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import sublime, sublime_plugin, re

DEBUG_ENABLED = False
PRINT_CONTEXT = False

# Toggle between single-line or multi-line formatted css statement
#
# Save as: ~/Library/Application Support/Sublime Text 2/Packages/User/CSSToggle.py
#
# Add the following line to Preferences > Key Bindings - User
# { "keys": ["command+shift+j"], "command": "toggle_single_line_css" }
# 
# Credit: http://www.sublimetext.com/forum/viewtopic.php?f=6&t=2237

class ToggleSingleLineCssCommand(sublime_plugin.TextCommand):
    def run(self,edit):
        debug('Invoked "toggle_single_line_css" with %d region(s)' % (len(self.view.sel())))
        for region in reversed(self.view.sel()):
            text = self.view.substr(region)

            # check if the css statement needs to be expanded or collapsed
            if re.match('^.*\{.*}\s*$', text):
                 # expand the css statement
                 debug('The css statement needs to be expanded', text)
                 m = re.search('^(?P<key>.*)\{(?P<params>.*)\;\s*}$', text)
                 multiline = '%s{\n\t%s;\n}' % (m.group('key'), m.group('params').strip().replace('; ', ';\n\t'))
                 self.view.replace(edit, region, multiline)
            else:
                 debug('The css statement needs to be collapsed', text)
                 # collapse the css statement
                 singleline = ' '.join([x.strip() for x in text.split('\n')])
                 self.view.replace(edit, region, singleline)


def debug(text, context=""):
    if DEBUG_ENABLED:
        print '[toggle_single_line_css]: ' + text
    if PRINT_CONTEXT and context != "":
        print '>>> ' + context