@blueprintjs/core
Version:
Core styles & components
154 lines • 6.5 kB
JavaScript
/*
* Copyright 2015 Palantir Technologies, Inc. All rights reserved.
*
* Licensed under the terms of the LICENSE file distributed with this project.
*/
import classNames from "classnames";
import * as React from "react";
import { AbstractPureComponent } from "../../common/abstractPureComponent";
import * as Classes from "../../common/classes";
import { DISPLAYNAME_PREFIX } from "../../common/props";
/**
* `Collapse` can be in one of six states, enumerated here.
* When changing the `isOpen` prop, the following happens to the states:
* isOpen={true} : CLOSED -> OPEN_START -> OPENING -> OPEN
* isOpen={false} : OPEN -> CLOSING_START -> CLOSING -> CLOSED
*/
export var AnimationStates;
(function (AnimationStates) {
/**
* The body is re-rendered, height is set to the measured body height and
* the body Y is set to 0.
*/
AnimationStates[AnimationStates["OPEN_START"] = 0] = "OPEN_START";
/**
* Animation begins, height is set to auto. This is all animated, and on
* complete, the state changes to OPEN.
*/
AnimationStates[AnimationStates["OPENING"] = 1] = "OPENING";
/**
* The collapse height is set to auto, and the body Y is set to 0 (so the
* element can be seen as normal).
*/
AnimationStates[AnimationStates["OPEN"] = 2] = "OPEN";
/**
* Height has been changed from auto to the measured height of the body to
* prepare for the closing animation in CLOSING.
*/
AnimationStates[AnimationStates["CLOSING_START"] = 3] = "CLOSING_START";
/**
* Height is set to 0 and the body Y is at -height. Both of these properties
* are transformed, and then after the animation is complete, the state
* changes to CLOSED.
*/
AnimationStates[AnimationStates["CLOSING"] = 4] = "CLOSING";
/**
* The contents of the collapse is not rendered, the collapse height is 0,
* and the body Y is at -height (so that the bottom of the body is at Y=0).
*/
AnimationStates[AnimationStates["CLOSED"] = 5] = "CLOSED";
})(AnimationStates || (AnimationStates = {}));
export class Collapse extends AbstractPureComponent {
constructor() {
super(...arguments);
this.state = {
animationState: this.props.isOpen ? AnimationStates.OPEN : AnimationStates.CLOSED,
height: "0px",
};
// The most recent non-0 height (once a height has been measured - is 0 until then)
this.height = 0;
this.contentsRefHandler = (el) => {
this.contents = el;
if (el != null) {
this.height = this.contents.clientHeight;
this.setState({
animationState: this.props.isOpen ? AnimationStates.OPEN : AnimationStates.CLOSED,
height: `${this.height}px`,
});
}
};
}
componentWillReceiveProps(nextProps) {
if (this.props.isOpen !== nextProps.isOpen) {
this.clearTimeouts();
if (this.state.animationState !== AnimationStates.CLOSED && !nextProps.isOpen) {
this.setState({
animationState: AnimationStates.CLOSING_START,
height: `${this.height}px`,
});
}
else if (this.state.animationState !== AnimationStates.OPEN && nextProps.isOpen) {
this.setState({
animationState: AnimationStates.OPEN_START,
});
}
}
}
render() {
const isContentVisible = this.state.animationState !== AnimationStates.CLOSED;
const shouldRenderChildren = isContentVisible || this.props.keepChildrenMounted;
const displayWithTransform = isContentVisible && this.state.animationState !== AnimationStates.CLOSING;
const isAutoHeight = this.state.height === "auto";
const containerStyle = {
height: isContentVisible ? this.state.height : undefined,
overflowY: (isAutoHeight ? "visible" : undefined),
transition: isAutoHeight ? "none" : undefined,
};
const contentsStyle = {
transform: displayWithTransform ? "translateY(0)" : `translateY(-${this.height}px)`,
transition: isAutoHeight ? "none" : undefined,
};
return React.createElement(this.props.component, {
className: classNames(Classes.COLLAPSE, this.props.className),
style: containerStyle,
}, React.createElement("div", { className: Classes.COLLAPSE_BODY, ref: this.contentsRefHandler, style: contentsStyle, "aria-hidden": !isContentVisible && this.props.keepChildrenMounted }, shouldRenderChildren ? this.props.children : null));
}
componentDidMount() {
this.forceUpdate();
if (this.props.isOpen) {
this.setState({ animationState: AnimationStates.OPEN, height: "auto" });
}
else {
this.setState({ animationState: AnimationStates.CLOSED });
}
}
componentDidUpdate() {
if (this.contents != null && this.contents.clientHeight !== 0) {
this.height = this.contents.clientHeight;
}
if (this.state.animationState === AnimationStates.CLOSING_START) {
this.setTimeout(() => this.setState({
animationState: AnimationStates.CLOSING,
height: "0px",
}));
this.setTimeout(() => this.onDelayedStateChange(), this.props.transitionDuration);
}
if (this.state.animationState === AnimationStates.OPEN_START) {
this.setState({
animationState: AnimationStates.OPENING,
height: this.height + "px",
});
this.setTimeout(() => this.onDelayedStateChange(), this.props.transitionDuration);
}
}
onDelayedStateChange() {
switch (this.state.animationState) {
case AnimationStates.OPENING:
this.setState({ animationState: AnimationStates.OPEN, height: "auto" });
break;
case AnimationStates.CLOSING:
this.setState({ animationState: AnimationStates.CLOSED });
break;
default:
break;
}
}
}
Collapse.displayName = `${DISPLAYNAME_PREFIX}.Collapse`;
Collapse.defaultProps = {
component: "div",
isOpen: false,
keepChildrenMounted: false,
transitionDuration: 200,
};
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