94dd068e15
In the linked issue we were discussing that Electron apps are inaccessible unless VoiceOver is enabled. While it's a working solution for users with vision impairment, all other users and apps that require accessibility can't interact with Electron-based software because they don't keep VoiceOver running. I suggest adding `AXManualAccessibility` for programmatically enabling it in Electron apps. The reason for a new attribute is that `AXEnhancedUserInterface` is already reserved by VoiceOver. Adding this attribute will allow both Electron developers and 3rd party developers to enable and disable accessibility from their code by calling `accessibilitySetValue:forAttribute:` on the application. It will be also possible to create a small utility app to switch accessibility in Electron-based apps until there's a native UI solution (like the accessibility settings page in Chrome).
97 lines
2.9 KiB
Text
97 lines
2.9 KiB
Text
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#import "atom/browser/mac/atom_application.h"
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#include "atom/browser/browser.h"
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#include "base/auto_reset.h"
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#include "base/strings/sys_string_conversions.h"
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#include "content/public/browser/browser_accessibility_state.h"
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@implementation AtomApplication
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+ (AtomApplication*)sharedApplication {
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return (AtomApplication*)[super sharedApplication];
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}
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- (BOOL)isHandlingSendEvent {
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return handlingSendEvent_;
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}
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- (void)sendEvent:(NSEvent*)event {
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base::AutoReset<BOOL> scoper(&handlingSendEvent_, YES);
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[super sendEvent:event];
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}
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- (void)setHandlingSendEvent:(BOOL)handlingSendEvent {
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handlingSendEvent_ = handlingSendEvent;
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}
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- (void)setCurrentActivity:(NSString*)type
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withUserInfo:(NSDictionary*)userInfo
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withWebpageURL:(NSURL*)webpageURL {
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currentActivity_ = base::scoped_nsobject<NSUserActivity>(
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[[NSUserActivity alloc] initWithActivityType:type]);
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[currentActivity_ setUserInfo:userInfo];
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[currentActivity_ setWebpageURL:webpageURL];
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[currentActivity_ becomeCurrent];
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}
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- (NSUserActivity*)getCurrentActivity {
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return currentActivity_.get();
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}
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- (void)awakeFromNib {
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[[NSAppleEventManager sharedAppleEventManager]
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setEventHandler:self
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andSelector:@selector(handleURLEvent:withReplyEvent:)
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forEventClass:kInternetEventClass
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andEventID:kAEGetURL];
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}
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- (void)handleURLEvent:(NSAppleEventDescriptor*)event
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withReplyEvent:(NSAppleEventDescriptor*)replyEvent {
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NSString* url = [
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[event paramDescriptorForKeyword:keyDirectObject] stringValue];
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atom::Browser::Get()->OpenURL(base::SysNSStringToUTF8(url));
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}
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- (bool)voiceOverEnabled {
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NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
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[defaults addSuiteNamed:@"com.apple.universalaccess"];
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[defaults synchronize];
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return [defaults boolForKey:@"voiceOverOnOffKey"];
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}
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- (void)accessibilitySetValue:(id)value forAttribute:(NSString *)attribute {
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// Undocumented attribute that VoiceOver happens to set while running.
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// Chromium uses this too, even though it's not exactly right.
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if ([attribute isEqualToString:@"AXEnhancedUserInterface"]) {
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bool enableAccessibility = ([self voiceOverEnabled] && [value boolValue]);
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[self updateAccessibilityEnabled:enableAccessibility];
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}
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else if ([attribute isEqualToString:@"AXManualAccessibility"]) {
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[self updateAccessibilityEnabled:[value boolValue]];
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}
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return [super accessibilitySetValue:value forAttribute:attribute];
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}
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- (void)updateAccessibilityEnabled:(BOOL)enabled {
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auto ax_state = content::BrowserAccessibilityState::GetInstance();
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if (enabled) {
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ax_state->OnScreenReaderDetected();
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} else {
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ax_state->DisableAccessibility();
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}
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atom::Browser::Get()->OnAccessibilitySupportChanged();
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}
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- (void)orderFrontStandardAboutPanel:(id)sender {
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atom::Browser::Get()->ShowAboutPanel();
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}
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@end
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