config: Terminus by default, and stop hiding knobs in the source

config.h now carries everything a reader would reasonably want to change:
both fonts, the liturgical palette and the fallback for an unlisted
colour, the selection rings, geometry, weekday headings, the detail-pane
labels, the window title, and which rank earns a badge and what it says.
Several of those were literals buried in colitur-x.c.

Default font is Terminus:pixelsize=20:antialias=false, matching st.
Terminus is a bitmap face, so it exists only at fixed pixelsizes -- the
list is in the comment, because asking for one it lacks silently gets a
substitute rather than an error.

Layout metrics now come from the font instead of magic numbers: line
height and the badge from XftFont ascent/descent in colitur-x, column
widths in characters rather than pixels in colitur-mu. Before this,
changing the font size left a 13px line height and a 110px date column
that quietly truncated their contents.

1 files changed, 56 insertions, 20 deletions

diff --git a/config.h b/config.h
index 6fe5857..36fe3cd 100644
--- a/config.h
+++ b/config.h
@@ -1,10 +1,20 @@
-/* colitur-x -- compile-time configuration, suckless style.
- * Edit, `make`, done. There is no runtime config file by design. */
+/* colitur-x / colitur-mu -- compile-time configuration, suckless style.
+ * Edit, `make`, `make install`. There is no runtime config file: colitur
+ * itself owns the CALENDAR's configuration (language, sigla, overlays);
+ * this file owns only how it is painted.
+ */
 
-static const char *font       = "monospace:size=10";
-static const char *font_big   = "monospace:size=14:bold";
+/* ------------------------------------------------------------------ fonts */
+/* Any fontconfig name. Terminus is a bitmap font, so it exists only at
+   fixed pixelsizes (12 14 16 18 20 22 24 28 32) and wants antialias=false;
+   asking for a size it does not have silently gets you a substitute. */
+static const char *font     = "Terminus:pixelsize=20:antialias=false";
+static const char *font_big = "Terminus:pixelsize=20:style=Bold:antialias=false";
 
-/* Liturgical colours, as the engine names them -> what to paint. */
+/* ---------------------------------------------------------------- colours */
+/* Liturgical colours, keyed by the name colitur emits in the `colour`
+   column. bg is the cell, fg is its text; every other marker is derived
+   from these two so it cannot become invisible against an odd combination. */
 static const struct { const char *name, *bg, *fg; } palette[] = {
 	{ "white",  "#f7f5ef", "#1a1a1a" },
 	{ "red",    "#b03030", "#ffffff" },
@@ -13,23 +23,49 @@ static const struct { const char *name, *bg, *fg; } palette[] = {
 	{ "black",  "#202020", "#e0e0e0" },
 	{ "rose",   "#d9a0b0", "#1a1a1a" },
 };
+static const char *col_unknown_bg = "#808080";  /* a colour not listed above */
+static const char *col_unknown_fg = "#ffffff";
 
-static const char *col_bg     = "#141414";  /* window background   */
-static const char *col_grid   = "#3a3a3a";  /* cell borders        */
-static const char *col_head   = "#8a8a8a";  /* weekday headings    */
-static const char *col_detail = "#e8e8e8";  /* detail pane text    */
-/* The selected day is ringed TWICE: a dark ring outside a bright one, so
-   the marker survives on a white cell and on a red one alike. A single
-   bright ring vanishes against white; a single dark one vanishes against
-   black. */
+static const char *col_bg     = "#141414";  /* window background        */
+static const char *col_grid   = "#3a3a3a";  /* rule above the detail pane */
+static const char *col_head   = "#8a8a8a";  /* title and weekday row    */
+static const char *col_detail = "#e8e8e8";  /* detail pane text         */
+
+/* The selected day is ringed TWICE, dark outside and bright inside, so it
+   survives on a white cell and on a red one alike. A single bright ring
+   vanishes against white; a single dark one vanishes against black. */
 static const char *col_sel_dark  = "#1a1a1a";
 static const char *col_sel_light = "#ffd24a";
-enum { SEL_RING = 3 };                      /* px per ring */
+enum { SEL_RING = 3 };                       /* px per ring */
+
+/* --------------------------------------------------------------- geometry */
+/* CELL_W/CELL_H must suit the font: a cell holds the day number plus
+   NAME_LINES lines of `font`. Line height itself is taken from the font at
+   runtime, so only these two need revisiting when you change size.
+   Rough guide: CELL_W >= 10 * (widest name chars you want), CELL_H >=
+   big-font height + NAME_LINES * font height + 12. */
+enum {
+	CELL_W    = 196,
+	CELL_H    = 116,
+	PAD       = 10,   /* margin around the grid            */
+	HEAD_H    = 62,   /* title + weekday headings          */
+	DETAIL_H  = 116,  /* the pane under the grid           */
+	NAME_LINES = 3,   /* how many lines a feast name gets  */
+};
 
-/* A I-class day is marked with a BADGE, not coloured text: the badge is
-   filled with the cell's own foreground and the glyph drawn in its
-   background, so it inverts against whatever the day's colour is. Gold on
-   white -- the first attempt -- was very nearly invisible. */
-static const char *rank1_glyph = "I";
+/* ------------------------------------------------------------------ labels */
+/* Weekday headings, Sunday first. These are the VIEWER's own text, not
+   colitur's: the day names inside each cell come from the CSV and follow
+   whatever --lang produced it. Set these to match. */
+static const char *dow_headings[7] = {
+	"Dom", "Fer II", "Fer III", "Fer IV", "Fer V", "Fer VI", "Sab"
+};
+static const char *label_epistle = "Epistola";
+static const char *label_gospel  = "Evangelium";
+static const char *window_title  = "colitur";
 
-enum { CELL_W = 122, CELL_H = 74, PAD = 10, HEAD_H = 46, DETAIL_H = 92 };
+/* Which rank gets a badge, and what the badge says. The value is compared
+   against colitur's own `rank` column (class-1 | class-2 | class-3 |
+   class-4), so "class-2" here would mark second-class feasts instead. */
+static const char *badge_rank  = "class-1";
+static const char *badge_glyph = "I";