aks: refactor prompt color names & generation into separate file

prompt-colors.sh

@@ -0,0 +1,82 @@
+# prompt-colors.sh
+#
+# source this file to get color definitions
+# if $debug or $verbose is set, the definitions
+# are also printed to STDERR.
+
+define_color_names() {
+
+  ColorNames=( Black Red Green Yellow Blue Magneta Cyan White )
+  FgColors=(    30   31   32    33     34   35      36   37  )
+  BgColors=(    40   41   42    43     44   45      46   47  )
+
+  local AttrNorm=0
+  local AttrBright=1
+  local AttrDim=2
+  local AttrUnder=4
+  local AttrBlink=5
+  local AttrRev=7
+  local AttrHide=8
+
+  # define "BoldCOLOR", "BrightCOLOR", and "DimCOLOR" names
+
+  # _map_colors ATTRNAME ATTRVALUE
+  #
+  # Defines three names for every color, attribute combintaion:
+  #    {ATTRNAME}{COLORNAME}
+  #    {ATTRNAME}{COLORNAME}Fg
+  #    {ATTRNAME}{COLORNAME}Bg
+  #
+  # Example: BoldRed, BoldRedFg, BoldRedBg
+
+  _map_colors() {
+    local x=0
+    local attrname="$1"
+    local attrcode=$2
+    while (( x < 8 )) ; do
+      local colorname=${ColorNames[x]}
+      local fgcolorcode=${FgColors[x]}
+      local bgcolorcode=${BgColors[x]}
+      longcolorname="${attrname}${colorname}"
+      _def_color $longcolorname     $attrcode $fgcolorcode
+      _def_color ${longcolorname}Fg $attrcode $fgcolorcode
+      _def_color ${longcolorname}Bg $attrcode $bgcolorcode
+      (( x++ ))
+    done
+  }
+
+  # _term_color [ N | N M ]
+  _term_color() {
+    local cv
+    if (( $# > 1 )); then
+      cv="${1};${2}"
+    else
+      cv="${1}"
+    fi
+    echo "\[\033[${cv}m\]"
+  }
+
+  # def_color NAME ATTRCODE COLORCODE
+  _def_color() {
+    local def="$1=\"\`_term_color $2 $3\`\""
+    if [[ -n "$debug$verbose" ]]; then
+      echo 1>&2 "+ $def"
+    fi
+    eval "$def"
+  }
+
+  #ResetColor="`_term_color 0`"         # Text reset
+
+  _map_colors Bold   $AttrBright
+  _map_colors Bright $AttrBright
+  _map_colors Dim    $AttrDim
+  _map_colors ''     $AttrNorm
+
+  _def_color IntenseBlack 0 90
+  _def_color ResetColor   0 0
+
+}
+define_color_names
+
+# end of prompt-colors.sh
+# vim: set ai sw=2