Merge pull request #739 from deklov/swaybar-pointer-01

Enable windows to register to get notified of pointer button events

3 files changed, 70 insertions, 25 deletions

diff --git a/include/client/window.h b/include/client/window.h
index e48ec4f3..7be4fff3 100644
--- a/include/client/window.h
+++ b/include/client/window.h
@@ -9,33 +9,43 @@
 #include "list.h"
 #include "client/registry.h"
 
+struct window;
+
 struct buffer {
-        struct wl_buffer *buffer;
-        cairo_surface_t *surface;
-        cairo_t *cairo;
-        PangoContext *pango;
-        uint32_t width, height;
-        bool busy;
+        struct wl_buffer *buffer;
+        cairo_surface_t *surface;
+        cairo_t *cairo;
+        PangoContext *pango;
+        uint32_t width, height;
+        bool busy;
 };
 
 struct cursor {
-        struct wl_surface *surface;
-        struct wl_cursor_theme *cursor_theme;
-        struct wl_cursor *cursor;
-        struct wl_poitner *pointer;
+        struct wl_surface *surface;
+        struct wl_cursor_theme *cursor_theme;
+        struct wl_cursor *cursor;
+        struct wl_poitner *pointer;
+};
+
+struct pointer_input {
+        wl_fixed_t last_x;
+        wl_fixed_t last_y;
+
+        void (*notify)(struct window *window, wl_fixed_t x, wl_fixed_t y, uint32_t button);
 };
 
 struct window {
-        struct registry *registry;
-        struct buffer buffers[2];
-        struct buffer *buffer;
-        struct wl_surface *surface;
-        struct wl_shell_surface *shell_surface;
-        struct wl_callback *frame_cb;
-        struct cursor cursor;
-        uint32_t width, height;
-        char *font;
-        cairo_t *cairo;
+        struct registry *registry;
+        struct buffer buffers[2];
+        struct buffer *buffer;
+        struct wl_surface *surface;
+        struct wl_shell_surface *shell_surface;
+        struct wl_callback *frame_cb;
+        struct cursor cursor;
+        uint32_t width, height;
+        char *font;
+        cairo_t *cairo;
+        struct pointer_input pointer_input;
 };
 
 struct window *window_setup(struct registry *registry, uint32_t width, uint32_t height, bool shell_surface);
diff --git a/wayland/registry.c b/wayland/registry.c
index 46814bb7..622571f0 100644
--- a/wayland/registry.c
+++ b/wayland/registry.c
@@ -174,6 +174,35 @@ static const struct wl_keyboard_listener keyboard_listener = {
         .repeat_info = keyboard_handle_repeat_info
 };
 
+static void seat_handle_capabilities(void *data, struct wl_seat *seat,
+                enum wl_seat_capability caps) {
+        struct registry *reg = data;
+
+        if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !reg->pointer) {
+                reg->pointer = wl_seat_get_pointer(reg->seat);
+        } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && reg->pointer) {
+                wl_pointer_destroy(reg->pointer);
+                reg->pointer = NULL;
+        }
+
+        if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !reg->keyboard) {
+                reg->keyboard = wl_seat_get_keyboard(reg->seat);
+                wl_keyboard_add_listener(reg->keyboard, &keyboard_listener, reg);
+        } else if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && reg->keyboard) {
+                wl_keyboard_destroy(reg->keyboard);
+                reg->keyboard = NULL;
+        }
+}
+
+static void seat_handle_name(void *data, struct wl_seat *seat, const char *name) {
+        // this space intentionally left blank
+}
+
+static const struct wl_seat_listener seat_listener = {
+        .capabilities = seat_handle_capabilities,
+        .name = seat_handle_name,
+};
+
 static void registry_global(void *data, struct wl_registry *registry,
                 uint32_t name, const char *interface, uint32_t version) {
         struct registry *reg = data;
@@ -186,11 +215,7 @@ static void registry_global(void *data, struct wl_registry *registry,
                 reg->shell = wl_registry_bind(registry, name, &wl_shell_interface, version);
         } else if (strcmp(interface, wl_seat_interface.name) == 0) {
                 reg->seat = wl_registry_bind(registry, name, &wl_seat_interface, version);
-                reg->pointer = wl_seat_get_pointer(reg->seat);
-                reg->keyboard = wl_seat_get_keyboard(reg->seat);
-                if (reg->keyboard) {
-                        wl_keyboard_add_listener(reg->keyboard, &keyboard_listener, reg);
-                }
+                wl_seat_add_listener(reg->seat, &seat_listener, reg);
         } else if (strcmp(interface, wl_output_interface.name) == 0) {
                 struct wl_output *output = wl_registry_bind(registry, name, &wl_output_interface, version);
                 struct output_state *ostate = malloc(sizeof(struct output_state));
diff --git a/wayland/window.c b/wayland/window.c
index 7ca9e4ec..e055e244 100644
--- a/wayland/window.c
+++ b/wayland/window.c
@@ -30,10 +30,20 @@ static void pointer_handle_leave(void *data, struct wl_pointer *pointer,
 
 static void pointer_handle_motion(void *data, struct wl_pointer *pointer,
                       uint32_t time, wl_fixed_t sx_w, wl_fixed_t sy_w) {
+        struct window *window = data;
+
+        window->pointer_input.last_x = sx_w;
+        window->pointer_input.last_y = sy_w;
 }
 
 static void pointer_handle_button(void *data, struct wl_pointer *pointer, uint32_t serial,
                       uint32_t time, uint32_t button, uint32_t state_w) {
+        struct window *window = data;
+        struct pointer_input *input = &window->pointer_input;
+
+        if (window->pointer_input.notify) {
+                window->pointer_input.notify(window, input->last_x, input->last_y, button);
+        }
 }
 
 static void pointer_handle_axis(void *data, struct wl_pointer *pointer,