A terminal is typed into only when idle at an empty prompt

A look at a directory, or an exec at a terminal, typed its line after
whatever sat unsent at the prompt and ran the two joined (`echo TYPEDls`).
A terminal with text at its prompt now takes no line; a look at its
directory opens a new terminal, an exec runs as a command pane.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/exec.zig b/src/exec.zig
index 6e437093..ebe90b98 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -37,6 +37,12 @@ pub fn takesCommandLine(p: *const Pardes, id: usize) bool {
     const pane = p.panes[id] orelse return false;
     // A command pane's child is its command, never a shell to type at.
     if (!pane.isTerminal() or pane.command != null) return false;
+    // Someone's line at the shell's prompt, typed and not sent: typing a
+    // command there would run it joined to theirs (`echo TYPEDls`). Only an
+    // idle, EMPTY prompt is typed at; otherwise a new pane runs the line.
+    // (Text in pardes's own edit buffer is not the shell's yet: an exec of
+    // it, or of anything, types only what it runs.)
+    if (panes.Terminal.promptInputReady(pane) and !panes.Terminal.promptInputEmpty(pane)) return false;
     // A mounted shell sits behind sudo's process supervisor. Its OSC 133
     // prompt marks identify input readiness; the launcher's executable is
     // not the shell executable used by the ordinary process heuristic.
@@ -371,7 +377,7 @@ fn spawnTtyWithMount(p: *Pardes, from: usize, v9fs: bool) ?*Pane {
 
 /// Whether `path` is a directory on this host, the turn out while it asks
 /// (it may be inside a mount this editor serves).
-fn isDirectory(path: []const u8) bool {
+pub fn isDirectory(path: []const u8) bool {
     var buf: [4096]u8 = undefined;
     const z = std.fmt.bufPrintSentinel(&buf, "{s}", .{path}, 0) catch return false;
     pardes.turn.yield();