mirror of
https://github.com/italicsjenga/winit-sonoma-fix.git
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x11: More robust geometry calculations (#438)
Tested on the following window managers: * Xfwm4 4.12.4 * Mutter 3.26.2 * Muffin 3.6.0 * Budgie 10.4 * Marco 1.20.0 * Compiz 0.9.13.1 * KWin 5.12.3 * Enlightenment 0.22.2 * FVWM 2.6.7 * Awesome 4.2 * i3 4.15 * xmonad 0.13 * dwm 6.1 * Openbox 3.6.1 * Fluxbox 1.3.7 * Blackbox 0.70.1 * IceWM 1.3.8 * IceWM 1.4.2
This commit is contained in:
Francesca Frangipane
GitHub
parent
9d036a6faa
commit
4005bf11e4
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@ -1,5 +1,7 @@
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# Unreleased
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- Overhauled X11 window geometry calculations. `get_position` and `set_position` are more universally accurate across different window managers, and `get_outer_size` actually works now.
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# Version 0.12.0 (2018-04-06)
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- Added subclass to macos windows so they can be made resizable even with no decorations.
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@ -98,6 +98,16 @@ pub enum GetPropertyError {
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NothingAllocated,
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}
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impl GetPropertyError {
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pub fn is_actual_property_type(&self, t: ffi::Atom) -> bool {
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if let GetPropertyError::TypeMismatch(actual_type) = *self {
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actual_type == t
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} else {
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false
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}
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}
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}
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pub unsafe fn get_property<T>(
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xconn: &Arc<XConnection>,
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window: c_ulong,
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@ -299,6 +309,62 @@ pub unsafe fn lookup_utf8(
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str::from_utf8(&buffer[..count as usize]).unwrap_or("").to_string()
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}
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#[derive(Debug)]
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pub struct FrameExtents {
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pub left: c_ulong,
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pub right: c_ulong,
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pub top: c_ulong,
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pub bottom: c_ulong,
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}
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impl FrameExtents {
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pub fn new(left: c_ulong, right: c_ulong, top: c_ulong, bottom: c_ulong) -> Self {
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FrameExtents { left, right, top, bottom }
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}
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pub fn from_border(border: c_ulong) -> Self {
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Self::new(border, border, border, border)
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}
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}
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#[derive(Debug)]
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pub struct WindowGeometry {
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pub x: c_int,
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pub y: c_int,
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pub width: c_uint,
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pub height: c_uint,
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pub frame: FrameExtents,
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}
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impl WindowGeometry {
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pub fn get_position(&self) -> (i32, i32) {
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(self.x as _, self.y as _)
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}
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pub fn get_inner_position(&self) -> (i32, i32) {
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(
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self.x.saturating_add(self.frame.left as c_int) as _,
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self.y.saturating_add(self.frame.top as c_int) as _,
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)
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}
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pub fn get_inner_size(&self) -> (u32, u32) {
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(self.width as _, self.height as _)
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}
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pub fn get_outer_size(&self) -> (u32, u32) {
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(
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self.width.saturating_add(
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self.frame.left.saturating_add(self.frame.right) as c_uint
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) as _,
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self.height.saturating_add(
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self.frame.top.saturating_add(self.frame.bottom) as c_uint
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) as _,
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)
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}
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}
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// Important: all XIM calls need to happen from the same thread!
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pub struct Ime {
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xconn: Arc<XConnection>,
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@ -5,7 +5,7 @@ use libc;
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use std::borrow::Borrow;
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use std::{mem, cmp, ptr};
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use std::sync::{Arc, Mutex};
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use std::os::raw::{c_int, c_long, c_uchar, c_ulong, c_void};
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use std::os::raw::{c_int, c_long, c_uchar, c_uint, c_ulong, c_void};
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use std::thread;
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use std::time::Duration;
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@ -99,6 +99,140 @@ pub struct Window2 {
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pub x: Arc<XWindow>,
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cursor: Mutex<MouseCursor>,
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cursor_state: Mutex<CursorState>,
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supported_hints: Vec<ffi::Atom>,
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wm_name: Option<String>,
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}
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fn get_supported_hints(xwin: &Arc<XWindow>) -> Vec<ffi::Atom> {
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let supported_atom = unsafe { util::get_atom(&xwin.display, b"_NET_SUPPORTED\0") }
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.expect("Failed to call XInternAtom (_NET_SUPPORTED)");
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unsafe {
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util::get_property(
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&xwin.display,
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xwin.root,
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supported_atom,
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ffi::XA_ATOM,
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)
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}.unwrap_or_else(|_| Vec::with_capacity(0))
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}
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fn get_wm_name(xwin: &Arc<XWindow>, _supported_hints: &[ffi::Atom]) -> Option<String> {
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let check_atom = unsafe { util::get_atom(&xwin.display, b"_NET_SUPPORTING_WM_CHECK\0") }
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.expect("Failed to call XInternAtom (_NET_SUPPORTING_WM_CHECK)");
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let wm_name_atom = unsafe { util::get_atom(&xwin.display, b"_NET_WM_NAME\0") }
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.expect("Failed to call XInternAtom (_NET_WM_NAME)");
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// Mutter/Muffin/Budgie doesn't have _NET_SUPPORTING_WM_CHECK in its _NET_SUPPORTED, despite
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// it working and being supported. This has been reported upstream, but due to the
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// inavailability of time machines, we'll just try to get _NET_SUPPORTING_WM_CHECK
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// regardless of whether or not the WM claims to support it.
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//
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// Blackbox 0.70 also incorrectly reports not supporting this, though that appears to be fixed
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// in 0.72.
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/*if !supported_hints.contains(&check_atom) {
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return None;
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}*/
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// IceWM (1.3.x and earlier) doesn't report supporting _NET_WM_NAME, but will nonetheless
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// provide us with a value for it. Note that the unofficial 1.4 fork of IceWM works fine.
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/*if !supported_hints.contains(&wm_name_atom) {
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return None;
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}*/
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// Of the WMs tested, only xmonad and dwm fail to provide a WM name.
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// Querying this property on the root window will give us the ID of a child window created by
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// the WM.
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let root_window_wm_check = {
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let result = unsafe {
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util::get_property(
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&xwin.display,
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xwin.root,
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check_atom,
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ffi::XA_WINDOW,
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)
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};
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let wm_check = result
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.ok()
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.and_then(|wm_check| wm_check.get(0).cloned());
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if let Some(wm_check) = wm_check {
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wm_check
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} else {
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return None;
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}
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};
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// Querying the same property on the child window we were given, we should get this child
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// window's ID again.
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let child_window_wm_check = {
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let result = unsafe {
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util::get_property(
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&xwin.display,
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root_window_wm_check,
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check_atom,
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ffi::XA_WINDOW,
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)
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};
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let wm_check = result
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.ok()
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.and_then(|wm_check| wm_check.get(0).cloned());
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if let Some(wm_check) = wm_check {
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wm_check
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} else {
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return None;
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}
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};
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// These values should be the same.
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if root_window_wm_check != child_window_wm_check {
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return None;
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}
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// All of that work gives us a window ID that we can get the WM name from.
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let wm_name = {
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let utf8_string_atom = unsafe { util::get_atom(&xwin.display, b"UTF8_STRING\0") }
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.unwrap_or(ffi::XA_STRING);
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let result = unsafe {
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util::get_property(
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&xwin.display,
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root_window_wm_check,
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wm_name_atom,
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utf8_string_atom,
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)
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};
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// IceWM requires this. IceWM was also the only WM tested that returns a null-terminated
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// string. For more fun trivia, IceWM is also unique in including version and uname
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// information in this string (this means you'll have to be careful if you want to match
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// against it, though).
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// The unofficial 1.4 fork of IceWM still includes the extra details, but properly
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// returns a UTF8 string that isn't null-terminated.
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let no_utf8 = if let Err(ref err) = result {
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err.is_actual_property_type(ffi::XA_STRING)
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} else {
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false
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};
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if no_utf8 {
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unsafe {
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util::get_property(
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&xwin.display,
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root_window_wm_check,
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wm_name_atom,
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ffi::XA_STRING,
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)
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}
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} else {
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result
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}
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}.ok();
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wm_name.and_then(|wm_name| String::from_utf8(wm_name).ok())
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}
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impl Window2 {
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@ -179,15 +313,24 @@ impl Window2 {
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win
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};
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let x_window = Arc::new(XWindow {
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display: display.clone(),
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window,
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root,
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screen_id,
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});
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// These values will cease to be correct if the user replaces the WM during the life of
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// the window, so hopefully they don't do that.
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let supported_hints = get_supported_hints(&x_window);
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let wm_name = get_wm_name(&x_window, &supported_hints);
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let window = Window2 {
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x: Arc::new(XWindow {
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display: display.clone(),
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window,
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root,
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screen_id,
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}),
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x: x_window,
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cursor: Mutex::new(MouseCursor::Default),
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cursor_state: Mutex::new(CursorState::Normal),
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supported_hints,
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wm_name,
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};
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// Title must be set before mapping, lest some tiling window managers briefly pick up on
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@ -531,80 +674,281 @@ impl Window2 {
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}
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}
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fn get_geometry(&self) -> Option<(i32, i32, u32, u32, u32)> {
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unsafe {
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use std::mem;
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fn get_frame_extents(&self) -> Option<util::FrameExtents> {
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let extents_atom = unsafe { util::get_atom(&self.x.display, b"_NET_FRAME_EXTENTS\0") }
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.expect("Failed to call XInternAtom (_NET_FRAME_EXTENTS)");
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if !self.supported_hints.contains(&extents_atom) {
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return None;
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}
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// Of the WMs tested, xmonad, i3, dwm, IceWM (1.3.x and earlier), and blackbox don't
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// support this. As this is part of EWMH (Extended Window Manager Hints), it's likely to
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// be unsupported by many smaller WMs.
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let extents: Option<Vec<c_ulong>> = unsafe {
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util::get_property(
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&self.x.display,
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self.x.window,
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extents_atom,
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ffi::XA_CARDINAL,
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)
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}.ok();
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extents.and_then(|extents| {
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if extents.len() >= 4 {
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Some(util::FrameExtents {
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left: extents[0],
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right: extents[1],
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top: extents[2],
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bottom: extents[3],
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})
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} else {
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None
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}
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})
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}
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fn is_top_level(&self, id: ffi::Window) -> Option<bool> {
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let client_list_atom = unsafe { util::get_atom(&self.x.display, b"_NET_CLIENT_LIST\0") }
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.expect("Failed to call XInternAtom (_NET_CLIENT_LIST)");
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if !self.supported_hints.contains(&client_list_atom) {
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return None;
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}
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let client_list: Option<Vec<ffi::Window>> = unsafe {
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util::get_property(
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&self.x.display,
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self.x.root,
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client_list_atom,
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ffi::XA_WINDOW,
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)
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}.ok();
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client_list.map(|client_list| {
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client_list.contains(&id)
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})
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}
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fn get_geometry(&self) -> Option<util::WindowGeometry> {
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// Position relative to root window.
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// With rare exceptions, this is the position of a nested window. Cases where the window
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// isn't nested are outlined in the comments throghout this function, but in addition to
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// that, fullscreen windows sometimes aren't nested.
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let (inner_x_rel_root, inner_y_rel_root, child) = unsafe {
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let mut inner_x_rel_root: c_int = mem::uninitialized();
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let mut inner_y_rel_root: c_int = mem::uninitialized();
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let mut child: ffi::Window = mem::uninitialized();
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(self.x.display.xlib.XTranslateCoordinates)(
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self.x.display.display,
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self.x.window,
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self.x.root,
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0,
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0,
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&mut inner_x_rel_root,
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&mut inner_y_rel_root,
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&mut child,
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);
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(inner_x_rel_root, inner_y_rel_root, child)
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};
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let (inner_x, inner_y, width, height, border) = unsafe {
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let mut root: ffi::Window = mem::uninitialized();
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let mut x: libc::c_int = mem::uninitialized();
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let mut y: libc::c_int = mem::uninitialized();
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let mut width: libc::c_uint = mem::uninitialized();
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let mut height: libc::c_uint = mem::uninitialized();
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let mut border: libc::c_uint = mem::uninitialized();
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let mut depth: libc::c_uint = mem::uninitialized();
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// The same caveat outlined in the comment above for XTranslateCoordinates applies
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// here as well. The only difference is that this position is relative to the parent
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// window, rather than the root window.
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let mut inner_x: c_int = mem::uninitialized();
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let mut inner_y: c_int = mem::uninitialized();
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// The width and height here are for the client area.
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let mut width: c_uint = mem::uninitialized();
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let mut height: c_uint = mem::uninitialized();
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// xmonad and dwm were the only WMs tested that use the border return at all.
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// The majority of WMs seem to simply fill it with 0 unconditionally.
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let mut border: c_uint = mem::uninitialized();
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let mut depth: c_uint = mem::uninitialized();
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// Get non-positioning data from winit window
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if (self.x.display.xlib.XGetGeometry)(self.x.display.display, self.x.window,
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&mut root, &mut x, &mut y, &mut width, &mut height,
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&mut border, &mut depth) == 0
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{
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let status = (self.x.display.xlib.XGetGeometry)(
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self.x.display.display,
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self.x.window,
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&mut root,
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&mut inner_x,
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&mut inner_y,
|
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&mut width,
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&mut height,
|
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&mut border,
|
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&mut depth,
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);
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if status == 0 {
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return None;
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}
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|
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let width_out = width;
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let height_out = height;
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let border_out = border;
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(inner_x, inner_y, width, height, border)
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};
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|
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// Some window managers like i3wm will actually nest application
|
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// windows (like those opened by winit) within other windows to, for
|
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// example, add decorations. Initially when debugging this method on
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// i3, the x and y positions were always returned as "2".
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//
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// The solution that other xlib abstractions use is to climb up the
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// window hierarchy until just below the root window, and that
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// window must be used to determine the appropriate position.
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// The first condition is only false for un-nested windows, but isn't always false for
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// un-nested windows. Mutter/Muffin/Budgie and Marco present a mysterious discrepancy:
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// when y is on the range [0, 2] and if the window has been unfocused since being
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// undecorated (or was undecorated upon construction), the first condition is true,
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// requiring us to rely on the second condition.
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let nested = !(self.x.window == child || self.is_top_level(child) == Some(true));
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// Hopefully the WM supports EWMH, allowing us to get exact info on the window frames.
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if let Some(mut extents) = self.get_frame_extents() {
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// Mutter/Muffin/Budgie and Marco preserve their decorated frame extents when
|
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// decorations are disabled, but since the window becomes un-nested, it's easy to
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// catch.
|
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if !nested {
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extents = util::FrameExtents::new(0, 0, 0, 0);
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}
|
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|
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// The difference between the nested window's position and the outermost window's
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// position is equivalent to the frame size. In most scenarios, this is equivalent to
|
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// manually climbing the hierarchy as is done in the case below. Here's a list of
|
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// known discrepancies:
|
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// * Mutter/Muffin/Budgie gives decorated windows a margin of 9px (only 7px on top) in
|
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// addition to a 1px semi-transparent border. The margin can be easily observed by
|
||||
// using a screenshot tool to get a screenshot of a selected window, and is
|
||||
// presumably used for drawing drop shadows. Getting window geometry information
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// via hierarchy-climbing results in this margin being included in both the
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// position and outer size, so a window positioned at (0, 0) would be reported as
|
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// having a position (-10, -8).
|
||||
// * Compiz has a drop shadow margin just like Mutter/Muffin/Budgie, though it's 10px
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// on all sides, and there's no additional border.
|
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// * Enlightenment otherwise gets a y position equivalent to inner_y_rel_root.
|
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// Without decorations, there's no difference. This is presumably related to
|
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// Enlightenment's fairly unique concept of window position; it interprets
|
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// positions given to XMoveWindow as a client area position rather than a position
|
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// of the overall window.
|
||||
let abs_x = inner_x_rel_root - extents.left as c_int;
|
||||
let abs_y = inner_y_rel_root - extents.top as c_int;
|
||||
|
||||
Some(util::WindowGeometry {
|
||||
x: abs_x,
|
||||
y: abs_y,
|
||||
width,
|
||||
height,
|
||||
frame: extents,
|
||||
})
|
||||
} else if nested {
|
||||
// If the position value we have is for a nested window used as the client area, we'll
|
||||
// just climb up the hierarchy and get the geometry of the outermost window we're
|
||||
// nested in.
|
||||
let window = {
|
||||
let root = self.x.root;
|
||||
let mut window = self.x.window;
|
||||
loop {
|
||||
let candidate = self.x.get_parent_window(window).unwrap();
|
||||
let candidate = unsafe {
|
||||
self.x.get_parent_window(window).unwrap()
|
||||
};
|
||||
if candidate == root {
|
||||
break window;
|
||||
}
|
||||
|
||||
window = candidate;
|
||||
}
|
||||
};
|
||||
|
||||
if (self.x.display.xlib.XGetGeometry)(self.x.display.display, window,
|
||||
&mut root, &mut x, &mut y, &mut width, &mut height,
|
||||
&mut border, &mut depth) == 0
|
||||
{
|
||||
return None;
|
||||
}
|
||||
let (outer_x, outer_y, outer_width, outer_height) = unsafe {
|
||||
let mut root: ffi::Window = mem::uninitialized();
|
||||
let mut outer_x: c_int = mem::uninitialized();
|
||||
let mut outer_y: c_int = mem::uninitialized();
|
||||
let mut outer_width: c_uint = mem::uninitialized();
|
||||
let mut outer_height: c_uint = mem::uninitialized();
|
||||
let mut border: c_uint = mem::uninitialized();
|
||||
let mut depth: c_uint = mem::uninitialized();
|
||||
|
||||
Some((x as i32, y as i32, width_out as u32, height_out as u32, border_out as u32))
|
||||
let status = (self.x.display.xlib.XGetGeometry)(
|
||||
self.x.display.display,
|
||||
window,
|
||||
&mut root,
|
||||
&mut outer_x,
|
||||
&mut outer_y,
|
||||
&mut outer_width,
|
||||
&mut outer_height,
|
||||
&mut border,
|
||||
&mut depth,
|
||||
);
|
||||
|
||||
if status == 0 {
|
||||
return None;
|
||||
}
|
||||
|
||||
(outer_x, outer_y, outer_width, outer_height)
|
||||
};
|
||||
|
||||
// Since we have the geometry of the outermost window and the geometry of the client
|
||||
// area, we can figure out what's in between.
|
||||
let frame = {
|
||||
let diff_x = outer_width.saturating_sub(width);
|
||||
let diff_y = outer_height.saturating_sub(height);
|
||||
let offset_y = inner_y_rel_root.saturating_sub(outer_y) as c_uint;
|
||||
|
||||
let left = diff_x / 2;
|
||||
let right = left;
|
||||
let top = offset_y;
|
||||
let bottom = diff_y.saturating_sub(offset_y);
|
||||
|
||||
util::FrameExtents::new(left.into(), right.into(), top.into(), bottom.into())
|
||||
};
|
||||
|
||||
Some(util::WindowGeometry {
|
||||
x: outer_x,
|
||||
y: outer_y,
|
||||
width,
|
||||
height,
|
||||
frame,
|
||||
})
|
||||
} else {
|
||||
// This is the case for xmonad and dwm, AKA the only WMs tested that supplied a
|
||||
// border value. This is convenient, since we can use it to get an accurate frame.
|
||||
let frame = util::FrameExtents::from_border(border.into());
|
||||
Some(util::WindowGeometry {
|
||||
x: inner_x,
|
||||
y: inner_y,
|
||||
width,
|
||||
height,
|
||||
frame,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn get_position(&self) -> Option<(i32, i32)> {
|
||||
self.get_geometry().map(|(x, y, _, _, _)| (x, y))
|
||||
self.get_geometry().map(|geo| geo.get_position())
|
||||
}
|
||||
|
||||
pub fn set_position(&self, x: i32, y: i32) {
|
||||
unsafe { (self.x.display.xlib.XMoveWindow)(self.x.display.display, self.x.window, x as libc::c_int, y as libc::c_int); }
|
||||
pub fn set_position(&self, mut x: i32, mut y: i32) {
|
||||
if let Some(ref wm_name) = self.wm_name {
|
||||
// There are a few WMs that set client area position rather than window position, so
|
||||
// we'll translate for consistency.
|
||||
if ["Enlightenment", "FVWM"].contains(&wm_name.as_str()) {
|
||||
if let Some(extents) = self.get_frame_extents() {
|
||||
x += extents.left as i32;
|
||||
y += extents.top as i32;
|
||||
}
|
||||
}
|
||||
}
|
||||
unsafe {
|
||||
(self.x.display.xlib.XMoveWindow)(
|
||||
self.x.display.display,
|
||||
self.x.window,
|
||||
x as c_int,
|
||||
y as c_int,
|
||||
);
|
||||
}
|
||||
self.x.display.check_errors().expect("Failed to call XMoveWindow");
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn get_inner_size(&self) -> Option<(u32, u32)> {
|
||||
self.get_geometry().map(|(_, _, w, h, _)| (w, h))
|
||||
self.get_geometry().map(|geo| geo.get_inner_size())
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn get_outer_size(&self) -> Option<(u32, u32)> {
|
||||
self.get_geometry().map(|(_, _, w, h, b)| (w + b, h + b)) // TODO: is this really outside?
|
||||
self.get_geometry().map(|geo| geo.get_outer_size())
|
||||
}
|
||||
|
||||
#[inline]
|
||||
|
|
|
|||
Loading…
Reference in a new issue