parse ConEmu OSC9;5 (#4948)

| Sequence | Description |
| - | - |
ESC ] 9 ; 5 ST | Wait for Enter/Space/Esc. Set environment variable
“ConEmuWaitKey” to “ENTER”/”SPACE”/”ESC” on exit.

Source:
https://conemu.github.io/en/AnsiEscapeCodes.html#OSC_Operating_system_commands

#3125

src/terminal/osc.zig

@@ -178,6 +178,9 @@ pub const Command = union(enum) {
         progress: ?u8 = null,
     },
 
+    /// Wait input (OSC 9;5)
+    wait_input: void,
+
     pub const ColorKind = union(enum) {
         palette: u8,
         foreground,
@@ -811,6 +814,11 @@ pub const Parser = struct {
                 '4' => {
                     self.state = .conemu_progress_prestate;
                 },
+                '5' => {
+                    self.state = .swallow;
+                    self.command = .{ .wait_input = {} };
+                    self.complete = true;
+                },
 
                 // Todo: parse out other ConEmu operating system commands.
                 // Even if we don't support them we probably don't want
@@ -2096,6 +2104,30 @@ test "OSC: OSC9 progress pause with progress" {
     try testing.expect(cmd.progress.progress == 100);
 }
 
+test "OSC: OSC9 conemu wait input" {
+    const testing = std.testing;
+
+    var p: Parser = .{};
+
+    const input = "9;5";
+    for (input) |ch| p.next(ch);
+
+    const cmd = p.end('\x1b').?;
+    try testing.expect(cmd == .wait_input);
+}
+
+test "OSC: OSC9 conemu wait ignores trailing characters" {
+    const testing = std.testing;
+
+    var p: Parser = .{};
+
+    const input = "9;5;foo";
+    for (input) |ch| p.next(ch);
+
+    const cmd = p.end('\x1b').?;
+    try testing.expect(cmd == .wait_input);
+}
+
 test "OSC: empty param" {
     const testing = std.testing;
 

src/terminal/stream.zig

@@ -1605,7 +1605,7 @@ pub fn Stream(comptime Handler: type) type {
                     } else log.warn("unimplemented OSC callback: {}", .{cmd});
                 },
 
-                .progress, .sleep, .show_message_box, .change_conemu_tab_title => {
+                .progress, .sleep, .show_message_box, .change_conemu_tab_title, .wait_input => {
                     log.warn("unimplemented OSC callback: {}", .{cmd});
                 },
             }