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uweb/misc/ebrowser/index.html

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<!--
Copyright (C) 2024 Richard Hao Cao
-->
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<!DOCTYPE html><html><head><meta charset="UTF-8">
<style>
html{
height: 100%;
overflow: hidden;
}
body{
display: flex;
flex-direction: column;
height: 100%;
}
div.webviews{
display: flex;
flex-direction: column;
flex-grow:1;
}
webview{display: none;width:100%;height:100%}
.curWV{display: inherit !important;}
</style>
<script>
const fs = require('fs');
const path = require('path');
const readline = require('readline');
var iTab = 0;
var tabs;
var engines = {};
var mapKeys = {};
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var closedUrls = [];
var defaultSE = "https://www.bing.com/search?q=%s";
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let lastKeys;
let lastKeys_millis = 0;
fs.readFile(path.join(__dirname,'search.json'), 'utf8', (err, jsonString) => {
if (err) return;
initSearchEngines(jsonString,false);
});
fs.readFile(path.join(__dirname,'mapkeys.json'), 'utf8', (err, jsonStr) => {
if (err) return;
try {
mapKeys = JSON.parse(jsonStr);
}catch(e){}
});
appendAutoc_rec(path.join(__dirname,'default.autoc'),null);
appendAutoc_rec(path.join(__dirname,'bookmark.rec'),' ');
function initSearchEngines(jsonStr){
try{
let val1st;
engines=JSON.parse(jsonStr, (key, value)=>{
if(!val1st && !(/^\d+$/u.test(key))) val1st=value;
return value;
});
if(val1st) defaultSE=val1st;
}catch(e){}
}
function save(filePath, u8array){
//alert(Object.prototype.toString.call(u8array))
fs.writeFile (filePath, u8array, (err) => {
if (err) {
console.error (err);
return;
}
});
}
function print2PDF(filePath, options){
tabs.children[iTab].printToPDF(options)
.then(u8array=>save(filePath,u8array));
}
function bookmark(args){//b [filenamestem] url title :bookmark
let bmFileName = "bookmark.rec";
let tab = tabs.children[iTab];
let url = tab.getURL();
if(args.length>1)
bmFileName = args[1]+".rec";
let title = tab.getTitle();
let line = title + " " + url + "\n";
fs.appendFile(path.join(__dirname,bmFileName), line, (err)=>{});
}
function switchTab(i){
let tab = tabs.children[iTab];
if(document.activeElement == tab) tab.blur();
tab.classList.remove('curWV');
iTab = i;
tabs.children[iTab].classList.add('curWV');
}
function newTab(){
var tab = document.createElement('webview');
tab.allowpopups = true;
tabs.appendChild(tab);
}
function tabInc(num){
let nTabs = tabs.children.length;
if(nTabs<2) return;
let i = iTab +num;
if(i>=nTabs) i=0;
switchTab(i);
}
function tabDec(num){
let nTabs = tabs.children.length;
if(nTabs<2) return;
let i = iTab +num;
if(i<0) i=nTabs-1;
switchTab(i);
}
function tabClose(){
let nTabs = tabs.children.length;
if(nTabs<2) return "";//no remain tab
let tab = tabs.children[iTab];
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closedUrls.push(tab.getURL());
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if(document.activeElement == tab) tab.blur();
tabs.removeChild(tab);
nTabs--;
if(iTab>=nTabs) iTab=iTab-1;
tabs.children[iTab].classList.add('curWV');
return getWinTitle();
}
function getWinTitle(){
let t=tabs.children[iTab];
let title = (iTab+1) + '/' + tabs.children.length;
try{title=title+' '+t.getTitle()+' '+t.getURL()}catch(e){}
return title
}
async function appendAutoc_rec(filename, delimit){
try{
const readInterface = readline.createInterface ({
input: fs.createReadStream (filename, 'utf8'),
});
for await (const line of readInterface) {
let opt = document.createElement('option');
let iS;
if(delimit && (iS=line.lastIndexOf(delimit))>0){
opt.value = line.substring(iS+delimit.length);
opt.textContent = line.substring(0,iS);
}else
opt.value = line;
document.forms[0].children[0].appendChild(opt);
}
}catch(e){return;}
}
function keyPress(e){
var inputE = document.forms[0].q;
if (e.altKey||e.metaKey)
return;
var key = e.key;
if(e.ctrlKey){
switch(key){
case "Home":
tabs.children[iTab].src = "javascript:window.scrollTo(0,0)";
return;
case "End":
tabs.children[iTab].src="javascript:window.scrollTo(0,document.body.scrollHeight)"
return;
}
return;
}
switch(key){
case "PageDown":
tabs.children[iTab].src =
"javascript:window.scrollBy(0,3*document.documentElement.clientHeight/4)";
return;
case "PageUp":
tabs.children[iTab].src = "javascript:window.scrollBy(0,-3*document.documentElement.clientHeight/4)";
return;
case "ArrowDown":
tabs.children[iTab].src="javascript:window.scrollBy(0,32)";
return;
case "ArrowUp":
tabs.children[iTab].src="javascript:window.scrollBy(0,-32)";
return;
}
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if(inputE === document.activeElement){
if (9===e.keyCode){//tab completion
}
return;
}
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if(1!=key.length) return;
var curMillis = Date.now();
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if(curMillis-lastKeys_millis>1000)
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lastKeys = null;
lastKeys_millis = curMillis;
switch (key) {
case "!":
inputE.value = ":";
inputE.focus();
lastKeys = null;
return;
case "/":
case ":":
inputE.value = "";
inputE.focus();
lastKeys = null;
return;
}
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lastKeys = !lastKeys ? key : lastKeys + key;
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let cmds = mapKeys[lastKeys];
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if(cmds){//try to run cmds
let keyLen = lastKeys.length;
setTimeout(()=>{
if(lastKeys.length != keyLen) return;
lastKeys = null;
for(var cmd of cmds.split("\n"))
handleQuery(cmd);
}, 500);
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}
}
function getQ(){return document.forms[0].q.value;}
function bang(query, iSpace){
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let se=defaultSE;
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if(iSpace>0){
let name = query.slice(0,iSpace);
let engine = engines[name];
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if(engine){
se = engine;
query = query.substring(iSpace+1);
}
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}
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return se.replace('%s',query);
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}
function coloncommand(q){
document.title = q;
}
function coloncommand_render(cmd){
args = cmd.substring(1).split(/\s+/);
switch(args[0]){
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case "ac":
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autoc(args);
return;
case "b":
bookmark(args);
return;
case "bml":
bml(args);
return;
case "pdf":
savePdf(args);
return;
}
}
function autoc(args){
if(2!=args.length) return;
appendAutoc_rec(path.join(__dirname,args[1]+".rec"),' ');
}
function bml(args){
if(2!=args.length) return;
let filename = args[1]+".js";
fs.readFile(path.join(__dirname,filename), 'utf8', (err,str) => {
if (err) return;
tabs.children[iTab].executeJavaScript(str,false);
});
}
function savePdf(args){
let filename = "ebrowser.pdf";
let options = {};
if(1<args.length){
let c0 = args[1].charCodeAt(0);
let i = 1;
if(123!=c0){//not '{' options then it is filename
filename = args[1] + ".pdf";
i = 2;
}
if(i==args.length-1){//:Pdf [filename] {...}
if(2==args[i].length){// '{}'
let width = document.body.clientWidth/96;
tabs.children[iTab].executeJavaScript("document.documentElement.scrollHeight",
false).then((h)=>{
let opts = {
printBackground:true,
pageSize:{width:width,height:h/96}};
print2PDF(filename,opts);
});
return;
}else{
try {
options = JSON.parse(args[i]);
}catch(e){};
}
}
}
print2PDF(filename,options);
}
function handleQuery(q){
if(q.length>1){
let c0=q.charCodeAt(0);
switch(c0){
case 47://"/"
tabs.children[iTab].findInPage(q.substring(1));
return;
case 58://':'
let c1=q.charCodeAt(1);
if(c1>98 && 112!=c1)
coloncommand(q);
else
coloncommand_render(q);
return;
}
}
var url=q;
do {
if(q.length>7){
let c6 = q.charCodeAt(6);
if(47==c6){// '/'
let c5 = q.charCodeAt(5);
if(47==c5 && 58==q.charCodeAt(4))//http/file urls
break;
if(58==c5 && 47==q.charCodeAt(7))//https://
break;
}else if(q.startsWith("javascript:")){
tabs.children[iTab].executeJavaScript(q.substring(11),false);
return;
}
}
let iS = q.indexOf(' ');
if(iS<0){
if(q.length>5){
if(58==q.charCodeAt(5))
break;
}
if(q.indexOf('.')>0){
url = 'https://'+q;
break;
}
}
url = bang(q, iS);
}while(false);
tabs.children[iTab].src=url;
}
</script>
</head>
<body>
<form action="javascript:handleQuery(getQ())">
<datalist id="autoc"></datalist>
<input type="text" list="autoc" name=q style="width:100%" autofocus></form>
<div class="webviews">
<webview class="curWV" allowpopups></webview>
</div>
<script>
tabs = document.body.children[1];
document.addEventListener('keydown', keyPress);
</script>
</body></html>
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