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keymap.shared.ts
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154 lines (135 loc) · 3.37 KB
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import { KeyEvent } from "@opentui/core"
import { Keymap, type Binding, type KeySequencePart } from "@opentui/keymap"
import { registerDefaultKeys, registerLeader } from "@opentui/keymap/addons"
import { formatCommandBindings, formatKeySequence } from "@opentui/keymap/extras"
type ParsedBindingInput = Pick<Binding, "key" | "event">
export type ParsedBinding = {
sequence: KeySequencePart[]
event: "press" | "release"
}
const keyNameAliases = {
delete: "del",
enter: "return",
escape: "esc",
pagedown: "pgdn",
pageup: "pgup",
} as const
const modifierAliases = {
meta: "alt",
} as const
function hostPlatform() {
if (process.platform === "darwin") {
return "macos" as const
}
if (process.platform === "win32") {
return "windows" as const
}
if (process.platform === "linux") {
return "linux" as const
}
return "unknown" as const
}
function createCommandEvent() {
return new KeyEvent({
name: "command",
ctrl: false,
meta: false,
shift: false,
option: false,
sequence: "",
number: false,
raw: "",
eventType: "press",
source: "raw",
})
}
function createParser(leader: string) {
const platform = hostPlatform()
const keymap = new Keymap({
metadata: {
platform,
primaryModifier: platform === "macos" ? "super" : platform === "unknown" ? "unknown" : "ctrl",
modifiers: {
ctrl: "supported",
shift: "supported",
meta: "supported",
super: "unknown",
hyper: "unknown",
},
},
rootTarget: {},
isDestroyed: false,
getFocusedTarget() {
return null
},
getParentTarget(_target) {
return null
},
isTargetDestroyed(_target) {
return false
},
onKeyPress(_listener) {
return () => {}
},
onKeyRelease(_listener) {
return () => {}
},
onFocusChange(_listener) {
return () => {}
},
onTargetDestroy(_target, _listener) {
return () => {}
},
createCommandEvent,
})
const offDefault = registerDefaultKeys(keymap)
const offLeader = registerLeader(keymap, { trigger: leader })
return {
keymap,
dispose() {
offLeader()
offDefault()
},
}
}
function formatOptions(leader: string) {
return {
tokenDisplay: {
leader,
},
keyNameAliases,
modifierAliases,
} as const
}
function splitBinding(binding: ParsedBindingInput) {
if (typeof binding.key !== "string" || !binding.key.includes(",")) {
return [binding]
}
return binding.key
.split(",")
.map((key) => key.trim())
.filter(Boolean)
.map((key) => ({
...binding,
key,
}))
}
export function parseBindings(bindings: readonly ParsedBindingInput[], leader: string): ParsedBinding[] {
const parser = createParser(leader)
try {
return bindings.flatMap((binding) =>
splitBinding(binding).map((item) => ({
sequence: Array.from(parser.keymap.parseKeySequence(item.key)),
event: item.event ?? "press",
})),
)
} finally {
parser.dispose()
}
}
export function formatBinding(bindings: readonly ParsedBindingInput[], leader: string) {
return formatKeySequence(parseBindings(bindings, leader)[0]?.sequence, formatOptions(leader))
}
export function formatBindings(bindings: readonly ParsedBindingInput[], leader: string) {
return formatCommandBindings(parseBindings(bindings, leader), formatOptions(leader))
}