gerrit.simantics Code Review - simantics/platform.git/blob

   1 package org.simantics.scl.compiler.markdown.html;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.StringReader;
   6 import java.nio.charset.Charset;
   7 import java.util.Arrays;
   8 import java.util.List;
   9
  10 import org.simantics.scl.compiler.errors.Failable;
  11 import org.simantics.scl.compiler.markdown.internal.MarkdownParser;
  12 import org.simantics.scl.compiler.markdown.nodes.HeaderNode;
  13 import org.simantics.scl.compiler.markdown.nodes.Node;
  14 import org.simantics.scl.compiler.module.Module;
  15 import org.simantics.scl.compiler.module.repository.ModuleRepository;
  16
  17 public class HtmlDocumentationGeneration {
  18
  19     private static String STYLESHEET;
  20     static {
  21         try {
  22             InputStream stream = HtmlDocumentationGeneration.class.getResourceAsStream("SclDoc.css");
  23             try {
  24                 byte[] buffer = new byte[2048];
  25                 int pos = 0;
  26                 while(true) {
  27                     int count = stream.read(buffer, pos, buffer.length-pos);
  28                     if(count <= 0)
  29                         break;
  30                     pos += count;
  31                     if(pos == buffer.length)
  32                         buffer = Arrays.copyOf(buffer, 2*buffer.length);
  33                 }
  34                 STYLESHEET = new String(buffer, Charset.forName("UTF-8"));
  35             } finally {
  36                 stream.close();
  37             }
  38         } catch(IOException e) {
  39             e.printStackTrace();
  40         }
  41     }
  42
  43     public static String generate(ModuleRepository moduleRepository, String documentationName, String navigation) {
  44         String documentation = moduleRepository.getDocumentation(documentationName);
  45         if(documentation == null || documentation.isEmpty()) {
  46             Failable<Module> module = moduleRepository.getModule(documentationName);
  47             if(!module.didSucceed())
  48                 return "Didn't find documentation or module for " + documentationName + ".";
  49             documentation = "# Module "+documentationName+"\n\nThis module is undocumented. This is a list of its definitions.\n\n::undocumented[]";
  50         }
  51         MarkdownParser parser = new MarkdownParser();
  52         try {
  53             Node result = parser.parseDocument(new StringReader(documentation));
  54             result.processExtensionNodes(new SCLDocumentationExtensionNodeHandler(moduleRepository, documentationName));
  55
  56             StringBuilder b = new StringBuilder();
  57             addHTMLHeader(b);
  58
  59             if(navigation != null) {
  60                 b.append("<table class=\"pagestructure\"><tr><td class=\"navi\">\n");
  61                 b.append(navigation);
  62                 b.append("</td><td class=\"content\">\n");
  63             }
  64             addContentsTree(b, result);
  65             result.toHtml(b);
  66             if(navigation != null)
  67                 b.append("</td></tr></table>\n");
  68
  69             addHTMLFooter(b);
  70
  71             return b.toString();
  72         } catch (IOException e) {
  73             e.printStackTrace();
  74             return "";
  75         }
  76     }
  77
  78     private static void addContentsTree(StringBuilder b, Node node) {
  79         List<HeaderNode> headers = node.extractHeaders();
  80         if(headers.size() > 1) {
  81             int minLevel=Integer.MAX_VALUE, minLevelCount=0;
  82             for(HeaderNode header : headers) {
  83                 if(header.level == minLevel)
  84                     ++minLevelCount;
  85                 else if(header.level < minLevel) {
  86                     minLevel = header.level;
  87                     minLevelCount = 1;
  88                 }
  89             }
  90             if(minLevelCount == 1)
  91                 ++minLevel;
  92
  93             b.append("<div id=\"contentspanel\">");
  94             b.append("<h2>Contents</h2>\n");
  95             int level = minLevel-1;
  96             for(HeaderNode header : headers) {
  97                 if(header.level < minLevel)
  98                     continue;
  99                 while(header.level != level) {
 100                     if(header.level > level) {
 101                         b.append("<ul>\n");
 102                         ++level;
 103                     }
 104                     else {
 105                         b.append("</ul>\n");
 106                         --level;
 107                     }
 108                 }
 109
 110                 b.append("<li><a href=\"#");
 111                 header.toPlainText(b);
 112                 b.append("\">");
 113                 header.toPlainText(b);
 114                 b.append("</a></li>\n");
 115             }
 116             while(level >= minLevel) {
 117                 b.append("</ul>\n");
 118                 --level;
 119             }
 120             b.append("</div>");
 121         }
 122     }
 123
 124     private static void addHTMLHeader(StringBuilder b) {
 125         b.append("<!DOCTYPE html>\n");
 126         b.append("<html>\n");
 127         b.append("<head>\n");
 128         b.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n");
 129         b.append("<meta http-equiv=\"x-ua-compatible\" content=\"IE=Edge\" />\n");
 130         /*b.append("<script type=\"text/javascript\"\n");
 131         b.append("  src=\"https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML\">\n");
 132         b.append("</script>\n");*/
 133         b.append("<style type=\"text/css\">\n");
 134         b.append(STYLESHEET);
 135         b.append("</style>\n");
 136         b.append("</head>\n");
 137         b.append("<body>\n");
 138     }
 139
 140     private static void addHTMLFooter(StringBuilder b) {
 141         b.append("</body>\n");
 142         b.append("</html>\n");
 143     }
 144 }