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use std::cell::Cell;
use std::env;
use std::ptr;
use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
use libc::{c_int, c_uint};
use ffi;
use glib::translate::*;
use glib;
use gdk;
thread_local! {
static IS_MAIN_THREAD: Cell<bool> = Cell::new(false)
}
static INITIALIZED: AtomicBool = ATOMIC_BOOL_INIT;
macro_rules! assert_initialized_main_thread {
() => (
if !::rt::is_initialized_main_thread() {
if ::rt::is_initialized() {
panic!("GTK may only be used from the main thread.");
}
else {
panic!("GTK has not been initialized. Call `gtk::init` first.");
}
}
)
}
macro_rules! skip_assert_initialized {
() => ()
}
#[allow(unused_macros)]
macro_rules! assert_not_initialized {
() => (
if ::rt::is_initialized() {
panic!("This function has to be called before `gtk::init`.");
}
)
}
macro_rules! callback_guard {
() => (
let _guard = ::glib::CallbackGuard::new();
if cfg!(debug_assertions) {
assert_initialized_main_thread!();
}
)
}
#[inline]
pub fn is_initialized() -> bool {
skip_assert_initialized!();
INITIALIZED.load(Ordering::Acquire)
}
#[inline]
pub fn is_initialized_main_thread() -> bool {
skip_assert_initialized!();
IS_MAIN_THREAD.with(|c| c.get())
}
pub unsafe fn set_initialized() {
skip_assert_initialized!();
if is_initialized_main_thread() {
return;
}
else if is_initialized() {
panic!("Attempted to initialize GTK from two different threads.");
}
gdk::set_initialized();
INITIALIZED.store(true, Ordering::Release);
IS_MAIN_THREAD.with(|c| c.set(true));
}
pub fn init() -> Result<(), glib::BoolError> {
skip_assert_initialized!();
if is_initialized_main_thread() {
return Ok(());
}
else if is_initialized() {
panic!("Attempted to initialize GTK from two different threads.");
}
unsafe {
if pre_init() && from_glib(ffi::gtk_init_check(ptr::null_mut(), ptr::null_mut())) {
set_initialized();
Ok(())
}
else {
Err(glib::BoolError("Failed to initialize GTK"))
}
}
}
fn pre_init() -> bool {
skip_assert_initialized!();
let gtk_debug = env::var_os("GTK_DEBUG")
.map_or(String::new(), |s| s.to_string_lossy().to_lowercase());
let words = gtk_debug.split(|c| {
match c {
':' | ';' | ',' | ' ' | '\t' => true,
_ => false,
}
}).collect::<Vec<_>>();
let has_misc = words.contains(&"all") ^ words.contains(&"misc");
unsafe {
let argv = ["", "--gtk-debug=misc"];
let mut argc = argv.len() as c_int;
let mut argv_stash = argv.to_glib_none();
let ret = from_glib(ffi::gtk_parse_args(&mut argc, &mut argv_stash.0));
let flags = ffi::gtk_get_debug_flags();
if flags == 0 {
panic!("libgtk-3 was configured with `--enable-debug=no`. \
See https://github.com/gtk-rs/gtk/issues/270 for details");
}
if !has_misc {
ffi::gtk_set_debug_flags(flags & !ffi::GTK_DEBUG_MISC.bits());
}
ret
}
}
pub fn main_quit() {
assert_initialized_main_thread!();
unsafe {
if ffi::gtk_main_level() > 0 {
ffi::gtk_main_quit();
}
else if cfg!(debug_assertions) {
panic!("Attempted to quit a GTK main loop when none is running.");
}
}
}
pub fn get_major_version() -> u32 {
skip_assert_initialized!();
unsafe {
ffi::gtk_get_major_version() as u32
}
}
pub fn get_minor_version() -> u32 {
skip_assert_initialized!();
unsafe {
ffi::gtk_get_minor_version() as u32
}
}
pub fn get_micro_version() -> u32 {
skip_assert_initialized!();
unsafe {
ffi::gtk_get_micro_version() as u32
}
}
pub fn get_binary_age() -> u32 {
skip_assert_initialized!();
unsafe {
ffi::gtk_get_binary_age() as u32
}
}
pub fn get_interface_age() -> u32 {
skip_assert_initialized!();
unsafe {
ffi::gtk_get_interface_age() as u32
}
}
pub fn check_version(required_major: u32, required_minor: u32, required_micro: u32) -> Option<String> {
skip_assert_initialized!();
unsafe {
from_glib_none(
ffi::gtk_check_version(required_major as c_uint, required_minor as c_uint, required_micro as c_uint))
}
}