Protection against current code-block removing

lib/utils/removeIndent.js

@@ -1,8 +1,8 @@
 var Draft = require('draft-js');
 var endsWith = require('ends-with');
+var detectIndent = require('detect-indent');
 
 var getNewLine = require('./getNewLine');
-var getIndentation = require('./getIndentation');
 var getLines = require('./getLines');
 var getLineAnchorForOffset = require('./getLineAnchorForOffset');
 
@@ -26,8 +26,27 @@ function removeIndent(editorState) {
   var blockText = currentBlock.getText();
 
   // Detect newline separator and indentation
+  var indent = detectIndent(blockText);
+
+  // if previous block was not `code-block` and we are at the beginning of line,
+  // we don't do any action to prevent current `code-block` removing
+  if (indent.amount < 1) {
+    var lastBlockBefore = contentState
+      .getBlockMap()
+      .takeUntil((value, key) => {
+        return key.match(startKey);
+      })
+      .last();
+
+    if (
+      !(lastBlockBefore instanceof Draft.ContentBlock) ||
+      lastBlockBefore.getType() !== 'code-block'
+    ) {
+      return editorState;
+    }
+  }
+
   var newLine = getNewLine(blockText);
-  var indent = getIndentation(blockText);
 
   // Get current line
   var lines = getLines(blockText, newLine);