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use x11::xlib;
use x11::xlib::{
Window,
XWindowAttributes,
XGetWindowAttributes,
XDefaultScreenOfDisplay,
XMoveWindow,
XSetInputFocus,
XSetWindowBorder,
IsViewable, RevertToParent, CurrentTime,
};
use std::ptr;
use std::mem::uninitialized;
use std::cmp::{max};
use safe_x11::{screen_ratio,get_color};
/// Representation of [`xlib::Window`](../../x11/xlib/type.Window.html)
pub struct XWindow {
display: *mut xlib::Display,
/// xlib::Window that wraps this struct.
pub inner: Window,
}
fn fixed_with_ratio(x: i32, ratio: f32) -> i32 {
let fx = x as f32;
let fixed = fx * ratio;
fixed as i32
}
impl XWindow {
/// Generate a reference to the window in certain display. This will return
/// `None` if the window is the root window.
pub fn new(d: *mut xlib::Display, w: Window) -> Option<XWindow> {
if w != 0 {
Some(XWindow {
display: d,
inner: w,
})
} else {
None
}
}
/// Set the border width To the window.
pub fn set_border_width(&self, size: u32) {
unsafe { xlib::XSetWindowBorderWidth(self.display, self.inner, size) };
}
pub fn set_border_color<T: Into<Vec<u8>>>(&self, color: T) {
let c = get_color(self.display, color);
unsafe { XSetWindowBorder(self.display, self.inner, c); }
}
/// Raises a window.
pub fn raise(&self) {
unsafe { xlib::XRaiseWindow(self.display, self.inner); }
}
/// Register input events on some [`xlib::Window`](../../x11/xlib/type.Window.html)
///
/// # Example
///
/// if we want to handle when a pointer enter into a window rectangle, we
/// should do something like:
///
/// ```
/// use x11::xlib;
///
/// let display = open_display("").unwrap();
/// // Raw window
/// let window = 0xc00022;
///
/// window.select_input(xlib::EnterWindowMask);
/// ```
pub fn select_input(&self, mask: i64) {
unsafe { xlib::XSelectInput(self.display, self.inner, mask); }
}
/// Returns the window attributes from certain window.
pub fn attributes(&self) -> XWindowAttributes {
unsafe {
let attrptr: *mut XWindowAttributes = uninitialized();
XGetWindowAttributes(self.display, self.inner, attrptr);
ptr::read(attrptr)
}
}
/// Moves the window given an offset from where it is.
pub fn move_offset(&self, xoffset: i32, yoffset: i32) {
unsafe {
let mut attributes: XWindowAttributes = uninitialized();
XGetWindowAttributes(self.display, self.inner, &mut attributes);
println!("Moving window({:x}), {} + {} = {}, {} + {} = {}",
self.inner as u64,
attributes.x, xoffset, attributes.x + xoffset,
attributes.y, yoffset, attributes.y + yoffset);
XMoveWindow(self.display, self.inner,
attributes.x + xoffset,
attributes.y + yoffset);
}
}
/// Moves the window to a particular coord in the screen.
pub fn move_to(&self, x: i32, y: i32) -> Result<(), &str> {
let screen = unsafe {
let s = XDefaultScreenOfDisplay(self.display);
ptr::read(s)
};
if 0 > x && x <= screen.width || 0 > y && y <= screen.height {
Err("Cannot move the window outside the screen!")
} else {
unsafe { XMoveWindow(self.display, self.inner, x, y) };
Ok(())
}
}
/// Resizes the window a fixed amount within the height and width.
pub fn resize(&self, w: i32, h: i32) {
let ratio = screen_ratio(self.display);
let attrs = self.attributes();
unsafe {
let ww: u32 = max(1, (attrs.width + fixed_with_ratio(w, ratio)) as u32);
let wh: u32 = max(1, (attrs.height + fixed_with_ratio(h, ratio)) as u32);
xlib::XResizeWindow(self.display, self.inner,
ww, wh);
}
}
/// Raise the focus of the window.
pub fn focus(&self) {
let attrs = self.attributes();
if attrs.map_state == IsViewable {
unsafe {
XSetInputFocus(self.display, self.inner,
RevertToParent, CurrentTime)
};
}
}
}
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