chore(editor): reorg packages (#10702)

blocksuite/affine/blocks/block-paragraph/src/commands/split-paragraph.ts

@@ -0,0 +1,81 @@
+import { ParagraphBlockModel } from '@blocksuite/affine-model';
+import {
+  focusTextModel,
+  getInlineEditorByModel,
+} from '@blocksuite/affine-rich-text';
+import { matchModels } from '@blocksuite/affine-shared/utils';
+import { type Command, TextSelection } from '@blocksuite/block-std';
+
+export const splitParagraphCommand: Command<
+  {
+    blockId?: string;
+  },
+  {
+    paragraphConvertedId: string;
+  }
+> = (ctx, next) => {
+  const { std } = ctx;
+  const { store, host, selection } = std;
+  let blockId = ctx.blockId;
+  if (!blockId) {
+    const text = selection.find(TextSelection);
+    blockId = text?.blockId;
+  }
+  if (!blockId) return;
+
+  const model = store.getBlock(blockId)?.model;
+  if (!model || !matchModels(model, [ParagraphBlockModel])) return;
+
+  const inlineEditor = getInlineEditorByModel(host, model);
+  const range = inlineEditor?.getInlineRange();
+  if (!range) return;
+
+  const splitIndex = range.index;
+  const splitLength = range.length;
+  // On press enter, it may convert symbols from yjs ContentString
+  // to yjs ContentFormat. Once it happens, the converted symbol will
+  // be deleted and not counted as model.text.yText.length.
+  // Example: "`a`[enter]" -> yText[<ContentFormat: Code>, "a", <ContentFormat: Code>]
+  // In this case, we should not split the block.
+  if (model.text.yText.length < splitIndex + splitLength) return;
+
+  if (model.children.length > 0 && splitIndex > 0) {
+    store.captureSync();
+    const right = model.text.split(splitIndex, splitLength);
+    const id = store.addBlock(
+      model.flavour,
+      {
+        text: right,
+        type: model.type,
+      },
+      model,
+      0
+    );
+    focusTextModel(std, id);
+    return next({ paragraphConvertedId: id });
+  }
+
+  const parent = store.getParent(model);
+  if (!parent) return;
+  const index = parent.children.indexOf(model);
+  if (index < 0) return;
+  store.captureSync();
+  const right = model.text.split(splitIndex, splitLength);
+  const id = store.addBlock(
+    model.flavour,
+    {
+      text: right,
+      type: model.type,
+    },
+    parent,
+    index + 1
+  );
+  const newModel = store.getBlock(id)?.model;
+  if (newModel) {
+    store.moveBlocks(model.children, newModel);
+  } else {
+    console.error('Failed to find the new model split from the paragraph');
+  }
+  focusTextModel(std, id);
+  return next({ paragraphConvertedId: id });
+};