消除划动动画 可设置划动倍率和更新间隔 支持手势缩放和双击复位
目前為
// ==UserScript==
// @name 墨水屏电纸书划动优化
// @namespace cc.cxuan.books
// @version 1.28
// @description 消除划动动画 可设置划动倍率和更新间隔 支持手势缩放和双击复位
// @match *://*/*
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @run-at document-end
// @noframes
// @license MIT
// @author cxuan.cc
// ==/UserScript==
(function(){
// 设置项
let mx = GM_getValue('multiplierX', 5),
my = GM_getValue('multiplierY', 2),
intervalSec = GM_getValue('interval', 0),
enableZoom = GM_getValue('enableZoom', true);
GM_registerMenuCommand(`设置X轴移动倍率（当前 ${mx}）`, ()=>{
let v = parseFloat(prompt('X 轴滑动倍率:', mx));
if(!isNaN(v)){ GM_setValue('multiplierX', mx=v); location.reload(); }
});
GM_registerMenuCommand(`设置Y轴移动倍率（当前 ${my}）`, ()=>{
let v = parseFloat(prompt('Y 轴滑动倍率:', my));
if(!isNaN(v)){ GM_setValue('multiplierY', my=v); location.reload(); }
});
GM_registerMenuCommand(`设置更新间隔（当前 ${intervalSec}s）`, ()=>{
let v = parseFloat(prompt('更新间隔（秒，0=仅松手时刷新）:', intervalSec));
if(!isNaN(v)){ GM_setValue('interval', intervalSec=v); location.reload(); }
});
GM_registerMenuCommand(`切换双指放大/双击复位（当前 ${enableZoom?'开':'关'}）`, ()=>{
GM_setValue('enableZoom', enableZoom=!enableZoom);
location.reload();
});
// 准备动态 meta viewport
let meta = document.querySelector('meta[name=viewport]');
if(!meta){
meta = document.createElement('meta');
meta.name = 'viewport';
document.head.appendChild(meta);
}
const originalMeta = meta.content;
const m1 = /initial-scale=([0-9.]+)/.exec(originalMeta);
const defaultScale = m1 ? parseFloat(m1[1]) : 1;
let currentScale = defaultScale, pinch = null;
function updateMeta(s){
meta.content = `width=device-width, initial-scale=${s}, maximum-scale=10, user-scalable=yes`;
}
// 滑动逻辑
const touchMap = {},
periodicUpdate = ()=>{
Object.values(touchMap).forEach(info=>{
if(info.cx==null||info.cy==null) return;
let tdX=(info.sx-info.cx)*mx,
tdY=(info.sy-info.cy)*my,
dX=tdX-(info.lastDx||0),
dY=tdY-(info.lastDy||0);
if(dX) info.el.scrollLeft+=dX;
if(dY) info.el.scrollTop+=dY;
info.lastDx=tdX; info.lastDy=tdY;
});
};
let timerId = null;
function startTimer(){
if(intervalSec>0 && !timerId)
timerId = setInterval(periodicUpdate, intervalSec*1000);
}
function stopTimer(){
if(timerId){ clearInterval(timerId); timerId = null; }
}
document.addEventListener('touchstart', e=>{
// 双指缩放
if(enableZoom && e.touches.length===2){
let [t1,t2] = e.touches,
d = Math.hypot(t2.clientX-t1.clientX, t2.clientY-t1.clientY);
pinch = { initialDist: d, initialScale: currentScale };
e.preventDefault(); return;
}
if(e.touches.length>1) return;
for(let t of e.changedTouches){
let el = t.target;
while(el && el!==document){
let s = getComputedStyle(el),
canY = el.scrollHeight>el.clientHeight && /auto|scroll/.test(s.overflowY),
canX = el.scrollWidth>el.clientWidth && /auto|scroll/.test(s.overflowX);
if(canY||canX) break;
el = el.parentNode;
}
if(!el || el===document) el = document.scrollingElement||document.documentElement;
touchMap[t.identifier] = {
sx:t.clientX, sy:t.clientY,
cx:t.clientX, cy:t.clientY,
el, lastDx:0, lastDy:0
};
}
startTimer();
}, { passive:false });
document.addEventListener('touchmove', e=>{
if(pinch){
let [t1,t2] = e.touches,
d = Math.hypot(t2.clientX-t1.clientX, t2.clientY-t1.clientY),
sc = pinch.initialScale * (d / pinch.initialDist);
currentScale = parseFloat(sc.toFixed(2));
updateMeta(currentScale);
e.preventDefault(); return;
}
if(e.touches.length>1) return;
let doPrevent = false;
for(let t of e.changedTouches){
let info = touchMap[t.identifier];
if(!info) continue;
info.cx = t.clientX; info.cy = t.clientY;
if(!(info.el === (document.scrollingElement||document.documentElement)
&& info.el.scrollTop===0
&& t.clientY-info.sy>0)) doPrevent = true;
}
if(doPrevent) e.preventDefault();
}, { passive:false });
function finishTouch(e){
if(pinch && e.touches.length<2){
pinch = null; return;
}
if(e.touches.length>1) return;
for(let t of e.changedTouches){
let info = touchMap[t.identifier];
if(!info) continue;
if(intervalSec===0){
let dx=(info.sx-t.clientX)*mx,
dy=(info.sy-t.clientY)*my;
info.el.scrollLeft+=dx;
info.el.scrollTop+=dy;
} else {
info.cx = t.clientX;
info.cy = t.clientY;
periodicUpdate();
}
delete touchMap[t.identifier];
}
if(!Object.keys(touchMap).length) stopTimer();
}
document.addEventListener('touchend', finishTouch, { passive:false });
document.addEventListener('touchcancel', finishTouch, { passive:false });
// 双击复位
let lastTap = 0;
document.addEventListener('touchend', e=>{
if(!enableZoom) return;
if(e.touches.length===0 && e.changedTouches.length===1){
let now = Date.now();
if(now - lastTap < 300){
let de = document.scrollingElement||document.documentElement,
lx = de.scrollLeft, ly = de.scrollTop;
currentScale = defaultScale;
updateMeta(currentScale);
de.scrollLeft = lx; de.scrollTop = ly;
}
lastTap = now;
}
}, { passive:false });
})();