LCOV - code coverage report
Current view: directory - content/xbl/src - nsXBLProtoImplProperty.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 173 0 0.0 %
Date: 2012-06-02 Functions: 13 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   David Hyatt <hyatt@netscape.com> (Original Author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "nsIAtom.h"
      40                 : #include "nsString.h"
      41                 : #include "jsapi.h"
      42                 : #include "nsIContent.h"
      43                 : #include "nsIDocument.h"
      44                 : #include "nsString.h"
      45                 : #include "nsXBLProtoImplProperty.h"
      46                 : #include "nsUnicharUtils.h"
      47                 : #include "nsReadableUtils.h"
      48                 : #include "nsIScriptContext.h"
      49                 : #include "nsIScriptGlobalObject.h"
      50                 : #include "nsContentUtils.h"
      51                 : #include "nsXBLPrototypeBinding.h"
      52                 : #include "nsXBLSerialize.h"
      53                 : 
      54               0 : nsXBLProtoImplProperty::nsXBLProtoImplProperty(const PRUnichar* aName,
      55                 :                                                const PRUnichar* aGetter, 
      56                 :                                                const PRUnichar* aSetter,
      57                 :                                                const PRUnichar* aReadOnly) :
      58                 :   nsXBLProtoImplMember(aName), 
      59                 :   mGetterText(nsnull),
      60                 :   mSetterText(nsnull),
      61                 :   mJSAttributes(JSPROP_ENUMERATE)
      62                 : #ifdef DEBUG
      63               0 :   , mIsCompiled(false)
      64                 : #endif
      65                 : {
      66               0 :   MOZ_COUNT_CTOR(nsXBLProtoImplProperty);
      67                 : 
      68               0 :   if (aReadOnly) {
      69               0 :     nsAutoString readOnly; readOnly.Assign(*aReadOnly);
      70               0 :     if (readOnly.LowerCaseEqualsLiteral("true"))
      71               0 :       mJSAttributes |= JSPROP_READONLY;
      72                 :   }
      73                 : 
      74               0 :   if (aGetter)
      75               0 :     AppendGetterText(nsDependentString(aGetter));
      76               0 :   if (aSetter)
      77               0 :     AppendSetterText(nsDependentString(aSetter));
      78               0 : }
      79                 : 
      80               0 : nsXBLProtoImplProperty::nsXBLProtoImplProperty(const PRUnichar* aName,
      81                 :                                                const bool aIsReadOnly)
      82                 :   : nsXBLProtoImplMember(aName),
      83                 :     mGetterText(nsnull),
      84                 :     mSetterText(nsnull),
      85                 :     mJSAttributes(JSPROP_ENUMERATE)
      86                 : #ifdef DEBUG
      87               0 :   , mIsCompiled(false)
      88                 : #endif
      89                 : {
      90               0 :   MOZ_COUNT_CTOR(nsXBLProtoImplProperty);
      91                 : 
      92               0 :   if (aIsReadOnly)
      93               0 :     mJSAttributes |= JSPROP_READONLY;
      94               0 : }
      95                 : 
      96               0 : nsXBLProtoImplProperty::~nsXBLProtoImplProperty()
      97                 : {
      98               0 :   MOZ_COUNT_DTOR(nsXBLProtoImplProperty);
      99                 : 
     100               0 :   if (!(mJSAttributes & JSPROP_GETTER)) {
     101               0 :     delete mGetterText;
     102                 :   }
     103                 : 
     104               0 :   if (!(mJSAttributes & JSPROP_SETTER)) {
     105               0 :     delete mSetterText;
     106                 :   }
     107               0 : }
     108                 : 
     109                 : void 
     110               0 : nsXBLProtoImplProperty::AppendGetterText(const nsAString& aText)
     111                 : {
     112               0 :   NS_PRECONDITION(!mIsCompiled,
     113                 :                   "Must not be compiled when accessing getter text");
     114               0 :   if (!mGetterText) {
     115               0 :     mGetterText = new nsXBLTextWithLineNumber();
     116               0 :     if (!mGetterText)
     117               0 :       return;
     118                 :   }
     119                 : 
     120               0 :   mGetterText->AppendText(aText);
     121                 : }
     122                 : 
     123                 : void 
     124               0 : nsXBLProtoImplProperty::AppendSetterText(const nsAString& aText)
     125                 : {
     126               0 :   NS_PRECONDITION(!mIsCompiled,
     127                 :                   "Must not be compiled when accessing setter text");
     128               0 :   if (!mSetterText) {
     129               0 :     mSetterText = new nsXBLTextWithLineNumber();
     130               0 :     if (!mSetterText)
     131               0 :       return;
     132                 :   }
     133                 : 
     134               0 :   mSetterText->AppendText(aText);
     135                 : }
     136                 : 
     137                 : void
     138               0 : nsXBLProtoImplProperty::SetGetterLineNumber(PRUint32 aLineNumber)
     139                 : {
     140               0 :   NS_PRECONDITION(!mIsCompiled,
     141                 :                   "Must not be compiled when accessing getter text");
     142               0 :   if (!mGetterText) {
     143               0 :     mGetterText = new nsXBLTextWithLineNumber();
     144               0 :     if (!mGetterText)
     145               0 :       return;
     146                 :   }
     147                 : 
     148               0 :   mGetterText->SetLineNumber(aLineNumber);
     149                 : }
     150                 : 
     151                 : void
     152               0 : nsXBLProtoImplProperty::SetSetterLineNumber(PRUint32 aLineNumber)
     153                 : {
     154               0 :   NS_PRECONDITION(!mIsCompiled,
     155                 :                   "Must not be compiled when accessing setter text");
     156               0 :   if (!mSetterText) {
     157               0 :     mSetterText = new nsXBLTextWithLineNumber();
     158               0 :     if (!mSetterText)
     159               0 :       return;
     160                 :   }
     161                 : 
     162               0 :   mSetterText->SetLineNumber(aLineNumber);
     163                 : }
     164                 : 
     165                 : const char* gPropertyArgs[] = { "val" };
     166                 : 
     167                 : nsresult
     168               0 : nsXBLProtoImplProperty::InstallMember(nsIScriptContext* aContext,
     169                 :                                       nsIContent* aBoundElement, 
     170                 :                                       void* aScriptObject,
     171                 :                                       void* aTargetClassObject,
     172                 :                                       const nsCString& aClassStr)
     173                 : {
     174               0 :   NS_PRECONDITION(mIsCompiled,
     175                 :                   "Should not be installing an uncompiled property");
     176               0 :   JSContext* cx = aContext->GetNativeContext();
     177                 : 
     178               0 :   nsIDocument *ownerDoc = aBoundElement->OwnerDoc();
     179                 :   nsIScriptGlobalObject *sgo;
     180                 : 
     181               0 :   if (!(sgo = ownerDoc->GetScopeObject())) {
     182               0 :     return NS_ERROR_UNEXPECTED;
     183                 :   }
     184                 : 
     185               0 :   JSObject * scriptObject = (JSObject *) aScriptObject;
     186               0 :   NS_ASSERTION(scriptObject, "uh-oh, script Object should NOT be null or bad things will happen");
     187               0 :   if (!scriptObject)
     188               0 :     return NS_ERROR_FAILURE;
     189                 : 
     190               0 :   JSObject * targetClassObject = (JSObject *) aTargetClassObject;
     191               0 :   JSObject * globalObject = sgo->GetGlobalJSObject();
     192                 : 
     193                 :   // now we want to reevaluate our property using aContext and the script object for this window...
     194               0 :   if ((mJSGetterObject || mJSSetterObject) && targetClassObject) {
     195               0 :     JSObject * getter = nsnull;
     196               0 :     JSAutoRequest ar(cx);
     197               0 :     JSAutoEnterCompartment ac;
     198                 : 
     199               0 :     if (!ac.enter(cx, globalObject))
     200               0 :       return NS_ERROR_UNEXPECTED;
     201                 : 
     202               0 :     if (mJSGetterObject)
     203               0 :       if (!(getter = ::JS_CloneFunctionObject(cx, mJSGetterObject, globalObject)))
     204               0 :         return NS_ERROR_OUT_OF_MEMORY;
     205                 : 
     206               0 :     JSObject * setter = nsnull;
     207               0 :     if (mJSSetterObject)
     208               0 :       if (!(setter = ::JS_CloneFunctionObject(cx, mJSSetterObject, globalObject)))
     209               0 :         return NS_ERROR_OUT_OF_MEMORY;
     210                 : 
     211               0 :     nsDependentString name(mName);
     212               0 :     if (!::JS_DefineUCProperty(cx, targetClassObject,
     213                 :                                reinterpret_cast<const jschar*>(mName),
     214                 :                                name.Length(), JSVAL_VOID,
     215                 :                                JS_DATA_TO_FUNC_PTR(JSPropertyOp, getter),
     216                 :                                JS_DATA_TO_FUNC_PTR(JSStrictPropertyOp, setter),
     217               0 :                                mJSAttributes))
     218               0 :       return NS_ERROR_OUT_OF_MEMORY;
     219                 :   }
     220               0 :   return NS_OK;
     221                 : }
     222                 : 
     223                 : nsresult 
     224               0 : nsXBLProtoImplProperty::CompileMember(nsIScriptContext* aContext, const nsCString& aClassStr,
     225                 :                                       JSObject* aClassObject)
     226                 : {
     227               0 :   NS_PRECONDITION(!mIsCompiled,
     228                 :                   "Trying to compile an already-compiled property");
     229               0 :   NS_PRECONDITION(aClassObject,
     230                 :                   "Must have class object to compile");
     231                 : 
     232               0 :   if (!mName)
     233               0 :     return NS_ERROR_FAILURE; // Without a valid name, we can't install the member.
     234                 : 
     235                 :   // We have a property.
     236               0 :   nsresult rv = NS_OK;
     237                 : 
     238               0 :   nsCAutoString functionUri;
     239               0 :   if (mGetterText || mSetterText) {
     240               0 :     functionUri = aClassStr;
     241               0 :     PRInt32 hash = functionUri.RFindChar('#');
     242               0 :     if (hash != kNotFound) {
     243               0 :       functionUri.Truncate(hash);
     244                 :     }
     245                 :   }
     246                 : 
     247               0 :   bool deletedGetter = false;
     248               0 :   if (mGetterText && mGetterText->GetText()) {
     249               0 :     nsDependentString getter(mGetterText->GetText());
     250               0 :     if (!getter.IsEmpty()) {
     251                 :       // Compile into a temp object so we don't wipe out mGetterText
     252               0 :       JSObject* getterObject = nsnull;
     253                 :       rv = aContext->CompileFunction(aClassObject,
     254               0 :                                      NS_LITERAL_CSTRING("get_") +
     255               0 :                                      NS_ConvertUTF16toUTF8(mName),
     256                 :                                      0,
     257                 :                                      nsnull,
     258                 :                                      getter, 
     259                 :                                      functionUri.get(),
     260                 :                                      mGetterText->GetLineNumber(),
     261                 :                                      JSVERSION_LATEST,
     262                 :                                      true,
     263               0 :                                      &getterObject);
     264                 : 
     265                 :       // Make sure we free mGetterText here before setting mJSGetterObject, since
     266                 :       // that'll overwrite mGetterText
     267               0 :       delete mGetterText;
     268               0 :       deletedGetter = true;
     269               0 :       mJSGetterObject = getterObject;
     270                 :     
     271               0 :       if (mJSGetterObject && NS_SUCCEEDED(rv)) {
     272               0 :         mJSAttributes |= JSPROP_GETTER | JSPROP_SHARED;
     273                 :       }
     274               0 :       if (NS_FAILED(rv)) {
     275               0 :         mJSGetterObject = nsnull;
     276               0 :         mJSAttributes &= ~JSPROP_GETTER;
     277                 :         /*chaining to return failure*/
     278                 :       }
     279                 :     }
     280                 :   } // if getter is not empty
     281                 : 
     282               0 :   if (!deletedGetter) {  // Empty getter
     283               0 :     delete mGetterText;
     284               0 :     mJSGetterObject = nsnull;
     285                 :   }
     286                 :   
     287               0 :   if (NS_FAILED(rv)) {
     288                 :     // We failed to compile our getter.  So either we've set it to null, or
     289                 :     // it's still set to the text object.  In either case, it's safe to return
     290                 :     // the error here, since then we'll be cleaned up as uncompiled and that
     291                 :     // will be ok.  Going on and compiling the setter and _then_ returning an
     292                 :     // error, on the other hand, will try to clean up a compiled setter as
     293                 :     // uncompiled and crash.
     294               0 :     return rv;
     295                 :   }
     296                 : 
     297               0 :   bool deletedSetter = false;
     298               0 :   if (mSetterText && mSetterText->GetText()) {
     299               0 :     nsDependentString setter(mSetterText->GetText());
     300               0 :     if (!setter.IsEmpty()) {
     301                 :       // Compile into a temp object so we don't wipe out mSetterText
     302               0 :       JSObject* setterObject = nsnull;
     303                 :       rv = aContext->CompileFunction(aClassObject,
     304               0 :                                      NS_LITERAL_CSTRING("set_") +
     305               0 :                                      NS_ConvertUTF16toUTF8(mName),
     306                 :                                      1,
     307                 :                                      gPropertyArgs,
     308                 :                                      setter, 
     309                 :                                      functionUri.get(),
     310                 :                                      mSetterText->GetLineNumber(),
     311                 :                                      JSVERSION_LATEST,
     312                 :                                      true,
     313               0 :                                      &setterObject);
     314                 : 
     315                 :       // Make sure we free mSetterText here before setting mJSGetterObject, since
     316                 :       // that'll overwrite mSetterText
     317               0 :       delete mSetterText;
     318               0 :       deletedSetter = true;
     319               0 :       mJSSetterObject = setterObject;
     320                 : 
     321               0 :       if (mJSSetterObject && NS_SUCCEEDED(rv)) {
     322               0 :         mJSAttributes |= JSPROP_SETTER | JSPROP_SHARED;
     323                 :       }
     324               0 :       if (NS_FAILED(rv)) {
     325               0 :         mJSSetterObject = nsnull;
     326               0 :         mJSAttributes &= ~JSPROP_SETTER;
     327                 :         /*chaining to return failure*/
     328                 :       }
     329                 :     }
     330                 :   } // if setter wasn't empty....
     331                 : 
     332               0 :   if (!deletedSetter) {  // Empty setter
     333               0 :     delete mSetterText;
     334               0 :     mJSSetterObject = nsnull;
     335                 :   }
     336                 : 
     337                 : #ifdef DEBUG
     338               0 :   mIsCompiled = NS_SUCCEEDED(rv);
     339                 : #endif
     340                 :   
     341               0 :   return rv;
     342                 : }
     343                 : 
     344                 : void
     345               0 : nsXBLProtoImplProperty::Trace(TraceCallback aCallback, void *aClosure) const
     346                 : {
     347               0 :   if (mJSAttributes & JSPROP_GETTER) {
     348                 :     aCallback(nsIProgrammingLanguage::JAVASCRIPT, mJSGetterObject,
     349               0 :               "mJSGetterObject", aClosure);
     350                 :   }
     351                 : 
     352               0 :   if (mJSAttributes & JSPROP_SETTER) {
     353                 :     aCallback(nsIProgrammingLanguage::JAVASCRIPT, mJSSetterObject,
     354               0 :               "mJSSetterObject", aClosure);
     355                 :   }
     356               0 : }
     357                 : 
     358                 : nsresult
     359               0 : nsXBLProtoImplProperty::Read(nsIScriptContext* aContext,
     360                 :                              nsIObjectInputStream* aStream,
     361                 :                              XBLBindingSerializeDetails aType)
     362                 : {
     363               0 :   if (aType == XBLBinding_Serialize_GetterProperty ||
     364                 :       aType == XBLBinding_Serialize_GetterSetterProperty) {
     365                 :     JSObject* getterObject;
     366               0 :     nsresult rv = XBL_DeserializeFunction(aContext, aStream, &getterObject);
     367               0 :     NS_ENSURE_SUCCESS(rv, rv);
     368                 : 
     369               0 :     mJSGetterObject = getterObject;
     370               0 :     mJSAttributes |= JSPROP_GETTER | JSPROP_SHARED;
     371                 :   }
     372                 : 
     373               0 :   if (aType == XBLBinding_Serialize_SetterProperty ||
     374                 :       aType == XBLBinding_Serialize_GetterSetterProperty) {
     375                 :     JSObject* setterObject;
     376               0 :     nsresult rv = XBL_DeserializeFunction(aContext, aStream, &setterObject);
     377               0 :     NS_ENSURE_SUCCESS(rv, rv);
     378                 : 
     379               0 :     mJSSetterObject = setterObject;
     380               0 :     mJSAttributes |= JSPROP_SETTER | JSPROP_SHARED;
     381                 :   }
     382                 : 
     383                 : #ifdef DEBUG
     384               0 :   mIsCompiled = true;
     385                 : #endif
     386                 : 
     387               0 :   return NS_OK;
     388                 : }
     389                 : 
     390                 : nsresult
     391               0 : nsXBLProtoImplProperty::Write(nsIScriptContext* aContext,
     392                 :                               nsIObjectOutputStream* aStream)
     393                 : {
     394                 :   XBLBindingSerializeDetails type;
     395                 : 
     396               0 :   if (mJSAttributes & JSPROP_GETTER) {
     397                 :     type = mJSAttributes & JSPROP_SETTER ?
     398                 :            XBLBinding_Serialize_GetterSetterProperty :
     399               0 :            XBLBinding_Serialize_GetterProperty;
     400                 :   }
     401                 :   else {
     402               0 :     type = XBLBinding_Serialize_SetterProperty;
     403                 :   }
     404                 : 
     405               0 :   if (mJSAttributes & JSPROP_READONLY) {
     406               0 :     type |= XBLBinding_Serialize_ReadOnly;
     407                 :   }
     408                 : 
     409               0 :   nsresult rv = aStream->Write8(type);
     410               0 :   NS_ENSURE_SUCCESS(rv, rv);
     411               0 :   rv = aStream->WriteWStringZ(mName);
     412               0 :   NS_ENSURE_SUCCESS(rv, rv);
     413                 : 
     414               0 :   if (mJSAttributes & JSPROP_GETTER) {
     415               0 :     rv = XBL_SerializeFunction(aContext, aStream, mJSGetterObject);
     416               0 :     NS_ENSURE_SUCCESS(rv, rv);
     417                 :   }
     418                 : 
     419               0 :   if (mJSAttributes & JSPROP_SETTER) {
     420               0 :     rv = XBL_SerializeFunction(aContext, aStream, mJSSetterObject);
     421               0 :     NS_ENSURE_SUCCESS(rv, rv);
     422                 :   }
     423                 : 
     424               0 :   return NS_OK;
     425                 : }

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