gecko-dev/accessible/mac/mozActionElements.mm

341 строка
8.9 KiB
Plaintext

/* -*- 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 "mozActionElements.h"
#import "MacUtils.h"
#include "Accessible-inl.h"
#include "DocAccessible.h"
#include "XULTabAccessible.h"
#include "nsDeckFrame.h"
#include "nsObjCExceptions.h"
using namespace mozilla::a11y;
enum CheckboxValue {
// these constants correspond to the values in the OS
kUnchecked = 0,
kChecked = 1,
kMixed = 2
};
@implementation mozButtonAccessible
- (NSArray*)accessibilityAttributeNames
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
static NSArray *attributes = nil;
if (!attributes) {
attributes = [[NSArray alloc] initWithObjects:NSAccessibilityParentAttribute, // required
NSAccessibilityRoleAttribute, // required
NSAccessibilityRoleDescriptionAttribute,
NSAccessibilityPositionAttribute, // required
NSAccessibilitySizeAttribute, // required
NSAccessibilityWindowAttribute, // required
NSAccessibilityPositionAttribute, // required
NSAccessibilityTopLevelUIElementAttribute, // required
NSAccessibilityHelpAttribute,
NSAccessibilityEnabledAttribute, // required
NSAccessibilityFocusedAttribute, // required
NSAccessibilityTitleAttribute, // required
NSAccessibilityChildrenAttribute,
NSAccessibilityDescriptionAttribute,
#if DEBUG
@"AXMozDescription",
#endif
nil];
}
return attributes;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (id)accessibilityAttributeValue:(NSString *)attribute
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ([attribute isEqualToString:NSAccessibilityChildrenAttribute]) {
if ([self hasPopup])
return [self children];
return nil;
}
if ([attribute isEqualToString:NSAccessibilityRoleDescriptionAttribute]) {
if ([self isTab])
return utils::LocalizedString(NS_LITERAL_STRING("tab"));
return NSAccessibilityRoleDescription([self role], nil);
}
return [super accessibilityAttributeValue:attribute];
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (BOOL)accessibilityIsIgnored
{
return ![self getGeckoAccessible] && ![self getProxyAccessible];
}
- (NSArray*)accessibilityActionNames
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ([self isEnabled]) {
if ([self hasPopup])
return [NSArray arrayWithObjects:NSAccessibilityPressAction,
NSAccessibilityShowMenuAction,
nil];
return [NSArray arrayWithObject:NSAccessibilityPressAction];
}
return nil;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (NSString*)accessibilityActionDescription:(NSString*)action
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ([action isEqualToString:NSAccessibilityPressAction]) {
if ([self isTab])
return utils::LocalizedString(NS_LITERAL_STRING("switch"));
return @"press button"; // XXX: localize this later?
}
if ([self hasPopup]) {
if ([action isEqualToString:NSAccessibilityShowMenuAction])
return @"show menu";
}
return nil;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (void)accessibilityPerformAction:(NSString*)action
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
if ([self isEnabled] && [action isEqualToString:NSAccessibilityPressAction]) {
// TODO: this should bring up the menu, but currently doesn't.
// once msaa and atk have merged better, they will implement
// the action needed to show the menu.
[self click];
}
NS_OBJC_END_TRY_ABORT_BLOCK;
}
- (void)click
{
// both buttons and checkboxes have only one action. we should really stop using arbitrary
// arrays with actions, and define constants for these actions.
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
accWrap->DoAction(0);
else if (ProxyAccessible* proxy = [self getProxyAccessible])
proxy->DoAction(0);
}
- (BOOL)isTab
{
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
return accWrap->Role() == roles::PAGETAB;
if (ProxyAccessible* proxy = [self getProxyAccessible])
return proxy->Role() == roles::PAGETAB;
return false;
}
- (BOOL)hasPopup
{
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
return accWrap->NativeState() & states::HASPOPUP;
if (ProxyAccessible* proxy = [self getProxyAccessible])
return proxy->NativeState() & states::HASPOPUP;
return false;
}
@end
@implementation mozCheckboxAccessible
- (NSString*)accessibilityActionDescription:(NSString*)action
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ([action isEqualToString:NSAccessibilityPressAction]) {
if ([self isChecked] != kUnchecked)
return @"uncheck checkbox"; // XXX: localize this later?
return @"check checkbox"; // XXX: localize this later?
}
return nil;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (int)isChecked
{
uint64_t state = 0;
if (AccessibleWrap* accWrap = [self getGeckoAccessible])
state = accWrap->NativeState();
else if (ProxyAccessible* proxy = [self getProxyAccessible])
state = proxy->NativeState();
// check if we're checked or in a mixed state
if (state & states::CHECKED) {
return (state & states::MIXED) ? kMixed : kChecked;
}
return kUnchecked;
}
- (id)value
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
return [NSNumber numberWithInt:[self isChecked]];
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
@end
@implementation mozTabsAccessible
- (void)dealloc
{
[mTabs release];
[super dealloc];
}
- (NSArray*)accessibilityAttributeNames
{
// standard attributes that are shared and supported by root accessible (AXMain) elements.
static NSMutableArray* attributes = nil;
if (!attributes) {
attributes = [[super accessibilityAttributeNames] mutableCopy];
[attributes addObject:NSAccessibilityContentsAttribute];
[attributes addObject:NSAccessibilityTabsAttribute];
}
return attributes;
}
- (id)accessibilityAttributeValue:(NSString *)attribute
{
if ([attribute isEqualToString:NSAccessibilityContentsAttribute])
return [super children];
if ([attribute isEqualToString:NSAccessibilityTabsAttribute])
return [self tabs];
return [super accessibilityAttributeValue:attribute];
}
/**
* Returns the selected tab (the mozAccessible)
*/
- (id)value
{
mozAccessible* nativeAcc = nil;
if (AccessibleWrap* accWrap = [self getGeckoAccessible]) {
if (Accessible* accTab = accWrap->GetSelectedItem(0)) {
accTab->GetNativeInterface((void**)&nativeAcc);
}
} else if (ProxyAccessible* proxy = [self getProxyAccessible]) {
if (ProxyAccessible* proxyTab = proxy->GetSelectedItem(0)) {
nativeAcc = GetNativeFromProxy(proxyTab);
}
}
return nativeAcc;
}
/**
* Return the mozAccessibles that are the tabs.
*/
- (id)tabs
{
if (mTabs)
return mTabs;
NSArray* children = [self children];
NSEnumerator* enumerator = [children objectEnumerator];
mTabs = [[NSMutableArray alloc] init];
id obj;
while ((obj = [enumerator nextObject]))
if ([obj isTab])
[mTabs addObject:obj];
return mTabs;
}
- (void)invalidateChildren
{
[super invalidateChildren];
[mTabs release];
mTabs = nil;
}
@end
@implementation mozPaneAccessible
- (NSUInteger)accessibilityArrayAttributeCount:(NSString*)attribute
{
AccessibleWrap* accWrap = [self getGeckoAccessible];
ProxyAccessible* proxy = [self getProxyAccessible];
if (!accWrap && !proxy)
return 0;
// By default this calls -[[mozAccessible children] count].
// Since we don't cache mChildren. This is faster.
if ([attribute isEqualToString:NSAccessibilityChildrenAttribute]) {
if (accWrap)
return accWrap->ChildCount() ? 1 : 0;
return proxy->ChildrenCount() ? 1 : 0;
}
return [super accessibilityArrayAttributeCount:attribute];
}
- (NSArray*)children
{
if (![self getGeckoAccessible])
return nil;
nsDeckFrame* deckFrame = do_QueryFrame([self getGeckoAccessible]->GetFrame());
nsIFrame* selectedFrame = deckFrame ? deckFrame->GetSelectedBox() : nullptr;
Accessible* selectedAcc = nullptr;
if (selectedFrame) {
nsINode* node = selectedFrame->GetContent();
selectedAcc = [self getGeckoAccessible]->Document()->GetAccessible(node);
}
if (selectedAcc) {
mozAccessible *curNative = GetNativeFromGeckoAccessible(selectedAcc);
if (curNative)
return [NSArray arrayWithObjects:GetObjectOrRepresentedView(curNative), nil];
}
return nil;
}
@end