Allow document to have no nodes when deleting a single void-block. Partially fixes #505 (#622)

src/transforms/at-range.js

@@ -211,7 +211,7 @@ export function deleteBackwardAtRange(transform, range, n = 1, options = {}) {
     return
   }
   // If the closest is not void, but empty, remove it
-  if (block && !block.isVoid && block.isEmpty) {
+  if (block && !block.isVoid && block.isEmpty && document.nodes.size !== 1) {
     transform.removeNodeByKey(block.key, { normalize })
     return
   }
@@ -395,7 +395,7 @@ export function deleteForwardAtRange(transform, range, n = 1, options = {}) {
     return
   }
   // If the closest is not void, but empty, remove it
-  if (block && !block.isVoid && block.isEmpty) {
+  if (block && !block.isVoid && block.isEmpty && document.nodes.size !== 1) {
     transform.removeNodeByKey(block.key, { normalize })
     return
   }

src/transforms/normalize.js

@@ -60,16 +60,24 @@ export function normalizeNodeByKey(transform, key, schema) {
 export function normalizeSelection(transform) {
   let { state } = transform
   let { document, selection } = state
+
+  // If document is empty, return
+  if (document.nodes.size === 0) {
+    return
+  }
+
   selection = selection.normalize(document)
 
   // If the selection is unset, or the anchor or focus key in the selection are
-  // pointing to nodes that no longer exist, warn and reset the selection.
+  // pointing to nodes that no longer exist, warn (if not unset) and reset the selection.
   if (
     selection.isUnset ||
     !document.hasDescendant(selection.anchorKey) ||
     !document.hasDescendant(selection.focusKey)
   ) {
+    if (!selection.isUnset) {
       warn('The selection was invalid and was reset to start of the document. The selection in question was:', selection)
+    }
 
     const firstText = document.getFirstText()
     selection = selection.merge({

test/transforms/fixtures/at-current-range/delete-backward/single-non-void-block/index.js

@@ -0,0 +1,10 @@
+
+export default function (state) {
+  const { document } = state
+  const nodeToBeFocused = document.nodes.first()
+  return state
+    .transform()
+    .collapseToEndOf(nodeToBeFocused)
+    .deleteBackward()
+    .apply()
+}

test/transforms/fixtures/at-current-range/delete-backward/single-non-void-block/input.yaml

@@ -0,0 +1,7 @@
+
+nodes:
+  - kind: block
+    type: paragraph
+    nodes:
+      - kind: text
+        text: ""

test/transforms/fixtures/at-current-range/delete-backward/single-non-void-block/output.yaml

@@ -0,0 +1,7 @@
+
+nodes:
+  - kind: block
+    type: paragraph
+    nodes:
+      - kind: text
+        text: ""

test/transforms/fixtures/at-current-range/delete-backward/single-void-block/index.js

@@ -0,0 +1,10 @@
+
+export default function (state) {
+  const { document } = state
+  const nodeToBeFocused = document.nodes.first()
+  return state
+    .transform()
+    .collapseToEndOf(nodeToBeFocused)
+    .deleteBackward()
+    .apply()
+}

test/transforms/fixtures/at-current-range/delete-backward/single-void-block/input.yaml

@@ -0,0 +1,5 @@
+
+nodes:
+  - kind: block
+    type: image
+    isVoid: true

test/transforms/fixtures/at-current-range/delete-backward/single-void-block/output.yaml

@@ -0,0 +1,2 @@
+
+nodes: []

test/transforms/fixtures/at-current-range/delete-forward/single-non-void-block/index.js

@@ -0,0 +1,10 @@
+
+export default function (state) {
+  const { document } = state
+  const nodeToBeFocused = document.nodes.first()
+  return state
+    .transform()
+    .collapseToStartOf(nodeToBeFocused)
+    .deleteForward()
+    .apply()
+}

test/transforms/fixtures/at-current-range/delete-forward/single-non-void-block/input.yaml

@@ -0,0 +1,7 @@
+
+nodes:
+  - kind: block
+    type: paragraph
+    nodes:
+      - kind: text
+        text: ""

test/transforms/fixtures/at-current-range/delete-forward/single-non-void-block/output.yaml

@@ -0,0 +1,7 @@
+
+nodes:
+  - kind: block
+    type: paragraph
+    nodes:
+      - kind: text
+        text: ""

test/transforms/fixtures/at-current-range/delete-forward/single-void-block/index.js

@@ -0,0 +1,10 @@
+
+export default function (state) {
+  const { document } = state
+  const nodeToBeFocused = document.nodes.first()
+  return state
+    .transform()
+    .collapseToStartOf(nodeToBeFocused)
+    .deleteForward()
+    .apply()
+}

test/transforms/fixtures/at-current-range/delete-forward/single-void-block/input.yaml

@@ -0,0 +1,5 @@
+
+nodes:
+  - kind: block
+    type: image
+    isVoid: true

test/transforms/fixtures/at-current-range/delete-forward/single-void-block/output.yaml

@@ -0,0 +1,2 @@
+
+nodes: []