1 files changed, 384 insertions, 0 deletions

diff --git a/sway/input/cursor.c b/sway/input/cursor.c
new file mode 100644
index 00000000..15a61cbf
--- /dev/null
+++ b/sway/input/cursor.c
@@ -0,0 +1,384 @@
+#define _XOPEN_SOURCE 700
+#ifdef __linux__
+#include <linux/input-event-codes.h>
+#elif __FreeBSD__
+#include <dev/evdev/input-event-codes.h>
+#endif
+#include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_xcursor_manager.h>
+#include "list.h"
+#include "log.h"
+#include "sway/input/cursor.h"
+#include "sway/layers.h"
+#include "sway/output.h"
+#include "sway/tree/view.h"
+#include "wlr-layer-shell-unstable-v1-protocol.h"
+
+static struct wlr_surface *layer_surface_at(struct sway_output *output,
+		struct wl_list *layer, double ox, double oy, double *sx, double *sy) {
+	struct sway_layer_surface *sway_layer;
+	wl_list_for_each_reverse(sway_layer, layer, link) {
+		struct wlr_surface *wlr_surface =
+			sway_layer->layer_surface->surface;
+		double _sx = ox - sway_layer->geo.x;
+		double _sy = oy - sway_layer->geo.y;
+		// TODO: Test popups/subsurfaces
+		if (wlr_surface_point_accepts_input(wlr_surface, _sx, _sy)) {
+			*sx = _sx;
+			*sy = _sy;
+			return wlr_surface;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * Returns the container at the cursor's position. If there is a surface at that
+ * location, it is stored in **surface (it may not be a view).
+ */
+static struct sway_container *container_at_cursor(struct sway_cursor *cursor,
+		struct wlr_surface **surface, double *sx, double *sy) {
+	// check for unmanaged views first
+	struct wl_list *unmanaged = &root_container.sway_root->xwayland_unmanaged;
+	struct sway_xwayland_unmanaged *unmanaged_surface;
+	wl_list_for_each_reverse(unmanaged_surface, unmanaged, link) {
+		struct wlr_xwayland_surface *xsurface =
+			unmanaged_surface->wlr_xwayland_surface;
+
+		double _sx = cursor->cursor->x - unmanaged_surface->lx;
+		double _sy = cursor->cursor->y - unmanaged_surface->ly;
+		if (wlr_surface_point_accepts_input(xsurface->surface, _sx, _sy)) {
+			*surface = xsurface->surface;
+			*sx = _sx;
+			*sy = _sy;
+			return NULL;
+		}
+	}
+
+	// find the output the cursor is on
+	struct wlr_output_layout *output_layout =
+		root_container.sway_root->output_layout;
+	struct wlr_output *wlr_output =
+		wlr_output_layout_output_at(output_layout,
+				cursor->cursor->x, cursor->cursor->y);
+	if (wlr_output == NULL) {
+		return NULL;
+	}
+	struct sway_output *output = wlr_output->data;
+	double ox = cursor->cursor->x, oy = cursor->cursor->y;
+	wlr_output_layout_output_coords(output_layout, wlr_output, &ox, &oy);
+
+	// find the focused workspace on the output for this seat
+	struct sway_container *ws =
+		seat_get_focus_inactive(cursor->seat, output->swayc);
+	if (ws && ws->type != C_WORKSPACE) {
+		ws = container_parent(ws, C_WORKSPACE);
+	}
+	if (!ws) {
+		return output->swayc;
+	}
+
+	if ((*surface = layer_surface_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
+				ox, oy, sx, sy))) {
+		return ws;
+	}
+	if ((*surface = layer_surface_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
+				ox, oy, sx, sy))) {
+		return ws;
+	}
+
+	struct sway_container *c;
+	if ((c = container_at(ws, cursor->cursor->x, cursor->cursor->y,
+					surface, sx, sy))) {
+		return c;
+	}
+
+	if ((*surface = layer_surface_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
+				ox, oy, sx, sy))) {
+		return ws;
+	}
+	if ((*surface = layer_surface_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
+				ox, oy, sx, sy))) {
+		return ws;
+	}
+
+	c = seat_get_focus_inactive(cursor->seat, output->swayc);
+	if (c) {
+		return c;
+	}
+	if (!c && output->swayc->children->length) {
+		c = output->swayc->children->items[0];
+		return c;
+	}
+
+	return output->swayc;
+}
+
+void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time) {
+	struct wlr_seat *seat = cursor->seat->wlr_seat;
+	struct wlr_surface *surface = NULL;
+	double sx, sy;
+	struct sway_container *c = container_at_cursor(cursor, &surface, &sx, &sy);
+	if (c && config->focus_follows_mouse) {
+		seat_set_focus_warp(cursor->seat, c, false);
+	}
+
+	// reset cursor if switching between clients
+	struct wl_client *client = NULL;
+	if (surface != NULL) {
+		client = wl_resource_get_client(surface->resource);
+	}
+	if (client != cursor->image_client) {
+		wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
+			"left_ptr", cursor->cursor);
+		cursor->image_client = client;
+	}
+
+	// send pointer enter/leave
+	if (surface != NULL) {
+		if (seat_is_input_allowed(cursor->seat, surface)) {
+			wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
+			wlr_seat_pointer_notify_motion(seat, time, sx, sy);
+		}
+	} else {
+		wlr_seat_pointer_clear_focus(seat);
+	}
+}
+
+static void handle_cursor_motion(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, motion);
+	struct wlr_event_pointer_motion *event = data;
+	wlr_cursor_move(cursor->cursor, event->device,
+		event->delta_x, event->delta_y);
+	cursor_send_pointer_motion(cursor, event->time_msec);
+}
+
+static void handle_cursor_motion_absolute(
+		struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor =
+		wl_container_of(listener, cursor, motion_absolute);
+	struct wlr_event_pointer_motion_absolute *event = data;
+	wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, event->y);
+	cursor_send_pointer_motion(cursor, event->time_msec);
+}
+
+void dispatch_cursor_button(struct sway_cursor *cursor,
+		uint32_t time_msec, uint32_t button, enum wlr_button_state state) {
+	struct wlr_surface *surface = NULL;
+	double sx, sy;
+	struct sway_container *cont =
+		container_at_cursor(cursor, &surface, &sx, &sy);
+	if (surface && wlr_surface_is_layer_surface(surface)) {
+		struct wlr_layer_surface *layer =
+			wlr_layer_surface_from_wlr_surface(surface);
+		if (layer->current.keyboard_interactive) {
+			seat_set_focus_layer(cursor->seat, layer);
+			return;
+		}
+	}
+	// Avoid moving keyboard focus from a surface that accepts it to one
+	// that does not unless the change would move us to a new workspace.
+	//
+	// This prevents, for example, losing focus when clicking on swaybar.
+	if (surface && cont && cont->type != C_VIEW) {
+		struct sway_container *new_ws = cont;
+		if (new_ws && new_ws->type != C_WORKSPACE) {
+			new_ws = container_parent(new_ws, C_WORKSPACE);
+		}
+		struct sway_container *old_ws = seat_get_focus(cursor->seat);
+		if (old_ws && old_ws->type != C_WORKSPACE) {
+			old_ws = container_parent(old_ws, C_WORKSPACE);
+		}
+		if (new_ws != old_ws) {
+			seat_set_focus(cursor->seat, cont);
+		}
+	} else {
+		seat_set_focus(cursor->seat, cont);
+	}
+
+	wlr_seat_pointer_notify_button(cursor->seat->wlr_seat,
+			time_msec, button, state);
+}
+
+static void handle_cursor_button(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, button);
+	struct wlr_event_pointer_button *event = data;
+	dispatch_cursor_button(cursor,
+			event->time_msec, event->button, event->state);
+}
+
+static void handle_cursor_axis(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, axis);
+	struct wlr_event_pointer_axis *event = data;
+	wlr_seat_pointer_notify_axis(cursor->seat->wlr_seat, event->time_msec,
+		event->orientation, event->delta);
+}
+
+static void handle_touch_down(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_down);
+	struct wlr_event_touch_down *event = data;
+	wlr_log(L_DEBUG, "TODO: handle touch down event: %p", event);
+}
+
+static void handle_touch_up(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_up);
+	struct wlr_event_touch_up *event = data;
+	wlr_log(L_DEBUG, "TODO: handle touch up event: %p", event);
+}
+
+static void handle_touch_motion(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor =
+		wl_container_of(listener, cursor, touch_motion);
+	struct wlr_event_touch_motion *event = data;
+	wlr_log(L_DEBUG, "TODO: handle touch motion event: %p", event);
+}
+
+static void handle_tool_axis(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_axis);
+	struct wlr_event_tablet_tool_axis *event = data;
+
+	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X) &&
+			(event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
+		wlr_cursor_warp_absolute(cursor->cursor, event->device,
+			event->x, event->y);
+		cursor_send_pointer_motion(cursor, event->time_msec);
+	} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) {
+		wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, -1);
+		cursor_send_pointer_motion(cursor, event->time_msec);
+	} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
+		wlr_cursor_warp_absolute(cursor->cursor, event->device, -1, event->y);
+		cursor_send_pointer_motion(cursor, event->time_msec);
+	}
+}
+
+static void handle_tool_tip(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_tip);
+	struct wlr_event_tablet_tool_tip *event = data;
+	dispatch_cursor_button(cursor, event->time_msec,
+			BTN_LEFT, event->state == WLR_TABLET_TOOL_TIP_DOWN ?
+				WLR_BUTTON_PRESSED : WLR_BUTTON_RELEASED);
+}
+
+static void handle_tool_button(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_button);
+	struct wlr_event_tablet_tool_button *event = data;
+	// TODO: the user may want to configure which tool buttons are mapped to
+	// which simulated pointer buttons
+	switch (event->state) {
+	case WLR_BUTTON_PRESSED:
+		if (cursor->tool_buttons == 0) {
+			dispatch_cursor_button(cursor,
+					event->time_msec, BTN_RIGHT, event->state);
+		}
+		cursor->tool_buttons++;
+		break;
+	case WLR_BUTTON_RELEASED:
+		if (cursor->tool_buttons == 1) {
+			dispatch_cursor_button(cursor,
+					event->time_msec, BTN_RIGHT, event->state);
+		}
+		cursor->tool_buttons--;
+		break;
+	}
+}
+
+static void handle_request_set_cursor(struct wl_listener *listener,
+		void *data) {
+	struct sway_cursor *cursor =
+		wl_container_of(listener, cursor, request_set_cursor);
+	struct wlr_seat_pointer_request_set_cursor_event *event = data;
+
+	struct wl_client *focused_client = NULL;
+	struct wlr_surface *focused_surface =
+		cursor->seat->wlr_seat->pointer_state.focused_surface;
+	if (focused_surface != NULL) {
+		focused_client = wl_resource_get_client(focused_surface->resource);
+	}
+
+	// TODO: check cursor mode
+	if (focused_client == NULL ||
+			event->seat_client->client != focused_client) {
+		wlr_log(L_DEBUG, "denying request to set cursor from unfocused client");
+		return;
+	}
+
+	wlr_cursor_set_surface(cursor->cursor, event->surface, event->hotspot_x,
+		event->hotspot_y);
+	cursor->image_client = focused_client;
+}
+
+void sway_cursor_destroy(struct sway_cursor *cursor) {
+	if (!cursor) {
+		return;
+	}
+
+	wlr_xcursor_manager_destroy(cursor->xcursor_manager);
+	wlr_cursor_destroy(cursor->cursor);
+	free(cursor);
+}
+
+struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
+	struct sway_cursor *cursor = calloc(1, sizeof(struct sway_cursor));
+	if (!sway_assert(cursor, "could not allocate sway cursor")) {
+		return NULL;
+	}
+
+	struct wlr_cursor *wlr_cursor = wlr_cursor_create();
+	if (!sway_assert(wlr_cursor, "could not allocate wlr cursor")) {
+		free(cursor);
+		return NULL;
+	}
+
+	cursor->seat = seat;
+	wlr_cursor_attach_output_layout(wlr_cursor,
+		root_container.sway_root->output_layout);
+
+	// input events
+	wl_signal_add(&wlr_cursor->events.motion, &cursor->motion);
+	cursor->motion.notify = handle_cursor_motion;
+
+	wl_signal_add(&wlr_cursor->events.motion_absolute,
+		&cursor->motion_absolute);
+	cursor->motion_absolute.notify = handle_cursor_motion_absolute;
+
+	wl_signal_add(&wlr_cursor->events.button, &cursor->button);
+	cursor->button.notify = handle_cursor_button;
+
+	wl_signal_add(&wlr_cursor->events.axis, &cursor->axis);
+	cursor->axis.notify = handle_cursor_axis;
+
+	wl_signal_add(&wlr_cursor->events.touch_down, &cursor->touch_down);
+	cursor->touch_down.notify = handle_touch_down;
+
+	wl_signal_add(&wlr_cursor->events.touch_up, &cursor->touch_up);
+	cursor->touch_up.notify = handle_touch_up;
+
+	wl_signal_add(&wlr_cursor->events.touch_motion,
+		&cursor->touch_motion);
+	cursor->touch_motion.notify = handle_touch_motion;
+
+	// TODO: tablet protocol support
+	// Note: We should emulate pointer events for clients that don't support the
+	// tablet protocol when the time comes
+	wl_signal_add(&wlr_cursor->events.tablet_tool_axis,
+		&cursor->tool_axis);
+	cursor->tool_axis.notify = handle_tool_axis;
+
+	wl_signal_add(&wlr_cursor->events.tablet_tool_tip, &cursor->tool_tip);
+	cursor->tool_tip.notify = handle_tool_tip;
+
+	wl_signal_add(&wlr_cursor->events.tablet_tool_button, &cursor->tool_button);
+	cursor->tool_button.notify = handle_tool_button;
+
+	wl_signal_add(&seat->wlr_seat->events.request_set_cursor,
+			&cursor->request_set_cursor);
+	cursor->request_set_cursor.notify = handle_request_set_cursor;
+
+	cursor->cursor = wlr_cursor;
+
+	return cursor;
+}