fix bugs in rich text example

examples/rich-text/index.js

@@ -22,8 +22,8 @@ class App extends React.Component {
 
   hasBlock(type) {
     const { state } = this.state
-    const { currentWrappingNodes } = state
-    return currentWrappingNodes.some(node => node.type == type)
+    const { currentBlockNodes } = state
+    return currentBlockNodes.some(node => node.type == type)
   }
 
   onClickMark(e, type) {

lib/models/node.js

@@ -549,16 +549,11 @@ const Node = {
 
   hasNode(key) {
     key = normalizeKey(key)
-
-    const shallow = this.nodes.has(key)
-    if (shallow) return true
-
-    const deep = this.nodes
-      .map(node => node.kind == 'text' ? false : node.hasNode(key))
-      .some(has => has)
-    if (deep) return true
-
-    return false
+    return !! this.nodes.find((node) => {
+      return node.kind == 'text'
+        ? node.key == key
+        : node.key == key || node.hasNode(key)
+    })
   },
 
   /**

lib/models/state.js

@@ -200,12 +200,12 @@ class State extends Record(DEFAULTS) {
     const { startKey } = selection
     const startNode = document.getNode(startKey)
 
-    if (selection.isAtStartOf(document)) {
-      after = selection
+    if (selection.isExpanded) {
+      after = selection.moveToStart()
     }
 
-    else if (selection.isExpanded) {
-      after = selection.moveToStart()
+    else if (selection.isAtStartOf(document)) {
+      after = selection
     }
 
     else if (selection.isAtStartOf(startNode)) {