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      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 "Frame.h"
     30 #include "HTMLAllCollection.h"
     31 #include "HTMLBodyElement.h"
     32 #include "HTMLCollection.h"
     33 #include "HTMLDocument.h"
     34 #include "HTMLElement.h"
     35 #include "HTMLIFrameElement.h"
     36 #include "HTMLNames.h"
     37 #include "JSDOMWindow.h"
     38 #include "JSDOMWindowCustom.h"
     39 #include "JSDOMWindowShell.h"
     40 #include "JSHTMLCollection.h"
     41 #include "SegmentedString.h"
     42 #include "DocumentParser.h"
     43 #include <runtime/Error.h>
     44 #include <runtime/JSCell.h>
     45 #include <wtf/unicode/CharacterNames.h>
     46 
     47 using namespace JSC;
     48 
     49 namespace WebCore {
     50 
     51 using namespace HTMLNames;
     52 
     53 bool JSHTMLDocument::canGetItemsForName(ExecState*, HTMLDocument* document, const Identifier& propertyName)
     54 {
     55     AtomicStringImpl* atomicPropertyName = findAtomicString(propertyName);
     56     return atomicPropertyName && (document->hasNamedItem(atomicPropertyName) || document->hasExtraNamedItem(atomicPropertyName));
     57 }
     58 
     59 JSValue JSHTMLDocument::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
     60 {
     61     JSHTMLDocument* thisObj = static_cast<JSHTMLDocument*>(asObject(slotBase));
     62     HTMLDocument* document = static_cast<HTMLDocument*>(thisObj->impl());
     63 
     64     String name = identifierToString(propertyName);
     65     RefPtr<HTMLCollection> collection = document->documentNamedItems(name);
     66 
     67     unsigned length = collection->length();
     68     if (!length)
     69         return jsUndefined();
     70 
     71     if (length == 1) {
     72         Node* node = collection->firstItem();
     73 
     74         Frame* frame;
     75         if (node->hasTagName(iframeTag) && (frame = static_cast<HTMLIFrameElement*>(node)->contentFrame()))
     76             return toJS(exec, frame);
     77 
     78         return toJS(exec, node);
     79     }
     80 
     81     return toJS(exec, collection.get());
     82 }
     83 
     84 // Custom attributes
     85 
     86 JSValue JSHTMLDocument::all(ExecState* exec) const
     87 {
     88     // If "all" has been overwritten, return the overwritten value
     89     JSValue v = getDirect(exec->globalData(), Identifier(exec, "all"));
     90     if (v)
     91         return v;
     92 
     93     return toJS(exec, static_cast<HTMLDocument*>(impl())->all().get());
     94 }
     95 
     96 void JSHTMLDocument::setAll(ExecState* exec, JSValue value)
     97 {
     98     // Add "all" to the property map.
     99     putDirect(exec->globalData(), Identifier(exec, "all"), value);
    100 }
    101 
    102 // Custom functions
    103 
    104 JSValue JSHTMLDocument::open(ExecState* exec)
    105 {
    106     // For compatibility with other browsers, pass open calls with more than 2 parameters to the window.
    107     if (exec->argumentCount() > 2) {
    108         Frame* frame = static_cast<HTMLDocument*>(impl())->frame();
    109         if (frame) {
    110             JSDOMWindowShell* wrapper = toJSDOMWindowShell(frame, currentWorld(exec));
    111             if (wrapper) {
    112                 JSValue function = wrapper->get(exec, Identifier(exec, "open"));
    113                 CallData callData;
    114                 CallType callType = ::getCallData(function, callData);
    115                 if (callType == CallTypeNone)
    116                     return throwTypeError(exec);
    117                 return JSC::call(exec, function, callType, callData, wrapper, ArgList(exec));
    118             }
    119         }
    120         return jsUndefined();
    121     }
    122 
    123     // document.open clobbers the security context of the document and
    124     // aliases it with the active security context.
    125     Document* activeDocument = asJSDOMWindow(exec->lexicalGlobalObject())->impl()->document();
    126 
    127     // In the case of two parameters or fewer, do a normal document open.
    128     static_cast<HTMLDocument*>(impl())->open(activeDocument);
    129     return this;
    130 }
    131 
    132 enum NewlineRequirement { DoNotAddNewline, DoAddNewline };
    133 
    134 static inline void documentWrite(ExecState* exec, HTMLDocument* document, NewlineRequirement addNewline)
    135 {
    136     // DOM only specifies single string argument, but browsers allow multiple or no arguments.
    137 
    138     size_t size = exec->argumentCount();
    139 
    140     UString firstString = exec->argument(0).toString(exec);
    141     SegmentedString segmentedString = ustringToString(firstString);
    142     if (size != 1) {
    143         if (!size)
    144             segmentedString.clear();
    145         else {
    146             for (size_t i = 1; i < size; ++i) {
    147                 UString subsequentString = exec->argument(i).toString(exec);
    148                 segmentedString.append(SegmentedString(ustringToString(subsequentString)));
    149             }
    150         }
    151     }
    152     if (addNewline)
    153         segmentedString.append(SegmentedString(String(&newlineCharacter, 1)));
    154 
    155     Document* activeDocument = asJSDOMWindow(exec->lexicalGlobalObject())->impl()->document();
    156     document->write(segmentedString, activeDocument);
    157 }
    158 
    159 JSValue JSHTMLDocument::write(ExecState* exec)
    160 {
    161     documentWrite(exec, static_cast<HTMLDocument*>(impl()), DoNotAddNewline);
    162     return jsUndefined();
    163 }
    164 
    165 JSValue JSHTMLDocument::writeln(ExecState* exec)
    166 {
    167     documentWrite(exec, static_cast<HTMLDocument*>(impl()), DoAddNewline);
    168     return jsUndefined();
    169 }
    170 
    171 } // namespace WebCore
    172