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mozAccessible.mm
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/* -*- Mode: Objective-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/. */
#import "mozAccessible.h"
#import "MacUtils.h"
#import "mozView.h"
#include "Accessible-inl.h"
#include "nsAccUtils.h"
#include "nsIAccessibleRelation.h"
#include "nsIAccessibleEditableText.h"
#include "nsIPersistentProperties2.h"
#include "Relation.h"
#include "Role.h"
#include "RootAccessible.h"
#include "TableAccessible.h"
#include "TableCellAccessible.h"
#include "mozilla/a11y/PDocAccessible.h"
#include "mozilla/Services.h"
#include "nsRect.h"
#include "nsCocoaUtils.h"
#include "nsCoord.h"
#include "nsObjCExceptions.h"
#include "nsWhitespaceTokenizer.h"
#include <prdtoa.h>
using namespace mozilla;
using namespace mozilla::a11y;
#define NSAccessibilityMathRootRadicandAttribute @"AXMathRootRadicand"
#define NSAccessibilityMathRootIndexAttribute @"AXMathRootIndex"
#define NSAccessibilityMathFractionNumeratorAttribute @"AXMathFractionNumerator"
#define NSAccessibilityMathFractionDenominatorAttribute @"AXMathFractionDenominator"
#define NSAccessibilityMathBaseAttribute @"AXMathBase"
#define NSAccessibilityMathSubscriptAttribute @"AXMathSubscript"
#define NSAccessibilityMathSuperscriptAttribute @"AXMathSuperscript"
#define NSAccessibilityMathUnderAttribute @"AXMathUnder"
#define NSAccessibilityMathOverAttribute @"AXMathOver"
#define NSAccessibilityMathLineThicknessAttribute @"AXMathLineThickness"
// XXX WebKit also defines the following attributes.
// See bugs 1176970 and 1176983.
// - NSAccessibilityMathFencedOpenAttribute @"AXMathFencedOpen"
// - NSAccessibilityMathFencedCloseAttribute @"AXMathFencedClose"
// - NSAccessibilityMathPrescriptsAttribute @"AXMathPrescripts"
// - NSAccessibilityMathPostscriptsAttribute @"AXMathPostscripts"
// returns the passed in object if it is not ignored. if it's ignored, will return
// the first unignored ancestor.
static inline id
GetClosestInterestingAccessible(id anObject)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
// this object is not ignored, so let's return it.
if (![anObject accessibilityIsIgnored])
return GetObjectOrRepresentedView(anObject);
// find the closest ancestor that is not ignored.
id unignoredObject = anObject;
while ((unignoredObject = [unignoredObject accessibilityAttributeValue:NSAccessibilityParentAttribute])) {
if (![unignoredObject accessibilityIsIgnored])
// object is not ignored, so let's stop the search.
break;
}
// if it's a mozAccessible, we need to take care to maybe return the view we
// represent, to the AT.
if ([unignoredObject respondsToSelector:@selector(hasRepresentedView)])
return GetObjectOrRepresentedView(unignoredObject);
return unignoredObject;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
ProxyAccessible*
a11y::GetProxyUnignoredParent(const ProxyAccessible* aProxy)
{
ProxyAccessible* parent = aProxy->Parent();
while (parent && IsProxyIgnored(aProxy))
parent = parent->Parent();
return parent;
}
void
a11y::GetProxyUnignoredChildren(const ProxyAccessible* aProxy,
nsTArray<ProxyAccessible*>* aChildrenArray)
{
if (aProxy->MustPruneChildren())
return;
uint32_t childCount = aProxy->ChildrenCount();
for (size_t childIdx = 0; childIdx < childCount; childIdx++) {
ProxyAccessible* childProxy = aProxy->ChildAt(childIdx);
// If element is ignored, then add its children as substitutes.
if (IsProxyIgnored(childProxy)) {
GetProxyUnignoredChildren(aProxy, aChildrenArray);
continue;
}
aChildrenArray->AppendElement(childProxy);
}
}
BOOL
a11y::IsProxyIgnored(const ProxyAccessible* aProxy)
{
mozAccessible* nativeObject = GetNativeFromProxy(aProxy);
if (!nativeObject)
return true;
return [nativeObject accessibilityIsIgnored];
}
// convert an array of Gecko accessibles to an NSArray of native accessibles
static inline NSMutableArray*
ConvertToNSArray(nsTArray<Accessible*>& aArray)
{
NSMutableArray* nativeArray = [[NSMutableArray alloc] init];
// iterate through the list, and get each native accessible.
size_t totalCount = aArray.Length();
for (size_t i = 0; i < totalCount; i++) {
Accessible* curAccessible = aArray.ElementAt(i);
mozAccessible* curNative = GetNativeFromGeckoAccessible(curAccessible);
if (curNative)
[nativeArray addObject:GetObjectOrRepresentedView(curNative)];
}
return nativeArray;
}
// convert an array of Gecko proxy accessibles to an NSArray of native accessibles
static inline NSMutableArray*
ConvertToNSArray(nsTArray<ProxyAccessible*>& aArray)
{
NSMutableArray* nativeArray = [[NSMutableArray alloc] init];
// iterate through the list, and get each native accessible.
size_t totalCount = aArray.Length();
for (size_t i = 0; i < totalCount; i++) {
ProxyAccessible* curAccessible = aArray.ElementAt(i);
mozAccessible* curNative = GetNativeFromProxy(curAccessible);
if (curNative)
[nativeArray addObject:GetObjectOrRepresentedView(curNative)];
}
return nativeArray;
}
#pragma mark -
@implementation mozAccessible
- (id)initWithAccessible:(uintptr_t)aGeckoAccessible
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ((self = [super init])) {
mGeckoAccessible = aGeckoAccessible;
if (aGeckoAccessible & IS_PROXY)
mRole = [self getProxyAccessible]->Role();
else
mRole = [self getGeckoAccessible]->Role();
}
return self;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (void)dealloc
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
[mChildren release];
[super dealloc];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
- (mozilla::a11y::AccessibleWrap*)getGeckoAccessible
{
// Check if mGeckoAccessible points at a proxy
if (mGeckoAccessible & IS_PROXY)
return nil;
return reinterpret_cast<AccessibleWrap*>(mGeckoAccessible);
}
- (mozilla::a11y::ProxyAccessible*)getProxyAccessible
{
// Check if mGeckoAccessible points at a proxy
if (!(mGeckoAccessible & IS_PROXY))
return nil;
return reinterpret_cast<ProxyAccessible*>(mGeckoAccessible & ~IS_PROXY);
}
#pragma mark -
- (BOOL)accessibilityIsIgnored
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
// unknown (either unimplemented, or irrelevant) elements are marked as ignored
// as well as expired elements.
bool noRole = [[self role] isEqualToString:NSAccessibilityUnknownRole];
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
return (noRole && !(accWrap->InteractiveState() & states::FOCUSABLE));
if (ProxyAccessible* proxy = [self getProxyAccessible])
return (noRole && !(proxy->State() & states::FOCUSABLE));
return true;
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}
- (NSArray*)additionalAccessibilityAttributeNames
{
NSMutableArray* additional = [NSMutableArray array];
switch (mRole) {
case roles::MATHML_ROOT:
[additional addObject:NSAccessibilityMathRootIndexAttribute];
[additional addObject:NSAccessibilityMathRootRadicandAttribute];
break;
case roles::MATHML_SQUARE_ROOT:
[additional addObject:NSAccessibilityMathRootRadicandAttribute];
break;
case roles::MATHML_FRACTION:
[additional addObject:NSAccessibilityMathFractionNumeratorAttribute];
[additional addObject:NSAccessibilityMathFractionDenominatorAttribute];
[additional addObject:NSAccessibilityMathLineThicknessAttribute];
break;
case roles::MATHML_SUB:
case roles::MATHML_SUP:
case roles::MATHML_SUB_SUP:
[additional addObject:NSAccessibilityMathBaseAttribute];
[additional addObject:NSAccessibilityMathSubscriptAttribute];
[additional addObject:NSAccessibilityMathSuperscriptAttribute];
break;
case roles::MATHML_UNDER:
case roles::MATHML_OVER:
case roles::MATHML_UNDER_OVER:
[additional addObject:NSAccessibilityMathBaseAttribute];
[additional addObject:NSAccessibilityMathUnderAttribute];
[additional addObject:NSAccessibilityMathOverAttribute];
break;
// XXX bug 1176983
// roles::MATHML_MULTISCRIPTS should also have the following attributes:
// - NSAccessibilityMathPrescriptsAttribute
// - NSAccessibilityMathPostscriptsAttribute
// XXX bug 1176970
// roles::MATHML_FENCED should also have the following attributes:
// - NSAccessibilityMathFencedOpenAttribute
// - NSAccessibilityMathFencedCloseAttribute
default:
break;
}
return additional;
}
- (NSArray*)accessibilityAttributeNames
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
// if we're expired, we don't support any attributes.
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
if (!accWrap && !proxy)
return [NSArray array];
static NSArray* generalAttributes = nil;
static NSArray* tableAttrs = nil;
static NSArray* tableRowAttrs = nil;
static NSArray* tableCellAttrs = nil;
NSMutableArray* tempArray = nil;
if (!generalAttributes) {
// standard attributes that are shared and supported by all generic elements.
generalAttributes = [[NSArray alloc] initWithObjects: NSAccessibilityChildrenAttribute,
NSAccessibilityParentAttribute,
NSAccessibilityRoleAttribute,
NSAccessibilityTitleAttribute,
NSAccessibilityValueAttribute,
NSAccessibilitySubroleAttribute,
NSAccessibilityRoleDescriptionAttribute,
NSAccessibilityPositionAttribute,
NSAccessibilityEnabledAttribute,
NSAccessibilitySizeAttribute,
NSAccessibilityWindowAttribute,
NSAccessibilityFocusedAttribute,
NSAccessibilityHelpAttribute,
NSAccessibilityTitleUIElementAttribute,
NSAccessibilityTopLevelUIElementAttribute,
#if DEBUG
@"AXMozDescription",
#endif
nil];
}
if (!tableAttrs) {
tempArray = [[NSMutableArray alloc] initWithArray:generalAttributes];
[tempArray addObject:NSAccessibilityRowCountAttribute];
[tempArray addObject:NSAccessibilityColumnCountAttribute];
[tempArray addObject:NSAccessibilityRowsAttribute];
tableAttrs = [[NSArray alloc] initWithArray:tempArray];
[tempArray release];
}
if (!tableRowAttrs) {
tempArray = [[NSMutableArray alloc] initWithArray:generalAttributes];
[tempArray addObject:NSAccessibilityIndexAttribute];
tableRowAttrs = [[NSArray alloc] initWithArray:tempArray];
[tempArray release];
}
if (!tableCellAttrs) {
tempArray = [[NSMutableArray alloc] initWithArray:generalAttributes];
[tempArray addObject:NSAccessibilityRowIndexRangeAttribute];
[tempArray addObject:NSAccessibilityColumnIndexRangeAttribute];
[tempArray addObject:NSAccessibilityRowHeaderUIElementsAttribute];
[tempArray addObject:NSAccessibilityColumnHeaderUIElementsAttribute];
tableCellAttrs = [[NSArray alloc] initWithArray:tempArray];
[tempArray release];
}
NSArray* objectAttributes = generalAttributes;
if ((accWrap && accWrap->IsTable()) || (proxy && proxy->IsTable()))
objectAttributes = tableAttrs;
else if ((accWrap && accWrap->IsTableRow()) || (proxy && proxy->IsTableRow()))
objectAttributes = tableRowAttrs;
else if ((accWrap && accWrap->IsTableCell()) || (proxy && proxy->IsTableCell()))
objectAttributes = tableCellAttrs;
NSArray* additionalAttributes = [self additionalAccessibilityAttributeNames];
if ([additionalAttributes count])
objectAttributes = [objectAttributes arrayByAddingObjectsFromArray:additionalAttributes];
return objectAttributes;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (id)childAt:(uint32_t)i
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if (AccessibleWrap* accWrap = [self getGeckoAccessible]) {
Accessible* child = accWrap->GetChildAt(i);
return child ? GetNativeFromGeckoAccessible(child) : nil;
} else if (ProxyAccessible* proxy = [self getProxyAccessible]) {
ProxyAccessible* child = proxy->ChildAt(i);
return child ? GetNativeFromProxy(child) : nil;
}
return nil;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (id)accessibilityAttributeValue:(NSString*)attribute
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
if (!accWrap && !proxy)
return nil;
#if DEBUG
if ([attribute isEqualToString:@"AXMozDescription"])
return [NSString stringWithFormat:@"role = %u native = %@", mRole, [self class]];
#endif
if ([attribute isEqualToString:NSAccessibilityChildrenAttribute])
return [self children];
if ([attribute isEqualToString:NSAccessibilityParentAttribute])
return [self parent];
#ifdef DEBUG_hakan
NSLog (@"(%@ responding to attr %@)", self, attribute);
#endif
if ([attribute isEqualToString:NSAccessibilityRoleAttribute])
return [self role];
if ([attribute isEqualToString:NSAccessibilityPositionAttribute])
return [self position];
if ([attribute isEqualToString:NSAccessibilitySubroleAttribute])
return [self subrole];
if ([attribute isEqualToString:NSAccessibilityEnabledAttribute])
return [NSNumber numberWithBool:[self isEnabled]];
if ([attribute isEqualToString:NSAccessibilityValueAttribute])
return [self value];
if ([attribute isEqualToString:NSAccessibilityRoleDescriptionAttribute])
return [self roleDescription];
if ([attribute isEqualToString:NSAccessibilityFocusedAttribute])
return [NSNumber numberWithBool:[self isFocused]];
if ([attribute isEqualToString:NSAccessibilitySizeAttribute])
return [self size];
if ([attribute isEqualToString:NSAccessibilityWindowAttribute])
return [self window];
if ([attribute isEqualToString:NSAccessibilityTopLevelUIElementAttribute])
return [self window];
if ([attribute isEqualToString:NSAccessibilityTitleAttribute])
return [self title];
if ([attribute isEqualToString:NSAccessibilityTitleUIElementAttribute]) {
if (accWrap) {
Relation rel = accWrap->RelationByType(RelationType::LABELLED_BY);
Accessible* tempAcc = rel.Next();
return tempAcc ? GetNativeFromGeckoAccessible(tempAcc) : nil;
}
nsTArray<ProxyAccessible*> rel = proxy->RelationByType(RelationType::LABELLED_BY);
ProxyAccessible* tempProxy = rel.SafeElementAt(0);
return tempProxy ? GetNativeFromProxy(tempProxy) : nil;
}
if ([attribute isEqualToString:NSAccessibilityHelpAttribute])
return [self help];
if (accWrap) {
if (accWrap->IsTable()) {
TableAccessible* table = accWrap->AsTable();
if ([attribute isEqualToString:NSAccessibilityRowCountAttribute])
return @(table->RowCount());
if ([attribute isEqualToString:NSAccessibilityColumnCountAttribute])
return @(table->ColCount());
if ([attribute isEqualToString:NSAccessibilityRowsAttribute]) {
// Create a new array with the list of table rows.
NSMutableArray* nativeArray = [[NSMutableArray alloc] init];
uint32_t totalCount = accWrap->ChildCount();
for (uint32_t i = 0; i < totalCount; i++) {
if (accWrap->GetChildAt(i)->IsTableRow()) {
mozAccessible* curNative =
GetNativeFromGeckoAccessible(accWrap->GetChildAt(i));
if (curNative)
[nativeArray addObject:GetObjectOrRepresentedView(curNative)];
}
}
return nativeArray;
}
} else if (accWrap->IsTableRow()) {
if ([attribute isEqualToString:NSAccessibilityIndexAttribute]) {
// Count the number of rows before that one to obtain the row index.
uint32_t index = 0;
Accessible* parent = accWrap->Parent();
if (parent) {
for (int32_t i = accWrap->IndexInParent() - 1; i >= 0; i--) {
if (parent->GetChildAt(i)->IsTableRow()) {
index++;
}
}
}
return [NSNumber numberWithUnsignedInteger:index];
}
} else if (accWrap->IsTableCell()) {
TableCellAccessible* cell = accWrap->AsTableCell();
if ([attribute isEqualToString:NSAccessibilityRowIndexRangeAttribute])
return [NSValue valueWithRange:NSMakeRange(cell->RowIdx(),
cell->RowExtent())];
if ([attribute isEqualToString:NSAccessibilityColumnIndexRangeAttribute])
return [NSValue valueWithRange:NSMakeRange(cell->ColIdx(),
cell->ColExtent())];
if ([attribute isEqualToString:NSAccessibilityRowHeaderUIElementsAttribute]) {
nsAutoTArray<Accessible*, 10> headerCells;
cell->RowHeaderCells(&headerCells);
return ConvertToNSArray(headerCells);
}
if ([attribute isEqualToString:NSAccessibilityColumnHeaderUIElementsAttribute]) {
nsAutoTArray<Accessible*, 10> headerCells;
cell->ColHeaderCells(&headerCells);
return ConvertToNSArray(headerCells);
}
}
} else if (proxy) {
if (proxy->IsTable()) {
if ([attribute isEqualToString:NSAccessibilityRowCountAttribute])
return @(proxy->TableRowCount());
if ([attribute isEqualToString:NSAccessibilityColumnCountAttribute])
return @(proxy->TableColumnCount());
if ([attribute isEqualToString:NSAccessibilityRowsAttribute]) {
// Create a new array with the list of table rows.
NSMutableArray* nativeArray = [[NSMutableArray alloc] init];
uint32_t totalCount = proxy->ChildrenCount();
for (uint32_t i = 0; i < totalCount; i++) {
if (proxy->ChildAt(i)->IsTableRow()) {
mozAccessible* curNative =
GetNativeFromProxy(proxy->ChildAt(i));
if (curNative)
[nativeArray addObject:GetObjectOrRepresentedView(curNative)];
}
}
return nativeArray;
}
} else if (proxy->IsTableRow()) {
if ([attribute isEqualToString:NSAccessibilityIndexAttribute]) {
// Count the number of rows before that one to obtain the row index.
uint32_t index = 0;
ProxyAccessible* parent = proxy->Parent();
if (parent) {
for (int32_t i = proxy->IndexInParent() - 1; i >= 0; i--) {
if (parent->ChildAt(i)->IsTableRow()) {
index++;
}
}
}
return [NSNumber numberWithUnsignedInteger:index];
}
} else if (proxy->IsTableCell()) {
if ([attribute isEqualToString:NSAccessibilityRowIndexRangeAttribute])
return [NSValue valueWithRange:NSMakeRange(proxy->RowIdx(),
proxy->RowExtent())];
if ([attribute isEqualToString:NSAccessibilityColumnIndexRangeAttribute])
return [NSValue valueWithRange:NSMakeRange(proxy->ColIdx(),
proxy->ColExtent())];
if ([attribute isEqualToString:NSAccessibilityRowHeaderUIElementsAttribute]) {
nsTArray<ProxyAccessible*> headerCells;
proxy->RowHeaderCells(&headerCells);
return ConvertToNSArray(headerCells);
}
if ([attribute isEqualToString:NSAccessibilityColumnHeaderUIElementsAttribute]) {
nsTArray<ProxyAccessible*> headerCells;
proxy->ColHeaderCells(&headerCells);
return ConvertToNSArray(headerCells);
}
}
}
switch (mRole) {
case roles::MATHML_ROOT:
if ([attribute isEqualToString:NSAccessibilityMathRootRadicandAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathRootIndexAttribute])
return [self childAt:1];
break;
case roles::MATHML_SQUARE_ROOT:
if ([attribute isEqualToString:NSAccessibilityMathRootRadicandAttribute])
return [self childAt:0];
break;
case roles::MATHML_FRACTION:
if ([attribute isEqualToString:NSAccessibilityMathFractionNumeratorAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathFractionDenominatorAttribute])
return [self childAt:1];
if ([attribute isEqualToString:NSAccessibilityMathLineThicknessAttribute]) {
// WebKit sets line thickness to some logical value parsed in the
// renderer object of the <mfrac> element. It's not clear whether the
// exact value is relevant to assistive technologies. From a semantic
// point of view, the only important point is to distinguish between
// <mfrac> elements that have a fraction bar and those that do not.
// Per the MathML 3 spec, the latter happens iff the linethickness
// attribute is of the form [zero-float][optional-unit]. In that case we
// set line thickness to zero and in the other cases we set it to one.
nsAutoString thickness;
if (accWrap) {
nsCOMPtr<nsIPersistentProperties> attributes = accWrap->Attributes();
nsAccUtils::GetAccAttr(attributes, nsGkAtoms::linethickness_, thickness);
} else {
nsAutoTArray<Attribute, 10> attrs;
proxy->Attributes(&attrs);
for (size_t i = 0 ; i < attrs.Length() ; i++) {
if (attrs.ElementAt(i).Name() == "thickness") {
thickness = attrs.ElementAt(i).Value();
break;
}
}
}
double value = 1.0;
if (!thickness.IsEmpty())
value = PR_strtod(NS_LossyConvertUTF16toASCII(thickness).get(),
nullptr);
return [NSNumber numberWithInteger:(value ? 1 : 0)];
}
break;
case roles::MATHML_SUB:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathSubscriptAttribute])
return [self childAt:1];
#ifdef DEBUG
if ([attribute isEqualToString:NSAccessibilityMathSuperscriptAttribute])
return nil;
#endif
break;
case roles::MATHML_SUP:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
#ifdef DEBUG
if ([attribute isEqualToString:NSAccessibilityMathSubscriptAttribute])
return nil;
#endif
if ([attribute isEqualToString:NSAccessibilityMathSuperscriptAttribute])
return [self childAt:1];
break;
case roles::MATHML_SUB_SUP:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathSubscriptAttribute])
return [self childAt:1];
if ([attribute isEqualToString:NSAccessibilityMathSuperscriptAttribute])
return [self childAt:2];
break;
case roles::MATHML_UNDER:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathUnderAttribute])
return [self childAt:1];
#ifdef DEBUG
if ([attribute isEqualToString:NSAccessibilityMathOverAttribute])
return nil;
#endif
break;
case roles::MATHML_OVER:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
#ifdef DEBUG
if ([attribute isEqualToString:NSAccessibilityMathUnderAttribute])
return nil;
#endif
if ([attribute isEqualToString:NSAccessibilityMathOverAttribute])
return [self childAt:1];
break;
case roles::MATHML_UNDER_OVER:
if ([attribute isEqualToString:NSAccessibilityMathBaseAttribute])
return [self childAt:0];
if ([attribute isEqualToString:NSAccessibilityMathUnderAttribute])
return [self childAt:1];
if ([attribute isEqualToString:NSAccessibilityMathOverAttribute])
return [self childAt:2];
break;
// XXX bug 1176983
// roles::MATHML_MULTISCRIPTS should also have the following attributes:
// - NSAccessibilityMathPrescriptsAttribute
// - NSAccessibilityMathPostscriptsAttribute
// XXX bug 1176970
// roles::MATHML_FENCED should also have the following attributes:
// - NSAccessibilityMathFencedOpenAttribute
// - NSAccessibilityMathFencedCloseAttribute
default:
break;
}
#ifdef DEBUG
NSLog (@"!!! %@ can't respond to attribute %@", self, attribute);
#endif
return nil;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (BOOL)accessibilityIsAttributeSettable:(NSString*)attribute
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
if ([attribute isEqualToString:NSAccessibilityFocusedAttribute])
return [self canBeFocused];
return NO;
NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
}
- (void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
#ifdef DEBUG_hakan
NSLog (@"[%@] %@='%@'", self, attribute, value);
#endif
// we only support focusing elements so far.
if ([attribute isEqualToString:NSAccessibilityFocusedAttribute] && [value boolValue])
[self focus];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
- (id)accessibilityHitTest:(NSPoint)point
{
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
if (!accWrap && !proxy)
return nil;
// Convert the given screen-global point in the cocoa coordinate system (with
// origin in the bottom-left corner of the screen) into point in the Gecko
// coordinate system (with origin in a top-left screen point).
NSScreen* mainView = [[NSScreen screens] objectAtIndex:0];
NSPoint tmpPoint = NSMakePoint(point.x,
[mainView frame].size.height - point.y);
nsIntPoint geckoPoint = nsCocoaUtils::
CocoaPointsToDevPixels(tmpPoint, nsCocoaUtils::GetBackingScaleFactor(mainView));
mozAccessible* nativeChild = nil;
if (accWrap) {
Accessible* child = accWrap->ChildAtPoint(geckoPoint.x, geckoPoint.y,
Accessible::eDeepestChild);
if (child)
nativeChild = GetNativeFromGeckoAccessible(child);
} else if (proxy) {
ProxyAccessible* child = proxy->ChildAtPoint(geckoPoint.x, geckoPoint.y,
Accessible::eDeepestChild);
if (child)
nativeChild = GetNativeFromProxy(child);
}
if (nativeChild)
return GetClosestInterestingAccessible(nativeChild);
// if we didn't find anything, return ourself (or the first unignored ancestor).
return GetClosestInterestingAccessible(self);
}
- (NSArray*)accessibilityActionNames
{
return nil;
}
- (NSString*)accessibilityActionDescription:(NSString*)action
{
// by default we return whatever the MacOS API know about.
// if you have custom actions, override.
return NSAccessibilityActionDescription(action);
}
- (void)accessibilityPerformAction:(NSString*)action
{
}
- (id)accessibilityFocusedUIElement
{
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
if (!accWrap && !proxy)
return nil;
mozAccessible* focusedChild = nil;
if (accWrap) {
Accessible* focusedGeckoChild = accWrap->FocusedChild();
if (focusedGeckoChild)
focusedChild = GetNativeFromGeckoAccessible(focusedGeckoChild);
} else if (proxy) {
ProxyAccessible* focusedGeckoChild = proxy->FocusedChild();
if (focusedGeckoChild)
focusedChild = GetNativeFromProxy(focusedGeckoChild);
}
if (focusedChild)
return GetClosestInterestingAccessible(focusedChild);
// return ourself if we can't get a native focused child.
return GetClosestInterestingAccessible(self);
}
#pragma mark -
- (id <mozAccessible>)parent
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
id nativeParent = nil;
if (AccessibleWrap* accWrap = [self getGeckoAccessible]) {
Accessible* accessibleParent = accWrap->GetUnignoredParent();
if (accessibleParent)
nativeParent = GetNativeFromGeckoAccessible(accessibleParent);
if (nativeParent)
return GetClosestInterestingAccessible(nativeParent);
// GetUnignoredParent() returns null when there is no unignored accessible all the way up to
// the root accessible. so we'll have to return whatever native accessible is above our root accessible
// (which might be the owning NSWindow in the application, for example).
//
// get the native root accessible, and tell it to return its first parent unignored accessible.
nativeParent = GetNativeFromGeckoAccessible(accWrap->RootAccessible());
} else if (ProxyAccessible* proxy = [self getProxyAccessible]) {
// Go up the chain to find a parent that is not ignored.
ProxyAccessible* accessibleParent = GetProxyUnignoredParent(proxy);
if (accessibleParent)
nativeParent = GetNativeFromProxy(accessibleParent);
if (nativeParent)
return GetClosestInterestingAccessible(nativeParent);
Accessible* outerDoc = proxy->OuterDocOfRemoteBrowser();
nativeParent = outerDoc ?
GetNativeFromGeckoAccessible(outerDoc->RootAccessible()) : nil;
} else {
return nil;
}
NSAssert1 (nativeParent, @"!!! we can't find a parent for %@", self);
return GetClosestInterestingAccessible(nativeParent);
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (BOOL)hasRepresentedView
{
return NO;
}
- (id)representedView
{
return nil;
}
- (BOOL)isRoot
{
return NO;
}
// gets our native children lazily.
// returns nil when there are no children.
- (NSArray*)children
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
AccessibleWrap* accWrap = [self getGeckoAccessible];
if (mChildren || (accWrap && !accWrap->AreChildrenCached()))
return mChildren;
// get the array of children.
if (accWrap) {
nsAutoTArray<Accessible*, 10> childrenArray;
accWrap->GetUnignoredChildren(&childrenArray);
mChildren = ConvertToNSArray(childrenArray);
} else if (ProxyAccessible* proxy = [self getProxyAccessible]) {
nsAutoTArray<ProxyAccessible*, 10> childrenArray;
GetProxyUnignoredChildren(proxy, &childrenArray);
mChildren = ConvertToNSArray(childrenArray);
}
#ifdef DEBUG_hakan
// make sure we're not returning any ignored accessibles.
NSEnumerator *e = [mChildren objectEnumerator];
mozAccessible *m = nil;
while ((m = [e nextObject])) {
NSAssert1(![m accessibilityIsIgnored], @"we should never return an ignored accessible! (%@)", m);
}
#endif
return mChildren;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (NSValue*)position
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
nsIntRect rect;
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
rect = accWrap->Bounds();
else if (ProxyAccessible* proxy = [self getProxyAccessible])
rect = proxy->Bounds();
else
return nil;
NSScreen* mainView = [[NSScreen screens] objectAtIndex:0];
CGFloat scaleFactor = nsCocoaUtils::GetBackingScaleFactor(mainView);
NSPoint p = NSMakePoint(static_cast<CGFloat>(rect.x) / scaleFactor,
[mainView frame].size.height - static_cast<CGFloat>(rect.y + rect.height) / scaleFactor);
return [NSValue valueWithPoint:p];
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (NSValue*)size
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
nsIntRect rect;
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
rect = accWrap->Bounds();
else if (ProxyAccessible* proxy = [self getProxyAccessible])
rect = proxy->Bounds();
else
return nil;
CGFloat scaleFactor =
nsCocoaUtils::GetBackingScaleFactor([[NSScreen screens] objectAtIndex:0]);
return [NSValue valueWithSize:NSMakeSize(static_cast<CGFloat>(rect.width) / scaleFactor,
static_cast<CGFloat>(rect.height) / scaleFactor)];
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (NSString*)role
{
AccessibleWrap* accWrap = [self getGeckoAccessible];
if (accWrap) {
#ifdef DEBUG_A11Y
NS_ASSERTION(nsAccUtils::IsTextInterfaceSupportCorrect(accWrap),
"Does not support Text when it should");
#endif
} else if (![self getProxyAccessible]) {
return nil;
}
#define ROLE(geckoRole, stringRole, atkRole, macRole, msaaRole, ia2Role, nameRule) \
case roles::geckoRole: \
return macRole;
switch (mRole) {
#include "RoleMap.h"
default:
NS_NOTREACHED("Unknown role.");
return NSAccessibilityUnknownRole;
}
#undef ROLE
}
- (NSString*)subrole
{
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
// Deal with landmarks first
nsIAtom* landmark = nullptr;
if (accWrap)
landmark = accWrap->LandmarkRole();
else if (proxy)
landmark = proxy->LandmarkRole();
if (landmark) {
if (landmark == nsGkAtoms::application)
return @"AXLandmarkApplication";
if (landmark == nsGkAtoms::banner)
return @"AXLandmarkBanner";
if (landmark == nsGkAtoms::complementary)
return @"AXLandmarkComplementary";
if (landmark == nsGkAtoms::contentinfo)
return @"AXLandmarkContentInfo";
if (landmark == nsGkAtoms::form)
return @"AXLandmarkForm";
if (landmark == nsGkAtoms::main)
return @"AXLandmarkMain";
if (landmark == nsGkAtoms::navigation)
return @"AXLandmarkNavigation";
if (landmark == nsGkAtoms::search)
return @"AXLandmarkSearch";
if (landmark == nsGkAtoms::searchbox)
return @"AXSearchField";
}
// Now, deal with widget roles
nsIAtom* roleAtom = nullptr;
if (accWrap && accWrap->HasARIARole()) {
nsRoleMapEntry* roleMap = accWrap->ARIARoleMap();
roleAtom = *roleMap->roleAtom;
}
if (proxy)
roleAtom = proxy->ARIARoleAtom();
if (roleAtom) {
if (roleAtom == nsGkAtoms::alert)
return @"AXApplicationAlert";
if (roleAtom == nsGkAtoms::alertdialog)
return @"AXApplicationAlertDialog";
if (roleAtom == nsGkAtoms::article)
return @"AXDocumentArticle";
if (roleAtom == nsGkAtoms::dialog)
return @"AXApplicationDialog";
if (roleAtom == nsGkAtoms::document)
return @"AXDocument";
if (roleAtom == nsGkAtoms::log_)
return @"AXApplicationLog";
if (roleAtom == nsGkAtoms::marquee)
return @"AXApplicationMarquee";
if (roleAtom == nsGkAtoms::math)
return @"AXDocumentMath";
if (roleAtom == nsGkAtoms::note_)
return @"AXDocumentNote";
if (roleAtom == nsGkAtoms::region)
return @"AXDocumentRegion";
if (roleAtom == nsGkAtoms::status)
return @"AXApplicationStatus";
if (roleAtom == nsGkAtoms::tabpanel)
return @"AXTabPanel";
if (roleAtom == nsGkAtoms::timer)
return @"AXApplicationTimer";
if (roleAtom == nsGkAtoms::tooltip)
return @"AXUserInterfaceTooltip";
}
switch (mRole) {
case roles::LIST:
return @"AXContentList"; // 10.6+ NSAccessibilityContentListSubrole;
case roles::ENTRY:
if ((accWrap && accWrap->IsSearchbox()) ||
(proxy && proxy->IsSearchbox()))