Refactor wlr_list inside wlroots

2 files changed, 43 insertions, 30 deletions

diff --git a/include/wlr/types/wlr_list.h b/include/wlr/types/wlr_list.h
index 8ddd30b6..78a30995 100644
--- a/include/wlr/types/wlr_list.h
+++ b/include/wlr/types/wlr_list.h
@@ -2,6 +2,7 @@
 #define WLR_UTIL_LIST_H
 
 #include <stddef.h>
+#include <stdbool.h>
 
 struct wlr_list {
 	size_t capacity;
@@ -10,51 +11,65 @@ struct wlr_list {
 };
 
 /**
- * Creates a new list, may return `NULL` on failure
+ * Initialize a list. Returns true on success, false on failure.
  */
-struct wlr_list *wlr_list_create(void);
-void wlr_list_free(struct wlr_list *list);
-void wlr_list_foreach(struct wlr_list *list, void (*callback)(void *item));
+bool wlr_list_init(struct wlr_list *list);
+
 /**
- * Add `item` to the end of a list.
- * Returns: new list length or `-1` on failure
+ * Deinitialize a list.
  */
-int wlr_list_add(struct wlr_list *list, void *item);
+void wlr_list_finish(struct wlr_list *list);
+
+/**
+ * Executes `callback` on each element in the list.
+ */
+void wlr_list_for_each(struct wlr_list *list, void (*callback)(void *item));
+
 /**
  * Add `item` to the end of a list.
- * Returns: new list length or `-1` on failure
+ * Returns: new list length or `-1` on failure.
  */
-int wlr_list_push(struct wlr_list *list, void *item);
+ssize_t wlr_list_push(struct wlr_list *list, void *item);
+
 /**
- * Place `item` into index `index` in the list
- * Returns: new list length or `-1` on failure
+ * Place `item` into index `index` in the list.
+ * Returns: new list length or `-1` on failure.
  */
-int wlr_list_insert(struct wlr_list *list, size_t index, void *item);
+ssize_t wlr_list_insert(struct wlr_list *list, size_t index, void *item);
+
 /**
- * Remove an item from the list
+ * Remove an item from the list.
  */
 void wlr_list_del(struct wlr_list *list, size_t index);
+
 /**
- * Remove and return an item from the end of the list
+ * Remove and return an item from the end of the list.
  */
 void *wlr_list_pop(struct wlr_list *list);
+
 /**
- * Get a reference to the last item of a list without removal
+ * Get a reference to the last item of a list without removal.
  */
 void *wlr_list_peek(struct wlr_list *list);
+
+/**
+ * Append each item in `source` to `list`.
+ * Does not modify `source`.
+ * Returns: new list length or `-1` on failure.
+ */
+ssize_t wlr_list_cat(struct wlr_list *list, const struct wlr_list *source);
+
 /**
- * Append each item in `source` to `list`
- * Does not modify `source`
- * Returns: new list length or `-1` on failure
- */
-int wlr_list_cat(struct wlr_list *list, struct wlr_list *source);
-// See qsort. Remember to use *_qsort functions as compare functions,
-// because they dereference the left and right arguments first!
-void wlr_list_qsort(struct wlr_list *list, int compare(const void *left, const void *right));
-// Return index for first item in list that returns 0 for given compare
-// function or -1 if none matches.
-int wlr_list_seq_find(struct wlr_list *list,
-		int compare(const void *item, const void *cmp_to),
-		const void *cmp_to);
+ * Sort a list using `qsort`.
+ */
+void wlr_list_qsort(struct wlr_list *list,
+	int compare(const void *left, const void *right));
+
+/**
+ * Return the index of the first item in the list that returns 0 for the given
+ * `compare` function, or -1 if none matches.
+ */
+ssize_t wlr_list_find(struct wlr_list *list,
+	int compare(const void *item, const void *cmp_to), const void *cmp_to);
 
 #endif
diff --git a/include/wlr/xwayland.h b/include/wlr/xwayland.h
index 6518b703..9b493d88 100644
--- a/include/wlr/xwayland.h
+++ b/include/wlr/xwayland.h
@@ -5,7 +5,6 @@
 #include <stdbool.h>
 #include <wlr/types/wlr_compositor.h>
 #include <xcb/xcb.h>
-#include <wlr/types/wlr_list.h>
 
 #ifdef HAS_XCB_ICCCM
 	#include <xcb/xcb_icccm.h>
@@ -86,7 +85,6 @@ struct wlr_xwayland_surface {
 	char *class;
 	char *instance;
 	struct wlr_xwayland_surface *parent;
-	struct wlr_list *state; // list of xcb_atom_t
 	pid_t pid;
 
 	xcb_atom_t *window_type;