1  const fs = require('fs-plus');
 2  
 3  // Converts a query string parameter for a line or column number
 4  // to a zero-based line or column number for the Atom API.
 5  function getLineColNumber(numStr) {
 6    const num = parseInt(numStr || 0, 10);
 7    return Math.max(num - 1, 0);
 8  }
 9  
10  function openFile(atom, { query }) {
11    const { filename, line, column } = query;
12  
13    atom.workspace.open(filename, {
14      initialLine: getLineColNumber(line),
15      initialColumn: getLineColNumber(column),
16      searchAllPanes: true
17    });
18  }
19  
20  function windowShouldOpenFile({ query }) {
21    const { filename } = query;
22    const stat = fs.statSyncNoException(filename);
23  
24    return win =>
25      win.containsLocation({
26        pathToOpen: filename,
27        exists: Boolean(stat),
28        isFile: stat.isFile(),
29        isDirectory: stat.isDirectory()
30      });
31  }
32  
33  const ROUTER = {
34    '/open/file': { handler: openFile, getWindowPredicate: windowShouldOpenFile }
35  };
36  
37  module.exports = {
38    create(atomEnv) {
39      return function coreURIHandler(parsed) {
40        const config = ROUTER[parsed.pathname];
41        if (config) {
42          config.handler(atomEnv, parsed);
43        }
44      };
45    },
46  
47    windowPredicate(parsed) {
48      const config = ROUTER[parsed.pathname];
49      if (config && config.getWindowPredicate) {
50        return config.getWindowPredicate(parsed);
51      } else {
52        return () => true;
53      }
54    }
55  };