[358] | 1 | /*
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| 2 | * Copyright 2002,2004 The Apache Software Foundation.
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 |
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| 17 | /*
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| 18 | * $Id: DOMPrintFilter.cpp,v 1.4 2004/09/08 13:55:31 peiyongz Exp $
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| 19 | * $Log: DOMPrintFilter.cpp,v $
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| 20 | * Revision 1.4 2004/09/08 13:55:31 peiyongz
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| 21 | * Apache License Version 2.0
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| 22 | *
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| 23 | * Revision 1.3 2002/06/04 14:22:51 peiyongz
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| 24 | * Implement setter/getter from DOMWriterFilter
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| 25 | *
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| 26 | * Revision 1.2 2002/06/03 22:40:07 peiyongz
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| 27 | * *** empty log message ***
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| 28 | *
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| 29 | * Revision 1.1 2002/05/29 13:33:32 peiyongz
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| 30 | * DOM3 Save Interface: DOMWriter/DOMWriterFilter
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| 31 | *
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| 32 | */
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| 33 |
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| 34 | #include "DOMPrintFilter.hpp"
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| 35 | #include <xercesc/util/XMLUniDefs.hpp>
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| 36 | #include <xercesc/util/XMLString.hpp>
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| 37 |
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| 38 | static const XMLCh element_person[]=
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| 39 | {
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| 40 | chLatin_p, chLatin_e, chLatin_r, chLatin_s, chLatin_o, chLatin_n, chNull
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| 41 | };
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| 42 |
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| 43 | static const XMLCh element_link[]=
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| 44 | {
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| 45 | chLatin_l, chLatin_i, chLatin_n, chLatin_k, chNull
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| 46 | };
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| 47 |
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| 48 | DOMPrintFilter::DOMPrintFilter(unsigned long whatToShow)
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| 49 | :fWhatToShow(whatToShow)
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| 50 | {}
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| 51 |
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| 52 | short DOMPrintFilter::acceptNode(const DOMNode* node) const
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| 53 | {
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| 54 | //
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| 55 | // The DOMWriter shall call getWhatToShow() before calling
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| 56 | // acceptNode(), to show nodes which are supposed to be
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| 57 | // shown to this filter.
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| 58 | //
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| 59 | // REVISIT: In case the DOMWriter does not follow the protocol,
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| 60 | // Shall the filter honour, or NOT, what it claimes
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| 61 | // (when it is constructed/setWhatToShow())
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| 62 | // it is interested in ?
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| 63 | //
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| 64 | // The DOMLS specs does not specify that acceptNode() shall do
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| 65 | // this way, or not, so it is up the implementation,
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| 66 | // to skip the code below for the sake of performance ...
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| 67 | //
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| 68 | if ((getWhatToShow() & (1 << (node->getNodeType() - 1))) == 0)
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| 69 | return DOMNodeFilter::FILTER_ACCEPT;
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| 70 |
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| 71 | switch (node->getNodeType())
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| 72 | {
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| 73 | case DOMNode::ELEMENT_NODE:
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| 74 | {
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| 75 | // for element whose name is "person", skip it
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| 76 | if (XMLString::compareString(node->getNodeName(), element_person)==0)
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| 77 | return DOMNodeFilter::FILTER_SKIP;
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| 78 | // for element whose name is "line", reject it
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| 79 | if (XMLString::compareString(node->getNodeName(), element_link)==0)
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| 80 | return DOMNodeFilter::FILTER_REJECT;
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| 81 | // for rest, accept it
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| 82 | return DOMNodeFilter::FILTER_ACCEPT;
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| 83 |
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| 84 | break;
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| 85 | }
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| 86 | case DOMNode::COMMENT_NODE:
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| 87 | {
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| 88 | // the WhatToShow will make this no effect
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| 89 | return DOMNodeFilter::FILTER_REJECT;
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| 90 | break;
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| 91 | }
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| 92 | case DOMNode::TEXT_NODE:
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| 93 | {
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| 94 | // the WhatToShow will make this no effect
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| 95 | return DOMNodeFilter::FILTER_REJECT;
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| 96 | break;
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| 97 | }
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| 98 | case DOMNode::DOCUMENT_TYPE_NODE:
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| 99 | {
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| 100 | // even we say we are going to process document type,
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| 101 | // we are not able be to see this node since
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| 102 | // DOMWriterImpl (a XercesC's default implementation
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| 103 | // of DOMWriter) will not pass DocumentType node to
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| 104 | // this filter.
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| 105 | //
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| 106 | return DOMNodeFilter::FILTER_REJECT; // no effect
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| 107 | break;
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| 108 | }
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| 109 | case DOMNode::DOCUMENT_NODE:
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| 110 | {
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| 111 | // same as DOCUMENT_NODE
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| 112 | return DOMNodeFilter::FILTER_REJECT; // no effect
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| 113 | break;
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| 114 | }
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| 115 | default :
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| 116 | {
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| 117 | return DOMNodeFilter::FILTER_ACCEPT;
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| 118 | break;
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | return DOMNodeFilter::FILTER_ACCEPT;
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| 123 | }
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| 124 |
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