chore: merge blocksuite source code (#9213)

blocksuite/framework/inline/src/utils/delta-convert.ts

@@ -0,0 +1,64 @@
+import type { DeltaInsert } from '../types.js';
+import type { BaseTextAttributes } from './base-attributes.js';
+
+export function transformDelta<TextAttributes extends BaseTextAttributes>(
+  delta: DeltaInsert<TextAttributes>
+): (DeltaInsert<TextAttributes> | '\n')[] {
+  const result: (DeltaInsert<TextAttributes> | '\n')[] = [];
+
+  let tmpString = delta.insert;
+  while (tmpString.length > 0) {
+    const index = tmpString.indexOf('\n');
+    if (index === -1) {
+      result.push({
+        insert: tmpString,
+        attributes: delta.attributes,
+      });
+      break;
+    }
+
+    if (tmpString.slice(0, index).length > 0) {
+      result.push({
+        insert: tmpString.slice(0, index),
+        attributes: delta.attributes,
+      });
+    }
+
+    result.push('\n');
+    tmpString = tmpString.slice(index + 1);
+  }
+
+  return result;
+}
+
+/**
+ * convert a delta insert array to chunks, each chunk is a line
+ */
+export function deltaInsertsToChunks<TextAttributes extends BaseTextAttributes>(
+  delta: DeltaInsert<TextAttributes>[]
+): DeltaInsert<TextAttributes>[][] {
+  if (delta.length === 0) {
+    return [[]];
+  }
+
+  const transformedDelta = delta.flatMap(transformDelta);
+
+  function* chunksGenerator(arr: (DeltaInsert<TextAttributes> | '\n')[]) {
+    let start = 0;
+    for (let i = 0; i < arr.length; i++) {
+      if (arr[i] === '\n') {
+        const chunk = arr.slice(start, i);
+        start = i + 1;
+        yield chunk as DeltaInsert<TextAttributes>[];
+      } else if (i === arr.length - 1) {
+        yield arr.slice(start) as DeltaInsert<TextAttributes>[];
+      }
+    }
+
+    if (arr.at(-1) === '\n') {
+      yield [];
+    }
+  }
+
+  return Array.from(chunksGenerator(transformedDelta));
+}