patch 9.0.1543: display errors when making topline shorter

Problem:    Display errors when making topline shorter and 'smoothscroll' is
            set.
Solution:   Reset w_skipcol when the topline becomes shorter than its current
            value. (Luuk van Baal, closes #12367)

diff --git a/src/change.c b/src/change.c
index e5798c54a464b04456012efcdfff6366d99c452e..8bb61ed1480e956c17bb0669c5b77de049017ab4 100644 (file)
--- a/src/change.c
+++ b/src/change.c
@@ -553,13 +553,25 @@ changed_common(
     {
        if (wp->w_buffer == curbuf)
        {
-#ifdef FEAT_FOLDING
            linenr_T last = lnume + xtra - 1;  // last line after the change
-#endif
+
            // Mark this window to be redrawn later.
            if (!redraw_not_allowed && wp->w_redr_type < UPD_VALID)
                wp->w_redr_type = UPD_VALID;
 
+           // Reset "w_skipcol" if the topline length has become smaller to
+           // such a degree that nothing will be visible anymore, accounting
+           // for 'smoothscroll' <<< or 'listchars' "precedes" marker.
+           if (wp->w_skipcol > 0
+                   && (last < wp->w_topline
+                       || (wp->w_topline >= lnum
+                           && wp->w_topline < lnume
+                           && win_linetabsize(wp, wp->w_topline,
+                                       ml_get(wp->w_topline), (colnr_T)MAXCOL)
+                                   <= wp->w_skipcol + (wp->w_p_list
+                                           && wp->w_lcs_chars.prec ? 1 : 3))))
+               wp->w_skipcol = 0;
+
            // Check if a change in the buffer has invalidated the cached
            // values for the cursor.
 #ifdef FEAT_FOLDING

diff --git a/src/testdir/dumps/Test_display_long_line_1.dump b/src/testdir/dumps/Test_display_long_line_1.dump
index 691f358e9b14d993a8923cacd9a266455d97dc83..f2be2aa41280a62f9a05200e5e5daab67deecac8 100644 (file)
--- a/src/testdir/dumps/Test_display_long_line_1.dump
+++ b/src/testdir/dumps/Test_display_long_line_1.dump
@@ -9,6 +9,6 @@
 @35
 @35
 @35
-@26>a@8
-@10| @24
-@18|1|,|4|8|2| @7|T|o|p| 
+@35
+>a@14| @19
+@18|1|,|7|3|6| @7|T|o|p| 

diff --git a/src/testdir/dumps/Test_display_long_line_2.dump b/src/testdir/dumps/Test_display_long_line_2.dump
index dcf6e275bd4775d22e12d7c309c52bf48d905a30..25b5e89786f63e89ea1cbf5604eb4797b02cb185 100644 (file)
--- a/src/testdir/dumps/Test_display_long_line_2.dump
+++ b/src/testdir/dumps/Test_display_long_line_2.dump
@@ -9,6 +9,6 @@
 @35
 @35
 @35
-@25>a| @8
+@34>a
 |b@4| |b@4| |b@4| |b@4| |b@4| |b@1|@+0#4040ff13&@2
-| +0#0000000&@17|1|,|4|8|1| @7|T|o|p| 
+| +0#0000000&@17|1|,|7|3|5| @7|T|o|p| 

diff --git a/src/testdir/dumps/Test_display_long_line_3.dump b/src/testdir/dumps/Test_display_long_line_3.dump
new file mode 100644 (file)
index 0000000..7f8c173
--- /dev/null
+++ b/src/testdir/dumps/Test_display_long_line_3.dump
@@ -0,0 +1,14 @@
+|<+0#4040ff13#ffffff0@2>a+0#0000000&| @30
+|b@4| |b@4| |b@4| |b@4| |b@4| |b@4
+| |b@4| |c@4| |c@4| |c@4| |c@4| |c@3
+@1| |c@4| |c@4| |d@4| |d@4| |d@4| |d@2
+@2| |d@4| |d@4| |d@4| @14
+|~+0#4040ff13&| @33
+|~| @33
+|~| @33
+|~| @33
+|~| @33
+|~| @33
+|~| @33
+|~| @33
+| +0#0000000&@17|1|,|3|1|9| @7|A|l@1| 

diff --git a/src/testdir/dumps/Test_display_long_line_4.dump b/src/testdir/dumps/Test_display_long_line_4.dump
new file mode 100644 (file)
index 0000000..8bdb4d5
--- /dev/null
+++ b/src/testdir/dumps/Test_display_long_line_4.dump
@@ -0,0 +1,14 @@
+|a+0&#ffffff0@34
+@35
+@35
+@35
+@35
+@35
+@35
+@35
+@35
+@2>a| @31
+|b@4| |b@4| |b@4| |b@4| |b@4| |b@4
+| |b@4| |c@4| |c@4| |c@4| |c@4| |c@3
+@1| |c@4| |c@4| |d@4| |d@4| |d@4| |@+0#4040ff13&@2
+| +0#0000000&@17|1|,|3|1|8| @7|T|o|p| 

diff --git a/src/testdir/dumps/Test_smooth_long_15.dump b/src/testdir/dumps/Test_smooth_long_15.dump
index b82fca5994d9b34603ed785a2750ba63fa4525c5..7f5bff746cfc0c0c36689f58879a25c8015a2acc 100644 (file)
--- a/src/testdir/dumps/Test_smooth_long_15.dump
+++ b/src/testdir/dumps/Test_smooth_long_15.dump
@@ -2,5 +2,5 @@
 |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| 
+>f|o|u|r| @35
+@22|4|,|1| @10|B|o|t| 

diff --git a/src/testdir/dumps/Test_smooth_long_16.dump b/src/testdir/dumps/Test_smooth_long_16.dump
new file mode 100644 (file)
index 0000000..b82fca5
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_16.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/test_display.vim b/src/testdir/test_display.vim
index 5b08e84e31ad51d9b046d5f9d82efbc4ee498693..1332ab55e8db7486f7f3d8a2630fb5984faa1ccc 100644 (file)
--- a/src/testdir/test_display.vim
+++ b/src/testdir/test_display.vim
@@ -471,9 +471,9 @@ func Test_display_long_lastline()
   CheckScreendump
 
   let lines =<< trim END
-    set display=lastline
+    set display=lastline smoothscroll scrolloff=0
     call setline(1, [
-      \'aaaaa'->repeat(100),
+      \'aaaaa'->repeat(150),
       \'bbbbb '->repeat(7) .. 'ccccc '->repeat(7) .. 'ddddd '->repeat(7)
     \])
   END
@@ -481,11 +481,23 @@ func Test_display_long_lastline()
   call writefile(lines, 'XdispLongline', 'D')
   let buf = RunVimInTerminal('-S XdispLongline', #{rows: 14, cols: 35})
 
-  call term_sendkeys(buf, "482|")
+  call term_sendkeys(buf, "736|")
   call VerifyScreenDump(buf, 'Test_display_long_line_1', {})
+
+  " The correct part of the last line is moved into view.
   call term_sendkeys(buf, "D")
   call VerifyScreenDump(buf, 'Test_display_long_line_2', {})
 
+  " "w_skipcol" does not change because the topline is still long enough
+  " to maintain the current skipcol.
+  call term_sendkeys(buf, "g04l11gkD")
+  call VerifyScreenDump(buf, 'Test_display_long_line_3', {})
+
+  " "w_skipcol" is reset to bring the entire topline into view because
+  " the line length is now smaller than the current skipcol + marker.
+  call term_sendkeys(buf, "x")
+  call VerifyScreenDump(buf, 'Test_display_long_line_4', {})
+
   call StopVimInTerminal(buf)
 endfunc
 

diff --git a/src/testdir/test_scroll_opt.vim b/src/testdir/test_scroll_opt.vim
index 62469def1be544809e4b2cf7cce561bcdf1a9642..c12da9786bde5c3c5620a0cfd6710ed3cb4a380b 100644 (file)
--- a/src/testdir/test_scroll_opt.vim
+++ b/src/testdir/test_scroll_opt.vim
@@ -335,9 +335,12 @@ func Test_smoothscroll_wrap_long_line()
   " than one window. Note that the cursor is at the bottom this time because
   " Vim prefers to do so if we are scrolling a few lines only.
   call term_sendkeys(buf, ":call setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(10)) .. ' end', 'four'])\<CR>")
+  " Currently visible lines were replaced, test that the lines and cursor
+  " are correctly displayed.
+  call VerifyScreenDump(buf, 'Test_smooth_long_14', {})
   call term_sendkeys(buf, "3Gzt")
   call term_sendkeys(buf, "j")
-  call VerifyScreenDump(buf, 'Test_smooth_long_14', {})
+  call VerifyScreenDump(buf, 'Test_smooth_long_15', {})
 
   " Repeat the step but this time start it when the line is smooth-scrolled by
   " one line. This tests that the offset calculation is still correct and
@@ -345,7 +348,7 @@ func Test_smoothscroll_wrap_long_line()
   " screen.
   call term_sendkeys(buf, "3Gzt")
   call term_sendkeys(buf, "\<C-E>j")
-  call VerifyScreenDump(buf, 'Test_smooth_long_15', {})
+  call VerifyScreenDump(buf, 'Test_smooth_long_16', {})
 
   call StopVimInTerminal(buf)
 endfunc

diff --git a/src/version.c b/src/version.c
index 4c70def7626c2840da9778be582182ee7dca50fc..dd6baa9c2e4c81d363ddf5c6ef60ef6491d99b81 100644 (file)
--- a/src/version.c
+++ b/src/version.c
@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1543,
 /**/
     1542,
 /**/