react-markdown-editor-lite
Version:
a light-weight Markdown editor based on React
63 lines (62 loc) • 2.08 kB
JavaScript
import react from "react";
import { PluginComponent } from "./Plugin.mjs";
class AutoResize extends PluginComponent {
static pluginName = 'auto-resize';
static align = 'left';
static defaultConfig = {
min: 200,
max: 1 / 0,
useTimer: false
};
timer = null;
useTimer;
constructor(props){
super(props);
this.useTimer = this.getConfig('useTimer') || "u" < typeof requestAnimationFrame;
this.handleChange = this.handleChange.bind(this);
this.doResize = this.doResize.bind(this);
}
doResize() {
const resizeElement = (e)=>{
e.style.height = 'auto';
const height = Math.min(Math.max(this.getConfig('min'), e.scrollHeight), this.getConfig('max'));
e.style.height = `${height}px`;
return height;
};
this.timer = null;
const view = this.editor.getView();
const el = this.editor.getMdElement();
const previewer = this.editor.getHtmlElement();
if (el && view.md) {
const height = resizeElement(el);
if (previewer) previewer.style.height = `${height}px`;
return;
}
if (previewer && view.html) resizeElement(previewer);
}
handleChange() {
if (null !== this.timer) return;
if (this.useTimer) {
this.timer = window.setTimeout(this.doResize);
return;
}
this.timer = requestAnimationFrame(this.doResize);
}
componentDidMount() {
this.editor.on('change', this.handleChange);
this.editor.on('viewchange', this.handleChange);
this.handleChange();
}
componentWillUnmount() {
this.editor.off('change', this.handleChange);
this.editor.off('viewchange', this.handleChange);
if (null !== this.timer && this.useTimer) {
window.clearTimeout(this.timer);
this.timer = null;
}
}
render() {
return /*#__PURE__*/ react.createElement("span", null);
}
}
export { AutoResize as default };