File: url_image_preview.py

package info (click to toggle)
gajim-urlimagepreview 2.3.23-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 132 kB
  • sloc: python: 818; sh: 25; makefile: 2
file content (729 lines) | stat: -rw-r--r-- 28,627 bytes parent folder | download | duplicates (2)
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
# -*- coding: utf-8 -*-
##
## This file is part of Gajim.
##
## Gajim is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 3 only.
##
## Gajim 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Gajim.  If not, see <http://www.gnu.org/licenses/>.
##

import os
import hashlib
import binascii
import logging
import math
from urllib.parse import urlparse
from urllib.parse import unquote
from io import BytesIO
import shutil
from functools import partial

from gi.repository import Gtk, Gdk, GLib, GdkPixbuf

from gajim.common import app
from gajim.common import helpers
from gajim.common import configpaths

from gajim import dialogs
from gajim import gtkgui_helpers

from gajim.plugins import GajimPlugin
from gajim.plugins.helpers import log_calls
from gajim.plugins.plugins_i18n import _

from url_image_preview.http_functions import get_http_head, get_http_file
from url_image_preview.config_dialog import UrlImagePreviewConfigDialog

from gajim.gtk.filechoosers import FileSaveDialog
from gajim.gtk.util import get_cursor


log = logging.getLogger('gajim.plugin_system.preview')

ERROR_MSG = None
try:
    from PIL import Image
    from url_image_preview.resize_gif import resize_gif
except:
    log.debug('Pillow not available')
    ERROR_MSG = 'Please install python-pillow'

try:
    if os.name == 'nt':
        from cryptography.hazmat.backends.openssl import backend
    else:
        from cryptography.hazmat.backends import default_backend
    from cryptography.hazmat.primitives.ciphers import Cipher
    from cryptography.hazmat.primitives.ciphers import algorithms
    from cryptography.hazmat.primitives.ciphers.modes import GCM
    decryption_available = True
except Exception:
    DEP_MSG = 'For preview of encrypted images, ' \
              'please install python-cryptography!'
    log.exception('Error')
    log.info('Decryption/Encryption disabled due to errors')
    decryption_available = False

ACCEPTED_MIME_TYPES = ('image/png', 'image/jpeg', 'image/gif', 'image/raw',
                       'image/svg+xml', 'image/x-ms-bmp')


class UrlImagePreviewPlugin(GajimPlugin):
    @log_calls('UrlImagePreviewPlugin')
    def init(self):
        if ERROR_MSG:
            self.activatable = False
            self.available_text = ERROR_MSG
            self.config_dialog = None
            return

        if not decryption_available:
            self.available_text = DEP_MSG
        self.config_dialog = partial(UrlImagePreviewConfigDialog, self)
        self.gui_extension_points = {
            'chat_control_base': (self.connect_with_chat_control,
                                  self.disconnect_from_chat_control),
            'history_window':
                (self.connect_with_history, self.disconnect_from_history),
            'print_real_text': (self.print_real_text, None), }
        self.config_default_values = {
            'PREVIEW_SIZE': (150, 'Preview size(10-512)'),
            'MAX_FILE_SIZE': (5242880, 'Max file size for image preview'),
            'ALLOW_ALL_IMAGES': (False, ''),
            'LEFTCLICK_ACTION': ('open_menuitem', 'Open'),
            'ANONYMOUS_MUC': (False, ''),
            'GEO_PREVIEW_PROVIDER': ('Google', 'Google Maps'),
            'VERIFY': (True, ''),}
        self.controls = {}
        self.history_window_control = None

    @log_calls('UrlImagePreviewPlugin')
    def connect_with_chat_control(self, chat_control):
        account = chat_control.contact.account.name
        jid = chat_control.contact.jid
        if account not in self.controls:
            self.controls[account] = {}
        self.controls[account][jid] = Base(self, chat_control.conv_textview)

    @log_calls('UrlImagePreviewPlugin')
    def disconnect_from_chat_control(self, chat_control):
        account = chat_control.contact.account.name
        jid = chat_control.contact.jid
        self.controls[account][jid].deinit_handlers()
        del self.controls[account][jid]

    @log_calls('UrlImagePreviewPlugin')
    def connect_with_history(self, history_window):
        if self.history_window_control:
            self.history_window_control.deinit_handlers()
        self.history_window_control = Base(
            self, history_window.history_textview)

    @log_calls('UrlImagePreviewPlugin')
    def disconnect_from_history(self, history_window):
        if self.history_window_control:
            self.history_window_control.deinit_handlers()
        self.history_window_control = None

    def print_real_text(self, tv, real_text, text_tags, graphics,
                        iter_, additional_data):
        if tv.used_in_history_window and self.history_window_control:
            self.history_window_control.print_real_text(
                real_text, text_tags, graphics, iter_, additional_data)

        account = tv.account
        for jid in self.controls[account]:
            if self.controls[account][jid].textview != tv:
                continue
            self.controls[account][jid].print_real_text(
                real_text, text_tags, graphics, iter_, additional_data)
            return


class Base(object):
    def __init__(self, plugin, textview):
        self.plugin = plugin
        self.textview = textview
        self.handlers = {}

        self.directory = os.path.join(configpaths.get('MY_DATA'),
                                      'downloads')
        self.thumbpath = os.path.join(configpaths.get('MY_CACHE'),
                                      'downloads.thumb')

        try:
            self._create_path(self.directory)
            self._create_path(self.thumbpath)
        except Exception:
            log.error("Error creating download and/or thumbnail folder!")
            raise

    def deinit_handlers(self):
        # remove all register handlers on wigets, created by self.xml
        # to prevent circular references among objects
        for i in list(self.handlers.keys()):
            if self.handlers[i].handler_is_connected(i):
                self.handlers[i].disconnect(i)
            del self.handlers[i]

    def print_real_text(self, real_text, text_tags, graphics, iter_,
                        additional_data):

        if len(real_text.split(' ')) > 1:
            # urlparse dont recognises spaces as URL delimiter
            log.debug('Url with text will not be displayed: %s', real_text)
            return

        urlparts = urlparse(unquote(real_text))
        if not self._accept_uri(urlparts, real_text, additional_data):
            return

        # Don't print the URL in the message window (in the calling function)
        self.textview.plugin_modified = True

        buffer_ = self.textview.tv.get_buffer()
        if not iter_:
            iter_ = buffer_.get_end_iter()

        # Show URL, until image is loaded (if ever)
        ttt = buffer_.get_tag_table()
        repl_start = buffer_.create_mark(None, iter_, True)
        buffer_.insert_with_tags(iter_, real_text,
            *[(ttt.lookup(t) if isinstance(t, str) else t) for t in ["url"]])
        repl_end = buffer_.create_mark(None, iter_, True)

        # Handle geo:-URIs
        if real_text.startswith('geo:'):
            if self.plugin.config['GEO_PREVIEW_PROVIDER'] == 'no_preview':
                return
            size = self.plugin.config['PREVIEW_SIZE']
            geo_provider = self.plugin.config['GEO_PREVIEW_PROVIDER']
            key = ''
            iv = ''
            encrypted = False
            ext = '.png'
            color = 'blue'
            zoom = 16
            location = real_text[4:]
            lat, _, lon = location.partition(',')
            if lon == '':
                return

            filename = 'location_' + geo_provider + '_' \
                + location.replace(',', '_').replace('.', '-')
            newfilename = filename + ext
            thumbfilename = filename + '_thumb_' \
                + str(self.plugin.config['PREVIEW_SIZE']) + ext
            filepath = os.path.join(self.directory, newfilename)
            thumbpath = os.path.join(self.thumbpath, thumbfilename)
            filepaths = [filepath, thumbpath]

            # Google
            if geo_provider == 'Google':
                url = 'https://maps.googleapis.com/maps/api/staticmap?' \
                      'center={}&zoom={}&size={}x{}&markers=color:{}' \
                      '|label:.|{}'.format(location, zoom, size, size,
                                           color, location)
                weburl = 'https://www.google.com/maps/place/{}' \
                         .format(location)
                real_text = url
            else:
                # OpenStreetMap / MapQuest
                apikey = 'F7x36jLVv2hiANVAXmhwvUB044XvGASh'

                url = 'https://open.mapquestapi.com/staticmap/v4/' \
                      'getmap?key={}&center={}&zoom={}&size={},{}&type=map' \
                      '&imagetype=png&pois={},{}&scalebar=false' \
                      .format(apikey, location, zoom, size, size, color,
                              location)
                weburl = 'http://www.openstreetmap.org/' \
                         '?mlat={}&mlon={}#map={}/{}/{}&layers=N' \
                         .format(lat, lon, zoom, lat, lon)
                real_text = url
        else:
            weburl = real_text
            filename = os.path.basename(urlparts.path)
            ext = os.path.splitext(filename)[1]
            name = os.path.splitext(filename)[0]
            if len(name) > 90:
                # Many Filesystems have a limit on filename length
                # Most have 255, some encrypted ones only 143
                # We add around 50 chars for the hash,
                # so the filename should not exceed 90
                name = name[:90]
            namehash = hashlib.sha1(real_text.encode('utf-8')).hexdigest()
            newfilename = name + '_' + namehash + ext
            thumbfilename = name + '_' + namehash + '_thumb_' \
                + str(self.plugin.config['PREVIEW_SIZE']) + ext

            filepath = os.path.join(self.directory, newfilename)
            thumbpath = os.path.join(self.thumbpath, thumbfilename)
            filepaths = [filepath, thumbpath]

            key = ''
            iv = ''
            encrypted = False
            if urlparts.fragment:
                fragment = binascii.unhexlify(urlparts.fragment)
                key = fragment[16:]
                iv = fragment[:16]
                if len(key) == 32 and len(iv) == 16:
                    encrypted = True
                if not encrypted:
                    key = fragment[12:]
                    iv = fragment[:12]
                    if len(key) == 32 and len(iv) == 12:
                        encrypted = True

        # file exists but thumbnail got deleted
        if os.path.exists(filepath) and not os.path.exists(thumbpath):
            if urlparts.scheme == 'geo':
                    real_text = weburl
            with open(filepath, 'rb') as f:
                mem = f.read()
            app.thread_interface(
                self._save_thumbnail, [thumbpath, mem],
                self._update_img, [real_text, repl_start,
                                   repl_end, filepath, encrypted])

        # display thumbnail if already downloadeded
        # (but only if file also exists)
        elif os.path.exists(filepath) and os.path.exists(thumbpath):
            if urlparts.scheme == 'geo':
                    real_text = weburl
            app.thread_interface(
                self._load_thumbnail, [thumbpath],
                self._update_img, [real_text, repl_start,
                                   repl_end, filepath, encrypted])

        # or download file, calculate thumbnail and finally display it
        else:
            if encrypted and not decryption_available:
                log.debug('Please install Crytography to decrypt pictures')
            else:
                # First get the http head request
                # which does not fetch data, just headers
                # then check the mime type and filesize
                if urlparts.scheme == 'aesgcm':
                    real_text = 'https://' + real_text[9:]
                verify = self.plugin.config['VERIFY']
                app.thread_interface(
                    get_http_head, [self.textview.account, real_text, verify],
                    self._check_mime_size, [real_text, weburl, repl_start,
                                            repl_end, filepaths, key, iv,
                                            encrypted])

    def _accept_uri(self, urlparts, real_text, additional_data):
        try:
            oob_url = additional_data["gajim"]["oob_url"]
        except (KeyError, AttributeError):
            oob_url = None

        if not urlparts.netloc:
            log.info('No netloc found in URL %s', real_text)
            return False

        # geo
        if urlparts.scheme == "geo":
            if self.plugin.config['GEO_PREVIEW_PROVIDER'] == 'no_preview':
                log.info('geo: link preview is disabled')
                return False
            return True

        # aesgcm
        if urlparts.scheme == 'aesgcm':
            return True

        # https
        if urlparts.scheme == 'https':
            if real_text == oob_url or self.plugin.config['ALLOW_ALL_IMAGES']:
                return True
            log.info('Incorrect oob data found')
            return False

        log.info('Not supported URI scheme found: %s', real_text)
        return False

    def _save_thumbnail(self, thumbpath, mem):
        size = self.plugin.config['PREVIEW_SIZE']

        try:
            loader = GdkPixbuf.PixbufLoader()
            loader.write(mem)
            loader.close()
            if loader.get_format().get_name() == 'gif':
                pixbuf = loader.get_animation()
            else:
                pixbuf = loader.get_pixbuf()
        except GLib.GError as error:
            log.info('Failed to load image using Gdk.Pixbuf')
            log.debug(error)

            # Try Pillow
            image = Image.open(BytesIO(mem)).convert("RGBA")
            array = GLib.Bytes.new(image.tobytes())
            width, height = image.size
            pixbuf = GdkPixbuf.Pixbuf.new_from_bytes(
                array, GdkPixbuf.Colorspace.RGB, True,
                8, width, height, width * 4)

        try:
            self._create_path(os.path.dirname(thumbpath))
            thumbnail = pixbuf
            if isinstance(pixbuf, GdkPixbuf.PixbufAnimation):
                if size < pixbuf.get_width() or size < pixbuf.get_height():
                    resize_gif(mem, thumbpath, (size, size))
                    thumbnail = self._load_thumbnail(thumbpath)
                else:
                    self._write_file(thumbpath, mem)
            else:
                width, height = self._get_thumbnail_size(pixbuf, size)
                thumbnail = pixbuf.scale_simple(
                    width, height, GdkPixbuf.InterpType.BILINEAR)
                thumbnail.savev(thumbpath, 'png', [], [])
        except Exception as error:
            GLib.idle_add(
                self._raise_error_dialog,
                _('Could not save file'),
                _('Exception raised while saving thumbnail '
                  'for image file (see error log for more '
                  'information)'))
            log.exception(error)
            return
        return thumbnail

    @staticmethod
    def _get_thumbnail_size(pixbuf, size):
        # Calculates the new thumbnail size while preserving the aspect ratio
        image_width = pixbuf.get_width()
        image_height = pixbuf.get_height()

        if image_width > image_height:
            if image_width > size:
                image_height = math.ceil((size / float(image_width) * image_height))
                image_width = int(size)
        else:
            if image_height > size:
                image_width = math.ceil((size / float(image_height) * image_width))
                image_height = int(size)

        return image_width, image_height

    @staticmethod
    def _load_thumbnail(thumbpath):
        ext = os.path.splitext(thumbpath)[1]
        if ext == '.gif':
            return GdkPixbuf.PixbufAnimation.new_from_file(thumbpath)
        return GdkPixbuf.Pixbuf.new_from_file(thumbpath)

    @staticmethod
    def _write_file(path, data):
        log.info("Writing '%s' of size %d...", path, len(data))
        try:
            with open(path, "wb") as output_file:
                output_file.write(data)
                output_file.closed
        except Exception as e:
            log.error("Failed to write file '%s'!", path)
            raise

    def _get_at_end(self):
        try:
            # Gajim 1.0.0
            return self.textview.at_the_end()
        except AttributeError:
            # Gajim 1.0.1
            return self.textview.autoscroll

    def _scroll_to_end(self):
        try:
            # Gajim 1.0.0
            self.textview.scroll_to_end_iter()
        except AttributeError:
            # Gajim 1.0.1
            self.textview.scroll_to_end()

    def _update_img(self, pixbuf, url, repl_start, repl_end,
                    filepath, encrypted):
        if pixbuf is None:
            # If image could not be downloaded, URL is already displayed
            log.error('Could not download image for URL: %s', url)
            return

        urlparts = urlparse(unquote(url))
        filename = os.path.basename(urlparts.path)
        if os.path.basename(filepath).startswith('location_'):
            filename = os.path.basename(filepath)

        def add_to_textview():
            try:
                at_end = self._get_at_end()

                buffer_ = repl_start.get_buffer()
                iter_ = buffer_.get_iter_at_mark(repl_start)
                buffer_.insert(iter_, "\n")
                anchor = buffer_.create_child_anchor(iter_)
                anchor.plaintext = url

                image = self._create_clickable_image(pixbuf, url)

                self.textview.tv.add_child_at_anchor(image, anchor)
                buffer_.delete(iter_,
                               buffer_.get_iter_at_mark(repl_end))

                image.connect(
                    'button-press-event', self.on_button_press_event,
                    filepath, filename, url, encrypted)
                image.get_window().set_cursor(get_cursor('HAND2'))

                if at_end:
                    self._scroll_to_end()
            except Exception as ex:
                log.exception("Exception while loading %s: %s", url, ex)
            return False
        # add to mainloop --> make call threadsafe
        GLib.idle_add(add_to_textview)

    def _create_clickable_image(self, pixbuf, url):
        if isinstance(pixbuf, GdkPixbuf.PixbufAnimation):
            image = Gtk.Image.new_from_animation(pixbuf)
        else:
            image = Gtk.Image.new_from_pixbuf(pixbuf)

        css = '''#Preview {
        box-shadow: 0px 0px 3px 0px alpha(@theme_text_color, 0.2);
        margin: 5px 10px 5px 10px; }'''
        gtkgui_helpers.add_css_to_widget(image, css)
        image.set_name('Preview')

        event_box = Gtk.EventBox()
        event_box.set_tooltip_text(url)
        event_box.add(image)
        event_box.show_all()
        return event_box

    def _check_mime_size(self, tuple_arg,
                         url, weburl, repl_start, repl_end, filepaths,
                         key, iv, encrypted):
        file_mime, file_size = tuple_arg
        # Check if mime type is acceptable
        if not file_mime or not file_size:
            log.info("Failed to load HEAD Request for URL: '%s' "
                     "mime: %s, size: %s", url, file_mime, file_size)
            # URL is already displayed
            return
        if file_mime.lower() not in ACCEPTED_MIME_TYPES:
            log.info("Not accepted mime type '%s' for URL: '%s'",
                     file_mime.lower(), url)
            # URL is already displayed
            return
        # Check if file size is acceptable
        max_size = int(self.plugin.config['MAX_FILE_SIZE'])
        if file_size > max_size or file_size == 0:
            log.info("File size (%s) too big or unknown (zero) for URL: '%s'",
                     file_size, url)
            # URL is already displayed
            return

        attributes = {'src': url,
                      'verify': self.plugin.config['VERIFY'],
                      'max_size': max_size,
                      'filepaths': filepaths,
                      'key': key,
                      'iv': iv}

        app.thread_interface(
            self._download_image, [self.textview.account,
                                   attributes, encrypted],
            self._update_img, [weburl, repl_start, repl_end,
                               filepaths[0], encrypted])

    def _download_image(self, account, attributes, encrypted):
        filepath = attributes['filepaths'][0]
        thumbpath = attributes['filepaths'][1]
        key = attributes['key']
        iv = attributes['iv']
        mem, alt = get_http_file(account, attributes)

        # Decrypt file if necessary
        if encrypted:
            mem = self._aes_decrypt_fast(key, iv, mem)

        try:
            # Write file to harddisk
            self._write_file(filepath, mem)
        except Exception as e:
            GLib.idle_add(
                self._raise_error_dialog,
                _('Could not save file'),
                _('Exception raised while saving image file'
                  ' (see error log for more information)'))
            log.error(str(e))

        # Create thumbnail, write it to harddisk and return it
        return self._save_thumbnail(thumbpath, mem)

    def _create_path(self, folder):
        if os.path.exists(folder):
            return
        log.debug("creating folder '%s'" % folder)
        os.mkdir(folder, 0o700)

    def _aes_decrypt_fast(self, key, iv, payload):
        # Use AES128 GCM with the given key and iv to decrypt the payload.
        if os.name == 'nt':
            be = backend
        else:
            be = default_backend()
        data = payload[:-16]
        tag = payload[-16:]
        decryptor = Cipher(
            algorithms.AES(key),
            GCM(iv, tag=tag),
            backend=be).decryptor()
        return decryptor.update(data) + decryptor.finalize()

    def make_rightclick_menu(self, event, data):
        xml = Gtk.Builder()
        xml.set_translation_domain('gajim_plugins')
        xml.add_from_file(self.plugin.local_file_path('context_menu.ui'))
        menu = xml.get_object('context_menu')

        open_menuitem = xml.get_object('open_menuitem')
        save_as_menuitem = xml.get_object('save_as_menuitem')
        copy_link_location_menuitem = \
            xml.get_object('copy_link_location_menuitem')
        open_link_in_browser_menuitem = \
            xml.get_object('open_link_in_browser_menuitem')
        open_file_in_browser_menuitem = \
            xml.get_object('open_file_in_browser_menuitem')
        extras_separator = \
            xml.get_object('extras_separator')

        if data["encrypted"]:
            open_link_in_browser_menuitem.hide()
        if app.config.get('autodetect_browser_mailer') \
                or app.config.get('custombrowser') == '':
            extras_separator.hide()
            open_file_in_browser_menuitem.hide()

        id_ = open_menuitem.connect(
            'activate', self.on_open_menuitem_activate, data)
        self.handlers[id_] = open_menuitem
        id_ = save_as_menuitem.connect(
            'activate', self.on_save_as_menuitem_activate_new, data)
        self.handlers[id_] = save_as_menuitem
        id_ = copy_link_location_menuitem.connect(
            'activate', self.on_copy_link_location_menuitem_activate, data)
        self.handlers[id_] = copy_link_location_menuitem
        id_ = open_link_in_browser_menuitem.connect(
            'activate', self.on_open_link_in_browser_menuitem_activate, data)
        self.handlers[id_] = open_link_in_browser_menuitem
        id_ = open_file_in_browser_menuitem.connect(
            'activate', self.on_open_file_in_browser_menuitem_activate, data)
        self.handlers[id_] = open_file_in_browser_menuitem

        return menu

    def on_open_menuitem_activate(self, menu, data):
        filepath = data["filepath"]
        original_filename = data["original_filename"]
        url = data["url"]
        if original_filename.startswith('location_'):
            helpers.launch_browser_mailer('url', url)
            return
        helpers.launch_file_manager(filepath)

    def on_save_as_menuitem_activate_new(self, menu, data):
        filepath = data["filepath"]
        original_filename = data["original_filename"]

        def on_ok(target_path):
            dirname = os.path.dirname(target_path)
            if not os.access(dirname, os.W_OK):
                dialogs.ErrorDialog(
                    _('Directory "%s" is not writable') % dirname,
                    _('You do not have permission to '
                      'create files in this directory.'))
                return
            shutil.copy(filepath, target_path)

        FileSaveDialog(on_ok,
                       path=app.config.get('last_save_dir'),
                       file_name=original_filename,
                       transient_for=app.app.get_active_window())

    def on_copy_link_location_menuitem_activate(self, menu, data):
        url = data["url"]
        clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
        clipboard.set_text(url, -1)
        clipboard.store()

    def on_open_link_in_browser_menuitem_activate(self, menu, data):
        url = data["url"]
        if data["encrypted"]:
            dialogs.ErrorDialog(
                _('Encrypted file'),
                _('You cannot open encrypted files in your '
                  'browser directly. Try "Open Downloaded File '
                  'in Browser" instead.'),
                transient_for=app.app.get_active_window())
        else:
            helpers.launch_browser_mailer('url', url)

    def on_open_file_in_browser_menuitem_activate(self, menu, data):
        if os.name == "nt":
            filepath = "file://" + os.path.abspath(data["filepath"])
        else:
            filepath = "file://" + data["filepath"]
        if app.config.get('autodetect_browser_mailer') \
                or app.config.get('custombrowser') == '':
            dialogs.ErrorDialog(
                _('Cannot open downloaded file in browser'),
                _('You have to set a custom browser executable '
                  'in your gajim settings for this to work.'),
                transient_for=app.app.get_active_window())
            return
        command = app.config.get('custombrowser')
        command = helpers.build_command(command, filepath)
        try:
            helpers.exec_command(command)
        except Exception:
            pass

    def on_button_press_event(self, eb, event, filepath,
                              original_filename, url, encrypted):
        data = {"filepath": filepath,
                "original_filename": original_filename,
                "url": url,
                "encrypted": encrypted}
        # left click
        if event.type == Gdk.EventType.BUTTON_PRESS and event.button == 1:
            method = getattr(self, "on_"
                             + self.plugin.config['LEFTCLICK_ACTION']
                             + "_activate")
            method(event, data)
        # right klick
        elif event.type == Gdk.EventType.BUTTON_PRESS and event.button == 3:
            menu = self.make_rightclick_menu(event, data)
            # menu.attach_to_widget(self.tv, None)
            # menu.popup(None, None, None, event.button, event.time)
            menu.popup_at_pointer(event)

    @staticmethod
    def _raise_error_dialog(pritext, sectext):
        # Used by methods that run in a different thread
        dialogs.ErrorDialog(pritext,
                            sectext,
                            transient_for=app.app.get_active_window())

    def disconnect_from_chat_control(self):
        pass