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mirror of https://github.com/vim/vim.git synced 2025-08-26 20:03:41 -04:00
Aliaksei Budavei 8418446644
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>
2024-07-06 11:56:31 +02:00
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This directory contains Vim scripts for syntax highlighting.

These scripts are not for a language, but are used by Vim itself:

syntax.vim	Used for the ":syntax on" command.  Uses synload.vim.

manual.vim	Used for the ":syntax manual" command.  Uses synload.vim.

synload.vim	Contains autocommands to load a language file when a certain
		file name (extension) is used.  And sets up the Syntax menu
		for the GUI.

nosyntax.vim	Used for the ":syntax off" command.  Undo the loading of
		synload.vim.

The "shared" directory contains generated files and what is used by more than
one syntax.


A few special files:

2html.vim	Converts any highlighted file to HTML (GUI only).
colortest.vim	Check for color names and actual color on screen.
hitest.vim	View the current highlight settings.
whitespace.vim  View Tabs and Spaces.


If you want to write a syntax file, read the docs at ":help usr_44.txt".

If you make a new syntax file which would be useful for others, please send it
to the vim-dev mailing list <vim-dev@vim.org>.  Include instructions for
detecting the file type for this language, by file name extension or by
checking a few lines in the file. And please write the file in a portable way,
see ":help 44.12".

If you have remarks about an existing file, send them to the maintainer of
that file.  Only when you get no response send a message to the vim-dev
mailing list: <vim-dev@vim.org>.

If you are the maintainer of a syntax file and make improvements, send the new
version to the vim-dev mailing list: <vim-dev@vim.org>

For further info see ":help syntax" in Vim.