Implement partial blocks

This allows for failover for missing partials as well as limited templating ability through the `{{> @partial-block }}` partial special case.

Partial fix for #1018

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/handlebars/compiler/printer.js b/lib/handlebars/compiler/printer.js
index 107d4b6..cf7aa48 100644
--- a/lib/handlebars/compiler/printer.js
+++ b/lib/handlebars/compiler/printer.js
@@ -84,6 +84,22 @@ PrintVisitor.prototype.PartialStatement = function(partial) {
   }
   return this.pad('{{> ' + content + ' }}');
 };
+PrintVisitor.prototype.PartialBlockStatement = function(partial) {
+  let content = 'PARTIAL BLOCK:' + partial.name.original;
+  if (partial.params[0]) {
+    content += ' ' + this.accept(partial.params[0]);
+  }
+  if (partial.hash) {
+    content += ' ' + this.accept(partial.hash);
+  }
+
+  content += ' ' + this.pad('PROGRAM:');
+  this.padding++;
+  content += this.accept(partial.program);
+  this.padding--;
+
+  return this.pad('{{> ' + content + ' }}');
+};
 
 PrintVisitor.prototype.ContentStatement = function(content) {
   return this.pad("CONTENT[ '" + content.value + "' ]");