runtime(syntax-tests): Allow for folded and wrapped lines in syntax test files
The current implementation falls short for syntax test files
on two accounts:
1. With folded lines -- some lines before folded lines are
unnecessarily repeated in generated dump files because
closed folded lines are always treated as opened for the
cursor to move _in_ instead of to move _over_ them.
2. With wrapped lines (longer than 75 columns) -- some lines
are omitted in generated dump files because calculations
for the cursor progress and its movement commands only
refer to file lines and not their layout within a 20x75
buffer (less &cmdheight).
As an alternative, we abandon deterministic (and inaccurate
at times) calculations for the cursor progress and, instead,
advance the cursor by as much as before for a single dump
file, but now rely on marking the last visible line and
additional movement to position lines at desired offsets,
carefully preserving compatibility for the &scrolloff and
&ruler values inherited from defaults.vim. The parent Vim
process will keep track of progress through a syntax test
file made by its child process ("terminal") by reading the
rightmost end of the ruler line from the terminal buffer,
looking for " All " or " Bot " for its cue to finish dump
file generation.
With these changes applied, the lossless line length limit
will be raised from 75 to 1425 (for a 19x75 view) columns.
Also, prefer "lastline" to "truncate" for &display; hiding
the content of any last _long_ line in a view goes against
the purpose of syntax file testing -- all lines should be
recorded.
related: #15150
fixes: #14245
Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/testdir/dumps/html_01.dump b/runtime/syntax/testdir/dumps/html_01.dump
index 48b11e6..dbc1969 100644
--- a/runtime/syntax/testdir/dumps/html_01.dump
+++ b/runtime/syntax/testdir/dumps/html_01.dump
@@ -1,9 +1,11 @@
-|<+0#00e0e07#ffffff0|a+0#af5f00255&|b@1|r|>+0#00e0e07&|<|/|a+0#af5f00255&|b@1|r|>+0#00e0e07&| +0#0000000&@61
+|<+0#0000e05#ffffff0|!|-@1| |H|T|M|L| |E|l|e|m|e|n|t|s| |-@1|>| +0#0000000&@52
+|<+0#00e0e07&|a+0#af5f00255&|>+0#00e0e07&|<|/|a+0#af5f00255&|>+0#00e0e07&| +0#0000000&@67
+|<+0#00e0e07&|a+0#af5f00255&|b@1|r|>+0#00e0e07&|<|/|a+0#af5f00255&|b@1|r|>+0#00e0e07&| +0#0000000&@61
|<+0#00e0e07&|a+0#af5f00255&|d@1|r|e|s@1|>+0#00e0e07&|<|/|a+0#af5f00255&|d@1|r|e|s@1|>+0#00e0e07&| +0#0000000&@55
|<+0#00e0e07&|a+0#af5f00255&|r|e|a|>+0#00e0e07&| +0#0000000&@68
-|<+0#00e0e07&|a+0#af5f00255&|r|t|i|c|l|e|>+0#00e0e07&|<|/|a+0#af5f00255&|r|t|i|c|l|e|>+0#00e0e07&| +0#0000000&@55
+><+0#00e0e07&|a+0#af5f00255&|r|t|i|c|l|e|>+0#00e0e07&|<|/|a+0#af5f00255&|r|t|i|c|l|e|>+0#00e0e07&| +0#0000000&@55
|<+0#00e0e07&|a+0#af5f00255&|s|i|d|e|>+0#00e0e07&|<|/|a+0#af5f00255&|s|i|d|e|>+0#00e0e07&| +0#0000000&@59
-><+0#00e0e07&|a+0#af5f00255&|u|d|i|o|>+0#00e0e07&|<|/|a+0#af5f00255&|u|d|i|o|>+0#00e0e07&| +0#0000000&@59
+|<+0#00e0e07&|a+0#af5f00255&|u|d|i|o|>+0#00e0e07&|<|/|a+0#af5f00255&|u|d|i|o|>+0#00e0e07&| +0#0000000&@59
|<+0#00e0e07&|b+0#af5f00255&|>+0#00e0e07&|b+0#0000000&|r|i|n|g| |a|t@1|e|n|t|i|o|n| |t|o|<+0#00e0e07&|/|b+0#af5f00255&|>+0#00e0e07&| +0#0000000&@49
|<+0#00e0e07&|b+0#af5f00255&|a|s|e|>+0#00e0e07&| +0#0000000&@68
|<+0#00e0e07&|b+0#af5f00255&|d|i|>+0#00e0e07&|<|/|b+0#af5f00255&|d|i|>+0#00e0e07&| +0#0000000&@63
@@ -15,6 +17,4 @@
|<+0#00e0e07&|c+0#af5f00255&|a|n|v|a|s|>+0#00e0e07&|<|/|c+0#af5f00255&|a|n|v|a|s|>+0#00e0e07&| +0#0000000&@57
|<+0#00e0e07&|c+0#af5f00255&|a|p|t|i|o|n|>+0#00e0e07&|<|/|c+0#af5f00255&|a|p|t|i|o|n|>+0#00e0e07&| +0#0000000&@55
|<+0#00e0e07&|c+0#af5f00255&|i|t|e|>+0#00e0e07&|<|/|c+0#af5f00255&|i|t|e|>+0#00e0e07&| +0#0000000&@61
-|<+0#00e0e07&|c+0#af5f00255&|o|d|e|>+0#00e0e07&|<|/|c+0#af5f00255&|o|d|e|>+0#00e0e07&| +0#0000000&@61
-|<+0#00e0e07&|c+0#af5f00255&|o|l|>+0#00e0e07&| +0#0000000&@69
-@57|1|9|,|1| @10|9|%|
+@57|1|7|,|1| @10|8|%|