Added computer.bell() method to trigger the audible bell, automatically triggered when a string containing \a is processed by term.write(), closes #75.

Bumped version number.

build.properties

@@ -1,6 +1,6 @@
 minecraft.version=1.6.4
 forge.version=9.11.1.964
-oc.version=1.2.7
+oc.version=1.2.8
 ccl.version=1.0.0.62
 fmp.version=1.0.0.250
 maven.url=file:///var/www/users/fnuecke/maven.cil.li

src/main/resources/assets/opencomputers/lua/kernel.lua

@@ -394,6 +394,10 @@ local libcomputer = {
         return table.unpack(signal, 1, signal.n)
       end
     until computer.uptime() >= deadline
+  end,
+
+  bell = function()
+    libcomponent.invoke(computer.address(), "bell")
   end
 }
 

src/main/resources/assets/opencomputers/lua/rom/lib/term.lua

@@ -1,4 +1,5 @@
 local component = require("component")
+local computer = require("computer")
 local event = require("event")
 local keyboard = require("keyboard")
 local text = require("text")
@@ -331,6 +332,13 @@ function term.write(value, wrap)
   if unicode.len(value) == 0 then
     return
   end
+  do
+    local noBell = value:gsub("\a", "")
+    if #noBell ~= #value then
+      value = noBell
+      computer.bell()
+    end
+  end
   value = text.detab(value)
   local w, h = component.gpu.getResolution()
   if not w then

src/main/scala/li/cil/oc/server/component/machine/Machine.scala

@@ -277,6 +277,12 @@ class Machine(val owner: Owner, val rom: Option[ManagedEnvironment], constructor
   def isRunning(context: Context, args: Arguments): Array[AnyRef] =
     result(isRunning)
 
+  @Callback(doc = """function() -- Plays a tone, useful to alert users via audible feedback.""")
+  def bell(context: Context, args: Arguments): Array[AnyRef] = {
+    owner.world.playSoundEffect(owner.x + 0.5, owner.y + 0.5, owner.z + 0.5, "note.harp", 1, 1)
+    null
+  }
+
   // ----------------------------------------------------------------------- //
 
   override val canUpdate = true