diff --git a/src/cli.rs b/src/cli.rs index a21918f72..44a0778e7 100644 --- a/src/cli.rs +++ b/src/cli.rs @@ -734,12 +734,22 @@ pub struct Opt { /// insertion operations transforming one into the other. pub max_line_distance: f64, - #[arg(long = "max-line-length", default_value = "512", value_name = "N")] + #[arg( + long = "max-syntax-highlighting-length", + default_value = "400", + value_name = "N" + )] + /// Stop syntax highlighting lines after this many characters. + /// + /// To always highlighting entire lines set to zero - but note that delta will be slow on very + /// long lines (e.g. minified .js). + pub max_syntax_length: usize, + + #[arg(long = "max-line-length", default_value = "3000", value_name = "N")] /// Truncate lines longer than this. /// - /// To prevent any truncation, set to zero. Note that delta will be slow on very long lines - /// (e.g. minified .js) if truncation is disabled. When wrapping lines it is automatically set - /// to fit at least all visible characters. + /// To prevent any truncation, set to zero. When wrapping lines this does nothing as it is + /// overwritten to fit at least all visible characters, see `--wrap-max-lines`. pub max_line_length: usize, #[arg( diff --git a/src/config.rs b/src/config.rs index 351d57d4c..c2fbccb73 100644 --- a/src/config.rs +++ b/src/config.rs @@ -101,6 +101,7 @@ pub struct Config { pub max_line_distance_for_naively_paired_lines: f64, pub max_line_distance: f64, pub max_line_length: usize, + pub max_syntax_length: usize, pub merge_conflict_begin_symbol: String, pub merge_conflict_ours_diff_header_style: Style, pub merge_conflict_theirs_diff_header_style: Style, @@ -392,6 +393,7 @@ impl From for Config { } else { opt.max_line_length }, + max_syntax_length: opt.max_syntax_length, merge_conflict_begin_symbol: opt.merge_conflict_begin_symbol, merge_conflict_ours_diff_header_style: styles["merge-conflict-ours-diff-header-style"], merge_conflict_theirs_diff_header_style: styles diff --git a/src/options/set.rs b/src/options/set.rs index 8677d158f..2fae345bf 100644 --- a/src/options/set.rs +++ b/src/options/set.rs @@ -174,6 +174,7 @@ pub fn set_options( map_styles, max_line_distance, max_line_length, + max_syntax_length, // Hack: minus-style must come before minus-*emph-style because the latter default // dynamically to the value of the former. merge_conflict_begin_symbol, diff --git a/src/paint.rs b/src/paint.rs index 4b487ea38..aaa53e50a 100644 --- a/src/paint.rs +++ b/src/paint.rs @@ -696,11 +696,40 @@ pub fn get_syntax_style_sections_for_lines<'a>( ) { (Some(highlighter), true) => { for (line, _) in lines.iter() { - line_sections.push( - highlighter - .highlight_line(line, &config.syntax_set) - .unwrap(), - ); + // Fast but simple length comparison. Overcounts non-printable ansi + // characters or wider UTF-8, but `truncate_str_short` in the + // else branch corrects that. + if line.len() < config.max_syntax_length || config.max_syntax_length == 0 { + line_sections.push( + highlighter + .highlight_line(line, &config.syntax_set) + .unwrap(), + ); + } else { + let line_syntax = ansi::truncate_str_short(line, config.max_syntax_length); + // Re-split to get references into `line` with correct lifetimes. + // SAFETY: slicing the string is safe because `truncate_str_short` always + // returns a prefix of the input and only cuts at grapheme borders. + let (with_syntax, plain) = line.split_at(line_syntax.len()); + // Note: splitting a line and only feeding one half to the highlighter may + // result in wrong highlighting until it is reset the next hunk. + // + // Also, as lines are no longer newline terminated they might not be + // highlighted correctly, and because of lifetimes inserting '\n' here is not + // possible, also see `prepare()`. + line_sections.push( + highlighter + .highlight_line(with_syntax, &config.syntax_set) + .unwrap(), + ); + + if !plain.is_empty() { + line_sections + .last_mut() + .unwrap() + .push((config.null_syntect_style, plain)); + } + } } } _ => { diff --git a/src/tests/test_example_diffs.rs b/src/tests/test_example_diffs.rs index 9ee3ca5bb..c91c8bd52 100644 --- a/src/tests/test_example_diffs.rs +++ b/src/tests/test_example_diffs.rs @@ -1994,6 +1994,149 @@ src/align.rs:71: impl<'a> Alignment<'a> { │ .expect_after_header("#partial\n\nremoved: a"); } + #[test] + fn test_lines_with_syntax_width_limit() { + let result = DeltaTest::with_args(&[ + "--max-line-length=42", + "--max-syntax-highlighting-length=18", + ]) + .explain_ansi() + .with_input(GIT_DIFF_SINGLE_HUNK); + assert_snapshot!(result.output, @r###" + (normal)commit 94907c0f136f46dc46ffae2dc92dca9af7(reverse normal)→(normal) + Author: Dan Davison (149)Alignmen(normal)t<'a> { (blue)│(normal) + (blue)─────────────────────────────(blue)┘(normal) + + (231) (203)for(231) (i, x_(normal)i) in self.x.iter().en→ + (231) (203)for(231) (j(normal), y_j) in self.y.iter(→ + (normal 52) let (left, diag, up) =(normal 124) ((normal) + (normal 52) self.index(i, j + 1(normal 124)),(normal) + (normal 52) self.index(i, j),(normal) + (normal 52) self.index(i + 1, j),(normal) + (normal 52) );(normal) + (231 22) le(normal 22)t (left, diag, up) =(normal) + (231 22) (normal 22) (normal 28)((normal 22)self.index(i, j + 1(normal 28)→(normal) + (231) le(normal)t candidates = [ + (231) (normal) Cell { + (231) (normal) parent: left, + "###); + } + + #[test] + fn test_lines_with_syntax_width_limit_wrapping() { + let result = DeltaTest::with_args(&[ + "--side-by-side", + "--width=55", + "--wrap-max-lines=1", + "--max-line-length=10", // this gets ignored! + "--max-syntax-highlighting-length=22", + ]) + .explain_ansi() + .with_input(GIT_DIFF_SINGLE_HUNK); + + // eprintln!("{}", result.raw_output); + assert_snapshot!(result.output, @r###" + (normal)commit 94907c0f136f46dc46ffae2dc92dca9af7eb7c2e + Author: Dan Davison + Date: Thu May 14 11:13:17 2020 -0400 + + rustfmt + + + (blue)src/align.rs(normal) + (blue)───────────────────────────────────────────────────────(normal) + + (blue)─────────────────────────────(blue)┐(normal) + (blue)71(normal):(231) (81)impl(231)<(203)'a(231)> (149)Alignment(231)<(203)'a(normal)> { (blue)│(normal) + (blue)─────────────────────────────(blue)┘(normal) + + (blue)│(238) 71 (blue)│(231) (203)for(231) (i, x_i)(blue)↵(blue) │(238) 71 (blue)│(231) (203)for(231) (i, x_i)(blue)↵(normal) + (blue)│(238) (blue)│(231) i(normal)n self.x.iter().en(reverse normal)→(blue) │(238) (blue)│(231) i(normal)n self.x.iter().en(reverse normal)→(normal) + (blue)│(238) 72 (blue)│(231) (203)for(231) (j, (blue)↵(blue) │(238) 72 (blue)│(231) (203)for(231) (j, (blue)↵(normal) + (blue)│(238) (blue)│(231)y_(normal)j) in self.y.iter((reverse normal)→(blue) │(238) (blue)│(231)y_(normal)j) in self.y.iter((reverse normal)→(normal) + (blue)│(88) 73 (blue)│(231 52) (81)let(231) (blue)↵(blue) │(28) 73 (blue)│(231 22) (81)let(231) (blue)↵(normal) + (blue)│(88) (blue)│(231 52)(l(normal 52)eft, diag, up) =(normal 124) ((normal 52) (blue) │(28) (blue)│(231 22)(l(normal 22)eft, diag, up) =(normal) + (blue)│(88) 74 (blue)│(231 52) (blue)↵(blue) │(28) 74 (blue)│(231 22) (blue)↵(normal) + (blue)│(88) (blue)│(231 52)se(normal 52)lf.index(i, j + 1),(blue) │(28) (blue)│(231 28)((normal 22)s(normal 22)elf.index(i, j + 1(reverse normal)→(normal) + (blue)│(88) 75 (blue)│(231 52) (blue)↵(blue) │(28) (blue)│(normal) + (blue)│(88) (blue)│(231 52)se(normal 52)lf.index(i, j),(normal 52) (blue) │(28) (blue)│(normal) + (blue)│(88) 76 (blue)│(231 52) (blue)↵(blue) │(28) (blue)│(normal) + (blue)│(88) (blue)│(231 52)se(normal 52)lf.index(i + 1, j),(blue) │(28) (blue)│(normal) + (blue)│(88) 77 (blue)│(231 52) );(normal 52) (blue) │(28) (blue)│(normal) + (blue)│(238) 78 (blue)│(231) (81)let(231) (blue)↵(blue) │(238) 75 (blue)│(231) (81)let(231) (blue)↵(normal) + (blue)│(238) (blue)│(231)ca(normal)ndidates = [ (blue) │(238) (blue)│(231)ca(normal)ndidates = [ + (blue)│(238) 79 (blue)│(231) (blue)↵(blue) │(238) 76 (blue)│(231) (blue)↵(normal) + (blue)│(238) (blue)│(231)Ce(normal)ll { (blue) │(238) (blue)│(231)Ce(normal)ll { + (blue)│(238) 80 (blue)│(231) (blue)↵(blue) │(238) 77 (blue)│(231) (blue)↵(normal) + (blue)│(238) (blue)│(231) (normal) parent: left, (blue) │(238) (blue)│(231) (normal) parent: left, + "###); + } + + #[test] + fn test_lines_with_syntax_width_unicode() { + let result = DeltaTest::with_args(&["--max-syntax-highlighting-length=11"]) + .explain_ansi() + .with_input(GIT_DIFF_ALL_UNICODE_W_FULLWIDTH); + + assert_snapshot!(result.output, @r###" + (normal) + + (blue)src/a(normal) + (blue)───────────────────────────────────────────(normal) + + (blue)───(blue)┐(normal) + (blue)1(normal): (blue)│(normal) + (blue)───(blue)┘(normal) + (231)一æäöø€ÆÄÖ(normal)〇Øß一 + (231)一æäöø€ÆÄÖ(normal)〇Øß一 + (normal 52)二æäöø(normal 124)¢(normal 52)ÆÄÖ〇Øß二(normal) + (normal 52)二æäöø(normal 124)¢(normal 52)ÆÄÖ〇Øß二(normal) + (231 22)二æäöø(normal 28)€(normal 22)ÆÄÖ(normal 22)〇Øß二(normal) + (231 22)二æäöø(normal 28)€(normal 22)ÆÄÖ(normal 22)〇Øß二(normal) + (231)三æäöø€ÆÄÖ(normal)〇Øß三 + (231)三æäöø€ÆÄÖ(normal)〇Øß三 + (231)¶(normal) + "###); + + let result = DeltaTest::with_args(&[ + "--max-syntax-highlighting-length=10", + "--max-line-length=16", + ]) + .explain_ansi() + .with_input(GIT_DIFF_ALL_UNICODE_W_FULLWIDTH); + + // eprintln!("{}", result.raw_output); + assert_snapshot!(result.output, @r###" + (normal) + + (blue)src/a(normal) + (blue)───────────────────────────────────────────(normal) + + (blue)───(blue)┐(normal) + (blue)1(normal): (blue)│(normal) + (blue)───(blue)┘(normal) + (231)一æäöø€ÆÄÖ(normal)〇Øß→ + (231)一æäöø€ÆÄÖ(normal)〇Øß→ + (normal 52)二æäöø(normal 124)¢(normal 52)ÆÄÖ〇Øß→(normal) + (normal 52)二æäöø(normal 124)¢(normal 52)ÆÄÖ〇Øß→(normal) + (231 22)二æäöø(normal 28)€(normal 22)ÆÄÖ(normal 22)〇Øß→(normal) + (231 22)二æäöø(normal 28)€(normal 22)ÆÄÖ(normal 22)〇Øß→(normal) + (231)三æäöø€ÆÄÖ(normal)〇Øß→ + (231)三æäöø€ÆÄÖ(normal)〇Øß→ + (231)¶(normal) + "###); + } + const GIT_DIFF_SINGLE_HUNK: &str = "\ commit 94907c0f136f46dc46ffae2dc92dca9af7eb7c2e Author: Dan Davison @@ -2964,5 +3107,22 @@ Date: Tue Jun 21 14:48:20 2022 +0200 diff --git a a new file mode 100644 index 0000000..e69de29 +"; + + const GIT_DIFF_ALL_UNICODE_W_FULLWIDTH: &str = " +diff --git a/src/a b/src/a +index 53f98b6..14d6caa 100644 +--- a/src/a ++++ b/src/a +@@ -1,7 +1,7 @@ + 一æäöø€ÆÄÖ〇Øß一 + 一æäöø€ÆÄÖ〇Øß一 +-二æäöø¢ÆÄÖ〇Øß二 +-二æäöø¢ÆÄÖ〇Øß二 ++二æäöø€ÆÄÖ〇Øß二 ++二æäöø€ÆÄÖ〇Øß二 + 三æäöø€ÆÄÖ〇Øß三 + 三æäöø€ÆÄÖ〇Øß三 + ¶ "; }