#!/usr/bin/env python

import birchenv
import birchscript
import browser
import re
import os
import os.path
import sys

# This script is called for files listed in .GDEmenus files
# using openitem:

# It chooses a viewer, depending on the file extension.
# Mime might be the 'right' way to do this, but it's
# immensly easier to just write a short script, and probably
# more reliable.

# In most cases the file extension tells us what to do with
# the file. However, we also want to be able to correctly handle
# a URL, so URL tells us if sys.argv[1] is a URL, rather than a local
# file name. 

""" ensure that there are enough command line arguments to parse """
if len(sys.argv) < 2:
    print("Usage: chooseviewer.py  (URL or FILE)");
    exit();

if re.search('^http:|^https:|^ftp:|^ftps:', sys.argv[1]):
    EXT="html"
else:
    EXT=os.path.splitext(sys.argv[1])[1].lower()

if EXT in (".html", ".shtml", ".htm"):
    # -------- Web pages
    browser.forkbrowser(sys.argv[1])
elif EXT == ".pdf":
    # -------- PDF, PostScript
    birchscript.forkrun([birchenv.BL_PDFViewer, sys.argv[1]])
elif EXT == ".ps":
    birchscript.forkrun([birchenv.BL_PSViewer, sys.argv[1]])
elif EXT in (".gif", ".jpg", ".jpeg", ".png", ".bmp", ".tif", ".tiff"):
    # -------- Bitmap graphics
    birchscript.forkrun([birchenv.BL_ImageViewer, sys.argv[1]])
else:
    # -------- Default is text editor
    # Special code for text editors used by GDE and scripts called by GDE
    # Nedit crashes in some Linux systems due to libraries set in BIRCHLIBS.
    # nedit_wrapper unsets LD_LIBRARY_PATH before calling nedit.
    # gedit opens all files in a single window. gedit_wrapper.sh forces
    # gedit to open each file in different window.
    # choose_edit_wrapper.sh returns the name of the wrapper to use
    # for each editor, or just returns BL_TextEditor if there is no
    # wrapper.
    birchscript.forkrun([birchenv.BL_TextEditor, sys.argv[1]])