1 files changed, 17 insertions, 0 deletions
diff --git a/src/exec.zig b/src/exec.zig
index d4480e00..6de7991c 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -808,6 +808,8 @@ pub const NewPane = enum { scratch, fs, shell, doc, command, errors };
 /// t->w == nil).
 pub fn placeNew(p: *Pardes, from: usize, origin: ?usize, id: usize, kind: NewPane) void {
     const asked = if (p.exec_column != null) null else origin;
+    layout.compute(p);
+    const before = p.rects;
     switch (p.settings.placement) {
         .acme => switch (kind) {
             // New: the bottom half of the last pane in its own column
@@ -821,6 +823,21 @@ pub fn placeNew(p: *Pardes, from: usize, origin: ?usize, id: usize, kind: NewPan
         },
         .pardes => pardesPlace(p, from, id, kind),
     }
+    // No pane is made shorter than its tag and two rows: where the place
+    // chosen has not the room, the column's tallest pane gives it, and
+    // where none can, the pane is refused, and closed at the step's end
+    // (Pardes.unplaced) once whatever made it is done with it.
+    if (!layout.placedRoomy(p, id, &before)) if (layout.findPane(p, id)) |f| {
+        layout.removePane(p, id);
+        for (p.col_panes[f.col][0..p.col_n[f.col]]) |k| p.rects[k] = before[k];
+        layout.snapColWeights(p, f.col);
+        if (!layout.splitTallest(p, f.col, id) or !layout.placedRoomy(p, id, &before)) {
+            if (layout.findPane(p, id) == null) layout.insert(p, f.col, p.col_n[f.col], id);
+            p.unplaced.set(id);
+            p.reportError(from, "placement", error.NoPaneRoom);
+            return;
+        }
+    };
     if (kind == .command) return;
     tagline.exitHeader(p);
     p.active = id;