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# Copyright (c) 2006 Michael Fellinger m.fellinger@gmail.com
# All files in this distribution are subject to the terms of the Ruby license.
module Ramaze
# Gives you some context around a specific line in a file.
# the size argument works in both directions + the actual line,
# size = 2 gives you 5 lines of source, the returned array has the
# following format.
# [
# line = [
# lineno = Integer,
# line = String,
# is_searched_line = (lineno == initial_lineno)
# ],
# ...,
# ...
# ]
# Example:
# __caller_lines__('/usr/lib/ruby/1.8/debug.rb', 122, 2) # ->
# [
# [ 120, " def check_suspend", false ],
# [ 121, " return if Thread.critical", false ],
# [ 122, " while (Thread.critical = true; @suspend_next)", true ],
# [ 123, " DEBUGGER__.waiting.push Thread.current", false ],
# [ 124, " @suspend_next = false", false ]
# ]
def self.caller_lines(file, line, size = 4)
return [[0, file, true]] if file == '(eval)'
lines = File.readlines(File.expand_path(file)) rescue []
current = line.to_i - 1
first = current - size
first = first < 0 ? 0 : first
last = current + size
last = last > lines.size ? lines.size : last
log = lines[first..last] || []
area = []
log.each_with_index do |line, index|
index = index + first + 1
area << [index, line.chomp, index == current + 1]
end
area
end
end
Version data entries
5 entries across 5 versions & 1 rubygems