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// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import m from 'mithril';
import {classNames} from '../classnames';
import {Icon} from './icon';
import {Popup, PopupPosition} from './popup';
import {hasChildren} from './utils';
export interface MenuItemAttrs {
// Text to display on the menu button.
label: string;
// Optional left icon.
icon?: string;
// Optional right icon.
rightIcon?: string;
// Make the item appear greyed out block any interaction with it. No events
// will be fired.
// Defaults to false.
disabled?: boolean;
// Always show the button as if the "active" pseudo class were applied, which
// makes the button look permanently pressed.
// Useful for when the button represents some toggleable state, such as
// showing/hiding a popup menu.
// Defaults to false.
active?: boolean;
// If this menu item is a descendant of a popup, this setting means that
// clicking it will result in the popup being dismissed.
// Defaults to false when menuitem has children, true otherwise.
closePopupOnClick?: boolean;
// Remaining attributes forwarded to the underlying HTML element.
[htmlAttrs: string]: any;
}
// An interactive menu element with an icon.
// If this node has children, a nested popup menu will be rendered.
export class MenuItem implements m.ClassComponent<MenuItemAttrs> {
view(vnode: m.CVnode<MenuItemAttrs>): m.Children {
if (hasChildren(vnode)) {
return this.renderNested(vnode);
} else {
return this.renderSingle(vnode);
}
}
private renderNested({attrs, children}: m.CVnode<MenuItemAttrs>) {
const {rightIcon = 'chevron_right', closePopupOnClick = false, ...rest} =
attrs;
return m(
PopupMenu2,
{
popupPosition: PopupPosition.RightStart,
trigger: m(MenuItem, {
rightIcon: rightIcon ?? 'chevron_right',
closePopupOnClick,
...rest,
}),
showArrow: false,
createNewGroup: false,
},
children,
);
}
private renderSingle({attrs}: m.CVnode<MenuItemAttrs>) {
const {
label,
icon,
rightIcon,
disabled,
active,
closePopupOnClick = true,
...htmlAttrs
} = attrs;
const classes = classNames(
active && 'pf-active',
!disabled && closePopupOnClick && Popup.DISMISS_POPUP_GROUP_CLASS,
);
return m(
'button.pf-menu-item' + (disabled ? '[disabled]' : ''),
{class: classes, ...htmlAttrs},
icon && m(Icon, {className: 'pf-left-icon', icon}),
rightIcon && m(Icon, {className: 'pf-right-icon', icon: rightIcon}),
label,
);
}
};
// An element which shows a dividing line between menu items.
export class MenuDivider implements m.ClassComponent {
view() {
return m('.pf-menu-divider');
}
};
// A siple container for a menu.
// The menu contents are passed in as children, and are typically MenuItems or
// MenuDividers, but really they can be any Mithril component.
export class Menu implements m.ClassComponent {
view({children}: m.CVnode) {
return m('.pf-menu', children);
}
};
interface PopupMenu2Attrs {
// The trigger is mithril component which is used to toggle the popup when
// clicked, and provides the anchor on the page which the popup shall hover
// next to, and to which the popup's arrow shall point. The popup shall move
// around the page with this component, as if attached to it.
// This trigger can be any mithril component, but it is typically a Button,
// an Icon, or some other interactive component.
// Beware this element will have its `onclick`, `ref`, and `active` attributes
// overwritten.
trigger: m.Vnode<any, any>;
// Which side of the trigger to place to popup.
// Defaults to "bottom".
popupPosition?: PopupPosition;
// Whether we should show the little arrow pointing to the trigger.
// Defaults to true.
showArrow?: boolean;
// Whether this popup should form a new popup group.
// When nesting popups, grouping controls how popups are closed.
// When closing popups via the Escape key, each group is closed one by one,
// starting at the topmost group in the stack.
// When using a magic button to close groups (see DISMISS_POPUP_GROUP_CLASS),
// only the group in which the button lives and it's children will be closed.
// Defaults to true.
createNewGroup?: boolean;
}
// A combination of a Popup and a Menu component.
// The menu contents are passed in as children, and are typically MenuItems or
// MenuDividers, but really they can be any Mithril component.
export class PopupMenu2 implements m.ClassComponent<PopupMenu2Attrs> {
view({attrs, children}: m.CVnode<PopupMenu2Attrs>) {
const {trigger, popupPosition = PopupPosition.Bottom, ...popupAttrs} =
attrs;
return m(
Popup,
{
trigger,
position: popupPosition,
...popupAttrs,
},
m(Menu, children));
}
};
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