gristlabs_grist-core/app/client/models/entities/ColumnRec.ts

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import {KoArray} from 'app/client/lib/koArray';
import {DocModel, IRowModel, recordSet, refRecord, TableRec, ViewFieldRec} from 'app/client/models/DocModel';
import {jsonObservable, ObjObservable} from 'app/client/models/modelUtil';
import * as gristTypes from 'app/common/gristTypes';
import {removePrefix} from 'app/common/gutil';
import * as ko from 'knockout';
// Represents a column in a user-defined table.
export interface ColumnRec extends IRowModel<"_grist_Tables_column"> {
table: ko.Computed<TableRec>;
widgetOptionsJson: ObjObservable<any>;
viewFields: ko.Computed<KoArray<ViewFieldRec>>;
summarySource: ko.Computed<ColumnRec>;
// Is an empty column (undecided if formula or data); denoted by an empty formula.
isEmpty: ko.Computed<boolean>;
// Is a real formula column (not an empty column; i.e. contains a non-empty formula).
isRealFormula: ko.Computed<boolean>;
// Used for transforming a column.
// Reference to the original column for a transform column, or to itself for a non-transforming column.
origColRef: ko.Observable<number>;
origCol: ko.Computed<ColumnRec>;
// Indicates whether a column is transforming. Manually set, but should be true in both the original
// column being transformed and that column's transform column.
isTransforming: ko.Observable<boolean>;
// Convenience observable to obtain and set the type with no suffix
pureType: ko.Computed<string>;
// The column's display column
_displayColModel: ko.Computed<ColumnRec>;
disableModify: ko.Computed<boolean>;
disableEditData: ko.Computed<boolean>;
isHiddenCol: ko.Computed<boolean>;
// Returns the rowModel for the referenced table, or null, if is not a reference column.
refTable: ko.Computed<TableRec|null>;
// Helper which adds/removes/updates column's displayCol to match the formula.
saveDisplayFormula(formula: string): Promise<void>|undefined;
}
export function createColumnRec(this: ColumnRec, docModel: DocModel): void {
this.table = refRecord(docModel.tables, this.parentId);
this.widgetOptionsJson = jsonObservable(this.widgetOptions);
this.viewFields = recordSet(this, docModel.viewFields, 'colRef');
this.summarySource = refRecord(docModel.columns, this.summarySourceCol);
// Is this an empty column (undecided if formula or data); denoted by an empty formula.
this.isEmpty = ko.pureComputed(() => this.isFormula() && this.formula() === '');
// Is this a real formula column (not an empty column; i.e. contains a non-empty formula).
this.isRealFormula = ko.pureComputed(() => this.isFormula() && this.formula() !== '');
// Used for transforming a column.
// Reference to the original column for a transform column, or to itself for a non-transforming column.
this.origColRef = ko.observable(this.getRowId());
this.origCol = refRecord(docModel.columns, this.origColRef);
// Indicates whether a column is transforming. Manually set, but should be true in both the original
// column being transformed and that column's transform column.
this.isTransforming = ko.observable(false);
// Convenience observable to obtain and set the type with no suffix
this.pureType = ko.pureComputed(() => gristTypes.extractTypeFromColType(this.type()));
// The column's display column
this._displayColModel = refRecord(docModel.columns, this.displayCol);
// Helper which adds/removes/updates this column's displayCol to match the formula.
this.saveDisplayFormula = function(formula) {
if (formula !== (this._displayColModel().formula() || '')) {
return docModel.docData.sendAction(["SetDisplayFormula", this.table().tableId(),
null, this.getRowId(), formula]);
}
};
this.disableModify = ko.pureComputed(() => Boolean(this.summarySourceCol()));
this.disableEditData = ko.pureComputed(() => Boolean(this.summarySourceCol()));
this.isHiddenCol = ko.pureComputed(() => gristTypes.isHiddenCol(this.colId()));
// Returns the rowModel for the referenced table, or null, if this is not a reference column.
this.refTable = ko.pureComputed(() => {
const refTableId = removePrefix(this.type() || "", 'Ref:');
return refTableId ? docModel.allTables.all().find(t => t.tableId() === refTableId) || null : null;
});
}