pgadmin4/docs/en_US/translations.rst
2016-05-20 16:39:35 -04:00

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Translations
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pgAdmin supports multiple languages using the `Flask-Babel
<https://pythonhosted.org/Flask-Babel/>`_ Python module. A list of supported
languages is included in the **web/config.py** configuration file and must be
updated whenever langauges are added or removed.
Translation Marking
===================
Strings can be marked for translation in either Python code (using **gettext()**)
or Jinja templates (using **_()**). Here are some examples that show how this
is achieved.
Python::
errormsg = gettext('No server group name was specified')
Jinja:
.. code-block:: html
<input type="submit" value="{{ _('Change Password') }}">
.. code-block:: html
<title>{{ _('%(appname)s Password Change', appname=config.APP_NAME) }}</title>
.. code-block:: javascript
var alert = alertify.prompt(
'{{ _('Add a server group') }}',
'{{ _('Enter a name for the new server group') }}',
''
...
)
Updating and Merging
====================
Whenever new strings are added to the application, the template catalogues
(**web/pgadmin/messages.pot**) must be updated and the existing catalogues
merged with the updated template and compiled. This can be achieved using the
following command from the **web** directory, in the Python virtual environment
used for pgAdmin:
.. code-block:: bash
(pgadmin4)piranha:web dpage$ pybabel extract -F babel.cfg -o pgadmin/messages.pot pgadmin
For example:
.. code-block:: bash
(pgadmin4)piranha:web dpage$ pybabel extract -F babel.cfg -o pgadmin/messages.pot pgadmin
extracting messages from pgadmin/__init__.py
extracting messages from pgadmin/about/__init__.py
extracting messages from pgadmin/about/hooks.py
extracting messages from pgadmin/about/views.py
extracting messages from pgadmin/about/templates/about/index.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/browser/__init__.py
extracting messages from pgadmin/browser/hooks.py
extracting messages from pgadmin/browser/views.py
extracting messages from pgadmin/browser/nodes/CollectionNode.py
extracting messages from pgadmin/browser/nodes/ObjectNode.py
extracting messages from pgadmin/browser/nodes/__init__.py
extracting messages from pgadmin/browser/nodes/server_groups/__init__.py
extracting messages from pgadmin/browser/nodes/server_groups/hooks.py
extracting messages from pgadmin/browser/nodes/server_groups/views.py
extracting messages from pgadmin/browser/templates/browser/body.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/browser/templates/browser/index.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/browser/templates/browser/messages.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/help/__init__.py
extracting messages from pgadmin/help/hooks.py
extracting messages from pgadmin/help/views.py
extracting messages from pgadmin/redirects/__init__.py
extracting messages from pgadmin/redirects/views.py
extracting messages from pgadmin/settings/__init__.py
extracting messages from pgadmin/settings/hooks.py
extracting messages from pgadmin/settings/settings_model.py
extracting messages from pgadmin/settings/views.py
extracting messages from pgadmin/templates/base.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/change_password.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/fields.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/forgot_password.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/login_user.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/messages.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/panel.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/reset_password.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/templates/security/watermark.html (extensions="jinja2.ext.autoescape,jinja2.ext.with_")
extracting messages from pgadmin/test/__init__.py
extracting messages from pgadmin/test/hooks.py
extracting messages from pgadmin/test/views.py
extracting messages from pgadmin/utils/__init__.py
extracting messages from pgadmin/utils/views.py
writing PO template file to pgadmin/messages.pot
Once the template has been updated, it needs to be merged into the existing
message catalogues, for example:
.. code-block:: bash
(pgadmin4)piranha:web dpage$ pybabel update -i pgadmin/messages.pot -d pgadmin/translations
updating catalog 'pgadmin/translations/fr/LC_MESSAGES/messages.po' based on 'pgadmin/messages.pot'
Finally, the message catalogues can be compiled for use:
.. code-block:: bash
(pgadmin4)piranha:web dpage$ pybabel compile -d pgadmin/translations
compiling catalog 'pgadmin/translations/fr/LC_MESSAGES/messages.po' to 'pgadmin/translations/fr/LC_MESSAGES/messages.mo'
Adding a new Language
=====================
Adding a new language is simple. First, add the language name and identifier to
**web/config.py**::
# Languages we support in the UI
LANGUAGES = {
'en': 'English',
'fr': 'Français'
}
Then, create the new message catalogue from the **web** directory in the source
tree, in the Python virtual environment used for pgAdmin:
.. code-block:: bash
(pgadmin4)piranha:web dpage$ pybabel init -i pgadmin/messages.pot -d pgadmin/translations -l fr
This will initialise a new catalogue for a French translation.