By Kite
—
Last update
Apr 14, 2008
—
Installed
17,888 times.
// ==UserScript==
// @name Craigslist image preview 2
// @description View craigslist image previews
// @include http://*.craigslist.org/*
// @include http://*.craigslist.ca/*
// @exclude http://*.craigslist.org/
// @exclude http://*.craigslist.ca/
// ==/UserScript==
/* This is a reworking of "Craigslist image preview" by Jeffrey Palm.
* I fixed 3 bugs & added 2 improvements.
* Bug fix #1 (missing thumbnails): the image preview didn't appear if the original img
* tag in the ad has any attribute (style, border, etc.) before the source attribute.
* Bug fix #2 (small pics blown up): Small images were enlarged.
* Bug fix #3 (internationalize): Now works in Canada too.
* Improvement #1 (small-pics clutter): filter out small images, so that they don't even appear
* Improvement #2 (enlarge thumbnail on mouseover): up to 550x600 pixels.
* All my changes are shown with a VERSION 2 CODE comment.
*/
// --------------------------------------------------
// misc
// --------------------------------------------------
var PREFIX = "*cs*.";
var SIZE_PARAM = "size";
var KEEP_ASPECT_RATIO_PARAM = "aspect.ratio";
var CLASS = "_c";
var size = 0;
var mouseMoves = 0;
var lastImg;
function setValue(key,val) {
GM_setValue(PREFIX + key,val);
return val;
}
function getValue(key,defaultValue) {
var res = GM_getValue(PREFIX + key);
if (!res) res = defaultValue;
return res;
}
/**
* String[tag] (Node) -> Node
* Creates a new node.
*/
function $n(tag,on) {
var e = document.createElement(tag);
if (on) on.appendChild(e);
return e;
}
/**
* String[text] (Node) -> Node
* Creates a new text node.
*/
function $t(text,on) {
var e = document.createTextNode(text);
if (on) on.appendChild(e);
return e;
}
/**
* Node Node -> Void
* Inserts newNode before target.
* http://lists.xml.org/archives/xml-dev/200201/msg00873.html
*/
function insertBefore(newNode,target) {
var parent = target.parentNode;
var refChild = target; //target.nextSibling;
if(refChild) parent.insertBefore(newNode, refChild);
else parent.appendChild(newNode);
}
var cnt=0;
function newFunction(_a) {
var a = _a;
return function(details) {
if (details.responseText) {
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: change reg exp below
// if (m = details.responseText.match(/img src=\"([^\"]+)\"/gi)) {
if (m = details.responseText.match(/<img ([^>]+)>/gi)) {
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Go thru the links
// div will hold the new div below the links parent
//
var div;
for (j=0; j<m.length; j++) {
s = m[j];
if (!s) continue;
//
// basically a hack, but I thought this would return
// an array
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: change replace methods to split methods below
// s = s.replace(/img src=/g,"");
// s = s.replace(/\"/g,"");
s = s.split('src="')[1];
s = s.split('"')[0];
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// For the first time create the div to hold the links
//
if (!div) {
var d = $n("div",a.parentNode);
var br = $t(" ",a.parentNode);
div = $n("div",a.parentNode);
}
//
// Create the link and image and add them
//
var newA = $n("a",div);
var img = $n("img",newA);
img.className = CLASS;
img.src = s;
//
// 1.5: Don't change the height if we're keeping the aspect ratio
//
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: changed width, height to maxWidth, maxHeight below
if (!keepAspectRatio) {
img.style.maxWidth = size + "px";
}
img.style.maxHeight = size + "px";
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
$t(" ",div);
newA.href = s;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: filter out small images, add mouseover blowups
img.addEventListener("load", function() {
if (this.height < size) {
this.parentNode.parentNode.removeChild(this.parentNode);
}
},true);
img.addEventListener("mousemove", function() {
mouseMoves += 1;
},true);
img.addEventListener("mouseover", function() {
mouseMoves = 0;
if (lastImg) {
lastImg.style.maxHeight = size + "px";
lastImg = null;
}
this.style.maxHeight = 550 + "px";
if (!keepAspectRatio) {
this.style.maxWidth = 600 + "px";
}
},true);
img.addEventListener("mouseout", function() {
if (mouseMoves > 2) {
this.style.maxHeight = size + "px";
if (!keepAspectRatio) {
this.style.maxWidth = size + "px";
}
}
else lastImg = this;
},true);
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}
}
}
};
}
function addLinkAtTop() {
var span = $n("span");
span.style.verticalAlign = "middle";
$t("change size: ",span);
var sel = $n("select",span);
for (var i=10; i<=300; i += 10) {
var opt = $n("option",sel);
opt.value = i;
if (i == size) opt.selected = true;
opt.innerHTML = i;
}
sel.addEventListener("change",function() {
var v = sel.value;
size = setValue(SIZE_PARAM,v);
changeSizes();
},true);
$t(" keep aspect ratio: ",span);
var check = $n("input",span);
check.type = "checkbox";
if (keepAspectRatio) check.checked = "1";
check.addEventListener("change",function() {
var v = check.checked;
keepAspectRatio = setValue(KEEP_ASPECT_RATIO_PARAM,v);
changeSizes();
},true);
var tab = document.getElementById("topbar");
if (!tab) {
tab = document.getElementsByTagName("table")[0];
}
tr = $n("tr",tab);
td = $n("td",tab);
td.appendChild(span);
tab.insertBefore(tr,tab.firstChild);
}
function changeSizes() {
var imgs = document.getElementsByTagName("img");
for (var i in imgs) {
var img = imgs[i];
if (img.className != CLASS) continue;
//
// 1.5: Don't change the height if we're keeping the aspect ratio
//
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: change width, height to maxWidth, maxHeight below
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if (!keepAspectRatio) {
img.style.maxWidth = size + "px";
}
img.style.maxHeight = size + "px";
}
}
function showImages() {
//
// find all the links to listings and display the images
//
links = document.getElementsByTagName("a");
for (i=0; i<links.length; i++) {
link = links[i];
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VERSION 2 CODE: remove "org" below, so that it works in Canada too (.ca)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if (link.href && link.href.match(/.*craigslist.*\/\d+\.html$/)) {
GM_xmlhttpRequest({
method:"GET",
url: link.href,
headers:{
"User-Agent": "monkeyagent",
"Accept":"text/html,text/monkey,text/xml,text/plain",
},
onload: newFunction(link)
});
}
}
}
function main() {
size = getValue(SIZE_PARAM,100);
keepAspectRatio = getValue(KEEP_ASPECT_RATIO_PARAM,true);
addLinkAtTop();
showImages();
}
try {main();} catch (e) {}
