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import GObject from "gi://GObject"
export { default as GLib } from "gi://GLib?version=2.0"
export { GObject, GObject as default }
const meta = Symbol("meta")
const priv = Symbol("priv")
const { ParamSpec, ParamFlags } = GObject
const kebabify = (str: string) => str
.replace(/([a-z])([A-Z])/g, "$1-$2")
.replaceAll("_", "-")
.toLowerCase()
type SignalDeclaration = {
flags?: GObject.SignalFlags
accumulator?: GObject.AccumulatorType
return_type?: GObject.GType
param_types?: Array<GObject.GType>
}
type PropertyDeclaration =
| InstanceType<typeof GObject.ParamSpec>
| { $gtype: GObject.GType }
| typeof String
| typeof Number
| typeof Boolean
| typeof Object
type GObjectConstructor = {
[meta]?: {
Properties?: { [key: string]: GObject.ParamSpec }
Signals?: { [key: string]: GObject.SignalDefinition }
}
new(...args: any[]): any
}
type MetaInfo = GObject.MetaInfo<never, Array<{ $gtype: GObject.GType }>, never>
export function register(options: MetaInfo = {}) {
return function (cls: GObjectConstructor) {
const t = options.Template
if (typeof t === "string" && !t.startsWith("resource://") && !t.startsWith("file://")) {
// assume xml template
options.Template = new TextEncoder().encode(t)
}
GObject.registerClass({
Signals: { ...cls[meta]?.Signals },
Properties: { ...cls[meta]?.Properties },
...options,
}, cls)
delete cls[meta]
}
}
export function property(declaration: PropertyDeclaration = Object) {
return function (target: any, prop: any, desc?: PropertyDescriptor) {
target.constructor[meta] ??= {}
target.constructor[meta].Properties ??= {}
const name = kebabify(prop)
if (!desc) {
Object.defineProperty(target, prop, {
get() {
return this[priv]?.[prop] ?? defaultValue(declaration)
},
set(v: any) {
if (v !== this[prop]) {
this[priv] ??= {}
this[priv][prop] = v
this.notify(name)
}
},
})
Object.defineProperty(target, `set_${name.replace("-", "_")}`, {
value(v: any) {
this[prop] = v
},
})
Object.defineProperty(target, `get_${name.replace("-", "_")}`, {
value() {
return this[prop]
},
})
target.constructor[meta].Properties[kebabify(prop)] = pspec(name, ParamFlags.READWRITE, declaration)
} else {
let flags = 0
if (desc.get) flags |= ParamFlags.READABLE
if (desc.set) flags |= ParamFlags.WRITABLE
target.constructor[meta].Properties[kebabify(prop)] = pspec(name, flags, declaration)
}
}
}
export function signal(...params: Array<{ $gtype: GObject.GType } | typeof Object>):
(target: any, signal: any, desc?: PropertyDescriptor) => void
export function signal(declaration?: SignalDeclaration):
(target: any, signal: any, desc?: PropertyDescriptor) => void
export function signal(
declaration?: SignalDeclaration | { $gtype: GObject.GType } | typeof Object,
...params: Array<{ $gtype: GObject.GType } | typeof Object>
) {
return function (target: any, signal: any, desc?: PropertyDescriptor) {
target.constructor[meta] ??= {}
target.constructor[meta].Signals ??= {}
const name = kebabify(signal)
if (declaration || params.length > 0) {
// @ts-expect-error TODO: type assert
const arr = [declaration, ...params].map(v => v.$gtype)
target.constructor[meta].Signals[name] = {
param_types: arr,
}
} else {
target.constructor[meta].Signals[name] = declaration || {
param_types: [],
}
}
if (!desc) {
Object.defineProperty(target, signal, {
value: function (...args: any[]) {
this.emit(name, ...args)
},
})
} else {
const og: ((...args: any[]) => void) = desc.value
desc.value = function (...args: any[]) {
// @ts-expect-error not typed
this.emit(name, ...args)
}
Object.defineProperty(target, `on_${name.replace("-", "_")}`, {
value: function (...args: any[]) {
return og.apply(this, args)
},
})
}
}
}
function pspec(name: string, flags: number, declaration: PropertyDeclaration) {
if (declaration instanceof ParamSpec)
return declaration
switch (declaration) {
case String:
return ParamSpec.string(name, "", "", flags, "")
case Number:
return ParamSpec.double(name, "", "", flags, -Number.MAX_VALUE, Number.MAX_VALUE, 0)
case Boolean:
return ParamSpec.boolean(name, "", "", flags, false)
case Object:
return ParamSpec.jsobject(name, "", "", flags)
default:
// @ts-expect-error misstyped
return ParamSpec.object(name, "", "", flags, declaration.$gtype)
}
}
function defaultValue(declaration: PropertyDeclaration) {
if (declaration instanceof ParamSpec)
return declaration.get_default_value()
switch (declaration) {
case String:
return ""
case Number:
return 0
case Boolean:
return false
case Object:
default:
return null
}
}
|
