@wonderwhy-er/desktop-commander
Version:
MCP server for terminal operations and file editing
35 lines (34 loc) • 1.27 kB
JavaScript
/**
* Normalize page indexes, handling negative indices and removing duplicates
*/
export const normalizePageIndexes = (pageIndexes, pageCount) => {
const normalizedIndexes = pageIndexes
.map(idx => idx < 0 ? pageCount + idx : idx)
.filter(idx => idx >= 0 && idx < pageCount);
// Use Set to remove duplicates
return [...new Set(normalizedIndexes)];
};
/**
* Generate page numbers based on offset and length
* @param offset Zero-based offset or negative for counting from end
* @param length Number of pages to generate
* @param totalPages Total number of pages in the document
* @returns Array of page numbers
*/
export function generatePageNumbers(offset, length, totalPages) {
// Compute 1-based start page
const startPage = offset < 0
? totalPages + offset + 1
: offset + 1;
// Clamp start page
if (startPage > totalPages)
return [];
const safeStart = Math.max(1, startPage);
// Compute final page (inclusive), truncated by totalPages
const endPage = Math.min(safeStart + length - 1, totalPages);
const count = endPage - safeStart + 1;
if (count <= 0)
return [];
// Preallocate array for speed
return Array.from({ length: count }, (_, i) => safeStart + i);
}