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annotate python/html2flux.py @ 626:89a72399286b

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adding file demonstrating classes
author Jeff Hammel <k0scist@gmail.com>
date Mon, 17 Feb 2014 17:33:23 -0800
parents a43d0205f80b
children fbfc02ea7d8e
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1 #!/usr/bin/env python
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2
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3 """
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4 transform an HTML <dl> file into a fluxbox menu
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5 if no file give, read from stdin
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6
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7 <dl><a>submenu name</a>
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8 <dt>program label</dt><dd>command</dd>
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9 <dt>another program label</dt><dd>command2</dd>
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10 </dl>
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11
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12 x-form -> internal format:
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13
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14 ('submenu name': [('program label', 'command'),
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15 ('another program label', 'command2')])
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16 """
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17
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18 import optparse
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19 import os
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20 import sys
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21 from lxml import etree
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22 from lsex import lsex # local import
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23
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24 # available executables
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25 executables = set([i.rsplit('/', 1)[-1] for i in lsex() ])
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26
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27 # TODO: next generation
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28 # class HtmlMenu
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29 # def _init__(self, html):
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30 # if isinstance (html, string):
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31 # html =
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32 # for item in html
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33
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34 # class Command
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35 # classname = ''
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36
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37 # class Sudo(Command)
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38 # classname = 'sudo'
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39 # programs = (('gksudo',),)
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40
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41 def readmenu(dl, output, top=True):
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42 """read menu from an <dl> tag"""
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43 # TODO: probably don't really need lxml
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44
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45 menu_items = []
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46 name = None # menu name
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47 firstchild = True
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48 label = None
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49 for child in dl.iterchildren():
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50
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51 if not top and child.tag == 'a' and firstchild:
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52 # TODO: better way of labeling this!
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53 name = child.text.strip()
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54
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55 if child.tag == 'dt':
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56 # item label
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57 label = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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58 if child.tag == 'dd':
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59 # command
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60 command = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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61 # TODO: classes
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62 executable = command.split()[0]
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63 if executable in executables or os.path.isabs(executable):
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64 menu_items.append((label, command))
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65
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66 # submenu
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67 if child.tag == 'dl':
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68 menu_items.append(readmenu(child, output, top=False))
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69
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70 return (name, menu_items)
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71
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72 def printflux(name, menu, output, top=True):
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73 """
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74 - output: file-like object for writing
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75 """
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76
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77 # print [submenu] tag for this menu
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78 name = name or ''
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79 if not top:
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80 print >> output, '[submenu] (%s)' % name
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81
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82 # print menu items
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83 for name, item in menu:
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84 if isinstance(item, basestring):
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85 # command
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86 print >> output, '[exec] (%s) {%s}' % (name, item)
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87 else:
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88 # submenu
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89 printflux(name, item, output, top=False)
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90
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91 # print end of this submenu
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92 if not top:
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93 print >> output, '[end]'
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94
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95 def printmenu(dl, output):
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96 name, menu = readmenu(dl, output)
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97 printflux(name, menu, output)
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98
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99 def main(args=sys.argv[1:]):
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100 """command line interface"""
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101
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102 # parse command line option
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103 usage = '%prog [options] [menu.html]'
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104 parser = optparse.OptionParser(usage=usage,
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105 description=__doc__)
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106 parser.add_option('--collapse', dest='collapse',
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107 action='store_true', default=False,
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108 help="collapse menus with a single item to that item")
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109 parser.add_option('-o', '--output', dest='output',
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110 help="output file [Default: <stdout>]")
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111 options, args = parser.parse_args(args)
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112
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113 # setup input, output
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114 if args:
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115 htmlfile = file(args[0])
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116 else:
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117 htmlfile = sys.stdin
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118 html = htmlfile.read()
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119 fluxout = sys.stdout
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120
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121 # get first element
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122 dom = etree.fromstring(html)
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123 dl = dom.find('.//dl')
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124
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125 # print to stdout
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126 printmenu(dl, fluxout)
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127
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128 if __name__ == '__main__':
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129 main()