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

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import {ColumnRec, DocModel, IRowModel, refRecord, ViewSectionRec} from 'app/client/models/DocModel';
import * as modelUtil from 'app/client/models/modelUtil';
import * as UserType from 'app/client/widgets/UserType';
import {BaseFormatter, createFormatter} from 'app/common/ValueFormatter';
import {Computed, fromKo} from 'grainjs';
import * as ko from 'knockout';
// Represents a page entry in the tree of pages.
export interface ViewFieldRec extends IRowModel<"_grist_Views_section_field"> {
viewSection: ko.Computed<ViewSectionRec>;
widthDef: modelUtil.KoSaveableObservable<number>;
widthPx: ko.Computed<string>;
column: ko.Computed<ColumnRec>;
origCol: ko.Computed<ColumnRec>;
colId: ko.Computed<string>;
label: ko.Computed<string>;
// displayLabel displays label by default but switches to the more helpful colId whenever a
// formula field in the view is being edited.
displayLabel: modelUtil.KoSaveableObservable<string>;
// The field knows when we are editing a formula, so that all rows can reflect that.
editingFormula: ko.Computed<boolean>;
// CSS class to add to formula cells, incl. to show that we are editing field's formula.
formulaCssClass: ko.Computed<string|null>;
// The fields's display column
_displayColModel: ko.Computed<ColumnRec>;
// Whether field uses column's widgetOptions (true) or its own (false).
// During transform, use the transform column's options (which should be initialized to match
// field or column when the transform starts TODO).
useColOptions: ko.Computed<boolean>;
// Helper that returns the RowModel for either field or its column, depending on
// useColOptions. Field and Column have a few identical fields:
// .widgetOptions() // JSON string of options
// .saveDisplayFormula() // Method to save the display formula
// .displayCol() // Reference to an optional associated display column.
_fieldOrColumn: ko.Computed<ColumnRec|ViewFieldRec>;
// Display col ref to use for the field, defaulting to the plain column itself.
displayColRef: ko.Computed<number>;
visibleColRef: modelUtil.KoSaveableObservable<number>;
// The display column to use for the field, or the column itself when no displayCol is set.
displayColModel: ko.Computed<ColumnRec>;
visibleColModel: ko.Computed<ColumnRec>;
// The widgetOptions to read and write: either the column's or the field's own.
_widgetOptionsStr: modelUtil.KoSaveableObservable<string>;
// Observable for the object with the current options, either for the field or for the column,
// which takes into account the default options for column's type.
widgetOptionsJson: modelUtil.SaveableObjObservable<any>;
// Whether lines should wrap in a cell.
wrapping: ko.Computed<boolean>;
// Observable for the parsed filter object saved to the field.
activeFilter: modelUtil.CustomComputed<string>;
// Computed boolean that's true when there's a saved filter
isFiltered: Computed<boolean>;
disableModify: ko.Computed<boolean>;
disableEditData: ko.Computed<boolean>;
textColor: modelUtil.KoSaveableObservable<string|undefined>;
fillColor: modelUtil.KoSaveableObservable<string>;
// Helper which adds/removes/updates field's displayCol to match the formula.
saveDisplayFormula(formula: string): Promise<void>|undefined;
// Helper for Reference columns, which returns a formatter according to the visibleCol
// associated with field. Subscribes to observables if used within a computed.
createVisibleColFormatter(): BaseFormatter;
}
export function createViewFieldRec(this: ViewFieldRec, docModel: DocModel): void {
this.viewSection = refRecord(docModel.viewSections, this.parentId);
this.widthDef = modelUtil.fieldWithDefault(this.width, () => this.viewSection().defaultWidth());
this.widthPx = ko.pureComputed(() => this.widthDef() + 'px');
this.column = refRecord(docModel.columns, this.colRef);
this.origCol = ko.pureComputed(() => this.column().origCol());
this.colId = ko.pureComputed(() => this.column().colId());
this.label = ko.pureComputed(() => this.column().label());
// displayLabel displays label by default but switches to the more helpful colId whenever a
// formula field in the view is being edited.
this.displayLabel = modelUtil.savingComputed({
read: () => docModel.editingFormula() ? '$' + this.origCol().colId() : this.origCol().label(),
write: (setter, val) => setter(this.column().label, val)
});
// The field knows when we are editing a formula, so that all rows can reflect that.
const _editingFormula = ko.observable(false);
this.editingFormula = ko.pureComputed({
read: () => _editingFormula(),
write: val => {
// Whenever any view field changes its editingFormula status, let the docModel know.
docModel.editingFormula(val);
_editingFormula(val);
}
});
// CSS class to add to formula cells, incl. to show that we are editing this field's formula.
this.formulaCssClass = ko.pureComputed<string|null>(() => {
const col = this.column();
return this.column().isTransforming() ? "transform_field" :
(this.editingFormula() ? "formula_field_edit" :
(col.isFormula() && col.formula() !== "" ? "formula_field" : null));
});
// The fields's display column
this._displayColModel = refRecord(docModel.columns, this.displayCol);
// Helper which adds/removes/updates this field's displayCol to match the formula.
this.saveDisplayFormula = function(formula) {
if (formula !== (this._displayColModel().formula() || '')) {
return docModel.docData.sendAction(["SetDisplayFormula", this.column().table().tableId(),
this.getRowId(), null, formula]);
}
};
// Whether this field uses column's widgetOptions (true) or its own (false).
// During transform, use the transform column's options (which should be initialized to match
// field or column when the transform starts TODO).
this.useColOptions = ko.pureComputed(() => !this.widgetOptions() || this.column().isTransforming());
// Helper that returns the RowModel for either this field or its column, depending on
// useColOptions. Field and Column have a few identical fields:
// .widgetOptions() // JSON string of options
// .saveDisplayFormula() // Method to save the display formula
// .displayCol() // Reference to an optional associated display column.
this._fieldOrColumn = ko.pureComputed(() => this.useColOptions() ? this.column() : this);
// Display col ref to use for the field, defaulting to the plain column itself.
this.displayColRef = ko.pureComputed(() => this._fieldOrColumn().displayCol() || this.colRef());
this.visibleColRef = modelUtil.addSaveInterface(ko.pureComputed({
read: () => this._fieldOrColumn().visibleCol(),
write: (colRef) => this._fieldOrColumn().visibleCol(colRef),
}),
colRef => docModel.docData.bundleActions(null, async () => {
const col = docModel.columns.getRowModel(colRef);
await Promise.all([
this._fieldOrColumn().visibleCol.saveOnly(colRef),
this._fieldOrColumn().saveDisplayFormula(colRef ? `$${this.colId()}.${col.colId()}` : '')
]);
}, {nestInActiveBundle: this.column.peek().isTransforming.peek()})
);
// The display column to use for the field, or the column itself when no displayCol is set.
this.displayColModel = refRecord(docModel.columns, this.displayColRef);
this.visibleColModel = refRecord(docModel.columns, this.visibleColRef);
// Helper for Reference columns, which returns a formatter according to the visibleCol
// associated with this field. If no visible column available, return formatting for the field itself.
// Subscribes to observables if used within a computed.
// TODO: It would be better to replace this with a pureComputed whose value is a formatter.
this.createVisibleColFormatter = function() {
const vcol = this.visibleColModel();
return (vcol.getRowId() !== 0) ?
createFormatter(vcol.type(), vcol.widgetOptionsJson()) :
createFormatter(this.column().type(), this.widgetOptionsJson());
};
// The widgetOptions to read and write: either the column's or the field's own.
this._widgetOptionsStr = modelUtil.savingComputed({
read: () => this._fieldOrColumn().widgetOptions(),
write: (setter, val) => setter(this._fieldOrColumn().widgetOptions, val)
});
// Observable for the object with the current options, either for the field or for the column,
// which takes into account the default options for this column's type.
this.widgetOptionsJson = modelUtil.jsonObservable(this._widgetOptionsStr,
(opts: any) => UserType.mergeOptions(opts || {}, this.column().pureType()));
this.wrapping = ko.pureComputed(() => {
// When user has yet to specify a desired wrapping state, we use different defaults for
// GridView (no wrap) and DetailView (wrap).
// "??" is the newish "nullish coalescing" operator. How cool is that!
return this.widgetOptionsJson().wrap ?? (this.viewSection().parentKey() !== 'record');
});
// Observable for the active filter that's initialized from the value saved to the server.
this.activeFilter = modelUtil.customComputed({
read: () => { const f = this.filter(); return f === 'null' ? '' : f; }, // To handle old empty filters
save: (val) => this.filter.saveOnly(val),
});
this.isFiltered = Computed.create(this, fromKo(this.activeFilter), (_use, f) => f !== '');
this.disableModify = ko.pureComputed(() => this.column().disableModify());
this.disableEditData = ko.pureComputed(() => this.column().disableEditData());
this.textColor = this.widgetOptionsJson.prop('textColor') as modelUtil.KoSaveableObservable<string>;
const fillColorProp = modelUtil.fieldWithDefault(
this.widgetOptionsJson.prop('fillColor') as modelUtil.KoSaveableObservable<string>, "#FFFFFF00");
// Store empty string in place of the default white color, so that we can keep it transparent in
// GridView, to avoid interfering with zebra stripes.
this.fillColor = modelUtil.savingComputed({
read: () => fillColorProp(),
write: (setter, val) => setter(fillColorProp, val.toUpperCase() === '#FFFFFF' ? '' : val),
});
}