input_cmd_scroll_button: utilize mouse btn helpers

This modifies `input_cmd_scroll_button` to utilize the mouse button
helper `get_mouse_button` when parsing the button. x11 axis buttons are
not supported with this command and `CMD_INVALID` will be returned, but
all other x11 buttons, button event names, and button event codes should
be working

3 files changed, 24 insertions, 21 deletions

diff --git a/sway/commands/input/scroll_button.c b/sway/commands/input/scroll_button.c
index 1958f23c..d82a1fe1 100644
--- a/sway/commands/input/scroll_button.c
+++ b/sway/commands/input/scroll_button.c
@@ -1,9 +1,7 @@
-#include <string.h>
-#include <strings.h>
-#include <errno.h>
+#include <libevdev/libevdev.h>
 #include "sway/config.h"
 #include "sway/commands.h"
-#include "sway/input/input-manager.h"
+#include "sway/input/cursor.h"
 
 struct cmd_results *input_cmd_scroll_button(int argc, char **argv) {
         struct cmd_results *error = NULL;
@@ -16,22 +14,26 @@ struct cmd_results *input_cmd_scroll_button(int argc, char **argv) {
                         "No input device defined.");
         }
 
-        errno = 0;
-        char *endptr;
-        int scroll_button = strtol(*argv, &endptr, 10);
-        if (endptr == *argv && scroll_button == 0) {
-                return cmd_results_new(CMD_INVALID, "scroll_button",
-                                "Scroll button identifier must be an integer.");
+        if (strcmp(*argv, "disable") == 0) {
+                ic->scroll_button = 0;
+                return cmd_results_new(CMD_SUCCESS, NULL, NULL);
         }
-        if (errno == ERANGE) {
+
+        char *message = NULL;
+        uint32_t button = get_mouse_button(*argv, &message);
+        if (message) {
+                error = cmd_results_new(CMD_INVALID, "scroll_button", message);
+                free(message);
+                return error;
+        } else if (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN
+                        || button == SWAY_SCROLL_LEFT || button == SWAY_SCROLL_RIGHT) {
                 return cmd_results_new(CMD_INVALID, "scroll_button",
-                                "Scroll button identifier out of range.");
-        }
-        if (scroll_button < 0) {
+                                "X11 axis buttons are not supported for scroll_button");
+        } else if (!button) {
                 return cmd_results_new(CMD_INVALID, "scroll_button",
-                                "Scroll button identifier cannot be negative.");
+                                "Unknown button %s", *argv);
         }
-        ic->scroll_button = scroll_button;
+        ic->scroll_button = button;
 
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 9af7ef57..a69cccb4 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -1593,7 +1593,7 @@ uint32_t get_mouse_bindcode(const char *name, char **error) {
 
 uint32_t get_mouse_button(const char *name, char **error) {
         uint32_t button = get_mouse_bindsym(name, error);
-        if (!button && !error) {
+        if (!button && !*error) {
                 button = get_mouse_bindcode(name, error);
         }
         return button;
diff --git a/sway/sway-input.5.scd b/sway/sway-input.5.scd
index 820194a9..1b2255b8 100644
--- a/sway/sway-input.5.scd
+++ b/sway/sway-input.5.scd
@@ -105,10 +105,11 @@ The following commands may only be used in the configuration file.
 *input* <identifier> repeat\_rate <characters per second>
         Sets the frequency of key repeats once the repeat\_delay has passed.
 
-*input* <identifier> scroll\_button <button\_identifier>
-        Sets button used for scroll\_method on\_button\_down. The button identifier
-        can be obtained from `libinput debug-events`.
-        If set to 0, it disables the scroll\_button on\_button\_down.
+*input* <identifier> scroll\_button disable|button[1-3,8,9]|<event-code-or-name>
+        Sets the button used for scroll\_method on\_button\_down. The button can
+        be given as an event name or code, which can be obtained from `libinput
+        debug-events`, or as a x11 mouse button (button[1-3,8,9]). If set to
+        _disable_, it disables the scroll\_method on\_button\_down.
 
 *input* <identifier> scroll\_factor <floating point value>
         Changes the scroll factor for the specified input device. Scroll speed will