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Gymnasium/docs/environments/atari/gopher.md

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---
title: Gopher
---
# Gopher
<html>
<head>
<title>Redirecting to Gopher's documentation</title>
<style>
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:root {
--background-color: #ffffff;
--text-color: #333333;
--popup-background: #ffffff;
--popup-shadow: rgba(0, 0, 0, 0.5);
--button-background: #f0f0f0;
--button-text: #333333;
--button-hover: #e0e0e0;
--button-border: #cccccc;
--link-color: #0066cc;
}
@media (prefers-color-scheme: dark) {
:root {
--background-color: #222222;
--text-color: #e0e0e0;
--popup-background: #333333;
--popup-shadow: rgba(0, 0, 0, 0.7);
--button-background: #444444;
--button-text: #e0e0e0;
--button-hover: #555555;
--button-border: #666666;
--link-color: #66b0ff;
}
}
body {
background-color: var(--background-color);
color: var(--text-color);
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
line-height: 1.5;
margin: 20px;
transition: background-color 0.3s, color 0.3s;
}
a {
color: var(--link-color);
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
/* Basic styles for the popup */
.popup {
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display: none;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: var(--popup-shadow);
z-index: 999;
justify-content: center;
align-items: center;
}
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.popup-content {
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background-color: var(--popup-background);
padding: 20px;
border-radius: 10px;
text-align: center;
width: 300px;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
transition: background-color 0.3s;
}
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button {
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margin-top: 10px;
padding: 8px 14px;
cursor: pointer;
background-color: var(--button-background);
color: var(--button-text);
border: 1px solid var(--button-border);
border-radius: 4px;
font-size: 14px;
transition: background-color 0.2s, color 0.2s;
}
button:hover {
background-color: var(--button-hover);
}
#atariRedirectBtn {
background-color: var(--link-color);
color: white;
border: none;
}
#atariRedirectBtn:hover {
opacity: 0.9;
}
label {
display: block;
margin: 15px 0;
user-select: none;
}
</style>
</head>
<body>
<p>If you are not redirected automatically, follow this <a href="https://ale.farama.org/environments/gopher">link to Gopher's new page</a>.</p>
<div id="popup" class="popup">
<div class="popup-content">
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<p>Gopher's documentation has moved to <b>ale.farama.org</b></p>
<label>
<input type="checkbox" id="atariAutoRedirect">Enable auto-redirect next time
</label>
<br>
<button id="atariRedirectBtn">Redirect to the new website</button>
<button id="closePopupBtn">Close</button>
</div>
</div>
</body>
<script>
// Function to get a cookie by name
function getCookie(name) {
console.log(`${document.cookie}`);
const value = `; ${document.cookie}`;
const parts = value.split(`; ${name}=`);
if (parts.length === 2) {
return parts.pop().split(';').shift();
}
}
// Function to set a cookie
function setCookie(name, value, days) {
const date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
const expires = `expires=${date.toUTCString()}`;
document.cookie = `${name}=${value}; ${expires}; path=/`; // environments/atari/
}
// Show popup if the cookie doesn't exist
window.onload = function() {
const atariAutoRedirect = getCookie('atariAutoRedirect');
if (atariAutoRedirect) {
window.location.href = "https://ale.farama.org/environments/gopher";
} else {
document.getElementById('popup').style.display = 'flex';
}
};
// Close popup and handle the "Don't show again" option
document.getElementById('closePopupBtn').addEventListener('click', function() {
document.getElementById('popup').style.display = 'none';
});
document.getElementById('atariRedirectBtn').addEventListener("click", function() {
if (document.getElementById('atariAutoRedirect').checked) {
setCookie('atariAutoRedirect', 'true', 90); // Set cookie to not show for 90 days
}
console.log("redirecting");
window.location.href = "https://ale.farama.org/environments/gopher";
})
</script>
</html>