support for multiple regions with the same name

public/doc-shredder/_test/gulpfile.js

@@ -7,13 +7,13 @@ var taskListing = require('gulp-task-listing');
 var docShredder = require('../doc-shredder');
 
 var shredOptions =  {
-  examplesDir: "test_source",
+  examplesDir: "test_source/foo",
   fragmentsDir:  "test_fragments"
 };
 
 gulp.task('help', taskListing);
 
-gulp.task('shred', function() {
+gulp.task('shred', ['clean'], function() {
   return docShredder.shred(shredOptions);
 });
 

public/doc-shredder/_test/test_source/foo/main2.ts

@@ -0,0 +1,18 @@
+// #docregion import,twoparts
+import {Component, View, bootstrap} from 'angular2/angular2';
+// #enddocregion twoparts,  import
+
+@Component({
+  selector: 'my-app'
+})
+@View({
+  template: '<h1 id="output">My first Angular 2 App</h1>'
+})
+class AppComponent {
+}
+
+// #docregion bootstrap, twoparts
+bootstrap(AppComponent);
+// #enddocregion twoparts
+// to be included in bootstrap...
+// #enddocregion

public/doc-shredder/regionExtractor.js

@@ -1,3 +1,5 @@
+var _ = require('lodash');
+
 module.exports = function regionExtractor() {
 
   var nullLine = '###';
@@ -10,37 +12,82 @@ module.exports = function regionExtractor() {
   //     or // #docregion foo      for js/ts
   //   2) In back: a comment marker followed by '#enddocregion'
   // Regions can be nested and any regions not 'closed' are automatically closed at the end of the doc.
+
+  // empty enddocregion always closes last region started.
+  // enddocregions with names that do no match start region tags get ignored.
+
   return function(content, commentPrefixes) {
 
     var lines = result = content.split(/\r?\n/);
-    var docs = [];
-    var docStack = [];
-    var doc = null;
 
+    var docStack = [];
+    var docMap = {};
+    var doc;
+    var regionNames;
     lines.forEach(function(line, ix) {
       if (isCommentLine(line, commentPrefixes)) {
         if (hasRegionTag(line)) {
-          if (doc) docStack.push(doc);
-          doc = {startIx: ix, regionName: getRegionName(line)};
           lines[ix] = nullLine;
-          docs.push(doc);
-        } else if (hasEndRegionTag(line)) {
-          if (doc) {
-            lines[ix] = nullLine;
-            doc.endIx = ix;
-            doc = docStack.pop();
+
+          regionNames = getRegionNames(line);
+          regionNames.forEach(function(rn) {
+            doc = docMap[rn];
+            if (!doc) {
+              // regionName may be ''
+              doc = {regionName: rn, ranges: [ { startIx: ix} ] };
+              docMap[rn] = doc;
+            } else {
+              // only add a new range if prev range is closed
+              var lastRange = doc.ranges[doc.ranges.length-1];
+              if (lastRange.endIx) {
+                doc.ranges.push({startIx: ix});
               }
             }
+            docStack.push(doc);
+          });
+
+        } else if (hasEndRegionTag(line)) {
+          lines[ix] = nullLine;
+          regionNames = getEndRegionNames(line);
+          regionNames.forEach(function(rn) {
+            // handle endregions with no name specially.
+            // They operate on the last region created.
+            if (rn.length == 0) {
+              if (docStack.length) {
+                // update last item on the stack
+                doc = docStack.pop();
+                doc.ranges[doc.ranges.length - 1].endIx = ix;
+              }
+            } else {
+              doc = docMap[rn];
+              // ignore endregion if name is specified but not found.
+              if (doc) {
+                doc.ranges[doc.ranges.length - 1].endIx = ix;
+                // remove doc from stack
+                _.remove(docStack, function (item) {
+                  return item.regionName === rn;
+                });
+              }
+            }
+
+          })
+        }
       }
     });
 
+    var docs = _.values(docMap);
     docs.forEach(function(doc) {
-      var fragLines, content;
-      if (doc.endIx) {
-        fragLines = lines.slice(doc.startIx + 1, doc.endIx);
+      var content;
+      var fragLines = [];
+      doc.ranges.forEach(function (range) {
+        var subLines;
+        if (range.endIx) {
+          subLines = lines.slice(range.startIx + 1, range.endIx);
         } else {
-        fragLines = lines.slice(doc.startIx + 1);
+          subLines = lines.slice(range.startIx + 1);
         }
+        fragLines = fragLines.concat(subLines);
+      });
       fragLines = trimLeftIndent(fragLines);
       content = fragLines.join('\n');
       // eliminate all #docregion lines
@@ -94,13 +141,23 @@ function hasEndRegionTag(line) {
   return line.indexOf("#enddocregion") >= 0;
 }
 
-function getRegionName(line) {
+function getRegionNames(line) {
+  return extractRegionNames(line, /#docregion\s*(\S.*)/);
+}
+
+function getEndRegionNames(line) {
+  return extractRegionNames(line, /#enddocregion\s*(\S.*)/);
+}
+
+function extractRegionNames(line, rx) {
   try {
-    var name = line.match(/#docregion\s*(\S*).*/)[1];
+    var names = line.match(rx)[1];
+    names = names.replace(/\s*/g,'');
     // Hack for html regions that look like <!-- #docregion --> or */
-    name = name.replace("-->","").replace('\*\/',"");
-    return name;
+    names = names.replace("-->","").replace('\*\/',"");
+    names = names.split(',');
+    return names;
   } catch (e) {
-    return '';
+    return [''];
   }
 }

public/doc-shredder/regionExtractor.old.js

@@ -0,0 +1,106 @@
+module.exports = function regionExtractor() {
+
+  var nullLine = '###';
+  var nullLinePattern = new RegExp(nullLine + '\n', 'g');
+
+  // split out each fragment in {content} into a separate doc
+  // a fragment is a section of text surrounded by
+  //   1) In front: a comment marker followed by '#docregion' followed by an optional region name. For example:
+  //        <-- #docregion foo --> for html
+  //     or // #docregion foo      for js/ts
+  //   2) In back: a comment marker followed by '#enddocregion'
+  // Regions can be nested and any regions not 'closed' are automatically closed at the end of the doc.
+  return function(content, commentPrefixes) {
+
+    var lines = result = content.split(/\r?\n/);
+    var docs = [];
+    var docStack = [];
+    var doc = null;
+
+    lines.forEach(function(line, ix) {
+      if (isCommentLine(line, commentPrefixes)) {
+        if (hasRegionTag(line)) {
+          if (doc) docStack.push(doc);
+          doc = {startIx: ix, regionName: getRegionName(line)};
+          lines[ix] = nullLine;
+          docs.push(doc);
+        } else if (hasEndRegionTag(line)) {
+          if (doc) {
+            lines[ix] = nullLine;
+            doc.endIx = ix;
+            doc = docStack.pop();
+          }
+        }
+      }
+    });
+
+    docs.forEach(function(doc) {
+      var fragLines, content;
+      if (doc.endIx) {
+        fragLines = lines.slice(doc.startIx + 1, doc.endIx);
+      } else {
+        fragLines = lines.slice(doc.startIx + 1);
+      }
+      fragLines = trimLeftIndent(fragLines);
+      content = fragLines.join('\n');
+      // eliminate all #docregion lines
+      content = content.replace(nullLinePattern, '');
+      if (content.substr(-3) === nullLine) {
+        content = content.substr(0, content.length-3);
+      }
+      doc.content = content;
+    });
+    return docs;
+  }
+
+};
+
+function trimLeftIndent(lines) {
+  var minIx  = 100;
+  var ok = lines.every(function(line) {
+    // var ix = line.search(/\S/);
+    var ix = line.search(/[^ ]/);
+    if (ix === 0) return false;
+    if (ix === -1) return true;
+    if (ix > 0) {
+      minIx = Math.min(minIx, ix);
+    }
+    return true;
+  });
+  if ( (!ok) || minIx === 100) return lines;
+
+  var result = lines.map(function(line) {
+    if (line.length > minIx) {
+      return line.substr(minIx);
+    } else {
+      // this can happen if line is all blanks and shorter than mixIx
+      return line;
+    }
+  });
+  return result;
+}
+
+function isCommentLine(line, commentPrefixes) {
+  return commentPrefixes.some(function(prefix) {
+    return line.trim().indexOf(prefix) == 0;
+  });
+}
+
+function hasRegionTag(line) {
+  return line.indexOf("#docregion") >= 0;
+}
+
+function hasEndRegionTag(line) {
+  return line.indexOf("#enddocregion") >= 0;
+}
+
+function getRegionName(line) {
+  try {
+    var name = line.match(/#docregion\s*(\S*).*/)[1];
+    // Hack for html regions that look like <!-- #docregion --> or */
+    name = name.replace("-->","").replace('\*\/',"");
+    return name;
+  } catch (e) {
+    return '';
+  }
+}