Image viewer
当前为
// ==UserScript==
// @name Image Viewer
// @namespace https://gist.github.com/bradenbest/04bd0fc2d57ec650449f
// @version 1.0.0
// @description Image viewer
// @copyright 2014 - present Braden Best
// ==/UserScript==
/*
* Web image viewer script by Braden Best
* To use:
* inject this script into any page, and RIGHT-CLICK on the image you want to view full-size
* while the image is "open", you can drag it around to pan instead of scrolling
* There is a close button, and a full URL link above the image
* You can press Esc to close the image without the need for clicking the close button
* Special thanks to Cyberdevil for providing suggestions
* Escape key
* Provide Direct URL to image
* image is draggable
* Don't let it interfere with default click events
*/
(function(){
function push(url){
var img = document.createElement('img'),
img_helper = document.createElement('div');
// Image
img.src = url;
img.style.position = 'absolute';
img.style.left = '0px';
img.style.top = '60px';
img.style.zIndex = '1000000'; // this is to push it above everything else, so the NG navbar doesn't float over it.
img.className = 'img_viewer';
img.draggable = 'false';
img.dragging = 0;
img.mousepos = [0,0];
// Image helper
img_helper.innerHTML = "Click here to close image<hr><a target=\"_blank\" href=\"" + url + "\">Direct URL</a>";
img_helper.style.position = 'absolute';
img_helper.style.left = '0px';
img_helper.style.top = '0px';
img_helper.style.margin = '0';
img_helper.style.padding = '5px 0';
img_helper.style.width = '100%';
img_helper.style.height='50px';
img_helper.style.background = '#fff';
img_helper.style.color = '#000';
img_helper.style.fontSize = '12px';
img_helper.style.textAlign = 'center';
img_helper.style.zIndex = '2147483647'; // The absolute maximum
img_helper.className = 'img_viewer';
// append to body
document.body.appendChild(img);
document.body.appendChild(img_helper);
document.body.scrollTop = 0;
// helper on-click
img_helper.onclick = function(){
document.body.removeChild(img);
document.body.removeChild(img_helper);
img_helper.onclick = null;
}
img.onmousedown = function(evt){
this.dragging = 1;
this.mousepos[0] = (evt.clientX || evt.pageX);
this.mousepos[1] = (evt.clientY || evt.pageY);
}
img.onmouseup = function(evt){
this.dragging = 0;
}
img.onmousemove = function(evt){ // Hoo boy, that was pretty difficult to figure out
if(this.dragging){
lastX = this.mousepos[0];
curX = (evt.clientX || evt.pageX);
lastY = this.mousepos[1];
curY = (evt.clientY || evt.pageY);
if(!(lastX == curX && lastY == curY)){
console.log("mouse has moved")
if(curX > lastX){
this.style.left = (parseInt(this.style.left) + (curX - lastX)) + 'px';
}
if(curX < lastX){
this.style.left = (parseInt(this.style.left) - (lastX - curX)) + 'px';
}
if(curY > lastY){
this.style.top = (parseInt(this.style.top) + (curY - lastY)) + 'px';
}
if(curY < lastY){
this.style.top = (parseInt(this.style.top) - (lastY - curY)) + 'px';
}
}
this.mousepos[0] = curX;
this.mousepos[1] = curY;
}
return false;
}
}
function clear(){
var imgs = document.querySelectorAll('.img_viewer');
if(imgs[0]) {
for(var i = 0; i < imgs.length; i++){
document.body.removeChild(imgs[i]);
}
} else {
console.log("No images generated by this script were found");
}
}
var imgs = document.querySelectorAll('img[src]'), i;
if(imgs[0]){
for(i = 0; i < imgs.length; i++){
if(imgs[i].src){
imgs[i].oncontextmenu = function(){
push(this.src);
return false;
}
}
}
} else {
console.log("Something has gone wrong!");
}
document.body.onkeydown = function(evt){
if(evt.keyCode == 27){ // Escape key
clear();
}
}
})();