core xblocks
Project description
This repository is the new home for XBlocks which are part of the base openedx-platform installation.
Project Overview
XBlocks are modular components that enable rich interactive learning experiences in Open edX courses. Historically, the XBlock code was tightly coupled with the edx-platform, making it challenging to manage and extend. By extracting XBlocks into this dedicated repository, we can reduce the complexity of the edx-platform, making it more maintainable and scalable.
XBlocks Being Moved Here
These are the XBlocks being moved here, and each of their statuses:
poll_question – Ready to Use
word_cloud – Ready to Use
annotatable – Ready to Use
lti – Ready to Use
pdf – Done
html – Ready to Use
discussion – Ready to Use
problem – Ready to Use
video – Ready to Use
The possible XBlock statuses are:
In Development: We’re building and testing this block.
Ready to Use: You can try this on your site using the Waffle flag.
Done: The built-in block has been removed. The setup.py entrypoint has been removed from edx-platform and added to xblock-contrib.
Additional XBlocks that belong here
Over time, more XBlocks may be moved here. An XBlock belongs here if and only if both of the following are true:
It needs to be part of the out-of-the-box Open edX experience, as agreed upon by the Product Working Group. Otherwise, perhaps the block belongs in xblocks-extra, or it belongs in a community repository outside of the openedx GitHub organization.
The maintainers of this repository have capacity to maintain the additional block. Otherwise, perhaps the block belongs in its own repository with a separate dedicated maintainer, such as ora2.
Installation and Development Guide
Study scripts in the package.json file to understand the available commands.
Install this repository into your runtime (for example openedx-platform) as an editable dependency. For Tutor, you can mount this repository for local development.
Run npm run build to generate production public assets for the XBlocks.
Run npm run build-dev to generate development public assets for the XBlocks.
Run npm run watch-build-dev to watch for relevant file changes and regenerate public assets. Recommended during development. Run it in a separate terminal; you will still need to refresh the browser to pick up rebuilt assets.
Run npm run test to run the repository tests.
Translating
Internationalization (i18n) is when a program is made aware of multiple languages. Localization (l10n) is adapting a program to local language and cultural habits.
For information on how to enable translations, visit the Open edX XBlock tutorial on Internationalization.
The included Makefile contains targets for extracting, compiling and validating translatable strings. Each XBlock in this repository has its own translation configuration under xblocks_contrib/<xblock>/conf/locale/ and its own Transifex resource mapping under xblocks_contrib/<xblock>/.tx/config. All Make targets iterate over every XBlock automatically.
The general steps to provide multilingual messages for a Python program (or an XBlock) are:
Mark translatable strings.
Run i18n tools to create raw message catalogs.
Create language specific translations for each message in the catalogs.
Use gettext to translate strings.
Prerequisites
Install the development requirements, which include edx-i18n-tools and GNU gettext tools (msgcat, msgfmt):
$ make requirements
On macOS, install gettext via Homebrew if not already present:
$ brew install gettext
1. Mark translatable strings
Mark translatable strings in python:
from django.utils.translation import gettext as _
# Translators: This comment will appear in the `.po` file.
message = _("This will be marked.")
See edx-developer-guide for more information.
You can also use gettext to mark strings in javascript:
// Translators: This comment will appear in the `.po` file.
var message = gettext("Custom message.");
See edx-developer-guide for more information.
2. Run i18n tools to create raw message catalogs
After marking strings as translatable we have to create the raw message catalogs. These catalogs are created in .po files. For more information see GNU PO file documentation. These catalogs can be created by running:
$ make extract_translations
This iterates over every XBlock and:
Runs i18n_tool extract --no-segment to extract Python, HTML and JS strings.
Merges djangojs.po into django.po (if JS strings exist) using msgcat.
Renames the result to text.po.
The output for each XBlock is a single file at:
xblocks_contrib/<xblock>/conf/locale/en/LC_MESSAGES/text.po
Additionally, all per-xblock text.po files are merged into a single combined file at:
xblocks_contrib/conf/locale/en/LC_MESSAGES/django.po
This combined file is used by the openedx-translations pipeline (OEP-58) to sync translations with Transifex. The per-xblock files are used for local development and testing.
3. Create language specific translations
3.1 Add translated strings
After creating the raw message catalogs, all translations should be filled out by the translator. One or more translators must edit the entries created in the message catalog, i.e. the .po file(s). The format of each entry is as follows:
# translator-comments A. extracted-comments #: reference... #, flag... #| msgid previous-untranslated-string msgid 'untranslated message' msgstr 'mensaje traducido (translated message)'
For more information see GNU PO file documentation.
3.2 Transifex integration (via openedx-translations)
This project follows OEP-58 for translation management. Translations are managed centrally through the openedx-translations repository:
A daily GitHub Actions workflow in openedx-translations clones this repo, runs make extract_translations, and commits the combined django.po source file.
The Transifex GitHub App syncs source strings to the openedx-translations Transifex project under the open-edx organization.
The Open edX translation community translates strings on Transifex.
Reviewed translations sync back to the openedx-translations repository.
Since these XBlocks were extracted from edx-platform, many strings already have existing translations in Transifex. The openedx-translations pipeline preserves these so translators do not need to re-translate them.
Direct Transifex CLI (alternative):
Each XBlock also has a .tx/config for direct Transifex CLI usage. This is useful for testing or when the openedx-translations pipeline is not available.
Install the Transifex CLI:
$ make install_transifex_client
Set your Transifex API token (request access from the Open edX Open Source Team):
$ export TX_TOKEN=<your-api-token>
Pull or push translations:
$ make pull_translations $ make push_translations
See Transifex CLI configuration for more details.
3.3 Compile translations
Once translations are in place, use the following Make target to compile the translation catalogs .po into .mo message files:
$ make compile_translations
This runs django-admin compilemessages inside each XBlock directory. See compilemessages documentation.
4. Use gettext to translate strings
Django will automatically use gettext and the compiled translations to translate strings.
Validating and testing translations
Validate the full translation pipeline (extract, generate dummy translations, compile, and check for source drift):
$ make validate_translations
This is the target used in CI (via tox -e translations). It runs the following targets in order:
Generate dummy (fake) translations in the Esperanto (eo) and fake-RTL (rtl) locales for visual testing:
$ make dummy_translations
You can trigger the display by setting your browser’s language to Esperanto and navigating to a page. Instead of plain English strings you should see accented English like:
The Future of Online Education --> The Futuré of Onliné Education
Compile translations (required after pull or dummy generation):
$ make compile_translations
Check if source translation files are up-to-date with the current source code:
$ make detect_changed_source_translations
Make targets reference
Target |
Description |
|---|---|
make extract_translations |
Extract translatable strings into text.po for each XBlock |
make compile_translations |
Compile .po files into .mo files for each XBlock |
make dummy_translations |
Generate dummy Esperanto/RTL .po files for testing |
make build_dummy_translations |
Generate and compile dummy translations |
make validate_translations |
Full validation: dummy build + source drift detection (CI target) |
make detect_changed_source_translations |
Check if source .po files are up-to-date |
make pull_translations |
Pull translations from Transifex |
make push_translations |
Extract and push source translations to Transifex |
make install_transifex_client |
Install the Transifex CLI |
Troubleshooting
If there are any errors compiling .po files, validate them:
$ make validate_translations
See django’s i18n troubleshooting documentation for more information.
Common issues:
i18n_tool: command not found – Run make requirements to install edx-i18n-tools.
msgcat: command not found – Install GNU gettext (brew install gettext on macOS).
Transifex push/pull errors – Ensure TX_TOKEN is set and you have access to the open-edx organization. Run make install_transifex_client if the tx CLI is missing.
Change Log
Unreleased
0.16.0 - 2026-04-21
Fixed
Fix video block editor issues while editing in the Content Library
0.16.0 - 2026-04-21
Fixed
Removed XModuleMixin usage and related duplicated logic from all xblocks
Renames xblocks_contrib/common → xblocks_contrib/legacy_utils
0.15.3 - 2026-04-02
Fixed
Removed XModuleMixin legacy attibs from Annotatable Block, Discussion XBlock, Html Block, Poll Block, Problem Block.
Match video download link font size with transcripts
0.15.2 - 2026-03-30
Added
Removed XModuleMixin legacy attibs from wordcloud, video block, lti block
0.15.1 - 2026-03-18
Added
Implemented JSON-based view to fetch a PDF-block’s settings.
0.15.0 - 2026-03-18
Added
Implemented the Discussion XBlock, extracted from edx-platform.
0.13.1 - 2026-03-09
Fixed
Fix TemplateDoesNotExist Error for capa templates.
0.13.0 - 2026-03-03
Added
Implemented the Video XBlock, extracted from edx-platform.
0.12.1 - 2026-03-03
Added
Adds Capa app entrypoints in setup.py.
0.12.0 - 2026-03-02
Added
Implemented the Problem XBlock, extracted from edx-platform.
0.11.1 - 2026-02-27
Fixed
Package data for PDF block (templates, static assets) was missing and is now included.
0.11.0 - 2026-01-26
Added
Implemented PDF Block, extracted from third party plugin.
0.6.0 – 2025-08-13
Added
Restore get_html in the extracted Annotatable XBlock to match existing edx-platform
0.5.0 – 2025-08-8
Added
Implemented the poll XBlock & HTML XBlock, extracted from edx-platform.
0.4.0 – 2025-05-7
Added
Implemented the LTI XBlock, extracted from edx-platform.
0.3.0 – 2025-04-8
Added
Added support for django 5.2.
Implemented the Annotatable XBlock, extracted from edx-platform.
0.2.0 – 2025-02-12
Added
Implemented the Word Cloud Block, extracted from edx-platform.
0.1.0 – 2024-07-04
Added
First release on PyPI.
Release history Release notifications | RSS feed
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