Does anyone ever use --gui=browser?

Edward K. Ream

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Oct 24, 2025, 1:17:35 PMOct 24

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If so, why? :-)

I would like to retire this command-line option and the leoflexx plugin.

Edward

Viktor Ransmayr

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Oct 24, 2025, 3:31:12 PMOct 24

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Hello Edward,

Edward K. Ream schrieb am Freitag, 24. Oktober 2025 um 19:17:35 UTC+2:

If so, why? :-)

I would like to retire this command-line option and the leoflexx plugin.

* I have not activated / used the plugin ( knowingly ;-) ...
* I have used the command-line option (CLO) in the past - but - could not get it working for me & gave up ...

* I tried the CLO now again in the latest 'devel' branch - and - it still is not working for me with Firefox in a Fedora Linux VM - See attached logs ...

So no complaints from my side if the CLO & plugin is retired !

With kind regards,

Viktor

### Log-001 ###

[user@fedora-leo-study-vm ~]$
[user@fedora-leo-study-vm ~]$ cd PyVE/GitHub/Leo/
[user@fedora-leo-study-vm Leo]$
[user@fedora-leo-study-vm Leo]$ source bin/activate
(Leo) [user@fedora-leo-study-vm Leo]$
(Leo) [user@fedora-leo-study-vm Leo]$ cd leo-editor/
(Leo) [user@fedora-leo-study-vm leo-editor]$
(Leo) [user@fedora-leo-study-vm leo-editor]$ git branch
* devel
felix-export-to-html-outline-viewer
felix-improve-html-outline-viewer
(Leo) [user@fedora-leo-study-vm leo-editor]$
(Leo) [user@fedora-leo-study-vm leo-editor]$ git pull
remote: Enumerating objects: 28, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 28 (delta 6), reused 6 (delta 6), pack-reused 17 (from 1)
Unpacking objects: 100% (28/28), 36.19 KiB | 805.00 KiB/s, done.
From https://github.com/leo-editor/leo-editor
29edc0c8d..000a7380f devel -> origin/devel
160691ac5..5dc10b984 ekr-4449-colorizer -> origin/ekr-4449-colorizer
* [new branch] ekr-4462-date-abbrev -> origin/ekr-4462-date-abbrev
276ad5035..dd6bcac08 gh-pages -> origin/gh-pages
Updating 29edc0c8d..000a7380f
Fast-forward
.mypy.ini | 2 +-
leo/commands/abbrevCommands.py | 48 ++++++++++++-----------------
leo/core/leoFastRedraw.py | 140 ------------------------------------------------------------------------------------
leo/plugins/leoflexx.py | 47 ++--------------------------
4 files changed, 23 insertions(+), 214 deletions(-)
delete mode 100644 leo/core/leoFastRedraw.py
(Leo) [user@fedora-leo-study-vm leo-editor]$

###

(Leo) [user@fedora-leo-study-vm leo-editor]$
(Leo) [user@fedora-leo-study-vm leo-editor]$ python -m leo.core.runLeo --gui=browser &
[1] 2004
(Leo) [user@fedora-leo-study-vm leo-editor]$ setting leoID from os.getenv('USER'): 'user'
[I 21:02:35 flexx.app] Asset store collected 2 new modules.
Leo 6.8.8-devel, devel branch, build 000a7380f8
2025-10-24 11:58:03 -0500
Python 3.13.7, LeoGui: dummy version
linux

[I 21:02:36 flexx.app] Serving apps at http://localhost:49190/
[I 21:02:36 flexx.app] Asset store collected 27 new modules.
Uncaught exception GET /flexx/ws/LeoBrowserApp (127.0.0.1)
HTTPServerRequest(protocol='http', host='localhost:49190', method='GET', uri='/flexx/ws/LeoBrowserApp', version='HTTP/1.1', remote_ip='127.0.0.1')
Traceback (most recent call last):
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/tornado/websocket.py", line 631, in _run_callback
result = callback(*args, **kwargs)
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/flexx/app/_tornadoserver.py", line 543, in on_message
self._session = manager.connect_client(self, self.app_name,
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
session_id,
^^^^^^^^^^^
cookies=self.cookies)
^^^^^^^^^^^^^^^^^^^^^
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/flexx/app/_app.py", line 611, in connect_client
raise RuntimeError('Asked for session id %r, but could not find it' %
session_id)
RuntimeError: Asked for session id 't4x6odMOxv8UQ9hraikepCuw', but could not find it
gui.set_focus: unknown widget <StringTextWrapper: 130360110431968 body> finish_create,selectPosition,select,select,outerUpdate,set_focus

###

Leo Log Window
flexx version: 0.8.4
Leo 6.8.8-devel, devel branch, build 000a7380f8
2025-10-24 11:58:03 -0500
Python 3.13.7, LeoGui: dummy version
linux
setting leoID from os.getenv('USER'): 'user'
home: /home/user
leo-editor: /home/user/PyVE/GitHub/Leo/leo-editor
load: /home/user/PyVE/GitHub/Leo/leo-editor/leo/core
config: /home/user/PyVE/GitHub/Leo/leo-editor/leo/config
reading settings in /home/user/PyVE/GitHub/Leo/leo-editor/leo/config/leoSettings.leo
reading settings in /home/user/.leo/myLeoSettings.leo
reading settings in /home/user/PyVE/GitHub/Leo/leo-editor/leo/themes/tbp_dark_solarized.leo
reading settings in /home/user/Documents/SL2025.leo
read outline in 0.05 seconds
reading settings in /home/user/.leo/myLeoSettings.leo
read outline in 0.04 seconds

### Log-002 ###

(Leo) [user@fedora-leo-study-vm leo-editor]$
(Leo) [user@fedora-leo-study-vm leo-editor]$ python -m leo.core.runLeo --gui=browser &
[1] 2279
(Leo) [user@fedora-leo-study-vm leo-editor]$ setting leoID from os.getenv('USER'): 'user'
[I 21:09:24 flexx.app] Asset store collected 2 new modules.
Leo 6.8.8-devel, devel branch, build 000a7380f8
2025-10-24 11:58:03 -0500
Python 3.13.7, LeoGui: dummy version
linux

[I 21:09:24 flexx.app] Serving apps at http://localhost:49190/
[I 21:09:24 flexx.app] Asset store collected 27 new modules.
Uncaught exception GET /flexx/ws/LeoBrowserApp (127.0.0.1)
HTTPServerRequest(protocol='http', host='localhost:49190', method='GET', uri='/flexx/ws/LeoBrowserApp', version='HTTP/1.1', remote_ip='127.0.0.1')
Traceback (most recent call last):
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/tornado/websocket.py", line 631, in _run_callback
result = callback(*args, **kwargs)
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/flexx/app/_tornadoserver.py", line 543, in on_message
self._session = manager.connect_client(self, self.app_name,
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
session_id,
^^^^^^^^^^^
cookies=self.cookies)
^^^^^^^^^^^^^^^^^^^^^
File "/home/user/PyVE/GitHub/Leo/lib64/python3.13/site-packages/flexx/app/_app.py", line 611, in connect_client
raise RuntimeError('Asked for session id %r, but could not find it' %
session_id)
RuntimeError: Asked for session id 'fsnnPpf9e7lIPbETfkrEPnoX', but could not find it
gui.set_focus: unknown widget <StringTextWrapper: 138120357134048 body> finish_create,selectPosition,select,select,outerUpdate,set_focus
py.app.update_body_from_dict: MISMATCH: Log-000 ==> newHeadline

[1]+ Done python -m leo.core.runLeo --gui=browser
(Leo) [user@fedora-leo-study-vm leo-editor]$

Edward K. Ream

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Oct 24, 2025, 4:38:56 PMOct 24

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On Fri, Oct 24, 2025 at 2:31 PM Viktor Ransmayr <viktor....@gmail.com> wrote:

If so, why? :-)

I would like to retire this command-line option and the leoflexx plugin.

* I have not activated / used the plugin ( knowingly ;-) ...
* I have used the command-line option (CLO) in the past - but - could not get it working for me & gave up ...
* I tried the CLO now again in the latest 'devel' branch - and - it still is not working for me with Firefox in a Fedora Linux VM - See attached logs ...

Thanks, Viktor, for your report.

Edward

Viktor Ransmayr

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Oct 25, 2025, 7:54:58 AMOct 25

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Hello Edward,

Edward K. Ream schrieb am Freitag, 24. Oktober 2025 um 22:38:56 UTC+2:

On Fri, Oct 24, 2025 at 2:31 PM Viktor Ransmayr <viktor....@gmail.com> wrote:

... I would like to retire this command-line option and the leoflexx plugin.

* I have not activated / used the plugin ( knowingly ;-) ...
* I have used the command-line option (CLO) in the past - but - could not get it working for me & gave up ...
* I tried the CLO now again in the latest 'devel' branch - and - it still is not working for me with Firefox in a Fedora Linux VM - See attached logs ...

Thanks, Viktor, for your report.

Just for the record: The behavior I reported yesterday exists as far back as Leo 6.2. - At least for Fedora Linux ...

With kind regards,

Viktor

lewis

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Oct 27, 2025, 4:56:16 AMOct 27

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Hello Edward,

I no longer use the --gui=browser option.

Regards,

Lewis

Edward K. Ream

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Oct 27, 2025, 11:20:11 AMOct 27

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On Monday, October 27, 2025 at 3:56:16 AM UTC-5 lewis wrote:

Hello Edward,

I no longer use the --gui=browser option.

Thanks, Lewis, for checking in. I'll remove this option on Friday October 31 unless somebody objects.

Edward

Thomas Passin

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Oct 27, 2025, 11:41:17 AMOct 27

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Could we give it a deprecation warning for one release cycle?

Edward K. Ream

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Oct 27, 2025, 12:17:47 PMOct 27

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On Mon, Oct 27, 2025 at 10:41 AM Thomas Passin <tbp1...@gmail.com> wrote:

Could we give it a deprecation warning for one release cycle?

Hmm. We could do that, but I'd rather not. The clear alternative to flexx is LeoJS.

Edward

Edward K. Ream

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Oct 28, 2025, 11:04:14 AMOct 28

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There are two possible alternatives, but I won't do either unless the clear need arises:

1. Create a global switch (in leoGlobals.py) that would enable --gui=browser.

2. Modify plugins/leoflexx.py so that enabling the plugin would simulate --gui=browser.

Each makes Leo more complex. In contrast, PR #4467 simplifies Leo's code, dependencies, and documentation.

Edward

Thomas Passin

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Oct 28, 2025, 12:13:21 PMOct 28

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On Tuesday, October 28, 2025 at 11:04:14 AM UTC-4 Edward K. Ream wrote:

On Monday, October 27, 2025 at 11:17:47 AM UTC-5 Edward K. Ream wrote:
On Mon, Oct 27, 2025 at 10:41 AM Thomas Passin <tbp1...@gmail.com> wrote:
Could we give it a deprecation warning for one release cycle?

Hmm. We could do that, but I'd rather not. The clear alternative to flexx is LeoJS.

There are two possible alternatives, but I won't do either unless the clear need arises:

1. Create a global switch (in leoGlobals.py) that would enable --gui=browser.
2. Modify plugins/leoflexx.py so that enabling the plugin would simulate --gui=browser.

I don't like #2 at all because one couldn't even start Leo (at least without --gui=somethingelse) without the plugin kicking in. If the plugin were buggy or one just didn't like it, editing the enabled plugins setting could become tricky.

Edward K. Ream

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Oct 28, 2025, 3:52:43 PMOct 28

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On Tue, Oct 28, 2025 at 11:13 AM Thomas Passin <tbp1...@gmail.com> wrote:

.There are two possible alternatives, but I won't do either unless the clear need arises:

1. Create a global switch (in leoGlobals.py) that would enable --gui=browser.
2. Modify plugins/leoflexx.py so that enabling the plugin would simulate --gui=browser.

I don't like #2 at all because one couldn't even start Leo (at least without --gui=somethingelse) without the plugin kicking in. If the plugin were buggy or one just didn't like it, editing the enabled plugins setting could become tricky.