1 /*

     2  * Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 #include "AccessibilityController.h"

    28 

    29 #include "AccessibilityUIElement.h"

    30 #include <JavaScriptCore/JSRetainPtr.h>

    31 

    32 // Static Value Getters

    33 

    34 static JSValueRef getFocusedElementCallback(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)

    35 {

    36     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    37     return AccessibilityUIElement::makeJSAccessibilityUIElement(context, controller->focusedElement());

    38 }

    39 

    40 static JSValueRef getRootElementCallback(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)

    41 {

    42     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    43     return AccessibilityUIElement::makeJSAccessibilityUIElement(context, controller->rootElement());

    44 }

    45 

    46 // Object Creation

    47 

    48 void AccessibilityController::makeWindowObject(JSContextRef context, JSObjectRef windowObject, JSValueRef* exception)

    49 {

    50     JSRetainPtr<JSStringRef> accessibilityControllerStr(Adopt, JSStringCreateWithUTF8CString("accessibilityController"));

    51     

    52     JSClassRef classRef = getJSClass();

    53     JSValueRef accessibilityControllerObject = JSObjectMake(context, classRef, this);

    54     JSClassRelease(classRef);

    55 

    56     JSObjectSetProperty(context, windowObject, accessibilityControllerStr.get(), accessibilityControllerObject, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete, exception);

    57 }

    58 

    59 static JSValueRef logFocusEventsCallback(JSContextRef ctx, JSObjectRef, JSObjectRef thisObject, size_t, const JSValueRef[], JSValueRef*)

    60 {

    61     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    62     controller->setLogFocusEvents(true);

    63     return JSValueMakeUndefined(ctx);

    64 }

    65 

    66 static JSValueRef logValueChangeEventsCallback(JSContextRef ctx, JSObjectRef, JSObjectRef thisObject, size_t, const JSValueRef[], JSValueRef*)

    67 {

    68     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    69     controller->setLogValueChangeEvents(true);

    70     return JSValueMakeUndefined(ctx);

    71 }

    72 

    73 static JSValueRef logScrollingStartEventsCallback(JSContextRef ctx, JSObjectRef, JSObjectRef thisObject, size_t, const JSValueRef[], JSValueRef*)

    74 {

    75     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    76     controller->setLogScrollingStartEvents(true);

    77     return JSValueMakeUndefined(ctx);

    78 }

    79 

    80 static JSValueRef getElementAtPointCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)

    81 {

    82     int x = 0;

    83     int y = 0;

    84     if (argumentCount == 2) {

    85         x = JSValueToNumber(context, arguments[0], exception);

    86         y = JSValueToNumber(context, arguments[1], exception);

    87     }

    88     

    89     AccessibilityController* controller = static_cast<AccessibilityController*>(JSObjectGetPrivate(thisObject));

    90     return AccessibilityUIElement::makeJSAccessibilityUIElement(context, controller->elementAtPoint(x, y));

    91 }

    92 

    93 JSClassRef AccessibilityController::getJSClass()

    94 {

    95     static JSStaticFunction staticFunctions[] = {

    96         { "logFocusEvents", logFocusEventsCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    97         { "logValueChangeEvents", logValueChangeEventsCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    98         { "logScrollingStartEvents", logScrollingStartEventsCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    99         { "elementAtPoint", getElementAtPointCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

   100         { 0, 0, 0 }

   101     };

   102 

   103     static JSStaticValue staticValues[] = {

   104         { "focusedElement", getFocusedElementCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

   105         { "rootElement", getRootElementCallback, 0, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

   106         { 0, 0, 0, 0 }

   107     };

   108 

   109     static JSClassDefinition classDefinition = {

   110         0, kJSClassAttributeNone, "AccessibilityController", 0, staticValues, staticFunctions,

   111         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

   112     };

   113 

   114     return JSClassCreate(&classDefinition);

   115 }

   116 

   117 void AccessibilityController::resetToConsistentState()

   118 {

   119     setLogFocusEvents(false);

   120     setLogValueChangeEvents(false);

   121     setLogScrollingStartEvents(false);

   122 }