Script: go.py

Quick jump to buffers.
Author: FlashCode — Version: 2.9 — License: GPL3
For WeeChat ≥ 0.3.0.
Tags: buffer, py2, py3
Added: 2009-02-08 — Updated: 2023-06-21

Download GitHub Repository

  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
# -*- coding: utf-8 -*-
#
# Copyright (C) 2009-2023 Sébastien Helleu <flashcode@flashtux.org>
# Copyright (C) 2010 m4v <lambdae2@gmail.com>
# Copyright (C) 2011 stfn <stfnmd@googlemail.com>
#
# This program 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; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#

#
# History:
#
# 2023-06-21, Sébastien Helleu <flashcode@flashtux.org>:
#     version 2.9: add option "min_chars"
# 2023-01-08, Sébastien Helleu <flashcode@flashtux.org>:
#     version 2.8: send buffer pointer with signal "input_text_changed"
# 2021-05-25, Tomáš Janoušek <tomi@nomi.cz>:
#     version 2.7: add new option to prefix short names with server names
# 2019-07-11, Simmo Saan <simmo.saan@gmail.com>
#     version 2.6: fix detection of "/input search_text_here"
# 2017-04-01, Sébastien Helleu <flashcode@flashtux.org>:
#     version 2.5: add option "buffer_number"
# 2017-03-02, Sébastien Helleu <flashcode@flashtux.org>:
#     version 2.4: fix syntax and indentation error
# 2017-02-25, Simmo Saan <simmo.saan@gmail.com>
#     version 2.3: fix fuzzy search breaking buffer number search display
# 2016-01-28, ylambda <ylambda@koalabeast.com>
#     version 2.2: add option "fuzzy_search"
# 2015-11-12, nils_2 <weechatter@arcor.de>
#     version 2.1: fix problem with buffer short_name "weechat", using option
#                  "use_core_instead_weechat", see:
#                  https://github.com/weechat/weechat/issues/574
# 2014-05-12, Sébastien Helleu <flashcode@flashtux.org>:
#     version 2.0: add help on options, replace option "sort_by_activity" by
#                  "sort" (add sort by name and first match at beginning of
#                  name and by number), PEP8 compliance
# 2012-11-26, Nei <anti.teamidiot.de>
#     version 1.9: add auto_jump option to automatically go to buffer when it
#                  is uniquely selected
# 2012-09-17, Sébastien Helleu <flashcode@flashtux.org>:
#     version 1.8: fix jump to non-active merged buffers (jump with buffer name
#                  instead of number)
# 2012-01-03 nils_2 <weechatter@arcor.de>
#     version 1.7: add option "use_core_instead_weechat"
# 2012-01-03, Sébastien Helleu <flashcode@flashtux.org>:
#     version 1.6: make script compatible with Python 3.x
# 2011-08-24, stfn <stfnmd@googlemail.com>:
#     version 1.5: /go with name argument jumps directly to buffer
#                  Remember cursor position in buffer input
# 2011-05-31, Elián Hanisch <lambdae2@gmail.com>:
#     version 1.4: Sort list of buffers by activity.
# 2011-04-25, Sébastien Helleu <flashcode@flashtux.org>:
#     version 1.3: add info "go_running" (used by script input_lock.rb)
# 2010-11-01, Sébastien Helleu <flashcode@flashtux.org>:
#     version 1.2: use high priority for hooks to prevent conflict with other
#                  plugins/scripts (WeeChat >= 0.3.4 only)
# 2010-03-25, Elián Hanisch <lambdae2@gmail.com>:
#     version 1.1: use a space to match the end of a string
# 2009-11-16, Sébastien Helleu <flashcode@flashtux.org>:
#     version 1.0: add new option to display short names
# 2009-06-15, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.9: fix typo in /help go with command /key
# 2009-05-16, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.8: search buffer by number, fix bug when window is split
# 2009-05-03, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.7: eat tab key (do not complete input, just move buffer
#                  pointer)
# 2009-05-02, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.6: sync with last API changes
# 2009-03-22, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.5: update modifier signal name for input text display,
#                  fix arguments for function string_remove_color
# 2009-02-18, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.4: do not hook command and init options if register failed
# 2009-02-08, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.3: case insensitive search for buffers names
# 2009-02-08, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.2: add help about Tab key
# 2009-02-08, Sébastien Helleu <flashcode@flashtux.org>:
#     version 0.1: initial release
#

"""
Quick jump to buffers.
(this script requires WeeChat 0.3.0 or newer)
"""

from __future__ import print_function

SCRIPT_NAME = 'go'
SCRIPT_AUTHOR = 'Sébastien Helleu <flashcode@flashtux.org>'
SCRIPT_VERSION = '2.9'
SCRIPT_LICENSE = 'GPL3'
SCRIPT_DESC = 'Quick jump to buffers'

SCRIPT_COMMAND = 'go'

IMPORT_OK = True

try:
    import weechat
except ImportError:
    print('This script must be run under WeeChat.')
    print('Get WeeChat now at: https://weechat.org/')
    IMPORT_OK = False

import re

# script options
SETTINGS = {
    'auto_jump': (
        'off',
        'automatically jump to buffer when it is uniquely selected'),
    'buffer_number': (
        'on',
        'display buffer number'),
    'color_number': (
        'yellow,magenta',
        'color for buffer number (not selected)'),
    'color_number_selected': (
        'yellow,red',
        'color for selected buffer number'),
    'color_name': (
        'black,cyan',
        'color for buffer name (not selected)'),
    'color_name_selected': (
        'black,brown',
        'color for a selected buffer name'),
    'color_name_highlight': (
        'red,cyan',
        'color for highlight in buffer name (not selected)'),
    'color_name_highlight_selected': (
        'red,brown',
        'color for highlight in a selected buffer name'),
    'fuzzy_search': (
        'off',
        'search buffer matches using approximation'),
    'message': (
        'Go to: ',
        'message to display before list of buffers'),
    'min_chars': (
        '0',
        'Minimum chars to search and display list of matching buffers'),
    'short_name': (
        'off',
        'display and search in short names instead of buffer name'),
    'short_name_server': (
        'off',
        'prefix short names with server names for search and display'),
    'sort': (
        'number,beginning',
        'comma-separated list of keys to sort buffers '
        '(the order is important, sorts are performed in the given order): '
        'name = sort by name (or short name), ',
        'hotlist = sort by hotlist order, '
        'number = first match a buffer number before digits in name, '
        'beginning = first match at beginning of names (or short names); '
        'the default sort of buffers is by numbers'),
    'use_core_instead_weechat': (
        'off',
        'use name "core" instead of "weechat" for core buffer'),
}

# hooks management
HOOK_COMMAND_RUN = {
    'input': ('/input *', 'go_command_run_input'),
    'buffer': ('/buffer *', 'go_command_run_buffer'),
    'window': ('/window *', 'go_command_run_window'),
}
hooks = {}

# input before command /go (we'll restore it later)
saved_input = ''
saved_input_pos = 0

# last user input (if changed, we'll update list of matching buffers)
old_input = None

# matching buffers
buffers = []
buffers_pos = 0


def go_option_enabled(option):
    """Checks if a boolean script option is enabled or not."""
    return weechat.config_string_to_boolean(weechat.config_get_plugin(option))


def go_info_running(data, info_name, arguments):
    """Returns "1" if go is running, otherwise "0"."""
    return '1' if 'modifier' in hooks else '0'


def go_unhook_one(hook):
    """Unhook something hooked by this script."""
    global hooks
    if hook in hooks:
        weechat.unhook(hooks[hook])
        del hooks[hook]


def go_unhook_all():
    """Unhook all."""
    go_unhook_one('modifier')
    for hook in HOOK_COMMAND_RUN:
        go_unhook_one(hook)


def go_hook_all():
    """Hook command_run and modifier."""
    global hooks
    priority = ''
    version = weechat.info_get('version_number', '') or 0
    # use high priority for hook to prevent conflict with other plugins/scripts
    # (WeeChat >= 0.3.4 only)
    if int(version) >= 0x00030400:
        priority = '2000|'
    for hook, value in HOOK_COMMAND_RUN.items():
        if hook not in hooks:
            hooks[hook] = weechat.hook_command_run(
                '%s%s' % (priority, value[0]),
                value[1], '')
    if 'modifier' not in hooks:
        hooks['modifier'] = weechat.hook_modifier(
            'input_text_display_with_cursor', 'go_input_modifier', '')


def go_start(buf):
    """Start go on buffer."""
    global saved_input, saved_input_pos, old_input, buffers_pos
    go_hook_all()
    saved_input = weechat.buffer_get_string(buf, 'input')
    saved_input_pos = weechat.buffer_get_integer(buf, 'input_pos')
    weechat.buffer_set(buf, 'input', '')
    old_input = None
    buffers_pos = 0


def go_end(buf):
    """End go on buffer."""
    global saved_input, saved_input_pos, old_input
    go_unhook_all()
    weechat.buffer_set(buf, 'input', saved_input)
    weechat.buffer_set(buf, 'input_pos', str(saved_input_pos))
    old_input = None


def go_match_beginning(buf, string):
    """Check if a string matches the beginning of buffer name/short name."""
    if not string:
        return False
    esc_str = re.escape(string)
    if re.search(r'^#?' + esc_str, buf['name']) \
            or re.search(r'^#?' + esc_str, buf['short_name']):
        return True
    return False


def go_match_fuzzy(name, string):
    """Check if string matches name using approximation."""
    if not string:
        return False

    name_len = len(name)
    string_len = len(string)

    if string_len > name_len:
        return False
    if name_len == string_len:
        return name == string

    # Attempt to match all chars somewhere in name
    prev_index = -1
    for i, char in enumerate(string):
        index = name.find(char, prev_index+1)
        if index == -1:
            return False
        prev_index = index
    return True


def go_now(buf, args):
    """Go to buffer specified by args."""
    listbuf = go_matching_buffers(args)
    if not listbuf:
        return

    # prefer buffer that matches at beginning (if option is enabled)
    if 'beginning' in weechat.config_get_plugin('sort').split(','):
        for index in range(len(listbuf)):
            if go_match_beginning(listbuf[index], args):
                weechat.command(buf,
                                '/buffer ' + str(listbuf[index]['full_name']))
                return

    # jump to first buffer in matching buffers by default
    weechat.command(buf, '/buffer ' + str(listbuf[0]['full_name']))


def go_cmd(data, buf, args):
    """Command "/go": just hook what we need."""
    global hooks
    if args:
        go_now(buf, args)
    elif 'modifier' in hooks:
        go_end(buf)
    else:
        go_start(buf)
    return weechat.WEECHAT_RC_OK


def go_matching_buffers(strinput):
    """Return a list with buffers matching user input."""
    global buffers_pos
    listbuf = []
    if len(strinput) == 0:
        buffers_pos = 0
    strinput = strinput.lower()
    infolist = weechat.infolist_get('buffer', '', '')
    while weechat.infolist_next(infolist):
        pointer = weechat.infolist_pointer(infolist, 'pointer')
        short_name = weechat.infolist_string(infolist, 'short_name')
        server = weechat.buffer_get_string(pointer, 'localvar_server')
        if go_option_enabled('short_name'):
            if go_option_enabled('short_name_server') and server:
                name = server + '.' + short_name
            else:
                name = short_name
        else:
            name = weechat.infolist_string(infolist, 'name')
        if name == 'weechat' \
                and go_option_enabled('use_core_instead_weechat') \
                and weechat.infolist_string(infolist, 'plugin_name') == 'core':
            name = 'core'
        number = weechat.infolist_integer(infolist, 'number')
        full_name = weechat.infolist_string(infolist, 'full_name')
        if not full_name:
            full_name = '%s.%s' % (
                weechat.infolist_string(infolist, 'plugin_name'),
                weechat.infolist_string(infolist, 'name'))
        matching = name.lower().find(strinput) >= 0
        if not matching and strinput[-1] == ' ':
            matching = name.lower().endswith(strinput.strip())
        if not matching and go_option_enabled('fuzzy_search'):
            matching = go_match_fuzzy(name.lower(), strinput)
        if not matching and strinput.isdigit():
            matching = str(number).startswith(strinput)
        if len(strinput) == 0 or matching:
            listbuf.append({
                'number': number,
                'short_name': short_name,
                'name': name,
                'full_name': full_name,
                'pointer': pointer,
            })
    weechat.infolist_free(infolist)

    # sort buffers
    hotlist = []
    infolist = weechat.infolist_get('hotlist', '', '')
    while weechat.infolist_next(infolist):
        hotlist.append(
            weechat.infolist_pointer(infolist, 'buffer_pointer'))
    weechat.infolist_free(infolist)
    last_index_hotlist = len(hotlist)

    def _sort_name(buf):
        """Sort buffers by name (or short name)."""
        return buf['name']

    def _sort_hotlist(buf):
        """Sort buffers by hotlist order."""
        try:
            return hotlist.index(buf['pointer'])
        except ValueError:
            # not in hotlist, always last.
            return last_index_hotlist

    def _sort_match_number(buf):
        """Sort buffers by match on number."""
        return 0 if str(buf['number']) == strinput else 1

    def _sort_match_beginning(buf):
        """Sort buffers by match at beginning."""
        return 0 if go_match_beginning(buf, strinput) else 1

    funcs = {
        'name': _sort_name,
        'hotlist': _sort_hotlist,
        'number': _sort_match_number,
        'beginning': _sort_match_beginning,
    }

    for key in weechat.config_get_plugin('sort').split(','):
        if key in funcs:
            listbuf = sorted(listbuf, key=funcs[key])

    if not strinput:
        index = [i for i, buf in enumerate(listbuf)
                 if buf['pointer'] == weechat.current_buffer()]
        if index:
            buffers_pos = index[0]

    return listbuf


def go_buffers_to_string(listbuf, pos, strinput):
    """Return string built with list of buffers found (matching user input)."""
    try:
        if len(strinput) < int(weechat.config_get_plugin('min_chars')):
            return ''
    except:
        pass
    string = ''
    strinput = strinput.lower()
    for i in range(len(listbuf)):
        selected = '_selected' if i == pos else ''
        buffer_name = listbuf[i]['name']
        index = buffer_name.lower().find(strinput)
        if index >= 0:
            index2 = index + len(strinput)
            name = '%s%s%s%s%s' % (
                buffer_name[:index],
                weechat.color(weechat.config_get_plugin(
                    'color_name_highlight' + selected)),
                buffer_name[index:index2],
                weechat.color(weechat.config_get_plugin(
                    'color_name' + selected)),
                buffer_name[index2:])
        elif go_option_enabled("fuzzy_search") and \
                go_match_fuzzy(buffer_name.lower(), strinput):
            name = ""
            prev_index = -1
            for char in strinput.lower():
                index = buffer_name.lower().find(char, prev_index+1)
                if prev_index < 0:
                    name += buffer_name[:index]
                    name += weechat.color(weechat.config_get_plugin(
                        'color_name_highlight' + selected))
                if prev_index >= 0 and index > prev_index+1:
                    name += weechat.color(weechat.config_get_plugin(
                        'color_name' + selected))
                    name += buffer_name[prev_index+1:index]
                    name += weechat.color(weechat.config_get_plugin(
                        'color_name_highlight' + selected))
                name += buffer_name[index]
                prev_index = index

            name += weechat.color(weechat.config_get_plugin(
                'color_name' + selected))
            name += buffer_name[prev_index+1:]
        else:
            name = buffer_name
        string += ' '
        if go_option_enabled('buffer_number'):
            string += '%s%s' % (
                weechat.color(weechat.config_get_plugin(
                    'color_number' + selected)),
                str(listbuf[i]['number']))
        string += '%s%s%s' % (
            weechat.color(weechat.config_get_plugin(
                'color_name' + selected)),
            name,
            weechat.color('reset'))
    return '  ' + string if string else ''


def go_input_modifier(data, modifier, modifier_data, string):
    """This modifier is called when input text item is built by WeeChat.

    This is commonly called after changes in input or cursor move: it builds
    a new input with prefix ("Go to:"), and suffix (list of buffers found).
    """
    global old_input, buffers, buffers_pos
    if modifier_data != weechat.current_buffer():
        return ''
    names = ''
    new_input = weechat.string_remove_color(string, '')
    new_input = new_input.lstrip()
    if old_input is None or new_input != old_input:
        old_buffers = buffers
        buffers = go_matching_buffers(new_input)
        if buffers != old_buffers and len(new_input) > 0:
            if len(buffers) == 1 and go_option_enabled('auto_jump'):
                weechat.command(modifier_data, '/wait 1ms /input return')
            buffers_pos = 0
        old_input = new_input
    names = go_buffers_to_string(buffers, buffers_pos, new_input.strip())
    return weechat.config_get_plugin('message') + string + names


def go_command_run_input(data, buf, command):
    """Function called when a command "/input xxx" is run."""
    global buffers, buffers_pos
    if command.startswith('/input search_text') or command.startswith('/input jump'):
        # search text or jump to another buffer is forbidden now
        return weechat.WEECHAT_RC_OK_EAT
    elif command == '/input complete_next':
        # choose next buffer in list
        buffers_pos += 1
        if buffers_pos >= len(buffers):
            buffers_pos = 0
        weechat.hook_signal_send('input_text_changed',
                                 weechat.WEECHAT_HOOK_SIGNAL_POINTER, buf)
        return weechat.WEECHAT_RC_OK_EAT
    elif command == '/input complete_previous':
        # choose previous buffer in list
        buffers_pos -= 1
        if buffers_pos < 0:
            buffers_pos = len(buffers) - 1
        weechat.hook_signal_send('input_text_changed',
                                 weechat.WEECHAT_HOOK_SIGNAL_POINTER, buf)
        return weechat.WEECHAT_RC_OK_EAT
    elif command == '/input return':
        # switch to selected buffer (if any)
        go_end(buf)
        if len(buffers) > 0:
            weechat.command(
                buf, '/buffer ' + str(buffers[buffers_pos]['full_name']))
        return weechat.WEECHAT_RC_OK_EAT
    return weechat.WEECHAT_RC_OK


def go_command_run_buffer(data, buf, command):
    """Function called when a command "/buffer xxx" is run."""
    return weechat.WEECHAT_RC_OK_EAT


def go_command_run_window(data, buf, command):
    """Function called when a command "/window xxx" is run."""
    return weechat.WEECHAT_RC_OK_EAT


def go_unload_script():
    """Function called when script is unloaded."""
    go_unhook_all()
    return weechat.WEECHAT_RC_OK


def go_main():
    """Entry point."""
    if not weechat.register(SCRIPT_NAME, SCRIPT_AUTHOR, SCRIPT_VERSION,
                            SCRIPT_LICENSE, SCRIPT_DESC,
                            'go_unload_script', ''):
        return
    weechat.hook_command(
        SCRIPT_COMMAND,
        'Quick jump to buffers', '[name]',
        'name: directly jump to buffer by name (without argument, list is '
        'displayed)\n\n'
        'You can bind command to a key, for example:\n'
        '  /key bind meta-g /go\n\n'
        'You can use completion key (commonly Tab and shift-Tab) to select '
        'next/previous buffer in list.',
        '%(buffers_names)',
        'go_cmd', '')

    # set default settings
    version = weechat.info_get('version_number', '') or 0
    for option, value in SETTINGS.items():
        if not weechat.config_is_set_plugin(option):
            weechat.config_set_plugin(option, value[0])
        if int(version) >= 0x00030500:
            weechat.config_set_desc_plugin(
                option, '%s (default: "%s")' % (value[1], value[0]))
    weechat.hook_info('go_running',
                      'Return "1" if go is running, otherwise "0"',
                      '',
                      'go_info_running', '')


if __name__ == "__main__" and IMPORT_OK:
    go_main()