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#!/usr/bin/env python
"""
Equivalent of cfityk in Python.
"""
import os
import sys
try:
import readline
except ImportError:
readline = None
import atexit
from optparse import OptionParser
import subprocess
import bisect
import functools
from math import isnan
import fityk
_PROMPT = "=-> "
_PROMPT2 = "... "
_gnuplot = None
def read_line():
try:
line = raw_input(_PROMPT)
except EOFError:
raise fityk.ExitRequestedException()
while line.endswith("\\"):
cont = raw_input(_PROMPT2)
line = line[:-1] + cont
return line
def get_filename_completions(text):
head, tail = os.path.split(text)
dirname = head or os.getcwd()
try:
return [os.path.join(head, f) for f in os.listdir(dirname)
if f.startswith(tail)]
except:
return []
class Completer:
def __init__(self, ftk):
self.ftk = ftk
self.clist = None
def complete(self, text, state):
if state == 0:
self.clist = fityk.complete_fityk_line(self.ftk,
readline.get_line_buffer(),
readline.get_begidx(), readline.get_endidx(),
text)
if len(self.clist) == 1 and self.clist[0] == "":
self.clist = get_filename_completions(text)
if state < len(self.clist):
return self.clist[state]
else:
return None
def main():
config_dir = os.path.join(os.path.expanduser("~"), fityk.config_dirname())
if readline:
histfile = os.path.join(config_dir, "history")
if hasattr(readline, "read_history_file"):
try:
readline.read_history_file(histfile)
except IOError:
pass
atexit.register(readline.write_history_file, histfile)
fityk.interrupt_computations_on_sigint()
parser = OptionParser("Usage: %prog [-h] [-V] [-c <str>]"
" [script or data file...]")
parser.add_option("-V", "--version", action="store_true",
help="output version information and exit")
parser.add_option("-c", "--cmd", action="append", default=[],
help="script passed in as string")
parser.add_option("-I", "--no-init", action="store_true",
help="don't process $HOME/.fityk/init file")
parser.add_option("-q", "--quit", action="store_true",
help="don't enter interactive shell")
(options, args) = parser.parse_args()
f = fityk.Fityk()
ui = f.get_ui_api()
ui.connect_draw_plot_py(functools.partial(plot_in_gnuplot, f))
if options.version:
print("cfityk.py %s" % f.get_info("version").split()[-1])
return
if not options.no_init:
init_file = os.path.join(config_dir, fityk.startup_commands_filename())
if os.path.exists(init_file):
sys.stderr.write(" -- init file: %s --\n" % init_file)
ui.exec_fityk_script(init_file)
sys.stderr.write(" -- end of init file --\n")
if readline:
readline.parse_and_bind("tab: complete")
readline.set_completer_delims(" \t\n\"\\'`@$><=;|&{(:") # default+":"
completer = Completer(f)
readline.set_completer(completer.complete)
try:
for s in options.cmd:
ui.exec_and_log(s)
for arg in args:
f.process_cmd_line_arg(arg)
if not options.quit:
while True:
line = read_line()
ui.exec_and_log(line)
print("")
except fityk.ExitRequestedException:
sys.stderr.write("\nbye...\n")
def plot_in_gnuplot(f, mode):
global _gnuplot
# _gnuplot is False -- failed to open
# _gnuplot is None -- not initialized
if _gnuplot is False:
return
# plot only the active dataset and model
dm_number = f.get_default_dataset()
points = f.get_data(dm_number)
left_x = f.get_view_boundary('L')
right_x = f.get_view_boundary('R')
begin = bisect.bisect_left(points, fityk.Point(left_x,0))
end = bisect.bisect_right(points, fityk.Point(right_x,0))
has_points = (begin != end)
if _gnuplot is None and has_points:
try:
_gnuplot = subprocess.Popen(['gnuplot'], stdin=subprocess.PIPE)
except OSError:
_gnuplot = False
sys.stderr.write("WARNING: Failed to open gnuplot.\n")
if not _gnuplot:
return
# send "plot ..." through the pipe to gnuplot
plot_string = ("plot %s '-' title \"data\", '-' title \"sum\" with line\n"
% f.get_info("view"))
_gnuplot.stdin.write(plot_string)
# data
if has_points:
for p in points[begin:end]:
if p.is_active and not isnan(p.x) and not isnan(p.y):
_gnuplot.stdin.write("%f %f\n" % (p.x, p.y))
else:
_gnuplot.stdin.write("0.0 0.0\n")
_gnuplot.stdin.write("e\n") # gnuplot needs 'e' at the end of data
# model
if has_points:
for p in points[begin:end]:
if p.is_active and not isnan(p.x):
y = f.get_model_value(p.x, dm_number)
if not isnan(y):
_gnuplot.stdin.write("%f %f\n" % (p.x, y))
else:
_gnuplot.stdin.write("0.0 0.0\n")
_gnuplot.stdin.write("e\n")
if __name__ == '__main__':
main()
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