the claude code sourcemaps leaked march 31
1/**
2 * Vim Motion Functions
3 *
4 * Pure functions for resolving vim motions to cursor positions.
5 */
6
7import type { Cursor } from '../utils/Cursor.js'
8
9/**
10 * Resolve a motion to a target cursor position.
11 * Does not modify anything - pure calculation.
12 */
13export function resolveMotion(
14 key: string,
15 cursor: Cursor,
16 count: number,
17): Cursor {
18 let result = cursor
19 for (let i = 0; i < count; i++) {
20 const next = applySingleMotion(key, result)
21 if (next.equals(result)) break
22 result = next
23 }
24 return result
25}
26
27/**
28 * Apply a single motion step.
29 */
30function applySingleMotion(key: string, cursor: Cursor): Cursor {
31 switch (key) {
32 case 'h':
33 return cursor.left()
34 case 'l':
35 return cursor.right()
36 case 'j':
37 return cursor.downLogicalLine()
38 case 'k':
39 return cursor.upLogicalLine()
40 case 'gj':
41 return cursor.down()
42 case 'gk':
43 return cursor.up()
44 case 'w':
45 return cursor.nextVimWord()
46 case 'b':
47 return cursor.prevVimWord()
48 case 'e':
49 return cursor.endOfVimWord()
50 case 'W':
51 return cursor.nextWORD()
52 case 'B':
53 return cursor.prevWORD()
54 case 'E':
55 return cursor.endOfWORD()
56 case '0':
57 return cursor.startOfLogicalLine()
58 case '^':
59 return cursor.firstNonBlankInLogicalLine()
60 case '$':
61 return cursor.endOfLogicalLine()
62 case 'G':
63 return cursor.startOfLastLine()
64 default:
65 return cursor
66 }
67}
68
69/**
70 * Check if a motion is inclusive (includes character at destination).
71 */
72export function isInclusiveMotion(key: string): boolean {
73 return 'eE$'.includes(key)
74}
75
76/**
77 * Check if a motion is linewise (operates on full lines when used with operators).
78 * Note: gj/gk are characterwise exclusive per `:help gj`, not linewise.
79 */
80export function isLinewiseMotion(key: string): boolean {
81 return 'jkG'.includes(key) || key === 'gg'
82}