1 files changed, 174 insertions, 0 deletions
diff --git a/src/clients/client.rs b/src/clients/client.rs
new file mode 100644
index 0000000..a7b1a8d
--- /dev/null
+++ b/src/clients/client.rs
@@ -0,0 +1,174 @@
+use xcb::{
+    x::{
+        ChangeProperty, ChangeWindowAttributes, ConfigWindow, ConfigureNotifyEvent,
+        ConfigureWindow, Cw, EventMask, MapWindow, SendEvent, SendEventDest, Window,
+    },
+    Xid,
+};
+
+use crate::{config::BORDER_WIDTH, conn_info::Connection};
+
+use super::hints;
+
+/// Information about a single client / window
+#[derive(Debug)]
+pub struct Client {
+    /// The corresponding X11 window
+    window: Window,
+
+    x: i16,
+    y: i16,
+    width: u16,
+    height: u16,
+    border_width: u16,
+    mapped: bool,
+
+    urgent: bool,
+    never_focus: bool,
+}
+
+impl Client {
+    pub const fn new(window: Window) -> Self {
+        Self {
+            window,
+            x: 0,
+            y: 0,
+            width: 0,
+            height: 0,
+            border_width: BORDER_WIDTH,
+            mapped: false,
+            urgent: false,
+            never_focus: false,
+        }
+    }
+
+    /// Send a configure configure notify event with the current geometry.
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn configure_notify(&self, conn: &Connection<'_>) {
+        conn.send_request(&SendEvent {
+            destination: SendEventDest::Window(self.window),
+            event_mask: EventMask::STRUCTURE_NOTIFY,
+            event: &ConfigureNotifyEvent::new(
+                self.window,
+                self.window,
+                Window::none(),
+                self.x,
+                self.y,
+                self.width,
+                self.height,
+                self.border_width,
+                false,
+            ),
+            propagate: false,
+        });
+    }
+
+    /// Set this client's geometry, also updating the X11 window if needed.
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn set_geom(
+        &mut self,
+        conn: &Connection<'_>,
+        x: i16,
+        y: i16,
+        width: u16,
+        height: u16,
+        border_width: u16,
+    ) {
+        if (x, y, width, height, border_width)
+            == (self.x, self.y, self.width, self.height, self.border_width)
+        {
+            return;
+        }
+
+        self.x = x;
+        self.y = y;
+        self.width = width;
+        self.height = height;
+        self.border_width = border_width;
+
+        conn.send_request(&ConfigureWindow {
+            window: self.window,
+            value_list: &[
+                ConfigWindow::X(self.x.into()),
+                ConfigWindow::Y(self.y.into()),
+                ConfigWindow::Width(self.width.into()),
+                ConfigWindow::Height(self.height.into()),
+                ConfigWindow::BorderWidth(self.border_width.into()),
+            ],
+        });
+    }
+
+    /// Set the border colour of the X11 window to the given value (see `crate::colours::Colours`)
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn set_border(&self, conn: &Connection<'_>, colour: u32) {
+        conn.send_request(&ChangeWindowAttributes {
+            window: self.window(),
+            value_list: &[Cw::BorderPixel(colour)],
+        });
+    }
+
+    /// Ensure this client is currently mapped / visible
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn ensure_mapped(&mut self, conn: &Connection<'_>) {
+        if !self.mapped {
+            conn.send_request(&MapWindow {
+                window: self.window,
+            });
+            self.mapped = true;
+        }
+    }
+
+    /// Get the associated window
+    pub const fn window(&self) -> Window {
+        self.window
+    }
+
+    /// Set the event mask for this window
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn set_event_mask(&self, conn: &Connection<'_>, event_mask: EventMask) {
+        conn.send_request(&ChangeWindowAttributes {
+            window: self.window(),
+            value_list: &[Cw::EventMask(event_mask)],
+        });
+    }
+
+    /// Sync the non-geometry related properties with EWMH hints
+    /// This function does not check for success, so `conn.flush()` should be called after.
+    pub fn sync_properties(&mut self, conn: &Connection<'_>, focused: bool) {
+        let Some(mut hints) = hints::Xwm::get(conn, self.window) else {
+            return;
+        };
+
+        if focused && hints.is_urgent() {
+            hints.set_urgent(false);
+            hints.apply(conn, self.window);
+        } else {
+            self.urgent = hints.is_urgent();
+        }
+
+        self.never_focus = hints.input().is_some_and(|i| !i);
+    }
+
+    /// Set the given window as withdrawn / not withdrawn.
+    pub fn set_withdrawn(&self, conn: &Connection<'_>, withdrawn: bool) {
+        conn.send_request(&ChangeProperty {
+            mode: xcb::x::PropMode::Replace,
+            window: self.window,
+            property: conn.atoms.wm_state,
+            r#type: conn.atoms.wm_state,
+            data: &[u8::from(!withdrawn), 0_u8],
+        });
+    }
+
+    pub fn set_urgent(&mut self, urgent: bool) {
+        self.urgent = urgent;
+    }
+
+    pub const fn border_width(&self) -> u16 {
+        self.border_width
+    }
+
+    pub const fn never_focus(&self) -> bool {
+        self.never_focus
+    }
+}