<commit_before>use {Event, WindowBuilder, KeyModifiers};
use libc;
use std::{mem, ptr};
use std::cell::Cell;
use std::sync::atomic::AtomicBool;
use super::ffi;
use sync::one::{Once, ONCE_INIT};

pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};

mod events;
mod monitor;

static THREAD_INIT: Once = ONCE_INIT;

fn ensure_thread_init() {
    THREAD_INIT.doit(|| {
        unsafe {
            ffi::XInitThreads();
        }
    });
}

pub struct Window {
    display: *mut ffi::Display,
    window: ffi::Window,
    im: ffi::XIM,
    ic: ffi::XIC,
    context: ffi::GLXContext,
    is_closed: AtomicBool,
    wm_delete_window: ffi::Atom,
    xf86_desk_mode: *mut ffi::XF86VidModeModeInfo,
    screen_id: libc::c_int,
    is_fullscreen: bool,
    current_modifiers: Cell<KeyModifiers>,
}

impl Window {
    pub fn new(builder: WindowBuilder) -> Result<Window, String> {
        ensure_thread_init();
        let dimensions = builder.dimensions.unwrap_or((800, 600));

        // calling XOpenDisplay
        let display = unsafe {
            let display = ffi::XOpenDisplay(ptr::null());
            if display.is_null() {
                return Err(format!("XOpenDisplay failed"));
            }
            display
        };

        let screen_id = match builder.monitor {
            Some(MonitorID(monitor)) => monitor as i32,
            None => unsafe { ffi::XDefaultScreen(display) },
        };

        // getting the FBConfig
        let fb_config = unsafe {
            const VISUAL_ATTRIBUTES: [libc::c_int, ..23] = [
                ffi::GLX_X_RENDERABLE,  1,
                ffi::GLX_DRAWABLE_TYPE, ffi::GLX_WINDOW_BIT,
                ffi::GLX_RENDER_TYPE,   ffi::GLX_RGBA_BIT,
                ffi::GLX_X_VISUAL_TYPE, ffi::GLX_TRUE_COLOR,
                ffi::GLX_RED_SIZE,      8,
                ffi::GLX_GREEN_SIZE,    8,
                ffi::GLX_BLUE_SIZE,     8,
                ffi::GLX_ALPHA_SIZE,    8,
                ffi::GLX_DEPTH_SIZE,    24,
                ffi::GLX_STENCIL_SIZE,  8,
                ffi::GLX_DOUBLEBUFFER,  1,
                0
            ];

            let mut num_fb: libc::c_int = mem::uninitialized();

            let fb = ffi::glx::ChooseFBConfig(display, ffi::XDefaultScreen(display),
                VISUAL_ATTRIBUTES.as_ptr(), &mut num_fb);
            if fb.is_null() {
                return Err(format!("glx::ChooseFBConfig failed"));
            }
            let preferred_fb = *fb;     // TODO: choose more wisely
            ffi::XFree(fb as *const libc::c_void);
            preferred_fb
        };

        let mut best_mode = -1;
        let modes = unsafe {
            let mut mode_num: libc::c_int = mem::uninitialized();
            let mut modes: *mut *mut ffi::XF86VidModeModeInfo = mem::uninitialized();
            if ffi::XF86VidModeGetAllModeLines(display, screen_id, &mut mode_num, &mut modes) == 0 {
                return Err(format!("Could not query the video modes"));
            }

            for i in range(0, mode_num) {
                let mode: ffi::XF86VidModeModeInfo = **modes.offset(i as int);
                if mode.hdisplay == dimensions.val0() as u16 && mode.vdisplay == dimensions.val1() as u16 {
                    best_mode = i;
                }
            };
            if best_mode == -1 && builder.monitor.is_some() {
                return Err(format!("Could not find a suitable graphics mode"));
            }

           modes
        };

        let xf86_desk_mode = unsafe {
            *modes.offset(0)
        };

        // getting the visual infos
        let mut visual_infos = unsafe {
            let vi = ffi::glx::GetVisualFromFBConfig(display, fb_config);
            if vi.is_null() {
                return Err(format!("glx::ChooseVisual failed"));
            }
            let vi_copy = *vi;
            ffi::XFree(vi as *const libc::c_void);
            vi_copy
        };

        // getting the root window
        let root = unsafe { ffi::XDefaultRootWindow(display) };

        // creating the color map
        let cmap = unsafe {
            let cmap = ffi::XCreateColormap(display, root,
                visual_infos.visual, ffi::AllocNone);
            // TODO: error checking?
            cmap
        };

        // creating
        let mut set_win_attr = {
            let mut swa: ffi::XSetWindowAttributes = unsafe { mem::zeroed() };
            swa.colormap = cmap;
            swa.event_mask = ffi::ExposureMask | ffi::ResizeRedirectMask |
                ffi::VisibilityChangeMask | ffi::KeyPressMask | ffi::PointerMotionMask |
                ffi::KeyReleaseMask | ffi::ButtonPressMask |
                ffi::ButtonReleaseMask | ffi::KeymapStateMask;
            swa.border_pixel = 0;
            swa.override_redirect = 0;
            swa
        };

        let mut window_attributes = ffi::CWBorderPixel | ffi::CWColormap | ffi:: CWEventMask;
        if builder.monitor.is_some() {
            window_attributes |= ffi::CWOverrideRedirect;
            unsafe {
                ffi::XF86VidModeSwitchToMode(display, screen_id, *modes.offset(best_mode as int));
                ffi::XF86VidModeSetViewPort(display, screen_id, 0, 0);
                set_win_attr.override_redirect = 1;
            }
        }

        // finally creating the window
        let window = unsafe {
            let win = ffi::XCreateWindow(display, root, 0, 0, dimensions.val0() as libc::c_uint,
                dimensions.val1() as libc::c_uint, 0, visual_infos.depth, ffi::InputOutput,
                visual_infos.visual, window_attributes,
                &mut set_win_attr);
            win
        };

        // creating window, step 2
        let wm_delete_window = unsafe {
            use std::c_str::ToCStr;

            ffi::XMapWindow(display, window);
            let mut wm_delete_window = ffi::XInternAtom(display,
                "WM_DELETE_WINDOW".to_c_str().as_ptr() as *const libc::c_char, 0);
            ffi::XSetWMProtocols(display, window, &mut wm_delete_window, 1);
            let c_title = builder.title.to_c_str();
            ffi::XStoreName(display, window, c_title.as_ptr());
            ffi::XFlush(display);

            wm_delete_window
        };

        // creating IM
        let im = unsafe {
            let im = ffi::XOpenIM(display, ptr::null(), ptr::null_mut(), ptr::null_mut());
            if im.is_null() {
                return Err(format!("XOpenIM failed"));
            }
            im
        };

        // creating input context
        let ic = unsafe {
            use std::c_str::ToCStr;

            let ic = ffi::XCreateIC(im, "inputStyle".to_c_str().as_ptr(),
                ffi::XIMPreeditNothing | ffi::XIMStatusNothing, "clientWindow".to_c_str().as_ptr(),
                window, ptr::null());
            if ic.is_null() {
                return Err(format!("XCreateIC failed"));
            }
            ffi::XSetICFocus(ic);
            ic
        };

        // Attempt to make keyboard input repeat detectable
        unsafe {
            let mut supported_ptr = false;
            ffi::XkbSetDetectableAutoRepeat(display, true, &mut supported_ptr);
            if !supported_ptr {
                return Err(format!("XkbSetDetectableAutoRepeat failed"));
            }
        }


        // creating GL context
        let context = unsafe {
            let mut attributes = Vec::new();

            if builder.gl_version.is_some() {
                let version = builder.gl_version.as_ref().unwrap();
                attributes.push(ffi::GLX_CONTEXT_MAJOR_VERSION);
                attributes.push(version.val0() as libc::c_int);
                attributes.push(ffi::GLX_CONTEXT_MINOR_VERSION);
                attributes.push(version.val1() as libc::c_int);<commit_msg>Fix a few more string memory issues.<commit_after>use {Event, WindowBuilder, KeyModifiers};
use libc;
use std::{mem, ptr};
use std::cell::Cell;
use std::sync::atomic::AtomicBool;
use super::ffi;
use sync::one::{Once, ONCE_INIT};

pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};

mod events;
mod monitor;

static THREAD_INIT: Once = ONCE_INIT;

fn ensure_thread_init() {
    THREAD_INIT.doit(|| {
        unsafe {
            ffi::XInitThreads();
        }
    });
}

pub struct Window {
    display: *mut ffi::Display,
    window: ffi::Window,
    im: ffi::XIM,
    ic: ffi::XIC,
    context: ffi::GLXContext,
    is_closed: AtomicBool,
    wm_delete_window: ffi::Atom,
    xf86_desk_mode: *mut ffi::XF86VidModeModeInfo,
    screen_id: libc::c_int,
    is_fullscreen: bool,
    current_modifiers: Cell<KeyModifiers>,
}

impl Window {
    pub fn new(builder: WindowBuilder) -> Result<Window, String> {
        ensure_thread_init();
        let dimensions = builder.dimensions.unwrap_or((800, 600));

        // calling XOpenDisplay
        let display = unsafe {
            let display = ffi::XOpenDisplay(ptr::null());
            if display.is_null() {
                return Err(format!("XOpenDisplay failed"));
            }
            display
        };

        let screen_id = match builder.monitor {
            Some(MonitorID(monitor)) => monitor as i32,
            None => unsafe { ffi::XDefaultScreen(display) },
        };

        // getting the FBConfig
        let fb_config = unsafe {
            const VISUAL_ATTRIBUTES: [libc::c_int, ..23] = [
                ffi::GLX_X_RENDERABLE,  1,
                ffi::GLX_DRAWABLE_TYPE, ffi::GLX_WINDOW_BIT,
                ffi::GLX_RENDER_TYPE,   ffi::GLX_RGBA_BIT,
                ffi::GLX_X_VISUAL_TYPE, ffi::GLX_TRUE_COLOR,
                ffi::GLX_RED_SIZE,      8,
                ffi::GLX_GREEN_SIZE,    8,
                ffi::GLX_BLUE_SIZE,     8,
                ffi::GLX_ALPHA_SIZE,    8,
                ffi::GLX_DEPTH_SIZE,    24,
                ffi::GLX_STENCIL_SIZE,  8,
                ffi::GLX_DOUBLEBUFFER,  1,
                0
            ];

            let mut num_fb: libc::c_int = mem::uninitialized();

            let fb = ffi::glx::ChooseFBConfig(display, ffi::XDefaultScreen(display),
                VISUAL_ATTRIBUTES.as_ptr(), &mut num_fb);
            if fb.is_null() {
                return Err(format!("glx::ChooseFBConfig failed"));
            }
            let preferred_fb = *fb;     // TODO: choose more wisely
            ffi::XFree(fb as *const libc::c_void);
            preferred_fb
        };

        let mut best_mode = -1;
        let modes = unsafe {
            let mut mode_num: libc::c_int = mem::uninitialized();
            let mut modes: *mut *mut ffi::XF86VidModeModeInfo = mem::uninitialized();
            if ffi::XF86VidModeGetAllModeLines(display, screen_id, &mut mode_num, &mut modes) == 0 {
                return Err(format!("Could not query the video modes"));
            }

            for i in range(0, mode_num) {
                let mode: ffi::XF86VidModeModeInfo = **modes.offset(i as int);
                if mode.hdisplay == dimensions.val0() as u16 && mode.vdisplay == dimensions.val1() as u16 {
                    best_mode = i;
                }
            };
            if best_mode == -1 && builder.monitor.is_some() {
                return Err(format!("Could not find a suitable graphics mode"));
            }

           modes
        };

        let xf86_desk_mode = unsafe {
            *modes.offset(0)
        };

        // getting the visual infos
        let mut visual_infos = unsafe {
            let vi = ffi::glx::GetVisualFromFBConfig(display, fb_config);
            if vi.is_null() {
                return Err(format!("glx::ChooseVisual failed"));
            }
            let vi_copy = *vi;
            ffi::XFree(vi as *const libc::c_void);
            vi_copy
        };

        // getting the root window
        let root = unsafe { ffi::XDefaultRootWindow(display) };

        // creating the color map
        let cmap = unsafe {
            let cmap = ffi::XCreateColormap(display, root,
                visual_infos.visual, ffi::AllocNone);
            // TODO: error checking?
            cmap
        };

        // creating
        let mut set_win_attr = {
            let mut swa: ffi::XSetWindowAttributes = unsafe { mem::zeroed() };
            swa.colormap = cmap;
            swa.event_mask = ffi::ExposureMask | ffi::ResizeRedirectMask |
                ffi::VisibilityChangeMask | ffi::KeyPressMask | ffi::PointerMotionMask |
                ffi::KeyReleaseMask | ffi::ButtonPressMask |
                ffi::ButtonReleaseMask | ffi::KeymapStateMask;
            swa.border_pixel = 0;
            swa.override_redirect = 0;
            swa
        };

        let mut window_attributes = ffi::CWBorderPixel | ffi::CWColormap | ffi:: CWEventMask;
        if builder.monitor.is_some() {
            window_attributes |= ffi::CWOverrideRedirect;
            unsafe {
                ffi::XF86VidModeSwitchToMode(display, screen_id, *modes.offset(best_mode as int));
                ffi::XF86VidModeSetViewPort(display, screen_id, 0, 0);
                set_win_attr.override_redirect = 1;
            }
        }

        // finally creating the window
        let window = unsafe {
            let win = ffi::XCreateWindow(display, root, 0, 0, dimensions.val0() as libc::c_uint,
                dimensions.val1() as libc::c_uint, 0, visual_infos.depth, ffi::InputOutput,
                visual_infos.visual, window_attributes,
                &mut set_win_attr);
            win
        };

        // creating window, step 2
        let wm_delete_window = unsafe {
            use std::c_str::ToCStr;

            let delete_window = "WM_DELETE_WINDOW".to_c_str();
            ffi::XMapWindow(display, window);
            let mut wm_delete_window = ffi::XInternAtom(display, delete_window.as_ptr(), 0);
            ffi::XSetWMProtocols(display, window, &mut wm_delete_window, 1);
            let c_title = builder.title.to_c_str();
            ffi::XStoreName(display, window, c_title.as_ptr());
            ffi::XFlush(display);

            wm_delete_window
        };

        // creating IM
        let im = unsafe {
            let im = ffi::XOpenIM(display, ptr::null(), ptr::null_mut(), ptr::null_mut());
            if im.is_null() {
                return Err(format!("XOpenIM failed"));
            }
            im
        };

        // creating input context
        let ic = unsafe {
            use std::c_str::ToCStr;

            let input_style = "inputStyle".to_c_str();
            let client_window = "clientWindow".to_c_str();
            let ic = ffi::XCreateIC(im, input_style.as_ptr(),
                ffi::XIMPreeditNothing | ffi::XIMStatusNothing, client_window.as_ptr(),
                window, ptr::null());
            if ic.is_null() {
                return Err(format!("XCreateIC failed"));
            }
            ffi::XSetICFocus(ic);
            ic
        };

        // Attempt to make keyboard input repeat detectable
        unsafe {
            let mut supported_ptr = false;
            ffi::XkbSetDetectableAutoRepeat(display, true, &mut supported_ptr);
            if !supported_ptr {
                return Err(format!("XkbSetDetectableAutoRepeat failed"));
            }
        }


        // creating GL context
        let context = unsafe {
            let mut attributes = Vec::new();

            if builder.gl_version.is_some() {
                let version = builder.gl_version.as_ref().unwrap();
                attributes.push(ffi::GLX_CONTEXT_MAJOR_VERSION);
                attributes.push(version.val0() as libc::c_int);
                attributes.push(ffi::GLX_CONTEXT_MINOR_VERSION);
                attributes.push(version.val1() as libc::c_int);
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