Add more colour to calendar

python · hugovk · Mar 30, 2026 · Mar 31, 2026 · Apr 10, 2026 · Apr 10, 2026
commit 9e95c430d77a21125729cae4afa0f8b3b7f50ec7
@@ -188,6 +188,14 @@ class Argparse(ThemeSection):
     message: str = ANSIColors.MAGENTA
 
 
+@dataclass(frozen=True, kw_only=True)
+class Calendar(ThemeSection):
+    header: str = ANSIColors.BOLD
+    highlight: str = ANSIColors.BLACK + ANSIColors.BACKGROUND_YELLOW
+    weekday: str = ANSIColors.CYAN
+    reset: str = ANSIColors.RESET
+
+
 @dataclass(frozen=True, kw_only=True)
 class Difflib(ThemeSection):
     """A 'git diff'-like theme for `difflib.unified_diff`."""
@@ -404,6 +412,7 @@ class Theme:
     below.
     """
     argparse: Argparse = field(default_factory=Argparse)
+    calendar: Calendar = field(default_factory=Calendar)
     difflib: Difflib = field(default_factory=Difflib)
     fancycompleter: FancyCompleter = field(default_factory=FancyCompleter)
     http_server: HttpServer = field(default_factory=HttpServer)
@@ -417,6 +426,7 @@ def copy_with(
         self,
         *,
         argparse: Argparse | None = None,
+        calendar: Calendar | None = None,
         difflib: Difflib | None = None,
         fancycompleter: FancyCompleter | None = None,
         http_server: HttpServer | None = None,
@@ -433,6 +443,7 @@ def copy_with(
         """
         return type(self)(
             argparse=argparse or self.argparse,
+            calendar=calendar or self.calendar,
             difflib=difflib or self.difflib,
             fancycompleter=fancycompleter or self.fancycompleter,
             http_server=http_server or self.http_server,
@@ -453,6 +464,7 @@ def no_colors(cls) -> Self:
         """
         return cls(
             argparse=Argparse.no_colors(),
+            calendar=Calendar.no_colors(),
             difflib=Difflib.no_colors(),
             fancycompleter=FancyCompleter.no_colors(),
             http_server=HttpServer.no_colors(),

@@ -686,28 +686,61 @@ def __init__(self, highlight_day=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.highlight_day = highlight_day
 
-    def formatweek(self, theweek, width, *, highlight_day=None):
+    def _get_theme(self):
+        from _colorize import get_theme
+
+        return get_theme(tty_file=sys.stdout)
+
+    def formatday(self, day, weekday, width, *, highlight_day=None):
         """
-        Returns a single week in a string (no newline).
+        Returns a formatted day.
         """
-        if highlight_day:
-            from _colorize import get_colors
-
-            ansi = get_colors()
-            highlight = f"{ansi.BLACK}{ansi.BACKGROUND_YELLOW}"
-            reset = ansi.RESET
+        if day == 0:
+            s = ''
         else:
-            highlight = reset = ""
+            s = f'{day:2}'
+        s = s.center(width)
+        if day == highlight_day:
+            theme = self._get_theme().calendar
+            s = f"{theme.highlight}{s}{theme.reset}"
+        return s
 
+    def formatweek(self, theweek, width, *, highlight_day=None):
+        """
+        Returns a single week in a string (no newline).
+        """
         return ' '.join(
-            (
-                f"{highlight}{self.formatday(d, wd, width)}{reset}"
-                if d == highlight_day
-                else self.formatday(d, wd, width)
-            )
+            self.formatday(d, wd, width, highlight_day=highlight_day)
             for (d, wd) in theweek
         )
 
+    def formatweekheader(self, width):
+        """
+        Return a header for a week.
+        """
+        header = super().formatweekheader(width)
+        theme = self._get_theme().calendar
+        return f"{theme.weekday}{header}{theme.reset}"
+
+    def formatmonthname(self, theyear, themonth, width, withyear=True):
+        """
+        Return a formatted month name.
+        """
+        name = super().formatmonthname(theyear, themonth, width, withyear)
+        theme = self._get_theme().calendar
+        if (
+            self.highlight_day
+            and self.highlight_day.year == theyear
+            and self.highlight_day.month == themonth
+        ):
+            color = theme.highlight
+            name_only = name.strip()
+            colored_name = f"{color}{name_only}{theme.reset}"
+            return name.replace(name_only, colored_name, 1)
+        else:
+            color = theme.header
+        return f"{color}{name}{theme.reset}"
+
     def formatmonth(self, theyear, themonth, w=0, l=0):
         """
         Return a month's calendar string (multi-line).
@@ -742,7 +775,9 @@ def formatyear(self, theyear, w=2, l=1, c=6, m=3):
         colwidth = (w + 1) * 7 - 1
         v = []
         a = v.append
-        a(repr(theyear).center(colwidth*m+c*(m-1)).rstrip())
+        theme = self._get_theme().calendar
+        year = repr(theyear).center(colwidth*m+c*(m-1)).rstrip()
+        a(f"{theme.header}{year}{theme.reset}")
         a('\n'*l)
         header = self.formatweekheader(w)
         for (i, row) in enumerate(self.yeardays2calendar(theyear, m)):

@@ -1063,6 +1063,7 @@ def test_several_leapyears_in_range(self):
 def conv(s):
     return s.replace('\n', os.linesep).encode()
 
+@support.force_not_colorized_test_class
 class CommandLineTestCase(unittest.TestCase):
     def setUp(self):
         self.runners = [self.run_cli_ok, self.run_cmd_ok]