LCOV - code coverage report
Current view: directory - content/base/src - nsTextNode.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 134 47 35.1 %
Date: 2012-06-02 Functions: 29 13 44.8 %

       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                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or 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                 : /*
      39                 :  * Implementation of DOM Core's nsIDOMText node.
      40                 :  */
      41                 : 
      42                 : #include "nsTextNode.h"
      43                 : #include "nsContentUtils.h"
      44                 : #include "nsIDOMEventListener.h"
      45                 : #include "nsIDOMMutationEvent.h"
      46                 : #include "nsIAttribute.h"
      47                 : #include "nsIDocument.h"
      48                 : #include "nsThreadUtils.h"
      49                 : #ifdef DEBUG
      50                 : #include "nsRange.h"
      51                 : #endif
      52                 : 
      53                 : using namespace mozilla::dom;
      54                 : 
      55                 : /**
      56                 :  * class used to implement attr() generated content
      57                 :  */
      58                 : class nsAttributeTextNode : public nsTextNode,
      59                 :                             public nsStubMutationObserver
      60                 : {
      61                 : public:
      62                 :   NS_DECL_ISUPPORTS_INHERITED
      63                 :   
      64               0 :   nsAttributeTextNode(already_AddRefed<nsINodeInfo> aNodeInfo,
      65                 :                       PRInt32 aNameSpaceID,
      66                 :                       nsIAtom* aAttrName) :
      67                 :     nsTextNode(aNodeInfo),
      68                 :     mGrandparent(nsnull),
      69                 :     mNameSpaceID(aNameSpaceID),
      70               0 :     mAttrName(aAttrName)
      71                 :   {
      72               0 :     NS_ASSERTION(mNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
      73               0 :     NS_ASSERTION(mAttrName, "Must have attr name");
      74               0 :   }
      75                 : 
      76               0 :   virtual ~nsAttributeTextNode() {
      77               0 :     NS_ASSERTION(!mGrandparent, "We were not unbound!");
      78               0 :   }
      79                 : 
      80                 :   virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
      81                 :                               nsIContent* aBindingParent,
      82                 :                               bool aCompileEventHandlers);
      83                 :   virtual void UnbindFromTree(bool aDeep = true,
      84                 :                               bool aNullParent = true);
      85                 : 
      86                 :   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
      87                 :   NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
      88                 : 
      89               0 :   virtual nsGenericDOMDataNode *CloneDataNode(nsINodeInfo *aNodeInfo,
      90                 :                                               bool aCloneText) const
      91                 :   {
      92               0 :     nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
      93                 :     nsAttributeTextNode *it = new nsAttributeTextNode(ni.forget(),
      94                 :                                                       mNameSpaceID,
      95               0 :                                                       mAttrName);
      96               0 :     if (it && aCloneText) {
      97               0 :       it->mText = mText;
      98                 :     }
      99                 : 
     100               0 :     return it;
     101                 :   }
     102                 : 
     103                 :   // Public method for the event to run
     104               0 :   void UpdateText() {
     105               0 :     UpdateText(true);
     106               0 :   }
     107                 : 
     108                 : private:
     109                 :   // Update our text to our parent's current attr value
     110                 :   void UpdateText(bool aNotify);
     111                 : 
     112                 :   // This doesn't need to be a strong pointer because it's only non-null
     113                 :   // while we're bound to the document tree, and it points to an ancestor
     114                 :   // so the ancestor must be bound to the document tree the whole time
     115                 :   // and can't be deleted.
     116                 :   nsIContent* mGrandparent;
     117                 :   // What attribute we're showing
     118                 :   PRInt32 mNameSpaceID;
     119                 :   nsCOMPtr<nsIAtom> mAttrName;
     120                 : };
     121                 : 
     122                 : nsresult
     123           72639 : NS_NewTextNode(nsIContent** aInstancePtrResult,
     124                 :                nsNodeInfoManager *aNodeInfoManager)
     125                 : {
     126           72639 :   NS_PRECONDITION(aNodeInfoManager, "Missing nodeInfoManager");
     127                 : 
     128           72639 :   *aInstancePtrResult = nsnull;
     129                 : 
     130          145278 :   nsCOMPtr<nsINodeInfo> ni = aNodeInfoManager->GetTextNodeInfo();
     131           72639 :   if (!ni) {
     132               0 :     return NS_ERROR_OUT_OF_MEMORY;
     133                 :   }
     134                 : 
     135          145278 :   nsTextNode *instance = new nsTextNode(ni.forget());
     136           72639 :   if (!instance) {
     137               0 :     return NS_ERROR_OUT_OF_MEMORY;
     138                 :   }
     139                 : 
     140           72639 :   NS_ADDREF(*aInstancePtrResult = instance);
     141                 : 
     142           72639 :   return NS_OK;
     143                 : }
     144                 : 
     145           73023 : nsTextNode::nsTextNode(already_AddRefed<nsINodeInfo> aNodeInfo)
     146           73023 :   : nsGenericDOMDataNode(aNodeInfo)
     147                 : {
     148           73023 :   NS_ABORT_IF_FALSE(mNodeInfo->NodeType() == nsIDOMNode::TEXT_NODE,
     149                 :                     "Bad NodeType in aNodeInfo");
     150           73023 : }
     151                 : 
     152          146042 : nsTextNode::~nsTextNode()
     153                 : {
     154          292084 : }
     155                 : 
     156          466384 : NS_IMPL_ADDREF_INHERITED(nsTextNode, nsGenericDOMDataNode)
     157          466382 : NS_IMPL_RELEASE_INHERITED(nsTextNode, nsGenericDOMDataNode)
     158                 : 
     159            5170 : DOMCI_NODE_DATA(Text, nsTextNode)
     160                 : 
     161                 : // QueryInterface implementation for nsTextNode
     162         1670379 : NS_INTERFACE_TABLE_HEAD(nsTextNode)
     163         1670379 :   NS_NODE_INTERFACE_TABLE3(nsTextNode, nsIDOMNode, nsIDOMText,
     164                 :                            nsIDOMCharacterData)
     165         1638506 :   NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(nsTextNode)
     166          156222 :   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(Text)
     167          155845 : NS_INTERFACE_MAP_END_INHERITING(nsGenericDOMDataNode)
     168                 : 
     169                 : bool
     170          168686 : nsTextNode::IsNodeOfType(PRUint32 aFlags) const
     171                 : {
     172          168686 :   return !(aFlags & ~(eCONTENT | eTEXT | eDATA_NODE));
     173                 : }
     174                 : 
     175                 : nsGenericDOMDataNode*
     176             384 : nsTextNode::CloneDataNode(nsINodeInfo *aNodeInfo, bool aCloneText) const
     177                 : {
     178             768 :   nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
     179             768 :   nsTextNode *it = new nsTextNode(ni.forget());
     180             384 :   if (it && aCloneText) {
     181             382 :     it->mText = mText;
     182                 :   }
     183                 : 
     184             384 :   return it;
     185                 : }
     186                 : 
     187                 : nsresult
     188             984 : nsTextNode::BindToAttribute(nsIAttribute* aAttr)
     189                 : {
     190             984 :   NS_ASSERTION(!IsInDoc(), "Unbind before binding!");
     191             984 :   NS_ASSERTION(!GetNodeParent(), "Unbind before binding!");
     192             984 :   NS_ASSERTION(HasSameOwnerDoc(aAttr), "Wrong owner document!");
     193                 : 
     194             984 :   mParent = aAttr;
     195             984 :   SetParentIsContent(false);
     196             984 :   ClearInDocument();
     197             984 :   return NS_OK;
     198                 : }
     199                 : 
     200                 : nsresult
     201             984 : nsTextNode::UnbindFromAttribute()
     202                 : {
     203             984 :   NS_ASSERTION(GetNodeParent(), "Bind before unbinding!");
     204             984 :   NS_ASSERTION(GetNodeParent() &&
     205                 :                GetNodeParent()->IsNodeOfType(nsINode::eATTRIBUTE),
     206                 :                "Use this method only to unbind from an attribute!");
     207             984 :   mParent = nsnull;
     208             984 :   return NS_OK;
     209                 : }
     210                 : 
     211                 : nsresult
     212               9 : nsTextNode::AppendTextForNormalize(const PRUnichar* aBuffer, PRUint32 aLength,
     213                 :                                    bool aNotify, nsIContent* aNextSibling)
     214                 : {
     215                 :   CharacterDataChangeInfo::Details details = {
     216                 :     CharacterDataChangeInfo::Details::eMerge, aNextSibling
     217               9 :   };
     218               9 :   return SetTextInternal(mText.GetLength(), 0, aBuffer, aLength, aNotify, &details);
     219                 : }
     220                 : 
     221                 : #ifdef DEBUG
     222                 : void
     223               0 : nsTextNode::List(FILE* out, PRInt32 aIndent) const
     224                 : {
     225                 :   PRInt32 index;
     226               0 :   for (index = aIndent; --index >= 0; ) fputs("  ", out);
     227                 : 
     228               0 :   fprintf(out, "Text@%p", static_cast<const void*>(this));
     229               0 :   fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
     230               0 :   if (IsCommonAncestorForRangeInSelection()) {
     231                 :     typedef nsTHashtable<nsPtrHashKey<nsRange> > RangeHashTable;
     232                 :     RangeHashTable* ranges =
     233               0 :       static_cast<RangeHashTable*>(GetProperty(nsGkAtoms::range));
     234               0 :     fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0);
     235                 :   }
     236               0 :   fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
     237               0 :   fprintf(out, " refcount=%d<", mRefCnt.get());
     238                 : 
     239               0 :   nsAutoString tmp;
     240               0 :   ToCString(tmp, 0, mText.GetLength());
     241               0 :   fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
     242                 : 
     243               0 :   fputs(">\n", out);
     244               0 : }
     245                 : 
     246                 : void
     247               0 : nsTextNode::DumpContent(FILE* out, PRInt32 aIndent, bool aDumpAll) const
     248                 : {
     249               0 :   if(aDumpAll) {
     250                 :     PRInt32 index;
     251               0 :     for (index = aIndent; --index >= 0; ) fputs("  ", out);
     252                 : 
     253               0 :     nsAutoString tmp;
     254               0 :     ToCString(tmp, 0, mText.GetLength());
     255                 : 
     256               0 :     if(!tmp.EqualsLiteral("\\n")) {
     257               0 :       fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
     258               0 :       if(aIndent) fputs("\n", out);
     259                 :     }
     260                 :   }
     261               0 : }
     262                 : #endif
     263                 : 
     264                 : nsresult
     265               0 : NS_NewAttributeContent(nsNodeInfoManager *aNodeInfoManager,
     266                 :                        PRInt32 aNameSpaceID, nsIAtom* aAttrName,
     267                 :                        nsIContent** aResult)
     268                 : {
     269               0 :   NS_PRECONDITION(aNodeInfoManager, "Missing nodeInfoManager");
     270               0 :   NS_PRECONDITION(aAttrName, "Must have an attr name");
     271               0 :   NS_PRECONDITION(aNameSpaceID != kNameSpaceID_Unknown, "Must know namespace");
     272                 :   
     273               0 :   *aResult = nsnull;
     274                 : 
     275               0 :   nsCOMPtr<nsINodeInfo> ni = aNodeInfoManager->GetTextNodeInfo();
     276               0 :   if (!ni) {
     277               0 :     return NS_ERROR_OUT_OF_MEMORY;
     278                 :   }
     279                 : 
     280                 :   nsAttributeTextNode* textNode = new nsAttributeTextNode(ni.forget(),
     281                 :                                                           aNameSpaceID,
     282               0 :                                                           aAttrName);
     283               0 :   if (!textNode) {
     284               0 :     return NS_ERROR_OUT_OF_MEMORY;
     285                 :   }
     286                 : 
     287               0 :   NS_ADDREF(*aResult = textNode);
     288                 : 
     289               0 :   return NS_OK;
     290                 : }
     291                 : 
     292               0 : NS_IMPL_ISUPPORTS_INHERITED1(nsAttributeTextNode, nsTextNode,
     293                 :                              nsIMutationObserver)
     294                 : 
     295                 : nsresult
     296               0 : nsAttributeTextNode::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
     297                 :                                 nsIContent* aBindingParent,
     298                 :                                 bool aCompileEventHandlers)
     299                 : {
     300               0 :   NS_PRECONDITION(aParent && aParent->GetParent(),
     301                 :                   "This node can't be a child of the document or of the document root");
     302                 : 
     303                 :   nsresult rv = nsTextNode::BindToTree(aDocument, aParent,
     304               0 :                                        aBindingParent, aCompileEventHandlers);
     305               0 :   NS_ENSURE_SUCCESS(rv, rv);
     306                 : 
     307               0 :   NS_ASSERTION(!mGrandparent, "We were already bound!");
     308               0 :   mGrandparent = aParent->GetParent();
     309               0 :   mGrandparent->AddMutationObserver(this);
     310                 : 
     311                 :   // Note that there is no need to notify here, since we have no
     312                 :   // frame yet at this point.
     313               0 :   UpdateText(false);
     314                 : 
     315               0 :   return NS_OK;
     316                 : }
     317                 : 
     318                 : void
     319               0 : nsAttributeTextNode::UnbindFromTree(bool aDeep, bool aNullParent)
     320                 : {
     321                 :   // UnbindFromTree can be called anytime so we have to be safe.
     322               0 :   if (mGrandparent) {
     323                 :     // aNullParent might not be true here, but we want to remove the
     324                 :     // mutation observer anyway since we only need it while we're
     325                 :     // in the document.
     326               0 :     mGrandparent->RemoveMutationObserver(this);
     327               0 :     mGrandparent = nsnull;
     328                 :   }
     329               0 :   nsTextNode::UnbindFromTree(aDeep, aNullParent);
     330               0 : }
     331                 : 
     332                 : void
     333               0 : nsAttributeTextNode::AttributeChanged(nsIDocument* aDocument,
     334                 :                                       Element* aElement,
     335                 :                                       PRInt32 aNameSpaceID,
     336                 :                                       nsIAtom* aAttribute,
     337                 :                                       PRInt32 aModType)
     338                 : {
     339               0 :   if (aNameSpaceID == mNameSpaceID && aAttribute == mAttrName &&
     340                 :       aElement == mGrandparent) {
     341                 :     // Since UpdateText notifies, do it when it's safe to run script.  Note
     342                 :     // that if we get unbound while the event is up that's ok -- we'll just
     343                 :     // have no grandparent when it fires, and will do nothing.
     344               0 :     void (nsAttributeTextNode::*update)() = &nsAttributeTextNode::UpdateText;
     345               0 :     nsCOMPtr<nsIRunnable> ev = NS_NewRunnableMethod(this, update);
     346               0 :     nsContentUtils::AddScriptRunner(ev);
     347                 :   }
     348               0 : }
     349                 : 
     350                 : void
     351               0 : nsAttributeTextNode::NodeWillBeDestroyed(const nsINode* aNode)
     352                 : {
     353               0 :   NS_ASSERTION(aNode == static_cast<nsINode*>(mGrandparent), "Wrong node!");
     354               0 :   mGrandparent = nsnull;
     355               0 : }
     356                 : 
     357                 : void
     358               0 : nsAttributeTextNode::UpdateText(bool aNotify)
     359                 : {
     360               0 :   if (mGrandparent) {
     361               0 :     nsAutoString attrValue;
     362               0 :     mGrandparent->GetAttr(mNameSpaceID, mAttrName, attrValue);
     363               0 :     SetText(attrValue, aNotify);
     364                 :   }  
     365               0 : }

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