patch 9.0.1121: cursor positioning and display problems with 'smoothscroll'v9.0.1121

Problem:    Cursor positioning and display problems with 'smoothscroll' and
            using "zt", "zb" or "zz".
Solution:   Adjust computations and conditions. (Yee Cheng Chin,
            closes #11764)

8 files changed, 29 insertions, 11 deletions

diff --git a/src/testdir/dumps/Test_smooth_long_10.dump b/src/testdir/dumps/Test_smooth_long_10.dump
index a7aee24f38..10634be6c9 100644
--- a/src/testdir/dumps/Test_smooth_long_10.dump
+++ b/src/testdir/dumps/Test_smooth_long_10.dump
@@ -1,6 +1,6 @@
->f+0&#ffffff0|o|u|r| @35
+|<+0#4040ff13#ffffff0@2|o+0#0000000&|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |e|n|d| @11
+>f|o|u|r| @35
 |~+0#4040ff13&| @38
 |~| @38
-|~| @38
-|~| @38
 |:+0#0000000&|s|e|t| |s|c|r|o|l@1|o| @9|4|,|1| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_11.dump b/src/testdir/dumps/Test_smooth_long_11.dump
index 7f5bff746c..0aa7a4bee2 100644
--- a/src/testdir/dumps/Test_smooth_long_11.dump
+++ b/src/testdir/dumps/Test_smooth_long_11.dump
@@ -3,4 +3,4 @@
 |t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
 |f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |e|n|d| @11
 >f|o|u|r| @35
-@22|4|,|1| @10|B|o|t| 
+|:|s|e|t| |s|c|r|o|l@1|o| @9|4|,|1| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_12.dump b/src/testdir/dumps/Test_smooth_long_12.dump
index b82fca5994..10634be6c9 100644
--- a/src/testdir/dumps/Test_smooth_long_12.dump
+++ b/src/testdir/dumps/Test_smooth_long_12.dump
@@ -1,6 +1,6 @@
-|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
-|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
-|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|<+0#4040ff13#ffffff0@2|o+0#0000000&|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
 |f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |e|n|d| @11
-|f|o|u>r| @35
-@22|4|,|4| @10|B|o|t| 
+>f|o|u|r| @35
+|~+0#4040ff13&| @38
+|~| @38
+|:+0#0000000&|s|e|t| |s|c|r|o|l@1|o| @9|4|,|1| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_13.dump b/src/testdir/dumps/Test_smooth_long_13.dump
new file mode 100644
index 0000000000..62d7992820
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_13.dump
@@ -0,0 +1,6 @@
+>f+0&#ffffff0|o|u|r| @35
+|~+0#4040ff13&| @38
+|~| @38
+|~| @38
+|~| @38
+| +0#0000000&@21|4|,|1| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_14.dump b/src/testdir/dumps/Test_smooth_long_14.dump
new file mode 100644
index 0000000000..7f5bff746c
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_14.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |e|n|d| @11
+>f|o|u|r| @35
+@22|4|,|1| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_15.dump b/src/testdir/dumps/Test_smooth_long_15.dump
new file mode 100644
index 0000000000..b82fca5994
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_15.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |e|n|d| @11
+|f|o|u>r| @35
+@22|4|,|4| @10|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_8.dump b/src/testdir/dumps/Test_smooth_long_8.dump
index f4687be513..6d2f13c2a5 100644
--- a/src/testdir/dumps/Test_smooth_long_8.dump
+++ b/src/testdir/dumps/Test_smooth_long_8.dump
@@ -3,4 +3,4 @@
 |t|s| |o|f| |t|e|x>t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
 |f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
 |x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
-|:|s|e|t| |s|c|r|o|l@1|o| @9|3|,|1|3|0| @8|6@1|%| 
+| @21|3|,|1|3|0| @8|6@1|%| 
diff --git a/src/testdir/dumps/Test_smooth_long_9.dump b/src/testdir/dumps/Test_smooth_long_9.dump
index f4687be513..6d2f13c2a5 100644
--- a/src/testdir/dumps/Test_smooth_long_9.dump
+++ b/src/testdir/dumps/Test_smooth_long_9.dump
@@ -3,4 +3,4 @@
 |t|s| |o|f| |t|e|x>t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
 |f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
 |x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
-|:|s|e|t| |s|c|r|o|l@1|o| @9|3|,|1|3|0| @8|6@1|%| 
+| @21|3|,|1|3|0| @8|6@1|%|