3 files changed, 45 insertions, 0 deletions
diff --git a/include/sway/config.h b/include/sway/config.h
index be29082e..d07a71df 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -356,6 +356,7 @@ struct sway_config {
 		struct input_config *input_config;
 		struct seat_config *seat_config;
 		struct sway_seat *seat;
+		swayc_t *current_container;
 	} handler_context;
 };
 
diff --git a/include/sway/container.h b/include/sway/container.h
index 9a5e312b..a99e2694 100644
--- a/include/sway/container.h
+++ b/include/sway/container.h
@@ -145,4 +145,6 @@ swayc_t *swayc_parent_by_type(swayc_t *container, enum swayc_types type);
 swayc_t *swayc_at(swayc_t *parent, double lx, double ly,
 		struct wlr_surface **surface, double *sx, double *sy);
 
+void container_map(swayc_t *container, void (*f)(swayc_t *view, void *data), void *data);
+
 #endif
diff --git a/include/sway/criteria.h b/include/sway/criteria.h
new file mode 100644
index 00000000..c5ed9857
--- /dev/null
+++ b/include/sway/criteria.h
@@ -0,0 +1,42 @@
+#ifndef _SWAY_CRITERIA_H
+#define _SWAY_CRITERIA_H
+
+#include "container.h"
+#include "list.h"
+
+/**
+ * Maps criteria (as a list of criteria tokens) to a command list.
+ *
+ * A list of tokens together represent a single criteria string (e.g.
+ * '[class="abc" title="xyz"]' becomes two criteria tokens).
+ *
+ * for_window: Views matching all criteria will have the bound command list
+ * executed on them.
+ *
+ * Set via `for_window <criteria> <cmd list>`.
+ */
+struct criteria {
+	list_t *tokens; // struct crit_token, contains compiled regex.
+	char *crit_raw; // entire criteria string (for logging)
+
+	char *cmdlist;
+};
+
+int criteria_cmp(const void *item, const void *data);
+void free_criteria(struct criteria *crit);
+
+// Pouplate list with crit_tokens extracted from criteria string, returns error
+// string or NULL if successful.
+char *extract_crit_tokens(list_t *tokens, const char *criteria);
+
+// Returns list of criteria that match given container. These criteria have
+// been set with `for_window` commands and have an associated cmdlist.
+list_t *criteria_for(swayc_t *cont);
+
+// Returns a list of all containers that match the given list of tokens.
+list_t *container_for(list_t *tokens);
+
+// Returns true if any criteria in the given list matches this container
+bool criteria_any(swayc_t *cont, list_t *criteria);
+
+#endif