91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="IfAction.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">Microsoft</owner>
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//------------------------------------------------------------------------------
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namespace System.Xml.Xsl.XsltOld {
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using Res = System.Xml.Utils.Res;
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using System;
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using System.Diagnostics;
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using System.Xml;
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using System.Xml.XPath;
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internal class IfAction : ContainerAction {
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internal enum ConditionType {
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ConditionIf,
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ConditionWhen,
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ConditionOtherwise
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}
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private ConditionType type;
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private int testKey = Compiler.InvalidQueryKey;
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internal IfAction(ConditionType type) {
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this.type = type;
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}
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internal override void Compile(Compiler compiler) {
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CompileAttributes(compiler);
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if (this.type != ConditionType.ConditionOtherwise) {
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CheckRequiredAttribute(compiler, this.testKey != Compiler.InvalidQueryKey, "test");
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}
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if (compiler.Recurse()) {
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CompileTemplate(compiler);
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compiler.ToParent();
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}
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}
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internal override bool CompileAttribute(Compiler compiler) {
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string name = compiler.Input.LocalName;
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string value = compiler.Input.Value;
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if (Ref.Equal(name, compiler.Atoms.Test)) {
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if (this.type == ConditionType.ConditionOtherwise) {
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return false;
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}
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this.testKey = compiler.AddBooleanQuery(value);
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}
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else {
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return false;
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}
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return true;
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}
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internal override void Execute(Processor processor, ActionFrame frame) {
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Debug.Assert(processor != null && frame != null);
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switch (frame.State) {
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case Initialized:
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if (this.type == ConditionType.ConditionIf || this.type == ConditionType.ConditionWhen) {
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Debug.Assert(this.testKey != Compiler.InvalidQueryKey);
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bool value = processor.EvaluateBoolean(frame, this.testKey);
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if (value == false) {
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frame.Finished();
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break;
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}
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}
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processor.PushActionFrame(frame);
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frame.State = ProcessingChildren;
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break; // Allow children to run
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case ProcessingChildren:
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if (this.type == ConditionType.ConditionWhen ||this.type == ConditionType.ConditionOtherwise) {
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Debug.Assert(frame.Container != null);
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frame.Exit();
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}
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frame.Finished();
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break;
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default:
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Debug.Fail("Invalid IfAction execution state");
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break;
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}
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}
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}
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}
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