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x11: handle setting cursor to None (= hide)

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refs: https://github.com/wez/wezterm/issues/618
This commit is contained in:
Wez Furlong 2021-04-03 05:43:01 -07:00
parent 708b383791
commit d7b78b4163
1 changed files with 84 additions and 0 deletions
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84
window/src/os/x11/cursor.rs
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@ -167,7 +167,91 @@ impl CursorInfo {
Ok(())
}
fn create_blank(&mut self, conn: &Rc<XConnection>) -> anyhow::Result<u32> {
let mut pixels = [0u8; 4];
let image = unsafe {
xcb_util::ffi::image::xcb_image_create_native(
conn.conn().get_raw_conn(),
1,
1,
xcb::xproto::IMAGE_FORMAT_Z_PIXMAP,
32,
std::ptr::null_mut(),
pixels.len() as u32,
pixels.as_mut_ptr(),
)
};
ensure!(!image.is_null(), "failed to create native image");
let pixmap = conn.generate_id();
xcb::xproto::create_pixmap_checked(conn, 32, pixmap, conn.root, 1, 1)
.request_check()
.context("create_pixmap")?;
let gc = conn.generate_id();
xcb::create_gc(conn.conn(), gc, pixmap, &[]);
unsafe {
xcb_util::ffi::image::xcb_image_put(
conn.conn().get_raw_conn(),
pixmap,
gc,
image,
0,
0,
0,
)
};
xcb::free_gc(conn.conn(), gc);
let pic = conn.generate_id();
xcb::render::create_picture_checked(
conn.conn(),
pic,
pixmap,
self.pict_format_id.unwrap(),
&[],
)
.request_check()
.context("create_picture")?;
xcb::xproto::free_pixmap(conn.conn(), pixmap);
let cursor_id: xcb::ffi::xcb_cursor_t = conn.generate_id();
xcb::render::create_cursor_checked(conn.conn(), cursor_id, pic, 0, 0)
.request_check()
.context("create_cursor")?;
xcb::render::free_picture(conn.conn(), pic);
unsafe {
xcb_util::ffi::image::xcb_image_destroy(image);
}
Ok(cursor_id)
}
fn load_themed(&mut self, conn: &Rc<XConnection>, cursor: Option<MouseCursor>) -> Option<u32> {
if cursor.is_none() {
match self.create_blank(conn) {
Ok(cursor_id) => {
self.cursors.insert(
cursor,
XcbCursor {
id: cursor_id,
conn: Rc::downgrade(&conn),
},
);
return Some(cursor_id);
}
Err(err) => {
log::error!("Failed to create blank cursor: {:#}", err);
return self.load_themed(conn, Some(MouseCursor::Arrow));
}
}
}
let theme = self.theme.as_ref()?;
if self.pict_format_id.is_none() {
return None;