Widget:SyntaxhighlightCopy

为Syntaxhighlight标签右上角添加复制按钮。代码完全由AI生成。

使用方式： 1. 为 syntaxhighlight 添加 class="copy" 2. 引入Widget {{#Widget:SyntaxhighlightCopy}}

代码：

(function () {
  'use strict';
  function runOnDOMReady(fn){ document.readyState==='loading' ? document.addEventListener('DOMContentLoaded', fn) : fn(); }
  function qsa(sel, root){ return Array.from((root||document).querySelectorAll(sel)); }

  function copyToClipboard(text){
    if (navigator.clipboard && window.isSecureContext) {
      return navigator.clipboard.writeText(text).then(()=>true, ()=>false);
    }
    const ta = document.createElement('textarea');
    ta.value = text; ta.style.cssText = 'position:fixed;opacity:0;pointer-events:none;';
    document.body.appendChild(ta); ta.select();
    let ok = false; try { ok = document.execCommand('copy'); } catch(e){}
    ta.remove(); return Promise.resolve(ok);
  }

  runOnDOMReady(function(){
    qsa('div.copy.mw-highlight').forEach(function(block){
      if (!block || block.querySelector('.bwiki-copy-btn')) return;
      if (getComputedStyle(block).position === 'static') block.style.position = 'relative';

      const btn = document.createElement('button');
      btn.className = 'bwiki-copy-btn';
      btn.textContent = '复制';
      btn.title = '点击复制代码';
      btn.style.cssText = 'position:absolute;top:8px;right:8px;z-index:10;padding:4px 8px;font-size:12px;background:#36c;color:#fff;border:none;border-radius:3px;cursor:pointer;opacity:.85;transition:opacity .2s';
      btn.onmouseenter = function(){ this.style.opacity = '1'; };
      btn.onmouseleave = function(){ this.style.opacity = '.85'; };
      btn.onclick = function(){
        const pre = block.querySelector('pre');
        const text = pre ? (pre.textContent||'').trim() : '';
        const restore = (label,bg)=>{ const oldT=btn.textContent, oldB=btn.style.background; btn.textContent=label; btn.style.background=bg; setTimeout(()=>{ btn.textContent=oldT; btn.style.background=oldB; }, 1600); };
        copyToClipboard(text).then(ok => ok ? restore('已复制!', '#0a5') : restore('复制失败', '#d33'));
      };
      block.appendChild(btn);
    });
  });
})();