インタフェースのリファレンス

Tracは、ComponentArchitectureに基づき多くのインタフェースをプラグイン開発者に提供しています。
が、資料はほとんどないので、ここにまとめてみました。

インタフェース一覧

0.10で若干インタフェースが増えてるようです。

パッケージ	インタフェース	Trac 0.9	Trac 0.10
trac.db.api	IDatabaseConnector	×	○
trac.mimeview.api	IHTMLPreviewRenderer	○	○
trac.mimeview.api	IHTMLPreviewAnnotator	○	○
trac.tests.core	ITest	×	○
trac.ticket.api	ITicketChangeListener	×	○
trac.ticket.api	ITicketManipulator	×	○
trac.versioncontrol.api	IRepositoryConnector	×	○
trac.web.api	IAuthenticator	○	○
trac.web.api	IRequestHandler	○	○
trac.web.chrome	INavigationContributor	○	○
trac.web.chrome	ITemplateProvider	○	○
trac.wiki.api	IWikiChangeListener	○	○
trac.wiki.api	IWikiPageManipulator	×	○
trac.wiki.api	IWikiMacroProvider	○	○
trac.wiki.api	IWikiSyntaxProvider	○	○
trac.env	IEnvironmentSetupParticipant	○	○
trac.perm	IPermissionRequestor	○	○
trac.perm	IPermissionStore	○	○
trac.perm	IPermissionGroupProvider	○	○
trac.Search	ISearchSource	○	○
trac.Timeline	ITimelineEventProvider	○	○

リファレンス

IDatabaseConnector

Trac 0.10以降。DB接続先を変えるためのインタフェースみたいです。

class IDatabaseConnector(Interface):
    """Extension point interface for components that support the connection to
    relational databases."""

    def get_supported_schemes():
        """Return the connection URL schemes supported by the connector, and
        their relative priorities as an iterable of `(scheme, priority)` tuples.
        """

    def get_connection(**kwargs):
        """Create a new connection to the database."""
        
    def init_db(**kwargs):
        """Initialize the database."""

    def to_sql(table):
        """Return the DDL statements necessary to create the specified table,
        including indices."""

IHTMLPreviewRenderer

リポジトリブラウザで、MimeTypeに紐づくHTMLを出力するためのインタフェース。 特定のMimeTypeに対して、リポジトリブラウザでデータを見せたいときにこれを使います。

class IHTMLPreviewRenderer(Interface):
    """Extension point interface for components that add HTML renderers of
    specific content types to the `Mimeview` component.
    """

    # implementing classes should set this property to True if they
    # support text content where Trac should expand tabs into spaces
    expand_tabs = False

    def get_quality_ratio(mimetype):
        """Return the level of support this renderer provides for the `content`
        of the specified MIME type. The return value must be a number between
        0 and 9, where 0 means no support and 9 means "perfect" support.
        """

    def render(req, mimetype, content, filename=None, url=None):
        """Render an XHTML preview of the raw `content`.

        The `content` might be:
         * a `str` object
         * an `unicode` string
         * any object with a `read` method, returning one of the above

        It is assumed that the content will correspond to the given `mimetype`.

        Besides the `content` value, the same content may eventually
        be available through the `filename` or `url` parameters.
        This is useful for renderers that embed objects, using <object> or
        <img> instead of including the content inline.
        
        Can return the generated XHTML text as a single string or as an
        iterable that yields strings. In the latter case, the list will
        be considered to correspond to lines of text in the original content.
        """

サンプル： source:/trunk/xdocviewplugin/xdocview/xdocview.py@36

IHTMLPreviewAnnotator

IHTMLPreviewRendererと似てますが、これはXHTML版なのかな？使ってるのは見たことありません。

class IHTMLPreviewAnnotator(Interface):
    """Extension point interface for components that can annotate an XHTML
    representation of file contents with additional information."""

    def get_annotation_type():
        """Return a (type, label, description) tuple that defines the type of
        annotation and provides human readable names. The `type` element should
        be unique to the annotator. The `label` element is used as column
        heading for the table, while `description` is used as a display name to
        let the user toggle the appearance of the annotation type.
        """

    def annotate_line(number, content):
        """Return the XHTML markup for the table cell that contains the
        annotation data."""