summaryrefslogtreecommitdiff
path: root/Mozo/MenuEditor.py
blob: 1db4feb1fd50254a3c738e818a90a5607e45cda5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
# -*- coding: utf-8 -*-
#   Mozo Menu Editor - Simple fd.o Compliant Menu Editor
#   Copyright (C) 2006  Travis Watkins, Heinrich Wendel
#
#   This library is free software; you can redistribute it and/or
#   modify it under the terms of the GNU Library General Public
#   License as published by the Free Software Foundation; either
#   version 2 of the License, or (at your option) any later version.
#
#   This library is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#   Library General Public License for more details.
#
#   You should have received a copy of the GNU Library General Public
#   License along with this library; if not, write to the Free Software
#   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import codecs
import os
import xml.dom.minidom
import xml.parsers.expat
import locale
import gi
gi.require_version('MateMenu', '2.0')
from gi.repository import MateMenu, GLib
from Mozo import util

class Menu:
    tree = None
    visible_tree = None
    path = None
    dom = None

class MenuEditor(object):
    def __init__(self):
        self.locale = locale.getdefaultlocale()[0]
        self.__undo = []
        self.__redo = []
        self.applications = Menu()
        self.applications.tree = MateMenu.Tree.new('mate-applications.menu', MateMenu.TreeFlags.SHOW_EMPTY|MateMenu.TreeFlags.INCLUDE_EXCLUDED|MateMenu.TreeFlags.INCLUDE_NODISPLAY|MateMenu.TreeFlags.SHOW_ALL_SEPARATORS|MateMenu.TreeFlags.SORT_DISPLAY_NAME)
        self.applications.visible_tree = MateMenu.Tree.new('mate-applications.menu', MateMenu.TreeFlags.SORT_DISPLAY_NAME)
        self.applications.tree.sort_key = MateMenu.TreeFlags.SORT_DISPLAY_NAME
        self.applications.visible_tree.sort_key = MateMenu.TreeFlags.SORT_DISPLAY_NAME
        self.applications.tree.connect('changed', self.menuChanged)

        self.settings = Menu()
        self.settings.tree = MateMenu.Tree.new('mate-settings.menu', MateMenu.TreeFlags.SHOW_EMPTY|MateMenu.TreeFlags.INCLUDE_EXCLUDED|MateMenu.TreeFlags.INCLUDE_NODISPLAY|MateMenu.TreeFlags.SHOW_ALL_SEPARATORS|MateMenu.TreeFlags.SORT_DISPLAY_NAME)
        self.settings.visible_tree = MateMenu.Tree.new('mate-settings.menu', MateMenu.TreeFlags.SORT_DISPLAY_NAME)
        self.settings.tree.sort_key = MateMenu.TreeFlags.SORT_DISPLAY_NAME
        self.settings.visible_tree.sort_key = MateMenu.TreeFlags.SORT_DISPLAY_NAME
        self.settings.tree.connect('changed', self.menuChanged)
        self.load()
        self.__loadMenus()

    def __loadMenus(self):
        self.applications.path = os.path.join(util.getUserMenuPath(), self.applications.tree.props.menu_basename)
        try:
            self.applications.dom = xml.dom.minidom.parse(self.applications.path)
        except (IOError, xml.parsers.expat.ExpatError):
            self.applications.dom = xml.dom.minidom.parseString(util.getUserMenuXml(self.applications.tree))
        util.removeWhitespaceNodes(self.applications.dom)

        self.settings.path = os.path.join(util.getUserMenuPath(), self.settings.tree.props.menu_basename)
        try:
            self.settings.dom = xml.dom.minidom.parse(self.settings.path)
        except (IOError, xml.parsers.expat.ExpatError):
            self.settings.dom = xml.dom.minidom.parseString(util.getUserMenuXml(self.settings.tree))
        util.removeWhitespaceNodes(self.settings.dom)
        self.save(True)

    def load(self):
        if not self.applications.tree.load_sync():
            raise ValueError("can not load menu tree %r" % (self.applications.tree.props.menu_basename,))
        if not self.settings.tree.load_sync():
            raise ValueError("can not load menu tree %r" % (self.settings.tree.props.menu_basename,))
        if not self.applications.visible_tree.load_sync():
            raise ValueError("can not load menu tree %r" % (self.applications.visible_tree.props.menu_basename,))
        if not self.settings.visible_tree.load_sync():
            raise ValueError("can not load menu tree %r" % (self.settings.visible_tree.props.menu_basename,))

    def menuChanged(self, *a):
        self.load()

    def save(self, from_loading=False):
        for menu in ('applications', 'settings'):
            with codecs.open(getattr(self, menu).path, 'w', 'utf-8') as f:
                f.write(getattr(self, menu).dom.toprettyxml())
        if not from_loading:
            self.load()
            self.__loadMenus()

    def quit(self):
        for file_name in os.listdir(util.getUserItemPath()):
            if file_name[-6:-2] in ('redo', 'undo'):
                file_path = os.path.join(util.getUserItemPath(), file_name)
                os.unlink(file_path)
        for file_name in os.listdir(util.getUserDirectoryPath()):
            if file_name[-6:-2] in ('redo', 'undo'):
                file_path = os.path.join(util.getUserDirectoryPath(), file_name)
                os.unlink(file_path)
        for file_name in os.listdir(util.getUserMenuPath()):
            if file_name[-6:-2] in ('redo', 'undo'):
                file_path = os.path.join(util.getUserMenuPath(), file_name)
                os.unlink(file_path)

    def revert(self):
        for name in ('applications', 'settings'):
            menu = getattr(self, name)
            self.revertTree(menu.tree.get_root_directory())
            path = os.path.join(util.getUserMenuPath(), menu.tree.props.menu_basename)
            try:
                os.unlink(path)
            except OSError:
                pass
            #reload DOM for each menu
            try:
                menu.dom = xml.dom.minidom.parse(menu.path)
            except (IOError, xml.parsers.expat.ExpatError):
                menu.dom = xml.dom.minidom.parseString(util.getUserMenuXml(menu.tree))
            util.removeWhitespaceNodes(menu.dom)
        #reset undo/redo, no way to recover from this
        self.__undo, self.__redo = [], []
        self.save()

    def revertTree(self, menu):
        item_iter = menu.iter()
        item_type = item_iter.next()
        while item_type != MateMenu.TreeItemType.INVALID:
            if item_type == MateMenu.TreeItemType.DIRECTORY:
                item = item_iter.get_directory()
                self.revertTree(item)
            elif item_type == MateMenu.TreeItemType.ENTRY:
                item = item_iter.get_entry()
                self.revertItem(item)
            item_type = item_iter.next()
        self.revertMenu(menu)

    def revertItem(self, item):
        if not self.canRevert(item):
            return
        self.__addUndo([item,])
        try:
            os.remove(item.get_desktop_file_path())
        except OSError:
            pass
        self.save()

    def revertMenu(self, menu):
        if not self.canRevert(menu):
            return
        #wtf happened here? oh well, just bail
        if not menu.get_desktop_file_path():
            return
        self.__addUndo([menu,])
        file_id = os.path.split(menu.get_desktop_file_path())[1]
        path = os.path.join(util.getUserDirectoryPath(), file_id)
        try:
            os.remove(path)
        except OSError:
            pass
        self.save()

    def undo(self):
        if len(self.__undo) == 0:
            return
        files = self.__undo.pop()
        redo = []
        for undo_path in files[::-1]:
            new_path = undo_path.rsplit('.', 1)[0]
            if not os.path.exists(undo_path):
                continue
            redo_path = util.getUniqueRedoFile(new_path)

            # create redo file
            try:
                with codecs.open(new_path, 'r', 'utf-8') as f_new:
                    with codecs.open(redo_path, 'w', 'utf-8') as f_redo:
                        f_redo.write(f_new.read())
                redo.append(redo_path)
            except FileNotFoundError:
                pass

            # restore undo file
            try:
                with codecs.open(undo_path, 'r', 'utf-8') as f_undo:
                    with codecs.open(new_path, 'w', 'utf-8') as f_new:
                        f_new.write(f_undo.read())
                os.unlink(undo_path)
            except FileNotFoundError:
                pass

        # reload DOM to make changes stick
        for name in ('applications', 'settings'):
            menu = getattr(self, name)
            try:
                menu.dom = xml.dom.minidom.parse(menu.path)
            except (IOError, xml.parsers.expat.ExpatError):
                menu.dom = xml.dom.minidom.parseString(util.getUserMenuXml(menu.tree))
            util.removeWhitespaceNodes(menu.dom)
        if redo:
            self.__redo.append(redo)

    def redo(self):
        if len(self.__redo) == 0:
            return
        files = self.__redo.pop()
        undo = []
        for redo_path in files[::-1]:
            new_path = redo_path.rsplit('.', 1)[0]
            if not os.path.exists(redo_path):
                continue
            undo_path = util.getUniqueUndoFile(new_path)

            # create undo file
            try:
                with codecs.open(new_path, 'r', 'utf-8') as f_new:
                    with codecs.open(undo_path, 'w', 'utf-8') as f_undo:
                        f_undo.write(f_new.read())
                undo.append(undo_path)
            except FileNotFoundError:
                pass

            # restore redo file
            try:
                with codecs.open(redo_path, 'r', 'utf-8') as f_redo:
                    with codecs.open(new_path, 'w', 'utf-8') as f_new:
                        f_new.write(f_redo.read())
                os.unlink(redo_path)
            except FileNotFoundError:
                pass

        #reload DOM to make changes stick
        for name in ('applications', 'settings'):
            menu = getattr(self, name)
            try:
                menu.dom = xml.dom.minidom.parse(menu.path)
            except (IOError, xml.parsers.expat.ExpatError):
                menu.dom = xml.dom.minidom.parseString(util.getUserMenuXml(menu.tree))
            util.removeWhitespaceNodes(menu.dom)
        if undo:
            self.__undo.append(undo)

    def getMenus(self, parent=None):
        if parent is None:
            yield self.applications.tree.get_root_directory()
            yield self.settings.tree.get_root_directory()
        else:
            item_iter = parent.iter()
            item_type = item_iter.next()
            while item_type != MateMenu.TreeItemType.INVALID:
                if item_type == MateMenu.TreeItemType.DIRECTORY:
                    item = item_iter.get_directory()
                    yield (item, self.__isVisible(item))
                item_type = item_iter.next()

    def getContents(self, item):
        contents = []
        item_iter = item.iter()
        item_type = item_iter.next()

        while item_type != MateMenu.TreeItemType.INVALID:
            item = None
            if item_type == MateMenu.TreeItemType.DIRECTORY:
                item = item_iter.get_directory()
            elif item_type == MateMenu.TreeItemType.ENTRY:
                item = item_iter.get_entry()
            elif item_type == MateMenu.TreeItemType.HEADER:
                item = item_iter.get_header()
            elif item_type == MateMenu.TreeItemType.ALIAS:
                item = item_iter.get_alias()
            elif item_type == MateMenu.TreeItemType.SEPARATOR:
                item = item_iter.get_separator()
            if item:
                contents.append(item)
            item_type = item_iter.next()
        return contents

    def getItems(self, menu):
        for item in self.getContents(menu):
            if isinstance(item, MateMenu.TreeSeparator):
                yield(item, True)
            else:
                if isinstance(item, MateMenu.TreeEntry) and item.get_desktop_file_id()[-19:] == '-usercustom.desktop':
                     continue
                yield (item, self.__isVisible(item))

    def canRevert(self, item):
        if isinstance(item, MateMenu.TreeEntry):
            if util.getItemPath(item.get_desktop_file_id()) is not None:
                path = util.getUserItemPath()
                if os.path.isfile(os.path.join(path, item.get_desktop_file_id())):
                    return True
        elif isinstance(item, MateMenu.TreeDirectory):
            if item.get_desktop_file_path():
                file_id = os.path.split(item.get_desktop_file_path())[1]
            else:
                file_id = item.get_menu_id() + '.directory'
            if util.getDirectoryPath(file_id) is not None:
                path = util.getUserDirectoryPath()
                if os.path.isfile(os.path.join(path, file_id)):
                    return True
        return False

    def setVisible(self, item, visible):
        dom = self.__getMenu(item).dom
        if isinstance(item, MateMenu.TreeEntry):
            self.__addUndo([self.__getMenu(item), item])
            menu_xml = self.__getXmlMenu(self.__getPath(item.get_parent()), dom.documentElement, dom)
            if visible:
                self.__addXmlFilename(menu_xml, dom, item.get_desktop_file_id(), 'Include')
                self.__writeItem(item, NoDisplay=False)
            else:
                self.__addXmlFilename(menu_xml, dom, item.get_desktop_file_id(), 'Exclude')
            self.__addXmlTextElement(menu_xml, 'AppDir', util.getUserItemPath(), dom)
        elif isinstance(item, MateMenu.TreeDirectory):
            self.__addUndo([self.__getMenu(item), item])
            item_iter = item.iter()
            first_child_type = item_iter.next()
            #don't mess with it if it's empty
            if first_child_type == MateMenu.TreeItemType.INVALID:
                return
            menu_xml = self.__getXmlMenu(self.__getPath(item), dom.documentElement, dom)
            for node in self.__getXmlNodesByName(['Deleted', 'NotDeleted'], menu_xml):
                node.parentNode.removeChild(node)
            self.__writeMenu(item, NoDisplay=not visible)
            self.__addXmlTextElement(menu_xml, 'DirectoryDir', util.getUserDirectoryPath(), dom)
        self.save()

    def createItem(self, parent, before, after, **kwargs):
        file_id = self.__writeItem(None, **kwargs)
        self.insertExternalItem(file_id, parent.get_menu_id(), before, after)

    def insertExternalItem(self, file_id, parent_id, before=None, after=None):
        parent = self.__findMenu(parent_id)
        dom = self.__getMenu(parent).dom
        self.__addItem(parent, file_id, dom)
        self.__positionItem(parent, ('Item', file_id), before, after)
        self.__addUndo([self.__getMenu(parent), ('Item', file_id)])
        self.save()

    def insertExternalMenu(self, file_id, parent_id, before=None, after=None):
        menu_id = file_id.rsplit('.', 1)[0]
        parent = self.__findMenu(parent_id)
        dom = self.__getMenu(parent).dom
        self.__addXmlDefaultLayout(self.__getXmlMenu(self.__getPath(parent), dom.documentElement, dom) , dom)
        menu_xml = self.__getXmlMenu(self.__getPath(parent) + [menu_id], dom.documentElement, dom)
        self.__addXmlTextElement(menu_xml, 'Directory', file_id, dom)
        self.__positionItem(parent, ('Menu', menu_id), before, after)
        self.__addUndo([self.__getMenu(parent), ('Menu', file_id)])
        self.save()

    def createSeparator(self, parent, before=None, after=None):
        self.__positionItem(parent, ('Separator',), before, after)
        self.__addUndo([self.__getMenu(parent), ('Separator',)])
        self.save()

    def editItem(self, item, icon, name, comment, command, use_term, parent=None, final=True):
        #if nothing changed don't make a user copy
        app_info = item.get_app_info()
        if icon == app_info.get_icon() and name == app_info.get_display_name() and comment == item.get_comment() and command == item.get_exec() and use_term == item.get_launch_in_terminal():
            return
        #hack, item.get_parent() seems to fail a lot
        if not parent:
            parent = item.get_parent()
        if final:
            self.__addUndo([self.__getMenu(parent), item])
        self.__writeItem(item, Icon=icon, Name=name, Comment=comment, Exec=command, Terminal=use_term)
        if final:
            dom = self.__getMenu(parent).dom
            menu_xml = self.__getXmlMenu(self.__getPath(parent), dom.documentElement, dom)
            self.__addXmlTextElement(menu_xml, 'AppDir', util.getUserItemPath(), dom)
        self.save()

    def editMenu(self, menu, icon, name, comment, final=True):
        #if nothing changed don't make a user copy
        if icon == menu.get_icon() and name == menu.get_name() and comment == menu.get_comment():
            return
        #we don't use this, we just need to make sure the <Menu> exists
        #otherwise changes won't show up
        dom = self.__getMenu(menu).dom
        menu_xml = self.__getXmlMenu(self.__getPath(menu), dom.documentElement, dom)
        self.__writeMenu(menu, Icon=icon, Name=name, Comment=comment)
        if final:
            self.__addXmlTextElement(menu_xml, 'DirectoryDir', util.getUserDirectoryPath(), dom)
            self.__addUndo([self.__getMenu(menu), menu])
        self.save()

    def copyItem(self, item, new_parent, before=None, after=None):
        dom = self.__getMenu(new_parent).dom
        file_path = item.get_desktop_file_path()
        keyfile = GLib.KeyFile()
        keyfile.load_from_file(file_path, util.KEY_FILE_FLAGS)
        util.fillKeyFile(keyfile, dict(Categories=[], Hidden=False))

        file_id = util.getUniqueFileId(os.path.basename(file_path).split(".desktop", 1)[0], ".desktop")
        out_path = os.path.join(util.getUserItemPath(), file_id)

        contents = keyfile.to_data()[0]

        with open(out_path, 'w') as f:
            f.write(contents)

        self.__addItem(new_parent, file_id, dom)
        self.__positionItem(new_parent, ('Item', file_id), before, after)
        self.__addUndo([self.__getMenu(new_parent), ('Item', file_id)])
        self.save()
        return file_id

    def moveItem(self, item, new_parent, before=None, after=None):
        undo = []
        if item.get_parent() != new_parent:
            # create new item
            file_id = self.copyItem(item, new_parent)
            # hide old item
            self.deleteItem(item)
            item = ('Item', file_id)
        self.__positionItem(new_parent, item, before, after)
        undo.append(self.__getMenu(new_parent))
        self.__addUndo(undo)
        # merge the undo entries created by the previous operations in the
        # correct order so we can undo in one go
        items = self.__undo.pop()[::-1] + self.__undo.pop()[::-1] + self.__undo.pop()[::-1]
        self.__undo.append(items[::-1])
        self.save()

    def moveMenu(self, menu, new_parent, before=None, after=None):
        parent = new_parent
        #don't move a menu into it's child
        while parent.get_parent():
            parent = parent.get_parent()
            if parent == menu:
                return False

        #don't move a menu into itself
        if new_parent == menu:
            return False

        #can't move between top-level menus
        if self.__getMenu(menu) != self.__getMenu(new_parent):
            return False
        if menu.get_parent() != new_parent:
            dom = self.__getMenu(menu).dom
            path = self.__getPath(menu)
            xml_root = self.__getXmlMenu(path[0], dom.documentElement, dom)
            new_path = self.__getPath(new_parent) + [menu.get_menu_id()]
            self.__addXmlMove(xml_root, '/'.join(path), '/'.join(new_path), dom)
        self.__positionItem(new_parent, menu, before, after)
        self.__addUndo([self.__getMenu(new_parent),])
        self.save()

    def moveSeparator(self, separator, new_parent, before=None, after=None):
        undo = []
        # remove the original separator if its parent is not the new destination
        if separator.get_parent() != new_parent:
            self.deleteSeparator(separator)
            undo.append(separator)
        # this adds the new separator to the specified position
        self.__positionItem(new_parent, separator, before, after)
        undo.append(self.__getMenu(new_parent))
        self.__addUndo(undo)
        self.save()

    def deleteItem(self, item):
        self.__addUndo([item,])
        self.__writeItem(item, Hidden=True)
        self.save()

    def deleteMenu(self, menu):
        dom = self.__getMenu(menu).dom
        menu_xml = self.__getXmlMenu(self.__getPath(menu), dom.documentElement, dom)
        self.__addDeleted(menu_xml, dom)
        self.__addUndo([self.__getMenu(menu),])
        self.save()

    def deleteSeparator(self, item):
        parent = item.get_parent()
        contents = self.getContents(parent)
        contents.remove(item)
        layout = self.__createLayout(contents)
        dom = self.__getMenu(parent).dom
        menu_xml = self.__getXmlMenu(self.__getPath(parent), dom.documentElement, dom)
        self.__addXmlLayout(menu_xml, layout, dom)
        self.__addUndo([self.__getMenu(item.get_parent()),])
        self.save()

    #private stuff
    def __addUndo(self, items):
        self.__undo.append([])
        for item in items:
            if isinstance(item, Menu):
                file_path = item.path
            elif isinstance(item, tuple):
                if item[0] == 'Item':
                    file_path = os.path.join(util.getUserItemPath(), item[1])
                    if not os.path.isfile(file_path):
                        file_path = util.getItemPath(item[1])
                elif item[0] == 'Menu':
                    file_path = os.path.join(util.getUserDirectoryPath(), item[1])
                    if not os.path.isfile(file_path):
                        file_path = util.getDirectoryPath(item[1])
                else:
                    continue
            elif isinstance(item, MateMenu.TreeDirectory):
                if item.get_desktop_file_path() is None:
                    continue
                file_path = os.path.join(util.getUserDirectoryPath(), os.path.split(item.get_desktop_file_path())[1])
                if not os.path.isfile(file_path):
                    file_path = item.get_desktop_file_path()
            elif isinstance(item, MateMenu.TreeEntry):
                file_path = os.path.join(util.getUserItemPath(), item.get_desktop_file_id())
                if not os.path.isfile(file_path):
                    file_path = item.get_desktop_file_path()
            else:
                continue
            with codecs.open(file_path, 'r', 'utf-8') as f:
                data = f.read()
            undo_path = util.getUniqueUndoFile(file_path)
            with codecs.open(undo_path, 'w', 'utf-8') as f:
                f.write(data)
            self.__undo[-1].append(undo_path)

    def __getMenu(self, item):
        root = item.get_parent()
        if not root:
            #already at the top
            root = item
        else:
            while True:
                if root.get_parent():
                    root = root.get_parent()
                else:
                    break
        if root.get_menu_id() == self.applications.tree.get_root_directory().get_menu_id():
            return self.applications
        return self.settings

    def __findMenu(self, menu_id, parent=None):
        if parent is None:
            menu = self.__findMenu(menu_id, self.applications.tree.get_root_directory())
            if menu is not None:
                return menu
            else:
                return self.__findMenu(menu_id, self.settings.tree.get_root_directory())
        if menu_id == self.applications.tree.get_root_directory().get_menu_id():
            return self.applications.tree.get_root_directory()
        if menu_id == self.settings.tree.get_root_directory().get_menu_id():
            return self.settings.tree.get_root_directory()

        item_iter = parent.iter()
        item_type = item_iter.next()
        while item_type != MateMenu.TreeItemType.INVALID:
            if item_type == MateMenu.TreeItemType.DIRECTORY:
                item = item_iter.get_directory()
                if item.get_menu_id() == menu_id:
                    return item
                menu = self.__findMenu(menu_id, item)
                if menu is not None:
                    return menu
            item_type = item_iter.next()

    def __isVisible(self, item):
        if isinstance(item, MateMenu.TreeEntry):
            app_info = item.get_app_info()
            return not (item.get_is_excluded() or app_info.get_nodisplay())
        menu = self.__getMenu(item)
        if menu == self.applications:
            root = self.applications.visible_tree.get_root_directory()
        elif menu == self.settings:
            root = self.settings.visible_tree.get_root_directory()
        if isinstance(item, MateMenu.TreeDirectory):
            if self.__findMenu(item.get_menu_id(), root) is None:
                return False
        return True

    def __getPath(self, menu):
        names = []
        current = menu
        while current is not None:
            names.append(current.get_menu_id())
            current = current.get_parent()

        # XXX - don't append root menu name, mozo doesn't
        # expect it. look into this more.
        names.pop(-1)
        return names[::-1]

    def __getXmlMenuPart(self, element, name):
        for node in self.__getXmlNodesByName('Menu', element):
            for child in self.__getXmlNodesByName('Name', node):
                if child.childNodes[0].nodeValue == name:
                    return node
        return None

    def __getXmlMenu(self, path, element, dom):
        if isinstance(path, str):
            return element
        for name in path:
            found = self.__getXmlMenuPart(element, name)
            if found is not None:
                element = found
            else:
                element = self.__addXmlMenuElement(element, name, dom)
        return element

    def __addXmlMenuElement(self, element, name, dom):
        if isinstance(name, bytes):
            name = name.decode('utf-8')

        node = dom.createElement('Menu')
        self.__addXmlTextElement(node, 'Name', name, dom)
        return element.appendChild(node)

    def __addXmlTextElement(self, element, name, text, dom):
        if isinstance(name, bytes):
            name = name.decode('utf-8')
        if isinstance(text, bytes):
            text = text.decode('utf-8')

        for temp in element.childNodes:
            if temp.nodeName == name:
                if temp.childNodes[0].nodeValue == text:
                    return
        node = dom.createElement(name)
        text = dom.createTextNode(text)
        node.appendChild(text)
        return element.appendChild(node)

    def __addXmlFilename(self, element, dom, filename, type = 'Include'):
        if isinstance(filename, bytes):
            filename = filename.decode('utf-8')

        # remove old filenames
        for node in self.__getXmlNodesByName(['Include', 'Exclude'], element):
            if node.childNodes[0].nodeName == 'Filename' and node.childNodes[0].childNodes[0].nodeValue == filename:
                element.removeChild(node)

        # add new filename
        node = dom.createElement(type)
        node.appendChild(self.__addXmlTextElement(node, 'Filename', filename, dom))
        return element.appendChild(node)

    def __addDeleted(self, element, dom):
        node = dom.createElement('Deleted')
        return element.appendChild(node)

    def __makeKeyFile(self, file_path, kwargs):
        if 'KeyFile' in kwargs:
            return kwargs['KeyFile']

        keyfile = GLib.KeyFile()

        if file_path is not None:
            keyfile.load_from_file(file_path, util.KEY_FILE_FLAGS)

        util.fillKeyFile(keyfile, kwargs)
        return keyfile

    def __writeItem(self, item, **kwargs):
        if item is not None:
            file_path = item.get_desktop_file_path()
        else:
            file_path = None

        keyfile = self.__makeKeyFile(file_path, kwargs)

        if item is not None:
            file_id = item.get_desktop_file_id()
        else:
            file_id = util.getUniqueFileId(keyfile.get_string(GLib.KEY_FILE_DESKTOP_GROUP, 'Name'), '.desktop')

        contents = keyfile.to_data()[0]

        with open(os.path.join(util.getUserItemPath(), file_id), 'w') as f:
            f.write(contents)
        return file_id

    def __writeMenu(self, menu, **kwargs):
        if menu is not None:
            file_id = os.path.split(menu.get_desktop_file_path())[1]
            file_path = menu.get_desktop_file_path()
            keyfile = GLib.KeyFile()
            keyfile.load_from_file(file_path, util.KEY_FILE_FLAGS)
        elif menu is None and 'Name' not in kwargs:
            raise Exception('New menus need a name')
        else:
            file_id = util.getUniqueFileId(kwargs['Name'], '.directory')
            keyfile = GLib.KeyFile()

        util.fillKeyFile(keyfile, kwargs)

        contents = keyfile.to_data()[0]

        with open(os.path.join(util.getUserDirectoryPath(), file_id), 'w') as f:
            f.write(contents)
        return file_id

    def __getXmlNodesByName(self, name, element):
        for child in element.childNodes:
            if child.nodeType == xml.dom.Node.ELEMENT_NODE:
                if isinstance(name, str) and child.nodeName == name:
                    yield child
                elif isinstance(name, list) or isinstance(name, tuple):
                    if child.nodeName in name:
                        yield child

    def __addXmlMove(self, element, old, new, dom):
        if not self.__undoMoves(element, old, new, dom):
            node = dom.createElement('Move')
            node.appendChild(self.__addXmlTextElement(node, 'Old', old, dom))
            node.appendChild(self.__addXmlTextElement(node, 'New', new, dom))
            #are parsed in reverse order, need to put at the beginning
            return element.insertBefore(node, element.firstChild)

    def __addXmlLayout(self, element, layout, dom):
        # remove old layout
        for node in self.__getXmlNodesByName('Layout', element):
            element.removeChild(node)

        # add new layout
        node = dom.createElement('Layout')
        for order in layout.order:
            if order[0] == 'Separator':
                child = dom.createElement('Separator')
                node.appendChild(child)
            elif order[0] == 'Filename':
                child = self.__addXmlTextElement(node, 'Filename', order[1], dom)
            elif order[0] == 'Menuname':
                child = self.__addXmlTextElement(node, 'Menuname', order[1], dom)
            elif order[0] == 'Merge':
                child = dom.createElement('Merge')
                child.setAttribute('type', order[1])
                node.appendChild(child)
        return element.appendChild(node)

    def __addXmlDefaultLayout(self, element, dom):
        # remove old default layout
        for node in self.__getXmlNodesByName('DefaultLayout', element):
            element.removeChild(node)

        # add new layout
        node = dom.createElement('DefaultLayout')
        node.setAttribute('inline', 'false')
        return element.appendChild(node)

    def __createLayout(self, items):
        layout = Layout()
        layout.order = []

        layout.order.append(['Merge', 'menus'])
        for item in items:
            if isinstance(item, tuple):
                if item[0] == 'Separator':
                    layout.parseSeparator()
                elif item[0] == 'Menu':
                    layout.parseMenuname(item[1])
                elif item[0] == 'Item':
                    layout.parseFilename(item[1])
            elif isinstance(item, MateMenu.TreeDirectory):
                layout.parseMenuname(item.get_menu_id())
            elif isinstance(item, MateMenu.TreeEntry):
                layout.parseFilename(item.get_desktop_file_id())
            elif isinstance(item, MateMenu.TreeSeparator):
                layout.parseSeparator()
        layout.order.append(['Merge', 'files'])
        return layout

    def __addItem(self, parent, file_id, dom):
        xml_parent = self.__getXmlMenu(self.__getPath(parent), dom.documentElement, dom)
        self.__addXmlFilename(xml_parent, dom, file_id, 'Include')

    def __positionItem(self, parent, item, before=None, after=None):
        contents = self.getContents(parent)
        if after:
            index = contents.index(after) + 1
        elif before:
            index = contents.index(before)
        else:
            # append the item to the list
            index = len(contents)
        #if this is a move to a new parent you can't remove the item
        if item in contents:
            # decrease the destination index, if we shorten the list
            if (before and (contents.index(item) < index)) \
                    or (after and (contents.index(item) < index - 1)):
                index -= 1
            contents.remove(item)
        contents.insert(index, item)
        layout = self.__createLayout(contents)
        dom = self.__getMenu(parent).dom
        menu_xml = self.__getXmlMenu(self.__getPath(parent), dom.documentElement, dom)
        self.__addXmlLayout(menu_xml, layout, dom)

    def __undoMoves(self, element, old, new, dom):
        nodes = []
        matches = []
        original_old = old
        final_old = old
        #get all <Move> elements
        for node in self.__getXmlNodesByName(['Move'], element):
            nodes.insert(0, node)
        #if the <New> matches our old parent we've found a stage to undo
        for node in nodes:
            xml_old = node.getElementsByTagName('Old')[0]
            xml_new = node.getElementsByTagName('New')[0]
            if xml_new.childNodes[0].nodeValue == old:
                matches.append(node)
                #we should end up with this path when completed
                final_old = xml_old.childNodes[0].nodeValue
        #undoing <Move>s
        for node in matches:
            element.removeChild(node)
        if len(matches) > 0:
            for node in nodes:
                xml_old = node.getElementsByTagName('Old')[0]
                xml_new = node.getElementsByTagName('New')[0]
                path = os.path.split(xml_new.childNodes[0].nodeValue)
                if path[0] == original_old:
                    element.removeChild(node)
                    for node in dom.getElementsByTagName('Menu'):
                        name_node = node.getElementsByTagName('Name')[0]
                        name = name_node.childNodes[0].nodeValue
                        if name == os.path.split(new)[1]:
                            #copy app and dir directory info from old <Menu>
                            root_path = dom.getElementsByTagName('Menu')[0].getElementsByTagName('Name')[0].childNodes[0].nodeValue
                            xml_menu = self.__getXmlMenu(root_path + '/' + new, dom.documentElement, dom)
                            for app_dir in node.getElementsByTagName('AppDir'):
                                xml_menu.appendChild(app_dir)
                            for dir_dir in node.getElementsByTagName('DirectoryDir'):
                                xml_menu.appendChild(dir_dir)
                            parent = node.parentNode
                            parent.removeChild(node)
                    node = dom.createElement('Move')
                    node.appendChild(self.__addXmlTextElement(node, 'Old', xml_old.childNodes[0].nodeValue, dom))
                    node.appendChild(self.__addXmlTextElement(node, 'New', os.path.join(new, path[1]), dom))
                    element.appendChild(node)
            if final_old == new:
                return True
            node = dom.createElement('Move')
            node.appendChild(self.__addXmlTextElement(node, 'Old', final_old, dom))
            node.appendChild(self.__addXmlTextElement(node, 'New', new, dom))
            return element.appendChild(node)

class Layout:
    def __init__(self, node=None):
        self.order = []

    def parseMenuname(self, value):
        self.order.append(['Menuname', value])

    def parseSeparator(self):
        self.order.append(['Separator'])

    def parseFilename(self, value):
        self.order.append(['Filename', value])

    def parseMerge(self, merge_type='all'):
        self.order.append(['Merge', merge_type])