1 files changed, 174 insertions, 0 deletions
diff --git a/accessible/mac/Platform.mm b/accessible/mac/Platform.mm
new file mode 100644
index 0000000000..a104bf904c
--- /dev/null
+++ b/accessible/mac/Platform.mm
@@ -0,0 +1,174 @@
+/* -*- 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 <Cocoa/Cocoa.h>
+
+#include "Platform.h"
+#include "ProxyAccessible.h"
+#include "DocAccessibleParent.h"
+#include "mozTableAccessible.h"
+
+#include "nsAppShell.h"
+
+namespace mozilla {
+namespace a11y {
+
+// Mac a11y whitelisting
+static bool sA11yShouldBeEnabled = false;
+
+bool
+ShouldA11yBeEnabled()
+{
+  EPlatformDisabledState disabledState = PlatformDisabledState();
+  return (disabledState == ePlatformIsForceEnabled) || ((disabledState == ePlatformIsEnabled) && sA11yShouldBeEnabled);
+}
+
+void
+PlatformInit()
+{
+}
+
+void
+PlatformShutdown()
+{
+}
+
+void
+ProxyCreated(ProxyAccessible* aProxy, uint32_t)
+{
+  // Pass in dummy state for now as retrieving proxy state requires IPC.
+  // Note that we can use ProxyAccessible::IsTable* functions here because they
+  // do not use IPC calls but that might change after bug 1210477.
+  Class type;
+  if (aProxy->IsTable())
+    type = [mozTableAccessible class];
+  else if (aProxy->IsTableRow())
+    type = [mozTableRowAccessible class];
+  else if (aProxy->IsTableCell())
+    type = [mozTableCellAccessible class];
+  else
+    type = GetTypeFromRole(aProxy->Role());
+
+  uintptr_t accWrap = reinterpret_cast<uintptr_t>(aProxy) | IS_PROXY;
+  mozAccessible* mozWrapper = [[type alloc] initWithAccessible:accWrap];
+  aProxy->SetWrapper(reinterpret_cast<uintptr_t>(mozWrapper));
+
+  mozAccessible* nativeParent = nullptr;
+  if (aProxy->IsDoc() && aProxy->AsDoc()->IsTopLevel()) {
+    // If proxy is top level, the parent we need to invalidate the children of
+    // will be a non-remote accessible.
+    Accessible* outerDoc = aProxy->OuterDocOfRemoteBrowser();
+    if (outerDoc) {
+      nativeParent = GetNativeFromGeckoAccessible(outerDoc);
+    }
+  } else {
+    // Non-top level proxies need proxy parents' children invalidated.
+    ProxyAccessible* parent = aProxy->Parent();
+    nativeParent = GetNativeFromProxy(parent);
+    NS_ASSERTION(parent, "a non-top-level proxy is missing a parent?");
+  }
+
+  if (nativeParent) {
+    [nativeParent invalidateChildren];
+  }
+}
+
+void
+ProxyDestroyed(ProxyAccessible* aProxy)
+{
+  mozAccessible* nativeParent = nil;
+  if (aProxy->IsDoc() && aProxy->AsDoc()->IsTopLevel()) {
+    // Invalidate native parent in parent process's children on proxy destruction
+    Accessible* outerDoc = aProxy->OuterDocOfRemoteBrowser();
+    if (outerDoc) {
+      nativeParent = GetNativeFromGeckoAccessible(outerDoc);
+    }
+  } else {
+    if (!aProxy->Document()->IsShutdown()) {
+      // Only do if the document has not been shut down, else parent will return
+      // garbage since we don't shut down children from top down.
+      ProxyAccessible* parent = aProxy->Parent();
+      // Invalidate proxy parent's children.
+      if (parent) {
+        nativeParent = GetNativeFromProxy(parent);
+      }
+    }
+  }
+
+  mozAccessible* wrapper = GetNativeFromProxy(aProxy);
+  [wrapper expire];
+  [wrapper release];
+  aProxy->SetWrapper(0);
+
+  if (nativeParent) {
+    [nativeParent invalidateChildren];
+  }
+}
+
+void
+ProxyEvent(ProxyAccessible* aProxy, uint32_t aEventType)
+{
+  // ignore everything but focus-changed, value-changed, caret and selection
+  // events for now.
+  if (aEventType != nsIAccessibleEvent::EVENT_FOCUS &&
+      aEventType != nsIAccessibleEvent::EVENT_VALUE_CHANGE &&
+      aEventType != nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE &&
+      aEventType != nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED &&
+      aEventType != nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED)
+    return;
+
+  mozAccessible* wrapper = GetNativeFromProxy(aProxy);
+  if (wrapper)
+    FireNativeEvent(wrapper, aEventType);
+}
+
+void
+ProxyStateChangeEvent(ProxyAccessible* aProxy, uint64_t, bool)
+{
+  // mac doesn't care about state change events
+}
+
+void
+ProxyCaretMoveEvent(ProxyAccessible* aTarget, int32_t aOffset)
+{
+  mozAccessible* wrapper = GetNativeFromProxy(aTarget);
+  if (wrapper)
+    [wrapper selectedTextDidChange];
+}
+
+void
+ProxyTextChangeEvent(ProxyAccessible*, const nsString&, int32_t, uint32_t,
+                     bool, bool)
+{
+}
+
+void
+ProxyShowHideEvent(ProxyAccessible*, ProxyAccessible*, bool, bool)
+{
+}
+
+void
+ProxySelectionEvent(ProxyAccessible*, ProxyAccessible*, uint32_t)
+{
+}
+} // namespace a11y
+} // namespace mozilla
+
+@interface GeckoNSApplication(a11y)
+-(void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute;
+@end
+
+@implementation GeckoNSApplication(a11y)
+
+-(void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute
+{
+  if ([attribute isEqualToString:@"AXEnhancedUserInterface"])
+    mozilla::a11y::sA11yShouldBeEnabled = ([value intValue] == 1);
+
+  return [super accessibilitySetValue:value forAttribute:attribute];
+}
+
+@end
+