config.zig: every binding and every piece of Look syntax in one file

Retargeting a key, a mouse chord or a spelling is now an edit to src/config.zig
and nothing else. Three parts in reading order: pardes's own bindings (where a
reader lands), the Look/Exec syntax, then the helix keymap under a banner
saying hxdiff/hxparity are differential suites against real helix, so a key
moved there is a divergence and not a tweak.

The bindings are data a comptime loop can walk, because the builtin index is
going to walk them.

Duplication this cut: is/isC/isA became one hit(key, chords) over ~132 call
sites, and a binding being a LIST collapses the letter-or-arrow chains;
swap_enter_tab is gone, replaced by look_key/exec_key that can point anywhere;
the four focus builtins' h/j/k/l lived hardcoded in two places and is now one
table.

No golden moved.

1 files changed, 5 insertions, 4 deletions

diff --git a/src/file_pane.zig b/src/file_pane.zig
index 4c02e983..68fea40f 100644
--- a/src/file_pane.zig
+++ b/src/file_pane.zig
@@ -5,6 +5,7 @@
 //! is the pane machinery in pardes.zig, which does not care what kind it is.
 const std = @import("std");
 const pardes = @import("pardes.zig");
+const config = @import("config.zig");
 const Pardes = pardes.Pardes;
 const Pane = pardes.Pane;
 const File = pardes.File;
@@ -115,7 +116,7 @@ pub fn bodyText(arena: std.mem.Allocator, pane: *Pane, f: *File) ![]const u8 {
         }
         // horizontal scroll: cut hscroll columns after the gutter
         if (pane.hscroll > 0) {
-            const cut_at = row_start + pardes.PREFIX_W;
+            const cut_at = row_start + config.PREFIX_W;
             if (out.items.len > cut_at) {
                 const cut = @min(@as(usize, @intCast(pane.hscroll)), out.items.len - cut_at);
                 out.replaceRangeAssumeCapacity(cut_at, cut, &.{});
@@ -140,7 +141,7 @@ pub fn drawGutter(p: *Pardes, pane: *Pane, r: pardes.Rect, tx: u16, tw: u16, bod
     while (vr < body_h) : (vr += 1) {
         const on_cursor = @as(i32, vr) == cur_vr;
         var c: u16 = 0;
-        while (c < pardes.PREFIX_W and c < tw) : (c += 1) {
+        while (c < config.PREFIX_W and c < tw) : (c += 1) {
             const cell = s.at(tx + c, r.y + pardes.BOX_H + vr);
             cell.default = false; // paints blank gutter rows too
             if (on_cursor) {
@@ -181,13 +182,13 @@ pub fn recolorSyntax(p: *Pardes, pane: *Pane, f: *File, r: pardes.Rect, tx: u16,
         const line = flines.next() orelse break;
         const base = @intFromPtr(line.ptr) - @intFromPtr(f.content.ptr);
         var c: usize = 0;
-        while (hs + c < line.len and pardes.PREFIX_W + c < tw) : (c += 1) {
+        while (hs + c < line.len and config.PREFIX_W + c < tw) : (c += 1) {
             const idx = base + hs + c;
             if (idx < f.highlight_start) continue;
             const hidx = idx - f.highlight_start;
             if (hidx >= f.highlights.len) continue;
             const ss = synStyle(p, @enumFromInt(f.highlights[hidx])) orelse continue;
-            const cell = s.at(tx + @as(u16, @intCast(pardes.PREFIX_W + c)), r.y + pardes.BOX_H + vr);
+            const cell = s.at(tx + @as(u16, @intCast(config.PREFIX_W + c)), r.y + pardes.BOX_H + vr);
             if (cell.default) continue;
             cell.style.fg = .{ .rgb = ss.fg };
             cell.style.bold = ss.bold;