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import { noImplicitDestroy, setChildren, type BindableProps, construct } from "../_astal.js"
import Gtk from "gi://Gtk?version=4.0"
import Gdk from "gi://Gdk?version=4.0"
import Binding from "../binding.js"
export const type = Symbol("child type")
const dummyBulder = new Gtk.Builder
function _getChildren(widget: Gtk.Widget): Array<Gtk.Widget> {
if ("get_child" in widget && typeof widget.get_child == "function") {
return widget.get_child() ? [widget.get_child()] : []
}
const children: Array<Gtk.Widget> = []
let ch = widget.get_first_child()
while (ch !== null) {
children.push(ch)
ch = ch.get_next_sibling()
}
return children
}
function _setChildren(widget: Gtk.Widget, children: any[]) {
children = children.flat(Infinity).map(ch => ch instanceof Gtk.Widget
? ch
: new Gtk.Label({ visible: true, label: String(ch) }))
for (const child of children) {
widget.vfunc_add_child(
dummyBulder,
child,
type in child ? child[type] : null,
)
}
}
type Config<T extends Gtk.Widget> = {
setChildren(widget: T, children: any[]): void
getChildren(widget: T): Array<Gtk.Widget>
}
export default function astalify<
Widget extends Gtk.Widget,
Props extends Gtk.Widget.ConstructorProps = Gtk.Widget.ConstructorProps,
Signals extends Record<`on${string}`, Array<unknown>> = Record<`on${string}`, any[]>,
>(cls: { new(...args: any[]): Widget }, config: Partial<Config<Widget>> = {}) {
Object.assign(cls.prototype, {
[setChildren](children: any[]) {
const w = this as unknown as Widget
for (const child of (config.getChildren?.(w) || _getChildren(w))) {
if (child instanceof Gtk.Widget) {
child.unparent()
if (!children.includes(child) && noImplicitDestroy in this)
child.run_dispose()
}
}
if (config.setChildren) {
config.setChildren(w, children)
} else {
_setChildren(w, children)
}
},
})
return {
[cls.name]: (
props: ConstructProps<Widget, Props, Signals> = {},
...children: any[]
): Widget => {
const widget = new cls("cssName" in props ? { cssName: props.cssName } : {})
if ("cssName" in props) {
delete props.cssName
}
if (props.noImplicitDestroy) {
Object.assign(widget, { [noImplicitDestroy]: true })
delete props.noImplicitDestroy
}
if (props.type) {
Object.assign(widget, { [type]: props.type })
delete props.type
}
if (children.length > 0) {
Object.assign(props, { children })
}
return construct(widget as any, setupControllers(widget, props as any))
},
}[cls.name]
}
type SigHandler<
W extends InstanceType<typeof Gtk.Widget>,
Args extends Array<unknown>,
> = ((self: W, ...args: Args) => unknown) | string | string[]
export { BindableProps }
export type BindableChild = Gtk.Widget | Binding<Gtk.Widget>
export type ConstructProps<
Self extends InstanceType<typeof Gtk.Widget>,
Props extends Gtk.Widget.ConstructorProps,
Signals extends Record<`on${string}`, Array<unknown>> = Record<`on${string}`, any[]>,
> = Partial<{
// @ts-expect-error can't assign to unknown, but it works as expected though
[S in keyof Signals]: SigHandler<Self, Signals[S]>
}> & Partial<{
[Key in `on${string}`]: SigHandler<Self, any[]>
}> & Partial<BindableProps<Omit<Props, "cssName" | "css_name">>> & {
noImplicitDestroy?: true
type?: string
cssName?: string
} & EventController<Self> & {
onDestroy?: (self: Self) => unknown
setup?: (self: Self) => void
}
type EventController<Self extends Gtk.Widget> = {
onFocusEnter?: (self: Self) => void
onFocusLeave?: (self: Self) => void
onKeyPressed?: (self: Self, keyval: number, keycode: number, state: Gdk.ModifierType) => void
onKeyReleased?: (self: Self, keyval: number, keycode: number, state: Gdk.ModifierType) => void
onKeyModifier?: (self: Self, state: Gdk.ModifierType) => void
onLegacy?: (self: Self, event: Gdk.Event) => void
onButtonPressed?: (self: Self, state: Gdk.ButtonEvent) => void
onButtonReleased?: (self: Self, state: Gdk.ButtonEvent) => void
onHoverEnter?: (self: Self, x: number, y: number) => void
onHoverLeave?: (self: Self) => void
onMotion?: (self: Self, x: number, y: number) => void
onScroll?: (self: Self, dx: number, dy: number) => void
onScrollDecelerate?: (self: Self, vel_x: number, vel_y: number) => void
}
function setupControllers<T>(widget: Gtk.Widget, {
onFocusEnter,
onFocusLeave,
onKeyPressed,
onKeyReleased,
onKeyModifier,
onLegacy,
onButtonPressed,
onButtonReleased,
onHoverEnter,
onHoverLeave,
onMotion,
onScroll,
onScrollDecelerate,
...props
}: EventController<Gtk.Widget> & T) {
if (onFocusEnter || onFocusLeave) {
const focus = new Gtk.EventControllerFocus
widget.add_controller(focus)
if (onFocusEnter)
focus.connect("enter", () => onFocusEnter(widget))
if (onFocusLeave)
focus.connect("leave", () => onFocusLeave(widget))
}
if (onKeyPressed || onKeyReleased || onKeyModifier) {
const key = new Gtk.EventControllerKey
widget.add_controller(key)
if (onKeyPressed)
key.connect("key-pressed", (_, val, code, state) => onKeyPressed(widget, val, code, state))
if (onKeyReleased)
key.connect("key-released", (_, val, code, state) => onKeyReleased(widget, val, code, state))
if (onKeyModifier)
key.connect("modifiers", (_, state) => onKeyModifier(widget, state))
}
if (onLegacy || onButtonPressed || onButtonReleased) {
const legacy = new Gtk.EventControllerLegacy
widget.add_controller(legacy)
legacy.connect("event", (_, event) => {
if (event.get_event_type() === Gdk.EventType.BUTTON_PRESS) {
onButtonPressed?.(widget, event as Gdk.ButtonEvent)
}
if (event.get_event_type() === Gdk.EventType.BUTTON_RELEASE) {
onButtonReleased?.(widget, event as Gdk.ButtonEvent)
}
onLegacy?.(widget, event)
})
}
if (onMotion || onHoverEnter || onHoverLeave) {
const hover = new Gtk.EventControllerMotion
widget.add_controller(hover)
if (onHoverEnter)
hover.connect("enter", (_, x, y) => onHoverEnter(widget, x, y))
if (onHoverLeave)
hover.connect("leave", () => onHoverLeave(widget))
if (onMotion)
hover.connect("motion", (_, x, y) => onMotion(widget, x, y))
}
if (onScroll || onScrollDecelerate) {
const scroll = new Gtk.EventControllerScroll
scroll.flags = Gtk.EventControllerScrollFlags.BOTH_AXES | Gtk.EventControllerScrollFlags.KINETIC
widget.add_controller(scroll)
if (onScroll)
scroll.connect("scroll", (_, x, y) => onScroll(widget, x, y))
if (onScrollDecelerate)
scroll.connect("decelerate", (_, x, y) => onScrollDecelerate(widget, x, y))
}
return props
}
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