Initial commit

.gitattributes

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+.gitattributes export-ignore
+.gitignore export-ignore
+.gitmodules export-ignore
+.github export-ignore
+.travis export-ignore
+.travis.yml export-ignore
+.editorconfig export-ignore
+.styleci.yml export-ignore
+
+phpunit.xml export-ignore
+tests export-ignore
+
+js/dist/* -diff
+js/dist/* linguist-generated
+js/dist-typings/* linguist-generated
+js/yarn.lock -diff
+js/package-lock.json -diff
+
+* text=auto eol=lf

.gitignore

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+/vendor
+composer.lock
+composer.phar
+
+.DS_Store
+Thumbs.db
+tests/.phpunit.result.cache
+/tests/integration/tmp
+.vagrant
+.idea/*
+.vscode
+js/coverage-ts

LICENSE.md

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+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Sticky Sidenav
+
+![License](https://img.shields.io/badge/license-MIT-blue.svg) [![Latest Stable Version](https://img.shields.io/packagist/v/ecnu-im/sticky-sidenav.svg)](https://packagist.org/packages/ecnu-im/sticky-sidenav) [![Total Downloads](https://img.shields.io/packagist/dt/ecnu-im/sticky-sidenav.svg)](https://packagist.org/packages/ecnu-im/sticky-sidenav)
+
+A [Flarum](http://flarum.org) extension. Make the sidenav section sticky and scrollable. Also support hot-discussions widget.
+
+## Installation
+
+Install with composer:
+
+```sh
+composer require ecnu-im/sticky-sidenav:"*"
+```
+
+## Updating
+
+```sh
+composer update ecnu-im/sticky-sidenav:"*"
+php flarum migrate
+php flarum cache:clear
+```
+
+## Links
+
+- [Packagist](https://packagist.org/packages/ecnu-im/sticky-sidenav)
+- [GitHub](https://github.com/ecnu-im/sticky-sidenav)
+- [Discuss](https://discuss.flarum.org/d/PUT_DISCUSS_SLUG_HERE)

composer.json

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+{
+    "name": "ecnu-im/sticky-sidenav",
+    "description": "Make the sidenav section sticky and scrollable. Also support hot-discussions widget.",
+    "keywords": [
+        "flarum"
+    ],
+    "type": "flarum-extension",
+    "license": "MIT",
+    "require": {
+        "flarum/core": "^1.2.0"
+    },
+    "authors": [
+        {
+            "name": "merc",
+            "email": "[email protected]",
+            "role": "Developer"
+        }
+    ],
+    "extra": {
+        "flarum-extension": {
+            "title": "Sticky Sidenav",
+            "category": "",
+            "icon": {
+                "name": "",
+                "color": "",
+                "backgroundColor": ""
+            }
+        },
+        "flarum-cli": {
+            "modules": {
+                "admin": false,
+                "forum": true,
+                "js": false,
+                "jsCommon": false,
+                "css": true,
+                "locale": false,
+                "gitConf": true,
+                "githubActions": false,
+                "prettier": false,
+                "typescript": false,
+                "bundlewatch": false,
+                "backendTesting": false,
+                "editorConfig": false,
+                "styleci": false
+            }
+        }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}

extend.php

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+<?php
+
+/*
+ * This file is part of ecnu-im/sticky-sidenav.
+ *
+ * Copyright (c) 2022 merc.
+ *
+ * For the full copyright and license information, please view the LICENSE.md
+ * file that was distributed with this source code.
+ */
+
+namespace ECNUIM\StickySidenav;
+
+use Flarum\Extend;
+
+return [
+    (new Extend\Frontend('forum'))
+
+        ->css(__DIR__.'/less/forum.less'),
+
+
+];

less/forum.less

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+@media (min-width: 992px) {
+    .sideNav>ul {
+        height: 100%;
+        position: sticky;
+    }
+
+    .sideNav>ul>.item-nav {
+        position: sticky;
+        top: 70px;
+        max-height: 90vh;
+        overflow-x: hidden;
+        overflow-y: hidden;
+        /* For iOS */
+        cursor: pointer;
+        /* For Firefox */
+        scrollbar-width: thin;
+
+        &:hover {
+            overflow-y: auto;
+        }
+    }
+
+    .App {
+        overflow-x: visible;
+    }
+}
+
+.hotDiscussions-widget {
+    position: sticky;
+    top: 70px;
+    max-height: 90vh;
+}
+
+::-webkit-scrollbar {
+    width: 5px;
+    background-color: #e0e0e0;
+}
+
+::-webkit-scrollbar-thumb {
+    background: #9e9e9e;
+    border-radius: 5px;
+}