lib-opal/opal/rspec/fixes/diff-lcs/hunk.rb
require 'diff/lcs/hunk'
class Diff::LCS::Hunk
def unified_diff(last = false)
# Calculate item number range.
s = encode("@@ -#{unified_range(:old, last)} +#{unified_range(:new, last)} @@\n")
# Outlist starts containing the hunk of the old file. Removing an item
# just means putting a '-' in front of it. Inserting an item requires
# getting it from the new file and splicing it in. We splice in
# +num_added+ items. Remove blocks use +num_added+ because splicing
# changed the length of outlist.
#
# We remove +num_removed+ items. Insert blocks use +num_removed+
# because their item numbers -- corresponding to positions in the NEW
# file -- don't take removed items into account.
lo, hi, num_added, num_removed = @start_old, @end_old, 0, 0
# standard:disable Performance/UnfreezeString
outlist = @data_old[lo..hi].map { |e| String.new("#{encode(" ")}#{e.chomp}") }
# standard:enable Performance/UnfreezeString
last_block = blocks[-1]
if last
old_missing_newline = missing_last_newline?(@data_old)
new_missing_newline = missing_last_newline?(@data_new)
end
@blocks.each do |block|
block.remove.each do |item|
op = item.action.to_s # -
offset = item.position - lo + num_added
# fixed for Opal:
outlist[offset] = encode(op) + outlist[offset][1..-1]
num_removed += 1
end
if last && block == last_block && old_missing_newline && !new_missing_newline
outlist << encode('\\ No newline at end of file')
num_removed += 1
end
block.insert.each do |item|
op = item.action.to_s # +
offset = item.position - @start_new + num_removed
outlist[offset, 0] = encode(op) + @data_new[item.position].chomp
num_added += 1
end
end
outlist << encode('\\ No newline at end of file') if last && new_missing_newline
s += outlist.join(encode("\n"))
s
end
def context_diff(last = false)
s = encode("***************\n")
s += encode("*** #{context_range(:old, ",", last)} ****\n")
r = context_range(:new, ",", last)
if last
old_missing_newline = missing_last_newline?(@data_old)
new_missing_newline = missing_last_newline?(@data_new)
end
# Print out file 1 part for each block in context diff format if there
# are any blocks that remove items
lo, hi = @start_old, @end_old
removes = @blocks.reject { |e| e.remove.empty? }
unless removes.empty?
# standard:disable Performance/UnfreezeString
outlist = @data_old[lo..hi].map { |e| String.new("#{encode(" ")}#{e.chomp}") }
# standard:enable Performance/UnfreezeString
last_block = removes[-1]
removes.each do |block|
block.remove.each do |item|
outlist[item.position - lo] = encode(block.op) + outlist[item.position - lo][1..-1] # - or !
end
if last && block == last_block && old_missing_newline
outlist << encode('\\ No newline at end of file')
end
end
s += outlist.join(encode("\n")) + encode("\n")
end
s += encode("--- #{r} ----\n")
lo, hi = @start_new, @end_new
inserts = @blocks.reject { |e| e.insert.empty? }
unless inserts.empty?
# standard:disable Performance/UnfreezeString
outlist = @data_new[lo..hi].map { |e| String.new("#{encode(" ")}#{e.chomp}") }
# standard:enable Performance/UnfreezeString
last_block = inserts[-1]
inserts.each do |block|
block.insert.each do |item|
outlist[item.position - lo] = encode(block.op) + outlist[item.position - lo][1..-1] # + or !
end
if last && block == last_block && new_missing_newline
outlist << encode('\\ No newline at end of file')
end
end
s += outlist.join(encode("\n"))
end
s
end
def old_diff(_last = false)
warn "Expecting only one block in an old diff hunk!" if @blocks.size > 1
block = @blocks[0]
# Calculate item number range. Old diff range is just like a context
# diff range, except the ranges are on one line with the action between
# them.
s = encode("#{context_range(:old, ",")}#{OLD_DIFF_OP_ACTION[block.op]}#{context_range(:new, ",")}\n")
# If removing anything, just print out all the remove lines in the hunk
# which is just all the remove lines in the block.
unless block.remove.empty?
@data_old[@start_old..@end_old].each { |e| s += encode("< ") + e.chomp + encode("\n") }
end
s += encode("---\n") if block.op == "!"
unless block.insert.empty?
@data_new[@start_new..@end_new].each { |e| s += encode("> ") + e.chomp + encode("\n") }
end
s
end
def ed_diff(format, _last = false)
warn "Expecting only one block in an old diff hunk!" if @blocks.size > 1
s =
if format == :reverse_ed
encode("#{ED_DIFF_OP_ACTION[@blocks[0].op]}#{context_range(:old, ",")}\n")
else
encode("#{context_range(:old, " ")}#{ED_DIFF_OP_ACTION[@blocks[0].op]}\n")
end
unless @blocks[0].insert.empty?
@data_new[@start_new..@end_new].each do |e|
s += e.chomp + encode("\n")
end
s += encode(".\n")
end
s
end
end