gristlabs_grist-core/app/client/widgets/FieldEditor.ts
Jarosław Sadziński 5f182841b9 (core) Document keeps track of latest cursor position and latest editor value and is able to restore them when it is reloaded.
Summary: Grist document, when reloaded, is able to restore the latest cursor position and the editor state.

Test Plan: Browser test were created.

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: paulfitz

Differential Revision: https://phab.getgrist.com/D2808
2021-05-18 10:36:59 +02:00

404 lines
16 KiB
TypeScript

import * as commands from 'app/client/components/commands';
import {Cursor} from 'app/client/components/Cursor';
import {GristDoc} from 'app/client/components/GristDoc';
import {UnsavedChange} from 'app/client/components/UnsavedChanges';
import {DataRowModel} from 'app/client/models/DataRowModel';
import {ColumnRec} from 'app/client/models/entities/ColumnRec';
import {ViewFieldRec} from 'app/client/models/entities/ViewFieldRec';
import {reportError} from 'app/client/models/errors';
import {showTooltipToCreateFormula} from 'app/client/widgets/EditorTooltip';
import {FormulaEditor} from 'app/client/widgets/FormulaEditor';
import {IEditorCommandGroup, NewBaseEditor} from 'app/client/widgets/NewBaseEditor';
import {asyncOnce} from "app/common/AsyncCreate";
import {CellValue} from "app/common/DocActions";
import {isRaisedException} from 'app/common/gristTypes';
import * as gutil from 'app/common/gutil';
import {Disposable, Emitter, Holder, IDisposable, MultiHolder, Observable} from 'grainjs';
import isEqual = require('lodash/isEqual');
import { CellPosition } from "app/client/components/CellPosition";
type IEditorConstructor = typeof NewBaseEditor;
/**
* Check if the typed-in value should change the cell without opening the cell editor, and if so,
* saves and returns true. E.g. on typing space, CheckBoxEditor toggles the cell without opening.
*/
export function saveWithoutEditor(
editorCtor: IEditorConstructor, editRow: DataRowModel, field: ViewFieldRec, typedVal: string|undefined
): boolean {
// Never skip the editor if editing a formula. Also, check that skipEditor static function
// exists (we don't bother adding it on old-style JS editors that don't need it).
if (!field.column.peek().isRealFormula.peek() && editorCtor.skipEditor) {
const origVal = editRow.cells[field.colId()].peek();
const skipEditorValue = editorCtor.skipEditor(typedVal, origVal);
if (skipEditorValue !== undefined) {
setAndSave(editRow, field, skipEditorValue).catch(reportError);
return true;
}
}
return false;
}
// Set the given field of editRow to value, only if different from the current value of the cell.
export async function setAndSave(editRow: DataRowModel, field: ViewFieldRec, value: CellValue): Promise<void> {
const obs = editRow.cells[field.colId()];
if (!isEqual(value, obs.peek())) {
return obs.setAndSave(value);
}
}
export type FieldEditorStateEvent = {
position : CellPosition,
currentState : any,
type: string
}
export class FieldEditor extends Disposable {
public readonly saveEmitter = this.autoDispose(new Emitter());
public readonly cancelEmitter = this.autoDispose(new Emitter());
public readonly changeEmitter = this.autoDispose(new Emitter());
private _gristDoc: GristDoc;
private _field: ViewFieldRec;
private _cursor: Cursor;
private _editRow: DataRowModel;
private _cellElem: Element;
private _editCommands: IEditorCommandGroup;
private _editorCtor: IEditorConstructor;
private _editorHolder: Holder<NewBaseEditor> = Holder.create(this);
private _saveEdit = asyncOnce(() => this._doSaveEdit());
constructor(options: {
gristDoc: GristDoc,
field: ViewFieldRec,
cursor: Cursor,
editRow: DataRowModel,
cellElem: Element,
editorCtor: IEditorConstructor,
startVal?: string,
state?: any
}) {
super();
this._gristDoc = options.gristDoc;
this._field = options.field;
this._cursor = options.cursor;
this._editRow = options.editRow;
this._editorCtor = options.editorCtor;
this._cellElem = options.cellElem;
const startVal = options.startVal;
let offerToMakeFormula = false;
const column = this._field.column();
let isFormula: boolean = column.isRealFormula.peek();
let editValue: string|undefined = startVal;
if (startVal && gutil.startsWith(startVal, '=')) {
if (isFormula || this._field.column().isEmpty()) {
// If we typed '=' on an empty column, convert it to a formula. If on a formula column,
// start editing ignoring the initial '='.
isFormula = true;
editValue = gutil.removePrefix(startVal, '=') as string;
} else {
// If we typed '=' on a non-empty column, only suggest to convert it to a formula.
offerToMakeFormula = true;
}
}
// These are the commands for while the editor is active.
this._editCommands = {
// _saveEdit disables this command group, so when we run fieldEditSave again, it triggers
// another registered group, if any. E.g. GridView listens to it to move the cursor down.
fieldEditSave: () => {
this._saveEdit().then((jumped: boolean) => {
// To avoid confusing cursor movement, do not increment the rowIndex if the row
// was re-sorted after editing.
if (!jumped) { commands.allCommands.fieldEditSave.run(); }
})
.catch(reportError);
},
fieldEditSaveHere: () => { this._saveEdit().catch(reportError); },
fieldEditCancel: () => { this._cancelEdit(); },
prevField: () => { this._saveEdit().then(commands.allCommands.prevField.run).catch(reportError); },
nextField: () => { this._saveEdit().then(commands.allCommands.nextField.run).catch(reportError); },
makeFormula: () => this._makeFormula(),
unmakeFormula: () => this._unmakeFormula(),
};
const state : any = options.state;
this.rebuildEditor(isFormula, editValue, Number.POSITIVE_INFINITY, state);
if (offerToMakeFormula) {
this._offerToMakeFormula();
}
// connect this editor to editor monitor, it will restore this editor
// when user or server refreshes the browser
this._gristDoc.editorMonitor.monitorEditor(this);
setupEditorCleanup(this, this._gristDoc, this._field, this._saveEdit);
}
// cursorPos refers to the position of the caret within the editor.
public rebuildEditor(isFormula: boolean, editValue: string|undefined, cursorPos: number, state? : any) {
const editorCtor: IEditorConstructor = isFormula ? FormulaEditor : this._editorCtor;
const column = this._field.column();
const cellCurrentValue = this._editRow.cells[this._field.colId()].peek();
const cellValue = column.isFormula() ? column.formula() : cellCurrentValue;
// Enter formula-editing mode (e.g. click-on-column inserts its ID) only if we are opening the
// editor by typing into it (and overriding previous formula). In other cases (e.g. double-click),
// we defer this mode until the user types something.
this._field.editingFormula(isFormula && editValue !== undefined);
// Replace the item in the Holder with a new one, disposing the previous one.
const editor = this._editorHolder.autoDispose(editorCtor.create({
gristDoc: this._gristDoc,
field: this._field,
cellValue,
formulaError: getFormulaError(this._gristDoc, this._editRow, column),
editValue,
cursorPos,
state,
commands: this._editCommands,
}));
// if editor supports live changes, connect it to the change emitter
if (editor.editorState) {
editor.autoDispose(editor.editorState.addListener((currentState) => {
const event : FieldEditorStateEvent = {
position : this.cellPosition(),
currentState,
type : this._field.column.peek().pureType.peek()
}
this.changeEmitter.emit(event);
}));
}
editor.attach(this._cellElem);
}
// calculate current cell's absolute position
private cellPosition() {
const rowId = this._editRow.getRowId();
const colRef = this._field.colRef.peek();
const sectionId = this._field.viewSection.peek().id.peek();
const position = {
rowId,
colRef,
sectionId
}
return position;
}
private _makeFormula() {
const editor = this._editorHolder.get();
// On keyPress of "=" on textInput, consider turning the column into a formula.
if (editor && !this._field.editingFormula.peek() && editor.getCursorPos() === 0) {
if (this._field.column().isEmpty()) {
// If we typed '=' an empty column, convert it to a formula.
this.rebuildEditor(true, editor.getTextValue(), 0);
return false;
} else {
// If we typed '=' on a non-empty column, only suggest to convert it to a formula.
this._offerToMakeFormula();
}
}
return true; // don't stop propagation.
}
private _unmakeFormula() {
const editor = this._editorHolder.get();
// Only convert to data if we are undoing a to-formula conversion. To convert formula to
// data, use column menu option, or delete the formula first (which makes the column "empty").
if (editor && this._field.editingFormula.peek() && editor.getCursorPos() === 0 &&
!this._field.column().isRealFormula()) {
// Restore a plain '=' character. This gives a way to enter "=" at the start if line. The
// second backspace will delete it.
this.rebuildEditor(false, '=' + editor.getTextValue(), 1);
return false;
}
return true; // don't stop propagation.
}
private _offerToMakeFormula() {
const editorDom = this._editorHolder.get()?.getDom();
if (!editorDom) { return; }
showTooltipToCreateFormula(editorDom, () => this._convertEditorToFormula());
}
private _convertEditorToFormula() {
const editor = this._editorHolder.get();
if (editor) {
const editValue = editor.getTextValue();
const formulaValue = editValue.startsWith('=') ? editValue.slice(1) : editValue;
this.rebuildEditor(true, formulaValue, 0);
}
}
// Cancels the edit
private _cancelEdit() {
const event : FieldEditorStateEvent = {
position : this.cellPosition(),
currentState : this._editorHolder.get()?.editorState?.get(),
type : this._field.column.peek().pureType.peek()
}
this.cancelEmitter.emit(event);
this.dispose();
}
// Returns true if Enter/Shift+Enter should NOT move the cursor, for instance if the current
// record got reordered (i.e. the cursor jumped), or when editing a formula.
private async _doSaveEdit(): Promise<boolean> {
const editor = this._editorHolder.get();
if (!editor) { return false; }
// Make sure the editor is save ready
const saveIndex = this._cursor.rowIndex();
await editor.prepForSave();
if (this.isDisposed()) {
// We shouldn't normally get disposed here, but if we do, avoid confusing JS errors.
console.warn("Unable to finish saving edited cell"); // tslint:disable-line:no-console
return false;
}
// Then save the value the appropriate way
// TODO: this isFormula value doesn't actually reflect if editing the formula, since
// editingFormula() is used for toggling column headers, and this is deferred to start of
// typing (a double-click or Enter) does not immediately set it. (This can cause a
// console.warn below, although harmless.)
const isFormula = this._field.editingFormula();
const col = this._field.column();
let waitPromise: Promise<unknown>|null = null;
if (isFormula) {
const formula = editor.getCellValue();
// Bundle multiple changes so that we can undo them in one step.
if (isFormula !== col.isFormula.peek() || formula !== col.formula.peek()) {
waitPromise = this._gristDoc.docData.bundleActions(null, () => Promise.all([
col.updateColValues({isFormula, formula}),
// If we're saving a non-empty formula, then also add an empty record to the table
// so that the formula calculation is visible to the user.
(this._editRow._isAddRow.peek() && formula !== "" ?
this._editRow.updateColValues({}) : undefined),
]));
}
} else {
const value = editor.getCellValue();
if (col.isRealFormula()) {
// tslint:disable-next-line:no-console
console.warn("It should be impossible to save a plain data value into a formula column");
} else {
// This could still be an isFormula column if it's empty (isEmpty is true), but we don't
// need to toggle isFormula in that case, since the data engine takes care of that.
waitPromise = setAndSave(this._editRow, this._field, value);
}
}
const event : FieldEditorStateEvent = {
position : this.cellPosition(),
currentState : this._editorHolder.get()?.editorState?.get(),
type : this._field.column.peek().pureType.peek()
}
this.saveEmitter.emit(event);
const cursor = this._cursor;
// Deactivate the editor. We are careful to avoid using `this` afterwards.
this.dispose();
await waitPromise;
return isFormula || (saveIndex !== cursor.rowIndex());
}
}
/**
* Open a formula editor in the side pane. Returns a Disposable that owns the editor.
*/
export function openSideFormulaEditor(options: {
gristDoc: GristDoc,
field: ViewFieldRec,
editRow: DataRowModel, // Needed to get exception value, if any.
refElem: Element, // Element in the side pane over which to position the editor.
}): IDisposable {
const {gristDoc, field, editRow, refElem} = options;
const holder = MultiHolder.create(null);
const column = field.column();
// AsyncOnce ensures it's called once even if triggered multiple times.
const saveEdit = asyncOnce(async () => {
const formula = editor.getCellValue();
if (formula !== column.formula.peek()) {
await column.updateColValues({formula});
}
holder.dispose(); // Deactivate the editor.
});
// These are the commands for while the editor is active.
const editCommands = {
fieldEditSave: () => { saveEdit().catch(reportError); },
fieldEditSaveHere: () => { saveEdit().catch(reportError); },
fieldEditCancel: () => { holder.dispose(); },
};
// Replace the item in the Holder with a new one, disposing the previous one.
const editor = FormulaEditor.create(holder, {
gristDoc,
field,
cellValue: column.formula(),
formulaError: getFormulaError(gristDoc, editRow, column),
editValue: undefined,
cursorPos: Number.POSITIVE_INFINITY, // Position of the caret within the editor.
commands: editCommands,
cssClass: 'formula_editor_sidepane',
});
editor.attach(refElem);
// Enter formula-editing mode (highlight formula icons; click on a column inserts its ID).
field.editingFormula(true);
setupEditorCleanup(holder, gristDoc, field, saveEdit);
return holder;
}
/**
* For an active editor, set up its cleanup:
* - saving on click-away (when focus returns to Grist "clipboard" element)
* - unset field.editingFormula mode
* - Arrange for UnsavedChange protection against leaving the page with unsaved changes.
*/
function setupEditorCleanup(
owner: MultiHolder, gristDoc: GristDoc, field: ViewFieldRec, saveEdit: () => Promise<unknown>
) {
// Whenever focus returns to the Clipboard component, close the editor by saving the value.
gristDoc.app.on('clipboard_focus', saveEdit);
// TODO: This should ideally include a callback that returns true only when the editor value
// has changed. Currently an open editor is considered unsaved even when unchanged.
UnsavedChange.create(owner, async () => { await saveEdit(); });
owner.onDispose(() => {
gristDoc.app.off('clipboard_focus', saveEdit);
// Unset field.editingFormula flag when the editor closes.
field.editingFormula(false);
});
}
/**
* If the cell at the given row and column is a formula value containing an exception, return an
* observable with this exception, and fetch more details to add to the observable.
*/
function getFormulaError(
gristDoc: GristDoc, editRow: DataRowModel, column: ColumnRec
): Observable<CellValue>|undefined {
const colId = column.colId.peek();
let formulaError: Observable<CellValue>|undefined;
const cellCurrentValue = editRow.cells[colId].peek();
if (column.isFormula() && isRaisedException(cellCurrentValue)) {
const fv = formulaError = Observable.create(null, cellCurrentValue);
gristDoc.docData.getFormulaError(column.table().tableId(), colId, editRow.getRowId())
.then(value => { fv.set(value); })
.catch(reportError);
}
return formulaError;
}