More efficient display algorithms

displayBuffer now only kills lines after a replacement has been
outputted. An expermiental procedure displayBufferSwapOutput was also
added, it isn't currently used as it's best for small changes like link
highlighting.

2 files changed, 13 insertions, 1 deletions

diff --git a/src/types/color.nim b/src/types/color.nim
index 2a956baa..45a3f31d 100644
--- a/src/types/color.nim
+++ b/src/types/color.nim
@@ -4,6 +4,15 @@ type
   CellColor* = object
     case rgb*: bool
     of true:
-      rgbcolor: RGBColor
+      rgbcolor*: RGBColor
     of false:
       color*: uint8
+
+func `==`*(color1: CellColor, color2: CellColor): bool =
+  if color1.rgb != color2.rgb:
+    return false
+  if color1.rgb:
+    return color1.rgbcolor == color2.rgbcolor
+  return color1.color == color2.color
+
+const defaultColor* = CellColor(rgb: false, color: 0)
diff --git a/src/types/enums.nim b/src/types/enums.nim
index 6b2c7412..eac71dd5 100644
--- a/src/types/enums.nim
+++ b/src/types/enums.nim
@@ -78,6 +78,9 @@ type
   CSSGlobalValueType* = enum
     VALUE_INITIAL, VALUE_INHERIT, VALUE_REVERT, VALUE_UNSET
 
+  DrawInstructionType* = enum
+    DRAW_TEXT, DRAW_GOTO, DRAW_FGCOLOR, DRAW_BGCOLOR, DRAW_STYLE, DRAW_RESET
+
 const SelfClosingTagTypes* = {
   TAG_LI, TAG_P
 }