@blueprintjs/core
Version:
Core styles & components
80 lines • 4.1 kB
JavaScript
/*
* Copyright 2021 Palantir Technologies, Inc. All rights reserved.
*
* 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 classNames from "classnames";
import * as React from "react";
import { CSSTransition, TransitionGroup } from "react-transition-group";
import { Classes, DISPLAYNAME_PREFIX } from "../../common";
import { PanelView2 } from "./panelView2";
/**
* Panel stack (v2) component.
*
* @see https://blueprintjs.com/docs/#core/components/panel-stack2
* @template T type union of all possible panels in this stack
*/
// eslint-disable-next-line @typescript-eslint/ban-types
export const PanelStack2 = (props) => {
const { renderActivePanelOnly = true, showPanelHeader = true, stack: propsStack } = props;
const [direction, setDirection] = React.useState("push");
const [localStack, setLocalStack] = React.useState(props.initialPanel !== undefined ? [props.initialPanel] : []);
const stack = React.useMemo(() => (propsStack != null ? propsStack.slice().reverse() : localStack), [localStack, propsStack]);
const stackLength = React.useRef(stack.length);
React.useEffect(() => {
if (stack.length !== stackLength.current) {
// Adjust the direction in case the stack size has changed, controlled or uncontrolled
setDirection(stack.length - stackLength.current < 0 ? "pop" : "push");
}
stackLength.current = stack.length;
}, [stack]);
const handlePanelOpen = React.useCallback((panel) => {
props.onOpen?.(panel);
if (props.stack == null) {
setLocalStack(prevStack => [panel, ...prevStack]);
}
}, [props.onOpen]);
const handlePanelClose = React.useCallback((panel) => {
// only remove this panel if it is at the top and not the only one.
if (stack[0] !== panel || stack.length <= 1) {
return;
}
props.onClose?.(panel);
if (props.stack == null) {
setLocalStack(prevStack => prevStack.slice(1));
}
}, [stack, props.onClose]);
// early return, after all hooks are called
if (stack.length === 0) {
return null;
}
const panelsToRender = renderActivePanelOnly ? [stack[0]] : stack;
const panels = panelsToRender
.map((panel, index) => {
// With renderActivePanelOnly={false} we would keep all the CSSTransitions rendered,
// therefore they would not trigger the "enter" transition event as they were entered.
// To force the enter event, we want to change the key, but stack.length is not enough
// and a single panel should not rerender as long as it's hidden.
// This key contains two parts: first one, stack.length - index is constant (and unique) for each panel,
// second one, active changes only when the panel becomes or stops being active.
const layer = stack.length - index;
const key = renderActivePanelOnly ? stack.length : layer;
return (React.createElement(CSSTransition, { classNames: Classes.PANEL_STACK2, key: key, timeout: 400 },
React.createElement(PanelView2, { onClose: handlePanelClose, onOpen: handlePanelOpen, panel: panel, previousPanel: stack[index + 1], showHeader: showPanelHeader })));
})
.reverse();
const classes = classNames(Classes.PANEL_STACK2, `${Classes.PANEL_STACK2}-${direction}`, props.className);
return (React.createElement(TransitionGroup, { className: classes, component: "div" }, panels));
};
PanelStack2.displayName = `${DISPLAYNAME_PREFIX}.PanelStack2`;
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