debuggablescript.java

這是一個javascript 的 interpreter是了解 web browser的好材料

/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1999.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1997-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Norris Boyd
 *   Igor Bukanov
 *
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 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
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// API class

package org.mozilla.javascript.debug;

/**
 * This interface exposes debugging information from executable
 * code (either functions or top-level scripts).
 */
public interface DebuggableScript
{
    public boolean isTopLevel();

    /**
     * Returns true if this is a function, false if it is a script.
     */
    public boolean isFunction();

    /**
     * Get name of the function described by this script.
     * Return null or an empty string if this script is not a function.
     */
    public String getFunctionName();

    /**
     * Get number of declared parameters in the function.
     * Return 0 if this script is not a function.
     *
     * @see #getParamAndVarCount()
     * @see #getParamOrVarName(int index)
     */
    public int getParamCount();

    /**
     * Get number of declared parameters and local variables.
     * Return number of declared global variables if this script is not a
     * function.
     *
     * @see #getParamCount()
     * @see #getParamOrVarName(int index)
     */
    public int getParamAndVarCount();

    /**
     * Get name of a declared parameter or local variable.
     * <tt>index</tt> should be less then {@link #getParamAndVarCount()}.
     * If <tt>index&nbsp;&lt;&nbsp;{@link #getParamCount()}</tt>, return
     * the name of the corresponding parameter, otherwise return the name
     * of variable.
     * If this script is not function, return the name of the declared
     * global variable.
     */
    public String getParamOrVarName(int index);

    /**
     * Get the name of the source (usually filename or URL)
     * of the script.
     */
    public String getSourceName();

    /**
     * Returns true if this script or function were runtime-generated
     * from JavaScript using <tt>eval</tt> function or <tt>Function</tt>
     * or <tt>Script</tt> constructors.
     */
    public boolean isGeneratedScript();

    /**
     * Get array containing the line numbers that
     * that can be passed to <code>DebugFrame.onLineChange()<code>.
     * Note that line order in the resulting array is arbitrary
     */
    public int[] getLineNumbers();

    public int getFunctionCount();

    public DebuggableScript getFunction(int index);

    public DebuggableScript getParent();

}