monitors: draw a scale being typed at 1

The page binds the canvas to size(), and an empty or partial scale gave
Infinity or NaN and broke the fit. Apply is still held back until the
scale is a positive number. Also marks the per-axis snap as a ceiling
and checks a rotated scaled monitor and a two-monitor file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/desktop/modules/monitors/Mon.js b/desktop/modules/monitors/Mon.js
index 9b5e158..865e155 100644
--- a/desktop/modules/monitors/Mon.js
+++ b/desktop/modules/monitors/Mon.js
@@ -52,12 +52,14 @@ function draft(m) {
              position: m.x + "x" + m.y, x: m.x, y: m.y };
 }
 
-// Logical size: an odd transform is a quarter turn, scale divides.
+// Logical size: an odd transform is a quarter turn, scale divides. A scale
+// being typed ("", "1.") draws at 1 until it is a positive number.
 function size(mode, scale, transform) {
     const p = /^(\d+)x(\d+)/.exec(mode);
+    const k = +scale > 0 ? +scale : 1;
     let w = +p[1], h = +p[2];
     if (transform % 2) { const t = w; w = h; h = t; }
-    return { w: w / +scale, h: h / +scale };
+    return { w: w / k, h: h / k };
 }
 
 // The layout position: exact XxY, or where Hyprland last put an auto one.
@@ -90,6 +92,9 @@ function nearest(v, cands, t) {
 
 // r ({x, y, w, h}, logical) moved so an edge within t lies on an edge of one
 // of others: beside it, or aligned with it. Each axis on its own, rounded.
+// ponytail: an axis snaps to a monitor however far off it is on the other
+// axis, and overlaps are not refused; right for two monitors, check both
+// axes together if a third is added.
 function snap(r, others, t) {
     const xs = [], ys = [];
     for (const o of others) {