4

相关代码块：

        <Slate editor={editor} value={value} onChange={value => {
            setValue(value);

            const { selection } = editor;
            // if nothing is currently selected under the cursor
            if (selection && Range.isCollapsed(selection)) {
                const [start] = Range.edges(selection);
                // if the two characters beforce the cursor are {{, select them and replace with a template block
                const before = Editor.before(editor, start, {distance: 2})
                const beforeRange = before && Editor.range(editor, before, start)
                const beforeText = beforeRange && Editor.string(editor, beforeRange)
                const beforeMatch = beforeText && beforeText.match(/\{\{/);
                if (beforeMatch) {
                    Transforms.select(editor, beforeRange as Location);
                    insertTemplateBlock(editor, {name: "test"})
                }
            }
        }}>
...
</Slate>

export const insertTemplateBlock = (editor: Editor, {name, opts, defaultValue}: TemplateBlockProps) => {
    const templateBlock = { type: "template-block", name, opts, defaultValue, children: [{text: ''}] }
    Transforms.insertNodes(editor, templateBlock);
    Transforms.move(editor);
}

具体来说，它总是在insertTemplateBlock函数的第二行中断，并给出如下错误：

Cannot find a descendant at path [0,2] in node: {"children":[{"type":"paragraph","children":[{"text":"Thing is working {{"}]}],"operations":[{"type":"insert_text","path":[0,0],"offset":18,"text":"{"},{"type":"set_selection","properties":{"anchor":{"path":[0,0],"offset":19}},"newProperties":{"anchor":{"path":[0,0],"offset":17}}},{"type":"remove_text","path":[0,0],"offset":17,"text":"{{"},{"type":"insert_node","path":[0,1],"node":{"type":"template-block","name":"test","children":[{"text":""}]}},{"type":"set_selection","properties":{"anchor":{"path":[0,0],"offset":17},"focus":{"path":[0,0],"offset":17}},"newProperties":{"anchor":{"path":[0,1,0],"offset":0},"focus":{"path":[0,1,0],"offset":0}}},{"type":"insert_node","path":[0,2],"node":{"text":""}},{"type":"set_selection","properties":{"anchor":{"path":[0,1,0],"offset":0},"focus":{"path":[0,1,0],"offset":0}},"newProperties":{"anchor":{"path":[0,2],"offset":0},"focus":{"path":[0,2],"offset":0}}}],"selection":{"anchor":{"path":[0,2],"offset":0},"focus":{"path":[0,2],"offset":0}},"marks":null,"history":{"undos":[[{"type":"set_selection","properties":null,"newProperties":{"anchor":{"path":[0,0],"offset":0},"focus":{"path":[0,0],"offset":0}}}],[{"type":"insert_text","path":[0,0],"offset":0,"text":"T"},{"type":"insert_text","path":[0,0],"offset":1,"text":"h"},{"type":"insert_text","path":[0,0],"offset":2,"text":"i"},{"type":"insert_text","path":[0,0],"offset":3,"text":"n"},{"type":"insert_text","path":[0,0],"offset":4,"text":"g"},{"type":"insert_text","path":[0,0],"offset":5,"text":" "},{"type":"insert_text","path":[0,0],"offset":6,"text":"i"},{"type":"insert_text","path":[0,0],"offset":7,"text":"s"},{"type":"insert_text","path":[0,0],"offset":8,"text":" "},{"type":"insert_text","path":[0,0],"offset":9,"text":"w"},{"type":"insert_text","path":[0,0],"offset":10,"text":"o"},{"type":"insert_text","path":[0,0],"offset":11,"text":"r"},{"type":"insert_text","path":[0,0],"offset":12,"text":"k"},{"type":"insert_text","path":[0,0],"offset":13,"text":"i"},{"type":"insert_text","path":[0,0],"offset":14,"text":"n"},{"type":"insert_text","path":[0,0],"offset":15,"text":"g"},{"type":"insert_text","path":[0,0],"offset":16,"text":" "},{"type":"set_selection","properties":null,"newProperties":{"anchor":{"path":[0,0],"offset":17},"focus":{"path":[0,0],"offset":17}}}],[{"type":"insert_text","path":[0,0],"offset":17,"text":"{"},{"type":"insert_text","path":[0,0],"offset":18,"text":"{"},{"type":"set_selection","properties":{"anchor":{"path":[0,0],"offset":19}},"newProperties":{"anchor":{"path":[0,0],"offset":17}}},{"type":"remove_text","path":[0,0],"offset":17,"text":"{{"},{"type":"insert_node","path":[0,1],"node":{"type":"template-block","name":"test","children":[{"text":""}]}},{"type":"set_selection","properties":{"anchor":{"path":[0,0],"offset":17},"focus":{"path":[0,0],"offset":17}},"newProperties":{"anchor":{"path":[0,1,0],"offset":0},"focus":{"path":[0,1,0],"offset":0}}},{"type":"insert_node","path":[0,2],"node":{"text":""}},{"type":"set_selection","properties":{"anchor":{"path":[0,1,0],"offset":0},"focus":{"path":[0,1,0],"offset":0}},"newProperties":{"anchor":{"path":[0,2],"offset":0},"focus":{"path":[0,2],"offset":0}}}]],"redos":[]}}

这在他们提到的例子中没有发生，它使用了类似的逻辑。任何帮助，将不胜感激！

Codesandbox：https ://codesandbox.io/s/elastic-turing-dv9bm?file=/src/App.tsx

更新：我发现这个问题可以通过将插入逻辑（当前在 if 语句中）移动到一个useEffect挂钩来避免，具体取决于target包含选择的值，类似于 Slate 的提及示例的工作方式。但是，我仍然很想知道为什么 Slate 会像我以问题陈述的方式编写它时那样中断。

4

2 回答 2

3

该问题与您使用时的渲染有关useMemo，您应该使用useRef：

const editorRef = useRef()
if (!editorRef.current) editorRef.current = withReact(createEditor())
const editor = editorRef.current

https://github.com/ianstormtaylor/slate/issues/4081

于 2021-04-16T14:12:39.893 回答
0

我认为您的问题源于<Slate>上下文提供者这一事实，您实际上应该使用嵌套<Editable>组件来处理事件 - 在您的情况下onKeyDown。Editable在您提到的具体示例中，我相信您遇到了嵌套组件不会发生的竞争条件。请参阅文档中演练下的安装 Slate 。

https://docs.slatejs.org/walkthroughs/01-installing-slate

于 2021-01-25T22:40:04.260 回答