fix: indicator of the task list.

See #2018.

Use tiptap TaskList and TaskItem.

Markdown-it happily mixes tasks and bullet points in the same list.
Tiptap lists are strictly separated.

Split bullet and tasks into BulletList and TaskList in markdown-io.

Just like this will turn into three different lists:

* one
- two
+ three

This will now also turn into three different lists
with the middle one being a task list:

* first list
* [ ] todo
* [x] done
* third list

Signed-off-by: Max <max@nextcloud.com>

3 files changed, 117 insertions, 26 deletions

diff --git a/cypress/fixtures/ListItem.md b/cypress/fixtures/ListItem.md
index 97ff201f8..7e59ca711 100644
--- a/cypress/fixtures/ListItem.md
+++ b/cypress/fixtures/ListItem.md
@@ -1,62 +1,121 @@
-## creates todo lists
+## Keeps homogeneous lists together 
 
-* todo\_item
+* foo
+* bar
+
+1. one
+2. two
+
+* [ ] todo
+* [x] done
+
+---
+
+* foo
+* bar
+
+1. one
+2. two
+
+* [ ] todo
+* [x] done
+
+## Splits mixed lists with empty lines
+
+* foo
+* bar
+* [ ] todo
+* [x] done
+1. one
+2. two
+
+---
+
+* foo
+* bar
+
+* [ ] todo
+* [x] done
+
+1. one
+2. two
+
+## bullet list to task list
+
+* toggleTaskList
+* keep
 
 ---
 
-* [ ] todo\_item
+* [ ] did toggleTaskList
+
+* keep
 
-## removes the list when toggling todo off
+## bullet list to ordered list
 
-* [ ] todo\_item
+* toggleOrderedList
+* keep
 
 ---
 
-todo\_item
+1. did toggleOrderedList
+2. keep
+
+
+## removes the list when toggling task off
+
+* [ ] toggleTaskList
+
+---
+
+did toggleTaskList
 
 ## creates a bullet list
 
-bulletListItem
+toggleBulletList
 
 ---
 
-* bulletListItem
+* did toggleBulletList
 
-## only toggles one list item
+## Splits bullet list when turning one item into task
 
-* todo\_item
+* toggleTaskList
 * not todo
 
 ---
 
-* [ ] todo\_item
+* [ ] did toggleTaskList
+
 * not todo
 
 ## toggles two list items separately
 
-* todo\_item
+* toggleTaskList
 * not todo
-* todo\_item
+* toggleTaskList
 
 ---
 
-* [ ] todo\_item
+* [ ] did toggleTaskList
+
 * not todo
-* [ ] todo\_item
 
-## toggle off todo list item should turn it into normal list item
+* [ ] did toggleTaskList
+
+## toggle off task list item should turn it into normal list item
 
 * not todo
-* [ ] todo\_item
+* [ ] toggleTaskList
 
 ---
 
 * not todo
 
-todo\_item
+did toggleTaskList
 
 ---
 
 * not todo
-* todo\_item
+* toggleTaskList
 
diff --git a/cypress/integration/ListItem.spec.js b/cypress/integration/ListItem.spec.js
index dd0c95a87..c45a8b2cc 100644
--- a/cypress/integration/ListItem.spec.js
+++ b/cypress/integration/ListItem.spec.js
@@ -1,5 +1,8 @@
+import OrderedList from '@tiptap/extension-ordered-list'
+import ListItem from '@tiptap/extension-list-item'
+import TaskList from './../../src/nodes/TaskList'
+import TaskItem from './../../src/nodes/TaskItem'
 import BulletList from './../../src/nodes/BulletList'
-import ListItem from './../../src/nodes/ListItem'
 import Markdown from './../../src/extensions/Markdown'
 import markdownit from './../../src/markdownit'
 import { createMarkdownSerializer } from './../../src/extensions/Markdown';
@@ -11,7 +14,14 @@ describe('ListItem extension integrated in the editor', () => {
 
 	const editor = createEditor({
 		content: '',
-		extensions: [Markdown, BulletList, ListItem],
+		extensions: [
+			Markdown,
+			BulletList,
+			OrderedList,
+			ListItem,
+			TaskList,
+			TaskItem,
+		],
 	})
 
 	for (const spec of testData.split(/#+\s+/)){
@@ -36,18 +46,21 @@ describe('ListItem extension integrated in the editor', () => {
 	}
 
 	function runCommands() {
-		for (const { node, pos } of findCommands()) {
-			const command = node.text
+		let found
+		while (found = findCommand()) {
+			const { node, pos } = found
+			const name = node.text
 			editor.commands.setTextSelection(pos)
-			editor.commands[command]()
+			editor.commands[name]()
+			editor.commands.insertContent('did ')
 		}
 	}
 
-	function findCommands() {
+	function findCommand() {
 		const doc = editor.state.doc
 		return findChildren(doc, child => {
 			return child.isText && editor.commands.hasOwnProperty(child.text)
-		})
+		})[0]
 	}
 
 	function expectMarkdown(markdown) {
diff --git a/cypress/integration/workspace.spec.js b/cypress/integration/workspace.spec.js
index efa3e5953..01829cd7c 100644
--- a/cypress/integration/workspace.spec.js
+++ b/cypress/integration/workspace.spec.js
@@ -104,6 +104,25 @@ describe('Workspace', function() {
 		})
 	})
 
+	it('creates lists', function() {
+		openWorkspace()
+			.type('List me')
+			.type('{selectall}')
+		;[
+			['ul', 'ul'],
+			['ol', 'ol'],
+			['checkmark', 'ul[data-type="taskList"]'],
+		].forEach(([button, tag]) => {
+			menuButton(button)
+				.click()
+				.should('have.class', 'is-active')
+			cy.get(`.ProseMirror ${tag}`).should('contain', 'List me')
+			menuButton(button)
+				.click()
+				.should('not.have.class', 'is-active')
+		})
+	})
+
 	it('takes README.md into account', function() {
 		cy.uploadFile('test.md', 'text/markdown', `${Cypress.currentTest.title}/README.md`)
 		cy.reload()