mirror of https://github.com/grpc/grpc.git
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
233 lines
7.9 KiB
233 lines
7.9 KiB
<%@ Page Language="C#" EnableViewState="False" %> |
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<script runat="server"> |
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//=============================================================================================================== |
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// System : Sandcastle Help File Builder |
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// File : SearchHelp.aspx |
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// Author : Eric Woodruff (Eric@EWoodruff.us) |
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// Updated : 05/15/2014 |
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// Note : Copyright 2007-2015, Eric Woodruff, All rights reserved |
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// Compiler: Microsoft C# |
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// |
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// This file contains the code used to search for keywords within the help topics using the full-text index |
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// files created by the help file builder. |
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// |
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// This code is published under the Microsoft Public License (Ms-PL). A copy of the license should be |
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// distributed with the code. It can also be found at the project website: https://GitHub.com/EWSoftware/SHFB. This |
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// notice, the author's name, and all copyright notices must remain intact in all applications, documentation, |
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// and source files. |
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// |
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// Date Who Comments |
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// ============================================================================================================== |
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// 06/24/2007 EFW Created the code |
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// 02/17/2012 EFW Switched to JSON serialization to support websites that use something other than ASP.NET |
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// such as PHP. |
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// 05/15/2014 EFW Updated for use with the lightweight website presentation styles |
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//=============================================================================================================== |
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/// <summary> |
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/// This class is used to track the results and their rankings |
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/// </summary> |
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private class Ranking |
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{ |
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public string Filename, PageTitle; |
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public int Rank; |
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public Ranking(string file, string title, int rank) |
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{ |
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Filename = file; |
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PageTitle = title; |
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Rank = rank; |
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} |
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} |
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/// <summary> |
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/// Render the search results |
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/// </summary> |
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/// <param name="writer">The writer to which the results are written</param> |
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protected override void Render(HtmlTextWriter writer) |
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{ |
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JavaScriptSerializer jss = new JavaScriptSerializer(); |
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string searchText, ftiFile; |
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char letter; |
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bool sortByTitle = false; |
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jss.MaxJsonLength = Int32.MaxValue; |
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// The keywords for which to search should be passed in the query string |
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searchText = this.Request.QueryString["Keywords"]; |
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if(String.IsNullOrEmpty(searchText)) |
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{ |
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writer.Write("<strong>Nothing found</strong>"); |
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return; |
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} |
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// An optional SortByTitle option can also be specified |
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if(this.Request.QueryString["SortByTitle"] != null) |
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sortByTitle = Convert.ToBoolean(this.Request.QueryString["SortByTitle"]); |
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List<string> keywords = this.ParseKeywords(searchText); |
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List<char> letters = new List<char>(); |
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List<string> fileList; |
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Dictionary<string, List<long>> ftiWords, wordDictionary = new Dictionary<string,List<long>>(); |
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// Load the file index |
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using(StreamReader sr = new StreamReader(Server.MapPath("fti/FTI_Files.json"))) |
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{ |
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fileList = jss.Deserialize<List<string>>(sr.ReadToEnd()); |
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} |
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// Load the required word index files |
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foreach(string word in keywords) |
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{ |
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letter = word[0]; |
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if(!letters.Contains(letter)) |
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{ |
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letters.Add(letter); |
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ftiFile = Server.MapPath(String.Format(CultureInfo.InvariantCulture, "fti/FTI_{0}.json", (int)letter)); |
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if(File.Exists(ftiFile)) |
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{ |
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using(StreamReader sr = new StreamReader(ftiFile)) |
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{ |
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ftiWords = jss.Deserialize<Dictionary<string, List<long>>>(sr.ReadToEnd()); |
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} |
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foreach(string ftiWord in ftiWords.Keys) |
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wordDictionary.Add(ftiWord, ftiWords[ftiWord]); |
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} |
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} |
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} |
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// Perform the search and return the results as a block of HTML |
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writer.Write(this.Search(keywords, fileList, wordDictionary, sortByTitle)); |
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} |
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/// <summary> |
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/// Split the search text up into keywords |
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/// </summary> |
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/// <param name="keywords">The keywords to parse</param> |
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/// <returns>A list containing the words for which to search</returns> |
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private List<string> ParseKeywords(string keywords) |
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{ |
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List<string> keywordList = new List<string>(); |
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string checkWord; |
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string[] words = Regex.Split(keywords, @"\W+"); |
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foreach(string word in words) |
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{ |
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checkWord = word.ToLower(CultureInfo.InvariantCulture); |
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if(checkWord.Length > 2 && !Char.IsDigit(checkWord[0]) && !keywordList.Contains(checkWord)) |
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keywordList.Add(checkWord); |
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} |
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return keywordList; |
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} |
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/// <summary> |
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/// Search for the specified keywords and return the results as a block of HTML |
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/// </summary> |
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/// <param name="keywords">The keywords for which to search</param> |
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/// <param name="fileInfo">The file list</param> |
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/// <param name="wordDictionary">The dictionary used to find the words</param> |
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/// <param name="sortByTitle">True to sort by title, false to sort by ranking</param> |
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/// <returns>A block of HTML representing the search results</returns> |
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private string Search(List<string> keywords, List<string> fileInfo, |
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Dictionary<string, List<long>> wordDictionary, bool sortByTitle) |
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{ |
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StringBuilder sb = new StringBuilder(10240); |
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Dictionary<string, List<long>> matches = new Dictionary<string, List<long>>(); |
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List<long> occurrences; |
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List<int> matchingFileIndices = new List<int>(), occurrenceIndices = new List<int>(); |
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List<Ranking> rankings = new List<Ranking>(); |
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string filename, title; |
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string[] fileIndex; |
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bool isFirst = true; |
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int idx, wordCount, matchCount; |
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foreach(string word in keywords) |
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{ |
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if(!wordDictionary.TryGetValue(word, out occurrences)) |
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return "<strong>Nothing found</strong>"; |
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matches.Add(word, occurrences); |
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occurrenceIndices.Clear(); |
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// Get a list of the file indices for this match |
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foreach(long entry in occurrences) |
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occurrenceIndices.Add((int)(entry >> 16)); |
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if(isFirst) |
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{ |
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isFirst = false; |
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matchingFileIndices.AddRange(occurrenceIndices); |
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} |
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else |
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{ |
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// After the first match, remove files that do not appear for |
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// all found keywords. |
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for(idx = 0; idx < matchingFileIndices.Count; idx++) |
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if(!occurrenceIndices.Contains(matchingFileIndices[idx])) |
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{ |
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matchingFileIndices.RemoveAt(idx); |
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idx--; |
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} |
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} |
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} |
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if(matchingFileIndices.Count == 0) |
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return "<strong>Nothing found</strong>"; |
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// Rank the files based on the number of times the words occurs |
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foreach(int index in matchingFileIndices) |
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{ |
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// Split out the title, filename, and word count |
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fileIndex = fileInfo[index].Split('\x0'); |
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title = fileIndex[0]; |
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filename = fileIndex[1]; |
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wordCount = Convert.ToInt32(fileIndex[2]); |
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matchCount = 0; |
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foreach(string word in keywords) |
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{ |
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occurrences = matches[word]; |
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foreach(long entry in occurrences) |
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if((int)(entry >> 16) == index) |
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matchCount += (int)(entry & 0xFFFF); |
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} |
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rankings.Add(new Ranking(filename, title, matchCount * 1000 / wordCount)); |
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if(rankings.Count > 99) |
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break; |
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} |
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// Sort by rank in descending order or by page title in ascending order |
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rankings.Sort(delegate (Ranking x, Ranking y) |
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{ |
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if(!sortByTitle) |
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return y.Rank - x.Rank; |
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return x.PageTitle.CompareTo(y.PageTitle); |
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}); |
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// Format the file list and return the results |
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sb.Append("<ol>"); |
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foreach(Ranking r in rankings) |
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sb.AppendFormat("<li><a href=\"{0}\" target=\"_blank\">{1}</a></li>", r.Filename, r.PageTitle); |
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sb.Append("</ol>"); |
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if(rankings.Count < matchingFileIndices.Count) |
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sb.AppendFormat("<p>Omitted {0} more results</p>", matchingFileIndices.Count - rankings.Count); |
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return sb.ToString(); |
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} |
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</script>
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