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      1 /*
      2  * Copyright (C) 2010 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "AccessibilityController.h"
     33 
     34 #include "TestShell.h"
     35 #include "WebAccessibilityCache.h"
     36 #include "WebAccessibilityObject.h"
     37 #include "WebFrame.h"
     38 #include "WebString.h"
     39 #include "WebView.h"
     40 
     41 using namespace WebKit;
     42 
     43 AccessibilityController::AccessibilityController(TestShell* shell)
     44     : m_dumpAccessibilityNotifications(false)
     45     , m_shell(shell)
     46 {
     47 
     48     bindMethod("dumpAccessibilityNotifications", &AccessibilityController::dumpAccessibilityNotifications);
     49     bindMethod("logFocusEvents", &AccessibilityController::logFocusEventsCallback);
     50     bindMethod("logScrollingStartEvents", &AccessibilityController::logScrollingStartEventsCallback);
     51 
     52     bindProperty("focusedElement", &AccessibilityController::focusedElementGetterCallback);
     53     bindProperty("rootElement", &AccessibilityController::rootElementGetterCallback);
     54 
     55     bindFallbackMethod(&AccessibilityController::fallbackCallback);
     56 }
     57 
     58 void AccessibilityController::bindToJavascript(WebFrame* frame, const WebString& classname)
     59 {
     60     WebAccessibilityCache::enableAccessibility();
     61     CppBoundClass::bindToJavascript(frame, classname);
     62 }
     63 
     64 void AccessibilityController::reset()
     65 {
     66     m_rootElement = WebAccessibilityObject();
     67     m_focusedElement = WebAccessibilityObject();
     68     m_elements.clear();
     69 
     70     m_dumpAccessibilityNotifications = false;
     71 }
     72 
     73 void AccessibilityController::setFocusedElement(const WebAccessibilityObject& focusedElement)
     74 {
     75     m_focusedElement = focusedElement;
     76 }
     77 
     78 AccessibilityUIElement* AccessibilityController::getFocusedElement()
     79 {
     80     if (m_focusedElement.isNull())
     81         m_focusedElement = m_shell->webView()->accessibilityObject();
     82     return m_elements.create(m_focusedElement);
     83 }
     84 
     85 AccessibilityUIElement* AccessibilityController::getRootElement()
     86 {
     87     if (m_rootElement.isNull())
     88         m_rootElement = m_shell->webView()->accessibilityObject();
     89     return m_elements.createRoot(m_rootElement);
     90 }
     91 
     92 void AccessibilityController::dumpAccessibilityNotifications(const CppArgumentList&, CppVariant* result)
     93 {
     94     m_dumpAccessibilityNotifications = true;
     95     result->setNull();
     96 }
     97 
     98 void AccessibilityController::logFocusEventsCallback(const CppArgumentList&, CppVariant* result)
     99 {
    100     // As of r49031, this is not being used upstream.
    101     result->setNull();
    102 }
    103 
    104 void AccessibilityController::logScrollingStartEventsCallback(const CppArgumentList&, CppVariant* result)
    105 {
    106     // As of r49031, this is not being used upstream.
    107     result->setNull();
    108 }
    109 
    110 void AccessibilityController::focusedElementGetterCallback(CppVariant* result)
    111 {
    112     result->set(*(getFocusedElement()->getAsCppVariant()));
    113 }
    114 
    115 void AccessibilityController::rootElementGetterCallback(CppVariant* result)
    116 {
    117     result->set(*(getRootElement()->getAsCppVariant()));
    118 }
    119 
    120 void AccessibilityController::fallbackCallback(const CppArgumentList&, CppVariant* result)
    121 {
    122     printf("CONSOLE MESSAGE: JavaScript ERROR: unknown method called on "
    123            "AccessibilityController\n");
    124     result->setNull();
    125 }
    126