deviantART easy scroll

Scrolls image to middle and allows horizontal scroll on mouse move event

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name        deviantART easy scroll
// @description Scrolls image to middle and allows horizontal scroll on mouse move event
// @namespace   https://greasyfork.org/users/2366-graenfur
// @author      Graenfur
// @include     *deviantart.com*
// @version     4
// @grant       none
// ==/UserScript==


function main() {
    var b = $('body'), //body
        ph = $('.dev-page-view'), //page holder
        ih = $('.dev-view-deviation'), //image holder
        sd = 0; //scrollable distance
    
    //force large images to be scrollable inline instead of making the whole page as wide as image
    $('<style>.view-mode-full_zoomed .dev-view-deviation{overflow-x:scroll;}</style>').appendTo('head');
    
    b.on("mouseup",".dev-view-deviation img", function (e) { if(e.button == 0){
        //refreshing variables
        ph = $('.dev-page-view');
        ih = $('.dev-view-deviation');
        
        var img = $(this), //image
            iw = img.attr("width"), //image width
            hasZoomIn = ph.hasClass("cursor-zoom-in"), //can be zoomed in
            hasZoomOut = ph.hasClass("cursor-zoom-out"); //can be zoomed out
            
        sd = iw - b.width(); //scrollable distance
        
        
        if(hasZoomIn && !hasZoomOut){console.log(img.offset().top);
            $('html, body, .dev-view-deviation').stop().animate({
                scrollTop:(img.offset().top),
                scrollLeft:sd/2 //scrolls to zoomed images middle
            },400,function(){
                if(ph.hasClass('view-mode-full_zoomed')){ //after full zoom
                    b.addClass('animated'); //signal that mousemove can add scrolling
                }
            });
        }else if(hasZoomOut){
            $('html, body, .dev-view-deviation').stop().animate({
                scrollTop:0,
                scrollLeft:0
            },400);
            b.removeClass('scrollable animated');
        }
    }});
    
    
    var mouseX = 0,
        nweMouseX = 0,
        oldMouseX = 0,
        sp = 0, //scroll position
        xp = 0; //x position
    
    b.on('mousemove','.dev-view-deviation',function(e){
        newMouseX = e.pageX;
        if(newMouseX != oldMouseX){
        	mouseX = newMouseX;
            oldMouseX = newMouseX;
        	mouseX += (mouseX-(b.width()/2))*0.3; //increases mousemove/scroll sensitivity closer to edges
        	if(b.hasClass('animated')){
            	b.addClass('scrollable'); //allows scrolling after image is zoomed
        	}
        }
    });
    
    //scroll easing loop
    var loop = setInterval(function(){
        if(b.hasClass('scrollable')){
            xp += (mouseX - xp) / 10; //easig
            sp = (xp/b.width())*sd; //converts mouse position to scroll position
            $('.dev-view-deviation').scrollLeft(sp);
        }else{
            xp = b.width()/2; //force scrolling to start from middle instead of left edge
        }
    }, 20);
    
}

// Inject our main script
var script = document.createElement('script');
script.type = "text/javascript";
script.textContent = '(' + main.toString() + ')();';
document.body.appendChild(script);