var req;
function init_ajax()
{
req = false;
if (window.XMLHttpRequest) {
// Mozilla/Safari
try {
req = new XMLHttpRequest();
} catch(e) {
req = false;
}
} else if (window.ActiveXObject) {
// IE/Windows
try {
req = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
req = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
req = false;
}
}
}
}
function find_width()
{
if (typeof(window.innerWidth) == 'number') {
// non-IE
return [window.innerWidth, window.innerHeight];
} else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
// IE 6+ in 'standards compliant mode'
return [document.documentElement.clientWidth, document.documentElement.clientHeight];
} else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {
// IE 4-compatible
return [document.body.clientWidth, document.body.clientHeight];
}
return [null,null];
}
/*
* pr0n can resize to any size we'd like, but we're much more likely
* to have this set of fixed-resolution screens cached, so to increase
* performance, we round down to the closest fit and use that. This
* function is a pessimal estimate of what thumbnail size we can _always_
* fit on the screen -- it's right if and only if all images are 4:3
* (and landscape). If individual size information is available, use
* pick_image_size, below.
*/
var fixed_sizes = [
[ 1600, 1200 ],
[ 1400, 1050 ],
[ 1280, 960 ],
[ 1024, 768 ],
[ 800, 600 ],
[ 640, 480 ],
[ 512, 384 ],
[ 320, 256 ],
[ 240, 192 ],
[ 120, 96 ],
[ 80, 64 ]
];
function max_image_size(screen_size)
{
var i;
for (i = 0; i < fixed_sizes.length; ++i) {
if (screen_size[0] >= fixed_sizes[i][0] && screen_size[1] >= fixed_sizes[i][1]) {
return fixed_sizes[i];
}
}
return [ 80, 64 ];
}
function pick_image_size(screen_size, image_size)
{
var i;
for (i = 0; i < fixed_sizes.length; ++i) {
// this is a duplicate of pr0n's resizing code, hope for no floating-point
// inaccuracies :-)
var thumbxres = fixed_sizes[i][0];
var thumbyres = fixed_sizes[i][1];
var width = image_size[0];
var height = image_size[1];
if (!(thumbxres >= width && thumbyres >= height)) {
var sfh = width / thumbxres;
var sfv = height / thumbyres;
if (sfh > sfv) {
width /= sfh;
height /= sfh;
} else {
width /= sfv;
height /= sfv;
}
width = Math.floor(width);
height = Math.floor(height);
}
if (screen_size[0] >= width && screen_size[1] >= height) {
// be sure _not_ to return a reference
return [ fixed_sizes[i][0], fixed_sizes[i][1], width, height ];
}
}
return [ 80, 64 ];
}
function display_image(width, height, evt, filename, element_id)
{
var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/" + global_infobox + filename;
var img = document.getElementById(element_id);
if (img !== null) {
img.src = "data:";
img.parentNode.removeChild(img);
}
img = document.createElement("img");
img.id = element_id;
img.alt = "";
if (img.src != url) {
img.src = url;
}
var main = document.getElementById("iehack");
main.appendChild(img);
return img;
}
function display_image_num(num, element_id)
{
var screen_size = find_width();
var adjusted_size;
if (global_image_list[num][2] == -1) {
// no size information, use our pessimal guess
adjusted_size = max_image_size(screen_size);
} else {
adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
}
var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
if (element_id == "image") {
// we want to shrink the box as much as possible if we know the true
// size of the image
center_image(num);
document.getElementById('linkbg1').href = global_bookmark_url_base + (num+1);
document.getElementById('linkbg2').href = global_bookmark_url_base + (num+1);
document.getElementById('linkbg3').href = global_bookmark_url_base + (num+1);
}
return img;
}
function prepare_preload(img, num)
{
// cancel any pending preload
var preload = document.getElementById("preload");
if (preload !== null) {
preload.src = "data:";
preload.parentNode.removeChild(preload);
}
// grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
// completeness first; should at least be _somewhat_ better
if (img.complete) {
display_image_num(num, "preload");
} else {
img.onload = function() { display_image_num(num, "preload"); };
}
}
function can_go_next()
{
return (global_image_num < global_image_list.length - 1);
}
function can_go_previous()
{
return (global_image_num > 0);
}
function set_opacity(id, amount)
{
var elem = document.getElementById(id);
if (typeof(elem.style.opacity) != 'undefined') { // W3C
elem.style.opacity = amount;
} else if (typeof(elem.style.mozOpacity) != 'undefined') { // older Mozilla
elem.style.mozOpacity = amount;
} else if (typeof(elem.style.filter) != 'undefined') { // IE
if (elem.style.filter.indexOf("alpha") == -1) {
// add an alpha filter if there isn't one already
if (elem.style.filter) {
elem.style.filter += " ";
} else {
elem.style.filter = "";
}
elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
} else {
// ugh? this seems to break in color index mode...
if (typeof(elem.filters) == 'unknown') {
elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
} else {
elem.filters.alpha.opacity = (amount * 100.0);
}
}
} else { // no alpha support
if (amount > 0.5) {
elem.style.visibility = "visible";
elem.style.zorder = 1;
} else {
elem.style.visibility = "hidden";
}
}
}
function center_image(num)
{
var screen_size = find_width();
var width, height;
if (global_image_list[num][2] == -1) {
// no size information, use our pessimal guess
var adjusted_size = max_image_size(screen_size);
width = adjusted_size[0];
height = adjusted_size[1];
} else {
// use the exact information
var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
width = adjusted_size[2];
height = adjusted_size[3];
}
// center the image on-screen
var main = document.getElementById("main");
main.style.position = "absolute";
main.style.left = (screen_size[0] - width) / 2 + "px";
main.style.top = (screen_size[1] - height) / 2 + "px";
main.style.width = width + "px";
main.style.height = height + "px";
main.style.lineHeight = height + "px";
}
function relayout()
{
var img = display_image_num(global_image_num, "image");
if (can_go_next()) {
prepare_preload(img, global_image_num + 1);
}
set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
set_opacity("next", can_go_next() ? 0.7 : 0.1);
set_opacity("close", 0.7);
}
function go_previous()
{
if (!can_go_previous()) {
return;
}
var img = display_image_num(--global_image_num, "image");
if (can_go_previous()) {
set_opacity("previous", 0.7);
prepare_preload(img, global_image_num - 1);
} else {
set_opacity("previous", 0.1);
}
set_opacity("next", can_go_next() ? 0.7 : 0.1);
}
function go_next()
{
if (!can_go_next()) {
return;
}
var img = display_image_num(++global_image_num, "image");
if (can_go_next()) {
set_opacity("next", 0.7);
prepare_preload(img, global_image_num + 1);
} else {
set_opacity("next", 0.1);
}
set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
}
function do_close()
{
window.location = global_return_url;
}
function draw_text(msg)
{
// remove any text we might have left
var text = document.getElementById("text");
if (text !== null) {
text.parentNode.removeChild(text);
}
text = document.createElement("p");
text.id = "text";
text.style.position = "absolute";
text.style.color = "white";
text.style.lineHeight = "24px";
text.style.font = "24px verdana, arial, sans-serif";
text.innerHTML = msg;
var main = document.getElementById("main");
main.appendChild(text);
text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
}
function fade_text(opacity)
{
set_opacity("text", opacity);
if (opacity > 0.0) {
opacity -= 0.03;
if (opacity < 0.0) {
opacity = 0.0;
}
setTimeout("fade_text(" + opacity + ")", 30);
} else {
var text = document.getElementById("text");
if (text !== null) {
text.parentNode.removeChild(text);
}
}
}
function select_image(evt, filename)
{
if (!req) {
return;
}
draw_text("Selecting " + filename + "...");
req.open("POST", "http://" + global_vhost + "/select", false);
req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
req.send("mode=single&event=" + evt + "&filename=" + filename);
setTimeout("fade_text(0.99)", 30);
}
function key_down(which)
{
if (which == 39) { // right
if (can_go_next()) {
set_opacity("next", 0.99);
}
} else if (which == 37) { // left
if (can_go_previous()) {
set_opacity("previous", 0.99);
}
} else if (which == 27) { // escape
set_opacity("close", 0.99);
}
}
function key_up(which) {
if (which == 39) { // right
if (can_go_next()) {
set_opacity("next", 0.7);
go_next();
}
} else if (which == 37) { // left
if (can_go_previous()) {
set_opacity("previous", 0.7);
go_previous();
}
} else if (which == 27) { // escape
set_opacity("close", 0.7);
do_close();
} else if (which == 32 && global_select) { // space
select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1]);
}
}
// enable the horrible horrible IE PNG hack
function ie_png_hack()
{
var vstr = navigator.appVersion.split("MSIE");
var v = parseFloat(vstr[1]);
if (v >= 5.5 && v < 7.0 && document.body.filters) {
var next = document.getElementById("next");
next.outerHTML = "";
var previous = document.getElementById("previous");
previous.outerHTML = "";
var close = document.getElementById("close");
close.outerHTML = "";
}
}