5 req = new XMLHttpRequest();
11 return [window.innerWidth * dpr, window.innerHeight * dpr];
16 return window.devicePixelRatio || 1;
20 * pr0n can resize to any size we'd like, but we're much more likely
21 * to have this set of fixed-resolution screens cached, so to increase
22 * performance, we round down to the closest fit and use that. This
23 * function is a pessimal estimate of what thumbnail size we can _always_
24 * fit on the screen -- it's right if and only if all images are 4:3
25 * (and landscape). If individual size information is available, use
26 * pick_image_size, below.
45 function max_image_size(screen_size)
48 for (i = 0; i < fixed_sizes.length; ++i) {
49 if (screen_size[0] >= fixed_sizes[i][0] && screen_size[1] >= fixed_sizes[i][1]) {
50 return fixed_sizes[i];
56 function pick_image_size(screen_size, image_size)
59 for (i = 0; i < fixed_sizes.length; ++i) {
60 // this is a duplicate of pr0n's resizing code, hope for no floating-point
62 var thumbxres = fixed_sizes[i][0];
63 var thumbyres = fixed_sizes[i][1];
64 var width = image_size[0];
65 var height = image_size[1];
67 if (!(thumbxres >= width && thumbyres >= height)) {
68 var sfh = width / thumbxres;
69 var sfv = height / thumbyres;
77 width = Math.floor(width);
78 height = Math.floor(height);
81 if (screen_size[0] >= width && screen_size[1] >= height) {
82 // be sure _not_ to return a reference
83 return [ fixed_sizes[i][0], fixed_sizes[i][1], width, height ];
89 function replace_image_element(url, element_id, parent_node)
91 var img = document.getElementById(element_id);
93 if (img.src === url) {
96 img.parentNode.removeChild(img);
99 img = document.createElement("img");
103 parent_node.appendChild(img);
107 function rename_element(old_name, new_name)
109 // Remove any element that's in the way.
110 var elem = document.getElementById(new_name);
112 elem.parentNode.removeChild(elem);
115 elem = document.getElementById(old_name);
122 function display_image(width, height, evt, filename, element_id)
124 var url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/" + filename;
125 var main = document.getElementById("iehack");
126 var preload = document.getElementById("preload");
127 var dpr = find_dpr();
129 // See if we have a preload going on that we can reuse.
130 if (element_id == "image" && preload !== null && preload.src == url) {
131 rename_element("preload_box", "image_box");
132 img = rename_element("preload", "image");
134 img = replace_image_element(url, element_id, main);
136 img.style.position = "absolute";
137 img.style.left = "0px";
138 img.style.top = "0px";
139 img.style.transformOrigin = "top left";
140 img.style.transform = "scale(" + (1.0 / dpr) + ")";
142 // Update the "download original" link.
143 var original_url = window.location.origin + "/" + evt + "/original/" + filename;
144 document.getElementById("origdownload").href = original_url;
146 if (global_infobox) {
149 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
151 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "@" + dpr.toFixed(2) + "/box/" + filename;
153 var boximg = replace_image_element(url, element_id + "_box", main);
155 boximg.style.position = "absolute";
156 boximg.style.left = "0px";
157 boximg.style.bottom = "-1px";
158 boximg.style.transformOrigin = "bottom left";
159 boximg.style.transform = "scale(" + (1.0 / dpr) + ")";
161 var boximg = document.getElementById(element_id + "_box");
162 if (boximg !== null) {
163 boximg.parentNode.removeChild(boximg);
170 function display_image_num(num, element_id)
172 var screen_size = find_width();
175 if (global_image_list[num][2] == -1) {
176 // no size information, use our pessimal guess
177 adjusted_size = max_image_size(screen_size);
179 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
182 var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
184 if (element_id == "image") {
185 // we want to shrink the box as much as possible if we know the true
189 // replace the anchor part (if any) with the image number
190 window.location.hash = "#" + (num+1);
196 function prepare_preload(img, num)
198 // cancel any pending preload
199 var preload = document.getElementById("preload");
200 if (preload !== null) {
201 preload.parentNode.removeChild(preload);
204 var preload_box = document.getElementById("preload_box");
205 if (preload_box !== null) {
206 preload_box.parentNode.removeChild(preload_box);
209 // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
210 // completeness first; should at least be _somewhat_ better
212 display_image_num(num, "preload");
214 img.onload = function() { display_image_num(num, "preload"); };
218 function can_go_next()
220 return (global_image_num < global_image_list.length - 1);
223 function can_go_previous()
225 return (global_image_num > 0);
228 function set_opacity(id, amount)
230 var elem = document.getElementById(id);
232 // If optionmenu is visible, options is also visible.
233 if (id === "options" && amount < 0.7) {
234 var optionmenu = document.getElementById("optionmenu");
235 if (optionmenu.style.display === "block") {
239 elem.style.opacity = amount;
242 function center_image(num)
244 var screen_size = find_width();
245 var dpr = find_dpr();
248 if (global_image_list[num][2] == -1) {
249 // no size information, use our pessimal guess
250 var adjusted_size = max_image_size(screen_size);
251 width = adjusted_size[0];
252 height = adjusted_size[1];
254 // use the exact information
255 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
256 width = adjusted_size[2];
257 height = adjusted_size[3];
260 // center the image on-screen
261 var main = document.getElementById("main");
262 main.style.position = "absolute";
263 main.style.left = (((screen_size[0] - width) / 2) / dpr) + "px";
264 main.style.top = (((screen_size[1] - height) / 2) / dpr) + "px";
265 main.style.width = (width / dpr) + "px";
266 main.style.height = (height / dpr) + "px";
267 main.style.lineHeight = (height / dpr) + "px";
272 var img = display_image_num(global_image_num, "image");
274 prepare_preload(img, global_image_num + 1);
277 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
278 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
279 set_opacity("close", global_default_opacity);
280 set_opacity("options", global_default_opacity);
283 function go_previous()
285 if (!can_go_previous()) {
289 var img = display_image_num(--global_image_num, "image");
290 if (can_go_previous()) {
291 set_opacity("previous", global_default_opacity);
292 prepare_preload(img, global_image_num - 1);
294 set_opacity("previous", global_disabled_opacity);
296 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
301 if (!can_go_next()) {
305 var img = display_image_num(++global_image_num, "image");
307 set_opacity("next", global_default_opacity);
308 prepare_preload(img, global_image_num + 1);
310 set_opacity("next", global_disabled_opacity);
312 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
317 window.location = global_return_url;
320 function toggle_optionmenu()
322 var optionmenu = document.getElementById("optionmenu");
323 if (optionmenu.style.display === "block") {
324 optionmenu.style.display = "none";
326 optionmenu.style.display = "block";
327 set_opacity("options", 0.7);
331 function draw_text(msg)
333 // remove any text we might have left
334 var text = document.getElementById("text");
336 text.parentNode.removeChild(text);
339 text = document.createElement("p");
341 text.style.position = "absolute";
342 text.style.color = "white";
343 text.style.lineHeight = "24px";
344 text.style.font = "24px verdana, arial, sans-serif";
345 text.innerHTML = msg;
347 var main = document.getElementById("main");
348 main.appendChild(text);
350 text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
351 text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
354 function fade_text(opacity)
356 set_opacity("text", opacity);
362 setTimeout("fade_text(" + opacity + ")", 30);
364 var text = document.getElementById("text");
366 text.parentNode.removeChild(text);
371 function select_image(evt, filename, selected)
378 draw_text("Selecting " + filename + "...");
380 draw_text("Unselecting " + filename + "...");
383 req.open("POST", window.location.origin + "/select", false);
384 req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
385 req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
387 setTimeout("fade_text(0.99)", 30);
390 function key_down(which)
392 if (which == 39) { // right
394 set_opacity("next", global_highlight_opacity);
396 } else if (which == 37) { // left
397 if (can_go_previous()) {
398 set_opacity("previous", global_highlight_opacity);
400 } else if (which == 27) { // escape
401 set_opacity("close", global_higlight_opacity);
403 check_for_hash_change();
407 function key_up(which) {
408 if (which == 39) { // right
410 set_opacity("next", global_default_opacity);
413 } else if (which == 37) { // left
414 if (can_go_previous()) {
415 set_opacity("previous", global_default_opacity);
418 } else if (which == 27) { // escape
419 set_opacity("close", global_default_opacity);
421 } else if (which == 32 && global_select) { // space
422 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
423 } else if (which == 85 && global_select) { // u
424 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
426 check_for_hash_change();
430 function parse_image_num(default_value) {
431 var num = parseInt(window.location.hash.substr(1));
432 if (num >= 1 && num <= global_image_list.length) { // and then num != NaN
435 return default_value;
439 function check_for_hash_change() {
440 var num = parse_image_num(-1);
441 if (num != -1 && num != global_image_num) {
442 global_image_num = num;
447 function toggle_immersive() {
448 if (global_default_opacity == 0.7) {
449 global_disabled_opacity = 0.0;
450 global_default_opacity = 0.0;
451 global_highlight_opacity = 0.2;
452 global_infobox = false;
453 document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
455 global_disabled_opacity = 0.1;
456 global_default_opacity = 0.7;
457 global_highlight_opacity = 1.0;
458 global_infobox = true;
459 document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';