1 /*

     2  * Copyright (C) 2007, 2008, 2009 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 COMPUTER, 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 COMPUTER, 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 "JSStyleSheet.h"

    28 

    29 #include "CSSStyleSheet.h"

    30 #include "Node.h"

    31 #include "JSCSSStyleSheet.h"

    32 #include "JSNode.h"

    33 

    34 using namespace JSC;

    35 

    36 namespace WebCore {

    37 

    38 JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, StyleSheet* styleSheet)

    39 {

    40     if (!styleSheet)

    41         return jsNull();

    42 

    43     DOMObject* wrapper = getCachedDOMObjectWrapper(exec, styleSheet);

    44     if (wrapper)

    45         return wrapper;

    46 

    47     if (styleSheet->isCSSStyleSheet())

    48         wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, CSSStyleSheet, styleSheet);

    49     else

    50         wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, StyleSheet, styleSheet);

    51 

    52     return wrapper;

    53 }

    54 

    55 void JSStyleSheet::markChildren(MarkStack& markStack)

    56 {

    57     Base::markChildren(markStack);

    58 

    59     StyleSheet* sheet = impl();

    60     JSGlobalData& globalData = *Heap::heap(this)->globalData();

    61 

    62     unsigned length = sheet->length();

    63     for (unsigned i = 0; i < length; ++i)

    64         markDOMObjectWrapper(markStack, globalData, sheet->item(i));

    65 

    66     // This prevents us from having a style sheet with a dangling ownerNode pointer.

    67     // A better solution would be to handle this on the DOM side -- if the style sheet

    68     // is kept around, then we want the node to stay around too. One possibility would

    69     // be to make ref/deref on the style sheet ref/deref the node instead, but there's

    70     // a lot of disentangling of the CSS DOM objects that would need to happen first.

    71     if (Node* ownerNode = sheet->ownerNode())

    72         markDOMNodeWrapper(markStack, ownerNode->document(), ownerNode);

    73 }

    74 

    75 } // namespace WebCore