Improved HTML parsing

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/html/ast/EmbeddedExpression.java

+/*
+ * Copyright (c) 2013, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.dart.engine.html.ast;
+
+import com.google.dart.engine.ast.Expression;
+
+/**
+ * Instances of the class {@code EmbeddedExpression} represent an expression enclosed between
+ * <code>{{</code> and <code>}}</code> delimiters.
+ */
+public class EmbeddedExpression {
+  /**
+   * The offset of the first character of the opening delimiter.
+   */
+  private int openingOffset;
+
+  /**
+   * The expression that is enclosed between the delimiters.
+   */
+  private Expression expression;
+
+  /**
+   * The offset of the first character of the closing delimiter.
+   */
+  private int closingOffset;
+
+  /**
+   * An empty array of embedded expressions.
+   */
+  public static final EmbeddedExpression[] EMPTY_ARRAY = new EmbeddedExpression[0];
+
+  /**
+   * Initialize a newly created embedded expression to represent the given expression.
+   * 
+   * @param openingOffset the offset of the first character of the opening delimiter
+   * @param expression the expression that is enclosed between the delimiters
+   * @param closingOffset the offset of the first character of the closing delimiter
+   */
+  public EmbeddedExpression(int openingOffset, Expression expression, int closingOffset) {
+    this.openingOffset = openingOffset;
+    this.expression = expression;
+    this.closingOffset = closingOffset;
+  }
+
+  /**
+   * Return the offset of the first character of the closing delimiter.
+   * 
+   * @return the offset of the first character of the closing delimiter
+   */
+  public int getClosingOffset() {
+    return closingOffset;
+  }
+
+  /**
+   * Return the expression that is enclosed between the delimiters.
+   * 
+   * @return the expression that is enclosed between the delimiters
+   */
+  public Expression getExpression() {
+    return expression;
+  }
+
+  /**
+   * Return the offset of the first character of the opening delimiter.
+   * 
+   * @return the offset of the first character of the opening delimiter
+   */
+  public int getOpeningOffset() {
+    return openingOffset;
+  }
+}