/* ==================================================================== Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for Additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 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. ==================================================================== */ /* ================================================================ * About NPOI * Author: Tony Qu * Author's email: tonyqus (at) gmail.com * Author's Blog: tonyqus.wordpress.com.cn (wp.tonyqus.cn) * HomePage: http://www.codeplex.com/npoi * Contributors: * * ==============================================================*/ using System; using System.Text; using System.Collections; using System.IO; using HH.WMS.Utils.NPOI.POIFS.FileSystem; namespace HH.WMS.Utils.NPOI.POIFS.Dev { /// /// This class contains methods used to inspect POIFSViewable objects /// @author Marc Johnson (mjohnson at apache dot org) /// public class POIFSViewEngine { /// /// Inspect an object that may be viewable, and drill down if told to /// /// the object to be viewed /// if true and the object implements POIFSViewable, inspect the objects' contents /// how far in to indent each string /// string to use for indenting /// a List of Strings holding the content public static IList InspectViewable(Object viewable, bool drilldown, int indentLevel, String indentString) { IList objects = new ArrayList(); if (viewable is DictionaryEntry) { ProcessViewable(((DictionaryEntry)viewable).Value, drilldown, indentLevel,indentString, objects); } else if (viewable is POIFSViewable) { ProcessViewable(viewable, drilldown, indentLevel,indentString, objects); } else { objects.Add(Indent(indentLevel, indentString, viewable.ToString())); } return objects; } internal static void ProcessViewable(object viewable, bool drilldown, int indentLevel, String indentString, IList objects) { POIFSViewable inspected = (POIFSViewable)viewable; objects.Add(Indent(indentLevel, indentString, inspected.ShortDescription)); if (drilldown) { if (inspected is POIFSDocument) { ((ArrayList)objects).AddRange(InspectViewable("POIFSDocument content is too long so ignored", drilldown, indentLevel + 1, indentString)); return; } if (inspected.PreferArray) { Array data = inspected.ViewableArray; for (int j = 0; j < data.Length; j++) { ((ArrayList)objects).AddRange(InspectViewable(data.GetValue(j), drilldown, indentLevel + 1, indentString)); } } else { IEnumerator iter = inspected.ViewableIterator; while (iter.MoveNext()) { ((ArrayList)objects).AddRange(InspectViewable(iter.Current, drilldown, indentLevel + 1, indentString)); } } } } /// /// Indents the specified indent level. /// /// how far in to indent each string /// string to use for indenting /// The data. /// private static String Indent(int indentLevel, String indentString, String data) { StringBuilder finalBuffer = new StringBuilder(); StringBuilder indentPrefix = new StringBuilder(); for (int j = 0; j < indentLevel; j++) { indentPrefix.Append(indentString); } using (StringReader reader = new StringReader(data)) { string line = reader.ReadLine(); while (line != null) { finalBuffer.Append(indentPrefix).Append(line).Append(Environment.NewLine); line = reader.ReadLine(); } return finalBuffer.ToString(); } } } }