这是示例的关于页面。
"); + Web!.CoreWebView2.Navigate(html); + } + } + catch { /* ignore */ } + } + private string BuildInjectedScript() + { + var hideScroll = _config.注入设置?.隐藏网页滚动条 == true; + var menuEnabled = _config.注入设置?.自定义右键菜单 == true; + var interceptEnabled = _config.注入设置?.拦截下载链接 == true; + + var css = hideScroll ? @"/* 隐藏所有滚动条 */ +::-webkit-scrollbar { width:0px; height:0px; background:transparent; } +html { scrollbar-width: none; } +body { -ms-overflow-style: none; } +* { scrollbar-width: none; -ms-overflow-style: none; } +*::-webkit-scrollbar { width:0px; height:0px; background:transparent; }" : string.Empty; + + var sb = new StringBuilder(); + sb.AppendLine("(() => {"); + sb.AppendLine(" function setup(){"); + sb.AppendLine(" try {"); + + if (!string.IsNullOrEmpty(css)) + { + sb.AppendLine(" try { var style=document.createElement('style'); style.textContent=`" + css.Replace("`", "\\`") + "`; (document.head||document.documentElement).appendChild(style); } catch(e){ console.warn('样式注入失败', e);} "); + } + + if (menuEnabled) + { + sb.AppendLine(@" try { + const oldMenu = document.getElementById('custom-context-menu'); if (oldMenu) oldMenu.remove(); + const m = document.createElement('div'); + m.id = 'custom-context-menu'; + m.style.cssText = 'position:fixed;background:#fff;border:1px solid #ccc;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);padding:8px 0;z-index:10000;display:none;min-width:120px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px'; + function item(t,fn){ const b=document.createElement('button'); b.textContent=t; b.style.cssText='padding:8px 16px;cursor:pointer;border:none;background:none;width:100%;text-align:left;font-size:14px;color:#333'; b.onmouseenter=()=>b.style.background='#f0f0f0'; b.onmouseleave=()=>b.style.background='transparent'; b.onclick=()=>{ fn(); hide(); }; return b; } + function hide(){ m.style.display='none'; } + function show(x,y){ m.style.left=x+'px'; m.style.top=y+'px'; m.style.display='block'; const r=m.getBoundingClientRect(); if(r.right>innerWidth) m.style.left=(x-r.width)+'px'; if(r.bottom>innerHeight) m.style.top=(y-r.height)+'px'; } + m.appendChild(item('← 返回', ()=>history.back())); + m.appendChild(item('🔄 刷新', ()=>location.reload())); + m.appendChild(item('ℹ️ 关于', ()=>{ try{ if(window.chrome&&window.chrome.webview){ window.chrome.webview.postMessage({type:'show_about'}); } }catch(_){ } })); + (document.body||document.documentElement).appendChild(m); + document.addEventListener('click', hide, {passive:true}); + document.addEventListener('scroll', hide, {passive:true}); + addEventListener('resize', hide, {passive:true}); + document.addEventListener('contextmenu', function(e){ e.preventDefault(); show(e.clientX,e.clientY); }, false); + } catch(e) { console.warn('右键菜单设置失败', e); } + "); + } + + if (interceptEnabled) + { + sb.AppendLine(@" try { + function isDownloadLink(a){ if(!a||!a.href) return false; if(a.hasAttribute('download')) return true; const u=(a.href||'').toLowerCase(); const exts=['.txt','.pdf','.doc','.docx','.xls','.xlsx','.ppt','.pptx','.zip','.rar','.7z','.tar','.gz','.jpg','.jpeg','.png','.gif','.bmp','.svg','.webp','.mp3','.wav','.ogg','.mp4','.avi','.mov','.wmv','.json','.xml','.csv','.md','.log']; for(const e of exts){ if(u.includes(e)) return true; } if(u.startsWith('data:')||u.startsWith('blob:')) return true; const kws=['download','export','save','下载','导出','保存']; const t=(a.textContent||'').toLowerCase(); const ti=(a.title||'').toLowerCase(); return kws.some(k=>t.includes(k)||ti.includes(k)); } + async function toBase64FromBlob(b){ const ab=await b.arrayBuffer(); const bytes=new Uint8Array(ab); let bin=''; const size=0x8000; for(let i=0;i这是用于演示的关于页面，展示从应用内打开本地 HTML 的能力。
+本应用由 WPF + WebView2 构建，支持：
+3*5si#`|VM#w?j
z%-R&jlBGmO7k!2EEh^}RqvGZTBmAD+Dbj%kxU9T9#Iru$vp(FaB3w29WUC