#!/usr/bin/env python
"""Python version of cairo-demo/cairo_snippets/cairo_snippets_pdf.c
create a file for each example rather than one large file for all examples
"""

from __future__ import division
from math import pi as M_PI  # used by many snippets
import sys

import cairo
if not cairo.HAS_PDF_SURFACE:
  raise SystemExit ('cairo was not compiled with PDF support')

from snippets import snip_list, snippet_normalize


width_in_inches, height_in_inches = 2, 2
width_in_points, height_in_points = width_in_inches * 72, height_in_inches * 72
width, height = width_in_points, height_in_points # used by snippet_normalize()


def do_snippet (snippet):
  if verbose_mode:
    print('processing %s' % snippet)

  filename = 'snippets/%s.pdf' % snippet
  surface = cairo.PDFSurface (filename, width_in_points, height_in_points)
  cr = cairo.Context (surface)

  cr.save()
  try:
    fName = 'snippets/%s.py' % snippet
    code = open(fName).read()
    exec (code, globals(), locals())
  except:
    exc_type, exc_value = sys.exc_info()[:2]
    print(exc_type, exc_value, file=sys.stderr)
  else:
    cr.restore()
    cr.show_page()
    surface.finish()

  if verbose_mode:
    print

if __name__ == '__main__':
  verbose_mode = True
  if len(sys.argv) > 1 and sys.argv[1] == '-s':
    verbose_mode = False
    del sys.argv[1]

  if len(sys.argv) > 1: # do specified snippets
    snippet_list = sys.argv[1:]
  else:                 # do all snippets
    snippet_list = snip_list

  for s in snippet_list:
    do_snippet (s)
