Make TemplateContext typed, move utils.filters to utils.templates

docs/dev-guide/api.md

@@ -14,6 +14,11 @@ NOTE: The main entry point to the API is through [Events](plugins.md#events) tha
     options:
       show_root_heading: true
 
+::: mkdocs.utils.templates.TemplateContext
+    options:
+      show_root_heading: true
+      show_if_no_docstring: true
+
 ::: mkdocs.livereload.LiveReloadServer
     options:
       show_root_heading: true

mkdocs/commands/build.py

@@ -4,7 +4,7 @@ import gzip
 import logging
 import os
 import time
-from typing import TYPE_CHECKING, Any, Sequence
+from typing import TYPE_CHECKING, Sequence
 from urllib.parse import urlsplit
 
 import jinja2
@@ -15,6 +15,7 @@ from mkdocs import utils
 from mkdocs.exceptions import Abort, BuildError
 from mkdocs.structure.files import File, Files, get_files
 from mkdocs.structure.nav import Navigation, get_navigation
+from mkdocs.utils import templates
 
 if TYPE_CHECKING:
     from mkdocs.config.defaults import MkDocsConfig
@@ -43,7 +44,7 @@ def get_context(
     config: MkDocsConfig,
     page: Page | None = None,
     base_url: str = '',
-) -> dict[str, Any]:
+) -> templates.TemplateContext:
     """
     Return the template context for a given page or template.
     """
@@ -57,17 +58,17 @@ def get_context(
     if isinstance(files, Files):
         files = files.documentation_pages()
 
-    return {
-        'nav': nav,
-        'pages': files,
-        'base_url': base_url,
-        'extra_css': extra_css,
-        'extra_javascript': extra_javascript,
-        'mkdocs_version': mkdocs.__version__,
-        'build_date_utc': utils.get_build_datetime(),
-        'config': config,
-        'page': page,
-    }
+    return templates.TemplateContext(
+        nav=nav,
+        pages=files,
+        base_url=base_url,
+        extra_css=extra_css,
+        extra_javascript=extra_javascript,
+        mkdocs_version=mkdocs.__version__,
+        build_date_utc=utils.get_build_datetime(),
+        config=config,
+        page=page,
+    )
 
 
 def _build_template(

mkdocs/contrib/search/__init__.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import logging
 import os
-from typing import TYPE_CHECKING, Any, List
+from typing import TYPE_CHECKING, List
 
 from mkdocs import utils
 from mkdocs.config import base
@@ -12,6 +12,7 @@ from mkdocs.plugins import BasePlugin
 
 if TYPE_CHECKING:
     from mkdocs.config.defaults import MkDocsConfig
+    from mkdocs.util.templates import TemplateContext
 
 log = logging.getLogger(__name__)
 base_path = os.path.dirname(os.path.abspath(__file__))
@@ -85,7 +86,7 @@ class SearchPlugin(BasePlugin[_PluginConfig]):
         "Create search index instance for later use."
         self.search_index = SearchIndex(**self.config)
 
-    def on_page_context(self, context: dict[str, Any], **kwargs) -> None:
+    def on_page_context(self, context: TemplateContext, **kwargs) -> None:
         "Add page to search index."
         self.search_index.add_entry_from_context(context['page'])
 

mkdocs/plugins.py

@@ -30,6 +30,7 @@ if TYPE_CHECKING:
     from mkdocs.structure.files import Files
     from mkdocs.structure.nav import Navigation
     from mkdocs.structure.pages import Page
+    from mkdocs.utils.templates import TemplateContext
 
 
 log = logging.getLogger('mkdocs.plugins')
@@ -267,8 +268,8 @@ class BasePlugin(Generic[SomeConfig]):
         return template
 
     def on_template_context(
-        self, context: dict[str, Any], *, template_name: str, config: MkDocsConfig
-    ) -> dict[str, Any] | None:
+        self, context: TemplateContext, *, template_name: str, config: MkDocsConfig
+    ) -> TemplateContext | None:
         """
         The `template_context` event is called immediately after the context is created
         for the subject template and can be used to alter the context for that specific
@@ -374,8 +375,8 @@ class BasePlugin(Generic[SomeConfig]):
         return html
 
     def on_page_context(
-        self, context: dict[str, Any], *, page: Page, config: MkDocsConfig, nav: Navigation
-    ) -> dict[str, Any] | None:
+        self, context: TemplateContext, *, page: Page, config: MkDocsConfig, nav: Navigation
+    ) -> TemplateContext | None:
         """
         The `page_context` event is called after the context for a page is created
         and can be used to alter the context for that specific page only.

mkdocs/theme.py

@@ -8,7 +8,7 @@ import jinja2
 
 from mkdocs import localization, utils
 from mkdocs.config.base import ValidationError
-from mkdocs.utils import filters
+from mkdocs.utils import templates
 
 log = logging.getLogger(__name__)
 
@@ -116,6 +116,6 @@ class Theme:
         loader = jinja2.FileSystemLoader(self.dirs)
         # No autoreload because editing a template in the middle of a build is not useful.
         env = jinja2.Environment(loader=loader, auto_reload=False)
-        env.filters['url'] = filters.url_filter
+        env.filters['url'] = templates.url_filter
         localization.install_translations(env, self._vars['locale'], self.dirs)
         return env

mkdocs/utils/filters.py

@@ -1,14 +1 @@
-from __future__ import annotations
-
-try:
-    from jinja2 import pass_context as contextfilter  # type: ignore
-except ImportError:
-    from jinja2 import contextfilter  # type: ignore
-
-from mkdocs.utils import normalize_url
-
-
-@contextfilter
-def url_filter(context, value: str) -> str:
-    """A Template filter to normalize URLs."""
-    return normalize_url(value, page=context['page'], base=context['base_url'])
+from .templates import url_filter  # noqa - legacy re-export

mkdocs/utils/templates.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import sys
+from typing import TYPE_CHECKING, Sequence
+
+if sys.version_info >= (3, 8):
+    from typing import TypedDict
+else:
+    from typing_extensions import TypedDict
+
+if TYPE_CHECKING:
+    import datetime
+
+try:
+    from jinja2 import pass_context as contextfilter  # type: ignore
+except ImportError:
+    from jinja2 import contextfilter  # type: ignore
+
+from mkdocs.utils import normalize_url
+
+if TYPE_CHECKING:
+    from mkdocs.config.defaults import MkDocsConfig
+    from mkdocs.structure.files import File
+    from mkdocs.structure.nav import Navigation
+    from mkdocs.structure.pages import Page
+
+
+class TemplateContext(TypedDict):
+    nav: Navigation
+    pages: Sequence[File]
+    base_url: str
+    extra_css: Sequence[str]
+    extra_javascript: Sequence[str]
+    mkdocs_version: str
+    build_date_utc: datetime.datetime
+    config: MkDocsConfig
+    page: Page | None
+
+
+@contextfilter
+def url_filter(context: TemplateContext, value: str) -> str:
+    """A Template filter to normalize URLs."""
+    return normalize_url(value, page=context['page'], base=context['base_url'])