Part of ACREP-32.

[mkws-moved-to-github.git] / src / mkws-handlebars.js

diff --git a/src/mkws-handlebars.js b/src/mkws-handlebars.js
index bd9af8d..1572f89 100644 (file)
--- a/src/mkws-handlebars.js
+++ b/src/mkws-handlebars.js
@@ -97,6 +97,10 @@ Handlebars.registerHelper('mkws-index1', function(obj) {
   return obj.data.index + 1;
 });
 
+Handlebars.registerHelper('mkws-indexplus', function(delta, obj) {
+  return obj.data.index + delta;
+});
+
 Handlebars.registerHelper('mkws-repeat', function(count, options) {
   var out = "";
   for (var i = 0; i < count; i++) {
@@ -104,3 +108,58 @@ Handlebars.registerHelper('mkws-repeat', function(count, options) {
   }
   return out;
 });
+
+// Ridiculous that Handlebars has no way to do "or"
+Handlebars.registerHelper('mkws-if-either', function(cond1, cond2, options) {
+  if (typeof cond1 === 'function') { cond1 = cond1.call(this); }
+  if (typeof cond2 === 'function') { cond2 = cond2.call(this); }
+
+  if (cond1 || cond2) {
+    return options.fn(this);
+  } else {
+    return options.inverse(this);
+  }
+});
+
+// Ridiculous that this, too, is not part of regular Handlebars
+// This code is by Mike Griffin, taken from this blog comment:
+//      http://doginthehat.com.au/2012/02/comparison-block-helper-for-handlebars-templates/#comment-44
+
+Handlebars.registerHelper('compare', function (lvalue, operator, rvalue, options) {
+  var operators, result;
+
+  if (arguments.length < 3) {
+    throw new Error("Handlerbars Helper 'compare' needs 2 parameters");
+  }
+
+  if (options === undefined) {
+    options = rvalue;
+    rvalue = operator;
+    operator = "===";
+  }
+
+  operators = {
+    '==': function (l, r) { return l == r; },
+    '===': function (l, r) { return l === r; },
+    '!=': function (l, r) { return l != r; },
+    '!==': function (l, r) { return l !== r; },
+    '<': function (l, r) { return l < r; },
+    '>': function (l, r) { return l > r; },
+    '<=': function (l, r) { return l <= r; },
+    '>=': function (l, r) { return l >= r; },
+    'typeof': function (l, r) { return typeof l == r; },
+    'matches': function (l, r) { return l.match(r); }
+  };
+
+  if (!operators[operator]) {
+    throw new Error("Handlerbars Helper 'compare' doesn't know the operator " + operator);
+  }
+
+  result = operators[operator](lvalue, rvalue);
+
+  if (result) {
+    return options.fn(this);
+  } else {
+    return options.inverse(this);
+  }
+});