Ability to stack notifications on top of each other

src/api.lua

@@ -2,8 +2,8 @@ local http = ...
 local make_fs, get_inventory_fs = i3.files.gui()
 
 IMPORT("sorter", "sort_inventory", "play_sound")
-IMPORT("get_player_by_name", "add_hud_waypoint")
 IMPORT("sort", "concat", "copy", "insert", "remove")
+IMPORT("get_player_by_name", "add_hud_waypoint", "init_hud_notif")
 IMPORT("gmatch", "split", "S", "err", "fmt", "reg_items", "pos_to_str")
 IMPORT("true_str", "true_table", "is_str", "is_func", "is_table", "clean_name")
 
@@ -319,13 +319,29 @@ function i3.hud_notif(name, msg, img)
 		return err "i3.hud_notif: no player data initialized"
 	end
 
-	data.show_hud = true
+	local player = get_player_by_name(name)
-	data.hud_msg = msg
+	local max_y = -120
 
+	local def = {
+		show = true,
+		max_y = max_y,
+		hud_msg = msg,
+		hud_img = img and fmt("%s^[resize:64x64", img) or nil,
+		hud_timer = 0,
+		elems = init_hud_notif(player),
+	}
+
+	insert(data.hud.notifs, def)
 	play_sound(name, "i3_achievement", 1.0)
 
-	if img then
+	local nb_notifs = #data.hud.notifs
-		data.hud_img = fmt("%s^[resize:64x64", img)
+	for i = 1, nb_notifs - 1 do
+		local notif = data.hud.notifs[i]
+		if notif then
+			notif.show = true
+			notif.max_y = ((nb_notifs - i) + 1) * max_y
+			notif.hud_timer = 0
+		end
 	end
 end
 

src/common.lua

@@ -636,6 +636,41 @@ local function add_hud_waypoint(player, name, pos, color, image)
 	}
 end
 
+local function init_hud_notif(player)
+	return {
+		bg = player:hud_add {
+			hud_elem_type = "image",
+			position      = {x = 1,    y = 1},
+			offset        = {x = -330, y = 0},
+			alignment     = {x = 1,    y = 1},
+			scale         = {x = 0.6,  y = 0.6},
+			text          = "i3_bg_notif.png",
+			z_index       = 0xDEAD,
+		},
+
+		img = player:hud_add {
+			hud_elem_type = "image",
+			position      = {x = 1,    y = 1},
+			offset        = {x = -320, y = 20},
+			alignment     = {x = 1,    y = 1},
+			scale         = {x = 1,    y = 1},
+			text          = "",
+			z_index       = 0xDEAD,
+		},
+
+		text = player:hud_add {
+			hud_elem_type = "text",
+			position      = {x = 1,    y = 1},
+			offset        = {x = -245, y = 40},
+			alignment     = {x = 1,    y = 1},
+			number        = 0xffffff,
+			text          = "",
+			z_index       = 0xDEAD,
+			style         = 1,
+		}
+	}
+end
+
 local function get_detached_inv(name, player_name)
 	return core.get_inventory {
 		type = "detached",
@@ -725,6 +760,7 @@ local _ = {
 	play_sound = play_sound,
 	reset_data = reset_data,
 	safe_teleport = safe_teleport,
+	init_hud_notif = init_hud_notif,
 	add_hud_waypoint = add_hud_waypoint,
 
 	-- Core functions

src/hud.lua

@@ -1,4 +1,5 @@
-IMPORT("ceil", "get_connected_players", "str_to_pos", "add_hud_waypoint")
+IMPORT("ceil", "remove", "str_to_pos")
+IMPORT("get_connected_players", "add_hud_waypoint")
 
 local function init_hud(player)
 	local name = player:get_player_name()
@@ -13,36 +14,7 @@ local function init_hud(player)
 	end
 
 	data.hud = {
-		bg = player:hud_add {
+		notifs = {},
-			hud_elem_type = "image",
-			position      = {x = 1,    y = 1},
-			offset        = {x = -330, y = 0},
-			alignment     = {x = 1,    y = 1},
-			scale         = {x = 0.6,  y = 0.6},
-			text          = "i3_bg_notif.png",
-			z_index       = 0xDEAD,
-		},
-
-		img = player:hud_add {
-			hud_elem_type = "image",
-			position      = {x = 1,    y = 1},
-			offset        = {x = -320, y = 20},
-			alignment     = {x = 1,    y = 1},
-			scale         = {x = 1,    y = 1},
-			text          = "",
-			z_index       = 0xDEAD,
-		},
-
-		text = player:hud_add {
-			hud_elem_type = "text",
-			position      = {x = 1,    y = 1},
-			offset        = {x = -245, y = 40},
-			alignment     = {x = 1,    y = 1},
-			number        = 0xffffff,
-			text          = "",
-			z_index       = 0xDEAD,
-			style         = 1,
-		},
 
 		wielditem = player:hud_add {
 			hud_elem_type = "text",
@@ -53,33 +25,31 @@ local function init_hud(player)
 			text          = "",
 			z_index       = 0xDEAD,
 			style         = 1,
-		},
+		}
 	}
 end
 
-local function show_hud(player, data, dt)
+local function show_hud(player, data, notif, idx, dt)
-	local hud_info_bg = player:hud_get(data.hud.bg)
+	local hud_info_bg = player:hud_get(notif.elems.bg)
 	local offset_y = hud_info_bg.offset.y
 
-	local max_y = -120
+	local progress = offset_y * (1 / (notif.max_y - 5))
-	local progress = offset_y * (1 / (max_y - 5))
 	      progress = 1 - (progress ^ 4)
 	local speed = i3.settings.hud_speed * (100 * progress) * dt
 
-	if offset_y < max_y then
+	if offset_y < notif.max_y then
-		data.show_hud = false
+		notif.show = false
-		data.hud_timer = (data.hud_timer or 0) + dt
+		notif.hud_timer = notif.hud_timer + dt
 	end
 
-	player:hud_change(data.hud.text, "text", data.hud_msg)
+	player:hud_change(notif.elems.text, "text", notif.hud_msg)
 
-	if data.hud_img then
+	if notif.hud_img then
-		player:hud_change(data.hud.img, "text", data.hud_img)
+		player:hud_change(notif.elems.img, "text", notif.hud_img)
 	end
 
-	if data.show_hud then
+	if notif.show then
-		for name, def in pairs(data.hud) do
+		for _, def in pairs(notif.elems) do
-			if name ~= "wielditem" then
 			local hud_info = player:hud_get(def)
 
 			player:hud_change(def, "offset", {
@@ -87,24 +57,19 @@ local function show_hud(player, data, dt)
 				y = hud_info.offset.y - speed
 			})
 		end
-		end
+	elseif notif.show == false and notif.hud_timer >= (i3.settings.hud_timer_max + (idx * 0.25)) then
-	elseif data.show_hud == false and data.hud_timer >= i3.settings.hud_timer_max then
+		for _, def in pairs(notif.elems) do
-		for name, def in pairs(data.hud) do
-			if name ~= "wielditem" then
 			local hud_info = player:hud_get(def)
 
 			player:hud_change(def, "offset", {
 				x = hud_info.offset.x,
 				y = hud_info.offset.y + speed
 			})
-			end
-		end
 
 			if offset_y > 0 then
-			data.show_hud  = nil
+				player:hud_remove(def)
-			data.hud_timer = nil
+				remove(data.hud.notifs, idx)
-			data.hud_msg   = nil
+			end
-			data.hud_img   = nil
 		end
 	end
 end
@@ -119,8 +84,10 @@ core.register_globalstep(function(dt)
 		local data = i3.data[name]
 		if not data then return end
 
-		if data.show_hud ~= nil then
+		for idx, notif in ipairs(data.hud.notifs) do
-			show_hud(player, data, dt)
+			if notif.show ~= nil then
+				show_hud(player, data, notif, idx, dt)
+			end
 		end
 
 		local has_text = player:hud_get(data.hud.wielditem).text ~= ""