Fix indentation normalisation algorithm

devel/js/main.js

@@ -19,9 +19,15 @@ situation('start', {
   choices: ['#testing-option']
 });
 
+situation ('return', {
+  content: 'Choose an option...',
+  optionText: 'Return',
+  choices: ['#testing-option']
+});
+
 situation('functions-as-properties', {
-  content: (character, system, from) =>
-    `
+  content (character, system, from) {
+    return `
     This property of this situation is outputted by a function, which allows
     us to incorporate variables such as the name of the situation we came
     from; in this case, "${from}."
@@ -30,9 +36,10 @@ situation('functions-as-properties', {
     functions; the notable exception is optionText. Those functions are
     passed the character and system objects, in that order, and a third
     object that is usually either the current situation, or the situation
-    we just came from.`,
+    we just came from.`},
   tags: ['testing-option'],
-  optionText: 'Functions as properties'
+  optionText: 'Functions as properties',
+  choices: ['return']
 });
 
 situation('markdown-features', {
@@ -50,7 +57,8 @@ situation('markdown-features', {
   
   Additionally, we also support "smart quotes" and -- dashes.`,
   tags: ['testing-option'],
-  optionText: 'Markdown support'
+  optionText: 'Markdown support',
+  choices: ['return']
 });
 
 situation('special-links', {
@@ -72,7 +80,8 @@ situation('special-links', {
     'inserter-link': "-- like this"
   },
   tags: ['testing-option'],
-  optionText: 'Special Links'
+  optionText: 'Special Links',
+  choices: ['return']
 });
 
 situation('custom-actions', {
@@ -93,7 +102,8 @@ situation('custom-actions', {
     }
   },
   tags: ['testing-option'],
-  optionText: 'Special Actions'
+  optionText: 'Special Actions',
+  choices: ['return']
 });
 
 situation('randomness', {
@@ -108,14 +118,18 @@ situation('randomness', {
     ${["dog", "cat", "alpaca", "crow"].shuffle(system).join(', ')}.
     `,
   tags: ['testing-option'],
-  optionText: 'Randomness' 
+  optionText: 'Randomness' ,
+  choices: ['return']
 });
 
 var myIterators = {};
 
 situation('iterators', {
-  content: (character, system, from) =>
-  `
+  animal: oneOf('cat', 'crow', 'alpaca').cycling(),
+  content (character, system, from) {
+    console.log("got here");
+    console.log(this);
+    return `
     # Iterators
 
     Iterators are an useful feature for generating adaptive text. For example,
@@ -130,15 +144,19 @@ situation('iterators', {
 
     Other iterators allow you to ${a('cycle').writer('cycler')} through
     different content in ${a('various ways').writer('stopper')}.
-  `,
+
+    And finally, OneOf iterator objects can be used directly in situations:
+    ${this.animal}.
+    ` },
   writers: {
-    iterator: oneOf(['Cat', 'Dog', 'Crow', 'Alpaca']).randomly(),
+    iterator: oneOf('Cat', 'Dog', 'Crow', 'Alpaca').randomly(),
     consistent: () => myIterators.consistentIterator(),
-    cycler: oneOf(['Spring', 'Summer', 'Fall', 'Winter']).cycling(),
-    stopper: oneOf(['First click', 'Second click', 'Another click']).stopping()
+    cycler: oneOf('Spring', 'Summer', 'Fall', 'Winter').cycling(),
+    stopper: oneOf('First click', 'Second click', 'Another click').stopping()
   },
   tags: ['testing-option'],
-  optionText: 'Iterators'
+  optionText: 'Iterators',
+  choices: ['return']
 });
 
 situation('progress-bar', {
@@ -152,7 +170,8 @@ situation('progress-bar', {
     through Undum's own API.
     `,
   tags: ['testing-option'],
-  optionText: 'Progress bars'
+  optionText: 'Progress bars',
+  choices: ['return']
 });
 
 qualities({

docs/situation.md

@@ -92,6 +92,39 @@ The output from the function is taken as a string to be parsed as markdown, and
 
 Inside a content function, the value of `this` is bound to the situation object itself, allowing you to refer to properties of the situation.
 
+#### A note about indentation
+
+Markdown cares about indentation for things such as `<pre>` blocks and nested lists. However, we as programmers care about indentation to keep our code readable. As a compromise between the two, Raconteur will normalise indentation in content strings by doing the following:
+
+- Finding the smallest level of indentation on a non-empty line;
+- Stripping that level of indentation out of every line.
+
+This means that if you write:
+
+```javascript
+`
+  Lorem ipsum dolor sit amet.
+
+    var foo = x;
+`
+```
+
+Then Raconteur will normalise that to:
+
+```markdown
+Lorem ipsum dolor sit amet.
+
+  var foo = x;
+```
+
+So that when this is parsed as markdown, the first line will be a paragraph and the second line will be a code block. If, for some reason, you need an entire situation's content to be a preformatted code block, you can use a fenced code block:
+
+~~~markdown
+```
+This is a fenced code block.
+```
+~~~
+
 ### tags :: Array (from undum.Situation)
 
 A list of tags. See Undum documentation.

lib/situation.js

@@ -12,17 +12,25 @@ var undum = require('undum-commonjs'),
 ----------------------------------------------------------------------------*/
 
 /*
-  Normalises the whitespace on a string. So the indentation level of the
-  first line will become 0. FIXME: This isn't quite ideal. Need to figure out
-  a better way of preventing strings in source code ending up interpreted as
-  <pre> blocks.
+  Normalises the whitespace on a string.
 */
 
 String.prototype.normaliseTabs = function () {
-  let lines = this.split('\n');
-  let indent = lines[0].match(/^\s+/) || lines[1].match(/^\s+/);
-  if (!indent) return this;
-  return lines.map( s => s.replace(new RegExp('^' + indent), '')).join('\n');
+  var lines = this.split('\n');
+  var indents = lines
+    .filter((l) => l !== '') // Ignore empty lines
+    .map((l) => l.match(/^\s+/))
+    .map(function (m) {
+      if (m === null) return '';
+      return m[0];
+    });
+  var smallestIndent = indents.reduce(function(max, curr) {
+    if (curr.length < max.length) return curr;
+    return max;
+  }); // Find the "bottom" indentation level
+  return lines.map(function (l) {
+    return l.replace(new RegExp('^' + smallestIndent), '');
+  }).join('\n');
 };
 
 /* Agnostic Call */