+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 - 42];
+ } 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.
+ */
+function reduce_to_fixed_width(size)
+{
+ var fixed_sizes = [
+ [ 1280, 960 ],
+ [ 1024, 768 ],
+ [ 800, 600 ],
+ [ 640, 480 ],
+ [ 512, 384 ],
+ [ 320, 256 ],
+ [ 240, 192 ],
+ [ 120, 96 ],
+ [ 80, 64 ]
+ ];
+ for (i = 0; i < fixed_sizes.length; ++i) {
+ if (size[0] >= fixed_sizes[i][0] && size[1] >= fixed_sizes[i][1])
+ return fixed_sizes[i];
+ }
+ return [ 80, 64 ];
+}
+
+function display_image(width, height, evt, filename, element_id)
+{
+ var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/" + filename;
+ var img = document.getElementById(element_id);
+ if (img != null) {
+ img.src = "";
+ 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("main");
+ main.appendChild(img);
+
+ return img;
+}
+
+function prepare_preload(img, width, height, evt, filename)
+{
+ // cancel any pending preload
+ var preload = document.getElementById("preload");
+ if (preload != null) {
+ preload.src = "";
+ preload.parentNode.removeChild(preload);
+ }
+
+// img.onload = function() { display_image(width, height, evt, filename, "preload"); }
+ img.onload = "display_image(" + width + "," + height + ",\"" + evt + "\",\"" + filename + "\",\"preload\");";
+}
+
+function relayout()
+{
+ var size = find_width();
+ var adjusted_size = reduce_to_fixed_width(size);
+
+ var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
+ if (can_go_next()) {
+ prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num + 1]);
+ }
+
+ // center the image on-screen
+ var main = document.getElementById("main");
+ main.style.position = "absolute";
+ main.style.left = (size[0] - adjusted_size[0]) / 2 + "px";
+ main.style.top = (size[1] - adjusted_size[1]) / 2 + "px";
+ main.style.width = adjusted_size[0] + "px";
+ main.style.height = adjusted_size[1] + "px";
+ main.style.lineHeight = adjusted_size[1] + "px";
+ if (document.all) { // IE-specific
+ main.style.fontSize = adjusted_size[1] + "px";
+ }
+
+ set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
+ set_opacity("next", can_go_next() ? 0.7 : 0.1);
+}
+
+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 {
+ 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 can_go_previous()
+{
+ return (global_image_num > 0);
+}
+
+function go_previous()
+{
+ if (!can_go_previous())
+ return;
+
+ --global_image_num;
+
+ var adjusted_size = reduce_to_fixed_width(find_width());
+
+ var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
+ if (can_go_previous()) {
+ set_opacity("previous", 0.7);
+ prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num - 1]);
+ } else {
+ set_opacity("previous", 0.1);
+ }
+ set_opacity("next", can_go_next() ? 0.7 : 0.1);
+}
+
+function can_go_next()
+{
+ return (global_image_num < global_image_list.length - 1);
+}
+
+function go_next()
+{
+ if (!can_go_next())
+ return;
+
+ ++global_image_num;
+
+ var adjusted_size = reduce_to_fixed_width(find_width());
+
+ var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
+ if (can_go_next()) {
+ set_opacity("next", 0.7);
+ prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num + 1]);
+ } else {
+ set_opacity("next", 0.1);
+ }
+ set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
+}
+
+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);
+ }
+ }
+}
+
+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();
+ }
+ }
+}
+
+// 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 = "<span id=\"next\" style=\"display: inline-block; position: absolute; bottom: 0px; right: 0px; width: 50px; height: 50px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + next.src + "')\" onmousedown=\"if (can_go_next()) set_opacity('next', 1.0)\" onmouseup=\"if (can_go_next()) { set_opacity('next', 0.7); go_next(); }\" onmouseout=\"if (can_go_next()) { set_opacity('next', 0.7); }\" />";
+
+ var previous = document.getElementById("previous");
+ previous.outerHTML = "<span id=\"previous\" style=\"display: inline-block; position: absolute; bottom: 0px; right: 0px; width: 50px; height: 50px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + previous.src + "')\" onmousedown=\"if (can_go_previous()) set_opacity('previous', 1.0)\" onmouseup=\"if (can_go_previous()) { set_opacity('previous', 0.7); go_previous(); }\" onmouseout=\"if (can_go_previous()) { set_opacity('previous', 0.7); }\" />";
+ }
+}
projects / pr0n / commitdiff
