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drag2up.js
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drag2up.js
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function initialize(){
if(typeof console == 'undefined') console = {log:function(){},warn:function(){}};
if(!document){ /*console.warn('no document'); */return}
if(!window.top){ /*console.warn('no top', location.href); */return};
if(document.__drag2up){/*console.warn('already exists in this window');*/ return}
document.__drag2up = true;
/*
window.addEventListener('drag2upTestEvent', function(e){
e.preventDefault();
e.stopPropagation();
e.stopImmediatePropagation();
return false
}, true);
*/
var isDragging = false;
var dropTargets = [];
var lastDrag = 0;
var postMessageHeader = '!/__drag2up-$/!'; //crammed a bunch of random characters
var callbacks = {};
//instance ID. useful for debugging.
var iId = Math.random().toString(36).substr(2,3);
//console.log('initialized ',iId,' at', location.href);
function clearTargets(){
//console.log('clear targets');
//return;
isDragging = false;
for(var i = dropTargets.length; i--;){
if(dropTargets[i] && dropTargets[i].parentNode && dropTargets[i].hasDropped == false){
//TODO: move function declaration outside of loop for speed/mem
(function(target){
target.style.opacity = '0';
setTimeout(function(){
if(target.parentNode) target.parentNode.removeChild(target);
},500);
})(dropTargets[i]);
}
}
dropTargets = [];
}
// determines if an element can be droppable based on several conditions
function isDroppable(el){
//console.log('checking droppability', el);
if(!el) return false;
var tag = 'unknown', A;
if(el.offsetWidth * el.offsetHeight < 100) return false;
if(el.tagName && typeof el.tagName.toLowerCase == 'function') tag = el.tagName.toLowerCase();
//if(tag == 'div' && dropTargets.indexOf(el) != -1) return 3;
if(((tag == 'input' && el.type.toLowerCase() == 'text') || tag == 'textarea') && (el.disabled == false && el.readOnly == false)) A = 1;
if(el.isContentEditable && el.parentNode.isContentEditable == false) A = 2.5; //aaah! close your eyes! it's too hacky!
if(el.isContentEditable && tag == 'body') A = 2;
//structured this weird way because profiling shows this part is the slowest
if(A == 2){
return A;
}else if(A == 1 || A == 2.5){
//console.log('got close to soemthign');
//return true
var pos = findPos(el); //oh crap this is hacky
//for fixed positioned elements
var over_el = el.ownerDocument.elementFromPoint(pos[0]+4, pos[1]+4);
if(over_el == el) return ~~A;
if(over_el && over_el.tagName.toLowerCase() == 'label') return ~~A;
//for absolutely positioned elements
var over_mid = el.ownerDocument.elementFromPoint(pos[0]+4 - scrollX, pos[1]+4-scrollY);
if(over_mid == el) return ~~A;
if(over_mid && over_mid.tagName.toLowerCase() == 'label') return ~~A;
if((over_el && over_el.dropTarget) || (over_mid && over_mid.dropTarget)) return ~~A;
//console.log('booooooo', el, over_mid, over_el, pos, scrollX, scrollY);
}
return false;
}
//stolen from ppk
function findPos(obj) {
var curleft = curtop = 0;
do {
curleft += obj.offsetLeft;
curtop += obj.offsetTop;
} while (obj = obj.offsetParent);
return [curleft,curtop];
}
function propagateMessage(msg){
window.top && top.postMessage && window.top.postMessage(postMessageHeader + 'root_' + msg, '*');
//console.log('hey root', msg,window, window.top, window.parent);
}
function trickleMessage(msg){
window.top && top.postMessage && window.top.postMessage(postMessageHeader + 'trickle_' + msg, '*');
//console.log('trikling', window.top, window.top.postMessage);
}
var csx = 0, csy = 0, rsr = false;
function autoResetScroll(){
if(rsr == false){
csx = scrollX;
csy = scrollY;
resetScroll();
}
}
function resetScroll(){
if(isDragging){
//console.log('resttings crolling'+iId);
rsr = true;
if(csx != scrollX || csy != scrollY){
scrollTo(csx, csy);
}
setTimeout(resetScroll, 100);
}else{
rsr = false;
}
}
window.addEventListener('message', function(e){
if(e.data.substr(0, postMessageHeader.length) != postMessageHeader) return;
var data = e.data.substr(postMessageHeader.length);
//console.log("___"+data);
if(data.substr(0,7) == 'trickle'){
//propagate downwards
for(var i = 0; i < frames.length; i++){
if(frames[i]){
frames[i] && frames[i].postMessage && frames[i].postMessage(e.data, '*');
}else{
//bypass the weird stuff that content scripts do
var s = document.createElement('script');
s.innerHTML = "frames["+i+"] && frames["+i+"].postMessage && frames["+i+"].postMessage("+JSON.stringify(e.data)+", '*');";
document.documentElement.appendChild(s);
s.parentNode.removeChild(s);
}
}
var cmd = data.substr(0,18);
if(cmd == 'trickle_reactivate'){ //it should just be activate, but re seems like a good prefix to make them the same length
if(isDragging == false){
isDragging = true;
getTargets();
autoResetScroll();
}
}else if(cmd == 'trickle_deactivate'){
clearTargets();
}else if(cmd == 'trickle_docallback'){
var json = JSON.parse(data.substr(18))
var cb = callbacks[json.callback];
if(cb) cb(json);
}
}else if(data.substr(0, 4) == 'root'){
var cmd = data.substr(0,15);
if(cmd == 'root_reactivate'){
if(isDragging == false){
addSettingsDropper()
trickleMessage('reactivate');
}
//console.log(new Date - lastDrag);
lastDrag = (+new Date); //TODO; utilize the value that got passed
}else if(cmd == 'root_deactivate'){
var lastDeactivation = +new Date;
setTimeout(function(){
//console.log('check deact', lastDrag - lastDeactivation);
if(lastDrag < lastDeactivation){
trickleMessage('deactivate');
//console.warn('fuh reeelz!',lastDeactivation - lastDrag)
}
},300);
}else if(cmd == 'root_forcedkill'){ //woot, same length!
trickleMessage('deactivate');
}else if(cmd == 'root_background'){
var json = JSON.parse(data.substr(15));
try{
if(window.chrome && chrome.extension && chrome.extension.sendRequest){
chrome.extension.sendRequest(json, function(data){
trickleMessage('docallback'+JSON.stringify(data));
});
}else{
console.log('used postMessage trickle');
onMessage = function(msg) {
trickleMessage('docallback'+msg);
}
postMessage(JSON.stringify(json)); //TODO: make it more efficient. don't decode and reencode json
}
}catch(err){
console.log('could not transmit');
trickleMessage('docallback'+JSON.stringify({
callback: json.id,
url: 'error: could not send request to background page'
}))
}
}
}
}, true)
if(!(window.chrome && chrome.extension && chrome.extension.sendRequest)){
window.addEventListener('beforeunload', function(e){
isDragging = false; //firefox is weird.
}, true);
}
function insertLink(el, url, type){
console.log('insertLink',iId, el, url, type);
try{
el.focus();
}catch(err){}
try{
//*
var evt = el.ownerDocument.createEvent('MouseEvents');
evt.initMouseEvent('click', true, true, el.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
el.dispatchEvent(evt);
//*/
el.focus();
}catch(err){};
try{
el.select();
}catch(err){};
setTimeout(function(){
try{
el.focus()
}catch(err){};
},10);
setTimeout(function(){
try{el.focus()}catch(err){};
var elt = isDroppable(el); //get the type of drop mode
if(elt == 1){ //input
if(el.value.slice(-1) != ' ' && el.value != '') el.value += ' ';
console.log('input yay');
//simple little test to use bbcode insertion if it's something that looks like bbcode
if(/\[(quote|img|url|code)\]/i.test(document.body.innerHTML) || /bbc_|BBCode|bulletin board code/.test(document.body.innerHTML)){
if(type.indexOf('image/') == 0 && url.direct){
el.value += '[img]'+url.direct+'[/img]' + ' ';
}else{
el.value += '[url='+url.url+']'+(url.name||url.url)+'[/url]' + ' ';
}
}else if(/Markdown/i.test(document.body.innerHTML)){
if(type.indexOf('image/') == 0 && url.direct){
el.value += '!['+(url.name||url.url)+']('+url.direct+')' + ' ';
}else{
el.value += '['+(url.name||url.url)+']('+url.url+')' + ' ';
}
}else if(el.value.indexOf('<a') != -1 || el.value.indexOf('<'+'/') != -1){
if(type.indexOf('image/') == 0 && url.direct){
el.value += '<img src="' + url.url + '"> ';
}else{
el.value += '<a href="' + url.url + '">'+(url.name||url.url)+'</a> ';
}
}else{
el.value += url.url + ' ';
}
}else if(elt == 2){ //contentEditable
var xel = el;
var pel = xel.getElementsByTagName('p');
if(pel.length > 0){
xel = pel[pel.length -1];
}
if(el.ownerDocument.body.isContentEditable == true && url.direct && type.indexOf('image/') == 0){
var img = document.createElement('img');
img.src = url.direct;
xel.appendChild(img);
}else{
var a = document.createElement('a');
a.href = url.url;
a.innerText = url.name || url.url;
xel.appendChild(a);
}
el.appendChild(document.createTextNode(' ')); //add a space at the end
//links dont tend to work as well
//var span = document.createElement('span');
//span.innerText = data.url;
//el.appendChild(span);
}
},200);
}
function addSettingsDropper(){
console.log('showing magic thing');
var mask = document.createElement('div'); //this is what we're making!
document.body.appendChild(mask);
dropTargets.push(mask);
var opacity_normal = '0.32', opacity_hover = '0.82';
mask.style.opacity = opacity_normal;
mask.style.backgroundColor = "rgb(91,84,183)"; //a shade of orange
mask.style.position = 'fixed';
mask.style.zIndex = 9007199254740991;
mask.style.webkitTransition = 'opacity 0.5s ease'
mask.style.MozTransition = 'opacity 0.5s ease'
mask.style.textAlign = 'center';
mask.style.color = 'white';
mask.style.borderRadius = '5px';
mask.style.webkitBorderRadius = '5px';
mask.style.MozBorderRadius = '5px';
mask.style.fontFamily = 'sans-serif, arial, helvetica'
mask.innerHTML = 'drag2up <b>settings</b>';
mask.hasDropped = false;
mask.style.bottom = '20px';
mask.style.right = '20px';
mask.style.padding = '7px';
mask.style.paddingTop = '10px';
mask.style.paddingBottom = '10px';
mask.style.fontSize = '16px';
mask.addEventListener('dragenter', function(e){
mask.style.opacity = opacity_hover;
}, false);
mask.addEventListener('dragleave', function(e){
if(e.target.parentNode != mask) mask.style.opacity = opacity_normal;
}, false);
mask.addEventListener('dragover', function(e){
mask.style.opacity = opacity_hover;
if(isDragging) propagateMessage('reactivate');
e.preventDefault();
e.stopPropagation();
return false;
}, true);
mask.addEventListener('drop', function(e){
e.preventDefault();
e.stopPropagation();
setTimeout(function(){
propagateMessage('forcedkill');
},0);
propagateMessage('background'+JSON.stringify({
action: 'settings'
}));
}, true);
}
function renderTarget(el){
for(var i = dropTargets.length; i-- && dropTargets[i].dropTarget != el;){};
if(i != -1) return; //already rendered
if(!el || !el.parentNode) return;
var pos = findPos(el), width = el.offsetWidth, height = el.offsetHeight;
if(!width && !height) return; //no zero widther
//console.log('render drop target',iId, el);
var opacity_normal = '0.62', opacity_hover = '0.91';
var mask = document.createElement('div'); //this is what we're making!
mask.style.opacity = '0'; //set to zero initially, for nice fade in
document.body.appendChild(mask);
dropTargets.push(mask);
setTimeout(function(){ mask.style.opacity = opacity_normal;},10);
mask.style.backgroundColor = "rgb(50,150,50)"; //a shade of green
mask.dropTarget = el; //reference original element
mask.style.position = 'absolute';
var parent = el, cs = null;
try{
while(parent && parent != document && (cs = window.getComputedStyle(parent, null)) && cs.position != 'fixed'){
parent = parent.parentNode
};
if(cs && cs.position == 'fixed'){
mask.style.position = 'fixed';
}
}catch(err){}
mask.style.zIndex = 9007199254740991;
mask.style.webkitTransition = 'opacity 0.5s ease'
mask.style.MozTransition = 'opacity 0.5s ease'
mask.style.textAlign = 'center';
mask.style.color = 'white';
mask.style.borderRadius = '5px';
mask.style.webkitBorderRadius = '5px';
mask.style.MozBorderRadius = '5px';
mask.style.fontFamily = 'sans-serif, arial, helvetica'
mask.innerHTML = '<b>drop files</b> here';
mask.hasDropped = false;
mask.contentEditable = 'false'; //hey - everyone who is bored by waiting long durations can have fun editing it
//actually that was a really dumb idea. undid it.
//so apparently, Apple synces the blinky power light with human breathing which is more emotionally awesome
//so logically, this is totally what I'm going to do. It's going to blinky blinky with the pattern of breathing
//so you aren't annoyed by how slow imgur is at uploading a two megabyte image that you took in paris that
//totally looks like that scene from Inception.
//http://en.wikipedia.org/wiki/Respiratory_rate says that the human breathing rate is 12/60 hertz
//that means that you breathe once every five seconds on average
//and that means each half-breath is 2.5 seconds
//this was more important the last version when there wasnt the magical instant feature
var cx = pos[0] + width/2 , cy = pos[1] + height/2 ;
var pad = 5; //five pixel padding for normal thingsies
if(el.tagName.toLowerCase() == 'body'){
mask.style.position = 'fixed';
height = el.ownerDocument.documentElement.offsetHeight;
width = el.ownerDocument.documentElement.offsetWidth;
height = Math.min(height, innerHeight/2);
width = Math.min(width, innerWidth/2);
width = Math.min(200, width);
height = Math.min(80, height);
}
if(width * height > 32000){ //a random magic number. Basically, it's derived from twitter's whats happening box which is 482x56
//and thats close to 500x60 which is 30,000 but 32,000 feels nicer.
//here, the box is too big, so instead of covering it, you make a smaller one in the center
width = Math.min(200, width);
height = Math.min(80, height);
}
mask.style.left = Math.max(0,cx - width/2 - pad)+'px';
mask.style.top = Math.max(0,cy - height/2 - pad)+'px';
mask.style.width = width+'px';
mask.style.height = height+'px';
mask.style.padding = pad+'px';
mask.style.fontSize = '16px';
mask.addEventListener('dragenter', function(e){ mask.style.opacity = opacity_hover; }, false);
mask.addEventListener('dragleave', function(e){
if(e.target.parentNode != mask) mask.style.opacity = opacity_normal;
}, false);
mask.addEventListener('dragover', function(e){
mask.style.opacity = opacity_hover;
if(isDragging) propagateMessage('reactivate');
e.preventDefault();
e.stopPropagation();
e.stopPropagation();
return false;
}, true);
mask.addEventListener('drop', function(e){
function breathe(){
if(mask.parentNode){
mask.style.webkitTransition = 'opacity 2.5s ease'
mask.style.MozTransition = 'opacity 2.5s ease'
var opacity_breathe = "0.3"
mask.style.opacity = (mask.style.opacity == opacity_breathe)?opacity_normal:opacity_breathe;
setTimeout(breathe, 2500);
}
}
breathe();
console.log('file was dropped');
e.preventDefault();
e.stopPropagation();
console.log('drop event', +new Date);
var files = e.dataTransfer ? e.dataTransfer.files: [];
console.log(files.length);
var url, numleft = 0;
function uploadFile(file){
numleft++;
var cb = Math.random().toString(36).substr(3);
callbacks[cb] = function(data){
numleft--;
insertLink(el, data.url, file.type);
if(numleft == 0 && mask.parentNode){
mask.style.webkitTransition = 'opacity .3s ease'
mask.style.MozTransition = 'opacity .3s ease'
mask.style.opacity = '0';
setTimeout(function(){
mask.parentNode.removeChild(mask);
},300);
}
if(likelyleft > 1){ //this never gets updated
mask.innerHTML = '<b>uploading</b> '+numleft+' files';
}
delete callbacks[cb];
}
file.id = cb;
console.log('sent upload msg', +new Date);
propagateMessage('background'+JSON.stringify(file))
}
var likelyleft = 0;
if(files.length == 0 && (url = e.dataTransfer.getData('url'))){
var htmldata = e.dataTransfer.getData('text/html');
if(htmldata && htmldata.toLowerCase().indexOf('<img') != -1){
var xdiv = document.createElement('div');
xdiv.innerHTML = htmldata;
url = xdiv.getElementsByTagName('img')[0].src;
console.log('using new URL extracted from HTML ', url);
}
console.log('uploading URL', url);
console.log(e.dataTransfer.getData('text/html'));
uploadFile({url: url, name: url.replace(/^.+\/([^\?\#]+).*$/,'$1'), type: "image/png" /*more or less all iamges dropped this way for now are going to be images*/ });
likelyleft++;
}else if(files.length > 0){
console.log('uploading actual files', files.length);
for(var i = 0; i < files.length; i++){
var file = files[i];
console.log('found file', file);
//10MB is the new limit. why? it's yet another random number. drag2up crashed with a 20MB file.
if(file.size > 1024 * 1024 * 10 && !confirm('The file "'+file.name+'" is over 10MB. Are you sure you want to upload it?')) continue;
var url;
if(window.createObjectURL){
url = window.createObjectURL(file)
}else if(window.createBlobURL){
url = window.createBlobURL(file)
}else if(window.URL && window.URL.createObjectURL){
url = window.URL.createObjectURL(file)
}else if(window.webkitURL && window.webkitURL.createObjectURL){
url = window.webkitURL.createObjectURL(file)
}
if(url){
uploadFile({url: url, name: file.name, size: file.size, type: file.type});
likelyleft++;
}else{
(function(file){
var fr = new FileReader();
fr.onload = function(){
uploadFile({url: fr.result, name: file.name, size: file.size, type: file.type});
}
fr.readAsDataURL(file);
})(file)
likelyleft++;
}
}
}
if(likelyleft > 0){
console.log('yay its more than zero');
mask.hasDropped = true;
mask.style.backgroundColor = '#007fff';
if(likelyleft == 1){
mask.innerHTML = '<b>uploading</b> file';
}else{
mask.innerHTML = '<b>uploading</b> '+likelyleft+' files';
}
}else{
mask.parentNode.removeChild(mask);
}
setTimeout(function(){
propagateMessage('forcedkill');
var leaveEvent = document.createEvent('Event');
leaveEvent.initEvent('drop', true, true);
el.dispatchEvent(leaveEvent);
},0);
}, true);
}
function getTargets(){
if(document.body && document.body.isContentEditable){
renderTarget(document.body);
}else{
var all = document.getElementsByTagName('*');
for(var l = all.length; l--;){
if(isDroppable(all[l])) renderTarget(all[l]);
}
}
}
document.documentElement.addEventListener('dragenter', function(e){
if(!e.dataTransfer) return;
var types = Array.prototype.slice.call(e.dataTransfer.types, 0);
//console.log(types);
if(types.join('').indexOf('x-moz') != -1){ //terribly hacky mozilla stuff
//because mozilla text input dragging is application/x-moz-file,text/plain,Files
/*
if(types.join(',') == 'application/x-moz-file,text/x-moz-url,text/plain,Files'){
propagateMessage('reactivate');
}else if(types.join(',') == 'application/x-moz-file,Files'){
propagateMessage('reactivate')
}else if(types.join(',') == "application/x-moz-file,text/x-moz-url,Files"){
propagateMessage('reactivate');
}*/
if(types.indexOf('Files') != -1){
propagateMessage('reactivate');
}
}else{ //chrome
if(types.indexOf('Files') != -1 && types.indexOf('text/uri-list') == -1){
propagateMessage('reactivate');
}else if(types.indexOf('url') != -1 && types.indexOf('Files') == -1 && types.indexOf('text') == -1){ //images from other pages
propagateMessage('reactivate');
}/*else if(types.join(',') == 'text/html,text/uri-list,url'){ //images from other pages
propagateMessage('reactivate');
}*/
}
}, false);
document.documentElement.addEventListener('dragover', function(e){
//allow default to happen for normal drag/drops
isDragging && propagateMessage('reactivate');
}, false);
document.documentElement.addEventListener('mousemove', function(e){
//allow default to happen for normal drag/drops
isDragging && propagateMessage('deactivate');
}, false);
document.documentElement.addEventListener('dragleave', function(e){
//console.log('leaving dragging');
//go ahead and leave me
//i think i prefer to stay inside
isDragging && propagateMessage('deactivate');
}, false);
document.documentElement.addEventListener('mouseup', function(e){
if(isDragging) propagateMessage('forcedkill');
}, false);
/*
document.documentElement.addEventListener('drop', function(e){
console.log(e);
}, false);
*/
var lastFrameLength = 0;
window.setInterval(function(){
if(frames.length > lastFrameLength){
//console.log('found a new frame');
var init = function(){
for(var l = 0; l < frames.length; l++){
try{
//check to make sure drag2up isnt already loaded
if(!frames[l].document.__drag2up){
//yeah, sure this uses eval. And yes, eval is evil. sure whatever.
//don't be eval
//But I still dont think there's any better solution to this
//There is seriously no alternative to this.
//But it only runs in unprivledged space so there's effectively zero security risk
frames[l].eval("("+initialize.toString()+")()");
}
}catch(err){};
}
}
var script = document.createElement('script');
script.innerHTML = '(function(){'+initialize.toString()+';('+init.toString()+')();})()';
document.documentElement.appendChild(script);
script.parentNode.removeChild(script);
lastFrameLength = frames.length;
}
},1000)
}
initialize();