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(core) move client code to core
Summary: This moves all client code to core, and makes minimal fix-ups to get grist and grist-core to compile correctly. The client works in core, but I'm leaving clean-up around the build and bundles to follow-up. Test Plan: existing tests pass; server-dev bundle looks sane Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2627
This commit is contained in:
Paul Fitzpatrick
338
app/client/models/SearchModel.ts
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338
app/client/models/SearchModel.ts
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// tslint:disable:no-console
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// TODO: Add documentation and clean up log statements.
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import {GristDoc} from 'app/client/components/GristDoc';
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import {ViewFieldRec, ViewSectionRec} from 'app/client/models/DocModel';
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import {delay} from 'app/common/delay';
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import {waitObs} from 'app/common/gutil';
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import {TableData} from 'app/common/TableData';
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import {BaseFormatter, createFormatter} from 'app/common/ValueFormatter';
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import {Disposable, Observable} from 'grainjs';
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import debounce = require('lodash/debounce');
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/**
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* SearchModel used to maintain the state of the search UI.
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*/
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export interface SearchModel {
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value: Observable<string>; // string in the search input
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isOpen: Observable<boolean>; // indicates whether the search bar is expanded to show the input
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noMatch: Observable<boolean>; // indicates if there are no search matches
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isRunning: Observable<boolean>; // indicates that matching is in progress
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findNext(): Promise<void>; // find next match
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findPrev(): Promise<void>; // find previous match
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}
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interface SearchPosition {
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tabIndex: number;
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sectionIndex: number;
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rowIndex: number;
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fieldIndex: number;
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}
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class Stepper<T> {
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public array: ReadonlyArray<T> = [];
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public index: number = 0;
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public inRange() {
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return this.index >= 0 && this.index < this.array.length;
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}
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// Doing await at every step adds a ton of overhead; we can optimize by returning and waiting on
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// Promises only when needed.
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public next(step: number, nextArrayFunc: () => Promise<void>|void): Promise<void>|void {
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this.index += step;
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if (!this.inRange()) {
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// If index reached the end of the array, take a step at a higher level to get a new array.
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// For efficiency, only wait asynchronously if the callback returned a promise.
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const p = nextArrayFunc();
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if (p) {
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return p.then(() => this.setStart(step));
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} else {
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this.setStart(step);
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}
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}
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}
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public setStart(step: number) {
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this.index = step > 0 ? 0 : this.array.length - 1;
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}
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public get value(): T { return this.array[this.index]; }
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}
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/**
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* Implementation of SearchModel used to construct the search UI.
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*/
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export class SearchModelImpl extends Disposable implements SearchModel {
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public readonly value = Observable.create(this, '');
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public readonly isOpen = Observable.create(this, false);
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public readonly isRunning = Observable.create(this, false);
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public readonly noMatch = Observable.create(this, true);
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private _searchRegexp: RegExp;
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private _tabStepper = new Stepper<any>();
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private _sectionStepper = new Stepper<ViewSectionRec>();
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private _sectionTableData: TableData;
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private _rowStepper = new Stepper<number>();
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private _fieldStepper = new Stepper<ViewFieldRec>();
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private _fieldFormatters: BaseFormatter[];
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private _startPosition: SearchPosition;
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private _tabsSwitched: number = 0;
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constructor(private _gristDoc: GristDoc) {
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super();
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// Listen to input value changes (debounced) to activate searching.
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const findFirst = debounce((_value: string) => this._findFirst(_value), 100);
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this.autoDispose(this.value.addListener(v => { findFirst(v); }));
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}
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public async findNext() {
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if (this.noMatch.get()) { return; }
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this._startPosition = this._getCurrentPosition();
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await this._nextField(1);
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return this._matchNext(1);
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}
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public async findPrev() {
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if (this.noMatch.get()) { return; }
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this._startPosition = this._getCurrentPosition();
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await this._nextField(-1);
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return this._matchNext(-1);
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}
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private _findFirst(value: string) {
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if (!value) { this.noMatch.set(true); return; }
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this._searchRegexp = makeRegexp(value);
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const tabs: any[] = this._gristDoc.docModel.allDocPages.peek();
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this._tabStepper.array = tabs;
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this._tabStepper.index = tabs.findIndex(t => t.viewRef() === this._gristDoc.activeViewId.get());
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if (this._tabStepper.index < 0) { this.noMatch.set(true); return; }
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const view = this._tabStepper.value.view.peek();
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const sections: any[] = view.viewSections().peek();
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this._sectionStepper.array = sections;
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this._sectionStepper.index = sections.findIndex(s => s.getRowId() === view.activeSectionId());
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if (this._sectionStepper.index < 0) { this.noMatch.set(true); return; }
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this._initNewSectionShown();
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// Find the current cursor position in the current section.
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const viewInstance = this._sectionStepper.value.viewInstance.peek()!;
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const pos = viewInstance.cursor.getCursorPos();
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this._rowStepper.index = pos.rowIndex!;
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this._fieldStepper.index = pos.fieldIndex!;
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this._startPosition = this._getCurrentPosition();
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return this._matchNext(1);
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}
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private async _matchNext(step: number): Promise<void> {
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const indicatorTimer = setTimeout(() => this.isRunning.set(true), 300);
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try {
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const searchRegexp = this._searchRegexp;
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let count = 0;
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let lastBreak = Date.now();
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this._tabsSwitched = 0;
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while (!this._matches() || ((await this._loadSection(step)) && !this._matches())) {
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// To avoid hogging the CPU for too long, check time periodically, and if we've been running
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// for long enough, take a brief break. We choose a 5ms break every 20ms; and only check
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// time every 100 iterations, to avoid excessive overhead purely due to time checks.
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if ((++count) % 100 === 0 && Date.now() >= lastBreak + 20) {
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await delay(5);
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lastBreak = Date.now();
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// After other code had a chance to run, it's possible that we are now searching for
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// something else, in which case abort this task.
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if (this._searchRegexp !== searchRegexp) {
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console.log("SearchBar: aborting search since a new one was started");
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return;
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}
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}
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const p = this._nextField(step);
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if (p) { await p; }
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// Detect when we get back to the start position; this is where we break on no match.
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if (this._isCurrentPosition(this._startPosition)) {
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console.log("SearchBar: reached start position without finding anything");
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this.noMatch.set(true);
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return;
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}
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// A fail-safe to prevent certain bugs from causing infinite loops; break also if we scan
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// through tabs too many times.
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// TODO: test it by disabling the check above.
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if (this._tabsSwitched > this._tabStepper.array.length) {
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console.log("SearchBar: aborting search due to too many tab switches");
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this.noMatch.set(true);
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return;
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}
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}
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console.log("SearchBar: found a match at %s", JSON.stringify(this._getCurrentPosition()));
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this.noMatch.set(false);
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await this._highlight();
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} finally {
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clearTimeout(indicatorTimer);
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this.isRunning.set(false);
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}
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}
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private _getCurrentPosition(): SearchPosition {
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// It's important to call _getCurrentPosition() in the visible tab, since other tabs will not
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// use the currently visible version of the data (with the same sort and filter).
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return {
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tabIndex: this._tabStepper.index,
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sectionIndex: this._sectionStepper.index,
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rowIndex: this._rowStepper.index,
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fieldIndex: this._fieldStepper.index,
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};
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}
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private _isCurrentPosition(pos: SearchPosition): boolean {
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return (
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this._tabStepper.index === pos.tabIndex &&
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this._sectionStepper.index === pos.sectionIndex &&
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this._rowStepper.index === pos.rowIndex &&
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this._fieldStepper.index === pos.fieldIndex
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);
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}
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private _nextField(step: number): Promise<void>|void {
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return this._fieldStepper.next(step, () => this._nextRow(step));
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// console.log("nextField", this._fieldStepper.index);
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}
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private _nextRow(step: number) {
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return this._rowStepper.next(step, () => this._nextSection(step));
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// console.log("nextRow", this._rowStepper.index);
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}
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private async _nextSection(step: number) {
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// Switching sections is rare enough that we don't worry about optimizing away `await` calls.
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await this._sectionStepper.next(step, () => this._nextTab(step));
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// console.log("nextSection", this._sectionStepper.index);
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await this._initNewSectionAny();
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}
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// TODO There are issues with filtering. A section may have filters applied, and it may be
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// auto-filtered (linked sections). If a tab is shown, we have the filtered list of rowIds; if
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// the tab is not shown, it takes work to apply explicit filters. For linked sections, the
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// sensible behavior seems to scan through ALL values, then once a match is found, set the
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// cursor that determines the linking to include the matched row. And even that may not always
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// be possible. So this is an open question.
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private _initNewSectionCommon() {
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const section = this._sectionStepper.value;
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const tableModel = this._gristDoc.getTableModel(section.table.peek().tableId.peek());
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this._sectionTableData = tableModel.tableData;
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this._fieldStepper.array = section.viewFields().peek();
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this._fieldFormatters = this._fieldStepper.array.map(
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f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson()));
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return tableModel;
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}
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private _initNewSectionShown() {
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this._initNewSectionCommon();
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const viewInstance = this._sectionStepper.value.viewInstance.peek()!;
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this._rowStepper.array = viewInstance.sortedRows.getKoArray().peek() as number[];
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}
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private async _initNewSectionAny() {
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const tableModel = this._initNewSectionCommon();
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const viewInstance = this._sectionStepper.value.viewInstance.peek();
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if (viewInstance) {
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this._rowStepper.array = viewInstance.sortedRows.getKoArray().peek() as number[];
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} else {
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// If we are searching through another tab (not currently loaded), we will NOT have a
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// viewInstance, but we use the unsorted unfiltered row list, and if we find a match, the
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// _loadSection() method will load the tab and we'll repeat the search with a viewInstance.
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await tableModel.fetch();
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this._rowStepper.array = this._sectionTableData.getRowIds();
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}
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}
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private async _nextTab(step: number) {
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await this._tabStepper.next(step, () => undefined);
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this._tabsSwitched++;
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// console.log("nextTab", this._tabStepper.index);
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const view = this._tabStepper.value.view.peek();
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this._sectionStepper.array = view.viewSections().peek();
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}
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private _matches(): boolean {
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if (this._tabStepper.index < 0 || this._sectionStepper.index < 0 ||
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this._rowStepper.index < 0 || this._fieldStepper.index < 0) {
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console.warn("match outside");
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return false;
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}
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const field = this._fieldStepper.value;
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const formatter = this._fieldFormatters[this._fieldStepper.index];
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const rowId = this._rowStepper.value;
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const displayCol = field.displayColModel.peek();
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const value = this._sectionTableData.getValue(rowId, displayCol.colId.peek());
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// TODO: Note that formatting dates is now the bulk of the performance cost.
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const text = formatter.format(value);
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return this._searchRegexp.test(text);
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}
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private async _loadSection(step: number): Promise<boolean> {
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// If we found a match in a section for which we don't have a valid BaseView instance, we need
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// to load the BaseView and start searching the section again, since the match we found does
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// not take into account sort or filters. So we switch to the right tab, wait for the
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// viewInstance to be created, reset the section info, and return true to continue searching.
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const section = this._sectionStepper.value;
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if (!section.viewInstance.peek()) {
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const view = this._tabStepper.value.view.peek();
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await this._gristDoc.openDocPage(view.getRowId());
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console.log("SearchBar: loading view %s section %s", view.getRowId(), section.getRowId());
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const viewInstance: any = await waitObs(section.viewInstance);
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await viewInstance.getLoadingDonePromise();
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this._initNewSectionShown();
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this._rowStepper.setStart(step);
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this._fieldStepper.setStart(step);
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console.log("SearchBar: loaded view %s section %s", view.getRowId(), section.getRowId());
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return true;
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}
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return false;
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}
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// Highlights the cell at the current position.
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private async _highlight() {
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const view = this._tabStepper.value.view.peek();
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await this._gristDoc.openDocPage(view.getRowId());
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const section = this._sectionStepper.value;
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view.activeSectionId(section.getRowId());
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// We may need to wait for the BaseView instance to load.
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const viewInstance = await waitObs<any>(section.viewInstance);
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await viewInstance.getLoadingDonePromise();
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viewInstance.setCursorPos({
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rowIndex: this._rowStepper.index,
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fieldIndex: this._fieldStepper.index,
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});
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// Highlight the selected cursor, after giving it a chance to update. We find the cursor in
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// this ad-hoc way rather than use observables, to avoid the overhead of *every* cell
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// depending on an additional observable.
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await delay(0);
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const cursor = viewInstance.viewPane.querySelector('.selected_cursor');
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if (cursor) {
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cursor.classList.add('search-match');
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setTimeout(() => cursor.classList.remove('search-match'), 20);
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}
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}
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}
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function makeRegexp(value: string) {
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// From https://stackoverflow.com/a/3561711/328565
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const escaped = value.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
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return new RegExp(escaped, 'i');
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}
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