Update NanoUI to use the asset_cache system

Also move a bunch of folders around.

code/modules/client/asset_cache.dm

@@ -204,3 +204,39 @@ proc/getFilesSlow(var/client/client, var/list/files, var/register_asset = TRUE)
 	for(var/path in typesof(/datum/html_interface))
 		var/datum/html_interface/hi = new path()
 		hi.registerResources()
+
+/datum/asset/nanoui
+	var/list/common = list()
+
+	var/list/common_dirs = list(
+		"nano/styles/",
+		"nano/scripts/",
+		"nano/images/",
+		"nano/layouts/"
+	)
+	var/list/uncommon_dirs = list(
+		"nano/interfaces/"
+	)
+
+/datum/asset/nanoui/register()
+	// Crawl the directories to find files.
+	for (var/path in common_dirs)
+		var/list/filenames = flist(path)
+		for(var/filename in filenames)
+			if(copytext(filename, length(filename)) != "/") // Ignore directories.
+				if(fexists(path + filename))
+					common[filename] = fcopy_rsc(path + filename)
+					register_asset(filename, common[filename])
+	for (var/path in uncommon_dirs)
+		var/list/filenames = flist(path)
+		for(var/filename in filenames)
+			if(copytext(filename, length(filename)) != "/") // Ignore directories.
+				if(fexists(path + filename))
+					register_asset(filename, fcopy_rsc(path + filename))
+
+/datum/asset/nanoui/send(client, uncommon)
+	if(!islist(uncommon))
+		uncommon = list(uncommon)
+
+	send_asset_list(client, uncommon, FALSE)
+	send_asset_list(client, common, TRUE)

code/modules/client/client procs.dm

@@ -333,9 +333,5 @@ var/next_external_rsc = 0
 		'html/browser/playeroptions.css',
 		)
 	spawn (10)
-		//Send nanoui files to client
-		SSnano.send_resources(src)
-		
 		//Precache the client with all other assets slowly, so as to not block other browse() calls
 		getFilesSlow(src, asset_cache, register_asset = FALSE)
-