patch 9.0.1141: 'cursorcolumn' and 'colorcolumn' wrong after concealingv9.0.1141

Problem:    'cursorcolumn' and 'colorcolumn' wrong after concealing and
            wrapping line.
Solution:   Reset "wlv.vcol_off" after each screen line. (Alexey Radkov,
            closes #11777)

3 files changed, 52 insertions, 0 deletions

diff --git a/src/testdir/dumps/Test_conceal_cuc_01.dump b/src/testdir/dumps/Test_conceal_cuc_01.dump
new file mode 100644
index 0000000000..bf4281999c
--- /dev/null
+++ b/src/testdir/dumps/Test_conceal_cuc_01.dump
@@ -0,0 +1,10 @@
+|o+0&#ffffff0|n|e| |o|n|e| |o|n|e| @1|o|n|e| |o|n|e| |o|n|e| |o+0&#e0e0e08|n+0&#ffffff0|e| @11
+| +0#4040ff13&|>@2| |o+0#0000000&|n|e| |o+0&#ffd7d7255|n+0&#ffffff0|e| |o|n|e| |o|n|e| @19
+|t|w|o| |t|w|o| |t|w|o| |t|w|o| |||h|i|d@1|e|n||| >h|e|r|e| |t|w|o| |t|w|o| @2
+|t|h|r|e@1| @1|t|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| |t+0&#e0e0e08|h+0&#ffffff0|r|e@1| @9
+| +0#4040ff13&|>@2| |t+0#0000000&|h|r|e|e+0&#ffd7d7255| +0&#ffffff0|t|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| @11
+|~+0#4040ff13&| @38
+|~| @38
+|~| @38
+|~| @38
+|/+0#0000000&|h|e|r|e| @16|2|,|2|6| @9|A|l@1| 
diff --git a/src/testdir/dumps/Test_conceal_cuc_02.dump b/src/testdir/dumps/Test_conceal_cuc_02.dump
new file mode 100644
index 0000000000..1b6662e985
--- /dev/null
+++ b/src/testdir/dumps/Test_conceal_cuc_02.dump
@@ -0,0 +1,10 @@
+|o+0&#ffffff0|n|e| |o|n|e| |o|n|e| @1|o|n|e| |o|n|e| |o|n|e| |o|n|e| @11
+| +0#4040ff13&|>@2| |o+0#0000000&|n|e| |o+0&#ffd7d7255|n+0&#ffffff0|e| |o|n|e| |o|n|e| @19
+|t|w|o| |t|w|o| |t|w|o| |t|w|o| |||h|i|d@1|e|n||| |h|e|r|e| |t|w|o| |t|w>o| @2
+|t|h|r|e@1| @1|t|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| @9
+| +0#4040ff13&|>@2| |t+0#0000000&|h|r|e|e+0&#ffd7d7255| +0&#ffffff0|t|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| @11
+|~+0#4040ff13&| @38
+|~| @38
+|~| @38
+|~| @38
+|/+0#0000000&|h|e|r|e| @16|2|,|3|7| @9|A|l@1| 
diff --git a/src/testdir/test_conceal.vim b/src/testdir/test_conceal.vim
index 385d42b544..d9a7644118 100644
--- a/src/testdir/test_conceal.vim
+++ b/src/testdir/test_conceal.vim
@@ -139,6 +139,38 @@ func Test_conceal_with_cursorline()
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_conceal_with_cursorcolumn()
+  CheckScreendump
+
+  " Check that cursorcolumn and colorcolumn don't get broken in presence of
+  " wrapped lines containing concealed text
+  let code =<< trim [CODE]
+    let lines = ["one one one |hidden| one one one one one one one one",
+          \ "two two two two |hidden| here two two",
+          \ "three |hidden| three three three three three three three three"]
+    call setline(1, lines)
+    set wrap linebreak
+    set showbreak=\ >>>\ 
+    syntax match test /|hidden|/ conceal
+    set conceallevel=2
+    set concealcursor=
+    exe "normal /here\r"
+    set cursorcolumn
+    set colorcolumn=50
+  [CODE]
+
+  call writefile(code, 'XTest_conceal_cuc', 'D')
+  let buf = RunVimInTerminal('-S XTest_conceal_cuc', {'rows': 10, 'cols': 40})
+  call VerifyScreenDump(buf, 'Test_conceal_cuc_01', {})
+
+  " move cursor to the end of line (the cursor jumps to the next screen line)
+  call term_sendkeys(buf, "$")
+  call VerifyScreenDump(buf, 'Test_conceal_cuc_02', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+endfunc
+
 func Test_conceal_resize_term()
   CheckScreendump