feelfreetofee · September 10, 2024 15:06 · Sep 10, 2024
diff --git a/index.js b/index.js
@@ -0,0 +1,81 @@
+import {JSCallback, CString} from 'bun:ffi'
+import {encodeCString, default as lib} from './lib'
+export class Webview {
+	static #instances = []
+	static unload() {
+		for (const instance of this.#instances)
+			instance.destroy()
+		lib.close()
+	}
+	#handle
+	#callbacks = {}
+	constructor(debug = false, window) {
+		this.#handle = lib.symbols.webview_create(Number(this.debug = debug), window)
+	}
+	get handle() {
+		return handle
+	}
+	get window() {
+		return lib.symbols.webview_get_window(this.#handle)
+	}
+	set title(title) {
+		lib.symbols.webview_set_title(this.#handle, encodeCString(title))
+	}
+	set size({width, height, hint}) {
+		lib.symbols.webview_set_size(this.#handle, width, height, hint)
+	}
+	set html(html) {
+		lib.symbols.webview_set_html(this.#handle, encodeCString(html))
+	}
+	navigate(url) {
+		lib.symbols.webview_navigate(this.#handle, encodeCString(url))
+	}
+	init(source) {
+		lib.symbols.webview_init(this.#handle, encodeCString(source))
+	}
+	eval(source) {
+		lib.symbols.webview_eval(this.#handle, encodeCString(source))
+	}
+	run() {
+		lib.symbols.webview_run(this.#handle)
+		this.destroy()
+	}
+	return(id, status, result = null) {
+		lib.symbols.webview_return(this.#handle, encodeCString(id), status, encodeCString(result))
+	}
+	dispatch(name, ...arg) {
+		lib.symbols.webview_dispatch(this.#handle, this.#callbacks[name], encodeCString(JSON.stringify(arg)))
+	}
+	destroy() {
+		for (const callback of Object.keys(this.#callbacks))
+			this.unbind(callback)
+		lib.symbols.webview_terminate(this.#handle)
+		lib.symbols.webview_destroy(this.#handle)
+		this.#handle = null
+	}
+	bindRaw(name, callback, arg) {        
+		lib.symbols.webview_bind(this.#handle, encodeCString(name), (
+			this.#callbacks[name] = new JSCallback((id, req, arg) => callback(new CString(id), new CString(req), arg), {
+				args: ['cstring', 'cstring', 'ptr']
+			})
+		).ptr, arg)
+	}
+	bind(name, callback) {
+		this.bindRaw(name, (id, req) => {
+            try {
+				const result = callback(...JSON.parse(req))
+				if (result instanceof Promise)
+					result.then(r => this.return(id, 0, JSON.stringify(r)))
+				else
+					this.return(id, 0, JSON.stringify(result))
+			} catch(error) {
+				this.return(id, 1, error)
+			}
+		})
+	}
+	unbind(name) {
+		lib.symbols.webview_unbind(this.#handle, encodeCString(name))
+		this.#callbacks[name]?.close()
+		delete this.#callbacks[name]
+	}
+}
diff --git a/lib.js b/lib.js
@@ -0,0 +1,55 @@
+import {dlopen, suffix, ptr} from 'bun:ffi'
+export const encodeCString = str => ptr(Buffer.from(str + '\0', 'utf8'))
+export default dlopen(`${import.meta.dir}/lib/libwebview.${suffix}`, {
+	webview_create: {
+		args: ['i32', 'ptr'],
+		returns: 'ptr'
+	},
+	webview_destroy: {
+		args: ['ptr']
+	},
+	webview_run: {
+		args: ['ptr']
+	},
+	webview_terminate: {
+		args: ['ptr']
+	},
+	webview_dispatch: {
+		args: ['ptr', 'function', 'ptr']
+	},
+	webview_get_window: {
+		args: ['ptr'],
+		returns: 'ptr'
+	},
+	webview_get_native_handle: {
+		args: ['ptr', 'i32'],
+		returns: 'ptr'
+	},
+	webview_set_title: {
+		args: ['ptr', 'cstring']
+	},
+	webview_set_size: {
+		args: ['ptr', 'i32', 'i32', 'i32']
+	},
+	webview_navigate: {
+		args: ['ptr', 'cstring']
+	},
+	webview_set_html: {
+		args: ['ptr', 'cstring']
+	},
+	webview_init: {
+		args: ['ptr', 'cstring']
+	},
+	webview_eval: {
+		args: ['ptr', 'cstring']
+	},
+	webview_bind: {
+		args: ['ptr', 'cstring', 'function', 'ptr']
+	},
+	webview_unbind: {
+		args: ['ptr', 'cstring']
+	},
+	webview_return: {
+		args: ['ptr', 'cstring', 'i32', 'cstring']
+	}
+})
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