bugGNU Screen - Bugs: bug #23719, [patch] row/column report escape...


bug #23719: [patch] row/column report escape sequence

Submitter:  Micah Cowan <micahcowan>
Submitted:  Fri 27 Jun 2008 05:38:14 AM UTC
Category:  Feature Request Severity:  3 - Normal
Priority:  * 5 - Normal Status:  Confirmed
Privacy:  Public Assigned to:  None
Open/Closed:  Open Release:  None
Fixed Release:  None Planned Release:  Later
Work Required:  None
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Fri 27 Jun 2008 05:38:14 AM UTC, original submission:  

From the mailing list:

I've noticed that screen doesn't implement a potentially useful escape sequence that allows the client to query the window size.  (At least not in 4.0.2, which is the latest release version on the ftp site.)  I'm not sure how standard this sequence is, but it's implemented by xterm, dtterm, gnome terminal, and probably others.

I added support to my local copy by adding a few lines to ansi.c.  In case anyone is interested, I've attached the patch.

One reference I've found for this "CSI 18 ; t" sequence is here:


diff -Nru screen-4.0.2.orig/ansi.c screen-4.0.2/ansi.c
--- screen-4.0.2.orig/ansi.c        2003-12-05 06:57:05.000000000 -0700
+++ screen-4.0.2/ansi.c        2008-06-26 22:25:26.000000000 -0600
@@ -1225,6 +1225,11 @@
         case 't':
+          if (a1 == 18) {
+            /* report the window size */
+            Report("\033[8;%d;%dt", curr->w_height, curr->w_width);
+            break;
+          }
           if (a1 != 8)
           a1 = curr->w_args[2];

(In answer to the question of "how standard"; it couldn't be officially standard, as t (7/5) falls under the "Private Use" final bytes for CSI sequences. -mjc)

Micah Cowan <micahcowan>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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    Date Changed by Updated Field Previous Value => Replaced by
    2008-08-09 micahcowan StatusNeed Discussion Confirmed

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