// CodeMirror, copyright (c) by Marijn Haverbeke and others

// Distributed under an MIT license: https://codemirror.net/LICENSE



// Defines jumpToLine command. Uses dialog.js if present.



(function(mod) {

  if (typeof exports == "object" && typeof module == "object") // CommonJS

    mod(require("../../lib/codemirror"), require("../dialog/dialog"));

  else if (typeof define == "function" && define.amd) // AMD

    define(["../../lib/codemirror", "../dialog/dialog"], mod);

  else // Plain browser env

    mod(CodeMirror);

})(function(CodeMirror) {

  "use strict";



  function dialog(cm, text, shortText, deflt, f) {

    if (cm.openDialog) cm.openDialog(text, f, {value: deflt, selectValueOnOpen: true});

    else f(prompt(shortText, deflt));

  }



  function getJumpDialog(cm) {

    return cm.phrase("Jump to line:") + ' <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">' + cm.phrase("(Use line:column or scroll% syntax)") + '</span>';

  }



  function interpretLine(cm, string) {

    var num = Number(string)

    if (/^[-+]/.test(string)) return cm.getCursor().line + num

    else return num - 1

  }



  CodeMirror.commands.jumpToLine = function(cm) {

    var cur = cm.getCursor();

    dialog(cm, getJumpDialog(cm), cm.phrase("Jump to line:"), (cur.line + 1) + ":" + cur.ch, function(posStr) {

      if (!posStr) return;



      var match;

      if (match = /^\s*([\+\-]?\d+)\s*\:\s*(\d+)\s*$/.exec(posStr)) {

        cm.setCursor(interpretLine(cm, match[1]), Number(match[2]))

      } else if (match = /^\s*([\+\-]?\d+(\.\d+)?)\%\s*/.exec(posStr)) {

        var line = Math.round(cm.lineCount() * Number(match[1]) / 100);

        if (/^[-+]/.test(match[1])) line = cur.line + line + 1;

        cm.setCursor(line - 1, cur.ch);

      } else if (match = /^\s*\:?\s*([\+\-]?\d+)\s*/.exec(posStr)) {

        cm.setCursor(interpretLine(cm, match[1]), cur.ch);

      }

    });

  };



  CodeMirror.keyMap["default"]["Alt-G"] = "jumpToLine";

});

