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Ensure that neighboring changes of the same kind are merged

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Kovid Goyal 2014-01-19 20:31:09 +05:30
parent 9e68f3a488
commit 5a02780254
1 changed files with 19 additions and 3 deletions
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22
src/calibre/gui2/tweak_book/diff.py
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@ -244,12 +244,25 @@ def do_layout(self, context=None):
c.movePosition(c.Start)
v.setTextCursor(c)
self.coalesce_changes()
for ltop, lbot, rtop, rbot, kind in self.changes:
self.left.changes.append((ltop, lbot, kind))
self.right.changes.append((rtop, rbot, kind))
if kind != 'equal':
self.left.changes.append((ltop, lbot, kind))
self.right.changes.append((rtop, rbot, kind))
self.update()
def coalesce_changes(self):
'Merge neighboring changes of the same kind, if any'
changes = []
for x in self.changes:
if changes and changes[-1].kind == x.kind:
changes[-1] = changes[-1]._replace(lbot=x.lbot, rbot=x.rbot)
else:
changes.append(x)
self.changes = changes
def do_insert(self, cursor, highlighter, line_number_map, lo, hi):
start_block = cursor.block()
highlighter.copy_lines(lo, hi, cursor)
@ -258,7 +271,10 @@ def do_insert(self, cursor, highlighter, line_number_map, lo, hi):
return start_block.blockNumber(), cursor.block().blockNumber()
def equal(self, alo, ahi, blo, bhi):
self.left_insert(alo, ahi), self.right_insert(blo, bhi)
lsb, lcb = self.left_insert(alo, ahi)
rsb, rcb = self.right_insert(blo, bhi)
self.changes.append(Change(
rtop=rsb, rbot=rcb, ltop=lsb, lbot=lcb, kind='equal'))
def delete(self, alo, ahi, blo, bhi):
start_block, current_block = self.left_insert(alo, ahi)