sl0ppty: one theme name per decision, and a tab you can see

The count, since it was asked: no hardcoded colours at all in the drawing code.
Every colour already came from the config. The problem was the other way round
— six names were serving about thirty decisions, so the names were the thing
that was hardcoded. frame_focus was the focused frame *and* the split guide
*and* the resize handle *and* the tab hover *and* a collapsed row under the
pointer. Recolouring one recoloured five.

There are thirty-five entries now, one per surface, each documented in
config.kdl by being its own default. Several still share a value: that is a
statement that they look right together, not that they are the same thing, and
the difference only matters the first time someone wants to change one of them.

The tab you are in is filled rather than merely bold, which was the ask. Bold
alone is easy to miss on a strip of short labels, and it was the only thing
distinguishing the tab you were in from the four you were not.

That immediately raised a question the old scheme could not ask: what does
hovering the active tab look like, when it already has the strongest treatment
on the strip? Keeping its fill and brightening its text, because it is still
the tab you are in and clicking it does nothing. My first version gave it no
hover at all, which reads as the hover being broken rather than as the click
being pointless.

Three surfaces were still borrowing a name that did not describe them: the
in-place rename editor was wearing the button colours, a pane's OSC status text
and a suspended pane's hint were wearing the frame's. They have their own now.

1 files changed, 60 insertions, 10 deletions

diff --git a/config/config.kdl b/config/config.kdl
index 51202b7..70b1a8a 100644
--- a/config/config.kdl
+++ b/config/config.kdl
@@ -171,23 +171,73 @@ toast_ms 2500
 
 // ── theme ───────────────────────────────────────────────────────────────────
 
+// Every colour the compositor draws has its own name here. They started as six
+// names doing thirty jobs, which meant the split guide could not be recoloured
+// without also recolouring the focused frame, because they were the same
+// entry. Several still share a default: that says they look right together,
+// not that they are the same thing.
 theme {
     // What a cell's "terminal default" colour is taken to be when a shader has
-    // to compute on it (dimming a pane, greying it out). We never learn your
-    // terminal's real default, and most text is default-coloured, so without
-    // these a shader would leave nearly everything untouched. Set them to your
-    // terminal's actual foreground/background or shaded panes will shift
-    // colour as they turn on. Panes with no shader ignore these entirely and
-    // still defer to your terminal.
+    // to compute on it. See the shaders section above.
     default_fg "#ffffff"
     default_bg "#000000"
 
-    frame_focus "#ff5fd7"
-    frame_idle "#45454a"
-    title "#ffffff"
+    // ── panes ───────────────────────────────────────────────────────────────
+    frame_focus "#ff5fd7"      // border of the focused pane
+    frame_idle "#45454a"       // border of every other pane
+    title "#ffffff"            // its title, and its OSC 5577 status text
+    title_idle "#45454a"       // the same, on a pane that is not focused
+
+    // A pane's own OSC 5577 buttons.
     button_fg "#141418"
     button_bg "#ff5fd7"
-    button_bg_idle "#55555c"
+    button_bg_idle "#55555c"   // buttons on a pane that is not focused
+
+    // ── things that appear under the pointer ────────────────────────────────
+    guide "#ff5fd7"            // split guide: armed edge, dashed boundary, arrow
+    resize "#ff5fd7"           // the handle in the gap between two panes
+    drop_target "#ff5fd7"      // frame of a pane a drag could land on
+
+    // ── a pane's scrollback indicator ───────────────────────────────────────
+    scroll_fg "#141418"
+    scroll_bg "#ff5fd7"
+
+    // ── rows of a tab that has collapsed into a list ────────────────────────
+    header "#45454a"
+    header_hover "#ff5fd7"          // the rule, under the pointer
+    header_hover_title "#ffffff"    // the name, under the pointer
+
+    // ── the strip along the top ─────────────────────────────────────────────
+    // The tab you are in is filled rather than merely bold: bold alone is easy
+    // to miss on a strip of short labels. It keeps that fill while the pointer
+    // is on it -- it is still the tab you are in -- so its hover lands on the
+    // text instead.
+    tab_active_fg "#141418"
+    tab_active_bg "#ff5fd7"
+    tab_active_hover_fg "#ffffff"
+    tab_idle "#45454a"
+    tab_hover "#ff5fd7"
+    prefix_fg "#141418"        // the "C-a" badge, while the prefix is pending
+    prefix_bg "#ff5fd7"
+    tab_count "#45454a"        // panes in the whole session
+
+    // ── the line along the bottom ───────────────────────────────────────────
+    status "#45454a"           // session, tab, pane, and the pane index
+    status_state "#ffffff"     // scrolled / alt screen / not started / exited
+
+    // ── the pane finder ─────────────────────────────────────────────────────
+    finder_fg "#ffffff"
+    finder_bg "#45454a"
+    finder_sel_fg "#141418"
+    finder_sel_bg "#ff5fd7"
+
+    // ── the in-place editor a double-click opens on a pane title ────────────
+    rename_fg "#141418"
+    rename_bg "#ff5fd7"
+
+    // ── announcements ───────────────────────────────────────────────────────
+    toast_fg "#141418"
+    toast_bg "#ff5fd7"
 }
 
 // ── keys ────────────────────────────────────────────────────────────────────