string-roulette/string-roulette.html at master · jbuttery/string-roulette · GitHub

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<!DOCTYPE html>
<html lang="en-us">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style type="text/css">
:root {
    --header-background-color: lightgray;
}
html, body                                           { margin: 0; padding: 0; }
html, body, div#body                                 { height: 100%; overflow: auto; }
div#header                                           { text-align: center; padding-top: 0.25em; padding-bottom: 2em; background-color: var(--header-background-color, lightgray); }
div#body                                             { padding-top: 3em; }
div#list_picker_container                            { text-align: center; }
span#list_picker button                              { margin: auto 0.25em; }
span#list_picker button.active                       { font-weight: bold; }
div#string_container, div#secondary_string_container { text-align: center; }
div#string_container                                 { padding-bottom: 3em; }
span#the_string                                      { font-size: 3em; font-weight: bold; }
span#secondary_string                                { font-style: italic; }
</style>
<title>String Roulette</title>
<script type="text/javascript">
var document_title = "String Roulette";
var lists = {"numbers":["0","1","2","3","4","5","6","7","8","9"]};
var list_name = "";
var list = "";
function update_string(list_name) {
    if ( ! list_name ) {
        // Get list name from URI query string
        // .../string-roulette.html?list=numbers
        var list_name = new URLSearchParams(window.location.search).get("list");
        // Get list name from URI fragment
        // .../string-roulette.html#numbers
        //var list_name = window.location.hash.slice(1);
    }
    if ( lists[list_name] ) {
        list = lists[list_name];
    } else {
        list_name = "numbers";
        list = lists["numbers"];
    }
    var list_selection = Math.floor(Math.random() * list.length);
    if ( typeof list[list_selection] === "string" ) {
        var new_string = list[list_selection];
    } else if ( typeof list[list_selection] === "object" ) {
        var new_string           = list[list_selection][0];
        var new_secondary_string = list[list_selection][1];
    } else {
        //alert("Unknown data type: " + typeof(list[list_selection]));
        console.error("Unknown data type: " + typeof(list[list_selection]));
        exit;
    }
    document.getElementsByTagName("title")[0].innerText = document_title + " (" + list_name + ")";
    document.getElementById("page_heading").innerText = document_title;
    document.getElementById("the_string").innerText = new_string;
    if ( typeof new_secondary_string === 'undefined' ) {
        document.getElementById("secondary_string").innerText = "";
    } else {
        document.getElementById("secondary_string").innerText = new_secondary_string;
    }
    // Rewrite div#body onMouseUp handler
    var body_element = document.getElementById("body")
    body_element.removeAttribute("onmouseup");
    body_element.setAttribute("onmouseup", "update_string('" + list_name + "')");
    // Update location bar
    window.history.pushState("{ list_name: " + list_name + "}", document.title, window.location.protocol + "/" + window.location.host + "/" + window.location.pathname + "?list=" + list_name);
    // Update active list picker button
    var list_picker_items = document.getElementsByClassName("list_picker_item");
    for ( var i=0; i < list_picker_items.length; i++ ) {
        if ( list_picker_items[i].innerText == list_name ) {
            if ( ! list_picker_items[i].classList.contains("active") ) { list_picker_items[i].classList.add("active"); }
        } else {
            if ( list_picker_items[i].classList.contains("active") ) { list_picker_items[i].classList.remove("active"); }
        }
    }
}
function update_list_picker() {
    var picker_contents = "";
    for (var local_list_name in lists) {
        picker_contents = picker_contents + '<button class="list_picker_item" onMouseUp="update_string(\'' + local_list_name + '\')">' + local_list_name + '</button>';
    }
    picker_contents = picker_contents.slice(0,-3);
    document.getElementById("list_picker").innerHTML = picker_contents;
}
function do_onload() {
    console.log("Loading scripts");
    update_list_picker();
    update_string();
}
// Run on page load
window.onload = do_onload;
</script>
<script src="lists.js"></script>
</head>
<body>
<div id="header">
  <h1 id="page_heading"></h1>
  <div id="list_picker_container">
    <span id="list_picker"></span>
  </div>
</div>
<div id="body" onMouseUp="update_string();">
  <div id="string_container">
    <span id="the_string"></span>
  </div>
  <div id="secondary_string_container">
    <span id="secondary_string"></span>
  </div>
</div>
<div id="footer">
</div>
</body>
</html>