fix to only double new lines on last leaf

examples/rtl/index.js

@@ -42,6 +42,23 @@ class PlainText extends React.Component {
     this.setState({ state })
   }
 
+  /**
+   * On key down, if it's <shift-enter> add a soft break.
+   *
+   * @param {Event} e
+   * @param {Object} data
+   * @param {State} state
+   */
+
+  onKeyDown = (e, data, state) => {
+    if (data.key == 'enter' && data.isShift) {
+      return state
+        .transform()
+        .insertText('\n')
+        .apply()
+    }
+  }
+
   /**
    * Render the editor.
    *
@@ -53,6 +70,7 @@ class PlainText extends React.Component {
       <Editor
         placeholder={'Enter some plain text...'}
         onChange={this.onChange}
+        onKeyDown={this.onKeyDown}
         renderNode={this.renderNode}
         state={this.state.state}
       />

lib/components/content.js

@@ -466,12 +466,15 @@ class Content extends React.Component {
     const { key, index, start, end } = point
     const ranges = this.getRanges(key)
     const range = ranges.get(index)
+    const isLast = index == ranges.size - 1
     const { text, marks } = range
     let { textContent } = anchorNode
+    const lastChar = textContent.charAt(textContent.length - 1)
 
-    // COMPAT: If the DOM text ends in a new line, we will have added one to
+    // If we're dealing with the last leaf, and the DOM text ends in a new line,
-    // account for browsers collapsing a single one, so remove it.
+    // we will have added another new line in <Leaf>'s render method to account
-    if (textContent.charAt(textContent.length - 1) == '\n') {
+    // for browsers collapsing a single trailing new lines, so remove it.
+    if (isLast && lastChar == '\n') {
       textContent = textContent.slice(0, -1)
     }
 

lib/components/leaf.js

@@ -187,16 +187,19 @@ class Leaf extends React.Component {
   }
 
   renderText() {
-    const { text, parent } = this.props
+    const { text, index, ranges } = this.props
 
     // If the text is empty, we need to render a <br/> to get the block to have
     // the proper height.
     if (text == '') return <br />
 
-    // COMPAT: Browsers will collapse trailing new lines, so we need to add an
+    // COMPAT: Browsers will collapse trailing new lines at the end of blocks,
-    // extra trailing new lines to prevent that.
+    // so we need to add an extra trailing new lines to prevent that.
-    if (text.charAt(text.length - 1) == '\n') return `${text}\n`
+    const lastChar = text.charAt(text.length - 1)
+    const isLast = index == ranges.size - 1
+    if (isLast && lastChar == '\n') return `${text}\n`
 
+    // Otherwise, just return the text.
     return text
   }