Home | History | Annotate | Download | only in js 
      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 "JSHTMLDocument.h"
     28 
     29 #include "CharacterNames.h"
     30 #include "Frame.h"
     31 #include "HTMLAllCollection.h"
     32 #include "HTMLBodyElement.h"
     33 #include "HTMLCollection.h"
     34 #include "HTMLDocument.h"
     35 #include "HTMLElement.h"
     36 #include "HTMLIFrameElement.h"
     37 #include "HTMLNames.h"
     38 #include "JSDOMWindow.h"
     39 #include "JSDOMWindowCustom.h"
     40 #include "JSDOMWindowShell.h"
     41 #include "JSHTMLCollection.h"
     42 #include "SegmentedString.h"
     43 #include "Tokenizer.h"
     44 #include <runtime/Error.h>
     45 
     46 using namespace JSC;
     47 
     48 namespace WebCore {
     49 
     50 using namespace HTMLNames;
     51 
     52 bool JSHTMLDocument::canGetItemsForName(ExecState*, HTMLDocument* document, const Identifier& propertyName)
     53 {
     54     AtomicStringImpl* atomicPropertyName = AtomicString::find(propertyName);
     55     return atomicPropertyName && (document->hasNamedItem(atomicPropertyName) || document->hasExtraNamedItem(atomicPropertyName));
     56 }
     57 
     58 JSValue JSHTMLDocument::nameGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
     59 {
     60     JSHTMLDocument* thisObj = static_cast<JSHTMLDocument*>(asObject(slot.slotBase()));
     61     HTMLDocument* document = static_cast<HTMLDocument*>(thisObj->impl());
     62 
     63     String name = propertyName;
     64     RefPtr<HTMLCollection> collection = document->documentNamedItems(name);
     65 
     66     unsigned length = collection->length();
     67     if (!length)
     68         return jsUndefined();
     69 
     70     if (length == 1) {
     71         Node* node = collection->firstItem();
     72 
     73         Frame* frame;
     74         if (node->hasTagName(iframeTag) && (frame = static_cast<HTMLIFrameElement*>(node)->contentFrame()))
     75             return toJS(exec, frame);
     76 
     77         return toJS(exec, node);
     78     }
     79 
     80     return toJS(exec, collection.get());
     81 }
     82 
     83 // Custom attributes
     84 
     85 JSValue JSHTMLDocument::all(ExecState* exec) const
     86 {
     87     // If "all" has been overwritten, return the overwritten value
     88     JSValue v = getDirect(Identifier(exec, "all"));
     89     if (v)
     90         return v;
     91 
     92     return toJS(exec, static_cast<HTMLDocument*>(impl())->all().get());
     93 }
     94 
     95 void JSHTMLDocument::setAll(ExecState* exec, JSValue value)
     96 {
     97     // Add "all" to the property map.
     98     putDirect(Identifier(exec, "all"), value);
     99 }
    100 
    101 // Custom functions
    102 
    103 JSValue JSHTMLDocument::open(ExecState* exec, const ArgList& args)
    104 {
    105     // For compatibility with other browsers, pass open calls with more than 2 parameters to the window.
    106     if (args.size() > 2) {
    107         Frame* frame = static_cast<HTMLDocument*>(impl())->frame();
    108         if (frame) {
    109             JSDOMWindowShell* wrapper = toJSDOMWindowShell(frame, currentWorld(exec));
    110             if (wrapper) {
    111                 JSValue function = wrapper->get(exec, Identifier(exec, "open"));
    112                 CallData callData;
    113                 CallType callType = function.getCallData(callData);
    114                 if (callType == CallTypeNone)
    115                     return throwError(exec, TypeError);
    116                 return JSC::call(exec, function, callType, callData, wrapper, args);
    117             }
    118         }
    119         return jsUndefined();
    120     }
    121 
    122     // document.open clobbers the security context of the document and
    123     // aliases it with the active security context.
    124     Document* activeDocument = asJSDOMWindow(exec->lexicalGlobalObject())->impl()->document();
    125 
    126     // In the case of two parameters or fewer, do a normal document open.
    127     static_cast<HTMLDocument*>(impl())->open(activeDocument);
    128     return this;
    129 }
    130 
    131 enum NewlineRequirement { DoNotAddNewline, DoAddNewline };
    132 
    133 static inline void documentWrite(ExecState* exec, const ArgList& args, HTMLDocument* document, NewlineRequirement addNewline)
    134 {
    135     // DOM only specifies single string argument, but browsers allow multiple or no arguments.
    136 
    137     size_t size = args.size();
    138 
    139     UString firstString = args.at(0).toString(exec);
    140     SegmentedString segmentedString = String(firstString);
    141     if (size != 1) {
    142         if (!size)
    143             segmentedString.clear();
    144         else {
    145             for (size_t i = 1; i < size; ++i) {
    146                 UString subsequentString = args.at(i).toString(exec);
    147                 segmentedString.append(SegmentedString(String(subsequentString)));
    148             }
    149         }
    150     }
    151     if (addNewline)
    152         segmentedString.append(SegmentedString(&newlineCharacter, 1));
    153 
    154     Document* activeDocument = asJSDOMWindow(exec->lexicalGlobalObject())->impl()->document();
    155     document->write(segmentedString, activeDocument);
    156 }
    157 
    158 JSValue JSHTMLDocument::write(ExecState* exec, const ArgList& args)
    159 {
    160     documentWrite(exec, args, static_cast<HTMLDocument*>(impl()), DoNotAddNewline);
    161     return jsUndefined();
    162 }
    163 
    164 JSValue JSHTMLDocument::writeln(ExecState* exec, const ArgList& args)
    165 {
    166     documentWrite(exec, args, static_cast<HTMLDocument*>(impl()), DoAddNewline);
    167     return jsUndefined();
    168 }
    169 
    170 } // namespace WebCore
    171