Merge pull request #2874 from ianyfan/swaybar

swaybar: separate input code to new file

1 files changed, 286 insertions, 0 deletions

diff --git a/swaybar/input.c b/swaybar/input.c
new file mode 100644
index 00000000..31137f44
--- /dev/null
+++ b/swaybar/input.c
@@ -0,0 +1,286 @@
+#include <assert.h>
+#ifdef __FreeBSD__
+#include <dev/evdev/input-event-codes.h>
+#else
+#include <linux/input-event-codes.h>
+#endif
+#include <wayland-client.h>
+#include <wayland-cursor.h>
+#include <wlr/util/log.h>
+#include "list.h"
+#include "log.h"
+#include "swaybar/bar.h"
+#include "swaybar/config.h"
+#include "swaybar/input.h"
+#include "swaybar/ipc.h"
+
+void free_hotspots(struct wl_list *list) {
+	struct swaybar_hotspot *hotspot, *tmp;
+	wl_list_for_each_safe(hotspot, tmp, list, link) {
+		wl_list_remove(&hotspot->link);
+		if (hotspot->destroy) {
+			hotspot->destroy(hotspot->data);
+		}
+		free(hotspot);
+	}
+}
+
+static enum x11_button wl_button_to_x11_button(uint32_t button) {
+	switch (button) {
+	case BTN_LEFT:
+		return LEFT;
+	case BTN_MIDDLE:
+		return MIDDLE;
+	case BTN_RIGHT:
+		return RIGHT;
+	case BTN_SIDE:
+		return BACK;
+	case BTN_EXTRA:
+		return FORWARD;
+	default:
+		return NONE;
+	}
+}
+
+static enum x11_button wl_axis_to_x11_button(uint32_t axis, wl_fixed_t value) {
+	switch (axis) {
+	case WL_POINTER_AXIS_VERTICAL_SCROLL:
+		return wl_fixed_to_double(value) < 0 ? SCROLL_UP : SCROLL_DOWN;
+	case WL_POINTER_AXIS_HORIZONTAL_SCROLL:
+		return wl_fixed_to_double(value) < 0 ? SCROLL_LEFT : SCROLL_RIGHT;
+	default:
+		wlr_log(WLR_DEBUG, "Unexpected axis value on mouse scroll");
+		return NONE;
+	}
+}
+
+static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, struct wl_surface *surface,
+		wl_fixed_t surface_x, wl_fixed_t surface_y) {
+	struct swaybar *bar = data;
+	struct swaybar_pointer *pointer = &bar->pointer;
+	struct swaybar_output *output;
+	wl_list_for_each(output, &bar->outputs, link) {
+		if (output->surface == surface) {
+			pointer->current = output;
+			break;
+		}
+	}
+	int max_scale = 1;
+	struct swaybar_output *_output;
+	wl_list_for_each(_output, &bar->outputs, link) {
+		if (_output->scale > max_scale) {
+			max_scale = _output->scale;
+		}
+	}
+	wl_surface_set_buffer_scale(pointer->cursor_surface, max_scale);
+	wl_surface_attach(pointer->cursor_surface,
+			wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
+	wl_pointer_set_cursor(wl_pointer, serial, pointer->cursor_surface,
+			pointer->cursor_image->hotspot_x / max_scale,
+			pointer->cursor_image->hotspot_y / max_scale);
+	wl_surface_commit(pointer->cursor_surface);
+}
+
+static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, struct wl_surface *surface) {
+	struct swaybar *bar = data;
+	bar->pointer.current = NULL;
+}
+
+static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
+	struct swaybar *bar = data;
+	bar->pointer.x = wl_fixed_to_int(surface_x);
+	bar->pointer.y = wl_fixed_to_int(surface_y);
+}
+
+static bool check_bindings(struct swaybar *bar, uint32_t x11_button,
+		uint32_t state) {
+	bool released = state == WL_POINTER_BUTTON_STATE_RELEASED;
+	for (int i = 0; i < bar->config->bindings->length; i++) {
+		struct swaybar_binding *binding = bar->config->bindings->items[i];
+		if (binding->button == x11_button && binding->release == released) {
+			ipc_execute_binding(bar, binding);
+			return true;
+		}
+	}
+	return false;
+}
+
+static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
+	struct swaybar *bar = data;
+	struct swaybar_pointer *pointer = &bar->pointer;
+	struct swaybar_output *output = pointer->current;
+	if (!sway_assert(output, "button with no active output")) {
+		return;
+	}
+
+	if (check_bindings(bar, wl_button_to_x11_button(button), state)) {
+		return;
+	}
+
+	if (state != WL_POINTER_BUTTON_STATE_PRESSED) {
+		return;
+	}
+	struct swaybar_hotspot *hotspot;
+	wl_list_for_each(hotspot, &output->hotspots, link) {
+		double x = pointer->x * output->scale;
+		double y = pointer->y * output->scale;
+		if (x >= hotspot->x
+				&& y >= hotspot->y
+				&& x < hotspot->x + hotspot->width
+				&& y < hotspot->y + hotspot->height) {
+			if (HOTSPOT_IGNORE == hotspot->callback(output, pointer->x, pointer->y,
+					wl_button_to_x11_button(button), hotspot->data)) {
+				return;
+			}
+		}
+	}
+}
+
+static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, uint32_t axis, wl_fixed_t value) {
+	struct swaybar *bar = data;
+	struct swaybar_pointer *pointer = &bar->pointer;
+	struct swaybar_output *output = pointer->current;
+	if (!sway_assert(output, "axis with no active output")) {
+		return;
+	}
+
+	// If there is a button press binding, execute it, skip default behavior,
+	// and check button release bindings
+	if (check_bindings(bar, wl_axis_to_x11_button(axis, value),
+			WL_POINTER_BUTTON_STATE_PRESSED)) {
+		check_bindings(bar, wl_axis_to_x11_button(axis, value),
+				WL_POINTER_BUTTON_STATE_RELEASED);
+		return;
+	}
+
+	struct swaybar_hotspot *hotspot;
+	wl_list_for_each(hotspot, &output->hotspots, link) {
+		double x = pointer->x * output->scale;
+		double y = pointer->y * output->scale;
+		if (x >= hotspot->x
+				&& y >= hotspot->y
+				&& x < hotspot->x + hotspot->width
+				&& y < hotspot->y + hotspot->height) {
+			if (HOTSPOT_IGNORE == hotspot->callback(
+					output, pointer->x, pointer->y,
+					wl_axis_to_x11_button(axis, value), hotspot->data)) {
+				return;
+			}
+		}
+	}
+
+	double amt = wl_fixed_to_double(value);
+	if (amt == 0.0) {
+		return;
+	}
+
+	// last doesn't actually need initialization,
+	// but gcc (7.3.1) is too dumb to figure it out
+	struct swaybar_workspace *first = NULL;
+	struct swaybar_workspace *active = NULL;
+	struct swaybar_workspace *last = NULL;
+
+	struct swaybar_workspace *iter;
+	wl_list_for_each(iter, &output->workspaces, link) {
+		if (!first) {
+			first = iter;
+		}
+
+		if (iter->visible) {
+			active = iter;
+		}
+
+		last = iter;
+	}
+
+	if (!sway_assert(active, "axis with null workspace")) {
+		return;
+	}
+
+	struct swaybar_workspace *new;
+
+	if (amt > 0.0) {
+		if (active == first) {
+			if (!bar->config->wrap_scroll) {
+				return;
+			}
+			new = last;
+		}
+
+		new = wl_container_of(active->link.prev, new, link);
+	} else {
+		if (active == last) {
+			if (!bar->config->wrap_scroll) {
+				return;
+			}
+			new = first;
+		}
+
+		new = wl_container_of(active->link.next, new, link);
+	}
+
+	ipc_send_workspace_command(bar, new->name);
+
+	// Check button release bindings
+	check_bindings(bar, wl_axis_to_x11_button(axis, value),
+			WL_POINTER_BUTTON_STATE_RELEASED);
+}
+
+static void wl_pointer_frame(void *data, struct wl_pointer *wl_pointer) {
+	// Who cares
+}
+
+static void wl_pointer_axis_source(void *data, struct wl_pointer *wl_pointer,
+		uint32_t axis_source) {
+	// Who cares
+}
+
+static void wl_pointer_axis_stop(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, uint32_t axis) {
+	// Who cares
+}
+
+static void wl_pointer_axis_discrete(void *data, struct wl_pointer *wl_pointer,
+		uint32_t axis, int32_t discrete) {
+	// Who cares
+}
+
+struct wl_pointer_listener pointer_listener = {
+	.enter = wl_pointer_enter,
+	.leave = wl_pointer_leave,
+	.motion = wl_pointer_motion,
+	.button = wl_pointer_button,
+	.axis = wl_pointer_axis,
+	.frame = wl_pointer_frame,
+	.axis_source = wl_pointer_axis_source,
+	.axis_stop = wl_pointer_axis_stop,
+	.axis_discrete = wl_pointer_axis_discrete,
+};
+
+static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
+		enum wl_seat_capability caps) {
+	struct swaybar *bar = data;
+	if (bar->pointer.pointer != NULL) {
+		wl_pointer_release(bar->pointer.pointer);
+		bar->pointer.pointer = NULL;
+	}
+	if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
+		bar->pointer.pointer = wl_seat_get_pointer(wl_seat);
+		wl_pointer_add_listener(bar->pointer.pointer, &pointer_listener, bar);
+	}
+}
+
+static void seat_handle_name(void *data, struct wl_seat *wl_seat,
+		const char *name) {
+	// Who cares
+}
+
+const struct wl_seat_listener seat_listener = {
+	.capabilities = seat_handle_capabilities,
+	.name = seat_handle_name,
+};