Merge pull request #3341 from RedSoxFan/mouse-bindings-improved

Improve mouse button parsing: helpers and bind{code/sym}

1 files changed, 65 insertions, 0 deletions

diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 409e7b12..9af7ef57 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -2,8 +2,10 @@
 #include <math.h>
 #include <libevdev/libevdev.h>
 #include <linux/input-event-codes.h>
+#include <errno.h>
 #include <float.h>
 #include <limits.h>
+#include <strings.h>
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/types/wlr_idle.h>
@@ -1533,3 +1535,66 @@ void cursor_warp_to_workspace(struct sway_cursor *cursor,
 
         wlr_cursor_warp(cursor->cursor, NULL, x, y);
 }
+
+uint32_t get_mouse_bindsym(const char *name, char **error) {
+        if (strncasecmp(name, "button", strlen("button")) == 0) {
+                // Map to x11 mouse buttons
+                int number = name[strlen("button")] - '0';
+                if (number < 1 || number > 9 || strlen(name) > strlen("button0")) {
+                        *error = strdup("Only buttons 1-9 are supported. For other mouse "
+                                        "buttons, use the name of the event code.");
+                        return 0;
+                }
+                static const uint32_t buttons[] = {BTN_LEFT, BTN_MIDDLE, BTN_RIGHT,
+                        SWAY_SCROLL_UP, SWAY_SCROLL_DOWN, SWAY_SCROLL_LEFT,
+                        SWAY_SCROLL_RIGHT, BTN_SIDE, BTN_EXTRA};
+                return buttons[number - 1];
+        } else if (strncmp(name, "BTN_", strlen("BTN_")) == 0) {
+                // Get event code from name
+                int code = libevdev_event_code_from_name(EV_KEY, name);
+                if (code == -1) {
+                        size_t len = snprintf(NULL, 0, "Unknown event %s", name) + 1;
+                        *error = malloc(len);
+                        if (*error) {
+                                snprintf(*error, len, "Unknown event %s", name);
+                        }
+                        return 0;
+                }
+                return code;
+        }
+        return 0;
+}
+
+uint32_t get_mouse_bindcode(const char *name, char **error) {
+        // Validate event code
+        errno = 0;
+        char *endptr;
+        int code = strtol(name, &endptr, 10);
+        if (endptr == name && code <= 0) {
+                *error = strdup("Button event code must be a positive integer.");
+                return 0;
+        } else if (errno == ERANGE) {
+                *error = strdup("Button event code out of range.");
+                return 0;
+        }
+        const char *event = libevdev_event_code_get_name(EV_KEY, code);
+        if (!event || strncmp(event, "BTN_", strlen("BTN_")) != 0) {
+                size_t len = snprintf(NULL, 0, "Event code %d (%s) is not a button",
+                                code, event) + 1;
+                *error = malloc(len);
+                if (*error) {
+                        snprintf(*error, len, "Event code %d (%s) is not a button",
+                                        code, event);
+                }
+                return 0;
+        }
+        return code;
+}
+
+uint32_t get_mouse_button(const char *name, char **error) {
+        uint32_t button = get_mouse_bindsym(name, error);
+        if (!button && !error) {
+                button = get_mouse_bindcode(name, error);
+        }
+        return button;
+}