13 files changed, 190 insertions, 16 deletions

diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
index ac23cd9a..3b01b64f 100644
--- a/include/backend/drm/drm.h
+++ b/include/backend/drm/drm.h
@@ -104,10 +104,14 @@ struct wlr_drm_backend {
 };
 
 enum wlr_drm_connector_state {
+	// Connector is available but no output is plugged in
 	WLR_DRM_CONN_DISCONNECTED,
+	// An output just has been plugged in and is waiting for a modeset
 	WLR_DRM_CONN_NEEDS_MODESET,
 	WLR_DRM_CONN_CLEANUP,
 	WLR_DRM_CONN_CONNECTED,
+	// Connector disappeared, waiting for being destroyed on next page-flip
+	WLR_DRM_CONN_DISAPPEARED,
 };
 
 struct wlr_drm_mode {
diff --git a/include/rootston/cursor.h b/include/rootston/cursor.h
index 2c687a39..b5bb682f 100644
--- a/include/rootston/cursor.h
+++ b/include/rootston/cursor.h
@@ -1,6 +1,7 @@
 #ifndef ROOTSTON_CURSOR_H
 #define ROOTSTON_CURSOR_H
 
+#include <wlr/types/wlr_pointer_constraints_v1.h>
 #include "rootston/seat.h"
 
 enum roots_cursor_mode {
@@ -14,6 +15,9 @@ struct roots_cursor {
 	struct roots_seat *seat;
 	struct wlr_cursor *cursor;
 
+	struct wlr_pointer_constraint_v1 *active_constraint;
+	pixman_region32_t confine; // invalid if active_constraint == NULL
+
 	const char *default_xcursor;
 
 	enum roots_cursor_mode mode;
@@ -28,6 +32,7 @@ struct roots_cursor {
 	uint32_t resize_edges;
 
 	struct roots_seat_view *pointer_view;
+	struct wlr_surface *wlr_surface;
 
 	struct wl_listener motion;
 	struct wl_listener motion_absolute;
@@ -44,6 +49,10 @@ struct roots_cursor {
 	struct wl_listener tool_button;
 
 	struct wl_listener request_set_cursor;
+
+	struct wl_listener focus_change;
+
+	struct wl_listener constraint_commit;
 };
 
 struct roots_cursor *roots_cursor_create(struct roots_seat *seat);
@@ -51,36 +60,46 @@ struct roots_cursor *roots_cursor_create(struct roots_seat *seat);
 void roots_cursor_destroy(struct roots_cursor *cursor);
 
 void roots_cursor_handle_motion(struct roots_cursor *cursor,
-		struct wlr_event_pointer_motion *event);
+	struct wlr_event_pointer_motion *event);
 
 void roots_cursor_handle_motion_absolute(struct roots_cursor *cursor,
-		struct wlr_event_pointer_motion_absolute *event);
+	struct wlr_event_pointer_motion_absolute *event);
 
 void roots_cursor_handle_button(struct roots_cursor *cursor,
-		struct wlr_event_pointer_button *event);
+	struct wlr_event_pointer_button *event);
 
 void roots_cursor_handle_axis(struct roots_cursor *cursor,
-		struct wlr_event_pointer_axis *event);
+	struct wlr_event_pointer_axis *event);
 
 void roots_cursor_handle_touch_down(struct roots_cursor *cursor,
-		struct wlr_event_touch_down *event);
+	struct wlr_event_touch_down *event);
 
 void roots_cursor_handle_touch_up(struct roots_cursor *cursor,
-		struct wlr_event_touch_up *event);
+	struct wlr_event_touch_up *event);
 
 void roots_cursor_handle_touch_motion(struct roots_cursor *cursor,
-		struct wlr_event_touch_motion *event);
+	struct wlr_event_touch_motion *event);
 
 void roots_cursor_handle_tool_axis(struct roots_cursor *cursor,
-		struct wlr_event_tablet_tool_axis *event);
+	struct wlr_event_tablet_tool_axis *event);
 
 void roots_cursor_handle_tool_tip(struct roots_cursor *cursor,
-		struct wlr_event_tablet_tool_tip *event);
+	struct wlr_event_tablet_tool_tip *event);
 
 void roots_cursor_handle_request_set_cursor(struct roots_cursor *cursor,
-		struct wlr_seat_pointer_request_set_cursor_event *event);
+	struct wlr_seat_pointer_request_set_cursor_event *event);
+
+void roots_cursor_handle_focus_change(struct roots_cursor *cursor,
+	struct wlr_seat_pointer_focus_change_event *event);
+
+void roots_cursor_handle_constraint_commit(struct roots_cursor *cursor);
 
 void roots_cursor_update_position(struct roots_cursor *cursor,
-		uint32_t time);
+	uint32_t time);
+
+void roots_cursor_update_focus(struct roots_cursor *cursor);
+
+void roots_cursor_constrain(struct roots_cursor *cursor,
+	struct wlr_pointer_constraint_v1 *constraint, double sx, double sy);
 
 #endif
diff --git a/include/rootston/desktop.h b/include/rootston/desktop.h
index 89d8af4a..90851a17 100644
--- a/include/rootston/desktop.h
+++ b/include/rootston/desktop.h
@@ -56,6 +56,7 @@ struct roots_desktop {
 	struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard;
 	struct wlr_screencopy_manager_v1 *screencopy;
 	struct wlr_tablet_manager_v2 *tablet_v2;
+	struct wlr_pointer_constraints_v1 *pointer_constraints;
 
 	struct wl_listener new_output;
 	struct wl_listener layout_change;
@@ -67,6 +68,7 @@ struct roots_desktop {
 	struct wl_listener input_inhibit_activate;
 	struct wl_listener input_inhibit_deactivate;
 	struct wl_listener virtual_keyboard_new;
+	struct wl_listener pointer_constraint;
 
 #ifdef WLR_HAS_XWAYLAND
 	struct wlr_xwayland *xwayland;
diff --git a/include/rootston/input.h b/include/rootston/input.h
index 2cdb13e6..31810b4d 100644
--- a/include/rootston/input.h
+++ b/include/rootston/input.h
@@ -16,7 +16,7 @@ struct roots_input {
 
 	struct wl_listener new_input;
 
-	struct wl_list seats;
+	struct wl_list seats; // roots_seat::link
 };
 
 struct roots_input *input_create(struct roots_server *server,
diff --git a/include/rootston/output.h b/include/rootston/output.h
index f78ee81d..69bc5126 100644
--- a/include/rootston/output.h
+++ b/include/rootston/output.h
@@ -28,6 +28,9 @@ struct roots_output {
 	struct wl_listener damage_destroy;
 };
 
+void rotate_child_position(double *sx, double *sy, double sw, double sh,
+	double pw, double ph, float rotation);
+
 void handle_new_output(struct wl_listener *listener, void *data);
 
 struct roots_view;
diff --git a/include/rootston/seat.h b/include/rootston/seat.h
index c5e584b6..7e7ee3e9 100644
--- a/include/rootston/seat.h
+++ b/include/rootston/seat.h
@@ -10,7 +10,7 @@ struct roots_seat {
 	struct roots_input *input;
 	struct wlr_seat *seat;
 	struct roots_cursor *cursor;
-	struct wl_list link;
+	struct wl_list link; // roots_input::seats
 
 	// coordinates of the first touch point if it exists
 	int32_t touch_id;
@@ -114,6 +114,7 @@ struct roots_tablet_tool {
 	struct wlr_tablet_v2_tablet_tool *tablet_v2_tool;
 
 	struct roots_seat *seat;
+	double tilt_x, tilt_y;
 
 	struct wl_listener set_cursor;
 	struct wl_listener tool_destroy;
@@ -122,6 +123,12 @@ struct roots_tablet_tool {
 	struct wl_listener tablet_destroy;
 };
 
+struct roots_pointer_constraint {
+	struct wlr_pointer_constraint_v1 *constraint;
+
+	struct wl_listener destroy;
+};
+
 struct roots_seat *roots_seat_create(struct roots_input *input, char *name);
 
 void roots_seat_destroy(struct roots_seat *seat);
diff --git a/include/wlr/types/wlr_box.h b/include/wlr/types/wlr_box.h
index 11a53b56..8e25918b 100644
--- a/include/wlr/types/wlr_box.h
+++ b/include/wlr/types/wlr_box.h
@@ -9,6 +9,7 @@
 #ifndef WLR_TYPES_WLR_BOX_H
 #define WLR_TYPES_WLR_BOX_H
 
+#include <pixman.h>
 #include <stdbool.h>
 #include <wayland-server.h>
 
@@ -40,4 +41,6 @@ void wlr_box_transform(const struct wlr_box *box,
 void wlr_box_rotated_bounds(const struct wlr_box *box, float rotation,
 	struct wlr_box *dest);
 
+void wlr_box_from_pixman_box32(const pixman_box32_t box, struct wlr_box *dest);
+
 #endif
diff --git a/include/wlr/types/wlr_cursor.h b/include/wlr/types/wlr_cursor.h
index ba582be9..44ced1f0 100644
--- a/include/wlr/types/wlr_cursor.h
+++ b/include/wlr/types/wlr_cursor.h
@@ -91,6 +91,18 @@ bool wlr_cursor_warp(struct wlr_cursor *cur, struct wlr_input_device *dev,
 void wlr_cursor_absolute_to_layout_coords(struct wlr_cursor *cur,
 	struct wlr_input_device *dev, double x, double y, double *lx, double *ly);
 
+
+/**
+ * Warp the cursor to the given x and y coordinates. If the given point is out
+ * of the layout boundaries or constraints, the closest point will be used.
+ * If one coordinate is NAN, it will be ignored.
+ *
+ * `dev` may be passed to respect device mapping constraints. If `dev` is NULL,
+ * device mapping constraints will be ignored.
+ */
+void wlr_cursor_warp_closest(struct wlr_cursor *cur,
+	struct wlr_input_device *dev, double x, double y);
+
 /**
  * Warp the cursor to the given x and y in absolute 0..1 coordinates. If the
  * given point is out of the layout boundaries or constraints, the closest point
diff --git a/include/wlr/types/wlr_pointer_constraints_v1.h b/include/wlr/types/wlr_pointer_constraints_v1.h
new file mode 100644
index 00000000..fef8c2e9
--- /dev/null
+++ b/include/wlr/types/wlr_pointer_constraints_v1.h
@@ -0,0 +1,102 @@
+/*
+ * This an unstable interface of wlroots. No guarantees are made regarding the
+ * future consistency of this API.
+ */
+#ifndef WLR_USE_UNSTABLE
+#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
+#endif
+
+#ifndef WLR_TYPES_WLR_POINTER_CONSTRAINTS_V1_H
+#define WLR_TYPES_WLR_POINTER_CONSTRAINTS_V1_H
+
+#include <stdint.h>
+#include <wayland-server.h>
+#include <pixman.h>
+#include <wlr/types/wlr_box.h>
+#include <wlr/types/wlr_seat.h>
+#include "pointer-constraints-unstable-v1-protocol.h"
+
+struct wlr_seat;
+
+enum wlr_pointer_constraint_v1_type {
+	WLR_POINTER_CONSTRAINT_V1_LOCKED,
+	WLR_POINTER_CONSTRAINT_V1_CONFINED,
+};
+
+enum wlr_pointer_constraint_v1_state_field {
+	WLR_POINTER_CONSTRAINT_V1_STATE_REGION = 1 << 0,
+	WLR_POINTER_CONSTRAINT_V1_STATE_CURSOR_HINT = 1 << 1,
+};
+
+struct wlr_pointer_constraint_v1_state {
+	uint32_t committed; // enum wlr_pointer_constraint_v1_state_field
+	pixman_region32_t region;
+
+	// only valid for locked_pointer
+	struct {
+		double x, y;
+	} cursor_hint;
+};
+
+struct wlr_pointer_constraint_v1 {
+	struct wlr_pointer_constraints_v1 *pointer_constraints;
+
+	struct wl_resource *resource;
+	struct wlr_surface *surface;
+	struct wlr_seat *seat;
+	enum zwp_pointer_constraints_v1_lifetime lifetime;
+	enum wlr_pointer_constraint_v1_type type;
+	pixman_region32_t region;
+
+	struct wlr_pointer_constraint_v1_state current, pending;
+
+	struct wl_listener surface_commit;
+	struct wl_listener surface_destroy;
+	struct wl_listener seat_destroy;
+
+	struct wl_list link; // wlr_pointer_constraints_v1::constraints
+
+	struct {
+		struct wl_signal destroy;
+	} events;
+
+	void *data;
+};
+
+struct wlr_pointer_constraints_v1 {
+	struct wl_list resources; // wl_resource_get_link
+	struct wl_global *global;
+
+	struct {
+		/**
+		 * Called when a new pointer constraint is created.
+		 *
+		 * data: struct wlr_pointer_constraint_v1 *
+		 */
+		struct wl_signal new_constraint;
+	} events;
+
+	struct wl_list constraints; // wlr_pointer_constraint_v1::link
+
+	void *data;
+};
+
+struct wlr_pointer_constraints_v1 *wlr_pointer_constraints_v1_create(
+	struct wl_display *display);
+void wlr_pointer_constraints_v1_destroy(
+	struct wlr_pointer_constraints_v1 *pointer_constraints);
+
+struct wlr_pointer_constraint_v1 *
+	wlr_pointer_constraints_v1_constraint_for_surface(
+	struct wlr_pointer_constraints_v1 *pointer_constraints,
+	struct wlr_surface *surface, struct wlr_seat *seat);
+
+void wlr_pointer_constraint_v1_send_activated(
+	struct wlr_pointer_constraint_v1 *constraint);
+/**
+ * Deactivate the constraint. May destroy the constraint.
+ */
+void wlr_pointer_constraint_v1_send_deactivated(
+	struct wlr_pointer_constraint_v1 *constraint);
+
+#endif
diff --git a/include/wlr/types/wlr_region.h b/include/wlr/types/wlr_region.h
index 3c4a0532..ec7f73aa 100644
--- a/include/wlr/types/wlr_region.h
+++ b/include/wlr/types/wlr_region.h
@@ -10,8 +10,7 @@
 #define WLR_TYPES_WLR_REGION_H
 
 #include <pixman.h>
-
-struct wl_resource;
+#include <wayland-server-protocol.h>
 
 /*
  * Creates a new region resource with the provided new ID. If `resource_list` is
diff --git a/include/wlr/types/wlr_seat.h b/include/wlr/types/wlr_seat.h
index b3c02cf2..59de8207 100644
--- a/include/wlr/types/wlr_seat.h
+++ b/include/wlr/types/wlr_seat.h
@@ -146,6 +146,10 @@ struct wlr_seat_pointer_state {
 	uint32_t grab_time;
 
 	struct wl_listener surface_destroy;
+
+	struct {
+		struct wl_signal focus_change; // wlr_seat_pointer_focus_change_event
+	} events;
 };
 
 // TODO: May be useful to be able to simulate keyboard input events
@@ -238,6 +242,12 @@ struct wlr_seat_pointer_request_set_cursor_event {
 	int32_t hotspot_x, hotspot_y;
 };
 
+struct wlr_seat_pointer_focus_change_event {
+	struct wlr_seat *seat;
+	struct wlr_surface *old_surface, *new_surface;
+	double sx, sy;
+};
+
 /**
  * Allocates a new wlr_seat and adds a wl_seat global to the display.
  */
@@ -546,6 +556,9 @@ bool wlr_seat_touch_has_grab(struct wlr_seat *seat);
 bool wlr_seat_validate_grab_serial(struct wlr_seat *seat, uint32_t serial);
 
 struct wlr_seat_client *wlr_seat_client_from_resource(
-		struct wl_resource *resource);
+	struct wl_resource *resource);
+
+struct wlr_seat_client *wlr_seat_client_from_pointer_resource(
+	struct wl_resource *resource);
 
 #endif
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index 063f9e26..bfbfbcc8 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -82,6 +82,11 @@ struct wlr_surface {
 	 */
 	pixman_region32_t opaque_region;
 	/**
+	 * The current input region, in surface-local coordinates. It is clipped to
+	 * the surface bounds.
+	 */
+	pixman_region32_t input_region;
+	/**
 	 * `current` contains the current, committed surface state. `pending`
 	 * accumulates state changes from the client between commits and shouldn't
 	 * be accessed by the compositor directly. `previous` contains the state of
diff --git a/include/wlr/util/region.h b/include/wlr/util/region.h
index 32387bfb..4aca07e1 100644
--- a/include/wlr/util/region.h
+++ b/include/wlr/util/region.h
@@ -16,6 +16,8 @@
 
 #ifndef WLR_UTIL_REGION_H
 #define WLR_UTIL_REGION_H
+
+#include <stdbool.h>
 #include <pixman.h>
 #include <wayland-server.h>
 
@@ -48,4 +50,7 @@ void wlr_region_expand(pixman_region32_t *dst, pixman_region32_t *src,
 void wlr_region_rotated_bounds(pixman_region32_t *dst, pixman_region32_t *src,
 	float rotation, int ox, int oy);
 
+bool wlr_region_confine(pixman_region32_t *region, double x1, double y1, double x2,
+	double y2, double *x2_out, double *y2_out);
+
 #endif