Add color mixing

bin/omarchy-theme-set-templates

@@ -8,34 +8,137 @@ USER_TEMPLATES_DIR="$HOME/.config/omarchy/themed"
 NEXT_THEME_DIR="$HOME/.config/omarchy/current/next-theme"
 COLORS_FILE="$NEXT_THEME_DIR/colors.toml"
 
+declare -A THEME_COLORS
+
 # Convert hex color to decimal RGB (e.g., "#1e1e2e" -> "30,30,46")
 hex_to_rgb() {
   local hex="${1#\#}"
   printf "%d,%d,%d" "0x${hex:0:2}" "0x${hex:2:2}" "0x${hex:4:2}"
 }
 
+# Mix two hex colors. Amount may be a fraction (0.30) or percentage (30%).
+mix_color() {
+  local start="${1#\#}"
+  local end="${2#\#}"
+  local amount="$3"
+
+  awk -v start="$start" -v end="$end" -v amount="$amount" '
+    function hex_value(char) {
+      return index("0123456789abcdef", tolower(char)) - 1
+    }
+
+    function hex_pair_to_int(hex, idx) {
+      return hex_value(substr(hex, idx, 1)) * 16 + hex_value(substr(hex, idx + 1, 1))
+    }
+
+    BEGIN {
+      if (amount ~ /%$/) {
+        sub(/%$/, "", amount)
+        amount = amount / 100
+      } else {
+        amount += 0
+        if (amount > 1) amount = amount / 100
+      }
+
+      if (amount < 0) amount = 0
+      if (amount > 1) amount = 1
+
+      start_r = hex_pair_to_int(start, 1)
+      start_g = hex_pair_to_int(start, 3)
+      start_b = hex_pair_to_int(start, 5)
+      end_r = hex_pair_to_int(end, 1)
+      end_g = hex_pair_to_int(end, 3)
+      end_b = hex_pair_to_int(end, 5)
+
+      red = int(start_r * (1 - amount) + end_r * amount + 0.5)
+      green = int(start_g * (1 - amount) + end_g * amount + 0.5)
+      blue = int(start_b * (1 - amount) + end_b * amount + 0.5)
+
+      printf "#%02x%02x%02x\n", red, green, blue
+    }
+  '
+}
+
+add_template_value() {
+  local key="$1"
+  local value="$2"
+  local rgb
+
+  printf 's|{{ %s }}|%s|g\n' "$key" "$value" >>"$sed_script"
+  printf 's|{{ %s_strip }}|%s|g\n' "$key" "${value#\#}" >>"$sed_script"
+
+  if [[ $value =~ ^#[0-9A-Fa-f]{6}$ ]]; then
+    rgb=$(hex_to_rgb "$value")
+    printf 's|{{ %s_rgb }}|%s|g\n' "$key" "$rgb" >>"$sed_script"
+  fi
+}
+
+add_mix_value() {
+  local token="$1"
+  local content fn start_key end_key amount start end value
+
+  content="${token#\{\{}"
+  content="${content%\}\}}"
+  read -r fn start_key end_key amount <<<"$content"
+
+  start="${THEME_COLORS[$start_key]:-}"
+  end="${THEME_COLORS[$end_key]:-}"
+
+  [[ $start =~ ^#[0-9A-Fa-f]{6}$ && $end =~ ^#[0-9A-Fa-f]{6}$ ]] || return
+
+  value=$(mix_color "$start" "$end" "$amount")
+
+  case "$fn" in
+    mix)
+      ;;
+    mix_strip)
+      value="${value#\#}"
+      ;;
+    mix_rgb)
+      value=$(hex_to_rgb "$value")
+      ;;
+    *)
+      return
+      ;;
+  esac
+
+  printf 's|%s|%s|g\n' "$token" "$value" >>"$sed_script"
+}
+
+add_mix_values() {
+  local tpl token
+  local -A seen=()
+
+  for tpl in "${template_files[@]}"; do
+    while IFS= read -r token; do
+      [[ -n ${seen[$token]:-} ]] && continue
+      seen[$token]=1
+      add_mix_value "$token"
+    done < <(grep -hEo '\{\{[[:space:]]*mix(_strip|_rgb)?[[:space:]]+[A-Za-z0-9_]+[[:space:]]+[A-Za-z0-9_]+[[:space:]]+[0-9]+([.][0-9]+)?%?[[:space:]]*\}\}' "$tpl" 2>/dev/null || true)
+  done
+}
+
 # Only generate dynamic templates for themes with a colors.toml definition
 if [[ -f $COLORS_FILE ]]; then
   sed_script=$(mktemp)
 
+  shopt -s nullglob
+  template_files=("$USER_TEMPLATES_DIR"/*.tpl "$TEMPLATES_DIR"/*.tpl)
+
   while IFS='=' read -r key value; do
     key="${key//[\"\' ]/}"                # strip quotes and spaces from key
     [[ $key && $key != \#* ]] || continue # skip empty lines and comments
     value="${value#*[\"\']}"
     value="${value%%[\"\']*}" # extract value between quotes (ignores inline comments)
 
-    printf 's|{{ %s }}|%s|g\n' "$key" "$value"            # {{ key }} -> value
-    printf 's|{{ %s_strip }}|%s|g\n' "$key" "${value#\#}" # {{ key_strip }} -> value without leading #
-    if [[ $value =~ ^# ]]; then
-      rgb=$(hex_to_rgb "$value")
-      echo "s|{{ ${key}_rgb }}|${rgb}|g"
-    fi
-  done <"$COLORS_FILE" >"$sed_script"
+    THEME_COLORS[$key]="$value"
+    add_template_value "$key" "$value"
+  done <"$COLORS_FILE"
 
-  shopt -s nullglob
+  add_mix_values
 
   # Process user templates first, then built-in templates (user overrides built-in)
-  for tpl in "$USER_TEMPLATES_DIR"/*.tpl "$TEMPLATES_DIR"/*.tpl; do
+  for tpl in "${template_files[@]}"; do
     filename=$(basename "$tpl" .tpl)
     output_path="$NEXT_THEME_DIR/$filename"