--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/templates/TemplateContext.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,122 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.text.templates.TemplateContext;
+
+import dwt.dwthelper.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import dwtx.jface.text.BadLocationException;
+
+/**
+ * Provides the context for a <code>Template</code> being resolved. Keeps track
+ * of resolved variables.
+ * <p>
+ * Clients may extend this class.
+ * </p>
+ *
+ * @since 3.0
+ */
+public abstract class TemplateContext {
+
+    /** The context type of this context */
+    private final TemplateContextType fContextType;
+    /** Additional variables. */
+    private final Map fVariables= new HashMap();
+    /** A flag to indicate that the context should not be modified. */
+    private bool fReadOnly;
+
+    /**
+     * Creates a template context of a particular context type.
+     *
+     * @param contextType the context type of this context
+     */
+    protected TemplateContext(TemplateContextType contextType) {
+        fContextType= contextType;
+        fReadOnly= true;
+    }
+
+    /**
+     * Returns the context type of this context.
+     *
+     * @return the context type of this context
+     */
+    public TemplateContextType getContextType() {
+        return fContextType;
+    }
+
+    /**
+     * Sets or clears the read-only flag.
+     *
+     * @param readOnly the new read-only state
+     */
+    public void setReadOnly(bool readOnly) {
+        fReadOnly= readOnly;
+    }
+
+    /**
+     * Returns <code>true</code> if the receiver is read-only, <code>false</code> otherwise.
+     *
+     * @return <code>true</code> if the receiver is read-only, <code>false</code> otherwise
+     */
+    public bool isReadOnly() {
+        return fReadOnly;
+    }
+
+    /**
+     * Defines the value of a variable.
+     *
+     * @param name the name of the variable
+     * @param value the value of the variable, <code>null</code> to un-define a variable
+     */
+    public void setVariable(String name, String value) {
+        fVariables.put(name, value);
+    }
+
+    /**
+     * Returns the value of a defined variable.
+     *
+     * @param name the name of the variable
+     * @return returns the value of the variable, <code>null</code> if the variable was not defined
+     */
+    public String getVariable(String name) {
+        return (String) fVariables.get(name);
+    }
+
+    /**
+     * Evaluates the template in this context and returns a template buffer.
+     * <p>
+     * Evaluation means translating the template into a <code>TemplateBuffer</code>,
+     * resolving the defined variables in this context and possibly formatting
+     * the resolved buffer.</p>
+     *
+     * @param template the template to evaluate
+     * @return returns the buffer with the evaluated template or <code>null</code> if the buffer could not be created
+     * @throws BadLocationException if evaluation fails due to concurrently changed documents etc.
+     * @throws TemplateException if the template specification is not valid
+     */
+    public abstract TemplateBuffer evaluate(Template template) throws BadLocationException, TemplateException;
+
+    /**
+     * Tests if the specified template can be evaluated in this context.
+     * <p>Examples are templates defined for a different context (e.g. a javadoc
+     * template cannot be evaluated in Java context).</p>
+     *
+     * @param template the <code>Template</code> to check
+     * @return <code>true</code> if <code>template</code> can be evaluated
+     *         in this context, <code>false</code> otherwise
+     */
+    public abstract bool canEvaluate(Template template);
+
+}