Implement multi-contains matching algorithm.

This allows a new matching method that will be the equivalent
of contains on every word (delimited by space) that is given.
This is the same matching algorithm used by helm in emacs and
allows a way of iteratively refining your search.

src/wofi.c

@@ -41,11 +41,13 @@
 #include <gdk/gdkwayland.h>
 
 #define PROTO_VERSION(v1, v2) (v1 < v2 ? v1 : v2)
+#define MAX_MULTI_CONTAINS_FILTER_SIZE 256
 
 static const char* terminals[] = {"kitty", "termite", "alacritty", "foot", "gnome-terminal", "weston-terminal"};
 
 enum matching_mode {
 	MATCHING_MODE_CONTAINS,
+	MATCHING_MODE_MULTI_CONTAINS,
 	MATCHING_MODE_FUZZY
 };
 
@@ -970,12 +972,7 @@ static void activate_search(GtkEntry* entry, gpointer data) {
 	}
 }
 
-static gboolean filter_proxy(GtkFlowBoxChild* row) {
+static gboolean do_strcomp(gchar* filter, const gchar* text) {
-	GtkWidget* box = gtk_bin_get_child(GTK_BIN(row));
-	if(GTK_IS_EXPANDER(box)) {
-		box = gtk_expander_get_label_widget(GTK_EXPANDER(box));
-	}
-	const gchar* text = wofi_property_box_get_property(WOFI_PROPERTY_BOX(box), "filter");
 	if(filter == NULL || strcmp(filter, "") == 0) {
 		return TRUE;
 	}
@@ -989,12 +986,51 @@ static gboolean filter_proxy(GtkFlowBoxChild* row) {
 	}
 }
 
-static gboolean do_filter(GtkFlowBoxChild* row, gpointer data) {
+static gboolean do_multi_strcomp(gchar* filter, const gchar* text) {
-	(void) data;
+	if(filter == NULL || strcmp(filter, "") == 0) {
-	gboolean ret = filter_proxy(row);
+		return TRUE;
+	}
+	if(text == NULL) {
+		return FALSE;
+	}
+	gchar new_filter[MAX_MULTI_CONTAINS_FILTER_SIZE];
+	strncpy(new_filter, filter, sizeof(new_filter));
+	new_filter[sizeof(new_filter) - 1] = '\0';
+	gchar* token;
+	gchar* rest = new_filter;
+	while((token = strtok_r(rest, " ", &rest))) {
+		if(do_strcomp(token, text) == FALSE) {
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
 
-	if(gtk_widget_get_visible(GTK_WIDGET(row)) == !ret && dynamic_lines) {
+static gboolean filter_proxy(GtkFlowBoxChild* row) {
-		if(ret) {
+	GtkWidget* box = gtk_bin_get_child(GTK_BIN(row));
+	if(GTK_IS_EXPANDER(box)) {
+		box = gtk_expander_get_label_widget(GTK_EXPANDER(box));
+	}
+	const gchar* text =
+			wofi_property_box_get_property(WOFI_PROPERTY_BOX(box), "filter");
+	return do_strcomp(filter, text);
+}
+
+static gboolean filter_multi_proxy(GtkFlowBoxChild* row) {
+	GtkWidget* box = gtk_bin_get_child(GTK_BIN(row));
+	if(GTK_IS_EXPANDER(box)) {
+		box = gtk_expander_get_label_widget(GTK_EXPANDER(box));
+	}
+	const gchar* text =
+			wofi_property_box_get_property(WOFI_PROPERTY_BOX(box), "filter");
+	return do_multi_strcomp(filter, text);
+}
+
+static void do_resize_surface_after_filter(GtkFlowBoxChild* row, gboolean filter_return) {
+
+	if (gtk_widget_get_visible(GTK_WIDGET(row)) == !filter_return &&
+			dynamic_lines) {
+		if (filter_return) {
 			++line_count;
 		} else {
 			--line_count;
@@ -1009,7 +1045,23 @@ static gboolean do_filter(GtkFlowBoxChild* row, gpointer data) {
 		}
 	}
 
-	gtk_widget_set_visible(GTK_WIDGET(row), ret);
+	gtk_widget_set_visible(GTK_WIDGET(row), filter_return);
+}
+
+static gboolean do_filter(GtkFlowBoxChild* row, gpointer data) {
+	(void) data;
+	gboolean ret = filter_proxy(row);
+
+	do_resize_surface_after_filter(row, ret);
+
+	return ret;
+}
+
+static gboolean do_multi_filter(GtkFlowBoxChild* row, gpointer data) {
+	(void)data;
+	gboolean ret = filter_multi_proxy(row);
+
+	do_resize_surface_after_filter(row, ret);
 
 	return ret;
 }
@@ -1053,6 +1105,54 @@ static gint fuzzy_sort(const gchar* text1, const gchar* text2) {
 	return dist1 - dist2;
 }
 
+// we sort based on how early in the string all the matches are.
+// if there are matches for each.
+static gint multi_contains_sort(const gchar* text1, const gchar* text2) {
+	// sum of string positions of each match
+	int t1_count = 0;
+	int t2_count = 0;
+	// does this string match with mult-contains
+	bool t1_match = true;
+	bool t2_match = true;
+
+	gchar new_filter[MAX_MULTI_CONTAINS_FILTER_SIZE];
+	strncpy(new_filter, filter, sizeof(new_filter));
+	new_filter[sizeof(new_filter) - 1] = '\0';
+
+	gchar* token;
+	gchar* rest = new_filter;
+	while((token = strtok_r(rest, " ", &rest))) {
+		char* str1, *str2;
+		if(insensitive) {
+			str1 = strcasestr(text1, token);
+			str2 = strcasestr(text2, token);
+		} else {
+			str1 = strstr(text1, token);
+			str2 = strstr(text2, token);
+		}
+		t1_match = t1_match && str1 != NULL;
+		t2_match = t2_match && str2 != NULL;
+		if(str1 != NULL) {
+			int pos1 = str1 - text1;
+			t1_count += pos1;
+		}
+		if(str2 != NULL) {
+			int pos2 = str2 - text2;
+			t2_count += pos2;
+		}
+	}
+	if(t1_match && t2_match) {
+		// both match
+		// return the one with the smallest count.
+		return t1_count - t2_count;
+	} else if(t1_match) {
+		return -1;
+	} else if(t2_match) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
 static gint contains_sort(const gchar* text1, const gchar* text2) {
 	char* str1, *str2;
 
@@ -1127,6 +1227,12 @@ static gint do_sort(GtkFlowBoxChild* child1, GtkFlowBoxChild* child2, gpointer d
 
 	gint primary = 0;
 	switch(matching) {
+	case MATCHING_MODE_MULTI_CONTAINS:
+		primary = multi_contains_sort(text1, text2);
+		if(primary == 0) {
+			return fallback;
+		}
+		return primary;
 	case MATCHING_MODE_CONTAINS:
 		primary = contains_sort(text1, text2);
 		if(primary == 0) {
@@ -1696,7 +1802,7 @@ void wofi_init(struct map* _config) {
 	char* password_char = map_get(config, "password_char");
 	exec_search = strcmp(config_get(config, "exec_search", "false"), "true") == 0;
 	bool hide_scroll = strcmp(config_get(config, "hide_scroll", "false"), "true") == 0;
-	matching = config_get_mnemonic(config, "matching", "contains", 2, "contains", "fuzzy");
+	matching = config_get_mnemonic(config, "matching", "contains", 3, "contains", "multi-contains", "fuzzy");
 	insensitive = strcmp(config_get(config, "insensitive", "false"), "true") == 0;
 	parse_search = strcmp(config_get(config, "parse_search", "false"), "true") == 0;
 	location = config_get_mnemonic(config, "location", "center", 18,
@@ -1895,6 +2001,10 @@ void wofi_init(struct map* _config) {
 	gtk_container_add(GTK_CONTAINER(scroll), wrapper_box);
 
 	switch(matching) {
+	case MATCHING_MODE_MULTI_CONTAINS:
+		gtk_flow_box_set_filter_func(GTK_FLOW_BOX(inner_box), do_multi_filter, NULL, NULL);
+		gtk_flow_box_set_sort_func(GTK_FLOW_BOX(inner_box), do_sort, NULL, NULL);
+		break;
 	case MATCHING_MODE_CONTAINS:
 		gtk_flow_box_set_filter_func(GTK_FLOW_BOX(inner_box), do_filter, NULL, NULL);
 		gtk_flow_box_set_sort_func(GTK_FLOW_BOX(inner_box), do_sort, NULL, NULL);