feat: Checkbox/TODO list item block (#729)

* v0.12.0

* v0.12.1

* v0.12.2

* v0.12.3

* v0.12.4

* v0.13.0

* v0.13.1

* Added check list default block

* Implemented PR feedback

* Updated screenshots

* Fixed check list item HTML/Markdown conversion

* Updated locales

* Updated screenshots

* Updated check list external HTML

* Updated check list parse HTML

* Made check list item not editable when the editor isn't

* Fixes to check list item parsing, rendering, and exporting

* Implemented PR feedback

* Small fix

---------

Co-authored-by: yousefed <yousefdardiry@gmail.com>

Author: matthewlipski

packages/core/src/api/exporters/html/__snapshots__/lists/basic/external.html

@@ -0,0 +1 @@
+<ul><li><p class="bn-inline-content">Bullet List Item 1</p></li><li><p class="bn-inline-content">Bullet List Item 2</p></li></ul><ol><li><p class="bn-inline-content">Numbered List Item 1</p></li><li><p class="bn-inline-content">Numbered List Item 2</p></li></ol><ul><li><input type="checkbox"><p class="bn-inline-content">Check List Item 1</p></li><li><input type="checkbox" checked><p class="bn-inline-content">Check List Item 2</p></li></ul>

packages/core/src/api/exporters/html/__snapshots__/lists/basic/internal.html

@@ -0,0 +1 @@
+<div class="bn-block-group" data-node-type="blockGroup"><div class="bn-block-outer" data-node-type="blockOuter" data-id="1"><div class="bn-block" data-node-type="blockContainer" data-id="1"><div class="bn-block-content" data-content-type="bulletListItem"><p class="bn-inline-content">Bullet List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="2"><div class="bn-block" data-node-type="blockContainer" data-id="2"><div class="bn-block-content" data-content-type="bulletListItem"><p class="bn-inline-content">Bullet List Item 2</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="3"><div class="bn-block" data-node-type="blockContainer" data-id="3"><div class="bn-block-content" data-content-type="numberedListItem" data-index="null"><p class="bn-inline-content">Numbered List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="4"><div class="bn-block" data-node-type="blockContainer" data-id="4"><div class="bn-block-content" data-content-type="numberedListItem" data-index="null"><p class="bn-inline-content">Numbered List Item 2</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="5"><div class="bn-block" data-node-type="blockContainer" data-id="5"><div class="bn-block-content" data-content-type="checkListItem"><input type="checkbox"><p class="bn-inline-content">Check List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="6"><div class="bn-block" data-node-type="blockContainer" data-id="6"><div class="bn-block-content" data-content-type="checkListItem" data-checked="true"><input type="checkbox" checked=""><p class="bn-inline-content">Check List Item 2</p></div></div></div></div>

packages/core/src/api/exporters/html/__snapshots__/lists/nested/external.html

@@ -0,0 +1 @@
+<ul><li><p class="bn-inline-content">Bullet List Item 1</p></li><li><p class="bn-inline-content">Bullet List Item 2</p><ol><li><p class="bn-inline-content">Numbered List Item 1</p></li><li><p class="bn-inline-content">Numbered List Item 2</p><ul><li><input type="checkbox"><p class="bn-inline-content">Check List Item 1</p></li><li><input type="checkbox" checked><p class="bn-inline-content">Check List Item 2</p></li></ul></li></ol></li></ul>

packages/core/src/api/exporters/html/__snapshots__/lists/nested/internal.html

@@ -0,0 +1 @@
+<div class="bn-block-group" data-node-type="blockGroup"><div class="bn-block-outer" data-node-type="blockOuter" data-id="1"><div class="bn-block" data-node-type="blockContainer" data-id="1"><div class="bn-block-content" data-content-type="bulletListItem"><p class="bn-inline-content">Bullet List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="2"><div class="bn-block" data-node-type="blockContainer" data-id="2"><div class="bn-block-content" data-content-type="bulletListItem"><p class="bn-inline-content">Bullet List Item 2</p></div><div class="bn-block-group" data-node-type="blockGroup"><div class="bn-block-outer" data-node-type="blockOuter" data-id="3"><div class="bn-block" data-node-type="blockContainer" data-id="3"><div class="bn-block-content" data-content-type="numberedListItem" data-index="null"><p class="bn-inline-content">Numbered List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="4"><div class="bn-block" data-node-type="blockContainer" data-id="4"><div class="bn-block-content" data-content-type="numberedListItem" data-index="null"><p class="bn-inline-content">Numbered List Item 2</p></div><div class="bn-block-group" data-node-type="blockGroup"><div class="bn-block-outer" data-node-type="blockOuter" data-id="5"><div class="bn-block" data-node-type="blockContainer" data-id="5"><div class="bn-block-content" data-content-type="checkListItem"><input type="checkbox"><p class="bn-inline-content">Check List Item 1</p></div></div></div><div class="bn-block-outer" data-node-type="blockOuter" data-id="6"><div class="bn-block" data-node-type="blockContainer" data-id="6"><div class="bn-block-content" data-content-type="checkListItem" data-checked="true"><input type="checkbox" checked=""><p class="bn-inline-content">Check List Item 2</p></div></div></div></div></div></div></div></div></div></div>

packages/core/src/api/exporters/html/externalHTMLExporter.ts

@@ -73,7 +73,10 @@ export const createExternalHTMLExporter = <
       .use(rehypeParse, { fragment: true })
       .use(simplifyBlocks, {
         orderedListItemBlockTypes: new Set<string>(["numberedListItem"]),
-        unorderedListItemBlockTypes: new Set<string>(["bulletListItem"]),
+        unorderedListItemBlockTypes: new Set<string>([
+          "bulletListItem",
+          "checkListItem",
+        ]),
       })
       .use(rehypeStringify)
       .processSync(serializeProseMirrorFragment(fragment, serializer));

packages/core/src/api/exporters/html/util/simplifyBlocksRehypePlugin.ts

@@ -98,7 +98,7 @@ export function simplifyBlocks(options: SimplifyBlocksOptions) {
         ) as HASTElement;
 
         // Adds only the content inside the block to the active list.
-        listItemElement.children.push(blockContent.children[0]);
+        listItemElement.children.push(...blockContent.children);
         // Nested blocks have already been processed in the recursive function call, so the resulting elements are
         // also added to the active list.
         if (blockGroup !== null) {

packages/core/src/api/exporters/markdown/__snapshots__/lists/basic/markdown.md

@@ -0,0 +1,8 @@
+*   Bullet List Item 1
+*   Bullet List Item 2
+
+1.  Numbered List Item 1
+2.  Numbered List Item 2
+
+*   \[ ] Check List Item 1
+*   \[x] Check List Item 2

packages/core/src/api/exporters/markdown/__snapshots__/lists/nested/markdown.md

@@ -0,0 +1,10 @@
+*   Bullet List Item 1
+
+*   Bullet List Item 2
+
+    1.  Numbered List Item 1
+
+    2.  Numbered List Item 2
+
+        *   \[ ] Check List Item 1
+        *   \[x] Check List Item 2

packages/core/src/api/exporters/markdown/markdownExporter.ts

@@ -9,11 +9,13 @@ import type { BlockNoteEditor } from "../../../editor/BlockNoteEditor";
 import { BlockSchema, InlineContentSchema, StyleSchema } from "../../../schema";
 import { createExternalHTMLExporter } from "../html/externalHTMLExporter";
 import { removeUnderlines } from "./removeUnderlinesRehypePlugin";
+import { addSpacesToCheckboxes } from "./util/addSpacesToCheckboxesRehypePlugin";
 
 export function cleanHTMLToMarkdown(cleanHTMLString: string) {
   const markdownString = unified()
     .use(rehypeParse, { fragment: true })
     .use(removeUnderlines)
+    .use(addSpacesToCheckboxes)
     .use(rehypeRemark)
     .use(remarkGfm)
     .use(remarkStringify)

packages/core/src/api/exporters/markdown/util/addSpacesToCheckboxesRehypePlugin.ts

@@ -0,0 +1,42 @@
+import { Element as HASTElement, Parent as HASTParent } from "hast";
+import { fromDom } from "hast-util-from-dom";
+
+/**
+ * Rehype plugin which adds a space after each checkbox input element. This is
+ * because remark doesn't add any spaces between the checkbox input and the text
+ * itself, but these are needed for correct Markdown syntax.
+ */
+export function addSpacesToCheckboxes() {
+  const helper = (tree: HASTParent) => {
+    if (tree.children && "length" in tree.children && tree.children.length) {
+      for (let i = tree.children.length - 1; i >= 0; i--) {
+        const child = tree.children[i];
+        const nextChild =
+          i + 1 < tree.children.length ? tree.children[i + 1] : undefined;
+
+        // Checks for paragraph element after checkbox input element.
+        if (
+          child.type === "element" &&
+          child.tagName === "input" &&
+          child.properties?.type === "checkbox" &&
+          nextChild?.type === "element" &&
+          nextChild.tagName === "p"
+        ) {
+          // Converts paragraph to span, otherwise remark will think it needs to
+          // be on a new line.
+          nextChild.tagName = "span";
+          // Adds a space after the checkbox input element.
+          nextChild.children.splice(
+            0,
+            0,
+            fromDom(document.createTextNode(" ")) as HASTElement
+          );
+        } else {
+          helper(child as HASTParent);
+        }
+      }
+    }
+  };
+
+  return helper;
+}