use std::error;
use std::ffi::{CString, NulError};
use std::fmt;
use std::ptr;
use std::os::raw::{c_char,c_int};
use crate::video::Window;
use crate::get_error;
use crate::sys;
bitflags! {
pub struct MessageBoxFlag: u32 {
const ERROR =
sys::SDL_MessageBoxFlags::SDL_MESSAGEBOX_ERROR as u32;
const WARNING =
sys::SDL_MessageBoxFlags::SDL_MESSAGEBOX_WARNING as u32;
const INFORMATION =
sys::SDL_MessageBoxFlags::SDL_MESSAGEBOX_INFORMATION as u32;
}
}
bitflags! {
pub struct MessageBoxButtonFlag: u32 {
const ESCAPEKEY_DEFAULT =
sys::SDL_MessageBoxButtonFlags::SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT as u32;
const RETURNKEY_DEFAULT =
sys::SDL_MessageBoxButtonFlags::SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT as u32;
const NOTHING = 0;
}
}
#[derive(Debug)]
pub struct MessageBoxColorScheme {
pub background:(u8,u8,u8),
pub text:(u8,u8,u8),
pub button_border:(u8,u8,u8),
pub button_background:(u8,u8,u8),
pub button_selected:(u8,u8,u8)
}
impl Into<sys::SDL_MessageBoxColorScheme> for MessageBoxColorScheme {
fn into(self) -> sys::SDL_MessageBoxColorScheme {
sys::SDL_MessageBoxColorScheme { colors: self.into() }
}
}
impl From<sys::SDL_MessageBoxColorScheme> for MessageBoxColorScheme {
fn from(prim: sys::SDL_MessageBoxColorScheme) -> MessageBoxColorScheme {
prim.colors.into()
}
}
#[derive(Debug)]
pub struct ButtonData<'a> {
pub flags:MessageBoxButtonFlag,
pub button_id:i32,
pub text:&'a str
}
#[derive(Debug)]
pub enum ClickedButton<'a> {
CloseButton,
CustomButton(&'a ButtonData<'a>)
}
impl From<MessageBoxColorScheme> for [sys::SDL_MessageBoxColor ; 5] {
fn from(scheme:MessageBoxColorScheme) -> [sys::SDL_MessageBoxColor ; 5] {
fn to_message_box_color(t:(u8,u8,u8)) -> sys::SDL_MessageBoxColor {
sys::SDL_MessageBoxColor {
r:t.0,
g:t.1,
b:t.2
}
};
[to_message_box_color(scheme.background),
to_message_box_color(scheme.text),
to_message_box_color(scheme.button_border),
to_message_box_color(scheme.button_background),
to_message_box_color(scheme.button_selected)]
}
}
impl Into<MessageBoxColorScheme> for [sys::SDL_MessageBoxColor ; 5] {
fn into(self) -> MessageBoxColorScheme {
fn from_message_box_color(prim_color: sys::SDL_MessageBoxColor) -> (u8, u8, u8) {
(prim_color.r, prim_color.g, prim_color.b)
};
MessageBoxColorScheme{
background: from_message_box_color(self[0]),
text: from_message_box_color(self[1]),
button_border: from_message_box_color(self[2]),
button_background: from_message_box_color(self[3]),
button_selected: from_message_box_color(self[4]),
}
}
}
#[derive(Debug)]
pub enum ShowMessageError {
InvalidTitle(NulError),
InvalidMessage(NulError),
InvalidButton(NulError,i32),
SdlError(String),
}
impl fmt::Display for ShowMessageError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::ShowMessageError::*;
match *self {
InvalidTitle(ref e) => write!(f, "Invalid title: {}", e),
InvalidMessage(ref e) => write!(f, "Invalid message: {}", e),
InvalidButton(ref e, value) => write!(f,
"Invalid button ({}): {}", value, e),
SdlError(ref e) => write!(f, "SDL error: {}", e)
}
}
}
impl error::Error for ShowMessageError {
fn description(&self) -> &str {
use self::ShowMessageError::*;
match *self {
InvalidTitle(_) => "invalid title",
InvalidMessage(_) => "invalid message",
InvalidButton(..) => "invalid button",
SdlError(ref e) => e
}
}
}
pub fn show_simple_message_box<'a, W>(flags: MessageBoxFlag, title: &str,
message: &str, window: W)
-> Result<(), ShowMessageError>
where W: Into<Option<&'a Window>>
{
use self::ShowMessageError::*;
let result = unsafe {
let title = match CString::new(title) {
Ok(s) => s,
Err(err) => return Err(InvalidTitle(err)),
};
let message = match CString::new(message) {
Ok(s) => s,
Err(err) => return Err(InvalidMessage(err)),
};
sys::SDL_ShowSimpleMessageBox(
flags.bits(),
title.as_ptr() as *const c_char,
message.as_ptr() as *const c_char,
window.into().map_or(ptr::null_mut(), |win| win.raw())
)
} == 0;
if result {
Ok(())
} else {
Err(SdlError(get_error()))
}
}
pub fn show_message_box<'a, 'b, W, M>(flags:MessageBoxFlag, buttons:&'a [ButtonData], title:&str,
message:&str, window: W, scheme: M)
-> Result<ClickedButton<'a>,ShowMessageError>
where W: Into<Option<&'b Window>>,
M: Into<Option<MessageBoxColorScheme>>,
{
let window = window.into();
let scheme = scheme.into();
use self::ShowMessageError::*;
let mut button_id : c_int = 0;
let title = match CString::new(title) {
Ok(s) => s,
Err(err) => return Err(InvalidTitle(err)),
};
let message = match CString::new(message) {
Ok(s) => s,
Err(err) => return Err(InvalidMessage(err)),
};
let button_texts : Result<Vec<_>,(_,i32)> = buttons.iter().map(|b|{
CString::new(b.text).map_err(|e|(e,b.button_id))
}).collect();
let button_texts = match button_texts {
Ok(b) => b,
Err(e) => return Err(InvalidButton(e.0,e.1))
};
let raw_buttons : Vec<sys::SDL_MessageBoxButtonData> =
buttons.iter().zip(button_texts.iter()).map(|(b,b_text)|{
sys::SDL_MessageBoxButtonData {
flags:b.flags.bits(),
buttonid:b.button_id as c_int,
text:b_text.as_ptr()
}
}).collect();
let result = unsafe {
let msg_box_data = sys::SDL_MessageBoxData {
flags:flags.bits(),
window:window.map_or(ptr::null_mut(), |win| win.raw()),
title: title.as_ptr() as *const c_char,
message: message.as_ptr() as *const c_char,
numbuttons: raw_buttons.len() as c_int,
buttons: raw_buttons.as_ptr(),
colorScheme: if let Some(scheme) = scheme {
&sys::SDL_MessageBoxColorScheme {
colors:From::from(scheme)
} as *const _
} else {
ptr::null()
}
};
sys::SDL_ShowMessageBox(
&msg_box_data as *const _,
&mut button_id as &mut _
)
} == 0;
if result {
match button_id {
-1 => Ok(ClickedButton::CloseButton),
id => {
let button = buttons.iter().find(|b| b.button_id == id);
Ok(ClickedButton::CustomButton(button.unwrap()))
}
}
} else {
Err(SdlError(get_error()))
}
}