bindings/c/c_utility.cpp

   1 /*
   2  * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.
   3  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28
  29 #if ENABLE(NETSCAPE_API)
  30
  31 #include "c_utility.h"
  32
  33 #include "NP_jsobject.h"
  34 #include "c_instance.h"
  35 #include "JSGlobalObject.h"
  36 #include "npruntime_impl.h"
  37 #include "npruntime_priv.h"
  38 #include "runtime_object.h"
  39 #include "runtime_root.h"
  40 #include "Platform.h"
  41 #include <wtf/Assertions.h>
  42 #include <wtf/unicode/UTF8.h>
  43
  44 using namespace WTF::Unicode;
  45
  46 namespace KJS { namespace Bindings {
  47
  48 // Requires free() of returned UTF16Chars.
  49 static void convertUTF8ToUTF16WithLatin1Fallback(const NPUTF8* UTF8Chars, int UTF8Length, NPUTF16** UTF16Chars, unsigned int* UTF16Length)
  50 {
  51     ASSERT(UTF8Chars || UTF8Length == 0);
  52     ASSERT(UTF16Chars);
  53
  54     if (UTF8Length == -1)
  55         UTF8Length = static_cast<int>(strlen(UTF8Chars));
  56
  57     *UTF16Length = UTF8Length;
  58     *UTF16Chars = static_cast<NPUTF16*>(malloc(sizeof(NPUTF16) * (*UTF16Length)));
  59
  60     const char* sourcestart = UTF8Chars;
  61     const char* sourceend = sourcestart + UTF8Length;
  62
  63     ::UChar* targetstart = reinterpret_cast< ::UChar*>(*UTF16Chars);
  64     ::UChar* targetend = targetstart + UTF8Length;
  65
  66     ConversionResult result = convertUTF8ToUTF16(&sourcestart, sourceend, &targetstart, targetend);
  67
  68     *UTF16Length = targetstart - reinterpret_cast< ::UChar*>(*UTF16Chars);
  69
  70     // Check to see if the conversion was successful
  71     // Some plugins return invalid UTF-8 in NPVariantType_String, see <http://bugs.webkit.org/show_bug.cgi?id=5163>
  72     // There is no "bad data" for latin1. It is unlikely that the plugin was really sending text in this encoding,
  73     // but it should have used UTF-8, and now we are simply avoiding a crash.
  74     if (result != conversionOK) {
  75         *UTF16Length = UTF8Length;
  76
  77         if (!*UTF16Chars)   // If the memory wasn't allocated, allocate it.
  78             *UTF16Chars = (NPUTF16*)malloc(sizeof(NPUTF16) * (*UTF16Length));
  79
  80         for (unsigned i = 0; i < *UTF16Length; i++)
  81             (*UTF16Chars)[i] = UTF8Chars[i] & 0xFF;
  82     }
  83 }
  84
  85 // Variant value must be released with NPReleaseVariantValue()
  86 void convertValueToNPVariant(ExecState *exec, JSValue *value, NPVariant *result)
  87 {
  88     JSLock lock;
  89
  90     JSType type = value->type();
  91
  92     VOID_TO_NPVARIANT(*result);
  93
  94     if (type == StringType) {
  95         UString ustring = value->toString(exec);
  96         CString cstring = ustring.UTF8String();
  97         NPString string = { (const NPUTF8 *)cstring.c_str(), static_cast<uint32_t>(cstring.size()) };
  98         NPN_InitializeVariantWithStringCopy(result, &string);
  99     } else if (type == NumberType) {
 100         DOUBLE_TO_NPVARIANT(value->toNumber(exec), *result);
 101     } else if (type == BooleanType) {
 102         BOOLEAN_TO_NPVARIANT(value->toBoolean(exec), *result);
 103     } else if (type == UnspecifiedType) {
 104         VOID_TO_NPVARIANT(*result);
 105     } else if (type == NullType) {
 106         NULL_TO_NPVARIANT(*result);
 107     } else if (type == ObjectType) {
 108         JSObject* object = static_cast<JSObject*>(value);
 109         if (object->classInfo() == &RuntimeObjectImp::info) {
 110             RuntimeObjectImp* imp = static_cast<RuntimeObjectImp *>(value);
 111             CInstance* instance = static_cast<CInstance*>(imp->getInternalInstance());
 112             if (instance) {
 113                 NPObject* obj = instance->getObject();
 114                 _NPN_RetainObject(obj);
 115                 OBJECT_TO_NPVARIANT(obj, *result);
 116             }
 117         } else {
 118             JSGlobalObject* globalObject = exec->dynamicGlobalObject();
 119
 120             RootObject* rootObject = findRootObject(globalObject);
 121             if (rootObject) {
 122                 NPObject* npObject = _NPN_CreateScriptObject(0, object, rootObject);
 123                 OBJECT_TO_NPVARIANT(npObject, *result);
 124             }
 125         }
 126     }
 127 }
 128
 129 JSValue *convertNPVariantToValue(ExecState*, const NPVariant* variant, RootObject* rootObject)
 130 {
 131     JSLock lock;
 132
 133     NPVariantType type = variant->type;
 134
 135     if (type == NPVariantType_Bool)
 136         return jsBoolean(NPVARIANT_TO_BOOLEAN(*variant));
 137     if (type == NPVariantType_Null)
 138         return jsNull();
 139     if (type == NPVariantType_Void)
 140         return jsUndefined();
 141     if (type == NPVariantType_Int32)
 142         return jsNumber(NPVARIANT_TO_INT32(*variant));
 143     if (type == NPVariantType_Double)
 144         return jsNumber(NPVARIANT_TO_DOUBLE(*variant));
 145     if (type == NPVariantType_String) {
 146         NPUTF16 *stringValue;
 147         unsigned int UTF16Length;
 148         convertNPStringToUTF16(&variant->value.stringValue, &stringValue, &UTF16Length); // requires free() of returned memory
 149         UString resultString((const UChar *)stringValue,UTF16Length);
 150         free(stringValue);
 151         return jsString(resultString);
 152     }
 153     if (type == NPVariantType_Object) {
 154         NPObject *obj = variant->value.objectValue;
 155
 156         if (obj->_class == NPScriptObjectClass)
 157             // Get JSObject from NP_JavaScriptObject.
 158             return ((JavaScriptObject *)obj)->imp;
 159
 160         // Wrap NPObject in a CInstance.
 161         return Instance::createRuntimeObject(Instance::CLanguage, obj, rootObject);
 162     }
 163
 164     return jsUndefined();
 165 }
 166
 167 // Requires free() of returned UTF16Chars.
 168 void convertNPStringToUTF16(const NPString *string, NPUTF16 **UTF16Chars, unsigned int *UTF16Length)
 169 {
 170     convertUTF8ToUTF16WithLatin1Fallback(string->UTF8Characters, string->UTF8Length, UTF16Chars, UTF16Length);
 171 }
 172
 173 Identifier identifierFromNPIdentifier(const NPUTF8* name)
 174 {
 175     NPUTF16 *methodName;
 176     unsigned UTF16Length;
 177     convertUTF8ToUTF16WithLatin1Fallback(name, -1, &methodName, &UTF16Length); // requires free() of returned memory.
 178     Identifier identifier((const KJS::UChar*)methodName, UTF16Length);
 179     free(methodName);
 180     return identifier;
 181 }
 182
 183 } }
 184
 185 #endif // ENABLE(NETSCAPE_API)