docReady(() => { if (!EVALEX_TRUSTED) { initPinBox(); } // if we are in console mode, show the console. if (CONSOLE_MODE && EVALEX) { createInteractiveConsole(); } const frames = document.querySelectorAll("div.traceback div.frame"); if (EVALEX) { addConsoleIconToFrames(frames); } addEventListenersToElements(document.querySelectorAll("div.detail"), "click", () => document.querySelector("div.traceback").scrollIntoView(false) ); addToggleFrameTraceback(frames); addToggleTraceTypesOnClick(document.querySelectorAll("h2.traceback")); addInfoPrompt(document.querySelectorAll("span.nojavascript")); wrapPlainTraceback(); }); function addToggleFrameTraceback(frames) { frames.forEach((frame) => { frame.addEventListener("click", () => { frame.getElementsByTagName("pre")[0].parentElement.classList.toggle("expanded"); }); }) } function wrapPlainTraceback() { const plainTraceback = document.querySelector("div.plain textarea"); const wrapper = document.createElement("pre"); const textNode = document.createTextNode(plainTraceback.textContent); wrapper.appendChild(textNode); plainTraceback.replaceWith(wrapper); } function makeDebugURL(args) { const params = new URLSearchParams(args) params.set("s", SECRET) return `?__debugger__=yes&${params}` } function initPinBox() { document.querySelector(".pin-prompt form").addEventListener( "submit", function (event) { event.preventDefault(); const btn = this.btn; btn.disabled = true; fetch( makeDebugURL({cmd: "pinauth", pin: this.pin.value}) ) .then((res) => res.json()) .then(({auth, exhausted}) => { if (auth) { EVALEX_TRUSTED = true; fadeOut(document.getElementsByClassName("pin-prompt")[0]); } else { alert( `Error: ${ exhausted ? "too many attempts. Restart server to retry." : "incorrect pin" }` ); } }) .catch((err) => { alert("Error: Could not verify PIN. Network error?"); console.error(err); }) .finally(() => (btn.disabled = false)); }, false ); } function promptForPin() { if (!EVALEX_TRUSTED) { fetch(makeDebugURL({cmd: "printpin"})); const pinPrompt = document.getElementsByClassName("pin-prompt")[0]; fadeIn(pinPrompt); document.querySelector('.pin-prompt input[name="pin"]').focus(); } } /** * Helper function for shell initialization */ function openShell(consoleNode, target, frameID) { promptForPin(); if (consoleNode) { slideToggle(consoleNode); return consoleNode; } let historyPos = 0; const history = [""]; const consoleElement = createConsole(); const output = createConsoleOutput(); const form = createConsoleInputForm(); const command = createConsoleInput(); target.parentNode.appendChild(consoleElement); consoleElement.append(output); consoleElement.append(form); form.append(command); command.focus(); slideToggle(consoleElement); form.addEventListener("submit", (e) => { handleConsoleSubmit(e, command, frameID).then((consoleOutput) => { output.append(consoleOutput); command.focus(); consoleElement.scrollTo(0, consoleElement.scrollHeight); const old = history.pop(); history.push(command.value); if (typeof old !== "undefined") { history.push(old); } historyPos = history.length - 1; command.value = ""; }); }); command.addEventListener("keydown", (e) => { if (e.key === "l" && e.ctrlKey) { output.innerText = "--- screen cleared ---"; } else if (e.key === "ArrowUp" || e.key === "ArrowDown") { // Handle up arrow and down arrow. if (e.key === "ArrowUp" && historyPos > 0) { e.preventDefault(); historyPos--; } else if (e.key === "ArrowDown" && historyPos < history.length - 1) { historyPos++; } command.value = history[historyPos]; } return false; }); return consoleElement; } function addEventListenersToElements(elements, event, listener) { elements.forEach((el) => el.addEventListener(event, listener)); } /** * Add extra info */ function addInfoPrompt(elements) { for (let i = 0; i < elements.length; i++) { elements[i].innerHTML = "

To switch between the interactive traceback and the plaintext " + 'one, you can click on the "Traceback" headline. From the text ' + "traceback you can also create a paste of it. " + (!EVALEX ? "" : "For code execution mouse-over the frame you want to debug and " + "click on the console icon on the right side." + "

You can execute arbitrary Python code in the stack frames and " + "there are some extra helpers available for introspection:" + "

dump() shows all variables in the frame" + "
dump(obj) dumps all that's known about the object

"); elements[i].classList.remove("nojavascript"); } } function addConsoleIconToFrames(frames) { for (let i = 0; i < frames.length; i++) { let consoleNode = null; const target = frames[i]; const frameID = frames[i].id.substring(6); for (let j = 0; j < target.getElementsByTagName("pre").length; j++) { const img = createIconForConsole(); img.addEventListener("click", (e) => { e.stopPropagation(); consoleNode = openShell(consoleNode, target, frameID); return false; }); target.getElementsByTagName("pre")[j].append(img); } } } function slideToggle(target) { target.classList.toggle("active"); } /** * toggle traceback types on click. */ function addToggleTraceTypesOnClick(elements) { for (let i = 0; i < elements.length; i++) { elements[i].addEventListener("click", () => { document.querySelector("div.traceback").classList.toggle("hidden"); document.querySelector("div.plain").classList.toggle("hidden"); }); elements[i].style.cursor = "pointer"; document.querySelector("div.plain").classList.toggle("hidden"); } } function createConsole() { const consoleNode = document.createElement("pre"); consoleNode.classList.add("console"); consoleNode.classList.add("active"); return consoleNode; } function createConsoleOutput() { const output = document.createElement("div"); output.classList.add("output"); output.innerHTML = "[console ready]"; return output; } function createConsoleInputForm() { const form = document.createElement("form"); form.innerHTML = ">>> "; return form; } function createConsoleInput() { const command = document.createElement("input"); command.type = "text"; command.setAttribute("autocomplete", "off"); command.setAttribute("spellcheck", false); command.setAttribute("autocapitalize", "off"); command.setAttribute("autocorrect", "off"); return command; } function createIconForConsole() { const img = document.createElement("img"); img.setAttribute("src", makeDebugURL({cmd: "resource", f: "console.png"})); img.setAttribute("title", "Open an interactive python shell in this frame"); return img; } function createExpansionButtonForConsole() { const expansionButton = document.createElement("a"); expansionButton.setAttribute("href", "#"); expansionButton.setAttribute("class", "toggle"); expansionButton.innerHTML = " "; return expansionButton; } function createInteractiveConsole() { const target = document.querySelector("div.console div.inner"); while (target.firstChild) { target.removeChild(target.firstChild); } openShell(null, target, 0); } function handleConsoleSubmit(e, command, frameID) { // Prevent page from refreshing. e.preventDefault(); return new Promise((resolve) => { fetch(makeDebugURL({cmd: command.value, frm: frameID})) .then((res) => { return res.text(); }) .then((data) => { const tmp = document.createElement("div"); tmp.innerHTML = data; resolve(tmp); // Handle expandable span for long list outputs. // Example to test: list(range(13)) let wrapperAdded = false; const wrapperSpan = document.createElement("span"); const expansionButton = createExpansionButtonForConsole(); tmp.querySelectorAll("span.extended").forEach((spanToWrap) => { const parentDiv = spanToWrap.parentNode; if (!wrapperAdded) { parentDiv.insertBefore(wrapperSpan, spanToWrap); wrapperAdded = true; } parentDiv.removeChild(spanToWrap); wrapperSpan.append(spanToWrap); spanToWrap.hidden = true; expansionButton.addEventListener("click", (event) => { event.preventDefault(); spanToWrap.hidden = !spanToWrap.hidden; expansionButton.classList.toggle("open"); return false; }); }); // Add expansion button at end of wrapper. if (wrapperAdded) { wrapperSpan.append(expansionButton); } }) .catch((err) => { console.error(err); }); return false; }); } function fadeOut(element) { element.style.opacity = 1; (function fade() { element.style.opacity -= 0.1; if (element.style.opacity < 0) { element.style.display = "none"; } else { requestAnimationFrame(fade); } })(); } function fadeIn(element, display) { element.style.opacity = 0; element.style.display = display || "block"; (function fade() { let val = parseFloat(element.style.opacity) + 0.1; if (val <= 1) { element.style.opacity = val; requestAnimationFrame(fade); } })(); } function docReady(fn) { if (document.readyState === "complete" || document.readyState === "interactive") { setTimeout(fn, 1); } else { document.addEventListener("DOMContentLoaded", fn); } }

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