seat_cmd_cursor: utilize mouse button helpers

This modifies `seat_cmd_cursor` to utilize `get_mouse_button` when
parsing mouse buttons for the `press` and `release` operations. All x11
buttons, button event names, and button event codes are supported.
For x11 axis buttons, `dispatch_cursor_axis` is used instead of
`dispatch_cursor_button`. However the `press`/`release` state is ignored
and the either axis event is processed. This also removes support for
`left` and `right` in favor of `BTN_LEFT` and `BTN_RIGHT`.

4 files changed, 51 insertions, 23 deletions

diff --git a/sway/commands/seat/cursor.c b/sway/commands/seat/cursor.c
index 1fbc68a1..8d9e426a 100644
--- a/sway/commands/seat/cursor.c
+++ b/sway/commands/seat/cursor.c
@@ -3,6 +3,7 @@
 
 #include <strings.h>
 #include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_pointer.h>
 #include "sway/commands.h"
 #include "sway/input/cursor.h"
 
@@ -11,7 +12,7 @@ static struct cmd_results *press_or_release(struct sway_cursor *cursor,
 
 static const char *expected_syntax = "Expected 'cursor <move> <x> <y>' or "
                                         "'cursor <set> <x> <y>' or "
-                                        "'curor <press|release> <left|right|1|2|3...>'";
+                                        "'curor <press|release> <button[1-9]|event-name-or-code>'";
 
 static struct cmd_results *handle_command(struct sway_cursor *cursor,
                 int argc, char **argv) {
@@ -91,15 +92,35 @@ static struct cmd_results *press_or_release(struct sway_cursor *cursor,
                 return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);
         }
 
-        if (strcasecmp(button_str, "left") == 0) {
-                button = BTN_LEFT;
-        } else if (strcasecmp(button_str, "right") == 0) {
-                button = BTN_RIGHT;
-        } else {
-                button = strtol(button_str, NULL, 10);
-                if (button == 0) {
-                        return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);
-                }
+        char *message = NULL;
+        button = get_mouse_button(button_str, &message);
+        if (message) {
+                struct cmd_results *error =
+                        cmd_results_new(CMD_INVALID, "cursor", message);
+                free(message);
+                return error;
+        } else if (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN
+                        || button == SWAY_SCROLL_LEFT || button == SWAY_SCROLL_RIGHT) {
+                // Dispatch axis event
+                enum wlr_axis_orientation orientation =
+                        (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN)
+                        ? WLR_AXIS_ORIENTATION_VERTICAL
+                        : WLR_AXIS_ORIENTATION_HORIZONTAL;
+                double delta = (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_LEFT)
+                        ? -1 : 1;
+                struct wlr_event_pointer_axis event = {
+                        .device = NULL,
+                        .time_msec = 0,
+                        .source = WLR_AXIS_SOURCE_WHEEL,
+                        .orientation = orientation,
+                        .delta = delta * 15,
+                        .delta_discrete = delta
+                };
+                dispatch_cursor_axis(cursor, &event);
+                return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+        } else if (!button) {
+                return cmd_results_new(CMD_INVALID, "curor",
+                                "Unknown button %s", button_str);
         }
         dispatch_cursor_button(cursor, NULL, 0, button, state);
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 9af7ef57..c1c8b6bf 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -1082,11 +1082,13 @@ static uint32_t wl_axis_to_button(struct wlr_event_pointer_axis *event) {
         }
 }
 
-static void dispatch_cursor_axis(struct sway_cursor *cursor,
+void dispatch_cursor_axis(struct sway_cursor *cursor,
                 struct wlr_event_pointer_axis *event) {
         struct sway_seat *seat = cursor->seat;
-        struct sway_input_device *input_device = event->device->data;
-        struct input_config *ic = input_device_get_config(input_device);
+        struct sway_input_device *input_device =
+                event->device ? event->device->data : NULL;
+        struct input_config *ic =
+                input_device ? input_device_get_config(input_device) : NULL;
 
         // Determine what's under the cursor
         struct wlr_surface *surface = NULL;
@@ -1109,7 +1111,8 @@ static void dispatch_cursor_axis(struct sway_cursor *cursor,
         // Gather information needed for mouse bindings
         struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->wlr_seat);
         uint32_t modifiers = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
-        struct wlr_input_device *device = input_device->wlr_device;
+        struct wlr_input_device *device =
+                input_device ? input_device->wlr_device : NULL;
         char *dev_id = device ? input_device_get_identifier(device) : strdup("*");
         uint32_t button = wl_axis_to_button(event);
 
diff --git a/sway/sway-input.5.scd b/sway/sway-input.5.scd
index 820194a9..044057f2 100644
--- a/sway/sway-input.5.scd
+++ b/sway/sway-input.5.scd
@@ -141,6 +141,19 @@ in their own "seat").
         Attach an input device to this seat by its input identifier. A special
         value of "\*" will attach all devices to the seat.
 
+*seat* <seat> cursor move|set <x> <y>
+        Move specified seat's cursor relative to current position or wrap to
+        absolute coordinates (with respect to the global coordinate space).
+        Specifying either value as 0 will not update that coordinate.
+
+*seat* <seat> cursor press|release button[1-9]|<event-name-or-code>
+        Simulate pressing (or releasing) the specified mouse button on the
+        specified seat. The button can either be provided as a button event name or
+        event code, which can be obtained from `libinput debug-events`, or as an x11
+        mouse button (button[1-9]). If using button[4-7], which map to axes, an axis
+        event will be simulated, however _press_ and _release_ will be ignored and
+        both will occur.
+
 *seat* <name> fallback true|false
         Set this seat as the fallback seat. A fallback seat will attach any device
         not explicitly attached to another seat (similar to a "default" seat).
diff --git a/sway/sway.5.scd b/sway/sway.5.scd
index 3398ad58..a9f60c1b 100644
--- a/sway/sway.5.scd
+++ b/sway/sway.5.scd
@@ -491,15 +491,6 @@ The default colors are:
 *seat* <seat> <seat-subcommands...>
         For details on seat subcommands, see *sway-input*(5).
 
-*seat* <seat> cursor move|set <x> <y>
-        Move specified seat's cursor relative to current position or wrap to
-        absolute coordinates (with respect to the global coordinate space).
-        Specifying either value as 0 will not update that coordinate.
-
-*seat* <seat> cursor press|release left|right|1|2|3...
-        Simulate pressing (or releasing) the specified mouse button on the
-        specified seat.
-
 *kill*
         Kills (closes) the currently focused container and all of its children.