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lightning-sunbird  0.9+nobinonly
nsContentTagTestNode.cpp
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Chris Waterson <waterson@netscape.com>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsContentTagTestNode.h"
00040 #include "nsISupportsArray.h"
00041 #include "nsString.h"
00042 
00043 #include "prlog.h"
00044 #ifdef PR_LOGGING
00045 extern PRLogModuleInfo* gXULTemplateLog;
00046 #endif
00047 
00048 nsContentTagTestNode::nsContentTagTestNode(InnerNode* aParent,
00049                                            nsConflictSet& aConflictSet,
00050                                            PRInt32 aContentVariable,
00051                                            nsIAtom* aTag)
00052     : TestNode(aParent),
00053       mConflictSet(aConflictSet),
00054       mContentVariable(aContentVariable),
00055       mTag(aTag)
00056 {
00057 #ifdef PR_LOGGING
00058     if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
00059         nsAutoString tag(NS_LITERAL_STRING("(none)"));
00060         if (mTag)
00061             mTag->ToString(tag);
00062 
00063         PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
00064                ("nsContentTagTestNode[%p]: parent=%p content-var=%d tag=%s",
00065                 this, aParent, aContentVariable, NS_ConvertUCS2toUTF8(tag).get()));
00066     }
00067 #endif
00068 }
00069 
00070 nsresult
00071 nsContentTagTestNode::FilterInstantiations(InstantiationSet& aInstantiations, void* aClosure) const
00072 {
00073     nsresult rv;
00074 
00075     nsCOMPtr<nsISupportsArray> elements;
00076     rv = NS_NewISupportsArray(getter_AddRefs(elements));
00077     if (NS_FAILED(rv)) return rv;
00078 
00079     InstantiationSet::Iterator last = aInstantiations.Last();
00080     for (InstantiationSet::Iterator inst = aInstantiations.First(); inst != last; ++inst) {
00081         Value value;
00082         if (! inst->mAssignments.GetAssignmentFor(mContentVariable, &value)) {
00083            // NS_ERROR("cannot handle open-ended tag name query");
00084             return NS_ERROR_UNEXPECTED;
00085         }
00086 
00087         if (VALUE_TO_ICONTENT(value)->Tag() != mTag) {
00088             aInstantiations.Erase(inst--);
00089         }
00090     }
00091     
00092     return NS_OK;
00093 }
00094 
00095 nsresult
00096 nsContentTagTestNode::GetAncestorVariables(VariableSet& aVariables) const
00097 {
00098     return NS_OK;
00099 }
00100