fix a few void block transform and rendering bugs

lib/components/content.js

@@ -324,7 +324,7 @@ class Content extends React.Component {
         focusKey: focus.key,
         focusOffset: focus.offset
       })
-      .apply({ isNative: true })
+      .apply()
 
     this.onChange(state)
   }

lib/models/node.js

@@ -763,6 +763,17 @@ const Node = {
     })
   },
 
+  /**
+   * Check if a node has a void parent by `key`.
+   *
+   * @param {String or Node} key
+   * @return {Boolean}
+   */
+
+  hasVoidParent(key) {
+    return !!this.getClosest(key, n => n.isVoid)
+  },
+
   /**
    * Insert child `nodes` after child by `key`.
    *
@@ -772,7 +783,6 @@ const Node = {
    */
 
   insertChildrenAfter(key, nodes) {
-    key = normalizeKey(key)
     const child = this.getChild(key)
     const index = this.nodes.indexOf(child)
 

lib/models/state.js

@@ -560,9 +560,17 @@ class State extends new Record(DEFAULTS) {
     }
 
     else if (selection.isAtStartOf(startNode)) {
-      const parent = document.getParent(startNode)
-      const previous = document.getPreviousSibling(parent).nodes.first()
-      after = selection.collapseToEndOf(previous)
+      const previous = document.getPreviousText(startNode)
+      const prevBlock = document.getClosestBlock(previous)
+      const prevInline = document.getClosestInline(previous)
+
+      if (prevBlock && prevBlock.isVoid) {
+        after = selection
+      } else if (prevInline && prevInline.isVoid) {
+        after = selection
+      } else {
+        after = selection.collapseToEndOf(previous)
+      }
     }
 
     else {

lib/models/transforms.js

@@ -117,6 +117,14 @@ const Transforms = {
 
     if (range.isAtStartOf(startNode)) {
       const previous = node.getPreviousText(startNode)
+
+      // If the previous descendant is void, remove it.
+      const prevBlock = node.getClosestBlock(previous)
+      if (prevBlock && prevBlock.isVoid) return node.removeDescendant(prevBlock)
+
+      const prevInline = node.getClosestInline(previous)
+      if (prevInline && prevInline.isVoid) return node.removeDescendant(prevInline)
+
       range = range.extendToEndOf(previous)
       range = range.normalize(node)
       return node.deleteAtRange(range)

lib/plugins/core.js

@@ -147,11 +147,18 @@ function Plugin(options = {}) {
 
     onKeyDown(e, state, editor) {
       const key = keycode(e.which)
-      const transform = state.transform()
+      let transform = state.transform()
 
       switch (key) {
         case 'enter': {
-          return transform.splitBlock().apply()
+          const { startBlock } = state
+          if (startBlock && !startBlock.isVoid) return transform.splitBlock().apply()
+
+          const { document, startKey } = state
+          const text = document.getNextText(startKey)
+          if (!text) return
+
+          return transform.collapseToStartOf(text).apply()
         }
 
         case 'backspace': {