/
index.ts
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/
index.ts
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/* -----------------------------------------------------------------------------
| Copyright (c) Jupyter Development Team.
| Distributed under the terms of the Modified BSD License.
|----------------------------------------------------------------------------*/
/**
* @packageDocumentation
* @module apputils-extension
*/
import {
ILayoutRestorer,
IRouter,
JupyterFrontEnd,
JupyterFrontEndPlugin
} from '@jupyterlab/application';
import {
Dialog,
ICommandPalette,
ISanitizer,
ISessionContextDialogs,
ISplashScreen,
IWindowResolver,
MainAreaWidget,
Printing,
Sanitizer,
sessionContextDialogs,
WindowResolver
} from '@jupyterlab/apputils';
import { PageConfig, PathExt, URLExt } from '@jupyterlab/coreutils';
import { ISettingRegistry } from '@jupyterlab/settingregistry';
import { IStateDB, StateDB } from '@jupyterlab/statedb';
import { ITranslator } from '@jupyterlab/translation';
import { jupyterFaviconIcon } from '@jupyterlab/ui-components';
import { PromiseDelegate } from '@lumino/coreutils';
import { DisposableDelegate } from '@lumino/disposable';
import { Debouncer, Throttler } from '@lumino/polling';
import { announcements } from './announcements';
import { notificationPlugin } from './notificationplugin';
import { Palette } from './palette';
import { settingsPlugin } from './settingsplugin';
import { themesPaletteMenuPlugin, themesPlugin } from './themesplugins';
import { toolbarRegistry } from './toolbarregistryplugin';
import { workspacesPlugin } from './workspacesplugin';
/**
* The interval in milliseconds before recover options appear during splash.
*/
const SPLASH_RECOVER_TIMEOUT = 12000;
/**
* The command IDs used by the apputils plugin.
*/
namespace CommandIDs {
export const loadState = 'apputils:load-statedb';
export const print = 'apputils:print';
export const reset = 'apputils:reset';
export const resetOnLoad = 'apputils:reset-on-load';
export const runFirstEnabled = 'apputils:run-first-enabled';
export const runAllEnabled = 'apputils:run-all-enabled';
export const toggleHeader = 'apputils:toggle-header';
}
/**
* The default command palette extension.
*/
const palette: JupyterFrontEndPlugin<ICommandPalette> = {
id: '@jupyterlab/apputils-extension:palette',
autoStart: true,
requires: [ITranslator],
provides: ICommandPalette,
optional: [ISettingRegistry],
activate: (
app: JupyterFrontEnd,
translator: ITranslator,
settingRegistry: ISettingRegistry | null
) => {
return Palette.activate(app, translator, settingRegistry);
}
};
/**
* The default command palette's restoration extension.
*
* #### Notes
* The command palette's restoration logic is handled separately from the
* command palette provider extension because the layout restorer dependency
* causes the command palette to be unavailable to other extensions earlier
* in the application load cycle.
*/
const paletteRestorer: JupyterFrontEndPlugin<void> = {
id: '@jupyterlab/apputils-extension:palette-restorer',
autoStart: true,
requires: [ILayoutRestorer, ITranslator],
activate: (
app: JupyterFrontEnd,
restorer: ILayoutRestorer,
translator: ITranslator
) => {
Palette.restore(app, restorer, translator);
}
};
/**
* The default window name resolver provider.
*/
const resolver: JupyterFrontEndPlugin<IWindowResolver> = {
id: '@jupyterlab/apputils-extension:resolver',
autoStart: true,
provides: IWindowResolver,
requires: [JupyterFrontEnd.IPaths, IRouter],
activate: async (
app: JupyterFrontEnd,
paths: JupyterFrontEnd.IPaths,
router: IRouter
) => {
const { hash, search } = router.current;
const query = URLExt.queryStringToObject(search || '');
const solver = new WindowResolver();
const workspace = PageConfig.getOption('workspace');
const treePath = PageConfig.getOption('treePath');
const mode =
PageConfig.getOption('mode') === 'multiple-document' ? 'lab' : 'doc';
// This is used as a key in local storage to refer to workspaces, either the name
// of the workspace or the string PageConfig.defaultWorkspace. Both lab and doc modes share the same workspace.
const candidate = workspace ? workspace : PageConfig.defaultWorkspace;
const rest = treePath ? URLExt.join('tree', treePath) : '';
try {
await solver.resolve(candidate);
return solver;
} catch (error) {
// Window resolution has failed so the URL must change. Return a promise
// that never resolves to prevent the application from loading plugins
// that rely on `IWindowResolver`.
return new Promise<IWindowResolver>(() => {
const { base } = paths.urls;
const pool =
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
const random = pool[Math.floor(Math.random() * pool.length)];
let path = URLExt.join(base, mode, 'workspaces', `auto-${random}`);
path = rest ? URLExt.join(path, URLExt.encodeParts(rest)) : path;
// Reset the workspace on load.
query['reset'] = '';
const url = path + URLExt.objectToQueryString(query) + (hash || '');
router.navigate(url, { hard: true });
});
}
}
};
/**
* The default splash screen provider.
*/
const splash: JupyterFrontEndPlugin<ISplashScreen> = {
id: '@jupyterlab/apputils-extension:splash',
autoStart: true,
requires: [ITranslator],
provides: ISplashScreen,
activate: (app: JupyterFrontEnd, translator: ITranslator) => {
const trans = translator.load('jupyterlab');
const { commands, restored } = app;
// Create splash element and populate it.
const splash = document.createElement('div');
const galaxy = document.createElement('div');
const logo = document.createElement('div');
splash.id = 'jupyterlab-splash';
galaxy.id = 'galaxy';
logo.id = 'main-logo';
jupyterFaviconIcon.element({
container: logo,
stylesheet: 'splash'
});
galaxy.appendChild(logo);
['1', '2', '3'].forEach(id => {
const moon = document.createElement('div');
const planet = document.createElement('div');
moon.id = `moon${id}`;
moon.className = 'moon orbit';
planet.id = `planet${id}`;
planet.className = 'planet';
moon.appendChild(planet);
galaxy.appendChild(moon);
});
splash.appendChild(galaxy);
// Create debounced recovery dialog function.
let dialog: Dialog<unknown> | null;
const recovery = new Throttler(
async () => {
if (dialog) {
return;
}
dialog = new Dialog({
title: trans.__('Loading…'),
body: trans.__(`The loading screen is taking a long time.
Would you like to clear the workspace or keep waiting?`),
buttons: [
Dialog.cancelButton({ label: trans.__('Keep Waiting') }),
Dialog.warnButton({ label: trans.__('Clear Workspace') })
]
});
try {
const result = await dialog.launch();
dialog.dispose();
dialog = null;
if (result.button.accept && commands.hasCommand(CommandIDs.reset)) {
return commands.execute(CommandIDs.reset);
}
// Re-invoke the recovery timer in the next frame.
requestAnimationFrame(() => {
// Because recovery can be stopped, handle invocation rejection.
void recovery.invoke().catch(_ => undefined);
});
} catch (error) {
/* no-op */
}
},
{ limit: SPLASH_RECOVER_TIMEOUT, edge: 'trailing' }
);
// Return ISplashScreen.
let splashCount = 0;
return {
show: (light = true) => {
splash.classList.remove('splash-fade');
splash.classList.toggle('light', light);
splash.classList.toggle('dark', !light);
splashCount++;
document.body.appendChild(splash);
// Because recovery can be stopped, handle invocation rejection.
void recovery.invoke().catch(_ => undefined);
return new DisposableDelegate(async () => {
await restored;
if (--splashCount === 0) {
void recovery.stop();
if (dialog) {
dialog.dispose();
dialog = null;
}
splash.classList.add('splash-fade');
window.setTimeout(() => {
document.body.removeChild(splash);
}, 200);
}
});
}
};
}
};
const print: JupyterFrontEndPlugin<void> = {
id: '@jupyterlab/apputils-extension:print',
autoStart: true,
requires: [ITranslator],
activate: (app: JupyterFrontEnd, translator: ITranslator) => {
const trans = translator.load('jupyterlab');
app.commands.addCommand(CommandIDs.print, {
label: trans.__('Print…'),
isEnabled: () => {
const widget = app.shell.currentWidget;
return Printing.getPrintFunction(widget) !== null;
},
execute: async () => {
const widget = app.shell.currentWidget;
const printFunction = Printing.getPrintFunction(widget);
if (printFunction) {
await printFunction();
}
}
});
}
};
export const toggleHeader: JupyterFrontEndPlugin<void> = {
id: '@jupyterlab/apputils-extension:toggle-header',
autoStart: true,
requires: [ITranslator],
optional: [ICommandPalette],
activate: (
app: JupyterFrontEnd,
translator: ITranslator,
palette: ICommandPalette | null
) => {
const trans = translator.load('jupyterlab');
const category: string = trans.__('Main Area');
app.commands.addCommand(CommandIDs.toggleHeader, {
label: trans.__('Show Header Above Content'),
isEnabled: () =>
app.shell.currentWidget instanceof MainAreaWidget &&
app.shell.currentWidget.contentHeader.widgets.length > 0,
isToggled: () => {
const widget = app.shell.currentWidget;
return widget instanceof MainAreaWidget
? !widget.contentHeader.isHidden
: false;
},
execute: async () => {
const widget = app.shell.currentWidget;
if (widget instanceof MainAreaWidget) {
widget.contentHeader.setHidden(!widget.contentHeader.isHidden);
}
}
});
if (palette) {
palette.addItem({ command: CommandIDs.toggleHeader, category });
}
}
};
/**
* Update the browser title based on the workspace and the current
* active item.
*/
async function updateTabTitle(workspace: string, db: IStateDB, name: string) {
const data: any = await db.toJSON();
let current: string = data['layout-restorer:data']?.main?.current;
if (current === undefined) {
document.title = `${PageConfig.getOption('appName') || 'JupyterLab'}${
workspace.startsWith('auto-') ? ` (${workspace})` : ``
}`;
} else {
// File name from current path
let currentFile: string = PathExt.basename(
decodeURIComponent(window.location.href)
);
// Truncate to first 12 characters of current document name + ... if length > 15
currentFile =
currentFile.length > 15
? currentFile.slice(0, 12).concat(`…`)
: currentFile;
// Number of restorable items that are either notebooks or editors
const count: number = Object.keys(data).filter(
item => item.startsWith('notebook') || item.startsWith('editor')
).length;
if (workspace.startsWith('auto-')) {
document.title = `${currentFile} (${workspace}${
count > 1 ? ` : ${count}` : ``
}) - ${name}`;
} else {
document.title = `${currentFile}${
count > 1 ? ` (${count})` : ``
} - ${name}`;
}
}
}
/**
* The default state database for storing application state.
*
* #### Notes
* If this extension is loaded with a window resolver, it will automatically add
* state management commands, URL support for `clone` and `reset`, and workspace
* auto-saving. Otherwise, it will return a simple in-memory state database.
*/
const state: JupyterFrontEndPlugin<IStateDB> = {
id: '@jupyterlab/apputils-extension:state',
autoStart: true,
provides: IStateDB,
requires: [JupyterFrontEnd.IPaths, IRouter, ITranslator],
optional: [IWindowResolver],
activate: (
app: JupyterFrontEnd,
paths: JupyterFrontEnd.IPaths,
router: IRouter,
translator: ITranslator,
resolver: IWindowResolver | null
) => {
const trans = translator.load('jupyterlab');
if (resolver === null) {
return new StateDB();
}
let resolved = false;
const { commands, name, serviceManager } = app;
const { workspaces } = serviceManager;
const workspace = resolver.name;
const transform = new PromiseDelegate<StateDB.DataTransform>();
const db = new StateDB({ transform: transform.promise });
const save = new Debouncer(async () => {
const id = workspace;
const metadata = { id };
const data = await db.toJSON();
await workspaces.save(id, { data, metadata });
});
// Any time the local state database changes, save the workspace.
db.changed.connect(() => void save.invoke(), db);
db.changed.connect(() => updateTabTitle(workspace, db, name));
commands.addCommand(CommandIDs.loadState, {
execute: async (args: IRouter.ILocation) => {
// Since the command can be executed an arbitrary number of times, make
// sure it is safe to call multiple times.
if (resolved) {
return;
}
const { hash, path, search } = args;
const query = URLExt.queryStringToObject(search || '');
const clone =
typeof query['clone'] === 'string'
? query['clone'] === ''
? PageConfig.defaultWorkspace
: query['clone']
: null;
const source = clone || workspace || null;
if (source === null) {
console.error(`${CommandIDs.loadState} cannot load null workspace.`);
return;
}
try {
const saved = await workspaces.fetch(source);
// If this command is called after a reset, the state database
// will already be resolved.
if (!resolved) {
resolved = true;
transform.resolve({ type: 'overwrite', contents: saved.data });
}
} catch ({ message }) {
console.warn(`Fetching workspace "${workspace}" failed.`, message);
// If the workspace does not exist, cancel the data transformation
// and save a workspace with the current user state data.
if (!resolved) {
resolved = true;
transform.resolve({ type: 'cancel', contents: null });
}
}
if (source === clone) {
// Maintain the query string parameters but remove `clone`.
delete query['clone'];
const url = path + URLExt.objectToQueryString(query) + hash;
const cloned = save.invoke().then(() => router.stop);
// After the state has been cloned, navigate to the URL.
void cloned.then(() => {
router.navigate(url);
});
return cloned;
}
// After the state database has finished loading, save it.
await save.invoke();
}
});
commands.addCommand(CommandIDs.reset, {
label: trans.__('Reset Application State'),
execute: async ({ reload }: { reload: boolean }) => {
await db.clear();
await save.invoke();
if (reload) {
router.reload();
}
}
});
commands.addCommand(CommandIDs.resetOnLoad, {
execute: (args: IRouter.ILocation) => {
const { hash, path, search } = args;
const query = URLExt.queryStringToObject(search || '');
const reset = 'reset' in query;
const clone = 'clone' in query;
if (!reset) {
return;
}
// If the state database has already been resolved, resetting is
// impossible without reloading.
if (resolved) {
return router.reload();
}
// Empty the state database.
resolved = true;
transform.resolve({ type: 'clear', contents: null });
// Maintain the query string parameters but remove `reset`.
delete query['reset'];
const url = path + URLExt.objectToQueryString(query) + hash;
const cleared = db.clear().then(() => save.invoke());
// After the state has been reset, navigate to the URL.
if (clone) {
void cleared.then(() => {
router.navigate(url, { hard: true });
});
} else {
void cleared.then(() => {
router.navigate(url);
});
}
return cleared;
}
});
router.register({
command: CommandIDs.loadState,
pattern: /.?/,
rank: 30 // High priority: 30:100.
});
router.register({
command: CommandIDs.resetOnLoad,
pattern: /(\?reset|\&reset)($|&)/,
rank: 20 // High priority: 20:100.
});
return db;
}
};
/**
* The default session context dialogs extension.
*/
const sessionDialogs: JupyterFrontEndPlugin<ISessionContextDialogs> = {
id: '@jupyterlab/apputils-extension:sessionDialogs',
provides: ISessionContextDialogs,
autoStart: true,
activate: () => {
return sessionContextDialogs;
}
};
/**
* Utility commands
*/
const utilityCommands: JupyterFrontEndPlugin<void> = {
id: '@jupyterlab/apputils-extension:utilityCommands',
requires: [ITranslator],
autoStart: true,
activate: (app: JupyterFrontEnd, translator: ITranslator) => {
const trans = translator.load('jupyterlab');
const { commands } = app;
commands.addCommand(CommandIDs.runFirstEnabled, {
label: trans.__('Run First Enabled Command'),
execute: args => {
const commands: string[] = args.commands as string[];
const commandArgs: any = args.args;
const argList = Array.isArray(args);
for (let i = 0; i < commands.length; i++) {
const cmd = commands[i];
const arg = argList ? commandArgs[i] : commandArgs;
if (app.commands.isEnabled(cmd, arg)) {
return app.commands.execute(cmd, arg);
}
}
}
});
commands.addCommand(CommandIDs.runAllEnabled, {
label: trans.__('Run All Enabled Commands Passed as Args'),
execute: async args => {
const commands: string[] = args.commands as string[];
const commandArgs: any = args.args;
const argList = Array.isArray(args);
const errorIfNotEnabled: boolean = args.errorIfNotEnabled as boolean;
for (let i = 0; i < commands.length; i++) {
const cmd = commands[i];
const arg = argList ? commandArgs[i] : commandArgs;
if (app.commands.isEnabled(cmd, arg)) {
await app.commands.execute(cmd, arg);
} else {
if (errorIfNotEnabled) {
console.error(`${cmd} is not enabled.`);
}
}
}
}
});
}
};
/**
* The default HTML sanitizer.
*/
const sanitizer: JupyterFrontEndPlugin<ISanitizer> = {
id: '@jupyter/apputils-extension:sanitizer',
autoStart: true,
provides: ISanitizer,
requires: [ISettingRegistry],
activate: (app: JupyterFrontEnd, settings: ISettingRegistry): ISanitizer => {
const sanitizer = new Sanitizer();
const loadSetting = (setting: ISettingRegistry.ISettings): void => {
const allowedSchemes = setting.get('allowedSchemes').composite as Array<
string
>;
if (allowedSchemes) {
sanitizer.setAllowedSchemes(allowedSchemes);
}
};
// Wait for the application to be restored and
// for the settings for this plugin to be loaded
settings
.load('@jupyterlab/apputils-extension:sanitizer')
.then(setting => {
// Read the settings
loadSetting(setting);
// Listen for your plugin setting changes using Signal
setting.changed.connect(loadSetting);
})
.catch(reason => {
console.error(`Failed to load sanitizer settings:`, reason);
});
return sanitizer;
}
};
/**
* Export the plugins as default.
*/
const plugins: JupyterFrontEndPlugin<any>[] = [
announcements,
notificationPlugin,
palette,
paletteRestorer,
print,
resolver,
sanitizer,
settingsPlugin,
state,
splash,
sessionDialogs,
themesPlugin,
themesPaletteMenuPlugin,
toggleHeader,
toolbarRegistry,
utilityCommands,
workspacesPlugin
];
export default plugins;