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/* Workspace interactions.
*
* Run and Submit are ordinary form submissions to /problems/<slug>/judge, so
* the workspace works with scripting disabled. This file adds the editor
* affordances the captured pane shows: line numbers, the Ln/Col readout, tab
* insertion, the language switch, the case tabs, the console tabs and the
* stopwatch. No guest code is ever executed here or on the server. */
(function () {
"use strict";
var editor = document.querySelector("[data-editor]");
var gutter = document.querySelector("[data-gutter]");
var cursor = document.querySelector("[data-cursor]");
var saved = document.querySelector("[data-saved-state]");
function lineCount(value) {
return value.split("\n").length;
}
function paintGutter() {
if (!gutter || !editor) {
return;
}
var total = lineCount(editor.value);
var numbers = [];
for (var index = 1; index <= total; index += 1) {
numbers.push(index);
}
gutter.textContent = numbers.join("\n");
}
function paintCursor() {
if (!cursor || !editor) {
return;
}
var upto = editor.value.slice(0, editor.selectionStart);
var lines = upto.split("\n");
cursor.textContent =
"Ln " + lines.length + ", Col " + (lines[lines.length - 1].length + 1);
}
if (editor) {
paintGutter();
paintCursor();
editor.addEventListener("input", function () {
paintGutter();
if (saved) {
saved.textContent = "Unsaved";
}
});
["keyup", "click", "select"].forEach(function (name) {
editor.addEventListener(name, paintCursor);
});
editor.addEventListener("scroll", function () {
if (gutter) {
gutter.style.transform = "translateY(" + -editor.scrollTop + "px)";
}
});
editor.addEventListener("keydown", function (event) {
if (event.key !== "Tab") {
return;
}
event.preventDefault();
var start = editor.selectionStart;
var end = editor.selectionEnd;
editor.value =
editor.value.slice(0, start) + " " + editor.value.slice(end);
editor.selectionStart = editor.selectionEnd = start + 4;
paintGutter();
paintCursor();
});
}
/* ---- language switch: reload with the chosen language -------------- */
var language = document.querySelector("[data-language]");
if (language) {
language.addEventListener("change", function () {
var url = new URL(window.location.href);
url.searchParams.set("lang", language.value);
window.location.href = url.pathname + url.search;
});
}
/* ---- testcase tabs -------------------------------------------------- */
var caseTabs = Array.prototype.slice.call(
document.querySelectorAll("[data-case-tab]")
);
var casePanels = Array.prototype.slice.call(
document.querySelectorAll("[data-case-panel]")
);
caseTabs.forEach(function (tab) {
tab.addEventListener("click", function () {
var wanted = tab.getAttribute("data-case-tab");
caseTabs.forEach(function (other) {
var active = other === tab;
other.classList.toggle("is-active", active);
other.setAttribute("aria-selected", active ? "true" : "false");
});
casePanels.forEach(function (panel) {
panel.classList.toggle(
"is-hidden",
panel.getAttribute("data-case-panel") !== wanted
);
});
});
});
/* ---- console tabs --------------------------------------------------- */
var consoleTabs = Array.prototype.slice.call(
document.querySelectorAll("[data-console-tab]")
);
var consolePanels = Array.prototype.slice.call(
document.querySelectorAll("[data-console-panel]")
);
consoleTabs.forEach(function (tab) {
tab.addEventListener("click", function () {
var wanted = tab.getAttribute("data-console-tab");
consoleTabs.forEach(function (other) {
other.classList.toggle("is-active", other === tab);
});
consolePanels.forEach(function (panel) {
panel.classList.toggle(
"is-hidden",
panel.getAttribute("data-console-panel") !== wanted
);
});
});
});
/* ---- stopwatch ------------------------------------------------------ */
var stopwatch = document.querySelector("[data-stopwatch]");
if (stopwatch) {
var elapsed = 0;
var running = false;
var pad = function (value) {
return value < 10 ? "0" + value : String(value);
};
var paint = function () {
stopwatch.textContent =
pad(Math.floor(elapsed / 3600)) +
":" +
pad(Math.floor((elapsed % 3600) / 60)) +
":" +
pad(elapsed % 60);
};
stopwatch.setAttribute("role", "button");
stopwatch.setAttribute("tabindex", "0");
stopwatch.title = "Start or pause the stopwatch";
stopwatch.addEventListener("click", function () {
running = !running;
});
window.setInterval(function () {
if (running) {
elapsed += 1;
paint();
}
}, 1000);
paint();
}
})();