Allow users to customize the cursor on clients

This also sets the default size to 16 and documents all of the other
environment variables in use in sway(1).

2 files changed, 49 insertions, 1 deletions

diff --git a/sway/sway.1.txt b/sway/sway.1.txt
index f62e27f4..0e503d2e 100644
--- a/sway/sway.1.txt
+++ b/sway/sway.1.txt
@@ -79,6 +79,44 @@ the location of your choosing and start there.
 
 For information on the config file format, see **sway**(5).
 
+Environment
+-----------
+
+The following environment variables have an effect on sway:
+
+*SWAY_CURSOR_THEME*::
+        Specifies the name of the cursor theme to use.
+
+*SWAY_CURSOR_SIZE*::
+        Specifies the size of the cursor to use.
+
+*SWAYSOCK*::
+        Specifies the path to the sway IPC socket.
+
+*WLC_DRM_DEVICE*::
+        Specifies the device to use in DRM mode.
+
+*WLC_SHM*::
+        Set 1 to force EGL clients to use shared memory.
+
+*WLC_OUTPUTS*::
+        Number of fake outputs to use when running in X11 mode.
+
+*WLC_XWAYLAND*::
+        Set to 0 to disable Xwayland support.
+
+*WLC_LIBINPUT*::
+        Set to 1 to force libinput (even in X11 mode).
+
+*WLC_REPEAT_DELAY*::
+        Configures the keyboard repeat delay.
+
+*WLC_REPEAT_RATE*::
+        Configures the keyboard repeat rate.
+
+*XKB_DEFAULT_LAYOUT*, *XKB_DEFAULT_VARIANT*, *XKB_DEFAULT_OPTIONS*::
+        Configures the xkb keyboard settings. See xkeyboard-config(7).
+
 Authors
 -------
 
diff --git a/wayland/window.c b/wayland/window.c
index 9bc0d4a2..3f48d39f 100644
--- a/wayland/window.c
+++ b/wayland/window.c
@@ -112,7 +112,17 @@ struct window *window_setup(struct registry *registry, uint32_t width, uint32_t
         get_next_buffer(window);
 
         if (registry->pointer) {
-                window->cursor.cursor_theme = wl_cursor_theme_load("default", 32, registry->shm); // TODO: let you customize this
+                char *cursor_theme = getenv("SWAY_CURSOR_THEME");
+                if (!cursor_theme) {
+                        cursor_theme = "default";
+                }
+                char *cursor_size = getenv("SWAY_CURSOR_SIZE");
+                if (!cursor_size) {
+                        cursor_size = "16";
+                }
+
+                window->cursor.cursor_theme = wl_cursor_theme_load(cursor_theme,
+                                atoi(cursor_size), registry->shm);
                 window->cursor.cursor = wl_cursor_theme_get_cursor(window->cursor.cursor_theme, "left_ptr");
                 window->cursor.surface = wl_compositor_create_surface(registry->compositor);