0001-Correctly-handle-long-lines.patch

From 93883b8bf4a5d50e388db0d2eb95caebe2cdd42d Mon Sep 17 00:00:00 2001
From: Axel Wagner <mail@merovius.de>
Date: Sun, 1 Sep 2013 13:42:19 +0200
Subject: [PATCH] Correctly handle long lines

---
 urxvt/shellex.in | 44 ++++++++++++++++++++++++--------------------
 1 file changed, 24 insertions(+), 20 deletions(-)

diff --git a/urxvt/shellex.in b/urxvt/shellex.in
index 4fb0744..17b1303 100644
--- a/urxvt/shellex.in
+++ b/urxvt/shellex.in
@@ -3,6 +3,7 @@
 use X11::Protocol;
 use File::Temp qw|tempfile|;
 use File::Basename qw|basename|;
+use POSIX qw|ceil|;
 use strict;
 
 # The existing Randr-modules on CPAN seem to work only barely, so instead we
@@ -213,27 +214,30 @@ sub on_add_lines {
     $str =~ s/\r/\\r/g;
     print "add_lines(string = \"$str\")\n";
 
-    my $nl = ($string =~ tr/\n//);
-    if ($nl > 0) {
-        my $nrow = 0;
-        for my $i ($self->top_row .. $self->nrow-1) {
-            if ($self->ROW_l($i) > 0) {
-                print "row $i is " . $self->ROW_l($i) . "\n";
-                $nrow++;
-            }
-        }
-        $nrow = $nrow > 0 ? $nrow : 1;
-        print "resizing to $nrow + $nl\n";
-        $nrow += $nl;
-
-        # If the window is supposed to be at the bottom, we have to move the
-        # window up a little bit
-        my $y = $self->{y};
-        if ($self->{bottom}) {
-            $y -= 2+$nrow*$self->fheight;
-        }
-        $self->cmd_parse("\e[8;$nrow;t\e[3;$self->{x};${y}t");
+    # We find out, how many new rows are added and resize accordingly.
+    # For this, we split the string into individual lines and determine, how
+    # many rows it will take to display.
+    my @lines = split(/\n/, $string);
+    my ($y, $x) = $self->screen_cur;
+    print "splittet into " . int(@lines) . " lines\n";
+    my $nl = 0;
+    for my $line (@lines) {
+        my $w = $x + $self->strwidth($line);
+        $x = 0;
+        $nl += ceil((1.0 * $w) / $self->ncol);
+    }
+
+    my $nrow = $self->nrow;
+    print "resizing to $nrow + $nl\n";
+    $nrow += $nl;
+
+    # If the window is supposed to be at the bottom, we have to move the
+    # window up a little bit
+    my $y = $self->{y};
+    if ($self->{bottom}) {
+        $y -= 2+$nrow*$self->fheight;
     }
+    $self->cmd_parse("\e[8;$nrow;t\e[3;$self->{x};${y}t");
     ();
 }
 
-- 
1.8.4.rc3