fix schema normalizing to merge into history

src/plugins/core.js

@@ -56,7 +56,7 @@ function Plugin(options = {}) {
 
     const newState = state.transform()
       .normalize(schema)
-      .apply({ save: false })
+      .apply({ merge: true })
 
     debug('onBeforeChange')
     return newState

src/transforms/on-history.js

@@ -52,13 +52,13 @@ Transforms.save = (transform, options = {}) => {
   let { state, operations } = transform
   let { history } = state
   let { undos, redos } = history
+  let previous = undos.peek()
 
   // If there are no operations, abort.
   if (!operations.length) return
 
   // Create a new save point or merge the operations into the previous one.
-  if (merge) {
-    let previous = undos.peek()
+  if (merge && previous) {
     undos = undos.pop()
     previous = previous.concat(operations)
     undos = undos.push(previous)

test/transforms/fixtures/on-history/undo/remove-middle-void/index.js

@@ -0,0 +1,11 @@
+
+export default function (state) {
+  return state
+    .transform()
+    .removeNodeByKey('b')
+    .apply()
+
+    .transform()
+    .undo()
+    .apply()
+}

test/transforms/fixtures/on-history/undo/remove-middle-void/input.yaml

@@ -0,0 +1,14 @@
+
+nodes:
+  - kind: block
+    key: a
+    type: image
+    isVoid: true
+  - kind: block
+    key: b
+    type: image
+    isVoid: true
+  - kind: block
+    key: c
+    type: image
+    isVoid: true

test/transforms/fixtures/on-history/undo/remove-middle-void/output.yaml

@@ -0,0 +1,14 @@
+
+nodes:
+  - kind: block
+    key: a
+    type: image
+    isVoid: true
+  - kind: block
+    key: b
+    type: image
+    isVoid: true
+  - kind: block
+    key: c
+    type: image
+    isVoid: true

test/transforms/fixtures/on-history/undo/remove-nested-middle-void/index.js

@@ -0,0 +1,12 @@
+
+export default function (state) {
+  return state
+    .transform()
+    .removeNodeByKey('bb')
+    .removeNodeByKey('b')
+    .apply()
+
+    .transform()
+    .undo()
+    .apply()
+}

test/transforms/fixtures/on-history/undo/remove-nested-middle-void/input.yaml

@@ -0,0 +1,26 @@
+
+nodes:
+  - kind: block
+    type: figure
+    key: a
+    nodes:
+    - kind: block
+      type: image
+      key: aa
+      isVoid: true
+  - kind: block
+    type: figure
+    key: b
+    nodes:
+    - kind: block
+      type: image
+      key: bb
+      isVoid: true
+  - kind: block
+    type: figure
+    key: c
+    nodes:
+    - kind: block
+      type: image
+      key: cc
+      isVoid: true

test/transforms/fixtures/on-history/undo/remove-nested-middle-void/output.yaml

@@ -0,0 +1,26 @@
+
+nodes:
+  - kind: block
+    type: figure
+    key: a
+    nodes:
+    - kind: block
+      type: image
+      key: aa
+      isVoid: true
+  - kind: block
+    type: figure
+    key: b
+    nodes:
+    - kind: block
+      type: image
+      key: bb
+      isVoid: true
+  - kind: block
+    type: figure
+    key: c
+    nodes:
+    - kind: block
+      type: image
+      key: cc
+      isVoid: true

test/transforms/fixtures/on-history/undo/remove-node/index.js

@@ -1,10 +1,6 @@
 
-import assert from 'assert'
-
 export default function (state) {
-  const { selection } = state
-
-  let next = state
+  return state
     .transform()
     .removeNodeByKey('key1')
     .apply()
@@ -12,6 +8,4 @@ export default function (state) {
     .transform()
     .undo()
     .apply()
-
-  return next
 }