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1 package net.sf.saxon.style;
2 import net.sf.saxon.expr.Expression;
3 import net.sf.saxon.instruct.Executable;
4 import net.sf.saxon.om.*;
5 import net.sf.saxon.pattern.*;
6 import net.sf.saxon.trans.Mode;
7 import net.sf.saxon.trans.XPathException;
8 import net.sf.saxon.type.Type;
9
10 import javax.xml.transform.TransformerConfigurationException  ;
11 import java.util.StringTokenizer ;
12
13
16
17 public class XSLPreserveSpace extends StyleElement {
18
19 private String elements;
20
21 public void prepareAttributes() throws XPathException {
22
23 AttributeCollection atts = getAttributeList();
24
25 for (int a=0; a<atts.getLength(); a++) {
26 int nc = atts.getNameCode(a);
27 String f = getNamePool().getClarkName(nc);
28 if (f==StandardNames.ELEMENTS) {
29 elements = atts.getValue(a);
30 } else {
31 checkUnknownAttribute(nc);
32 }
33 }
34 if (elements==null) {
35 reportAbsence("elements");
36 elements="*"; }
38 }
39
40 public void validate() throws XPathException {
41 checkTopLevel(null);
42 }
43
44 public Expression compile(Executable exec) throws XPathException
45 {
46 Boolean preserve = Boolean.valueOf(getFingerprint() == StandardNames.XSL_PRESERVE_SPACE);
47 Mode stripperRules = getPrincipalStylesheet().getStripperRules();
48
49
51 StringTokenizer st = new StringTokenizer (elements);
52 while (st.hasMoreTokens()) {
53 String s = st.nextToken();
54 NodeTestPattern pat = new NodeTestPattern();
55 pat.setOriginalText(s);
57 pat.setSystemId(getSystemId());
58 pat.setLineNumber(getLineNumber());
59 NodeTest nt;
60 if (s.equals("*")) {
61 nt = AnyNodeTest.getInstance();
62 pat.setNodeTest(nt);
63 stripperRules.addRule(
64 pat,
65 preserve,
66 getPrecedence(),
67 -0.5);
68
69 } else if (s.endsWith(":*")) {
70 if (s.length()==2) {
71 compileError("No prefix before ':*'");
72 }
73 String prefix = s.substring(0, s.length()-2);
74 String uri = getURIForPrefix(prefix, false);
75 nt = new NamespaceTest(
76 getTargetNamePool(),
77 Type.ELEMENT,
78 uri);
79 pat.setNodeTest(nt);
80 stripperRules.addRule(
81 pat,
82 preserve,
83 getPrecedence(),
84 -0.25);
85 } else if (s.startsWith("*:")) {
86 if (s.length()==2) {
87 compileError("No local name after '*:'");
88 }
89 String localname = s.substring(2);
90 nt = new LocalNameTest(
91 getTargetNamePool(),
92 Type.ELEMENT,
93 localname);
94 pat.setNodeTest(nt);
95 stripperRules.addRule(
96 pat,
97 preserve,
98 getPrecedence(),
99 -0.25);
100 } else {
101 String prefix;
102 String localName = null;
103 String uri = null;
104 try {
105 String [] parts = Name.getQNameParts(s);
106 prefix = parts[0];
107 uri = getURIForPrefix(prefix, false);
108 if (uri == null) {
109 undeclaredNamespaceError(prefix, "XTSE0280");
110 return null;
111 }
112 localName = parts[1];
113 } catch (QNameException err) {
114 compileError("Element name " + s + " is not a valid QName", "XTSE0280");
115 return null;
116 }
117 NamePool target = getTargetNamePool();
118 int nameCode = target.allocate("", uri, localName);
119 nt = new NameTest(Type.ELEMENT, nameCode, getNamePool());
120 pat.setNodeTest(nt);
121 stripperRules.addRule(
122 pat,
123 preserve,
124 getPrecedence(),
125 0);
126 }
127
128 }
129 return null;
130 }
131
132 }
133
134 |
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