gristlabs_grist-core/app/client/components/FormRenderer.ts

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import * as css from 'app/client/components/FormRendererCss';
import {FormField} from 'app/client/ui/FormAPI';
import {sanitizeHTML} from 'app/client/ui/sanitizeHTML';
import {dropdownWithSearch} from 'app/client/ui/searchDropdown';
import {isXSmallScreenObs} from 'app/client/ui2018/cssVars';
import {confirmModal} from 'app/client/ui2018/modals';
import {CellValue} from 'app/plugin/GristData';
import {Disposable, dom, DomContents, makeTestId, MutableObsArray, obsArray, Observable} from 'grainjs';
import {marked} from 'marked';
import {IPopupOptions, PopupControl} from 'popweasel';
const testId = makeTestId('test-form-');
/**
* A node in a recursive, tree-like hierarchy comprising the layout of a form.
*/
export interface FormLayoutNode {
/** Unique ID of the node. Used by FormView. */
id: string;
type: FormLayoutNodeType;
children?: Array<FormLayoutNode>;
// Used by Layout.
submitText?: string;
successURL?: string;
successText?: string;
anotherResponse?: boolean;
// Used by Field.
formRequired?: boolean;
leaf?: number;
// Used by Label and Paragraph.
text?: string;
// Used by Paragraph.
alignment?: string;
}
export type FormLayoutNodeType =
| 'Paragraph'
| 'Section'
| 'Columns'
| 'Submit'
| 'Placeholder'
| 'Layout'
| 'Field'
| 'Label'
| 'Separator'
| 'Header';
/**
* Context used by FormRenderer to build each node.
*/
export interface FormRendererContext {
/** Field metadata, keyed by field id. */
fields: Record<number, FormField>;
/** The root of the FormLayoutNode tree. */
rootLayoutNode: FormLayoutNode;
/** Disables the Submit node if true. */
disabled: Observable<boolean>;
/** Error to show above the Submit node. */
error: Observable<string|null>;
}
/**
* Returns a copy of `layoutSpec` with any leaf nodes that don't exist
* in `fieldIds` removed.
*/
export function patchLayoutSpec(
layoutSpec: FormLayoutNode,
fieldIds: Set<number>
): FormLayoutNode | null {
if (layoutSpec.leaf && !fieldIds.has(layoutSpec.leaf)) { return null; }
return {
...layoutSpec,
children: layoutSpec.children
?.map(child => patchLayoutSpec(child, fieldIds))
.filter((child): child is FormLayoutNode => child !== null),
};
}
/**
* A renderer for a form layout.
*
* Takes the root FormLayoutNode and additional context for each node, and returns
* the DomContents of the rendered form.
*
* A closely related set of classes exist in `app/client/components/Forms/*`; those are
* specifically used to render a version of a form that is suitable for displaying within
* a Form widget, where submitting a form isn't possible.
*
* TODO: merge the two implementations or factor out what's common.
*/
export abstract class FormRenderer extends Disposable {
public static new(
layoutNode: FormLayoutNode,
context: FormRendererContext,
parent?: FormRenderer
): FormRenderer {
const Renderer = FormRenderers[layoutNode.type] ?? ParagraphRenderer;
return new Renderer(layoutNode, context, parent);
}
protected children: FormRenderer[];
constructor(
protected layoutNode: FormLayoutNode,
protected context: FormRendererContext,
protected parent?: FormRenderer
) {
super();
this.children = (this.layoutNode.children ?? []).map((child) =>
this.autoDispose(FormRenderer.new(child, this.context, this)));
}
public abstract render(): DomContents;
/**
* Reset the state of this layout node and all of its children.
*/
public reset() {
this.children.forEach((child) => child.reset());
}
}
class LabelRenderer extends FormRenderer {
public render() {
return css.label(this.layoutNode.text ?? '');
}
}
class ParagraphRenderer extends FormRenderer {
public render() {
return css.paragraph(
css.paragraph.cls(`-alignment-${this.layoutNode.alignment || 'left'}`),
el => {
el.innerHTML = sanitizeHTML(marked(this.layoutNode.text || '**Lorem** _ipsum_ dolor'));
},
);
}
}
class SectionRenderer extends FormRenderer {
public render() {
return css.section(
this.children.map((child) => child.render()),
);
}
}
class ColumnsRenderer extends FormRenderer {
public render() {
return css.columns(
{style: `--grist-columns-count: ${this._getColumnsCount()}`},
this.children.map((child) => child.render()),
);
}
private _getColumnsCount() {
return this.children.length || 1;
}
}
class SubmitRenderer extends FormRenderer {
public render() {
return [
css.error(dom.text(use => use(this.context.error) ?? '')),
css.submitButtons(
css.resetButton(
'Reset',
dom.boolAttr('disabled', this.context.disabled),
{type: 'button'},
dom.on('click', () => {
return confirmModal(
'Are you sure you want to reset your form?',
'Reset',
() => this.parent?.reset()
);
}),
testId('reset'),
),
css.submitButton(
dom('input',
dom.boolAttr('disabled', this.context.disabled),
{
type: 'submit',
value: this.context.rootLayoutNode.submitText || 'Submit',
},
dom.on('click', () => validateRequiredLists()),
)
),
),
];
}
}
class PlaceholderRenderer extends FormRenderer {
public render() {
return dom('div');
}
}
class LayoutRenderer extends FormRenderer {
public render() {
return this.children.map((child) => child.render());
}
}
class FieldRenderer extends FormRenderer {
public renderer: BaseFieldRenderer;
public constructor(layoutNode: FormLayoutNode, context: FormRendererContext) {
super(layoutNode, context);
const field = this.layoutNode.leaf ? this.context.fields[this.layoutNode.leaf] : null;
if (!field) { throw new Error(); }
const Renderer = FieldRenderers[field.type as keyof typeof FieldRenderers] ?? TextRenderer;
this.renderer = this.autoDispose(new Renderer(field, context));
}
public render() {
return this.renderer.render();
}
public reset() {
this.renderer.resetInput();
}
}
abstract class BaseFieldRenderer extends Disposable {
public constructor(protected field: FormField, protected context: FormRendererContext) {
super();
}
public render() {
return css.field(
this.label(),
dom('div', this.input()),
);
}
public name() {
return this.field.colId;
}
public label() {
return dom('label',
css.label.cls(''),
css.label.cls('-required', Boolean(this.field.options.formRequired)),
{for: this.name()},
this.field.question,
);
}
public abstract input(): DomContents;
public abstract resetInput(): void;
}
class TextRenderer extends BaseFieldRenderer {
protected inputType = 'text';
private _format = this.field.options.formTextFormat ?? 'singleline';
private _lineCount = String(this.field.options.formTextLineCount || 3);
private _value = Observable.create<string>(this, '');
public input() {
if (this._format === 'singleline') {
return this._renderSingleLineInput();
} else {
return this._renderMultiLineInput();
}
}
public resetInput(): void {
this._value.setAndTrigger('');
}
private _renderSingleLineInput() {
return css.textInput(
{
type: this.inputType,
name: this.name(),
required: this.field.options.formRequired,
},
dom.prop('value', this._value),
preventSubmitOnEnter(),
);
}
private _renderMultiLineInput() {
return css.textarea(
{
name: this.name(),
required: this.field.options.formRequired,
rows: this._lineCount,
},
dom.prop('value', this._value),
dom.on('input', (_e, elem) => this._value.set(elem.value)),
);
}
}
class NumericRenderer extends BaseFieldRenderer {
protected inputType = 'text';
private _format = this.field.options.formNumberFormat ?? 'text';
private _value = Observable.create<string>(this, '');
private _spinnerValue = Observable.create<number|''>(this, '');
public input() {
if (this._format === 'text') {
return this._renderTextInput();
} else {
return this._renderSpinnerInput();
}
}
public resetInput(): void {
this._value.setAndTrigger('');
this._spinnerValue.setAndTrigger('');
}
private _renderTextInput() {
return css.textInput(
{
type: this.inputType,
name: this.name(),
required: this.field.options.formRequired,
},
dom.prop('value', this._value),
preventSubmitOnEnter(),
);
}
private _renderSpinnerInput() {
return css.spinner(
this._spinnerValue,
{
setValueOnInput: true,
inputArgs: [
{
name: this.name(),
required: this.field.options.formRequired,
},
preventSubmitOnEnter(),
],
}
);
}
}
class DateRenderer extends TextRenderer {
protected inputType = 'date';
}
class DateTimeRenderer extends TextRenderer {
protected inputType = 'datetime-local';
}
export const SELECT_PLACEHOLDER = 'Select...';
class ChoiceRenderer extends BaseFieldRenderer {
protected value: Observable<string>;
private _choices: string[];
private _selectElement: HTMLElement;
private _ctl?: PopupControl<IPopupOptions>;
private _format = this.field.options.formSelectFormat ?? 'select';
private _alignment = this.field.options.formOptionsAlignment ?? 'vertical';
private _radioButtons: MutableObsArray<{
label: string;
checked: Observable<string|null>
}> = this.autoDispose(obsArray());
public constructor(field: FormField, context: FormRendererContext) {
super(field, context);
const choices = this.field.options.choices;
if (!Array.isArray(choices) || choices.some((choice) => typeof choice !== 'string')) {
this._choices = [];
} else {
const sortOrder = this.field.options.formOptionsSortOrder ?? 'default';
if (sortOrder !== 'default') {
choices.sort((a, b) => String(a).localeCompare(String(b)));
if (sortOrder === 'descending') {
choices.reverse();
}
}
// Support for 1000 choices. TODO: make limit dynamic.
this._choices = choices.slice(0, 1000);
}
this.value = Observable.create<string>(this, '');
this._radioButtons.set(this._choices.map(choice => ({
label: String(choice),
checked: Observable.create(this, null),
})));
}
public input() {
if (this._format === 'select') {
return this._renderSelectInput();
} else {
return this._renderRadioInput();
}
}
public resetInput() {
this.value.set('');
this._radioButtons.get().forEach(radioButton => {
radioButton.checked.set(null);
});
}
private _renderSelectInput() {
return css.hybridSelect(
this._selectElement = css.select(
{name: this.name(), required: this.field.options.formRequired},
dom.on('input', (_e, elem) => this.value.set(elem.value)),
dom('option', {value: ''}, SELECT_PLACEHOLDER),
this._choices.map((choice) => dom('option',
{value: choice},
dom.prop('selected', use => use(this.value) === choice),
choice
)),
dom.onKeyDown({
Enter$: (ev) => this._maybeOpenSearchSelect(ev),
' $': (ev) => this._maybeOpenSearchSelect(ev),
ArrowUp$: (ev) => this._maybeOpenSearchSelect(ev),
ArrowDown$: (ev) => this._maybeOpenSearchSelect(ev),
Backspace$: () => this.value.set(''),
}),
preventSubmitOnEnter(),
),
dom.maybe(use => !use(isXSmallScreenObs()), () =>
css.searchSelect(
dom('div', dom.text(use => use(this.value) || SELECT_PLACEHOLDER)),
dropdownWithSearch<string>({
action: (value) => this.value.set(value),
options: () => [
{label: SELECT_PLACEHOLDER, value: '', placeholder: true},
...this._choices.map((choice) => ({
label: choice,
value: choice,
}),
)],
onClose: () => { setTimeout(() => this._selectElement.focus()); },
placeholder: 'Search',
acOptions: {maxResults: 1000, keepOrder: true, showEmptyItems: true},
popupOptions: {
trigger: [
'click',
(_el, ctl) => { this._ctl = ctl; },
],
},
matchTriggerElemWidth: true,
}),
css.searchSelectIcon('Collapse'),
testId('search-select'),
),
),
);
}
private _renderRadioInput() {
const required = this.field.options.formRequired;
return css.radioList(
css.radioList.cls('-horizontal', this._alignment === 'horizontal'),
dom.cls('grist-radio-list'),
dom.cls('required', Boolean(required)),
{name: this.name(), required},
dom.forEach(this._radioButtons, (radioButton) =>
css.radio(
dom('input',
dom.prop('checked', radioButton.checked),
dom.on('change', (_e, elem) => radioButton.checked.set(elem.value)),
{
type: 'radio',
name: `${this.name()}`,
value: radioButton.label,
},
preventSubmitOnEnter(),
),
dom('span', radioButton.label),
)
),
);
}
private _maybeOpenSearchSelect(ev: KeyboardEvent) {
if (isXSmallScreenObs().get()) {
return;
}
ev.preventDefault();
ev.stopPropagation();
this._ctl?.open();
}
}
class BoolRenderer extends BaseFieldRenderer {
protected inputType = 'checkbox';
protected checked = Observable.create<boolean>(this, false);
private _format = this.field.options.formToggleFormat ?? 'switch';
public render() {
return css.field(
dom('div', this.input()),
);
}
public input() {
if (this._format === 'switch') {
return this._renderSwitchInput();
} else {
return this._renderCheckboxInput();
}
}
public resetInput(): void {
this.checked.set(false);
}
private _renderSwitchInput() {
return css.toggleSwitch(
dom('input',
dom.prop('checked', this.checked),
dom.prop('value', use => use(this.checked) ? '1' : '0'),
dom.on('change', (_e, elem) => this.checked.set(elem.checked)),
{
type: this.inputType,
name: this.name(),
required: this.field.options.formRequired,
},
preventSubmitOnEnter(),
),
css.gristSwitch(
css.gristSwitchSlider(),
css.gristSwitchCircle(),
),
css.toggleLabel(
css.label.cls('-required', Boolean(this.field.options.formRequired)),
this.field.question,
),
);
}
private _renderCheckboxInput() {
return css.toggle(
dom('input',
dom.prop('checked', this.checked),
dom.prop('value', use => use(this.checked) ? '1' : '0'),
dom.on('change', (_e, elem) => this.checked.set(elem.checked)),
{
type: this.inputType,
name: this.name(),
required: this.field.options.formRequired,
},
preventSubmitOnEnter(),
),
css.toggleLabel(
css.label.cls('-required', Boolean(this.field.options.formRequired)),
this.field.question,
),
);
}
}
class ChoiceListRenderer extends BaseFieldRenderer {
protected checkboxes: MutableObsArray<{
label: string;
checked: Observable<string|null>
}> = this.autoDispose(obsArray());
private _alignment = this.field.options.formOptionsAlignment ?? 'vertical';
public constructor(field: FormField, context: FormRendererContext) {
super(field, context);
let choices = this.field.options.choices;
if (!Array.isArray(choices) || choices.some((choice) => typeof choice !== 'string')) {
choices = [];
} else {
const sortOrder = this.field.options.formOptionsSortOrder ?? 'default';
if (sortOrder !== 'default') {
choices.sort((a, b) => String(a).localeCompare(String(b)));
if (sortOrder === 'descending') {
choices.reverse();
}
}
// Support for 30 choices. TODO: make limit dynamic.
choices = choices.slice(0, 30);
}
this.checkboxes.set(choices.map(choice => ({
label: choice,
checked: Observable.create(this, null),
})));
}
public input() {
const required = this.field.options.formRequired;
return css.checkboxList(
css.checkboxList.cls('-horizontal', this._alignment === 'horizontal'),
dom.cls('grist-checkbox-list'),
dom.cls('required', Boolean(required)),
{name: this.name(), required},
dom.forEach(this.checkboxes, (checkbox) =>
css.checkbox(
dom('input',
dom.prop('checked', checkbox.checked),
dom.on('change', (_e, elem) => checkbox.checked.set(elem.value)),
{
type: 'checkbox',
name: `${this.name()}[]`,
value: checkbox.label,
},
preventSubmitOnEnter(),
),
dom('span', checkbox.label),
)
),
);
}
public resetInput(): void {
this.checkboxes.get().forEach(checkbox => {
checkbox.checked.set(null);
});
}
}
class RefListRenderer extends BaseFieldRenderer {
protected checkboxes: MutableObsArray<{
label: string;
value: string;
checked: Observable<string|null>
}> = this.autoDispose(obsArray());
private _alignment = this.field.options.formOptionsAlignment ?? 'vertical';
public constructor(field: FormField, context: FormRendererContext) {
super(field, context);
const references = this.field.refValues ?? [];
const sortOrder = this.field.options.formOptionsSortOrder;
if (sortOrder !== 'default') {
// Sort by the second value, which is the display value.
references.sort((a, b) => String(a[1]).localeCompare(String(b[1])));
if (sortOrder === 'descending') {
references.reverse();
}
}
// Support for 30 choices. TODO: make limit dynamic.
references.splice(30);
this.checkboxes.set(references.map(reference => ({
label: String(reference[1]),
value: String(reference[0]),
checked: Observable.create(this, null),
})));
}
public input() {
const required = this.field.options.formRequired;
return css.checkboxList(
css.checkboxList.cls('-horizontal', this._alignment === 'horizontal'),
dom.cls('grist-checkbox-list'),
dom.cls('required', Boolean(required)),
{name: this.name(), required},
dom.forEach(this.checkboxes, (checkbox) =>
css.checkbox(
dom('input',
dom.prop('checked', checkbox.checked),
dom.on('change', (_e, elem) => checkbox.checked.set(elem.value)),
{
type: 'checkbox',
'data-grist-type': this.field.type,
name: `${this.name()}[]`,
value: checkbox.value,
},
preventSubmitOnEnter(),
),
dom('span', checkbox.label),
)
),
);
}
public resetInput(): void {
this.checkboxes.get().forEach(checkbox => {
checkbox.checked.set(null);
});
}
}
class RefRenderer extends BaseFieldRenderer {
protected value = Observable.create(this, '');
private _format = this.field.options.formSelectFormat ?? 'select';
private _alignment = this.field.options.formOptionsAlignment ?? 'vertical';
private _choices: [number|string, CellValue][];
private _selectElement: HTMLElement;
private _ctl?: PopupControl<IPopupOptions>;
private _radioButtons: MutableObsArray<{
label: string;
value: string;
checked: Observable<string|null>
}> = this.autoDispose(obsArray());
public constructor(field: FormField, context: FormRendererContext) {
super(field, context);
const choices: [number|string, CellValue][] = this.field.refValues ?? [];
const sortOrder = this.field.options.formOptionsSortOrder ?? 'default';
if (sortOrder !== 'default') {
// Sort by the second value, which is the display value.
choices.sort((a, b) => String(a[1]).localeCompare(String(b[1])));
if (sortOrder === 'descending') {
choices.reverse();
}
}
// Support for 1000 choices. TODO: make limit dynamic.
this._choices = choices.slice(0, 1000);
this.value = Observable.create<string>(this, '');
this._radioButtons.set(this._choices.map(reference => ({
label: String(reference[1]),
value: String(reference[0]),
checked: Observable.create(this, null),
})));
}
public input() {
if (this._format === 'select') {
return this._renderSelectInput();
} else {
return this._renderRadioInput();
}
}
public resetInput(): void {
this.value.set('');
this._radioButtons.get().forEach(radioButton => {
radioButton.checked.set(null);
});
}
private _renderSelectInput() {
return css.hybridSelect(
this._selectElement = css.select(
{
name: this.name(),
'data-grist-type': this.field.type,
required: this.field.options.formRequired,
},
dom.on('input', (_e, elem) => this.value.set(elem.value)),
dom('option',
{value: ''},
SELECT_PLACEHOLDER,
dom.prop('selected', use => use(this.value) === ''),
),
this._choices.map((choice) => dom('option',
{value: String(choice[0])},
String(choice[1]),
dom.prop('selected', use => use(this.value) === String(choice[0])),
)),
dom.onKeyDown({
Enter$: (ev) => this._maybeOpenSearchSelect(ev),
' $': (ev) => this._maybeOpenSearchSelect(ev),
ArrowUp$: (ev) => this._maybeOpenSearchSelect(ev),
ArrowDown$: (ev) => this._maybeOpenSearchSelect(ev),
Backspace$: () => this.value.set(''),
}),
preventSubmitOnEnter(),
),
dom.maybe(use => !use(isXSmallScreenObs()), () =>
css.searchSelect(
dom('div', dom.text(use => {
const choice = this._choices.find((c) => String(c[0]) === use(this.value));
return String(choice?.[1] || SELECT_PLACEHOLDER);
})),
dropdownWithSearch<string>({
action: (value) => this.value.set(value),
options: () => [
{label: SELECT_PLACEHOLDER, value: '', placeholder: true},
...this._choices.map((choice) => ({
label: String(choice[1]),
value: String(choice[0]),
}),
)],
onClose: () => { setTimeout(() => this._selectElement.focus()); },
acOptions: {maxResults: 1000, keepOrder: true, showEmptyItems: true},
placeholder: 'Search',
popupOptions: {
trigger: [
'click',
(_el, ctl) => { this._ctl = ctl; },
],
},
matchTriggerElemWidth: true,
}),
css.searchSelectIcon('Collapse'),
testId('search-select'),
),
)
);
}
private _renderRadioInput() {
const required = this.field.options.formRequired;
return css.radioList(
css.radioList.cls('-horizontal', this._alignment === 'horizontal'),
dom.cls('grist-radio-list'),
dom.cls('required', Boolean(required)),
{name: this.name(), required, 'data-grist-type': this.field.type},
dom.forEach(this._radioButtons, (radioButton) =>
css.radio(
dom('input',
dom.prop('checked', radioButton.checked),
dom.on('change', (_e, elem) => radioButton.checked.set(elem.value)),
{
type: 'radio',
name: `${this.name()}`,
value: radioButton.value,
},
preventSubmitOnEnter(),
),
dom('span', radioButton.label),
)
),
);
}
private _maybeOpenSearchSelect(ev: KeyboardEvent) {
if (isXSmallScreenObs().get()) {
return;
}
ev.preventDefault();
ev.stopPropagation();
this._ctl?.open();
}
}
const FieldRenderers = {
'Text': TextRenderer,
'Numeric': NumericRenderer,
'Int': NumericRenderer,
'Choice': ChoiceRenderer,
'Bool': BoolRenderer,
'ChoiceList': ChoiceListRenderer,
'Date': DateRenderer,
'DateTime': DateTimeRenderer,
'Ref': RefRenderer,
'RefList': RefListRenderer,
};
const FormRenderers = {
'Paragraph': ParagraphRenderer,
'Section': SectionRenderer,
'Columns': ColumnsRenderer,
'Submit': SubmitRenderer,
'Placeholder': PlaceholderRenderer,
'Layout': LayoutRenderer,
'Field': FieldRenderer,
'Label': LabelRenderer,
// Aliases for Paragraph.
'Separator': ParagraphRenderer,
'Header': ParagraphRenderer,
};
function preventSubmitOnEnter() {
return dom.onKeyDown({Enter$: (ev) => ev.preventDefault()});
}
/**
* Validates the required attribute of checkbox and radio lists, such as those
* used by Choice, Choice List, Reference, and Reference List fields.
*
* Since lists of checkboxes and radios don't natively support a required attribute, we
* simulate it by marking the first checkbox/radio of each required list as being a
* required input. Then, we make another pass and unmark all required checkbox/radio
* inputs if they belong to a list where at least one checkbox/radio is checked. If any
* inputs in a required are left as required, HTML validations that are triggered when
* submitting a form will catch them and prevent the submission.
*/
function validateRequiredLists() {
for (const type of ['checkbox', 'radio']) {
const requiredLists = document
.querySelectorAll(`.grist-${type}-list.required:not(:has(input:checked))`);
Array.from(requiredLists).forEach(function(list) {
const firstOption = list.querySelector(`input[type="${type}"]`);
firstOption?.setAttribute('required', 'required');
});
const requiredListsWithCheckedOption = document
.querySelectorAll(`.grist-${type}-list.required:has(input:checked`);
Array.from(requiredListsWithCheckedOption).forEach(function(list) {
const firstOption = list.querySelector(`input[type="${type}"]`);
firstOption?.removeAttribute('required');
});
}
}