refactor(editor): move export manager to surface block extensions (#10231)

blocksuite/affine/block-surface/src/utils/get-bg-grip-gap.ts

@@ -0,0 +1,10 @@
+import { clamp } from '@blocksuite/global/utils';
+
+import { GRID_GAP_MAX, GRID_GAP_MIN } from '../consts';
+
+export function getBgGridGap(zoom: number) {
+  const step = zoom < 0.5 ? 2 : 1 / (Math.floor(zoom) || 1);
+  const gap = clamp(20 * step * zoom, GRID_GAP_MIN, GRID_GAP_MAX);
+
+  return gap;
+}

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

@@ -34,6 +34,7 @@ export function normalizeWheelDeltaY(delta: number, zoom = 1) {
 }
 
 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';