Add horizontal rule button

README.md

@@ -97,6 +97,7 @@ Unordered List | toggleUnorderedList | fa fa-list-ul | Generic List (Ctrl+L)
 Numbered List | toggleOrderedList | fa fa-list-ol | Numbered List (Ctrl+Alt+L)
 Link | drawLink | fa fa-link | Create Link (Ctrl+K)
 Image | drawImage | fa fa-picture-o | Insert Image (Ctrl+Alt+I)
+Horizontal Rule | drawHorizontalRule | fa fa-minus | Insert Horizontal Line
 Preview | togglePreview | fa fa-eye | Toggle Preview (Ctrl+P)
 Markdown Guide | [This link](http://nextstepwebs.github.io/simplemde-markdown-editor/markdown-guide) | fa fa-question-circle | Markdown Guide
 

source files/simplemde.js

@@ -195,6 +195,16 @@ function drawImage(editor) {
 }
 
 
+/**
+ * Action for drawing a horizontal rule.
+ */
+function drawHorizontalRule(editor) {
+	var cm = editor.codemirror;
+	var stat = getState(cm);
+	_replaceSelection(cm, stat.image, '', '\n\n-----\n\n');
+}
+
+
 /**
  * Undo action.
  */
@@ -719,10 +729,12 @@ SimpleMDE.prototype.value = function(val) {
 SimpleMDE.toggleBold = toggleBold;
 SimpleMDE.toggleItalic = toggleItalic;
 SimpleMDE.toggleBlockquote = toggleBlockquote;
+SimpleMDE.toggleCodeBlock = toggleCodeBlock;
 SimpleMDE.toggleUnorderedList = toggleUnorderedList;
 SimpleMDE.toggleOrderedList = toggleOrderedList;
 SimpleMDE.drawLink = drawLink;
 SimpleMDE.drawImage = drawImage;
+SimpleMDE.drawHorizontalRule = drawHorizontalRule;
 SimpleMDE.undo = undo;
 SimpleMDE.redo = redo;
 SimpleMDE.togglePreview = togglePreview;
@@ -740,6 +752,9 @@ SimpleMDE.prototype.toggleItalic = function() {
 SimpleMDE.prototype.toggleBlockquote = function() {
 	toggleBlockquote(this);
 };
+SimpleMDE.prototype.toggleCodeBlock = function() {
+	toggleCodeBlock(this);
+};
 SimpleMDE.prototype.toggleUnorderedList = function() {
 	toggleUnorderedList(this);
 };
@@ -752,6 +767,9 @@ SimpleMDE.prototype.drawLink = function() {
 SimpleMDE.prototype.drawImage = function() {
 	drawImage(this);
 };
+SimpleMDE.prototype.drawHorizontalRule = function() {
+	drawHorizontalRule(this);
+};
 SimpleMDE.prototype.undo = function() {
 	undo(this);
 };