From 57118bc2528d83d1990849c9e397993cd006a18e Mon Sep 17 00:00:00 2001
From: Serhii Mozhaiskyi <sergei.mozhaisky@gmail.com>
Date: Fri, 13 Dec 2019 09:35:04 +0200
Subject: [PATCH] multiline RDS messages for transmitters

---
 rds.lua         | 27 ++++++++++++++-------------
 transmitter.lua | 24 ++++++++++++++++--------
 2 files changed, 30 insertions(+), 21 deletions(-)

diff --git a/rds.lua b/rds.lua
index d340ee4..07361fe 100644
--- a/rds.lua
+++ b/rds.lua
@@ -3,23 +3,24 @@ function ham_radio.get_rds_messages(frequency, is_receiver_station)
   local rds_messages = {}
   for position, transmitter in pairs(transmitters) do
     if transmitter.rds_message ~= "" and transmitter.rds_message ~= nil then
-      -- construct message
-      local message = table.concat({
-        '[ Radio | ',
-        transmitter.operated_by,
-        ' ] ',
-        transmitter.rds_message,
-      }, "")
-      if is_receiver_station then
-        message = table.concat({
-          '[ ',
+      for rds_message_line in transmitter.rds_message:gmatch("[^\n]+") do
+        -- construct message
+        local message = table.concat({
+          '[ Radio | ',
           transmitter.operated_by,
           ' ] ',
-          transmitter.rds_message
+          rds_message_line,
         }, "")
+        if is_receiver_station then
+          message = table.concat({
+            '[ ',
+            transmitter.operated_by,
+            ' ] ',
+            rds_message_line
+          }, "")
+        end
+        table.insert(rds_messages, message)
       end
-
-      table.insert(rds_messages, message)
     end
   end
   return rds_messages
diff --git a/transmitter.lua b/transmitter.lua
index 9f3ce77..f2aa2e2 100644
--- a/transmitter.lua
+++ b/transmitter.lua
@@ -13,8 +13,16 @@ ham_radio.transmitter_update_infotext = function(meta)
     'Frequency: ', frequency
   }
   if rds_message ~= "" then
+    local display_message = string.sub(
+      rds_message,
+      utf8.offset(rds_message,1),
+      utf8.offset(rds_message,60+1)-1
+    )
     table.insert(infotext, '\nRDS message: "')
-    table.insert(infotext, rds_message)
+    table.insert(infotext, display_message)
+    if display_message:len() < rds_message:len() then
+      table.insert(infotext, "...")
+    end
     table.insert(infotext, '"')
   end
   meta:set_string("infotext", table.concat(infotext, ''))
@@ -23,12 +31,12 @@ end
 minetest.register_node("ham_radio:transmitter", {
   description = "Radio Transmitter",
   tiles = {
-	  "ham_radio_transmitter_top.png",
-	  "ham_radio_transmitter_top.png",
-	  "ham_radio_transmitter_side.png",
-	  "ham_radio_transmitter_side.png",
-	  "ham_radio_transmitter_side.png",
-	  "ham_radio_transmitter_front.png"
+    "ham_radio_transmitter_top.png",
+    "ham_radio_transmitter_top.png",
+    "ham_radio_transmitter_side.png",
+    "ham_radio_transmitter_side.png",
+    "ham_radio_transmitter_side.png",
+    "ham_radio_transmitter_front.png"
   },
   groups = {cracky=2,oddly_breakable_by_hand=2},
   sounds = default.node_sound_metal_defaults(),
@@ -48,7 +56,7 @@ minetest.register_node("ham_radio:transmitter", {
         "tooltip[frequency;Integer number ",
           ham_radio.settings.frequency.min,"-",
           ham_radio.settings.frequency.max, "]",
-        "field[0.25,3.5;7,1;rds_message;RDS message;${rds_message}]",
+        "textarea[0.25,3.5;7,6;rds_message;RDS message;${rds_message}]",
         "button_exit[2,4.5;3,1;;Done]"
       },'')
     )