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Simplified change newline handling

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This commit is contained in:
Armin Ronacher 2021-02-02 22:54:22 +01:00
parent 1991955c52
commit d4495038a3
8 changed files with 6 additions and 81 deletions
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27
src/text/inline.rs
View file

@ -99,7 +99,6 @@ pub struct InlineChange<'s, T: DiffableStr + ?Sized> {
old_index: Option<usize>,
new_index: Option<usize>,
values: Vec<(bool, &'s T)>,
missing_newline: bool,
}
impl<'s, T: DiffableStr + ?Sized> InlineChange<'s, T> {
@ -143,7 +142,7 @@ impl<'s, T: DiffableStr + ?Sized> InlineChange<'s, T> {
/// Returns `true` if this change needs to be followed up by a
/// missing newline.
pub fn missing_newline(&self) -> bool {
self.missing_newline
!self.values.last().map_or(true, |x| x.1.ends_with_newline())
}
}
@ -154,7 +153,6 @@ impl<'s, T: DiffableStr + ?Sized> From<Change<'s, T>> for InlineChange<'s, T> {
old_index: change.old_index(),
new_index: change.new_index(),
values: vec![(false, change.value())],
missing_newline: change.missing_newline(),
}
}
}
@ -169,7 +167,7 @@ impl<'s, T: DiffableStr + ?Sized> fmt::Display for InlineChange<'s, T> {
};
write!(f, "{}{}{}", marker, value, marker)?;
}
if self.missing_newline {
if self.missing_newline() {
writeln!(f)?;
}
Ok(())
@ -183,7 +181,6 @@ pub(crate) fn iter_inline_changes<'diff, T>(
where
T: DiffableStr + ?Sized,
{
let newline_terminated = diff.newline_terminated;
let (tag, old_range, new_range) = op.as_tag_tuple();
if let DiffTag::Equal | DiffTag::Insert | DiffTag::Delete = tag {
@ -264,40 +261,20 @@ where
old_index: Some(old_index),
new_index: None,
values,
missing_newline: false,
});
old_index += 1;
}
if newline_terminated
&& !old_slices.is_empty()
&& !old_slices[old_slices.len() - 1].ends_with_newline()
{
if let Some(last) = rv.last_mut() {
last.missing_newline = true;
}
}
for values in new_values {
rv.push(InlineChange {
tag: ChangeTag::Insert,
old_index: None,
new_index: Some(new_index),
values,
missing_newline: false,
});
new_index += 1;
}
if newline_terminated
&& !new_slices.is_empty()
&& !new_slices[new_slices.len() - 1].ends_with_newline()
{
if let Some(last) = rv.last_mut() {
last.missing_newline = true;
}
}
Box::new(rv.into_iter()) as Box<dyn Iterator<Item = _>>
}

16
src/text/mod.rs
View file

@ -374,7 +374,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
/// up the value from the appropriate slice and also handle correct index
/// handling.
pub fn iter_changes(&self, op: &DiffOp) -> impl Iterator<Item = Change<'_, T>> {
let newline_terminated = self.newline_terminated;
let (tag, old_range, new_range) = op.as_tag_tuple();
let mut old_index = old_range.start;
let mut new_index = new_range.start;
@ -392,9 +391,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
old_index: Some(old_index - 1),
new_index: Some(new_index - 1),
value: first,
missing_newline: newline_terminated
&& rest.is_empty()
&& !first.ends_with_newline(),
})
} else {
None
@ -409,9 +405,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
old_index: Some(old_index - 1),
new_index: None,
value: first,
missing_newline: newline_terminated
&& rest.is_empty()
&& !first.ends_with_newline(),
})
} else {
None
@ -426,9 +419,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
old_index: None,
new_index: Some(new_index - 1),
value: first,
missing_newline: newline_terminated
&& rest.is_empty()
&& !first.ends_with_newline(),
})
} else {
None
@ -443,9 +433,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
old_index: Some(old_index - 1),
new_index: None,
value: first,
missing_newline: newline_terminated
&& rest.is_empty()
&& !first.ends_with_newline(),
})
} else if let Some((&first, rest)) = new_slices.split_first() {
new_slices = rest;
@ -455,9 +442,6 @@ impl<'old, 'new, 'bufs, T: DiffableStr + ?Sized + 'old + 'new> TextDiff<'old, 'n
old_index: None,
new_index: Some(new_index - 1),
value: first,
missing_newline: newline_terminated
&& rest.is_empty()
&& !first.ends_with_newline(),
})
} else {
None

20
src/text/snapshots/similar__text__captured_word_ops.snap
View file

@ -12,7 +12,6 @@ expression: "&changes"
0,
),
value: "Hello",
missing_newline: false,
},
Change {
tag: Equal,
@ -23,7 +22,6 @@ expression: "&changes"
1,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -34,7 +32,6 @@ expression: "&changes"
2,
),
value: "World",
missing_newline: false,
},
Change {
tag: Equal,
@ -45,7 +42,6 @@ expression: "&changes"
3,
),
value: "\n",
missing_newline: false,
},
Change {
tag: Equal,
@ -56,7 +52,6 @@ expression: "&changes"
4,
),
value: "some",
missing_newline: false,
},
Change {
tag: Insert,
@ -65,7 +60,6 @@ expression: "&changes"
5,
),
value: " ",
missing_newline: false,
},
Change {
tag: Insert,
@ -74,7 +68,6 @@ expression: "&changes"
6,
),
value: "amazing",
missing_newline: false,
},
Change {
tag: Equal,
@ -85,7 +78,6 @@ expression: "&changes"
7,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -96,7 +88,6 @@ expression: "&changes"
8,
),
value: "stuff",
missing_newline: false,
},
Change {
tag: Equal,
@ -107,7 +98,6 @@ expression: "&changes"
9,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -118,7 +108,6 @@ expression: "&changes"
10,
),
value: "here",
missing_newline: false,
},
Change {
tag: Equal,
@ -129,7 +118,6 @@ expression: "&changes"
11,
),
value: "\n",
missing_newline: false,
},
Change {
tag: Equal,
@ -140,7 +128,6 @@ expression: "&changes"
12,
),
value: "some",
missing_newline: false,
},
Change {
tag: Equal,
@ -151,7 +138,6 @@ expression: "&changes"
13,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -162,7 +148,6 @@ expression: "&changes"
14,
),
value: "more",
missing_newline: false,
},
Change {
tag: Equal,
@ -173,7 +158,6 @@ expression: "&changes"
15,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -184,7 +168,6 @@ expression: "&changes"
16,
),
value: "stuff",
missing_newline: false,
},
Change {
tag: Equal,
@ -195,7 +178,6 @@ expression: "&changes"
17,
),
value: " ",
missing_newline: false,
},
Change {
tag: Equal,
@ -206,7 +188,6 @@ expression: "&changes"
18,
),
value: "here",
missing_newline: false,
},
Change {
tag: Equal,
@ -217,6 +198,5 @@ expression: "&changes"
19,
),
value: "\n",
missing_newline: false,
},
]

8
src/text/snapshots/similar__text__inline__line_ops_inline.snap
View file

@ -15,7 +15,6 @@ expression: "&changes"
"Stuff\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Equal,
@ -31,7 +30,6 @@ expression: "&changes"
"Hello World\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Delete,
@ -49,7 +47,6 @@ expression: "&changes"
"stuff here\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Insert,
@ -71,7 +68,6 @@ expression: "&changes"
"stuff here\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Equal,
@ -87,7 +83,6 @@ expression: "&changes"
"some more stuff here\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Delete,
@ -101,7 +96,6 @@ expression: "&changes"
"\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Delete,
@ -115,7 +109,6 @@ expression: "&changes"
"Aha stuff here\n",
),
],
missing_newline: false,
},
InlineChange {
tag: Delete,
@ -129,6 +122,5 @@ expression: "&changes"
"and more stuff",
),
],
missing_newline: true,
},
]

4
src/text/snapshots/similar__text__line_ops.snap
View file

@ -12,7 +12,6 @@ expression: "&changes"
0,
),
value: "Hello World\n",
missing_newline: false,
},
Change {
tag: Delete,
@ -21,7 +20,6 @@ expression: "&changes"
),
new_index: None,
value: "some stuff here\n",
missing_newline: false,
},
Change {
tag: Insert,
@ -30,7 +28,6 @@ expression: "&changes"
1,
),
value: "some amazing stuff here\n",
missing_newline: false,
},
Change {
tag: Equal,
@ -41,6 +38,5 @@ expression: "&changes"
2,
),
value: "some more stuff here\n",
missing_newline: false,
},
]

3
src/text/snapshots/similar__text__virtual_newlines.snap
View file

@ -12,7 +12,6 @@ expression: "&changes"
0,
),
value: "a\n",
missing_newline: false,
},
Change {
tag: Delete,
@ -21,7 +20,6 @@ expression: "&changes"
),
new_index: None,
value: "b",
missing_newline: true,
},
Change {
tag: Insert,
@ -30,6 +28,5 @@ expression: "&changes"
1,
),
value: "c\n",
missing_newline: false,
},
]

4
src/text/udiff.rs
View file

@ -258,7 +258,7 @@ impl<'diff, 'old, 'new, 'bufs, T: DiffableStr + ?Sized>
if !self.diff.newline_terminated() {
writeln!(w)?;
}
if change.missing_newline() {
if self.diff.newline_terminated() && change.missing_newline() {
writeln!(w, "{}", MissingNewlineHint(self.missing_newline_hint))?;
}
}
@ -278,7 +278,7 @@ impl<'diff, 'old, 'new, 'bufs, T: DiffableStr + ?Sized> fmt::Display
if !self.diff.newline_terminated() {
writeln!(f)?;
}
if change.missing_newline() {
if self.diff.newline_terminated() && change.missing_newline() {
writeln!(f, "{}", MissingNewlineHint(self.missing_newline_hint))?;
}
}

5
src/types.rs
View file

@ -55,7 +55,6 @@ pub struct Change<'s, T: ?Sized> {
pub(crate) old_index: Option<usize>,
pub(crate) new_index: Option<usize>,
pub(crate) value: &'s T,
pub(crate) missing_newline: bool,
}
impl<'s, T: ?Sized> Change<'s, T> {
@ -261,7 +260,7 @@ mod text_additions {
/// The [`std::fmt::Display`] implementation of [`Change`] will automatically
/// insert a newline after the value if this is true.
pub fn missing_newline(&self) -> bool {
self.missing_newline
!T::ends_with_newline(self.value)
}
}
@ -271,7 +270,7 @@ mod text_additions {
f,
"{}{}",
self.to_string_lossy(),
if self.missing_newline { "\n" } else { "" }
if self.missing_newline() { "\n" } else { "" }
)
}
}