Add Simplified Chinese interface localization

CHANGELOG.md

@@ -4,6 +4,9 @@
 
 ### Added
 
+- Added interface language support for English and Simplified Chinese, with a
+  system-language option in Settings. Scientific database content, activity
+  names, methods, units, and exported source data remain unchanged.
 - ([#512](https://github.com/LCA-ActivityBrowser/activity-browser/pull/512))
     Added a number of small improvements to the AB, users can now copy existing
     LCA setups. Additionally, multiple activities can now be duplicated, deleted

MANIFEST.in

@@ -8,3 +8,5 @@ recursive-include activity_browser *.js
 recursive-include activity_browser *.css
 recursive-include activity_browser *.txt
 recursive-include activity_browser *.zip
+recursive-include activity_browser *.json
+recursive-include activity_browser *.qm

activity_browser/__init__.py

@@ -8,7 +8,13 @@
 from .application import application
 from .signals import signals
 from .settings import ab_settings, project_settings
+from .i18n import translation_manager
 from .info import __version__ as version
+
+# Install the selected interface language before importing or constructing UI
+# classes.  The setting itself changes only on restart in the first release.
+translation_manager.install(application, ab_settings.language)
+
 from .layouts.main import MainWindow
 from .plugin import Plugin
 from .controllers import *

activity_browser/actions/activity/activity_delete.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.mod.bw2data.parameters import (ActivityParameter, Group,
                                                      GroupDependency,
@@ -27,20 +28,23 @@ def run(activity_keys: List[tuple]):
         # retrieve activity objects from the controller using the provided keys
         activities = [bd.get_activity(key) for key in activity_keys]
 
-        warning_text = f"Are you certain you want to delete {len(activities)} activity/activities?"
+        warning_text = _(
+            "Are you certain you want to delete {count} activities?",
+            count=len(activities),
+        )
 
         # check for downstream processes
         if any(len(act.upstream()) > 0 for act in activities):
             # warning text
-            warning_text += (
-                "\n\nOne or more activities have downstream processes. Deleting these activities will remove the "
-                "exchange from the downstream processes as well."
+            warning_text += _(
+                "\n\nOne or more activities have downstream processes. Deleting these "
+                "activities will also remove their exchanges from downstream processes."
             )
 
         # alert the user
         choice = QtWidgets.QMessageBox.warning(
             application.main_window,
-            "Deleting activity/activities",
+            _("Delete activities"),
             warning_text,
             QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
             QtWidgets.QMessageBox.No,
@@ -49,9 +53,6 @@ def run(activity_keys: List[tuple]):
         # return if the user cancels
         if choice == QtWidgets.QMessageBox.No:
             return
-
-
-
         # use the activity controller to delete multiple activities
         for act in activities:
             db, code = act.key

activity_browser/actions/activity/activity_duplicate_to_db.py

@@ -5,6 +5,7 @@
 from activity_browser import application, project_settings
 from activity_browser.actions.base import ABAction, exception_dialogs
 from activity_browser.bwutils import commontasks
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.ui.icons import qicons
 
@@ -57,16 +58,19 @@ def request_db(activities):
         if not target_dbs:
             QtWidgets.QMessageBox.warning(
                 application.main_window,
-                "No target database",
-                "No valid target databases available. Create a new database or set one to writable (not read-only).",
+                _("No target database"),
+                _(
+                    "No valid target databases are available. Create a new database "
+                    "or make an existing database writable."
+                ),
             )
             return
 
         # construct a dialog where the user can choose a database to duplicate to
         target_db, ok = QtWidgets.QInputDialog.getItem(
             application.main_window,
-            "Copy activity to database",
-            "Target database:",
+            _("Copy activity to database"),
+            _("Target database:"),
             target_dbs,
             0,
             False,
@@ -82,7 +86,7 @@ def request_db(activities):
     def confirm_db(to_db: str):
         user_choice = QtWidgets.QMessageBox.question(
             application.main_window,
-            "Duplicate to new database",
-            f"Copy to {to_db} and open as new tab?",
+            _("Duplicate to new database"),
+            _("Copy to {database} and open it in a new tab?", database=to_db),
         )
         return user_choice == user_choice.Yes

activity_browser/actions/activity/activity_new.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod.bw2data import Database
 from activity_browser.ui.icons import qicons
 
@@ -25,8 +26,8 @@ def run(database_name: str):
         # ask the user to provide a name for the new activity
         name, ok = QtWidgets.QInputDialog.getText(
             application.main_window,
-            "Create new technosphere activity",
-            "Please specify an activity name:" + " " * 10,
+            _("Create new technosphere activity"),
+            _("Please specify an activity name:") + " " * 10,
             QtWidgets.QLineEdit.Normal,
         )
 

activity_browser/actions/base.py

@@ -1,6 +1,7 @@
 from PySide2 import QtCore, QtGui, QtWidgets
 
 from activity_browser import application
+from activity_browser.i18n import _
 
 
 class ABAction:
@@ -21,8 +22,9 @@ def triggered(cls, *args, **kwargs):
 
     @classmethod
     def get_QAction(cls, *args, **kwargs) -> QtWidgets.QAction:
-        action = QtWidgets.QAction(cls.icon, cls.text, None)
-        action.setToolTip(cls.tooltip)
+        action = QtWidgets.QAction(cls.icon, _(cls.text) if cls.text else "", None)
+        tooltip = cls.tooltip or getattr(cls, "tool_tip", None)
+        action.setToolTip(_(tooltip) if tooltip else "")
 
         action.triggered.connect(lambda: cls.triggered(*args, **kwargs))
 
@@ -33,7 +35,7 @@ def get_QButton(cls, *args, **kwargs):
         """Convenience function to return a button that has this ABAction as default action."""
         button = QtWidgets.QPushButton(
             cls.icon,
-            cls.text
+            _(cls.text) if cls.text else "",
         )
         button.clicked.connect(lambda x: cls.triggered(*args, **kwargs))
         return button
@@ -46,8 +48,14 @@ def wrapper(*args, **kwargs):
         except Exception as e:
             QtWidgets.QMessageBox.critical(
                 application.main_window,
-                f"An error occurred: {type(e).__name__}",
-                f"An error occurred, check the logs for more information \n\n {str(e)}",
+                _(
+                    "An error occurred: {error_type}",
+                    error_type=type(e).__name__,
+                ),
+                _(
+                    "An error occurred, check the logs for more information\n\n{error}",
+                    error=str(e),
+                ),
                 QtWidgets.QMessageBox.Ok,
             )
             raise e

activity_browser/actions/biosphere_update.py

@@ -3,6 +3,7 @@
 from activity_browser import application
 from activity_browser.actions.base import ABAction, exception_dialogs
 from activity_browser.info import __ei_versions__
+from activity_browser.i18n import _
 from activity_browser.ui.widgets import (BiosphereUpdater,
                                          EcoinventVersionDialog)
 from activity_browser.utils import sort_semantic_versions
@@ -25,10 +26,12 @@ def run():
         # warn user of consequences of updating
         warn_dialog = QtWidgets.QMessageBox.question(
             application.main_window,
-            "Update biosphere3?",
-            "Newer versions of the biosphere database may not\n"
-            "always be compatible with older ecoinvent versions.\n"
-            "\nUpdating the biosphere3 database cannot be undone!\n",
+            _("Update biosphere3?"),
+            _(
+                "Newer versions of the biosphere database may not always be "
+                "compatible with older ecoinvent versions.\n\nUpdating the "
+                "biosphere3 database cannot be undone!"
+            ),
             QtWidgets.QMessageBox.Ok | QtWidgets.QMessageBox.Abort,
             QtWidgets.QMessageBox.Abort,
         )

activity_browser/actions/calculation_setup/cs_delete.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application, signals
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.ui.icons import qicons
 
@@ -25,8 +26,8 @@ def run(cs_name: str):
         # ask the user whether they are sure to delete the calculation setup
         warning = QtWidgets.QMessageBox.warning(
             application.main_window,
-            f"Deleting Calculation Setup: {cs_name}",
-            "Are you sure you want to delete this calculation setup?",
+            _("Delete calculation setup: {name}", name=cs_name),
+            _("Are you sure you want to delete this calculation setup?"),
             QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
             QtWidgets.QMessageBox.No,
         )
@@ -41,7 +42,7 @@ def run(cs_name: str):
 
         QtWidgets.QMessageBox.information(
             application.main_window,
-            f"Deleting Calculation Setup: {cs_name}",
-            "Calculation setup was succesfully deleted.",
+            _("Delete calculation setup: {name}", name=cs_name),
+            _("The calculation setup was successfully deleted."),
             QtWidgets.QMessageBox.Ok,
         )

activity_browser/actions/calculation_setup/cs_duplicate.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application, signals
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.ui.icons import qicons
 
@@ -26,8 +27,8 @@ def run(cs_name: str):
         # prompt the user to give a name for the new calculation setup
         new_name, ok = QtWidgets.QInputDialog.getText(
             application.main_window,
-            f"Duplicate '{cs_name}'",
-            "Name of the duplicated calculation setup:" + " " * 10,
+            _("Duplicate '{name}'", name=cs_name),
+            _("Name of the duplicated calculation setup:") + " " * 10,
         )
 
         # return if the user cancels or gives no name
@@ -38,8 +39,8 @@ def run(cs_name: str):
         if new_name in bd.calculation_setups:
             QtWidgets.QMessageBox.warning(
                 application.main_window,
-                "Not possible",
-                "A calculation setup with this name already exists.",
+                _("Not possible"),
+                _("A calculation setup with this name already exists."),
             )
             return
 

activity_browser/actions/calculation_setup/cs_new.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application, signals
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.ui.icons import qicons
 
@@ -26,8 +27,8 @@ def run():
         # prompt the user to give a name for the new calculation setup
         name, ok = QtWidgets.QInputDialog.getText(
             application.main_window,
-            "Create new calculation setup",
-            "Name of new calculation setup:" + " " * 10,
+            _("Create new calculation setup"),
+            _("Name of new calculation setup:") + " " * 10,
         )
 
         # return if the user cancels or gives no name
@@ -38,8 +39,8 @@ def run():
         if name in bd.calculation_setups:
             QtWidgets.QMessageBox.warning(
                 application.main_window,
-                "Not possible",
-                "A calculation setup with this name already exists.",
+                _("Not possible"),
+                _("A calculation setup with this name already exists."),
             )
             return
 

activity_browser/actions/calculation_setup/cs_rename.py

@@ -4,6 +4,7 @@
 
 from activity_browser import application, signals
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.ui.icons import qicons
 
@@ -26,8 +27,8 @@ def run(cs_name: str):
         # prompt the user to give a name for the new calculation setup
         new_name, ok = QtWidgets.QInputDialog.getText(
             application.main_window,
-            f"Rename '{cs_name}'",
-            "New name of this calculation setup:" + " " * 10,
+            _("Rename '{name}'", name=cs_name),
+            _("New name of this calculation setup:") + " " * 10,
         )
 
         # return if the user cancels or gives no name
@@ -38,8 +39,8 @@ def run(cs_name: str):
         if new_name in bd.calculation_setups:
             QtWidgets.QMessageBox.warning(
                 application.main_window,
-                "Not possible",
-                "A calculation setup with this name already exists.",
+                _("Not possible"),
+                _("A calculation setup with this name already exists."),
             )
             return
 

activity_browser/actions/database/database_delete.py

@@ -3,6 +3,7 @@
 
 from activity_browser import application, project_settings
 from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.i18n import _
 from activity_browser.mod import bw2data as bd
 from activity_browser.mod.bw2data.backends.proxies import (ExchangeDataset,
                                                            Exchanges)
@@ -39,16 +40,38 @@ def run(db_name: str):
         n_upstream_excs = len(excs)
 
         # construct warning text
-        text = f"Are you sure you want to delete database '{db_name}'?"
-        if n_records:
-            text += f" It contains {n_records} activities"
-        if n_upstream_excs:
-            text += f" and {n_upstream_excs} exchanges to other databases"
+        if n_records and n_upstream_excs:
+            text = _(
+                "Are you sure you want to delete database '{database}'? It contains "
+                "{activities} activities and {exchanges} exchanges to other databases.",
+                database=db_name,
+                activities=n_records,
+                exchanges=n_upstream_excs,
+            )
+        elif n_records:
+            text = _(
+                "Are you sure you want to delete database '{database}'? It contains "
+                "{activities} activities.",
+                database=db_name,
+                activities=n_records,
+            )
+        elif n_upstream_excs:
+            text = _(
+                "Are you sure you want to delete database '{database}'? It has "
+                "{exchanges} exchanges to other databases.",
+                database=db_name,
+                exchanges=n_upstream_excs,
+            )
+        else:
+            text = _(
+                "Are you sure you want to delete database '{database}'?",
+                database=db_name,
+            )
 
         # ask the user for confirmation
         QtWidgets.QApplication.restoreOverrideCursor()
         response = QtWidgets.QMessageBox.question(
-            application.main_window, "Delete database?", text
+                application.main_window, _("Delete database?"), text
         )
 
         # return if the user cancels