yhtml5-test/demo/node_modules/react-error-overlay/lib/containers/StackFrameCodeBlock.js

A test framework for front-end projects

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import React from 'react';
import CodeBlock from '../components/CodeBlock';
import { applyStyles } from '../utils/dom/css';
import { absolutifyCaret } from '../utils/dom/absolutifyCaret';

import { primaryErrorStyle, secondaryErrorStyle } from '../styles';
import generateAnsiHTML from '../utils/generateAnsiHTML';

import codeFrame from 'babel-code-frame';

// Exact type workaround for spread operator.
// See: https://github.com/facebook/flow/issues/2405


function StackFrameCodeBlock(props) {
  var lines = props.lines,
      lineNum = props.lineNum,
      columnNum = props.columnNum,
      contextSize = props.contextSize,
      main = props.main;

  var sourceCode = [];
  var whiteSpace = Infinity;
  lines.forEach(function (e) {
    var text = e.content;

    var m = text.match(/^\s*/);
    if (text === '') {
      return;
    }
    if (m && m[0]) {
      whiteSpace = Math.min(whiteSpace, m[0].length);
    } else {
      whiteSpace = 0;
    }
  });
  lines.forEach(function (e) {
    var text = e.content;
    var line = e.lineNumber;


    if (isFinite(whiteSpace)) {
      text = text.substring(whiteSpace);
    }
    sourceCode[line - 1] = text;
  });
  var ansiHighlight = codeFrame(sourceCode.join('\n'), lineNum, columnNum == null ? 0 : columnNum - (isFinite(whiteSpace) ? whiteSpace : 0), {
    forceColor: true,
    linesAbove: contextSize,
    linesBelow: contextSize
  });
  var htmlHighlight = generateAnsiHTML(ansiHighlight);
  var code = document.createElement('code');
  code.innerHTML = htmlHighlight;
  absolutifyCaret(code);

  var ccn = code.childNodes;
  // eslint-disable-next-line
  oLoop: for (var index = 0; index < ccn.length; ++index) {
    var node = ccn[index];
    var ccn2 = node.childNodes;
    for (var index2 = 0; index2 < ccn2.length; ++index2) {
      var lineNode = ccn2[index2];
      var text = lineNode.innerText;
      if (text == null) {
        continue;
      }
      if (text.indexOf(' ' + lineNum + ' |') === -1) {
        continue;
      }
      // $FlowFixMe
      applyStyles(node, main ? primaryErrorStyle : secondaryErrorStyle);
      // eslint-disable-next-line
      break oLoop;
    }
  }

  return React.createElement(CodeBlock, { main: main, codeHTML: code.innerHTML });
}

export default StackFrameCodeBlock;