DocManager, nsIObserver,
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nsIListenerChangeListener,
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nsISelectionListener) // from SelectionManager
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////////////////////////////////////////////////////////////////////////////////
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// nsIObserver
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NS_IMETHODIMP
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nsAccessibilityService::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) {
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if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
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Shutdown();
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}
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return NS_OK;
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}
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void nsAccessibilityService::NotifyOfAnchorJumpTo(nsIContent* aTargetNode) {
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Document* documentNode = aTargetNode->GetUncomposedDoc();
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if (documentNode) {
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DocAccessible* document = GetDocAccessible(documentNode);
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if (document) document->SetAnchorJump(aTargetNode);
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}
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}
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void nsAccessibilityService::FireAccessibleEvent(uint32_t aEvent,
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Accessible* aTarget) {
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nsEventShell::FireEvent(aEvent, aTarget);
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}
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Accessible* nsAccessibilityService::GetRootDocumentAccessible(
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PresShell* aPresShell, bool aCanCreate) {
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PresShell* presShell = aPresShell;
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Document* documentNode = aPresShell->GetDocument();
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if (documentNode) {
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nsCOMPtr<nsIDocShellTreeItem> treeItem(documentNode->GetDocShell());
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if (treeItem) {
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nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
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treeItem->GetRootTreeItem(getter_AddRefs(rootTreeItem));
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if (treeItem != rootTreeItem) {
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nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(rootTreeItem));
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presShell = docShell->GetPresShell();
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}
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return aCanCreate ? GetDocAccessible(presShell)
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: presShell->GetDocAccessible();
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}
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}
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return nullptr;
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}
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#ifdef XP_WIN
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static StaticAutoPtr<nsTArray<nsCOMPtr<nsIContent> > > sPendingPlugins;
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static StaticAutoPtr<nsTArray<nsCOMPtr<nsITimer> > > sPluginTimers;
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class PluginTimerCallBack final : public nsITimerCallback, public nsINamed {
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~PluginTimerCallBack() {}
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public:
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explicit PluginTimerCallBack(nsIContent* aContent) : mContent(aContent) {}
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NS_DECL_ISUPPORTS
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NS_IMETHOD Notify(nsITimer* aTimer) final {
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if (!mContent->IsInUncomposedDoc()) return NS_OK;
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PresShell* presShell = mContent->OwnerDoc()->GetPresShell();
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if (presShell) {
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DocAccessible* doc = presShell->GetDocAccessible();
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if (doc) {
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// Make sure that if we created an accessible for the plugin that wasn't
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// a plugin accessible we remove it before creating the right
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// accessible.
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doc->RecreateAccessible(mContent);
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sPluginTimers->RemoveElement(aTimer);
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return NS_OK;
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}
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}
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// We couldn't get a doc accessible so presumably the document went away.
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// In this case don't leak our ref to the content or timer.
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sPendingPlugins->RemoveElement(mContent);
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sPluginTimers->RemoveElement(aTimer);
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return NS_OK;
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}
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NS_IMETHOD GetName(nsACString& aName) final {
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aName.AssignLiteral("PluginTimerCallBack");
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return NS_OK;
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}
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private:
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nsCOMPtr<nsIContent> mContent;
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};
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NS_IMPL_ISUPPORTS(PluginTimerCallBack, nsITimerCallback, nsINamed)
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#endif
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already_AddRefed<Accessible> nsAccessibilityService::CreatePluginAccessible(
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nsPluginFrame* aFrame, nsIContent* aContent, Accessible* aContext) {
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// nsPluginFrame means a plugin, so we need to use the accessibility support
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// of the plugin.
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if (aFrame->GetRect().IsEmpty()) return nullptr;
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#if defined(XP_WIN) || defined(MOZ_ACCESSIBILITY_ATK)
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RefPtr<nsNPAPIPluginInstance> pluginInstance = aFrame->GetPluginInstance();
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if (pluginInstance) {
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# ifdef XP_WIN
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if (!sPendingPlugins->Contains(aContent) &&
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(Preferences::GetBool("accessibility.delay_plugins") ||
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Compatibility::IsJAWS() || Compatibility::IsWE())) {
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RefPtr<PluginTimerCallBack> cb = new PluginTimerCallBack(aContent);
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nsCOMPtr<nsITimer> timer;
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NS_NewTimerWithCallback(
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getter_AddRefs(timer), cb,
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Preferences::GetUint("accessibility.delay_plugin_time"),
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nsITimer::TYPE_ONE_SHOT);
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sPluginTimers->AppendElement(timer);
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sPendingPlugins->AppendElement(aContent);
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return nullptr;
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}
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// We need to remove aContent from the pending plugins here to avoid
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// reentrancy. When the timer fires it calls
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// DocAccessible::ContentInserted() which does the work async.
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sPendingPlugins->RemoveElement(aContent);
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// Note: pluginPort will be null if windowless.
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HWND pluginPort = nullptr;
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aFrame->GetPluginPort(&pluginPort);
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RefPtr<Accessible> accessible = new HTMLWin32ObjectOwnerAccessible(
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aContent, aContext->Document(), pluginPort);
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return accessible.forget();
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# elif MOZ_ACCESSIBILITY_ATK
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if (!AtkSocketAccessible::gCanEmbed) return nullptr;
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// Note this calls into the plugin, so crazy things may happen and aFrame
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// may go away.
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nsCString plugId;
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nsresult rv = pluginInstance->GetValueFromPlugin(
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NPPVpluginNativeAccessibleAtkPlugId, &plugId);
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if (NS_SUCCEEDED(rv) && !plugId.IsEmpty()) {
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RefPtr<AtkSocketAccessible> socketAccessible =
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new AtkSocketAccessible(aContent, aContext->Document(), plugId);
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return socketAccessible.forget();
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}
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# endif
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}
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#endif
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return nullptr;
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}
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void nsAccessibilityService::DeckPanelSwitched(PresShell* aPresShell,
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nsIContent* aDeckNode,
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nsIFrame* aPrevBoxFrame,
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nsIFrame* aCurrentBoxFrame) {
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// Ignore tabpanels elements (a deck having an accessible) since their
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// children are accessible not depending on selected tab.
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DocAccessible* document = GetDocAccessible(aPresShell);
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if (!document || document->HasAccessible(aDeckNode)) return;
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if (aPrevBoxFrame) {
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nsIContent* panelNode = aPrevBoxFrame->GetContent();
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eTree)) {
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logging::MsgBegin("TREE", "deck panel unselected");
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logging::Node("container", panelNode);
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logging::Node("content", aDeckNode);
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logging::MsgEnd();
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}
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#endif
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document->ContentRemoved(panelNode);
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}
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if (aCurrentBoxFrame) {
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nsIContent* panelNode = aCurrentBoxFrame->GetContent();
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eTree)) {
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logging::MsgBegin("TREE", "deck panel selected");
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logging::Node("container", panelNode);
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logging::Node("content", aDeckNode);
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logging::MsgEnd();
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}
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#endif
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document->ContentInserted(panelNode, panelNode->GetNextSibling());
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}
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}
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|
|
void nsAccessibilityService::ContentRangeInserted(PresShell* aPresShell,
|
|
nsIContent* aStartChild,
|
|
nsIContent* aEndChild) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin("TREE", "content inserted; doc: %p", document);
|
|
logging::Node("container", aStartChild->GetParent());
|
|
for (nsIContent* child = aStartChild; child != aEndChild;
|
|
child = child->GetNextSibling()) {
|
|
logging::Node("content", child);
|
|
}
|
|
logging::MsgEnd();
|
|
logging::Stack();
|
|
}
|
|
#endif
|
|
|
|
if (document) {
|
|
document->ContentInserted(aStartChild, aEndChild);
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::ContentRemoved(PresShell* aPresShell,
|
|
nsIContent* aChildNode) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin("TREE", "content removed; doc: %p", document);
|
|
logging::Node("container node", aChildNode->GetFlattenedTreeParent());
|
|
logging::Node("content node", aChildNode);
|
|
logging::MsgEnd();
|
|
}
|
|
#endif
|
|
|
|
if (document) {
|
|
document->ContentRemoved(aChildNode);
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgEnd();
|
|
logging::Stack();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void nsAccessibilityService::UpdateText(PresShell* aPresShell,
|
|
nsIContent* aContent) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) document->UpdateText(aContent);
|
|
}
|
|
|
|
void nsAccessibilityService::TreeViewChanged(PresShell* aPresShell,
|
|
nsIContent* aContent,
|
|
nsITreeView* aView) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) {
|
|
Accessible* accessible = document->GetAccessible(aContent);
|
|
if (accessible) {
|
|
XULTreeAccessible* treeAcc = accessible->AsXULTree();
|
|
if (treeAcc) treeAcc->TreeViewChanged(aView);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::RangeValueChanged(PresShell* aPresShell,
|
|
nsIContent* aContent) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) {
|
|
Accessible* accessible = document->GetAccessible(aContent);
|
|
if (accessible) {
|
|
document->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE,
|
|
accessible);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::UpdateListBullet(PresShell* aPresShell,
|
|
nsIContent* aHTMLListItemContent,
|
|
bool aHasBullet) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) {
|
|
Accessible* accessible = document->GetAccessible(aHTMLListItemContent);
|
|
if (accessible) {
|
|
HTMLLIAccessible* listItem = accessible->AsHTMLListItem();
|
|
if (listItem) listItem->UpdateBullet(aHasBullet);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::UpdateImageMap(nsImageFrame* aImageFrame) {
|
|
PresShell* presShell = aImageFrame->PresShell();
|
|
DocAccessible* document = GetDocAccessible(presShell);
|
|
if (document) {
|
|
Accessible* accessible = document->GetAccessible(aImageFrame->GetContent());
|
|
if (accessible) {
|
|
HTMLImageMapAccessible* imageMap = accessible->AsImageMap();
|
|
if (imageMap) {
|
|
imageMap->UpdateChildAreas();
|
|
return;
|
|
}
|
|
|
|
// If image map was initialized after we created an accessible (that'll
|
|
// be an image accessible) then recreate it.
|
|
RecreateAccessible(presShell, aImageFrame->GetContent());
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::UpdateLabelValue(PresShell* aPresShell,
|
|
nsIContent* aLabelElm,
|
|
const nsString& aNewValue) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) {
|
|
Accessible* accessible = document->GetAccessible(aLabelElm);
|
|
if (accessible) {
|
|
XULLabelAccessible* xulLabel = accessible->AsXULLabel();
|
|
NS_ASSERTION(xulLabel,
|
|
"UpdateLabelValue was called for wrong accessible!");
|
|
if (xulLabel) xulLabel->UpdateLabelValue(aNewValue);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::PresShellActivated(PresShell* aPresShell) {
|
|
DocAccessible* document = aPresShell->GetDocAccessible();
|
|
if (document) {
|
|
RootAccessible* rootDocument = document->RootAccessible();
|
|
NS_ASSERTION(rootDocument, "Entirely broken tree: no root document!");
|
|
if (rootDocument) rootDocument->DocumentActivated(document);
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::RecreateAccessible(PresShell* aPresShell,
|
|
nsIContent* aContent) {
|
|
DocAccessible* document = GetDocAccessible(aPresShell);
|
|
if (document) document->RecreateAccessible(aContent);
|
|
}
|
|
|
|
void nsAccessibilityService::GetStringRole(uint32_t aRole, nsAString& aString) {
|
|
#define ROLE(geckoRole, stringRole, atkRole, macRole, msaaRole, ia2Role, \
|
|
androidClass, nameRule) \
|
|
case roles::geckoRole: \
|
|
aString.AssignLiteral(stringRole); \
|
|
return;
|
|
|
|
switch (aRole) {
|
|
#include "RoleMap.h"
|
|
default:
|
|
aString.AssignLiteral("unknown");
|
|
return;
|
|
}
|
|
|
|
#undef ROLE
|
|
}
|
|
|
|
void nsAccessibilityService::GetStringStates(uint32_t aState,
|
|
uint32_t aExtraState,
|
|
nsISupports** aStringStates) {
|
|
RefPtr<DOMStringList> stringStates =
|
|
GetStringStates(nsAccUtils::To64State(aState, aExtraState));
|
|
|
|
// unknown state
|
|
if (!stringStates->Length()) {
|
|
stringStates->Add(NS_LITERAL_STRING("unknown"));
|
|
}
|
|
|
|
stringStates.forget(aStringStates);
|
|
}
|
|
|
|
already_AddRefed<DOMStringList> nsAccessibilityService::GetStringStates(
|
|
uint64_t aStates) const {
|
|
RefPtr<DOMStringList> stringStates = new DOMStringList();
|
|
|
|
if (aStates & states::UNAVAILABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("unavailable"));
|
|
}
|
|
if (aStates & states::SELECTED) {
|
|
stringStates->Add(NS_LITERAL_STRING("selected"));
|
|
}
|
|
if (aStates & states::FOCUSED) {
|
|
stringStates->Add(NS_LITERAL_STRING("focused"));
|
|
}
|
|
if (aStates & states::PRESSED) {
|
|
stringStates->Add(NS_LITERAL_STRING("pressed"));
|
|
}
|
|
if (aStates & states::CHECKED) {
|
|
stringStates->Add(NS_LITERAL_STRING("checked"));
|
|
}
|
|
if (aStates & states::MIXED) {
|
|
stringStates->Add(NS_LITERAL_STRING("mixed"));
|
|
}
|
|
if (aStates & states::READONLY) {
|
|
stringStates->Add(NS_LITERAL_STRING("readonly"));
|
|
}
|
|
if (aStates & states::HOTTRACKED) {
|
|
stringStates->Add(NS_LITERAL_STRING("hottracked"));
|
|
}
|
|
if (aStates & states::DEFAULT) {
|
|
stringStates->Add(NS_LITERAL_STRING("default"));
|
|
}
|
|
if (aStates & states::EXPANDED) {
|
|
stringStates->Add(NS_LITERAL_STRING("expanded"));
|
|
}
|
|
if (aStates & states::COLLAPSED) {
|
|
stringStates->Add(NS_LITERAL_STRING("collapsed"));
|
|
}
|
|
if (aStates & states::BUSY) {
|
|
stringStates->Add(NS_LITERAL_STRING("busy"));
|
|
}
|
|
if (aStates & states::FLOATING) {
|
|
stringStates->Add(NS_LITERAL_STRING("floating"));
|
|
}
|
|
if (aStates & states::ANIMATED) {
|
|
stringStates->Add(NS_LITERAL_STRING("animated"));
|
|
}
|
|
if (aStates & states::INVISIBLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("invisible"));
|
|
}
|
|
if (aStates & states::OFFSCREEN) {
|
|
stringStates->Add(NS_LITERAL_STRING("offscreen"));
|
|
}
|
|
if (aStates & states::SIZEABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("sizeable"));
|
|
}
|
|
if (aStates & states::MOVEABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("moveable"));
|
|
}
|
|
if (aStates & states::SELFVOICING) {
|
|
stringStates->Add(NS_LITERAL_STRING("selfvoicing"));
|
|
}
|
|
if (aStates & states::FOCUSABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("focusable"));
|
|
}
|
|
if (aStates & states::SELECTABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("selectable"));
|
|
}
|
|
if (aStates & states::LINKED) {
|
|
stringStates->Add(NS_LITERAL_STRING("linked"));
|
|
}
|
|
if (aStates & states::TRAVERSED) {
|
|
stringStates->Add(NS_LITERAL_STRING("traversed"));
|
|
}
|
|
if (aStates & states::MULTISELECTABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("multiselectable"));
|
|
}
|
|
if (aStates & states::EXTSELECTABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("extselectable"));
|
|
}
|
|
if (aStates & states::PROTECTED) {
|
|
stringStates->Add(NS_LITERAL_STRING("protected"));
|
|
}
|
|
if (aStates & states::HASPOPUP) {
|
|
stringStates->Add(NS_LITERAL_STRING("haspopup"));
|
|
}
|
|
if (aStates & states::REQUIRED) {
|
|
stringStates->Add(NS_LITERAL_STRING("required"));
|
|
}
|
|
if (aStates & states::ALERT) {
|
|
stringStates->Add(NS_LITERAL_STRING("alert"));
|
|
}
|
|
if (aStates & states::INVALID) {
|
|
stringStates->Add(NS_LITERAL_STRING("invalid"));
|
|
}
|
|
if (aStates & states::CHECKABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("checkable"));
|
|
}
|
|
if (aStates & states::SUPPORTS_AUTOCOMPLETION) {
|
|
stringStates->Add(NS_LITERAL_STRING("autocompletion"));
|
|
}
|
|
if (aStates & states::DEFUNCT) {
|
|
stringStates->Add(NS_LITERAL_STRING("defunct"));
|
|
}
|
|
if (aStates & states::SELECTABLE_TEXT) {
|
|
stringStates->Add(NS_LITERAL_STRING("selectable text"));
|
|
}
|
|
if (aStates & states::EDITABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("editable"));
|
|
}
|
|
if (aStates & states::ACTIVE) {
|
|
stringStates->Add(NS_LITERAL_STRING("active"));
|
|
}
|
|
if (aStates & states::MODAL) {
|
|
stringStates->Add(NS_LITERAL_STRING("modal"));
|
|
}
|
|
if (aStates & states::MULTI_LINE) {
|
|
stringStates->Add(NS_LITERAL_STRING("multi line"));
|
|
}
|
|
if (aStates & states::HORIZONTAL) {
|
|
stringStates->Add(NS_LITERAL_STRING("horizontal"));
|
|
}
|
|
if (aStates & states::OPAQUE1) {
|
|
stringStates->Add(NS_LITERAL_STRING("opaque"));
|
|
}
|
|
if (aStates & states::SINGLE_LINE) {
|
|
stringStates->Add(NS_LITERAL_STRING("single line"));
|
|
}
|
|
if (aStates & states::TRANSIENT) {
|
|
stringStates->Add(NS_LITERAL_STRING("transient"));
|
|
}
|
|
if (aStates & states::VERTICAL) {
|
|
stringStates->Add(NS_LITERAL_STRING("vertical"));
|
|
}
|
|
if (aStates & states::STALE) {
|
|
stringStates->Add(NS_LITERAL_STRING("stale"));
|
|
}
|
|
if (aStates & states::ENABLED) {
|
|
stringStates->Add(NS_LITERAL_STRING("enabled"));
|
|
}
|
|
if (aStates & states::SENSITIVE) {
|
|
stringStates->Add(NS_LITERAL_STRING("sensitive"));
|
|
}
|
|
if (aStates & states::EXPANDABLE) {
|
|
stringStates->Add(NS_LITERAL_STRING("expandable"));
|
|
}
|
|
|
|
return stringStates.forget();
|
|
}
|
|
|
|
void nsAccessibilityService::GetStringEventType(uint32_t aEventType,
|
|
nsAString& aString) {
|
|
NS_ASSERTION(
|
|
nsIAccessibleEvent::EVENT_LAST_ENTRY == ArrayLength(kEventTypeNames),
|
|
"nsIAccessibleEvent constants are out of sync to kEventTypeNames");
|
|
|
|
if (aEventType >= ArrayLength(kEventTypeNames)) {
|
|
aString.AssignLiteral("unknown");
|
|
return;
|
|
}
|
|
|
|
aString.AssignASCII(kEventTypeNames[aEventType]);
|
|
}
|
|
|
|
void nsAccessibilityService::GetStringEventType(uint32_t aEventType,
|
|
nsACString& aString) {
|
|
MOZ_ASSERT(
|
|
nsIAccessibleEvent::EVENT_LAST_ENTRY == ArrayLength(kEventTypeNames),
|
|
"nsIAccessibleEvent constants are out of sync to kEventTypeNames");
|
|
|
|
if (aEventType >= ArrayLength(kEventTypeNames)) {
|
|
aString.AssignLiteral("unknown");
|
|
return;
|
|
}
|
|
|
|
aString = nsDependentCString(kEventTypeNames[aEventType]);
|
|
}
|
|
|
|
void nsAccessibilityService::GetStringRelationType(uint32_t aRelationType,
|
|
nsAString& aString) {
|
|
NS_ENSURE_TRUE_VOID(aRelationType <=
|
|
static_cast<uint32_t>(RelationType::LAST));
|
|
|
|
#define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
|
|
case RelationType::geckoType: \
|
|
aString.AssignLiteral(geckoTypeName); \
|
|
return;
|
|
|
|
RelationType relationType = static_cast<RelationType>(aRelationType);
|
|
switch (relationType) {
|
|
#include "RelationTypeMap.h"
|
|
default:
|
|
aString.AssignLiteral("unknown");
|
|
return;
|
|
}
|
|
|
|
#undef RELATIONTYPE
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsAccessibilityService public
|
|
|
|
Accessible* nsAccessibilityService::CreateAccessible(nsINode* aNode,
|
|
Accessible* aContext,
|
|
bool* aIsSubtreeHidden) {
|
|
MOZ_ASSERT(aContext, "No context provided");
|
|
MOZ_ASSERT(aNode, "No node to create an accessible for");
|
|
MOZ_ASSERT(gConsumers, "No creation after shutdown");
|
|
|
|
if (aIsSubtreeHidden) *aIsSubtreeHidden = false;
|
|
|
|
DocAccessible* document = aContext->Document();
|
|
MOZ_ASSERT(!document->GetAccessible(aNode),
|
|
"We already have an accessible for this node.");
|
|
|
|
if (aNode->IsDocument()) {
|
|
// If it's document node then ask accessible document loader for
|
|
// document accessible, otherwise return null.
|
|
return GetDocAccessible(aNode->AsDocument());
|
|
}
|
|
|
|
// We have a content node.
|
|
if (!aNode->GetComposedDoc()) {
|
|
NS_WARNING("Creating accessible for node with no document");
|
|
return nullptr;
|
|
}
|
|
|
|
if (aNode->OwnerDoc() != document->DocumentNode()) {
|
|
NS_ERROR("Creating accessible for wrong document");
|
|
return nullptr;
|
|
}
|
|
|
|
if (!aNode->IsContent()) return nullptr;
|
|
|
|
nsIContent* content = aNode->AsContent();
|
|
if (aria::HasDefinedARIAHidden(content)) {
|
|
if (aIsSubtreeHidden) {
|
|
*aIsSubtreeHidden = true;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Check frame and its visibility. Note, hidden frame allows visible
|
|
// elements in subtree.
|
|
nsIFrame* frame = content->GetPrimaryFrame();
|
|
if (!frame || !frame->StyleVisibility()->IsVisible()) {
|
|
// display:contents element doesn't have a frame, but retains the semantics.
|
|
// All its children are unaffected.
|
|
if (content->IsElement() && content->AsElement()->IsDisplayContents()) {
|
|
const HTMLMarkupMapInfo* markupMap =
|
|
mHTMLMarkupMap.Get(content->NodeInfo()->NameAtom());
|
|
if (markupMap && markupMap->new_func) {
|
|
RefPtr<Accessible> newAcc =
|
|
markupMap->new_func(content->AsElement(), aContext);
|
|
if (newAcc) {
|
|
document->BindToDocument(newAcc,
|
|
aria::GetRoleMap(content->AsElement()));
|
|
}
|
|
return newAcc;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
if (aIsSubtreeHidden && !frame) *aIsSubtreeHidden = true;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
if (frame->GetContent() != content) {
|
|
// Not the main content for this frame. This happens because <area>
|
|
// elements return the image frame as their primary frame. The main content
|
|
// for the image frame is the image content. If the frame is not an image
|
|
// frame or the node is not an area element then null is returned.
|
|
// This setup will change when bug 135040 is fixed. Make sure we don't
|
|
// create area accessible here. Hopefully assertion below will handle that.
|
|
|
|
#ifdef DEBUG
|
|
nsImageFrame* imageFrame = do_QueryFrame(frame);
|
|
NS_ASSERTION(imageFrame && content->IsHTMLElement(nsGkAtoms::area),
|
|
"Unknown case of not main content for the frame!");
|
|
#endif
|
|
return nullptr;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsImageFrame* imageFrame = do_QueryFrame(frame);
|
|
NS_ASSERTION(!imageFrame || !content->IsHTMLElement(nsGkAtoms::area),
|
|
"Image map manages the area accessible creation!");
|
|
#endif
|
|
|
|
// Attempt to create an accessible based on what we know.
|
|
RefPtr<Accessible> newAcc;
|
|
|
|
// Create accessible for visible text frames.
|
|
if (content->IsText()) {
|
|
nsIFrame::RenderedText text = frame->GetRenderedText(
|
|
0, UINT32_MAX, nsIFrame::TextOffsetType::OffsetsInContentText,
|
|
nsIFrame::TrailingWhitespace::DontTrim);
|
|
// Ignore not rendered text nodes and whitespace text nodes between table
|
|
// cells.
|
|
if (text.mString.IsEmpty() ||
|
|
(aContext->IsTableRow() &&
|
|
nsCoreUtils::IsWhitespaceString(text.mString))) {
|
|
if (aIsSubtreeHidden) *aIsSubtreeHidden = true;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
newAcc = CreateAccessibleByFrameType(frame, content, aContext);
|
|
document->BindToDocument(newAcc, nullptr);
|
|
newAcc->AsTextLeaf()->SetText(text.mString);
|
|
return newAcc;
|
|
}
|
|
|
|
if (content->IsHTMLElement(nsGkAtoms::map)) {
|
|
// Create hyper text accessible for HTML map if it is used to group links
|
|
// (see http://www.w3.org/TR/WCAG10-HTML-TECHS/#group-bypass). If the HTML
|
|
// map rect is empty then it is used for links grouping. Otherwise it should
|
|
// be used in conjunction with HTML image element and in this case we don't
|
|
// create any accessible for it and don't walk into it. The accessibles for
|
|
// HTML area (HTMLAreaAccessible) the map contains are attached as
|
|
// children of the appropriate accessible for HTML image
|
|
// (ImageAccessible).
|
|
if (nsLayoutUtils::GetAllInFlowRectsUnion(frame, frame->GetParent())
|
|
.IsEmpty()) {
|
|
if (aIsSubtreeHidden) *aIsSubtreeHidden = true;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
newAcc = new HyperTextAccessibleWrap(content, document);
|
|
document->BindToDocument(newAcc, aria::GetRoleMap(content->AsElement()));
|
|
return newAcc;
|
|
}
|
|
|
|
const nsRoleMapEntry* roleMapEntry = aria::GetRoleMap(content->AsElement());
|
|
|
|
// If the element is focusable or global ARIA attribute is applied to it or
|
|
// it is referenced by ARIA relationship then treat role="presentation" on
|
|
// the element as the role is not there.
|
|
if (roleMapEntry && (roleMapEntry->Is(nsGkAtoms::presentation) ||
|
|
roleMapEntry->Is(nsGkAtoms::none))) {
|
|
if (!MustBeAccessible(content, document)) return nullptr;
|
|
|
|
roleMapEntry = nullptr;
|
|
}
|
|
|
|
if (!newAcc && content->IsHTMLElement()) { // HTML accessibles
|
|
bool isARIATablePart = roleMapEntry && (roleMapEntry->accTypes &
|
|
(eTableCell | eTableRow | eTable));
|
|
|
|
if (!isARIATablePart || frame->AccessibleType() == eHTMLTableCellType ||
|
|
frame->AccessibleType() == eHTMLTableRowType ||
|
|
frame->AccessibleType() == eHTMLTableType) {
|
|
// Prefer to use markup to decide if and what kind of accessible to
|
|
// create,
|
|
const HTMLMarkupMapInfo* markupMap =
|
|
mHTMLMarkupMap.Get(content->NodeInfo()->NameAtom());
|
|
if (markupMap && markupMap->new_func)
|
|
newAcc = markupMap->new_func(content->AsElement(), aContext);
|
|
|
|
if (!newAcc) // try by frame accessible type.
|
|
newAcc = CreateAccessibleByFrameType(frame, content, aContext);
|
|
}
|
|
|
|
// In case of ARIA grid or table use table-specific classes if it's not
|
|
// native table based.
|
|
if (isARIATablePart && (!newAcc || newAcc->IsGenericHyperText())) {
|
|
if ((roleMapEntry->accTypes & eTableCell)) {
|
|
if (aContext->IsTableRow())
|
|
newAcc = new ARIAGridCellAccessibleWrap(content, document);
|
|
|
|
} else if (roleMapEntry->IsOfType(eTableRow)) {
|
|
if (aContext->IsTable() ||
|
|
(aContext->Parent() && aContext->Parent()->IsTable())) {
|
|
newAcc = new ARIARowAccessible(content, document);
|
|
}
|
|
|
|
} else if (roleMapEntry->IsOfType(eTable)) {
|
|
newAcc = new ARIAGridAccessibleWrap(content, document);
|
|
}
|
|
}
|
|
|
|
// If table has strong ARIA role then all table descendants shouldn't
|
|
// expose their native roles.
|
|
if (!roleMapEntry && newAcc && aContext->HasStrongARIARole()) {
|
|
if (frame->AccessibleType() == eHTMLTableRowType) {
|
|
const nsRoleMapEntry* contextRoleMap = aContext->ARIARoleMap();
|
|
if (!contextRoleMap->IsOfType(eTable))
|
|
roleMapEntry = &aria::gEmptyRoleMap;
|
|
|
|
} else if (frame->AccessibleType() == eHTMLTableCellType &&
|
|
aContext->ARIARoleMap() == &aria::gEmptyRoleMap) {
|
|
roleMapEntry = &aria::gEmptyRoleMap;
|
|
|
|
} else if (content->IsAnyOfHTMLElements(nsGkAtoms::dt, nsGkAtoms::li,
|
|
nsGkAtoms::dd) ||
|
|
frame->AccessibleType() == eHTMLLiType) {
|
|
const nsRoleMapEntry* contextRoleMap = aContext->ARIARoleMap();
|
|
if (!contextRoleMap->IsOfType(eList))
|
|
roleMapEntry = &aria::gEmptyRoleMap;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Accessible XBL types and deck stuff are used in XUL only currently.
|
|
if (!newAcc && content->IsXULElement()) {
|
|
// No accessible for not selected deck panel and its children.
|
|
if (!aContext->IsXULTabpanels()) {
|
|
nsDeckFrame* deckFrame = do_QueryFrame(frame->GetParent());
|
|
if (deckFrame && deckFrame->GetSelectedBox() != frame) {
|
|
if (aIsSubtreeHidden) *aIsSubtreeHidden = true;
|
|
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
#ifdef MOZ_XUL
|
|
// Prefer to use XUL to decide if and what kind of accessible to create.
|
|
const XULMarkupMapInfo* xulMap =
|
|
mXULMarkupMap.Get(content->NodeInfo()->NameAtom());
|
|
if (xulMap && xulMap->new_func) {
|
|
newAcc = xulMap->new_func(content->AsElement(), aContext);
|
|
}
|
|
#endif
|
|
|
|
// Any XUL box can be used as tabpanel, make sure we create a proper
|
|
// accessible for it.
|
|
if (!newAcc && aContext->IsXULTabpanels() &&
|
|
content->GetParent() == aContext->GetContent()) {
|
|
LayoutFrameType frameType = frame->Type();
|
|
if (frameType == LayoutFrameType::Box ||
|
|
frameType == LayoutFrameType::Scroll) {
|
|
newAcc = new XULTabpanelAccessible(content, document);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!newAcc) {
|
|
if (content->IsSVGElement()) {
|
|
SVGGeometryFrame* geometryFrame = do_QueryFrame(frame);
|
|
if (geometryFrame) {
|
|
// A graphic elements: rect, circle, ellipse, line, path, polygon,
|
|
// polyline and image. A 'use' and 'text' graphic elements require
|
|
// special support.
|
|
newAcc = new EnumRoleAccessible<roles::GRAPHIC>(content, document);
|
|
} else if (content->IsSVGElement(nsGkAtoms::svg)) {
|
|
newAcc = new EnumRoleAccessible<roles::DIAGRAM>(content, document);
|
|
}
|
|
|
|
} else if (content->IsMathMLElement()) {
|
|
const HTMLMarkupMapInfo* markupMap =
|
|
mHTMLMarkupMap.Get(content->NodeInfo()->NameAtom());
|
|
if (markupMap && markupMap->new_func)
|
|
newAcc = markupMap->new_func(content->AsElement(), aContext);
|
|
|
|
// Fall back to text when encountering Content MathML.
|
|
if (!newAcc && !content->IsAnyOfMathMLElements(
|
|
nsGkAtoms::annotation_, nsGkAtoms::annotation_xml_,
|
|
nsGkAtoms::mpadded_, nsGkAtoms::mphantom_,
|
|
nsGkAtoms::maligngroup_, nsGkAtoms::malignmark_,
|
|
nsGkAtoms::mspace_, nsGkAtoms::semantics_)) {
|
|
newAcc = new HyperTextAccessible(content, document);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If no accessible, see if we need to create a generic accessible because
|
|
// of some property that makes this object interesting
|
|
// We don't do this for <body>, <html>, <window>, <dialog> etc. which
|
|
// correspond to the doc accessible and will be created in any case
|
|
if (!newAcc && !content->IsHTMLElement(nsGkAtoms::body) &&
|
|
content->GetParent() &&
|
|
(roleMapEntry || MustBeAccessible(content, document) ||
|
|
(content->IsHTMLElement() && nsCoreUtils::HasClickListener(content)))) {
|
|
// This content is focusable or has an interesting dynamic content
|
|
// accessibility property. If it's interesting we need it in the
|
|
// accessibility hierarchy so that events or other accessibles can point to
|
|
// it, or so that it can hold a state, etc.
|
|
if (content->IsHTMLElement()) {
|
|
// Interesting HTML container which may have selectable text and/or
|
|
// embedded objects
|
|
newAcc = new HyperTextAccessibleWrap(content, document);
|
|
} else { // XUL, SVG, MathML etc.
|
|
// Interesting generic non-HTML container
|
|
newAcc = new AccessibleWrap(content, document);
|
|
}
|
|
}
|
|
|
|
if (newAcc) {
|
|
document->BindToDocument(newAcc, roleMapEntry);
|
|
}
|
|
return newAcc;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsAccessibilityService private
|
|
|
|
bool nsAccessibilityService::Init() {
|
|
// Initialize accessible document manager.
|
|
if (!DocManager::Init()) return false;
|
|
|
|
// Add observers.
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
if (!observerService) return false;
|
|
|
|
observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
|
|
|
|
#if defined(XP_WIN)
|
|
// This information needs to be initialized before the observer fires.
|
|
if (XRE_IsParentProcess()) {
|
|
Compatibility::Init();
|
|
}
|
|
#endif // defined(XP_WIN)
|
|
|
|
// Subscribe to EventListenerService.
|
|
nsCOMPtr<nsIEventListenerService> eventListenerService =
|
|
do_GetService("@mozilla.org/eventlistenerservice;1");
|
|
if (!eventListenerService) return false;
|
|
|
|
eventListenerService->AddListenerChangeListener(this);
|
|
|
|
for (uint32_t i = 0; i < ArrayLength(sHTMLMarkupMapList); i++)
|
|
mHTMLMarkupMap.Put(sHTMLMarkupMapList[i].tag, &sHTMLMarkupMapList[i]);
|
|
|
|
#ifdef MOZ_XUL
|
|
for (uint32_t i = 0; i < ArrayLength(sXULMarkupMapList); i++)
|
|
mXULMarkupMap.Put(sXULMarkupMapList[i].tag, &sXULMarkupMapList[i]);
|
|
#endif
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::CheckEnv();
|
|
#endif
|
|
|
|
gAccessibilityService = this;
|
|
NS_ADDREF(gAccessibilityService); // will release in Shutdown()
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
gApplicationAccessible = new ApplicationAccessibleWrap();
|
|
} else {
|
|
#if defined(XP_WIN)
|
|
dom::ContentChild* contentChild = dom::ContentChild::GetSingleton();
|
|
MOZ_ASSERT(contentChild);
|
|
// If we were instantiated by the chrome process, GetMsaaID() will return
|
|
// a non-zero value and we may safely continue with initialization.
|
|
if (!contentChild->GetMsaaID()) {
|
|
// Since we were not instantiated by chrome, we need to synchronously
|
|
// obtain a MSAA content process id.
|
|
contentChild->SendGetA11yContentId();
|
|
}
|
|
|
|
gApplicationAccessible = new ApplicationAccessibleWrap();
|
|
#else
|
|
gApplicationAccessible = new ApplicationAccessible();
|
|
#endif // defined(XP_WIN)
|
|
}
|
|
|
|
NS_ADDREF(gApplicationAccessible); // will release in Shutdown()
|
|
gApplicationAccessible->Init();
|
|
|
|
CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::Accessibility,
|
|
NS_LITERAL_CSTRING("Active"));
|
|
|
|
#ifdef XP_WIN
|
|
sPendingPlugins = new nsTArray<nsCOMPtr<nsIContent> >;
|
|
sPluginTimers = new nsTArray<nsCOMPtr<nsITimer> >;
|
|
#endif
|
|
|
|
// Now its safe to start platform accessibility.
|
|
if (XRE_IsParentProcess()) PlatformInit();
|
|
|
|
statistics::A11yInitialized();
|
|
|
|
static const char16_t kInitIndicator[] = {'1', 0};
|
|
observerService->NotifyObservers(nullptr, "a11y-init-or-shutdown",
|
|
kInitIndicator);
|
|
|
|
return true;
|
|
}
|
|
|
|
void nsAccessibilityService::Shutdown() {
|
|
// Application is going to be closed, shutdown accessibility and mark
|
|
// accessibility service as shutdown to prevent calls of its methods.
|
|
// Don't null accessibility service static member at this point to be safe
|
|
// if someone will try to operate with it.
|
|
|
|
MOZ_ASSERT(gConsumers, "Accessibility was shutdown already");
|
|
UnsetConsumers(eXPCOM | eMainProcess | ePlatformAPI);
|
|
|
|
// Remove observers.
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
if (observerService) {
|
|
observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
|
|
}
|
|
|
|
// Stop accessible document loader.
|
|
DocManager::Shutdown();
|
|
|
|
SelectionManager::Shutdown();
|
|
|
|
#ifdef XP_WIN
|
|
sPendingPlugins = nullptr;
|
|
|
|
uint32_t timerCount = sPluginTimers->Length();
|
|
for (uint32_t i = 0; i < timerCount; i++)
|
|
sPluginTimers->ElementAt(i)->Cancel();
|
|
|
|
sPluginTimers = nullptr;
|
|
#endif
|
|
|
|
if (XRE_IsParentProcess()) PlatformShutdown();
|
|
|
|
gApplicationAccessible->Shutdown();
|
|
NS_RELEASE(gApplicationAccessible);
|
|
gApplicationAccessible = nullptr;
|
|
|
|
NS_IF_RELEASE(gXPCApplicationAccessible);
|
|
gXPCApplicationAccessible = nullptr;
|
|
|
|
NS_RELEASE(gAccessibilityService);
|
|
gAccessibilityService = nullptr;
|
|
|
|
if (observerService) {
|
|
static const char16_t kShutdownIndicator[] = {'0', 0};
|
|
observerService->NotifyObservers(nullptr, "a11y-init-or-shutdown",
|
|
kShutdownIndicator);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<Accessible>
|
|
nsAccessibilityService::CreateAccessibleByFrameType(nsIFrame* aFrame,
|
|
nsIContent* aContent,
|
|
Accessible* aContext) {
|
|
DocAccessible* document = aContext->Document();
|
|
|
|
RefPtr<Accessible> newAcc;
|
|
switch (aFrame->AccessibleType()) {
|
|
case eNoType:
|
|
return nullptr;
|
|
case eHTMLBRType:
|
|
newAcc = new HTMLBRAccessible(aContent, document);
|
|
break;
|
|
case eHTMLButtonType:
|
|
newAcc = new HTMLButtonAccessible(aContent, document);
|
|
break;
|
|
case eHTMLCanvasType:
|
|
newAcc = new HTMLCanvasAccessible(aContent, document);
|
|
break;
|
|
case eHTMLCaptionType:
|
|
if (aContext->IsTable() &&
|
|
aContext->GetContent() == aContent->GetParent()) {
|
|
newAcc = new HTMLCaptionAccessible(aContent, document);
|
|
}
|
|
break;
|
|
case eHTMLCheckboxType:
|
|
newAcc = new CheckboxAccessible(aContent, document);
|
|
break;
|
|
case eHTMLComboboxType:
|
|
newAcc = new HTMLComboboxAccessible(aContent, document);
|
|
break;
|
|
case eHTMLFileInputType:
|
|
newAcc = new HTMLFileInputAccessible(aContent, document);
|
|
break;
|
|
case eHTMLGroupboxType:
|
|
newAcc = new HTMLGroupboxAccessible(aContent, document);
|
|
break;
|
|
case eHTMLHRType:
|
|
newAcc = new HTMLHRAccessible(aContent, document);
|
|
break;
|
|
case eHTMLImageMapType:
|
|
newAcc = new HTMLImageMapAccessible(aContent, document);
|
|
break;
|
|
case eHTMLLiType:
|
|
if (aContext->IsList() &&
|
|
aContext->GetContent() == aContent->GetParent()) {
|
|
newAcc = new HTMLLIAccessible(aContent, document);
|
|
} else {
|
|
// Otherwise create a generic text accessible to avoid text jamming.
|
|
newAcc = new HyperTextAccessibleWrap(aContent, document);
|
|
}
|
|
break;
|
|
case eHTMLSelectListType:
|
|
newAcc = new HTMLSelectListAccessible(aContent, document);
|
|
break;
|
|
case eHTMLMediaType:
|
|
newAcc = new EnumRoleAccessible<roles::GROUPING>(aContent, document);
|
|
break;
|
|
case eHTMLRadioButtonType:
|
|
newAcc = new HTMLRadioButtonAccessible(aContent, document);
|
|
break;
|
|
case eHTMLRangeType:
|
|
newAcc = new HTMLRangeAccessible(aContent, document);
|
|
break;
|
|
case eHTMLSpinnerType:
|
|
newAcc = new HTMLSpinnerAccessible(aContent, document);
|
|
break;
|
|
case eHTMLTableType:
|
|
if (aContent->IsHTMLElement(nsGkAtoms::table))
|
|
newAcc = new HTMLTableAccessibleWrap(aContent, document);
|
|
else
|
|
newAcc = new HyperTextAccessibleWrap(aContent, document);
|
|
break;
|
|
case eHTMLTableCellType:
|
|
// Accessible HTML table cell should be a child of accessible HTML table
|
|
// or its row (CSS HTML tables are polite to the used markup at
|
|
// certain degree).
|
|
// Otherwise create a generic text accessible to avoid text jamming
|
|
// when reading by AT.
|
|
if (aContext->IsHTMLTableRow() || aContext->IsHTMLTable())
|
|
newAcc = new HTMLTableCellAccessibleWrap(aContent, document);
|
|
else
|
|
newAcc = new HyperTextAccessibleWrap(aContent, document);
|
|
break;
|
|
|
|
case eHTMLTableRowType: {
|
|
// Accessible HTML table row may be a child of tbody/tfoot/thead of
|
|
// accessible HTML table or a direct child of accessible of HTML table.
|
|
Accessible* table = aContext->IsTable() ? aContext : nullptr;
|
|
if (!table && aContext->Parent() && aContext->Parent()->IsTable())
|
|
table = aContext->Parent();
|
|
|
|
if (table) {
|
|
nsIContent* parentContent =
|
|
aContent->GetParentOrHostNode()->AsContent();
|
|
nsIFrame* parentFrame = nullptr;
|
|
if (parentContent) {
|
|
parentFrame = parentContent->GetPrimaryFrame();
|
|
if (!parentFrame || !parentFrame->IsTableWrapperFrame()) {
|
|
parentContent = parentContent->GetParentOrHostNode()->AsContent();
|
|
if (parentContent) {
|
|
parentFrame = parentContent->GetPrimaryFrame();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (parentFrame && parentFrame->IsTableWrapperFrame() &&
|
|
table->GetContent() == parentContent) {
|
|
newAcc = new HTMLTableRowAccessible(aContent, document);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case eHTMLTextFieldType:
|
|
newAcc = new HTMLTextFieldAccessible(aContent, document);
|
|
break;
|
|
case eHyperTextType:
|
|
if (!aContent->IsAnyOfHTMLElements(nsGkAtoms::dt, nsGkAtoms::dd,
|
|
nsGkAtoms::div)) {
|
|
newAcc = new HyperTextAccessibleWrap(aContent, document);
|
|
}
|
|
break;
|
|
|
|
case eImageType:
|
|
newAcc = new ImageAccessibleWrap(aContent, document);
|
|
break;
|
|
case eOuterDocType:
|
|
newAcc = new OuterDocAccessible(aContent, document);
|
|
break;
|
|
case ePluginType: {
|
|
nsPluginFrame* pluginFrame = do_QueryFrame(aFrame);
|
|
newAcc = CreatePluginAccessible(pluginFrame, aContent, aContext);
|
|
break;
|
|
}
|
|
case eTextLeafType:
|
|
newAcc = new TextLeafAccessibleWrap(aContent, document);
|
|
break;
|
|
default:
|
|
MOZ_ASSERT(false);
|
|
break;
|
|
}
|
|
|
|
return newAcc.forget();
|
|
}
|
|
|
|
void nsAccessibilityService::MarkupAttributes(
|
|
const nsIContent* aContent, nsIPersistentProperties* aAttributes) const {
|
|
const mozilla::a11y::HTMLMarkupMapInfo* markupMap =
|
|
mHTMLMarkupMap.Get(aContent->NodeInfo()->NameAtom());
|
|
if (!markupMap) return;
|
|
|
|
for (uint32_t i = 0; i < ArrayLength(markupMap->attrs); i++) {
|
|
const MarkupAttrInfo* info = markupMap->attrs + i;
|
|
if (!info->name) break;
|
|
|
|
if (info->DOMAttrName) {
|
|
if (info->DOMAttrValue) {
|
|
if (aContent->IsElement() && aContent->AsElement()->AttrValueIs(
|
|
kNameSpaceID_None, info->DOMAttrName,
|
|
info->DOMAttrValue, eCaseMatters)) {
|
|
nsAccUtils::SetAccAttr(aAttributes, info->name, info->DOMAttrValue);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
nsAutoString value;
|
|
|
|
if (aContent->IsElement()) {
|
|
aContent->AsElement()->GetAttr(kNameSpaceID_None, info->DOMAttrName,
|
|
value);
|
|
}
|
|
|
|
if (!value.IsEmpty())
|
|
nsAccUtils::SetAccAttr(aAttributes, info->name, value);
|
|
|
|
continue;
|
|
}
|
|
|
|
nsAccUtils::SetAccAttr(aAttributes, info->name, info->value);
|
|
}
|
|
}
|
|
|
|
Accessible* nsAccessibilityService::AddNativeRootAccessible(
|
|
void* aAtkAccessible) {
|
|
#ifdef MOZ_ACCESSIBILITY_ATK
|
|
ApplicationAccessible* applicationAcc = ApplicationAcc();
|
|
if (!applicationAcc) return nullptr;
|
|
|
|
GtkWindowAccessible* nativeWnd =
|
|
new GtkWindowAccessible(static_cast<AtkObject*>(aAtkAccessible));
|
|
|
|
if (applicationAcc->AppendChild(nativeWnd)) return nativeWnd;
|
|
#endif
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void nsAccessibilityService::RemoveNativeRootAccessible(
|
|
Accessible* aAccessible) {
|
|
#ifdef MOZ_ACCESSIBILITY_ATK
|
|
ApplicationAccessible* applicationAcc = ApplicationAcc();
|
|
|
|
if (applicationAcc) applicationAcc->RemoveChild(aAccessible);
|
|
#endif
|
|
}
|
|
|
|
bool nsAccessibilityService::HasAccessible(nsINode* aDOMNode) {
|
|
if (!aDOMNode) return false;
|
|
|
|
DocAccessible* document = GetDocAccessible(aDOMNode->OwnerDoc());
|
|
if (!document) return false;
|
|
|
|
return document->HasAccessible(aDOMNode);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsAccessibilityService private (DON'T put methods here)
|
|
|
|
void nsAccessibilityService::SetConsumers(uint32_t aConsumers, bool aNotify) {
|
|
if (gConsumers & aConsumers) {
|
|
return;
|
|
}
|
|
|
|
gConsumers |= aConsumers;
|
|
if (aNotify) {
|
|
NotifyOfConsumersChange();
|
|
}
|
|
}
|
|
|
|
void nsAccessibilityService::UnsetConsumers(uint32_t aConsumers) {
|
|
if (!(gConsumers & aConsumers)) {
|
|
return;
|
|
}
|
|
|
|
gConsumers &= ~aConsumers;
|
|
NotifyOfConsumersChange();
|
|
}
|
|
|
|
void nsAccessibilityService::GetConsumers(nsAString& aString) {
|
|
const char16_t* kJSONFmt =
|
|
u"{ \"XPCOM\": %s, \"MainProcess\": %s, \"PlatformAPI\": %s }";
|
|
nsString json;
|
|
nsTextFormatter::ssprintf(json, kJSONFmt,
|
|
gConsumers & eXPCOM ? "true" : "false",
|
|
gConsumers & eMainProcess ? "true" : "false",
|
|
gConsumers & ePlatformAPI ? "true" : "false");
|
|
aString.Assign(json);
|
|
}
|
|
|
|
void nsAccessibilityService::NotifyOfConsumersChange() {
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
|
|
if (!observerService) {
|
|
return;
|
|
}
|
|
|
|
nsAutoString consumers;
|
|
GetConsumers(consumers);
|
|
observerService->NotifyObservers(nullptr, "a11y-consumers-changed",
|
|
consumers.get());
|
|
}
|
|
|
|
nsAccessibilityService* GetOrCreateAccService(uint32_t aNewConsumer) {
|
|
// Do not initialize accessibility if it is force disabled.
|
|
if (PlatformDisabledState() == ePlatformIsDisabled) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!nsAccessibilityService::gAccessibilityService) {
|
|
RefPtr<nsAccessibilityService> service = new nsAccessibilityService();
|
|
if (!service->Init()) {
|
|
service->Shutdown();
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(nsAccessibilityService::gAccessibilityService,
|
|
"Accessible service is not initialized.");
|
|
nsAccessibilityService::gAccessibilityService->SetConsumers(aNewConsumer);
|
|
return nsAccessibilityService::gAccessibilityService;
|
|
}
|
|
|
|
void MaybeShutdownAccService(uint32_t aFormerConsumer) {
|
|
nsAccessibilityService* accService =
|
|
nsAccessibilityService::gAccessibilityService;
|
|
|
|
if (!accService || nsAccessibilityService::IsShutdown()) {
|
|
return;
|
|
}
|
|
|
|
// Still used by XPCOM
|
|
if (nsCoreUtils::AccEventObserversExist() ||
|
|
xpcAccessibilityService::IsInUse() || accService->HasXPCDocuments()) {
|
|
// In case the XPCOM flag was unset (possibly because of the shutdown
|
|
// timer in the xpcAccessibilityService) ensure it is still present. Note:
|
|
// this should be fixed when all the consumer logic is taken out as a
|
|
// separate class.
|
|
accService->SetConsumers(nsAccessibilityService::eXPCOM, false);
|
|
|
|
if (aFormerConsumer != nsAccessibilityService::eXPCOM) {
|
|
// Only unset non-XPCOM consumers.
|
|
accService->UnsetConsumers(aFormerConsumer);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (nsAccessibilityService::gConsumers & ~aFormerConsumer) {
|
|
accService->UnsetConsumers(aFormerConsumer);
|
|
} else {
|
|
accService
|
|
->Shutdown(); // Will unset all nsAccessibilityService::gConsumers
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Services
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
namespace mozilla {
|
|
namespace a11y {
|
|
|
|
FocusManager* FocusMgr() {
|
|
return nsAccessibilityService::gAccessibilityService;
|
|
}
|
|
|
|
SelectionManager* SelectionMgr() {
|
|
return nsAccessibilityService::gAccessibilityService;
|
|
}
|
|
|
|
ApplicationAccessible* ApplicationAcc() {
|
|
return nsAccessibilityService::gApplicationAccessible;
|
|
}
|
|
|
|
xpcAccessibleApplication* XPCApplicationAcc() {
|
|
if (!nsAccessibilityService::gXPCApplicationAccessible &&
|
|
nsAccessibilityService::gApplicationAccessible) {
|
|
nsAccessibilityService::gXPCApplicationAccessible =
|
|
new xpcAccessibleApplication(
|
|
nsAccessibilityService::gApplicationAccessible);
|
|
NS_ADDREF(nsAccessibilityService::gXPCApplicationAccessible);
|
|
}
|
|
|
|
return nsAccessibilityService::gXPCApplicationAccessible;
|
|
}
|
|
|
|
EPlatformDisabledState PlatformDisabledState() {
|
|
static bool platformDisabledStateCached = false;
|
|
if (platformDisabledStateCached) {
|
|
return static_cast<EPlatformDisabledState>(sPlatformDisabledState);
|
|
}
|
|
|
|
platformDisabledStateCached = true;
|
|
Preferences::RegisterCallback(PrefChanged, PREF_ACCESSIBILITY_FORCE_DISABLED);
|
|
return ReadPlatformDisabledState();
|
|
}
|
|
|
|
EPlatformDisabledState ReadPlatformDisabledState() {
|
|
sPlatformDisabledState =
|
|
Preferences::GetInt(PREF_ACCESSIBILITY_FORCE_DISABLED, 0);
|
|
if (sPlatformDisabledState < ePlatformIsForceEnabled) {
|
|
sPlatformDisabledState = ePlatformIsForceEnabled;
|
|
} else if (sPlatformDisabledState > ePlatformIsDisabled) {
|
|
sPlatformDisabledState = ePlatformIsDisabled;
|
|
}
|
|
|
|
return static_cast<EPlatformDisabledState>(sPlatformDisabledState);
|
|
}
|
|
|
|
void PrefChanged(const char* aPref, void* aClosure) {
|
|
if (ReadPlatformDisabledState() == ePlatformIsDisabled) {
|
|
// Force shut down accessibility.
|
|
nsAccessibilityService* accService =
|
|
nsAccessibilityService::gAccessibilityService;
|
|
if (accService && !nsAccessibilityService::IsShutdown()) {
|
|
accService->Shutdown();
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace a11y
|
|
} // namespace mozilla
|