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Add collapsing unchanged lines function

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jaseg 2025-07-27 01:10:32 +02:00
parent 2289c15d9e
commit 8bd69916f2
1 changed files with 50 additions and 4 deletions
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54
src/wsdiff.py
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@ -235,6 +235,33 @@ MAIN_CSS = r'''
.wsd-lineno, .wsd-left {
user-select: none;
}
/* Collapsing runs of unchanged lines */
.wsd-collapse {
grid-column: 1 / span 4;
display: grid;
grid-template-columns: subgrid;
}
.wsd-collapse-controls {
grid-column: 1 / span 4;
display: flex;
justify-content: center;
color: #a0a0a0;
background-image: radial-gradient(#BBBBBB 1px, transparent 0);
background-size: 10px 10px;
background-position: center;
background-repeat: repeat-x;
}
.wsd-collapse-controls > label {
background-color: #f8f8f8;
}
.wsd-collapse:has(input[type="checkbox"]:checked) > span {
display: none;
}
}
@layer wsd-automatic-media-rule {
@ -245,6 +272,10 @@ MAIN_CSS = r'''
grid-template-columns: min-content min-content 1fr;
}
.wsd-collapse, .wsd-collapse-controls {
grid-column: 1 / span 3;
}
.wsd-lineno {
padding-left: 1em;
}
@ -532,7 +563,7 @@ class RecordFormatter(Formatter):
if lineno_ours == lineno:
break
else:
self.lines.append(f'<span class="wsd-lineno wsd-{self.side} wsd-empty"></span><span class="wsd-line wsd-{self.side} wsd-empty"></span>')
self.lines.append((True, f'<span class="wsd-lineno wsd-{self.side} wsd-empty"></span><span class="wsd-line wsd-{self.side} wsd-empty"></span>'))
if not change:
change_class = ''
@ -574,10 +605,10 @@ class RecordFormatter(Formatter):
line += '</span>'
line += '</span>'
self.lines.append(line)
self.lines.append((change, line))
for _ours_empty, (lineno_theirs, _diff_theirs), change in diff:
self.lines.append(f'<span class="wsd-lineno wsd-{self.side} wsd-empty"></span><span class="wsd-line wsd-{self.side} wsd-empty"></span>')
self.lines.append((True, f'<span class="wsd-lineno wsd-{self.side} wsd-empty"></span><span class="wsd-line wsd-{self.side} wsd-empty"></span>'))
def html_diff_content(old, new, lexer):
diff = list(difflib._mdiff(old.splitlines(), new.splitlines()))
@ -588,7 +619,22 @@ def html_diff_content(old, new, lexer):
fmt_r = RecordFormatter('right', diff)
pygments.highlight(new, lexer, fmt_r)
return '\n'.join(chain.from_iterable(zip(fmt_l.lines, fmt_r.lines)))
out = []
for change, group in groupby(zip(fmt_l.lines, fmt_r.lines), lambda pair: pair[0][0]):
context_len = 5
collapse_len = 5
group = list(group)
do_collapse = not change and len(group) > 2*context_len + collapse_len
for i, ((_change_left, line_left), (_change_right, line_right)) in enumerate(group):
context_len = 5
collapse_len = 5
if do_collapse and i == context_len:
out.append(f'<div class="wsd-collapse"><div class="wsd-collapse-controls"><label><input type="checkbox" checked> Collapse {len(group) - 2*context_len} unchanged lines</label></div>')
out.append(line_left)
out.append(line_right)
if do_collapse and i == len(group) - context_len - 1:
out.append('</div>')
return '\n'.join(out)
def html_diff_block(old, new, filename, lexer, hide_filename=True):
code = html_diff_content(old, new, lexer)