LCOV - code coverage report
Current view: directory - layout/base - FramePropertyTable.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 125 0 0.0 %
Date: 2012-06-02 Functions: 10 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 20; 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 Corporation code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Robert O'Callahan <robert@ocallahan.org>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "FramePropertyTable.h"
      39                 : #include "prlog.h"
      40                 : 
      41                 : namespace mozilla {
      42                 : 
      43                 : void
      44               0 : FramePropertyTable::Set(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty,
      45                 :                         void* aValue)
      46                 : {
      47               0 :   NS_ASSERTION(aFrame, "Null frame?");
      48               0 :   NS_ASSERTION(aProperty, "Null property?");
      49                 : 
      50               0 :   if (mLastFrame != aFrame || !mLastEntry) {
      51               0 :     mLastFrame = aFrame;
      52               0 :     mLastEntry = mEntries.PutEntry(aFrame);
      53                 :   }
      54               0 :   Entry* entry = mLastEntry;
      55                 : 
      56               0 :   if (!entry->mProp.IsArray()) {
      57               0 :     if (!entry->mProp.mProperty) {
      58                 :       // Empty entry, so we can just store our property in the empty slot
      59               0 :       entry->mProp.mProperty = aProperty;
      60               0 :       entry->mProp.mValue = aValue;
      61               0 :       return;
      62                 :     }
      63               0 :     if (entry->mProp.mProperty == aProperty) {
      64                 :       // Just overwrite the current value
      65               0 :       entry->mProp.DestroyValueFor(aFrame);
      66               0 :       entry->mProp.mValue = aValue;
      67               0 :       return;
      68                 :     }
      69                 : 
      70                 :     // We need to expand the single current entry to an array
      71               0 :     PropertyValue current = entry->mProp;
      72               0 :     entry->mProp.mProperty = nsnull;
      73                 :     PR_STATIC_ASSERT(sizeof(nsTArray<PropertyValue>) <= sizeof(void *));
      74               0 :     new (&entry->mProp.mValue) nsTArray<PropertyValue>(4);
      75               0 :     entry->mProp.ToArray()->AppendElement(current);
      76                 :   }
      77                 : 
      78               0 :   nsTArray<PropertyValue>* array = entry->mProp.ToArray();
      79                 :   nsTArray<PropertyValue>::index_type index =
      80               0 :     array->IndexOf(aProperty, 0, PropertyComparator());
      81               0 :   if (index != nsTArray<PropertyValue>::NoIndex) {
      82               0 :     PropertyValue* pv = &array->ElementAt(index);
      83               0 :     pv->DestroyValueFor(aFrame);
      84               0 :     pv->mValue = aValue;
      85               0 :     return;
      86                 :   }
      87                 : 
      88               0 :   array->AppendElement(PropertyValue(aProperty, aValue));
      89                 : }
      90                 : 
      91                 : void*
      92               0 : FramePropertyTable::Get(const nsIFrame* aFrame,
      93                 :                         const FramePropertyDescriptor* aProperty,
      94                 :                         bool* aFoundResult)
      95                 : {
      96               0 :   NS_ASSERTION(aFrame, "Null frame?");
      97               0 :   NS_ASSERTION(aProperty, "Null property?");
      98                 : 
      99               0 :   if (aFoundResult) {
     100               0 :     *aFoundResult = false;
     101                 :   }
     102                 : 
     103               0 :   if (mLastFrame != aFrame) {
     104               0 :     mLastFrame = const_cast<nsIFrame*>(aFrame);
     105               0 :     mLastEntry = mEntries.GetEntry(mLastFrame);
     106                 :   }
     107               0 :   Entry* entry = mLastEntry;
     108               0 :   if (!entry)
     109               0 :     return nsnull;
     110                 : 
     111               0 :   if (entry->mProp.mProperty == aProperty) {
     112               0 :     if (aFoundResult) {
     113               0 :       *aFoundResult = true;
     114                 :     }
     115               0 :     return entry->mProp.mValue;
     116                 :   }
     117               0 :   if (!entry->mProp.IsArray()) {
     118                 :     // There's just one property and it's not the one we want, bail
     119               0 :     return nsnull;
     120                 :   }
     121                 : 
     122               0 :   nsTArray<PropertyValue>* array = entry->mProp.ToArray();
     123                 :   nsTArray<PropertyValue>::index_type index =
     124               0 :     array->IndexOf(aProperty, 0, PropertyComparator());
     125               0 :   if (index == nsTArray<PropertyValue>::NoIndex)
     126               0 :     return nsnull;
     127                 : 
     128               0 :   if (aFoundResult) {
     129               0 :     *aFoundResult = true;
     130                 :   }
     131                 : 
     132               0 :   return array->ElementAt(index).mValue;
     133                 : }
     134                 : 
     135                 : void*
     136               0 : FramePropertyTable::Remove(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty,
     137                 :                            bool* aFoundResult)
     138                 : {
     139               0 :   NS_ASSERTION(aFrame, "Null frame?");
     140               0 :   NS_ASSERTION(aProperty, "Null property?");
     141                 : 
     142               0 :   if (aFoundResult) {
     143               0 :     *aFoundResult = false;
     144                 :   }
     145                 : 
     146               0 :   if (mLastFrame != aFrame) {
     147               0 :     mLastFrame = aFrame;
     148               0 :     mLastEntry = mEntries.GetEntry(aFrame);
     149                 :   }
     150               0 :   Entry* entry = mLastEntry;
     151               0 :   if (!entry)
     152               0 :     return nsnull;
     153                 : 
     154               0 :   if (entry->mProp.mProperty == aProperty) {
     155                 :     // There's only one entry and it's the one we want
     156               0 :     void* value = entry->mProp.mValue;
     157               0 :     mEntries.RawRemoveEntry(entry);
     158               0 :     mLastEntry = nsnull;
     159               0 :     if (aFoundResult) {
     160               0 :       *aFoundResult = true;
     161                 :     }
     162               0 :     return value;
     163                 :   }
     164               0 :   if (!entry->mProp.IsArray()) {
     165                 :     // There's just one property and it's not the one we want, bail
     166               0 :     return nsnull;
     167                 :   }
     168                 : 
     169               0 :   nsTArray<PropertyValue>* array = entry->mProp.ToArray();
     170                 :   nsTArray<PropertyValue>::index_type index =
     171               0 :     array->IndexOf(aProperty, 0, PropertyComparator());
     172               0 :   if (index == nsTArray<PropertyValue>::NoIndex) {
     173                 :     // No such property, bail
     174               0 :     return nsnull;
     175                 :   }
     176                 : 
     177               0 :   if (aFoundResult) {
     178               0 :     *aFoundResult = true;
     179                 :   }
     180                 : 
     181               0 :   void* result = array->ElementAt(index).mValue;
     182                 : 
     183               0 :   PRUint32 last = array->Length() - 1;
     184               0 :   array->ElementAt(index) = array->ElementAt(last);
     185               0 :   array->RemoveElementAt(last);
     186                 : 
     187               0 :   if (last == 1) {
     188               0 :     PropertyValue pv = array->ElementAt(0);
     189               0 :     array->~nsTArray<PropertyValue>();
     190               0 :     entry->mProp = pv;
     191                 :   }
     192                 :   
     193               0 :   return result;
     194                 : }
     195                 : 
     196                 : void
     197               0 : FramePropertyTable::Delete(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty)
     198                 : {
     199               0 :   NS_ASSERTION(aFrame, "Null frame?");
     200               0 :   NS_ASSERTION(aProperty, "Null property?");
     201                 : 
     202                 :   bool found;
     203               0 :   void* v = Remove(aFrame, aProperty, &found);
     204               0 :   if (found) {
     205               0 :     PropertyValue pv(aProperty, v);
     206               0 :     pv.DestroyValueFor(aFrame);
     207                 :   }
     208               0 : }
     209                 : 
     210                 : /* static */ void
     211               0 : FramePropertyTable::DeleteAllForEntry(Entry* aEntry)
     212                 : {
     213               0 :   if (!aEntry->mProp.IsArray()) {
     214               0 :     aEntry->mProp.DestroyValueFor(aEntry->GetKey());
     215               0 :     return;
     216                 :   }
     217                 : 
     218               0 :   nsTArray<PropertyValue>* array = aEntry->mProp.ToArray();
     219               0 :   for (PRUint32 i = 0; i < array->Length(); ++i) {
     220               0 :     array->ElementAt(i).DestroyValueFor(aEntry->GetKey());
     221                 :   }
     222               0 :   array->~nsTArray<PropertyValue>();
     223                 : }
     224                 : 
     225                 : void
     226               0 : FramePropertyTable::DeleteAllFor(nsIFrame* aFrame)
     227                 : {
     228               0 :   NS_ASSERTION(aFrame, "Null frame?");
     229                 : 
     230               0 :   Entry* entry = mEntries.GetEntry(aFrame);
     231               0 :   if (!entry)
     232               0 :     return;
     233                 : 
     234               0 :   if (mLastFrame == aFrame) {
     235                 :     // Flush cache. We assume DeleteAllForEntry will be called before
     236                 :     // a frame is destroyed.
     237               0 :     mLastFrame = nsnull;
     238               0 :     mLastEntry = nsnull;
     239                 :   }
     240                 : 
     241               0 :   DeleteAllForEntry(entry);
     242               0 :   mEntries.RawRemoveEntry(entry);
     243                 : }
     244                 : 
     245                 : /* static */ PLDHashOperator
     246               0 : FramePropertyTable::DeleteEnumerator(Entry* aEntry, void* aArg)
     247                 : {
     248               0 :   DeleteAllForEntry(aEntry);
     249               0 :   return PL_DHASH_REMOVE;
     250                 : }
     251                 : 
     252                 : void
     253               0 : FramePropertyTable::DeleteAll()
     254                 : {
     255               0 :   mLastFrame = nsnull;
     256               0 :   mLastEntry = nsnull;
     257                 : 
     258               0 :   mEntries.EnumerateEntries(DeleteEnumerator, nsnull);
     259               0 : }
     260                 : 
     261                 : size_t
     262               0 : FramePropertyTable::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
     263                 : {
     264                 :   return mEntries.SizeOfExcludingThis(SizeOfPropertyTableEntryExcludingThis,
     265               0 :                                       aMallocSizeOf);
     266                 : }
     267                 : 
     268                 : /* static */ size_t
     269               0 : FramePropertyTable::SizeOfPropertyTableEntryExcludingThis(Entry* aEntry,
     270                 :                       nsMallocSizeOfFun aMallocSizeOf, void *)
     271                 : {
     272               0 :   return aEntry->mProp.SizeOfExcludingThis(aMallocSizeOf);
     273                 : }
     274                 : 
     275                 : }

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