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//! Raw FFI bindings to [webview].
//!
//! To use a custom version of webview, define an environment variable `WEBVIEW_DIR` with the path
//! to its source directory.
//!
//! [webview]: https://github.com/zserge/webview

#[cfg(all(target_family = "unix", not(target_os = "macos")))]
mod gtk;

use std::os::raw::*;

pub enum CWebView {} // opaque type, only used in ffi pointers

type ErasedExternalInvokeFn = extern "C" fn(webview: *mut CWebView, arg: *const c_char);
type ErasedDispatchFn = extern "C" fn(webview: *mut CWebView, arg: *mut c_void);

extern "C" {
    pub fn webview_free(this: *mut CWebView);
    pub fn webview_new(
        title: *const c_char,
        url: *const c_char,
        width: c_int,
        height: c_int,
        resizable: c_int,
        debug: c_int,
        frameless: c_int,
        visible: c_int,
        min_width: c_int,
        min_height: c_int,
        external_invoke_cb: Option<ErasedExternalInvokeFn>,
        userdata: *mut c_void,
    ) -> *mut CWebView;
    pub fn webview_loop(this: *mut CWebView, blocking: c_int) -> c_int;
    pub fn webview_exit(this: *mut CWebView);
    pub fn webview_get_user_data(this: *mut CWebView) -> *mut c_void;
    pub fn webview_get_window_handle(this: *mut CWebView) -> *mut c_void;
    pub fn webview_dispatch(this: *mut CWebView, f: Option<ErasedDispatchFn>, arg: *mut c_void);
    pub fn webview_eval(this: *mut CWebView, js: *const c_char) -> c_int;
    pub fn webview_set_title(this: *mut CWebView, title: *const c_char);
    pub fn webview_set_fullscreen(this: *mut CWebView, fullscreen: c_int);
    pub fn webview_set_maximized(this: *mut CWebView, maximize: c_int);
    pub fn webview_set_minimized(this: *mut CWebView, minimize: c_int);
    pub fn webview_set_visible(this: *mut CWebView, visible: c_int);
    pub fn webview_set_color(this: *mut CWebView, red: u8, green: u8, blue: u8, alpha: u8);
    pub fn webview_set_zoom_level(this: *mut CWebView, percentage: c_double);
    pub fn webview_set_html(this: *mut CWebView, html: *const c_char);
}