gedit-folding/folding.py at master · dstarod/gedit-folding · GitHub

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# -*- coding: utf-8 -*-
import gtk
import gedit

ui_str = """<ui>
	<menubar name="MenuBar">
		<menu name="ToolsMenu" action="Tools">
			<placeholder name="ToolsOps_2">
				<menuitem name="Folding" action="FoldingPy"/>
			</placeholder>
		</menu>
	</menubar>
</ui>
"""

class FoldingPyWindowHelper():
	def __init__(self, plugin, window):
		self._window = window
		self._plugin = plugin
		self._insert_menu()
		self.update_ui()

	def deactivate(self):
		self._remove_menu()
		self._window = None
		self._plugin = None
		self._action_group = None

	def _insert_menu(self):
		manager = self._window.get_ui_manager()
		self._action_group = gtk.ActionGroup("FoldingPyPluginActions")
		self._action_group.add_actions(
			[
				(
					"FoldingPy", None, "Fold",
					"<Alt>Z", "Fold",
					self.fold
				)
			],
		)
		manager.insert_action_group(self._action_group, -1)
		self._ui_id = manager.add_ui_from_string(ui_str)

	def _remove_menu(self):
		manager = self._window.get_ui_manager()
		manager.remove_ui(self._ui_id)
		manager.remove_action_group(self._action_group)
		manager.ensure_update()

	def update_ui(self):
		self._action_group.set_sensitive(self._window.get_active_document() != None)
		self.doc=self._window.get_active_document()
		if self.doc:
			self.view=self._window.get_active_view()
			self.view.connect('key-press-event', self.fold_off)

			table=self.doc.get_tag_table()
			self.fld=table.lookup('fld')
			if self.fld==None:
				self.fld=self.doc.create_tag('fld',foreground="#333333",paragraph_background="#aadc5c")
			self.inv=table.lookup('inv')
			if self.inv==None:
				self.inv=self.doc.create_tag('inv',invisible=True)

	def detect_sps(self,sps):
		sps_lstrip=sps.lstrip()
		i=sps.index(sps_lstrip)
		sps=sps[:i]
		return sps.count(' ')+sps.count('\t')*self.view.get_tab_width()

	def fold_off(self,widget,e=None):
		if e.hardware_keycode==53 and self.keycode==64:
			s,e=self.doc.get_bounds()
			self.doc.remove_tag(self.fld,s,e)
			self.doc.remove_tag(self.inv,s,e)
			self.keycode=53
			print "SimpleFolding plugin: remove all fold"
		else:
			self.keycode=e.hardware_keycode

	def fold(self, action):
		a=self.doc.get_iter_at_mark(self.doc.get_insert())
		if a.has_tag(self.fld):
			try:
				a.set_line_offset(0)
				b=a.copy()
				b.forward_line()
				self.doc.remove_tag(self.fld,a,b)
				a.forward_to_tag_toggle(self.inv)
				b.forward_to_tag_toggle(self.inv)
				self.doc.remove_tag(self.inv,a,b)
				print "SimpleFolding plugin: remove one fold"
			except:
				pass

		elif len(self.doc.get_selection_bounds())==2:
			a,c=self.doc.get_selection_bounds()
			b=a.copy()
			a.set_line_offset(0)
			b.forward_line()
			c.forward_line()
			self.doc.apply_tag(self.fld,a,b)
			self.doc.remove_tag(self.fld,b,c)
			self.doc.remove_tag(self.inv,b,c)
			self.doc.apply_tag(self.inv,b,c)
			print "SimpleFolding plugin: create fold by selection"

		else:
			s=a.copy()
			s.set_line_offset(0)
			line = s.get_line()
			e=s.copy()
			e.forward_line()
			t=s.get_text(e)
			if t.strip()!="":
				main_indent = self.detect_sps(s.get_text(e))
				ns=s.copy()
				fin=ns.copy()
				while 1==1:
					if ns.forward_line():
						ne=ns.copy()
						if ne.get_char()=="\n":
							continue
						ne.forward_to_line_end()
						text=ns.get_text(ne)
						if text.strip()=="":
							continue
						child_indent=self.detect_sps(text)
						if child_indent <= main_indent:
							break
						else:
							line=ns.get_line()
						fin=ns.copy()
						fin.set_line(line)
						fin.forward_line()
					else:
						fin=ne.copy()
						fin.forward_to_end()
						line=fin.get_line()
						break

				if s.get_line()<line:
					self.doc.apply_tag(self.fld,s,e)
					self.doc.remove_tag(self.fld,e,fin)
					self.doc.remove_tag(self.inv,e,fin)
					self.doc.apply_tag(self.inv,e,fin)
					print "SimpleFolding plugin: create fold by indent"


class FoldingPyPlugin(gedit.Plugin):
	def __init__(self):
		gedit.Plugin.__init__(self)
		self._instances = {}
	def activate(self, window):
		self._instances[window] = FoldingPyWindowHelper(self, window)
	def deactivate(self, window):
		self._instances[window].deactivate()
		del self._instances[window]
	def update_ui(self, window):
		self._instances[window].update_ui()