script.js

var Typer = {
  text: null,
  accessCountimer: null,
  index: 0, // Current cursor position
  speed: 1, // Speed of the Typer
  file: "", // File, must be set
  accessCount: 0, // Times alt is pressed for Access Granted
  deniedCount: 0, // Times caps is pressed for Access Denied
  init() {
    // Initialize Automatic Typer
    this.accessCountimer = setInterval(function() {
      Typer.updLstChr();
    }, 500); // Initialize timer for blinking cursor
    $.get(Typer.file, function(data) {
      // Get the text file
      Typer.text = data; // Save the textfile in Typer.text
    });
  },

  content() {
    return $("#terminal").html(); // Get terminal content
  },

  write(str) {
    // Append to terminal content
    $("#terminal").append(str);
    return false;
  },

  addText(key) {
    // Main function to add the code
    var terminal = $("#terminal");
    if (Typer.text) {
      // Otherwise if text is loaded
      var cont = Typer.content(); // Get the terminal content
      if (cont.substring(cont.length - 1, cont.length) === "|") {
        // If the last char is the blinking cursor
        terminal.html(terminal.html().substring(0, cont.length - 1)); // Remove it before adding the text
      }
      if (key.key !== "Backspace") {
        // If key is not backspace
        Typer.index += Typer.speed; // Add to the index the speed
      } else {
        if (Typer.index > 0) {
          // Else if index is not less than 0
          Typer.index -= Typer.speed; // Remove speed for deleting text
        }
      }
      var text = $("<div/>")
        .text(Typer.text.substring(0, Typer.index))
        .html(); // Parse the text for stripping html entities
      var rtn = new RegExp("\n", "g"); // Newline regex
      var rts = new RegExp("\\s", "g"); // Whitespace regex
      var rtt = new RegExp("\\t", "g"); // Tab regex
      terminal.html(
        text
          .replace(rtn, "<br/>")
          .replace(rtt, "&nbsp;&nbsp;&nbsp;&nbsp;")
          .replace(rts, "&nbsp;")
      ); // Replace newline chars with br, tabs with 4 space and blanks with an html blank
      window.scrollBy(0, 50); // Scroll to make sure bottom is always visible
    }
    if (key.preventDefault && key.key !== "F11") {
      // Prevent F11(fullscreen) from being blocked
      key.preventDefault();
    }
    if (key.key !== "F11") {
      // Otherwise prevent keys default behavior
      key.returnValue = false;
    }
  },

  updLstChr() {
    // Blinking cursor
    var terminal = $("#terminal");
    var cont = this.content(); // Get terminal
    if (cont.substring(cont.length - 1, cont.length) === "|") {
      // If last char is the cursor
      // Remove it
      terminal.html(terminal.html().substring(0, cont.length - 1));
    } else {
      this.write("|"); // Else write it
    }
  }
};

$(function() {
  $(document).keydown(function(event) {
    Typer.addText(event); // Capture the keydown event and call the addText, this is executed on page load
  });
});