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/*
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 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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import * as CodeMirror from "codemirror";
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/*
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Find pos {line:line, ch:ch} of first line that contains the
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string s, or returns undefined if no single line contains s.
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Should be much faster than calling getLine or getValue.
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*/
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CodeMirror.defineExtension("find_in_line", function (
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  s: string
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): CodeMirror.Position | undefined {
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  // @ts-ignore
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  const cm: any = this;
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  let line: number = -1;
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  let ch: number = 0;
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  let i = 0;
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  cm.eachLine(function (z) {
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    ch = z.text.indexOf(s);
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    if (ch !== -1) {
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      line = i;
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      return true; // undocumented - calling false stops iteration
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    }
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    i += 1;
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    return false;
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  });
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  if (line >= 0) {
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    return { line, ch };
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  }
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});
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