/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for Additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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/* ================================================================
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* About NPOI
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* Author: Tony Qu
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* Author's email: tonyqus (at) gmail.com
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* Author's Blog: tonyqus.wordpress.com.cn (wp.tonyqus.cn)
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* HomePage: http://www.codeplex.com/npoi
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* Contributors:
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*
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* ==============================================================*/
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using System;
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using System.Text;
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using System.Collections;
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using System.IO;
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using HH.WMS.Utils.NPOI.POIFS.FileSystem;
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namespace HH.WMS.Utils.NPOI.POIFS.Dev
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{
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/// <summary>
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/// This class contains methods used to inspect POIFSViewable objects
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/// @author Marc Johnson (mjohnson at apache dot org)
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/// </summary>
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public class POIFSViewEngine
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{
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/// <summary>
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/// Inspect an object that may be viewable, and drill down if told to
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/// </summary>
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/// <param name="viewable">the object to be viewed</param>
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/// <param name="drilldown">if <c>true</c> and the object implements POIFSViewable, inspect the objects' contents</param>
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/// <param name="indentLevel">how far in to indent each string</param>
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/// <param name="indentString">string to use for indenting</param>
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/// <returns>a List of Strings holding the content</returns>
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public static IList InspectViewable(Object viewable,
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bool drilldown,
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int indentLevel,
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String indentString)
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{
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IList objects = new ArrayList();
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if (viewable is DictionaryEntry)
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{
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ProcessViewable(((DictionaryEntry)viewable).Value, drilldown, indentLevel,indentString, objects);
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}
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else if (viewable is POIFSViewable)
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{
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ProcessViewable(viewable, drilldown, indentLevel,indentString, objects);
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}
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else
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{
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objects.Add(Indent(indentLevel, indentString,
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viewable.ToString()));
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}
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return objects;
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}
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internal static void ProcessViewable(object viewable,
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bool drilldown,
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int indentLevel,
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String indentString,
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IList objects)
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{
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POIFSViewable inspected = (POIFSViewable)viewable;
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objects.Add(Indent(indentLevel, indentString,
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inspected.ShortDescription));
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if (drilldown)
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{
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if (inspected is POIFSDocument)
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{
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((ArrayList)objects).AddRange(InspectViewable("POIFSDocument content is too long so ignored", drilldown,
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indentLevel + 1,
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indentString));
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return;
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}
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if (inspected.PreferArray)
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{
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Array data = inspected.ViewableArray;
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for (int j = 0; j < data.Length; j++)
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{
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((ArrayList)objects).AddRange(InspectViewable(data.GetValue(j), drilldown,
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indentLevel + 1,
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indentString));
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}
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}
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else
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{
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IEnumerator iter = inspected.ViewableIterator;
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while (iter.MoveNext())
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{
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((ArrayList)objects).AddRange(InspectViewable(iter.Current,
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drilldown,
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indentLevel + 1,
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indentString));
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}
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}
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}
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}
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/// <summary>
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/// Indents the specified indent level.
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/// </summary>
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/// <param name="indentLevel">how far in to indent each string</param>
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/// <param name="indentString">string to use for indenting</param>
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/// <param name="data">The data.</param>
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/// <returns></returns>
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private static String Indent(int indentLevel,
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String indentString, String data)
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{
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StringBuilder finalBuffer = new StringBuilder();
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StringBuilder indentPrefix = new StringBuilder();
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for (int j = 0; j < indentLevel; j++)
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{
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indentPrefix.Append(indentString);
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}
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using (StringReader reader = new StringReader(data))
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{
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string line = reader.ReadLine();
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while (line != null)
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{
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finalBuffer.Append(indentPrefix).Append(line).Append(Environment.NewLine);
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line = reader.ReadLine();
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}
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return finalBuffer.ToString();
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}
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}
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}
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}
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