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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "content/browser/accessibility/browser_accessibility_manager_mac.h"
      6 
      7 #import "base/logging.h"
      8 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
      9 #include "content/common/accessibility_messages.h"
     10 
     11 namespace content {
     12 
     13 // static
     14 BrowserAccessibilityManager* BrowserAccessibilityManager::Create(
     15     const AccessibilityNodeData& src,
     16     BrowserAccessibilityDelegate* delegate,
     17     BrowserAccessibilityFactory* factory) {
     18   return new BrowserAccessibilityManagerMac(NULL, src, delegate, factory);
     19 }
     20 
     21 BrowserAccessibilityManagerMac::BrowserAccessibilityManagerMac(
     22     NSView* parent_view,
     23     const AccessibilityNodeData& src,
     24     BrowserAccessibilityDelegate* delegate,
     25     BrowserAccessibilityFactory* factory)
     26     : BrowserAccessibilityManager(src, delegate, factory),
     27       parent_view_(parent_view) {
     28 }
     29 
     30 // static
     31 AccessibilityNodeData BrowserAccessibilityManagerMac::GetEmptyDocument() {
     32   AccessibilityNodeData empty_document;
     33   empty_document.id = 0;
     34   empty_document.role = blink::WebAXRoleRootWebArea;
     35   empty_document.state =
     36       1 << blink::WebAXStateReadonly;
     37   return empty_document;
     38 }
     39 
     40 void BrowserAccessibilityManagerMac::NotifyAccessibilityEvent(
     41     blink::WebAXEvent event_type,
     42     BrowserAccessibility* node) {
     43   if (!node->IsNative())
     44     return;
     45 
     46   // Refer to AXObjectCache.mm (webkit).
     47   NSString* event_id = @"";
     48   switch (event_type) {
     49     case blink::WebAXEventActiveDescendantChanged:
     50       if (node->role() == blink::WebAXRoleTree)
     51         event_id = NSAccessibilitySelectedRowsChangedNotification;
     52       else
     53         event_id = NSAccessibilityFocusedUIElementChangedNotification;
     54       break;
     55     case blink::WebAXEventAlert:
     56       // Not used on Mac.
     57       return;
     58     case blink::WebAXEventBlur:
     59       // A no-op on Mac.
     60       return;
     61     case blink::WebAXEventCheckedStateChanged:
     62       // Not used on Mac.
     63       return;
     64     case blink::WebAXEventChildrenChanged:
     65       // TODO(dtseng): no clear equivalent on Mac.
     66       return;
     67     case blink::WebAXEventFocus:
     68       event_id = NSAccessibilityFocusedUIElementChangedNotification;
     69       break;
     70     case blink::WebAXEventLayoutComplete:
     71       event_id = @"AXLayoutComplete";
     72       break;
     73     case blink::WebAXEventLiveRegionChanged:
     74       event_id = @"AXLiveRegionChanged";
     75       break;
     76     case blink::WebAXEventLoadComplete:
     77       event_id = @"AXLoadComplete";
     78       break;
     79     case blink::WebAXEventMenuListValueChanged:
     80       // Not used on Mac.
     81       return;
     82     case blink::WebAXEventShow:
     83       // Not used on Mac.
     84       return;
     85     case blink::WebAXEventHide:
     86       // Not used on Mac.
     87       return;
     88     case blink::WebAXEventRowCountChanged:
     89       event_id = NSAccessibilityRowCountChangedNotification;
     90       break;
     91     case blink::WebAXEventRowCollapsed:
     92       event_id = @"AXRowCollapsed";
     93       break;
     94     case blink::WebAXEventRowExpanded:
     95       event_id = @"AXRowExpanded";
     96       break;
     97     case blink::WebAXEventScrolledToAnchor:
     98       // Not used on Mac.
     99       return;
    100     case blink::WebAXEventSelectedChildrenChanged:
    101       event_id = NSAccessibilitySelectedChildrenChangedNotification;
    102       break;
    103     case blink::WebAXEventSelectedTextChanged:
    104       event_id = NSAccessibilitySelectedTextChangedNotification;
    105       break;
    106     case blink::WebAXEventTextInserted:
    107       // Not used on Mac.
    108       return;
    109     case blink::WebAXEventTextRemoved:
    110       // Not used on Mac.
    111       return;
    112     case blink::WebAXEventValueChanged:
    113       event_id = NSAccessibilityValueChangedNotification;
    114       break;
    115     case blink::WebAXEventAriaAttributeChanged:
    116       // Not used on Mac.
    117       return;
    118     case blink::WebAXEventAutocorrectionOccured:
    119       // Not used on Mac.
    120       return;
    121     case blink::WebAXEventInvalidStatusChanged:
    122       // Not used on Mac.
    123       return;
    124     case blink::WebAXEventLocationChanged:
    125       // Not used on Mac.
    126       return;
    127     case blink::WebAXEventMenuListItemSelected:
    128       // Not used on Mac.
    129       return;
    130     case blink::WebAXEventTextChanged:
    131       // Not used on Mac.
    132       return;
    133     default:
    134       LOG(WARNING) << "Unknown accessibility event: " << event_type;
    135       return;
    136   }
    137   BrowserAccessibilityCocoa* native_node = node->ToBrowserAccessibilityCocoa();
    138   DCHECK(native_node);
    139   NSAccessibilityPostNotification(native_node, event_id);
    140 }
    141 
    142 }  // namespace content
    143