import sublime, sublime_plugin
import re

# Insert LaTeX environment based on current word
# Position cursor inside environment

class latexenvCommand(sublime_plugin.TextCommand):
	def run(self, edit, **args):
		view = self.view

		# Workaround: env* and friends trip ST2 up because * is a word boundary,
		# so we search for a word boundary

		# Code is similar to latex_cite_completions.py (should prbly factor out)
		point = view.sel()[0].b
		line = view.substr(sublime.Region(view.line(point).a, point))
		line = line[::-1]
		rex = re.compile(r"([^\s\{]*)\s?\{?")
		expr = re.match(rex, line)
		if expr:
			environment = expr.group(1)[::-1]
			if environment:
				environment_region = sublime.Region(point-len(environment),point)
				view.erase(edit, environment_region)
				snippet = "\\\\begin{" + environment + "}\n$1\n\\\\end{" + environment + "}$0"
			else:
				snippet = "\\\\begin{${1:env}}\n$2\n\end{$1}$0"
			view.run_command("insert_snippet", {'contents' : snippet})
		else:
			sublime.status_message("LATEXTOOLS INTERNAL ERROR: could not find environment to expand")

