LCOV - code coverage report
Current view: directory - content/base/src - nsMappedAttributes.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 112 0 0.0 %
Date: 2012-06-02 Functions: 19 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.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * IBM Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2004
      20                 :  * IBM Corporation. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   IBM Corporation
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * 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                 : /*
      40                 :  * A unique per-element set of attributes that is used as an
      41                 :  * nsIStyleRule; used to implement presentational attributes.
      42                 :  */
      43                 : 
      44                 : #include "nsMappedAttributes.h"
      45                 : #include "nsHTMLStyleSheet.h"
      46                 : #include "nsRuleWalker.h"
      47                 : #include "prmem.h"
      48                 : #include "mozilla/HashFunctions.h"
      49                 : 
      50                 : using namespace mozilla;
      51                 : 
      52               0 : nsMappedAttributes::nsMappedAttributes(nsHTMLStyleSheet* aSheet,
      53                 :                                        nsMapRuleToAttributesFunc aMapRuleFunc)
      54                 :   : mAttrCount(0),
      55                 :     mSheet(aSheet),
      56               0 :     mRuleMapper(aMapRuleFunc)
      57                 : {
      58               0 : }
      59                 : 
      60               0 : nsMappedAttributes::nsMappedAttributes(const nsMappedAttributes& aCopy)
      61                 :   : mAttrCount(aCopy.mAttrCount),
      62                 :     mSheet(aCopy.mSheet),
      63               0 :     mRuleMapper(aCopy.mRuleMapper)
      64                 : {
      65               0 :   NS_ASSERTION(mBufferSize >= aCopy.mAttrCount, "can't fit attributes");
      66                 : 
      67                 :   PRUint32 i;
      68               0 :   for (i = 0; i < mAttrCount; ++i) {
      69               0 :     new (&Attrs()[i]) InternalAttr(aCopy.Attrs()[i]);
      70                 :   }
      71               0 : }
      72                 : 
      73               0 : nsMappedAttributes::~nsMappedAttributes()
      74                 : {
      75               0 :   if (mSheet) {
      76               0 :     mSheet->DropMappedAttributes(this);
      77                 :   }
      78                 : 
      79                 :   PRUint32 i;
      80               0 :   for (i = 0; i < mAttrCount; ++i) {
      81               0 :     Attrs()[i].~InternalAttr();
      82                 :   }
      83               0 : }
      84                 : 
      85                 : 
      86                 : nsMappedAttributes*
      87               0 : nsMappedAttributes::Clone(bool aWillAddAttr)
      88                 : {
      89               0 :   PRUint32 extra = aWillAddAttr ? 1 : 0;
      90                 : 
      91                 :   // This will call the overridden operator new
      92               0 :   return new (mAttrCount + extra) nsMappedAttributes(*this);
      93                 : }
      94                 : 
      95               0 : void* nsMappedAttributes::operator new(size_t aSize, PRUint32 aAttrCount) CPP_THROW_NEW
      96                 : {
      97               0 :   NS_ASSERTION(aAttrCount > 0, "zero-attribute nsMappedAttributes requested");
      98                 : 
      99                 :   // aSize will include the mAttrs buffer so subtract that.
     100                 :   void* newAttrs = ::operator new(aSize - sizeof(void*[1]) +
     101               0 :                                   aAttrCount * sizeof(InternalAttr));
     102                 : 
     103                 : #ifdef DEBUG
     104               0 :   if (newAttrs) {
     105               0 :     static_cast<nsMappedAttributes*>(newAttrs)->mBufferSize = aAttrCount;
     106                 :   }
     107                 : #endif
     108                 : 
     109               0 :   return newAttrs;
     110                 : }
     111                 : 
     112               0 : NS_IMPL_ISUPPORTS1(nsMappedAttributes,
     113                 :                    nsIStyleRule)
     114                 : 
     115                 : nsresult
     116               0 : nsMappedAttributes::SetAndTakeAttr(nsIAtom* aAttrName, nsAttrValue& aValue)
     117                 : {
     118               0 :   NS_PRECONDITION(aAttrName, "null name");
     119                 : 
     120                 :   PRUint32 i;
     121               0 :   for (i = 0; i < mAttrCount && !Attrs()[i].mName.IsSmaller(aAttrName); ++i) {
     122               0 :     if (Attrs()[i].mName.Equals(aAttrName)) {
     123               0 :       Attrs()[i].mValue.Reset();
     124               0 :       Attrs()[i].mValue.SwapValueWith(aValue);
     125                 : 
     126               0 :       return NS_OK;
     127                 :     }
     128                 :   }
     129                 : 
     130               0 :   NS_ASSERTION(mBufferSize >= mAttrCount + 1, "can't fit attributes");
     131                 : 
     132               0 :   if (mAttrCount != i) {
     133               0 :     memmove(&Attrs()[i + 1], &Attrs()[i], (mAttrCount - i) * sizeof(InternalAttr));
     134                 :   }
     135                 : 
     136               0 :   new (&Attrs()[i].mName) nsAttrName(aAttrName);
     137               0 :   new (&Attrs()[i].mValue) nsAttrValue();
     138               0 :   Attrs()[i].mValue.SwapValueWith(aValue);
     139               0 :   ++mAttrCount;
     140                 : 
     141               0 :   return NS_OK;
     142                 : }
     143                 : 
     144                 : const nsAttrValue*
     145               0 : nsMappedAttributes::GetAttr(nsIAtom* aAttrName) const
     146                 : {
     147               0 :   NS_PRECONDITION(aAttrName, "null name");
     148                 : 
     149               0 :   PRInt32 i = IndexOfAttr(aAttrName, kNameSpaceID_None);
     150               0 :   if (i >= 0) {
     151               0 :     return &Attrs()[i].mValue;
     152                 :   }
     153                 : 
     154               0 :   return nsnull;
     155                 : }
     156                 : 
     157                 : bool
     158               0 : nsMappedAttributes::Equals(const nsMappedAttributes* aOther) const
     159                 : {
     160               0 :   if (this == aOther) {
     161               0 :     return true;
     162                 :   }
     163                 : 
     164               0 :   if (mRuleMapper != aOther->mRuleMapper || mAttrCount != aOther->mAttrCount) {
     165               0 :     return false;
     166                 :   }
     167                 : 
     168                 :   PRUint32 i;
     169               0 :   for (i = 0; i < mAttrCount; ++i) {
     170               0 :     if (!Attrs()[i].mName.Equals(aOther->Attrs()[i].mName) ||
     171               0 :         !Attrs()[i].mValue.Equals(aOther->Attrs()[i].mValue)) {
     172               0 :       return false;
     173                 :     }
     174                 :   }
     175                 : 
     176               0 :   return true;
     177                 : }
     178                 : 
     179                 : PRUint32
     180               0 : nsMappedAttributes::HashValue() const
     181                 : {
     182               0 :   PRUint32 hash = HashGeneric(mRuleMapper);
     183                 : 
     184                 :   PRUint32 i;
     185               0 :   for (i = 0; i < mAttrCount; ++i) {
     186                 :     hash = AddToHash(hash,
     187               0 :                      Attrs()[i].mName.HashValue(),
     188               0 :                      Attrs()[i].mValue.HashValue());
     189                 :   }
     190                 : 
     191               0 :   return hash;
     192                 : }
     193                 : 
     194                 : void
     195               0 : nsMappedAttributes::SetStyleSheet(nsHTMLStyleSheet* aSheet)
     196                 : {
     197               0 :   if (mSheet) {
     198               0 :     mSheet->DropMappedAttributes(this);
     199                 :   }
     200               0 :   mSheet = aSheet;  // not ref counted
     201               0 : }
     202                 : 
     203                 : /* virtual */ void
     204               0 : nsMappedAttributes::MapRuleInfoInto(nsRuleData* aRuleData)
     205                 : {
     206               0 :   if (mRuleMapper) {
     207               0 :     (*mRuleMapper)(this, aRuleData);
     208                 :   }
     209               0 : }
     210                 : 
     211                 : #ifdef DEBUG
     212                 : /* virtual */ void
     213               0 : nsMappedAttributes::List(FILE* out, PRInt32 aIndent) const
     214                 : {
     215               0 :   nsAutoString buffer;
     216                 :   PRUint32 i;
     217                 : 
     218               0 :   for (i = 0; i < mAttrCount; ++i) {
     219                 :     PRInt32 indent;
     220               0 :     for (indent = aIndent; indent > 0; --indent)
     221               0 :       fputs("  ", out);
     222                 : 
     223               0 :     Attrs()[i].mName.GetQualifiedName(buffer);
     224               0 :     fputs(NS_LossyConvertUTF16toASCII(buffer).get(), out);
     225                 : 
     226               0 :     Attrs()[i].mValue.ToString(buffer);
     227               0 :     fputs(NS_LossyConvertUTF16toASCII(buffer).get(), out);
     228               0 :     fputs("\n", out);
     229                 :   }
     230               0 : }
     231                 : #endif
     232                 : 
     233                 : void
     234               0 : nsMappedAttributes::RemoveAttrAt(PRUint32 aPos, nsAttrValue& aValue)
     235                 : {
     236               0 :   Attrs()[aPos].mValue.SwapValueWith(aValue);
     237               0 :   Attrs()[aPos].~InternalAttr();
     238               0 :   memmove(&Attrs()[aPos], &Attrs()[aPos + 1],
     239               0 :           (mAttrCount - aPos - 1) * sizeof(InternalAttr));
     240               0 :   mAttrCount--;
     241               0 : }
     242                 : 
     243                 : const nsAttrName*
     244               0 : nsMappedAttributes::GetExistingAttrNameFromQName(const nsAString& aName) const
     245                 : {
     246                 :   PRUint32 i;
     247               0 :   for (i = 0; i < mAttrCount; ++i) {
     248               0 :     if (Attrs()[i].mName.IsAtom()) {
     249               0 :       if (Attrs()[i].mName.Atom()->Equals(aName)) {
     250               0 :         return &Attrs()[i].mName;
     251                 :       }
     252                 :     }
     253                 :     else {
     254               0 :       if (Attrs()[i].mName.NodeInfo()->QualifiedNameEquals(aName)) {
     255               0 :         return &Attrs()[i].mName;
     256                 :       }
     257                 :     }
     258                 :   }
     259                 : 
     260               0 :   return nsnull;
     261                 : }
     262                 : 
     263                 : PRInt32
     264               0 : nsMappedAttributes::IndexOfAttr(nsIAtom* aLocalName, PRInt32 aNamespaceID) const
     265                 : {
     266                 :   PRUint32 i;
     267               0 :   if (aNamespaceID == kNameSpaceID_None) {
     268                 :     // This should be the common case so lets make an optimized loop
     269               0 :     for (i = 0; i < mAttrCount; ++i) {
     270               0 :       if (Attrs()[i].mName.Equals(aLocalName)) {
     271               0 :         return i;
     272                 :       }
     273                 :     }
     274                 :   }
     275                 :   else {
     276               0 :     for (i = 0; i < mAttrCount; ++i) {
     277               0 :       if (Attrs()[i].mName.Equals(aLocalName, aNamespaceID)) {
     278               0 :         return i;
     279                 :       }
     280                 :     }
     281                 :   }
     282                 : 
     283               0 :   return -1;
     284                 : }
     285                 : 
     286                 : size_t
     287               0 : nsMappedAttributes::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
     288                 : {
     289               0 :   NS_ASSERTION(mAttrCount == mBufferSize,
     290                 :                "mBufferSize and mAttrCount are expected to be the same.");
     291                 : 
     292               0 :   size_t n = aMallocSizeOf(this);
     293               0 :   for (PRUint16 i = 0; i < mAttrCount; ++i) {
     294               0 :     n += Attrs()[i].mValue.SizeOfExcludingThis(aMallocSizeOf);
     295                 :   }
     296               0 :   return n;
     297                 : }
     298                 : 

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