feat: add code block copy feature

_config.yml

@@ -15,7 +15,7 @@ menu:
 
 # RSS
 rss:
-  enable: false
+  enable: true
 
 # favicon
 favicon: images/favicon.png
@@ -66,4 +66,10 @@ local_search:
   # Unescape html strings to the readable one.
   unescape: false
   # Preload the search data when the page loads.
-  preload: false
+  preload: false
+
+# Code Block
+codeblock:
+  style: flat  # Available values: default | flat | mac
+  copy_button:
+    enable: true

layout/_partial/scripts.ejs

@@ -1 +1,9 @@
-<%- js(['js/main.js', 'js/header-shrink.js', 'js/toggle-mode.js', 'js/scroll-to-top.js']) %>
+<%- js([
+    'js/main.js',
+    'js/header-shrink.js',
+    'js/toggle-mode.js',
+    'js/scroll-to-top.js'
+]) %>
+<% if (theme.codeblock.copy_button.enable) { %>
+    <%- js('js/code-copy.js') %>
+<% } %>

source/css/layout/common/codeblock/highlight.styl

@@ -15,7 +15,7 @@ $code-block {
   }
 
   &::-webkit-scrollbar-thumb {
-    border-radius: 5px;
+    border-radius: 1px;
     background: rgba(0, 0, 0, 0.3)
   }
 
@@ -60,6 +60,7 @@ pre {
     padding: 10px 0;
   }
 
+
   table {
     margin: 0;
     width: auto;
@@ -67,6 +68,7 @@ pre {
     border-spacing: unset;
   }
 
+
   td {
     border: none;
     padding: 0;

source/css/layout/common/variables.styl

@@ -25,7 +25,7 @@ $z-index-6 = 1006;
 // color
 // ===============================
 // normal mode color
-$primary-color = #f04c12; // 主题颜色
+$primary-color = #1b65ea; // 主题颜色
 $background-color = #fdfdfd; // 背景颜色
 $normal-text-color = #44424e; // 通用文本颜色（默认字体颜色）
 $first-text-color = darken($normal-text-color, 15%); // 第一文本颜色

source/css/style.styl

@@ -16,4 +16,5 @@
 @import "layout/category-content.styl"
 @import "layout/tag-content.styl"
 @import "layout/common/markdown.styl"
-@import "layout/common/highlight/highlight.styl"
+@import "layout/common/codeblock/highlight.styl"
+@import "layout/common/codeblock/copy-code.styl"

source/js/code-copy.js

@@ -0,0 +1,45 @@
+HTMLElement.prototype.wrap = function (wrapper) {
+    this.parentNode.insertBefore(wrapper, this);
+    this.parentNode.removeChild(this);
+    wrapper.appendChild(this);
+};
+
+window.addEventListener('DOMContentLoaded', () => {
+    document.querySelectorAll('figure.highlight').forEach(element => {
+        const box = document.createElement('div');
+        element.wrap(box);
+        box.classList.add('highlight-container');
+        box.insertAdjacentHTML('beforeend', '<div class="copy-btn"><i class="fa fa-clipboard"></i></div>');
+        var button = element.parentNode.querySelector('.copy-btn');
+        button.addEventListener('click', event => {
+            var target = event.currentTarget;
+            var code = [...target.parentNode.querySelectorAll('.code .line')].map(line => line.innerText).join('\n');
+            var ta = document.createElement('textarea');
+            ta.style.top = window.scrollY + 'px'; // Prevent page scrolling
+            ta.style.position = 'absolute';
+            ta.style.opacity = '0';
+            ta.readOnly = true;
+            ta.value = code;
+            document.body.append(ta);
+            const selection = document.getSelection();
+            const selected = selection.rangeCount > 0 ? selection.getRangeAt(0) : false;
+            ta.select();
+            ta.setSelectionRange(0, code.length);
+            ta.readOnly = false;
+            var result = document.execCommand('copy');
+            target.querySelector('i').className = result ? 'fa fa-check' : 'fa fa-times';
+            ta.blur(); // For iOS
+            target.blur();
+            if (selected) {
+                selection.removeAllRanges();
+                selection.addRange(selected);
+            }
+            document.body.removeChild(ta);
+        });
+        button.addEventListener('mouseleave', event => {
+            setTimeout(() => {
+                event.target.querySelector('i').className = 'fa fa-clipboard';
+            }, 300);
+        });
+    });
+});