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registry.ts
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registry.ts
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/*-----------------------------------------------------------------------------
| Copyright (c) Jupyter Development Team.
| Distributed under the terms of the Modified BSD License.
|----------------------------------------------------------------------------*/
import {
Contents, Session
} from '@jupyterlab/services';
import {
IRenderMime
} from '@jupyterlab/rendermime-interfaces';
import {
PathExt, URLExt
} from '@jupyterlab/coreutils';
import {
IClientSession, ISanitizer, defaultSanitizer
} from '@jupyterlab/apputils';
import {
ReadonlyJSONObject, Token
} from '@phosphor/coreutils';
import {
MimeModel
} from './mimemodel';
/* tslint:disable */
/**
* The rendermime token.
*/
export
const IRenderMimeRegistry = new Token<IRenderMimeRegistry>('@jupyterlab/rendermime:IRenderMimeRegistry');
export
interface IRenderMimeRegistry extends RenderMimeRegistry {};
/* tslint:enable */
/* tslint:disable */
/**
* The latex typesetter token.
*/
export
const ILatexTypesetter = new Token<IRenderMime.ILatexTypesetter>('@jupyterlab/rendermime:ILatexTypesetter');
export
interface ILatexTypesetter extends IRenderMime.ILatexTypesetter {}
/* tslint:enable */
/**
* An object which manages mime renderer factories.
*
* This object is used to render mime models using registered mime
* renderers, selecting the preferred mime renderer to render the
* model into a widget.
*
* #### Notes
* This class is not intended to be subclassed.
*/
export
class RenderMimeRegistry {
/**
* Construct a new rendermime.
*
* @param options - The options for initializing the instance.
*/
constructor(options: RenderMimeRegistry.IOptions = {}) {
// Parse the options.
this.resolver = options.resolver || null;
this.linkHandler = options.linkHandler || null;
this.latexTypesetter = options.latexTypesetter || null;
this.sanitizer = options.sanitizer || defaultSanitizer;
// Add the initial factories.
if (options.initialFactories) {
for (let factory of options.initialFactories) {
this.addFactory(factory);
}
}
}
/**
* The sanitizer used by the rendermime instance.
*/
readonly sanitizer: ISanitizer;
/**
* The object used to resolve relative urls for the rendermime instance.
*/
readonly resolver: IRenderMime.IResolver | null;
/**
* The object used to handle path opening links.
*/
readonly linkHandler: IRenderMime.ILinkHandler | null;
/**
* The LaTeX typesetter for the rendermime.
*/
readonly latexTypesetter: IRenderMime.ILatexTypesetter | null;
/**
* The ordered list of mimeTypes.
*/
get mimeTypes(): ReadonlyArray<string> {
return this._types || (this._types = Private.sortedTypes(this._ranks));
}
/**
* Find the preferred mime type for a mime bundle.
*
* @param bundle - The bundle of mime data.
*
* @param preferSafe - Whether to prefer a safe factory.
*
* @returns The preferred mime type from the available factories,
* or `undefined` if the mime type cannot be rendered.
*/
preferredMimeType(bundle: ReadonlyJSONObject, preferSafe: boolean): string | undefined {
// Try to find a safe factory first, if preferred.
if (preferSafe) {
for (let mt of this.mimeTypes) {
if (mt in bundle && this._factories[mt].safe) {
return mt;
}
}
}
// Otherwise, search for the best factory among all factories.
for (let mt of this.mimeTypes) {
if (mt in bundle) {
return mt;
}
}
// Otherwise, no matching mime type exists.
return undefined;
}
/**
* Create a renderer for a mime type.
*
* @param mimeType - The mime type of interest.
*
* @returns A new renderer for the given mime type.
*
* @throws An error if no factory exists for the mime type.
*/
createRenderer(mimeType: string): IRenderMime.IRenderer {
// Throw an error if no factory exists for the mime type.
if (!(mimeType in this._factories)) {
throw new Error(`No factory for mime type: '${mimeType}'`);
}
// Invoke the best factory for the given mime type.
return this._factories[mimeType].createRenderer({
mimeType,
resolver: this.resolver,
sanitizer: this.sanitizer,
linkHandler: this.linkHandler,
latexTypesetter: this.latexTypesetter
});
}
/**
* Create a new mime model. This is a convenience method.
*
* @options - The options used to create the model.
*
* @returns A new mime model.
*/
createModel(options: MimeModel.IOptions = {}): MimeModel {
return new MimeModel(options);
}
/**
* Create a clone of this rendermime instance.
*
* @param options - The options for configuring the clone.
*
* @returns A new independent clone of the rendermime.
*/
clone(options: RenderMimeRegistry.ICloneOptions = {}): RenderMimeRegistry {
// Create the clone.
let clone = new RenderMimeRegistry({
resolver: options.resolver || this.resolver || undefined,
sanitizer: options.sanitizer || this.sanitizer || undefined,
linkHandler: options.linkHandler || this.linkHandler || undefined,
latexTypesetter: options.latexTypesetter || this.latexTypesetter
});
// Clone the internal state.
clone._factories = { ...this._factories };
clone._ranks = { ...this._ranks };
clone._id = this._id;
// Return the cloned object.
return clone;
}
/**
* Get the renderer factory registered for a mime type.
*
* @param mimeType - The mime type of interest.
*
* @returns The factory for the mime type, or `undefined`.
*/
getFactory(mimeType: string): IRenderMime.IRendererFactory | undefined {
return this._factories[mimeType];
}
/**
* Add a renderer factory to the rendermime.
*
* @param factory - The renderer factory of interest.
*
* @param rank - The rank of the renderer. A lower rank indicates
* a higher priority for rendering. If not given, the rank will
* defer to the `defaultRank` of the factory. If no `defaultRank`
* is given, it will default to 100.
*
* #### Notes
* The renderer will replace an existing renderer for the given
* mimeType.
*/
addFactory(factory: IRenderMime.IRendererFactory, rank?: number): void {
if (rank === undefined) {
rank = factory.defaultRank;
if (rank === undefined) {
rank = 100;
}
}
for (let mt of factory.mimeTypes) {
this._factories[mt] = factory;
this._ranks[mt] = { rank, id: this._id++ };
}
this._types = null;
}
/**
* Remove a mime type.
*
* @param mimeType - The mime type of interest.
*/
removeMimeType(mimeType: string): void {
delete this._factories[mimeType];
delete this._ranks[mimeType];
this._types = null;
}
/**
* Get the rank for a given mime type.
*
* @param mimeType - The mime type of interest.
*
* @returns The rank of the mime type or undefined.
*/
getRank(mimeType: string): number | undefined {
let rank = this._ranks[mimeType];
return rank && rank.rank;
}
/**
* Set the rank of a given mime type.
*
* @param mimeType - The mime type of interest.
*
* @param rank - The new rank to assign.
*
* #### Notes
* This is a no-op if the mime type is not registered.
*/
setRank(mimeType: string, rank: number): void {
if (!this._ranks[mimeType]) {
return;
}
let id = this._id++;
this._ranks[mimeType] = { rank, id };
this._types = null;
}
private _id = 0;
private _ranks: Private.RankMap = {};
private _types: string[] | null = null;
private _factories: Private.FactoryMap = {};
}
/**
* The namespace for `RenderMimeRegistry` class statics.
*/
export
namespace RenderMimeRegistry {
/**
* The options used to initialize a rendermime instance.
*/
export
interface IOptions {
/**
* Intial factories to add to the rendermime instance.
*/
initialFactories?: ReadonlyArray<IRenderMime.IRendererFactory>;
/**
* The sanitizer used to sanitize untrusted html inputs.
*
* If not given, a default sanitizer will be used.
*/
sanitizer?: IRenderMime.ISanitizer;
/**
* The initial resolver object.
*
* The default is `null`.
*/
resolver?: IRenderMime.IResolver;
/**
* An optional path handler.
*/
linkHandler?: IRenderMime.ILinkHandler;
/**
* An optional LaTeX typesetter.
*/
latexTypesetter?: IRenderMime.ILatexTypesetter;
}
/**
* The options used to clone a rendermime instance.
*/
export
interface ICloneOptions {
/**
* The new sanitizer used to sanitize untrusted html inputs.
*/
sanitizer?: IRenderMime.ISanitizer;
/**
* The new resolver object.
*/
resolver?: IRenderMime.IResolver;
/**
* The new path handler.
*/
linkHandler?: IRenderMime.ILinkHandler;
/**
* The new LaTeX typesetter.
*/
latexTypesetter?: IRenderMime.ILatexTypesetter;
}
/**
* A default resolver that uses a session and a contents manager.
*/
export
class UrlResolver implements IRenderMime.IResolver {
/**
* Create a new url resolver for a console.
*/
constructor(options: IUrlResolverOptions) {
this._session = options.session;
this._contents = options.contents;
}
/**
* Resolve a relative url to a correct server path.
*/
resolveUrl(url: string): Promise<string> {
if (URLExt.isLocal(url)) {
let cwd = PathExt.dirname(this._session.path);
url = PathExt.resolve(cwd, url);
}
return Promise.resolve(url);
}
/**
* Get the download url of a given absolute server path.
*/
getDownloadUrl(path: string): Promise<string> {
if (URLExt.isLocal(path)) {
return this._contents.getDownloadUrl(path);
}
return Promise.resolve(path);
}
private _session: Session.ISession | IClientSession;
private _contents: Contents.IManager;
}
/**
* The options used to create a UrlResolver.
*/
export
interface IUrlResolverOptions {
/**
* The session used by the resolver.
*/
session: Session.ISession | IClientSession;
/**
* The contents manager used by the resolver.
*/
contents: Contents.IManager;
}
}
/**
* The namespace for the module implementation details.
*/
namespace Private {
/**
* A type alias for a mime rank and tie-breaking id.
*/
export
type RankPair = { readonly id: number, readonly rank: number };
/**
* A type alias for a mapping of mime type -> rank pair.
*/
export
type RankMap = { [key: string]: RankPair };
/**
* A type alias for a mapping of mime type -> ordered factories.
*/
export
type FactoryMap = { [key: string]: IRenderMime.IRendererFactory };
/**
* Get the mime types in the map, ordered by rank.
*/
export
function sortedTypes(map: RankMap): string[] {
return Object.keys(map).sort((a, b) => {
let p1 = map[a];
let p2 = map[b];
if (p1.rank !== p2.rank) {
return p1.rank - p2.rank;
}
return p1.id - p2.id;
});
}
}