226 lines
8.2 KiB
HTML
226 lines
8.2 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta name="author" content="Felix W. Dekker" />
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<meta name="application-name" content="Converter" />
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<meta name="description" content="Converts numbers to and from various bases." />
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<meta name="theme-color" content="#0033cc" />
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<title>Converter | FWDekker</title>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300italic,700,700italic"
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crossorigin="anonymous" />
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css"
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integrity="sha256-l85OmPOjvil/SOvVt3HnSSjzF1TUMyT9eV0c2BzEGzU=" crossorigin="anonymous" />
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/milligram/1.3.0/milligram.min.css"
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integrity="sha256-Ro/wP8uUi8LR71kwIdilf78atpu8bTEwrK5ZotZo+Zc=" crossorigin="anonymous" />
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<link rel="stylesheet" href="https://static.fwdekker.com/css/milligram-common.css" crossorigin="anonymous" />
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</head>
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<body>
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<main class="wrapper">
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<!-- Header -->
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<header class="header">
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<section class="container">
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<h1>Converter</h1>
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<blockquote>
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<p><em>Convert numbers to and from various bases.</em></p>
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</blockquote>
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</section>
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</header>
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<!-- Input -->
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<section class="container">
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<div class="row">
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<div class="column">
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<form>
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<fieldset id="inputs">
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</fieldset>
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</form>
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</div>
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</div>
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</section>
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<!-- Footer -->
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<footer class="footer">
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<section class="container">
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Made by <a href="https://fwdekker.com/">Felix W. Dekker</a>.
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Licensed under the
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<a href="https://git.fwdekker.com/FWDekker/converter/src/branch/master/LICENSE">MIT License</a>.
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Source code available on <a href="https://git.fwdekker.com/FWDekker/converter/">git</a>.
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</section>
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</footer>
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</main>
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<!-- Scripts -->
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<script src="https://static.fwdekker.com/js/common.js" crossorigin="anonymous"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/big-integer/1.6.44/BigInteger.min.js"
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integrity="sha256-es+ex6Oj344uak+VnCPyaHY2nzQkqhr7ByWVQgdjATA=" crossorigin="anonymous"></script>
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<script>
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const stringReplaceAt =
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(str, index, replacement) => str.substr(0, index) + replacement + str.substr(index + replacement.length);
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const stringReplaceAll =
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(str, target, replacement) => str.split(target).join(replacement);
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class NumeralSystem {
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constructor(base, alphabet, caseSensitive) {
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this.base = base;
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this.alphabet = alphabet;
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this.caseSensitive = caseSensitive;
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}
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decimalToBase(decimalNumber) {
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return decimalNumber.toString(this.base, this.alphabet);
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}
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baseToDecimal(baseString) {
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return bigInt(baseString, this.base, this.alphabet, this.caseSensitive);
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}
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filterBaseString(baseString) {
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// Regex from https://stackoverflow.com/a/3561711/
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const alphabet = this.caseSensitive
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? this.alphabet
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: this.alphabet.toLowerCase() + this.alphabet.toUpperCase();
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const regexSafeAlphabet = alphabet.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
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return baseString.replace(new RegExp(`[^${regexSafeAlphabet}]`, "g"), "");
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}
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}
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class NumeralSystemInput {
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constructor(name, numeralSystem) {
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this.name = name;
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this.numeralSystem = numeralSystem;
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this.label = document.createElement("label");
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this.label.setAttribute("for", `${this.name}Input`);
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this.label.innerHTML = this.name;
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this.textarea = document.createElement("textarea");
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this.textarea.id = `${this.name}Input`;
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this.textarea.className = "numberInput";
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this.textarea.oninput = () => {
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if (this.textarea.value === undefined || this.textarea.value === null || this.textarea.value === "")
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return;
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this.textarea.value = this.numeralSystem.filterBaseString(this.textarea.value);
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updateAllInputs(this.numeralSystem.baseToDecimal(this.textarea.value));
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};
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}
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addToParent(parent) {
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parent.appendChild(this.label);
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parent.appendChild(this.textarea);
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}
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update(decimalNumber) {
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this.textarea.value = this.numeralSystem.decimalToBase(decimalNumber);
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}
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}
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class Base64NumeralSystemInput extends NumeralSystemInput {
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// TODO Convert static methods to static properties once supported by Firefox
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static defaultAlphabet() {
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return "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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}
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static dropdownOptions() {
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return {"Standard": ['+', '/'], "Filename": ['-', '_'], "IMAP": ['+', ',']};
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}
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constructor(name) {
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super(name, new NumeralSystem(64, Base64NumeralSystemInput.defaultAlphabet(), true));
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this.dropdownLabel = document.createElement("label");
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this.dropdownLabel.setAttribute("for", `${this.name}Dropdown`);
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this.dropdownLabel.innerHTML = "Character set";
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this.dropdownLabel.classList.add("label-inline");
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this.dropdown = document.createElement("select");
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this.dropdown.id = `${this.name}Dropdown`;
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this.dropdown.onchange = () => {
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const selectedOption = Base64NumeralSystemInput.dropdownOptions()[this.dropdown.value];
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this.setLastDigits(selectedOption[0], selectedOption[1]);
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};
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this.dropdownDiv = document.createElement("div");
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this.dropdownDiv.classList.add("float-right");
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this.options =
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Object.keys(Base64NumeralSystemInput.dropdownOptions()).map(key => {
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const option = document.createElement("option");
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option.value = key;
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option.text = key + ": " + Base64NumeralSystemInput.dropdownOptions()[key].join("");
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return option;
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});
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}
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setLastDigits(c62, c63) {
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const oc62 = this.numeralSystem.alphabet[62];
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const oc63 = this.numeralSystem.alphabet[63];
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this.numeralSystem.alphabet =
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stringReplaceAt(stringReplaceAt(this.numeralSystem.alphabet, 62, c62), 63, c63);
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this.textarea.value =
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stringReplaceAll(stringReplaceAll(this.textarea.value, oc62, c62), oc63, c63);
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}
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addToParent(parent) {
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this.dropdownDiv.appendChild(this.dropdownLabel);
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this.options.forEach(option => this.dropdown.appendChild(option));
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this.dropdownDiv.appendChild(this.dropdown);
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parent.appendChild(this.dropdownDiv);
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parent.appendChild(this.label);
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parent.appendChild(this.textarea);
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}
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}
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const inputs = [
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new NumeralSystemInput("Binary", new NumeralSystem(2, "01")),
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new NumeralSystemInput("Octal", new NumeralSystem(8, "01234567")),
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new NumeralSystemInput("Decimal", new NumeralSystem(10, "0123456789")),
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new NumeralSystemInput("Duodecimal", new NumeralSystem(12, "0123456789ab", caseSensitive = false)),
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new NumeralSystemInput("Hexadecimal", new NumeralSystem(16, "0123456789abcdef", caseSensitive = false)),
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new Base64NumeralSystemInput("Base64"),
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new NumeralSystemInput(
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"ASCII",
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new NumeralSystem(
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256,
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new Array(256).fill(0).map((_, it) => String.fromCharCode(it)).join(""),
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caseSensitive = true
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)
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),
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];
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const updateAllInputs = newValue => {
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for (const input of inputs)
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input.update(newValue);
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};
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doAfterLoad(() => {
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const inputParent = $("#inputs");
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for (const input of inputs)
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input.addToParent(inputParent);
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updateAllInputs(bigInt(42));
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inputs[0].textarea.focus();
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});
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</script>
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</body>
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</html>
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