1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
//------------------------------------------------------------------------------
// <copyright file="IfAction.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Xml.Xsl.XsltOld {
using Res = System.Xml.Utils.Res;
using System;
using System.Diagnostics;
using System.Xml;
using System.Xml.XPath;
internal class IfAction : ContainerAction {
internal enum ConditionType {
ConditionIf,
ConditionWhen,
ConditionOtherwise
}
private ConditionType type;
private int testKey = Compiler.InvalidQueryKey;
internal IfAction(ConditionType type) {
this.type = type;
}
internal override void Compile(Compiler compiler) {
CompileAttributes(compiler);
if (this.type != ConditionType.ConditionOtherwise) {
CheckRequiredAttribute(compiler, this.testKey != Compiler.InvalidQueryKey, "test");
}
if (compiler.Recurse()) {
CompileTemplate(compiler);
compiler.ToParent();
}
}
internal override bool CompileAttribute(Compiler compiler) {
string name = compiler.Input.LocalName;
string value = compiler.Input.Value;
if (Ref.Equal(name, compiler.Atoms.Test)) {
if (this.type == ConditionType.ConditionOtherwise) {
return false;
}
this.testKey = compiler.AddBooleanQuery(value);
}
else {
return false;
}
return true;
}
internal override void Execute(Processor processor, ActionFrame frame) {
Debug.Assert(processor != null && frame != null);
switch (frame.State) {
case Initialized:
if (this.type == ConditionType.ConditionIf || this.type == ConditionType.ConditionWhen) {
Debug.Assert(this.testKey != Compiler.InvalidQueryKey);
bool value = processor.EvaluateBoolean(frame, this.testKey);
if (value == false) {
frame.Finished();
break;
}
}
processor.PushActionFrame(frame);
frame.State = ProcessingChildren;
break; // Allow children to run
case ProcessingChildren:
if (this.type == ConditionType.ConditionWhen ||this.type == ConditionType.ConditionOtherwise) {
Debug.Assert(frame.Container != null);
frame.Exit();
}
frame.Finished();
break;
default:
Debug.Fail("Invalid IfAction execution state");
break;
}
}
}
}
|
