From 06e7bc5a6d6e2e43c7ffdc0bb09d2d37322050aa Mon Sep 17 00:00:00 2001
From: Thiago Veronezi <thiago@veronezi.org>
Date: Tue, 15 Nov 2016 11:08:15 -0500
Subject: [PATCH] #461 Remove md tags by using temporary div

---
 src/js/simplemde.js | 44 +++++++++++++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/src/js/simplemde.js b/src/js/simplemde.js
index 016d693..f72df0c 100644
--- a/src/js/simplemde.js
+++ b/src/js/simplemde.js
@@ -999,25 +999,35 @@ function _toggleBlock(editor, type, start_chars, end_chars) {
 }
 
 function _cleanBlock(cm) {
-	if(/editor-preview-active/.test(cm.getWrapperElement().lastChild.className))
+	if(/editor-preview-active/.test(cm.getWrapperElement().lastChild.className)) {
 		return;
-
-	var startPoint = cm.getCursor("start");
-	var endPoint = cm.getCursor("end");
-	var text;
-
-	for(var line = startPoint.line; line <= endPoint.line; line++) {
-		text = cm.getLine(line);
-		text = text.replace(/^[ ]*([# ]+|\*|\-|[> ]+|[0-9]+(.|\)))[ ]*/, "");
-
-		cm.replaceRange(text, {
-			line: line,
-			ch: 0
-		}, {
-			line: line,
-			ch: 99999999999999
-		});
 	}
+	// split the selection in lines
+	var selections = cm.getSelection().split("\n");
+	var removeTags = function(selection) {
+		var html = marked(selection);
+		// create a div...
+		var tmp = document.createElement("DIV");
+		// .. with the new generated html code...
+		tmp.innerHTML = html;
+		// ... now read the text of the generated code.
+		// This way the browser does the job of removing the tags.
+		var result = selection;
+		if(tmp.textContent) {
+			result = tmp.textContent;
+		} else if(tmp.innerText) {
+			result = tmp.innerText;
+		}
+		// removing trailing "new line"
+		return result.split("\n").join("");
+	};
+	var result = [];
+	for(var i = 0; i < selections.length; i++) {
+		result.push(removeTags(selections[i]));
+	}
+	// Add removed "new lines" back to the resulting string.
+	// Replace the selection with the new clean selection.
+	cm.replaceSelection(result.join("\n"));
 }
 
 // Merge the properties of one object into another.