gristlabs_grist-core/app/client/widgets/ReferenceEditor.ts

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import {ACResults, buildHighlightedDom, HighlightFunc} from 'app/client/lib/ACIndex';
import {Autocomplete} from 'app/client/lib/autocomplete';
import {ICellItem} from 'app/client/models/ColumnACIndexes';
import {reportError} from 'app/client/models/errors';
import {TableData} from 'app/client/models/TableData';
import {colors, testId, vars} from 'app/client/ui2018/cssVars';
import {icon} from 'app/client/ui2018/icons';
import {menuCssClass} from 'app/client/ui2018/menus';
import {Options} from 'app/client/widgets/NewBaseEditor';
import {NTextEditor} from 'app/client/widgets/NTextEditor';
import {CellValue} from 'app/common/DocActions';
import {removePrefix, undef} from 'app/common/gutil';
import {BaseFormatter} from 'app/common/ValueFormatter';
import {styled} from 'grainjs';
/**
* A ReferenceEditor offers an autocomplete of choices from the referenced table.
*/
export class ReferenceEditor extends NTextEditor {
private _tableData: TableData;
private _formatter: BaseFormatter;
private _enableAddNew: boolean;
private _showAddNew: boolean = false;
private _visibleCol: string;
private _autocomplete?: Autocomplete<ICellItem>;
constructor(options: Options) {
super(options);
const field = options.field;
// Get the table ID to which the reference points.
const refTableId = removePrefix(field.column().type(), "Ref:");
if (!refTableId) {
throw new Error("ReferenceEditor used for non-Reference column");
}
const docData = options.gristDoc.docData;
const tableData = docData.getTable(refTableId);
if (!tableData) {
throw new Error("ReferenceEditor: invalid referenced table");
}
this._tableData = tableData;
// Construct the formatter for the displayed values using the options from the target column.
this._formatter = field.createVisibleColFormatter();
// Whether we should enable the "Add New" entry to allow adding new items to the target table.
const vcol = field.visibleColModel();
this._enableAddNew = vcol && !vcol.isRealFormula() && !!vcol.colId();
this._visibleCol = vcol.colId() || 'id';
// Decorate the editor to look like a reference column value (with a "link" icon).
// But not on readonly mode - here we will reuse default decoration
if (!options.readonly) {
this.cellEditorDiv.classList.add(cssRefEditor.className);
this.cellEditorDiv.appendChild(cssRefEditIcon('FieldReference'));
}
this.textInput.value = undef(options.state, options.editValue, this._idToText(options.cellValue));
const needReload = (options.editValue === undefined && !tableData.isLoaded);
// The referenced table has probably already been fetched (because there must already be a
// Reference widget instantiated), but it's better to avoid this assumption.
docData.fetchTable(refTableId).then(() => {
if (this.isDisposed()) { return; }
if (needReload && this.textInput.value === '') {
this.textInput.value = undef(options.state, options.editValue, this._idToText(options.cellValue));
this.resizeInput();
}
if (this._autocomplete) {
if (options.editValue === undefined) {
this._autocomplete.search((items) => items.findIndex((item) => item.rowId === options.cellValue));
} else {
this._autocomplete.search();
}
}
})
.catch(reportError);
}
public attach(cellElem: Element): void {
super.attach(cellElem);
// don't create autocomplete for readonly mode
if (this.options.readonly) { return; }
this._autocomplete = this.autoDispose(new Autocomplete<ICellItem>(this.textInput, {
menuCssClass: menuCssClass + ' ' + cssRefList.className,
search: this._doSearch.bind(this),
renderItem: this._renderItem.bind(this),
getItemText: (item) => item.text,
onClick: () => this.options.commands.fieldEditSaveHere(),
}));
}
/**
* If the 'new' item is saved, add it to the referenced table first. See _buildSourceList
*/
public async prepForSave() {
const selectedItem = this._autocomplete && this._autocomplete.getSelectedItem();
if (selectedItem &&
selectedItem.rowId === 'new' &&
selectedItem.text === this.textInput.value) {
const colInfo = {[this._visibleCol]: this.textInput.value};
selectedItem.rowId = await this._tableData.sendTableAction(["AddRecord", null, colInfo]);
}
}
public getCellValue() {
const selectedItem = this._autocomplete && this._autocomplete.getSelectedItem();
if (selectedItem) {
// Selected from the autocomplete dropdown; so we know the *value* (i.e. rowId).
return selectedItem.rowId;
} else if (nocaseEqual(this.textInput.value, this._idToText(this.options.cellValue))) {
// Unchanged from what's already in the cell.
return this.options.cellValue;
}
// Search for textInput's value, or else use the typed value itself (as alttext).
if (this.textInput.value === '') {
return 0; // This is the default value for a reference column.
}
const searchFunc = (value: any) => nocaseEqual(value, this.textInput.value);
const matches = this._tableData.columnSearch(this._visibleCol, this._formatter, searchFunc, 1);
if (matches.length > 0) {
return matches[0].value;
} else {
const value = this.textInput.value;
if (this._visibleCol === 'id') {
// If the value is a valid number (non-NaN), save as a numeric rowId; else as text.
return +value || value;
}
return value;
}
}
private _idToText(value: CellValue) {
if (typeof value === 'number') {
return this._formatter.formatAny(this._tableData.getValue(value, this._visibleCol));
}
return String(value || '');
}
/**
* If the search text does not match anything exactly, adds 'new' item to it.
*
* Also see: prepForSave.
*/
private async _doSearch(text: string): Promise<ACResults<ICellItem>> {
const acIndex = this._tableData.columnACIndexes.getColACIndex(this._visibleCol, this._formatter);
const result = acIndex.search(text);
this._showAddNew = false;
if (!this._enableAddNew || !text) { return result; }
const cleanText = text.trim().toLowerCase();
if (result.items.find((item) => item.cleanText === cleanText)) {
return result;
}
result.items.push({rowId: 'new', text, cleanText});
this._showAddNew = true;
return result;
}
private _renderItem(item: ICellItem, highlightFunc: HighlightFunc) {
return renderACItem(item.text, highlightFunc, item.rowId === 'new', this._showAddNew);
}
}
export function renderACItem(text: string, highlightFunc: HighlightFunc, isAddNew: boolean, withSpaceForNew: boolean) {
if (isAddNew) {
return cssRefItem(cssRefItem.cls('-new'),
cssPlusButton(cssPlusIcon('Plus')), text,
testId('ref-editor-item'), testId('ref-editor-new-item'),
);
}
return cssRefItem(cssRefItem.cls('-with-new', withSpaceForNew),
buildHighlightedDom(text, highlightFunc, cssMatchText),
testId('ref-editor-item'),
);
}
function nocaseEqual(a: string, b: string) {
return a.trim().toLowerCase() === b.trim().toLowerCase();
}
const cssRefEditor = styled('div', `
& > .celleditor_text_editor, & > .celleditor_content_measure {
padding-left: 18px;
}
`);
const cssRefList = styled('div', `
overflow-y: auto;
padding: 8px 0 0 0;
--weaseljs-menu-item-padding: 8px 16px;
`);
// We need to now the height of the sticky "+" element.
const addNewHeight = '37px';
const cssRefItem = styled('li', `
display: block;
font-family: ${vars.fontFamily};
white-space: pre;
overflow: hidden;
text-overflow: ellipsis;
outline: none;
padding: var(--weaseljs-menu-item-padding, 8px 24px);
cursor: pointer;
&.selected {
background-color: var(--weaseljs-selected-background-color, #5AC09C);
color: var(--weaseljs-selected-color, white);
}
&-with-new {
scroll-margin-bottom: ${addNewHeight};
}
&-new {
color: ${colors.slate};
position: sticky;
bottom: 0px;
height: ${addNewHeight};
background-color: white;
border-top: 1px solid ${colors.mediumGrey};
scroll-margin-bottom: initial;
}
&-new.selected {
color: ${colors.lightGrey};
}
`);
const cssPlusButton = styled('div', `
display: inline-block;
width: 20px;
height: 20px;
border-radius: 20px;
margin-right: 8px;
text-align: center;
background-color: ${colors.lightGreen};
color: ${colors.light};
.selected > & {
background-color: ${colors.darkGreen};
}
`);
const cssPlusIcon = styled(icon, `
background-color: ${colors.light};
`);
const cssRefEditIcon = styled(icon, `
background-color: ${colors.slate};
position: absolute;
top: 0;
left: 0;
margin: 3px 3px 0 3px;
`);
const cssMatchText = styled('span', `
color: ${colors.lightGreen};
.selected > & {
color: ${colors.lighterGreen};
}
`);