FEATURE: Quote reply at cursor

app/assets/javascripts/discourse/controllers/composer.js.es6

@@ -70,6 +70,11 @@ export default Discourse.Controller.extend({
     if (c) { c.appendText(text); }
   },
 
+  appendBlockAtCursor: function(text) {
+    var c = this.get('model');
+    if (c) { c.appendText(text, $('#wmd-input').caret(), {block: true}); }
+  },
+
   categories: function() {
     return Discourse.Category.list();
   }.property(),

app/assets/javascripts/discourse/controllers/quote-button.js.es6

@@ -119,7 +119,7 @@ export default Discourse.Controller.extend({
     var quotedText = Discourse.Quote.build(post, buffer);
     composerOpts.quote = quotedText;
     if (composerController.get('content.viewOpen') || composerController.get('content.viewDraft')) {
-      composerController.appendText(quotedText);
+      composerController.appendBlockAtCursor(quotedText.trim());
     } else {
       composerController.open(composerOpts);
     }

app/assets/javascripts/discourse/lib/caret_position.js

@@ -19,6 +19,10 @@ getCaret = function(el) {
 
 clone = null;
 
+$.fn.caret = function(){
+  return getCaret(this[0]);
+};
+
 /**
   This is a jQuery plugin to retrieve the caret position in a textarea
 

app/assets/javascripts/discourse/models/composer.js

@@ -266,8 +266,36 @@ Discourse.Composer = Discourse.Model.extend({
     @method appendText
     @param {String} text the text to append
   **/
-  appendText: function(text) {
-    this.set('reply', (this.get('reply') || '') + text);
+  appendText: function(text,position,opts) {
+    var reply = (this.get('reply') || '');
+    position = typeof(position) === "number" ? position : reply.length;
+
+    var before = reply.slice(0, position) || '';
+    var after = reply.slice(position) || '';
+
+    var stripped, i;
+
+    if(opts && opts.block){
+      if(before.trim() !== ""){
+        stripped = before.replace(/\r/g, "");
+        for(i=0; i<2; i++){
+          if(stripped[stripped.length - 1 - i] !== "\n"){
+            before += "\n";
+            position++;
+          }
+        }
+      }
+      if(after.trim() !== ""){
+        stripped = after.replace(/\r/g, "");
+        for(i=0; i<2; i++){
+          if(stripped[i] !== "\n"){
+            after = "\n" + after;
+          }
+        }
+      }
+    }
+
+    this.set('reply', before + text + after);
   },
 
   togglePreview: function() {

test/javascripts/models/composer_test.js

@@ -57,6 +57,23 @@ test("appendText", function() {
   composer.appendText(" world");
   equal(composer.get('reply'), "hello world", "it appends text to existing text");
 
+  composer.clearState();
+  composer.appendText("a\n\n\n\nb");
+  composer.appendText("c",3,{block: true});
+
+  equal(composer.get("reply"), "a\n\nc\n\nb");
+
+  composer.clearState();
+  composer.appendText("ab");
+  composer.appendText("c",1,{block: true});
+
+  equal(composer.get("reply"), "a\n\nc\n\nb");
+
+  composer.clearState();
+  composer.appendText("\nab");
+  composer.appendText("c",0,{block: true});
+
+  equal(composer.get("reply"), "c\n\nab");
 });
 
 test("Title length for regular topics", function() {