☰

Image Viewer

inject this script into any page, and RIGHT-CLICK on the image you want to view full-size

当前为 2014-05-04 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name       Image Viewer
  3. // @namespace  https://gist.github.com/bradenbest/04bd0fc2d57ec650449f
  4. // @version    1.4.3
  5. // @description  inject this script into any page, and RIGHT-CLICK on the image you want to view full-size
  6. // @copyright  2014 - present, Braden Best
  7. // ==/UserScript==
  8.  
  9. (function initialize(init){
  10.   var init = init || 0;
  11.   function push(url){
  12.     var img = document.createElement('img'),
  13.         img_helper = document.createElement('div'),
  14.         img_helper_link = document.createElement('a');
  15.     // Image
  16.     img.src = url;
  17.     img.style.position = 'absolute';
  18.     img.style.left = '0px';
  19.     img.style.top  = (document.body.scrollTop) + 'px';
  20.     img.style.zIndex = '2147483647'; // this is to push it above everything else, so the NG navbar doesn't float over it.
  21.     img.className = 'img_viewer';
  22.     img.draggable = 'false';
  23.     img.dragging = 0;
  24.     img.mousepos = [0,0];
  25.     // Image helper
  26.     img_helper.innerHTML = "Click here to close image";
  27.     img_helper.style.position = 'fixed';
  28.     img_helper.style.left = '0px';
  29.     img_helper.style.top  = '0px';
  30.     img_helper.style.margin = '0';
  31.     img_helper.style.padding = '5px 0';
  32.     img_helper.style.width = '100%';
  33.     img_helper.style.height='50px';
  34.     img_helper.style.background = '#fff';
  35.     img_helper.style.borderBottom = '1px solid #ccc';
  36.     img_helper.style.color = '#000';
  37.     img_helper.style.fontSize = '12px';
  38.     img_helper.style.textAlign = 'center';
  39.     img_helper.style.zIndex = '2147483647'; // The absolute maximum
  40.     img_helper.className = 'img_viewer';
  41.     // Image helper link
  42.     img_helper_link.innerText = 'Direct URL';
  43.     img_helper_link.href = url;
  44.     img_helper_link.target = '_blank';
  45.     img_helper_link.style.margin = '0';
  46.     img_helper_link.style.padding = '0';
  47.     img_helper_link.style.background = '#fff';
  48.     img_helper_link.style.borderBottom = '1px solid #ccc';
  49.     img_helper_link.style.display = 'block';
  50.     img_helper_link.style.width = '100%';
  51.     img_helper_link.style.height = '20px';
  52.     img_helper_link.style.position = 'fixed';
  53.     img_helper_link.style.left = '0';
  54.     img_helper_link.style.top = '50px';
  55.     img_helper_link.style.fontSize = '12px';
  56.     img_helper_link.style.textAlign = 'center';
  57.     img_helper_link.style.zIndex = '2147483647';
  58.     img_helper_link.className = 'img_viewer';
  59.     // append to body
  60.     document.body.appendChild(img_helper);
  61.     document.body.appendChild(img_helper_link);
  62.     document.body.appendChild(img);
  63.     // helper on-click
  64.     img_helper.onclick = function(){
  65.       document.body.removeChild(img);
  66.       document.body.removeChild(img_helper);
  67.       document.body.removeChild(img_helper_link);
  68.     }
  69.     img.onmousedown = function(evt){
  70.       this.dragging = 1;
  71.       this.mousepos[0] = (evt.clientX || evt.pageX);
  72.       this.mousepos[1] = (evt.clientY || evt.pageY);
  73.     }
  74.     img.onmouseup = function(evt){
  75.       this.dragging = 0;
  76.     }
  77.     img.onmousemove = function(evt){ // Hoo boy, that was pretty difficult to figure out
  78.       if(this.dragging){
  79.         lastX = this.mousepos[0];
  80.         curX = (evt.clientX || evt.pageX);
  81.         lastY = this.mousepos[1];
  82.         curY = (evt.clientY || evt.pageY);
  83.         if(!(lastX == curX && lastY == curY)){
  84.           console.log("mouse has moved");
  85.           if(curX > lastX){
  86.             this.style.left = (parseInt(this.style.left) + (curX - lastX)) + 'px';
  87.           }
  88.           if(curX < lastX){
  89.             this.style.left = (parseInt(this.style.left) - (lastX - curX)) + 'px';
  90.           }
  91.           if(curY > lastY){
  92.             this.style.top = (parseInt(this.style.top) + (curY - lastY)) + 'px';
  93.           }
  94.           if(curY < lastY){
  95.             this.style.top = (parseInt(this.style.top) - (lastY - curY)) + 'px';
  96.           }
  97.         }
  98.         this.mousepos[0] = curX;
  99.         this.mousepos[1] = curY;
  100.       }
  101.       return false;
  102.     }
  103.   }
  104.  
  105.   function clear(){
  106.     var imgs = document.querySelectorAll('.img_viewer');
  107.     if(imgs[0]) {
  108.       for(var i = 0; i < imgs.length; i++){
  109.         document.body.removeChild(imgs[i]);
  110.       }
  111.     } else {
  112.       console.log("No images generated by this script were found");
  113.     }
  114.   }
  115.  
  116.   var imgs = document.querySelectorAll('img[src]'), i;
  117.   if(imgs[0]){
  118.     for(i = 0; i < imgs.length; i++){
  119.       if(imgs[i].src){
  120.         imgs[i].oncontextmenu = function(){
  121.           push(this.src);
  122.           return false;
  123.         }
  124.       }
  125.     }
  126.   } else {
  127.     console.log("Something has gone wrong!");
  128.   }
  129.   document.body.onkeydown = function(evt){
  130.     if(evt.keyCode == 27){ // Escape key
  131.       clear();
  132.     }
  133.     if(evt.keyCode == 17){ // Ctrl
  134.       //clear();
  135.       initialize(1);
  136.     }
  137.   }
  138.   if(!init){
  139.     console.log("Image Viewer successfully started up!");
  140.     console.log("Try right-clicking an image");
  141.   }else{
  142.     console.log("Queue updated");
  143.   }
  144. })();

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