If anyone is interested in using a webview with Nim below is a wrapper I made
for the cross-platform [webview](https://github.com/webview/webview) library.
You can find compiled binaries
[here](https://github.com/PierceNg/fpwebview/tree/master/dll/x86_64).
I'm a Nim newbie so this code needs reviewing but it seems to work OK on my MX
Linux PC 😉
const WebView_NoDevTools* = 0
const WebView_DevTools* = 1
const WebView_Hint_None* = 0
const WebView_Hint_Min* = 1
const WebView_Hint_Max* = 2
const WebView_Hint_Fixed* = 3
const WebView_Return_Ok* = 0
const WebView_Return_Error* = 1
when defined windows:
const libwebview = "./webview.dll"
proc MoveWindow(nHandle, x, y, w, h: clong, repaint: cshort) {.stdcall,
dynlib: "user32", importc: "MoveWindow".}
proc ShowWindow(nHandle, mode: clong) {.stdcall, dynlib: "user32",
importc: "ShowWindow".}
elif defined linux:
const libwebview = "./libwebview.so"
proc gtk_window_move(nHandle, x, y: clong) {.cdecl, dynlib:
"libgtk-3.so", importc.}
proc gtk_window_resize(nHandle, w, h: clong) {.cdecl, dynlib:
"libgtk-3.so", importc.}
proc gtk_window_maximize(nHandle: clong) {.cdecl, dynlib:
"libgtk-3.so", importc.}
else:
const libwebview = "./libwebview.dylib"
proc webview_create*(debugOn, windowid: clong): pointer {.cdecl, dynlib:
libwebview, importc.}
proc webview_get_window*(webview: pointer): clong {.cdecl, dynlib:
libwebview, importc.}
proc webview_destroy*(webview: pointer) {.cdecl, dynlib: libwebview,
importc.}
proc webview_run*(webview: pointer) {.cdecl, dynlib: libwebview, importc.}
proc webview_terminate*(webview: pointer) {.cdecl, dynlib: libwebview,
importc.}
proc webview_dispatch*(webview, fn, args: pointer) {.cdecl, dynlib:
libwebview, importc.}
proc webview_set_html*(webview: pointer, html: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_set_title*(webview: pointer, title: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_set_size*(webview: pointer, width, height, hints: clong)
{.cdecl, dynlib: libwebview, importc.}
proc webview_navigate*(webview: pointer, url: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_init*(webview: pointer, js: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_eval*(webview: pointer, js: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_bind*(webview: pointer, name: cstring, fn, args: pointer)
{.cdecl, dynlib: libwebview, importc.}
proc webview_unbind*(webview: pointer, name: cstring) {.cdecl, dynlib:
libwebview, importc.}
proc webview_return*(webview: pointer, seqno: cstring, status: clong, res:
cstring) {.cdecl, dynlib: libwebview, importc.}
proc webview_maximize*(webview: pointer) =
var hndl = webview_get_window(webview)
when defined windows:
ShowWindow(hndl, 3)
elif defined linux:
gtk_window_maximize(hndl)
else:
# TODO: Mac OS, so for now ...
webview_set_size(webview, w, h, WebView_Hint_None)
proc webview_move_size*(webview: pointer, x, y, w, h: int) =
var hndl = webview_get_window(webview)
when defined windows:
MoveWindow(hndl, w, y, w, h, 1)
elif defined linux:
gtk_window_move(hndl, x, y)
gtk_window_resize(hndl, w, h)
else:
# ** TODO **, so for now ...
webview_set_size(webview, w, h, WebView_Hint_None)
when isMainModule:
var html = """
<head><body>
<button id='btn-test' >Click Me</button>
<script>
function test(evt) {
var someData = { 'param1': 'Hello from JS!' };
var s = window.rpc( evt.target.id, evt.type, someData )
.then(s => {
alert(s.result);
})
}
document.getElementById('btn-test').addEventListener('click', test);
</script>
</head></body>
"""
var w {.global.} = webview_create(WebView_DevTools, 0)
proc js_rpc(seqid, req: cstring, args: clong): void =
echo(req)
webview_return(w, seqid, 0, "{ 'result': 'Hello from Nim!' }")
webview_bind(w, "rpc", js_rpc, nil)
# webview_move_size(w, 20, 20, 1000, 500)
webview_maximize(w)
webview_set_title(w, "Nim WebView Example")
webview_set_html(w, html)
# webview_navigate(w, "https://nim-lang.org";)
webview_run(w)
webview_destroy(w)
Run
