chore(editor): reorg packages (#10702)

blocksuite/affine/blocks/block-surface/src/utils/index.ts

@@ -0,0 +1,40 @@
+import { nanoid } from 'nanoid';
+
+import { ZOOM_WHEEL_STEP } from '../consts.js';
+
+export { generateKeyBetween, generateNKeysBetween } from 'fractional-indexing';
+
+export function generateElementId() {
+  return nanoid(10);
+}
+
+/**
+ * Normalizes wheel delta.
+ *
+ * See https://stackoverflow.com/a/13650579
+ *
+ * From https://github.com/excalidraw/excalidraw/blob/master/src/components/App.tsx
+ * MIT License
+ */
+export function normalizeWheelDeltaY(delta: number, zoom = 1) {
+  const sign = Math.sign(delta);
+  const abs = Math.abs(delta);
+  const maxStep = ZOOM_WHEEL_STEP * 100;
+  if (abs > maxStep) {
+    delta = maxStep * sign;
+  }
+  let newZoom = zoom - delta / 100;
+  // increase zoom steps the more zoomed-in we are (applies to >100% only)
+  newZoom +=
+    Math.log10(Math.max(1, zoom)) *
+    -sign *
+    // reduced amplification for small deltas (small movements on a trackpad)
+    Math.min(1, abs / 20);
+  return newZoom;
+}
+
+export { addNote, addNoteAtPoint } from './add-note';
+export { getBgGridGap } from './get-bg-grip-gap';
+export { getLastPropsKey } from './get-last-props-key';
+export { getSurfaceBlock } from './get-surface-block';
+export * from './mindmap/style-svg.js';