codemirror 3.18 with enabled the fullscreen addon

applications/admin/static/codemirror/mode/markdown/markdown.js

@@ -103,6 +103,9 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
       state.f = inlineNormal;
       state.block = blockNormal;
     }
+    // Reset state.trailingSpace
+    state.trailingSpace = 0;
+    state.trailingSpaceNewLine = false;
     // Mark this line as blank
     state.thisLineHasContent = false;
     return null;
@@ -217,6 +220,12 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
       }
     }
 
+    if (state.trailingSpaceNewLine) {
+      styles.push("trailing-space-new-line");
+    } else if (state.trailingSpace) {
+      styles.push("trailing-space-" + (state.trailingSpace % 2 ? "a" : "b"));
+    }
+
     return styles.length ? styles.join(' ') : null;
   }
 
@@ -369,6 +378,14 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
       }
     }
 
+    if (ch === ' ') {
+      if (stream.match(/ +$/, false)) {
+        state.trailingSpace++;
+      } else if (state.trailingSpace) {
+        state.trailingSpaceNewLine = true;
+      }
+    }
+
     return getType(state);
   }
 
@@ -453,7 +470,9 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
         taskList: false,
         list: false,
         listDepth: 0,
-        quote: 0
+        quote: 0,
+        trailingSpace: 0,
+        trailingSpaceNewLine: false
       };
     },
 
@@ -481,6 +500,8 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
         list: s.list,
         listDepth: s.listDepth,
         quote: s.quote,
+        trailingSpace: s.trailingSpace,
+        trailingSpaceNewLine: s.trailingSpaceNewLine,
         md_inside: s.md_inside
       };
     },
@@ -504,6 +525,10 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
         // Reset state.code
         state.code = false;
 
+        // Reset state.trailingSpace
+        state.trailingSpace = 0;
+        state.trailingSpaceNewLine = false;
+
         state.f = state.block;
         var indentation = stream.match(/^\s*/, true)[0].replace(/\t/g, '    ').length;
         var difference = Math.floor((indentation - state.indentation) / 4) * 4;