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printer: support previews for long lines

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This commit adds support for showing a preview of long lines. While the
default still remains as completely suppressing the entire line, this
new functionality will show the first N graphemes of a matching line,
including the number of matches that are suppressed.

This was unfortunately a fairly invasive change to the printer that
required a bit of refactoring. On the bright side, the single line
and multi-line coloring are now more unified than they were before.

Closes #1078
This commit is contained in:
Andrew Gallant
2019-04-13 18:35:24 -04:00
parent a7d26c8f14
commit ece1f50cfe
8 changed files with 520 additions and 111 deletions
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3
GUIDE.md
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@@ -538,8 +538,9 @@ formatting peculiarities:
```
$ cat $HOME/.ripgreprc
# Don't let ripgrep vomit really long lines to my terminal.
# Don't let ripgrep vomit really long lines to my terminal, and show a preview.
--max-columns=150
--max-column-preview
# Add my 'web' type.
--type-add