Add getColour/setColour to the window api

src/main/java/dan200/computercraft/core/terminal/Terminal.java

@@ -25,7 +25,7 @@ public class Terminal
     private TextBuffer m_textColour[];
     private TextBuffer m_backgroundColour[];
 
-    private Palette m_palette;
+    private final Palette m_palette;
 
     private boolean m_changed;
 

src/main/java/dan200/computercraft/shared/util/Palette.java

@@ -82,8 +82,7 @@ public class Palette
     {
         if(i >= 0 && i < colours.length )
         {
-            Colour c = Colour.values()[ i ];
+            setColour( i, Colour.values()[ i ] );
-            colours[i] = new PaletteColour( c.getR(), c.getG(), c.getB() );
         }
     }
 

src/main/resources/assets/computercraft/lua/rom/apis/window

@@ -57,6 +57,7 @@ function create( parent, nX, nY, nWidth, nHeight, bStartVisible )
     local nTextColor = colors.white
     local nBackgroundColor = colors.black
     local tLines = {}
+    local tPalette = {}
     do
         local sEmptyText = sEmptySpaceLine
         local sEmptyTextColor = tEmptyColorLines[ nTextColor ]
@@ -68,6 +69,11 @@ function create( parent, nX, nY, nWidth, nHeight, bStartVisible )
                 backgroundColor = sEmptyBackgroundColor,
             }
         end
+
+        for i=0,15 do
+            local c = 2 ^ i
+            tPalette[c] = table.pack( parent.getColour( c ) )
+        end
     end
 
     -- Helper functions
@@ -88,6 +94,12 @@ function create( parent, nX, nY, nWidth, nHeight, bStartVisible )
         parent.setTextColor( nTextColor )
     end
 
+    local function updatePalette()
+        for k,v in pairs(tPalette) do
+            parent.setColour( k, table.unpack( v ) )
+        end
+    end
+    
     local function redrawLine( n )
         local tLine = tLines[ n ]
         parent.setCursorPos( nX, nY + n - 1 )
@@ -276,6 +288,21 @@ function create( parent, nX, nY, nWidth, nHeight, bStartVisible )
         setTextColor( color )
     end
 
+    function window.setColour( colour, r, g, b )
+        local tCol = tPalette[ colour ]
+        tCol[1] = r
+        tCol[2] = g
+        tCol[3] = b
+    end
+
+    window.setColor = window.setColour
+
+    function window.getColour( colour )
+        return table.unpack( tPalette[ colour ] )
+    end
+
+    window.getColor = window.getColour
+
     local function setBackgroundColor( color )
         if not parent.isColor() then
             if color ~= colors.white and color ~= colors.black and color ~= colors.gray and color ~= colors.lightGray then