From 0077e467c6f714a29b3425c298f406aaa9a56507 Mon Sep 17 00:00:00 2001
From: keshav234156 <keshavgarg234156@gmail.com>
Date: Sun, 14 Jun 2020 23:59:11 +0530
Subject: [PATCH] changed wrapping function

---
 src/html/boldOrItalic.js | 124 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 120 insertions(+), 4 deletions(-)

diff --git a/src/html/boldOrItalic.js b/src/html/boldOrItalic.js
index 6061a9c..ffe7a1c 100644
--- a/src/html/boldOrItalic.js
+++ b/src/html/boldOrItalic.js
@@ -1,10 +1,126 @@
 'use strict';
 
 var strings = require('../strings');
-var wrapping = require('./wrapping');
 
-function boldOrItalic (chunks, type) {
-  wrapping(type === 'bold' ? 'strong' : 'em', strings.placeholders[type], chunks);
+function boldOrItalic(chunks, type) {
+  wrappingBoldItalic(type === 'bold' ? 'strong' : 'em', strings.placeholders[type], chunks);
 }
 
-module.exports = boldOrItalic;
+function wrappingBoldItalic(tag, placeholders, chunks) {
+  var open = '<' + tag;
+  var close = '</' + tag.replace(/</g, '</');
+  var rleading = new RegExp(open + '( [^>]*)?>$', 'i');
+  var rtrailing = new RegExp('^' + close + '>', 'i');
+  var ropen = new RegExp(open + '( [^>]*)?>', 'ig');
+  var rclose = new RegExp(close + '( [^>]*)?>', 'ig');
+
+  chunks.trim();
+
+  var trail = rtrailing.exec(chunks.after);
+  var lead = rleading.exec(chunks.before);
+  if (lead && trail) {
+    chunks.before = chunks.before.replace(rleading, '');
+    chunks.after = chunks.after.replace(rtrailing, '');
+  } else if (!chunks.selection) {
+    if (!trail && !lead && !surrounded(chunks, tag)) {
+      chunks.selection = placeholders;
+      chunks.after = close + '>' + chunks.after;
+      chunks.before += open + '>';
+    } else if (!trail && !lead && surrounded(chunks, tag)) {
+      chunks.before = chunks.before + close + '>';
+      chunks.after = '&#8203' + open + '>' + chunks.after;
+    } else if (trail) {
+      chunks.after = chunks.after.replace(rtrailing, '&#8203');
+      chunks.before = chunks.before + close + '>';
+    }
+  } else {
+    var opened = ropen.test(chunks.selection);
+    if (opened) {
+      chunks.selection = chunks.selection.replace(ropen, '');
+      if (!surrounded(chunks, tag)) {
+        chunks.before += open + '>';
+      }
+    }
+    var closed = rclose.test(chunks.selection);
+    if (closed) {
+      chunks.selection = chunks.selection.replace(rclose, '');
+      if (!surrounded(chunks, tag)) {
+        chunks.after = close + '>' + chunks.after;
+      }
+    }
+    if (opened || closed) {
+      pushover();
+      return;
+    }
+    if (surrounded(chunks, tag)) {
+      if (rleading.test(chunks.before)) {
+        chunks.before = chunks.before.replace(rleading, '');
+      } else {
+        chunks.before += close + '>';
+      }
+      if (rtrailing.test(chunks.after)) {
+        chunks.after = chunks.after.replace(rtrailing, '');
+      } else {
+        chunks.after = open + '>' + chunks.after;
+      }
+    }
+    if (!closebounded(chunks, tag)) {
+      chunks.after = close + '>' + chunks.after;
+      chunks.before += open + '>';
+    }
+    pushover();
+  }
+
+  function pushover() {
+    chunks.selection.replace(/<(\/)?([^> ]+)( [^>]*)?>/ig, pushoverOtherTags);
+  }
+
+  function pushoverOtherTags(all, closing, tag, a, i) {
+    var attrs = a || '';
+    var open = !closing;
+    var rclosed = new RegExp('<\/' + tag.replace(/</g, '</') + '>', 'i');
+    var ropened = new RegExp('<' + tag + '( [^>]*)?>', 'i');
+    if (open && !rclosed.test(chunks.selection.substr(i))) {
+      chunks.selection += '</' + tag + '>';
+      chunks.after = chunks.after.replace(/^(<\/[^>]+>)/, '$1<' + tag + attrs + '>');
+    }
+
+    if (closing && !ropened.test(chunks.selection.substr(0, i))) {
+      chunks.selection = '<' + tag + attrs + '>' + chunks.selection;
+      chunks.before = chunks.before.replace(/(<[^>]+(?: [^>]*)?>)$/, '</' + tag + '>$1');
+    }
+  }
+}
+
+function closebounded(chunks, tag) {
+  var rcloseleft = new RegExp('</' + tag.replace(/</g, '</') + '>$', 'i');
+  var ropenright = new RegExp('^<' + tag + '(?: [^>]*)?>', 'i');
+  var bounded = rcloseleft.test(chunks.before) && ropenright.test(chunks.after);
+  if (bounded) {
+    chunks.before = chunks.before.replace(rcloseleft, '');
+    chunks.after = chunks.after.replace(ropenright, '');
+  }
+  return bounded;
+}
+
+function surrounded(chunks, tag) {
+  var ropen = new RegExp('<' + tag + '(?: [^>]*)?>', 'ig');
+  var rclose = new RegExp('<\/' + tag.replace(/</g, '</') + '>', 'ig');
+  var opensBefore = count(chunks.before, ropen);
+  var opensAfter = count(chunks.after, ropen);
+  var closesBefore = count(chunks.before, rclose);
+  var closesAfter = count(chunks.after, rclose);
+  var open = opensBefore - closesBefore > 0;
+  var close = closesAfter - opensAfter > 0;
+  return open && close;
+
+  function count(text, regex) {
+    var match = text.match(regex);
+    if (match) {
+      return match.length;
+    }
+    return 0;
+  }
+}
+
+module.exports = boldOrItalic;
\ No newline at end of file