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20 lines
604 B
TypeScript
20 lines
604 B
TypeScript
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// Helper functions to sync up scrolling
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export default function useScrollUtils(CodeMirror: any) {
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function getScrollHeight(cm: any) {
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const info = cm.getScrollInfo();
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const overdraw = cm.state.scrollPastEndPadding ? cm.state.scrollPastEndPadding : '0px';
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return info.height - info.clientHeight - parseInt(overdraw);
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}
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CodeMirror.defineExtension('getScrollPercent', function() {
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const info = this.getScrollInfo();
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return info.top / getScrollHeight(this);
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});
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CodeMirror.defineExtension('setScrollPercent', function(p: number) {
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this.scrollTo(null, p * getScrollHeight(this));
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});
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}
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