trimmedRange() — drizzle-orm Function Reference

Architecture documentation for the trimmedRange() function in views.ts from the drizzle-orm codebase.

Function typescript DrizzleKit Introspection called by 1

Entity Profile

DrizzleKit→ Introspection→ trimmedRange() — drizzle-orm Function Reference

Dependency Diagram

graph TD
  8c73740c_ec23_fcc8_175c_f81fe951dd2b["trimmedRange()"]
  217e2cbd_4fb7_ceab_251c_5733ece08a8f["views.ts"]
  8c73740c_ec23_fcc8_175c_f81fe951dd2b -->|defined in| 217e2cbd_4fb7_ceab_251c_5733ece08a8f
  5300a679_d9ea_0981_226a_556588f8f2d0["render()"]
  5300a679_d9ea_0981_226a_556588f8f2d0 -->|calls| 8c73740c_ec23_fcc8_175c_f81fe951dd2b
  style 8c73740c_ec23_fcc8_175c_f81fe951dd2b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-kit/src/cli/views.ts lines 627–658

export const trimmedRange = <T>(
	arr: T[],
	index: number,
	limitLines: number,
): {
	trimmed: T[];
	offset: number;
	startTrimmed: boolean;
	endTrimmed: boolean;
} => {
	const limit = limitLines - 2;
	const sideLimit = Math.round(limit / 2);

	const endTrimmed = arr.length - sideLimit > index;
	const startTrimmed = index > sideLimit - 1;

	const paddingStart = Math.max(index + sideLimit - arr.length, 0);
	const paddingEnd = Math.min(index - sideLimit + 1, 0);

	const d1 = endTrimmed ? 1 : 0;
	const d2 = startTrimmed ? 0 : 1;

	const start = Math.max(0, index - sideLimit + d1 - paddingStart);
	const end = Math.min(arr.length, index + sideLimit + d2 - paddingEnd);

	return {
		trimmed: arr.slice(start, end),
		offset: start,
		startTrimmed,
		endTrimmed,
	};
};