Golang webkit_web_view_run_javascript Examples

Example #1

File: webview.go Project: visionect/go-webkit2

// RunJavaScript runs script asynchronously in the context of the current page
// in the WebView. Upon completion, resultCallback will be called with the
// result of evaluating the script, or with an error encountered during
// execution. To get the stack trace and other error logs, use the
// ::console-message signal.
//
// See also: webkit_web_view_run_javascript at
// http://webkitgtk.org/reference/webkit2gtk/stable/WebKitWebView.html#webkit-web-view-run-javascript
func (v *WebView) RunJavaScript(script string, resultCallback func(result *gojs.Value, err error)) {
	var cCallback C.GAsyncReadyCallback
	var userData C.gpointer
	var err error
	if resultCallback != nil {
		callback := func(result *C.GAsyncResult) {
			var jserr *C.GError
			jsResult := C.webkit_web_view_run_javascript_finish(v.webView, result, &jserr)
			if jsResult == nil {
				defer C.g_error_free(jserr)
				msg := C.GoString((*C.char)(jserr.message))
				resultCallback(nil, errors.New(msg))
				return
			}
			ctxRaw := gojs.RawGlobalContext(unsafe.Pointer(C.webkit_javascript_result_get_global_context(jsResult)))
			jsValRaw := gojs.RawValue(unsafe.Pointer(C.webkit_javascript_result_get_value(jsResult)))
			ctx := (*gojs.Context)(gojs.NewGlobalContextFrom(ctxRaw))
			jsVal := ctx.NewValueFrom(jsValRaw)
			resultCallback(jsVal, nil)
		}
		cCallback, userData, err = newGAsyncReadyCallback(callback)
		if err != nil {
			panic(err)
		}
	}
	cScript := C.CString(script)
	defer C.free(unsafe.Pointer(cScript))
	C.webkit_web_view_run_javascript(v.webView, (*C.gchar)(cScript), nil, cCallback, userData)
}

Example #2

File: webview.go Project: auroralaboratories/go-webkit2

// RunJavaScript runs script asynchronously in the context of the current page
// in the WebView. Upon completion, resultCallback will be called with the
// result of evaluating the script, or with an error encountered during
// execution. To get the stack trace and other error logs, use the
// ::console-message signal.
//
// See also: webkit_web_view_run_javascript at
// http://webkitgtk.org/reference/webkit2gtk/stable/WebKitWebView.html#webkit-web-view-run-javascript
func (v *WebView) RunJavaScript(script string, resultCallback func(result *gojs.Value, err error)) {
	var callbackIdPtr unsafe.Pointer

	if resultCallback != nil {
		callbackId := cgoregister(``, &RunJavaScriptResponse{
			CWebView:   v.webView,
			Reply:      resultCallback,
			Autoremove: true,
		})

		callbackIdPtr = unsafe.Pointer(C.CString(callbackId))
	}

	C.webkit_web_view_run_javascript(v.webView,
		(*C.gchar)(C.CString(script)),
		nil,
		(C.GAsyncReadyCallback)(C.webkit2_gasync_callback),
		callbackIdPtr)
}