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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
"use strict";
const {
Component,
createFactory,
const Draggable = createFactory(
);
class GridElementWidthResizer extends Component {
static get propTypes() {
return {
getControlledElementNode: PropTypes.func.isRequired,
enabled: PropTypes.bool,
position: PropTypes.string.isRequired,
className: PropTypes.string,
onResizeEnd: PropTypes.func,
};
}
constructor(props) {
super(props);
this.onStartMove = this.onStartMove.bind(this);
this.onStopMove = this.onStopMove.bind(this);
this.onMove = this.onMove.bind(this);
this.state = {
dragging: false,
isRTLElement: false,
defaultCursor: null,
defaultWidth: null,
};
}
componentDidUpdate(prevProps) {
if (prevProps.enabled === true && this.props.enabled === false) {
this.onStopMove();
const controlledElementNode = this.props.getControlledElementNode();
controlledElementNode.style.width = this.state.defaultWidth;
}
}
// Dragging Events
/**
* Set 'resizing' cursor on entire document during splitter dragging.
* This avoids cursor-flickering that happens when the mouse leaves
* the splitter bar area (happens frequently).
*/
onStartMove() {
const controlledElementNode = this.props.getControlledElementNode();
if (!controlledElementNode) {
return;
}
const doc = controlledElementNode.ownerDocument;
const defaultCursor = doc.documentElement.style.cursor;
const defaultWidth = doc.documentElement.style.width;
doc.documentElement.style.cursor = "ew-resize";
doc.firstElementChild.classList.add("dragging");
this.setState({
dragging: true,
isRTLElement:
controlledElementNode.ownerDocument.defaultView.getComputedStyle(
controlledElementNode
).direction === "rtl",
defaultCursor,
defaultWidth,
});
}
onStopMove() {
const controlledElementNode = this.props.getControlledElementNode();
if (!this.state.dragging || !controlledElementNode) {
return;
}
const doc = controlledElementNode.ownerDocument;
doc.documentElement.style.cursor = this.state.defaultCursor;
doc.firstElementChild.classList.remove("dragging");
this.setState({
dragging: false,
});
if (this.props.onResizeEnd) {
const { width } = controlledElementNode.getBoundingClientRect();
this.props.onResizeEnd(width);
}
}
/**
* Adjust size of the controlled panel.
*/
onMove(x) {
const controlledElementNode = this.props.getControlledElementNode();
if (!this.state.dragging || !controlledElementNode) {
return;
}
const nodeBounds = controlledElementNode.getBoundingClientRect();
const { isRTLElement } = this.state;
const { position } = this.props;
const size =
(isRTLElement && position === "end") ||
(!isRTLElement && position === "start")
? nodeBounds.width + (nodeBounds.left - x)
: x - nodeBounds.left;
controlledElementNode.style.width = `${size}px`;
}
render() {
if (!this.props.enabled) {
return null;
}
const classNames = ["grid-element-width-resizer", this.props.position];
if (this.props.className) {
classNames.push(this.props.className);
}
return Draggable({
className: classNames.join(" "),
onStart: this.onStartMove,
onStop: this.onStopMove,
onMove: this.onMove,
});
}
}
module.exports = GridElementWidthResizer;