gristlabs_grist-core/app/client/ui/App.ts

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import {ClientScope} from 'app/client/components/ClientScope';
import * as Clipboard from 'app/client/components/Clipboard';
import {Comm} from 'app/client/components/Comm';
import * as commandList from 'app/client/components/commandList';
import * as commands from 'app/client/components/commands';
import {unsavedChanges} from 'app/client/components/UnsavedChanges';
import {get as getBrowserGlobals} from 'app/client/lib/browserGlobals';
import {isDesktop} from 'app/client/lib/browserInfo';
import {FocusLayer} from 'app/client/lib/FocusLayer';
import * as koUtil from 'app/client/lib/koUtil';
import {reportError, TopAppModel, TopAppModelImpl} from 'app/client/models/AppModel';
import {DocPageModel} from 'app/client/models/DocPageModel';
import {setUpErrorHandling} from 'app/client/models/errors';
import {createAppUI} from 'app/client/ui/AppUI';
import {addViewportTag} from 'app/client/ui/viewport';
import {attachCssRootVars} from 'app/client/ui2018/cssVars';
import {BaseAPI} from 'app/common/BaseAPI';
import {CommDocError} from 'app/common/CommTypes';
import {DisposableWithEvents} from 'app/common/DisposableWithEvents';
import {fetchFromHome} from 'app/common/urlUtils';
import {ISupportedFeatures} from 'app/common/UserConfig';
import {dom} from 'grainjs';
import * as ko from 'knockout';
import {makeT} from 'app/client/lib/localization';
const t = makeT('App');
// tslint:disable:no-console
const G = getBrowserGlobals('document', 'window');
/**
* Main Grist App UI component.
*/
export class App extends DisposableWithEvents {
// Used by #newui code to avoid a dependency on commands.js, and by tests to issue commands.
public allCommands = commands.allCommands;
public comm = this.autoDispose(Comm.create(this._checkError.bind(this)));
public clientScope: ClientScope;
public features: ko.Computed<ISupportedFeatures>;
public topAppModel: TopAppModel; // Exposed because used by test/nbrowser/gristUtils.
private _settings: ko.Observable<{features?: ISupportedFeatures}>;
// Track the version of the server we are communicating with, so that if it changes
// we can choose to refresh the client also.
private _serverVersion: string|null = null;
// Track the most recently created DocPageModel, for some error handling.
private _mostRecentDocPageModel?: DocPageModel;
constructor() {
super();
commands.init(); // Initialize the 'commands' module using the default command list.
// Create the notifications box, and use it for reporting errors we can catch.
setUpErrorHandling(reportError, koUtil);
this.clientScope = this.autoDispose(ClientScope.create());
// Settings, initialized by initSettings event triggered by a server message.
this._settings = ko.observable({});
this.features = ko.computed(() => this._settings().features || {});
if (isDesktop()) {
this.autoDispose(Clipboard.create(this));
} else {
// On mobile, we do not want to keep focus on a special textarea (which would cause unwanted
// scrolling and showing of mobile keyboard). But we still rely on 'clipboard_focus' and
// 'clipboard_blur' events to know when the "app" has a focus (rather than a particular
// input), by making document.body focusable and using a FocusLayer with it as the default.
document.body.setAttribute('tabindex', '-1');
FocusLayer.create(this, {
defaultFocusElem: document.body,
allowFocus: Clipboard.allowFocus,
onDefaultFocus: () => this.trigger('clipboard_focus'),
onDefaultBlur: () => this.trigger('clipboard_blur'),
});
}
this.topAppModel = this.autoDispose(TopAppModelImpl.create(null, G.window));
const isHelpPaneVisible = ko.observable(false);
G.document.querySelector('#grist-logo-wrapper').remove();
// Help pop-up pane
const helpDiv = document.body.appendChild(
dom('div.g-help',
dom.show(isHelpPaneVisible),
dom('table.g-help-table',
dom('thead',
dom('tr',
dom('th', t("Key")),
dom('th', t("Description"))
)
),
dom.forEach(commandList.groups, (group: any) => {
const cmds = group.commands.filter((cmd: any) => Boolean(cmd.desc && cmd.keys.length && !cmd.deprecated));
return cmds.length > 0 ?
dom('tbody',
dom('tr',
dom('td', {colspan: 2}, group.group)
),
dom.forEach(cmds, (cmd: any) =>
dom('tr',
dom('td', commands.allCommands[cmd.name].getKeysDom()),
dom('td', cmd.desc)
)
)
) : null;
})
)
)
);
this.onDispose(() => { dom.domDispose(helpDiv); helpDiv.remove(); });
this.autoDispose(commands.createGroup({
help() { G.window.open('help', '_blank').focus(); },
shortcuts() { isHelpPaneVisible(true); },
historyBack() { G.window.history.back(); },
historyForward() { G.window.history.forward(); },
}, this, true));
this.autoDispose(commands.createGroup({
cancel() { isHelpPaneVisible(false); },
cursorDown() { helpDiv.scrollBy(0, 30); }, // 30 is height of the row in the help screen
cursorUp() { helpDiv.scrollBy(0, -30); },
pageUp() { helpDiv.scrollBy(0, -helpDiv.clientHeight); },
pageDown() { helpDiv.scrollBy(0, helpDiv.clientHeight); },
moveToFirstField() { helpDiv.scrollTo(0, 0); }, // home
moveToLastField() { helpDiv.scrollTo(0, helpDiv.scrollHeight); }, // end
find() { return true; }, // restore browser search
help() { isHelpPaneVisible(false); },
}, this, isHelpPaneVisible));
this.listenTo(this.comm, 'clientConnect', (message) => {
console.log(`App clientConnect event: needReload ${message.needReload} version ${message.serverVersion}`);
this._settings(message.settings);
if (message.serverVersion === 'dead' || (this._serverVersion && this._serverVersion !== message.serverVersion)) {
console.log("Upgrading...");
// Server has upgraded. Upgrade client. TODO: be gentle and polite.
return this.reload();
}
this._serverVersion = message.serverVersion;
// Reload any open documents if needed (if clientId changed, or client can't get all missed
// messages). We'll simply reload the active component of the App regardless of what it is.
if (message.needReload) {
this.reloadPane();
}
});
this.listenTo(this.comm, 'connectState', (isConnected: boolean) => {
this.topAppModel.notifier.setConnectState(isConnected);
});
this.listenTo(this.comm, 'docShutdown', () => {
console.log("Received docShutdown");
// Reload on next tick, to let other objects process 'docShutdown' before they get disposed.
setTimeout(() => this.reloadPane(), 0);
});
this.listenTo(this.comm, 'docError', (msg: CommDocError) => {
this._checkError(new Error(msg.data.message));
});
// When the document is unloaded, dispose the app, allowing it to do any needed
// cleanup (e.g. Document on disposal triggers closeDoc message to the server). It needs to be
// in 'beforeunload' rather than 'unload', since websocket is closed by the time of 'unload'.
G.window.addEventListener('beforeunload', (ev: BeforeUnloadEvent) => {
if (unsavedChanges.haveUnsavedChanges()) {
// Following https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event
const msg = 'You have some unsaved changes';
ev.returnValue = msg;
ev.preventDefault();
return msg;
}
this.dispose();
});
this.comm.initialize(null);
// Add the cssRootVars class to enable the variables in cssVars.
attachCssRootVars(this.topAppModel.productFlavor);
addViewportTag();
this.autoDispose(createAppUI(this.topAppModel, this));
}
// We want to test errors from Selenium, but errors we can trigger using driver.executeScript()
// will be impossible for the application to report properly (they seem to be considered not of
// "same-origin"). So this silly callback is for tests to generate a fake error.
public testTriggerError(msg: string) { throw new Error(msg); }
public reloadPane() {
console.log("reloadPane");
this.topAppModel.reload();
}
// Intended to be used by tests to enable specific features.
public enableFeature(featureName: keyof ISupportedFeatures, onOff: boolean) {
const features = this.features();
features[featureName] = onOff;
this._settings(Object.assign(this._settings(), { features }));
}
public getServerVersion() {
return this._serverVersion;
}
public reload() {
G.window.location.reload(true);
return true;
}
public setDocPageModel(pageModel: DocPageModel) {
this._mostRecentDocPageModel = pageModel;
}
/**
* This method is not called anywhere, it is here just to introduce
* a special translation key. The purpose of this key is to let translators
* control whether a translation is ready to be offered to the user.
*
* If the key has not been translated for a language, and the language
* is not the default language, then the language should not be offered
* or used (unless some flag is set). TODO: implement this once key
* is available in weblate and good translations have been updated.
*/
public checkSpecialTranslationKey() {
return t('Translators: please translate this only when your language is ready to be offered to users');
}
// Get the user profile for testing purposes
public async testGetProfile(): Promise<any> {
const resp = await fetchFromHome('/api/profile/user', {credentials: 'include'});
return resp.json();
}
public testNumPendingApiRequests(): number {
return BaseAPI.numPendingRequests();
}
private _checkError(err: Error) {
const message = String(err);
// Take special action on any error that suggests a memory problem.
if (message.match(/MemoryError|unmarshallable object/)) {
if (err.message.length > 30) {
// TLDR
err.message = t("Memory Error");
}
this._mostRecentDocPageModel?.offerRecovery(err);
}
}
}