4 return [window.innerWidth * dpr, window.innerHeight * dpr];
9 return window.devicePixelRatio || 1;
13 * pr0n can resize to any size we'd like, but we're much more likely
14 * to have this set of fixed-resolution screens cached, so to increase
15 * performance, we round down to the closest fit and use that. This
16 * function is a pessimal estimate of what thumbnail size we can _always_
17 * fit on the screen -- it's right if and only if all images are 4:3
18 * (and landscape). If individual size information is available, use
19 * pick_image_size, below.
38 function max_image_size(screen_size)
41 for (i = 0; i < fixed_sizes.length; ++i) {
42 if (screen_size[0] >= fixed_sizes[i][0] && screen_size[1] >= fixed_sizes[i][1]) {
43 return fixed_sizes[i];
49 function pick_image_size(screen_size, image_size)
52 for (i = 0; i < fixed_sizes.length; ++i) {
53 // this is a duplicate of pr0n's resizing code, hope for no floating-point
55 var thumbxres = fixed_sizes[i][0];
56 var thumbyres = fixed_sizes[i][1];
57 var width = image_size[0];
58 var height = image_size[1];
60 if (!(thumbxres >= width && thumbyres >= height)) {
61 var sfh = width / thumbxres;
62 var sfv = height / thumbyres;
70 width = Math.floor(width);
71 height = Math.floor(height);
74 if (screen_size[0] >= width && screen_size[1] >= height) {
75 // be sure _not_ to return a reference
76 return [ fixed_sizes[i][0], fixed_sizes[i][1], width, height ];
82 function replace_image_element(url, element_id, parent_node)
84 var img = document.getElementById(element_id);
86 if (img.src === url) {
89 img.parentNode.removeChild(img);
92 img = document.createElement("img");
96 parent_node.appendChild(img);
100 function rename_element(old_name, new_name)
102 // Remove any element that's in the way.
103 var elem = document.getElementById(new_name);
105 elem.parentNode.removeChild(elem);
108 elem = document.getElementById(old_name);
115 function display_image(width, height, evt, filename, element_id)
117 var url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/" + filename;
118 var main = document.getElementById("iehack");
119 var preload = document.getElementById("preload");
120 var dpr = find_dpr();
122 // See if we have a preload going on that we can reuse.
123 if (element_id == "image" && preload !== null && preload.src == url) {
124 rename_element("preload_box", "image_box");
125 img = rename_element("preload", "image");
127 img = replace_image_element(url, element_id, main);
129 img.style.position = "absolute";
130 img.style.left = "0px";
131 img.style.top = "0px";
132 img.style.transformOrigin = "top left";
133 img.style.transform = "scale(" + (1.0 / dpr) + ")";
135 // Update the "download original" link.
136 var original_url = window.location.origin + "/" + evt + "/original/" + filename;
137 document.getElementById("origdownload").href = original_url;
139 if (global_infobox) {
142 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
144 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "@" + dpr.toFixed(2) + "/box/" + filename;
146 var boximg = replace_image_element(url, element_id + "_box", main);
148 boximg.style.position = "absolute";
149 boximg.style.left = "0px";
150 boximg.style.bottom = "-1px";
151 boximg.style.transformOrigin = "bottom left";
152 boximg.style.transform = "scale(" + (1.0 / dpr) + ")";
154 var boximg = document.getElementById(element_id + "_box");
155 if (boximg !== null) {
156 boximg.parentNode.removeChild(boximg);
163 function display_image_num(num, element_id)
165 var screen_size = find_width();
168 if (global_image_list[num][2] == -1) {
169 // no size information, use our pessimal guess
170 adjusted_size = max_image_size(screen_size);
172 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
175 var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
177 if (element_id == "image") {
178 // we want to shrink the box as much as possible if we know the true
182 // replace the anchor part (if any) with the image number
183 window.location.hash = "#" + (num+1);
189 function prepare_preload(img, num)
191 // cancel any pending preload
192 var preload = document.getElementById("preload");
193 if (preload !== null) {
194 preload.parentNode.removeChild(preload);
197 var preload_box = document.getElementById("preload_box");
198 if (preload_box !== null) {
199 preload_box.parentNode.removeChild(preload_box);
202 // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
203 // completeness first; should at least be _somewhat_ better
205 display_image_num(num, "preload");
207 img.onload = function() { display_image_num(num, "preload"); };
211 function can_go_next()
213 return (global_image_num < global_image_list.length - 1);
216 function can_go_previous()
218 return (global_image_num > 0);
221 function set_opacity(id, amount)
223 var elem = document.getElementById(id);
225 // If optionmenu is visible, options is also visible.
226 if (id === "options" && amount < 0.7) {
227 var optionmenu = document.getElementById("optionmenu");
228 if (optionmenu.style.display === "block") {
232 elem.style.opacity = amount;
235 function center_image(num)
237 var screen_size = find_width();
238 var dpr = find_dpr();
241 if (global_image_list[num][2] == -1) {
242 // no size information, use our pessimal guess
243 var adjusted_size = max_image_size(screen_size);
244 width = adjusted_size[0];
245 height = adjusted_size[1];
247 // use the exact information
248 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
249 width = adjusted_size[2];
250 height = adjusted_size[3];
253 // center the image on-screen
254 var main = document.getElementById("main");
255 main.style.position = "absolute";
256 main.style.left = (((screen_size[0] - width) / 2) / dpr) + "px";
257 main.style.top = (((screen_size[1] - height) / 2) / dpr) + "px";
258 main.style.width = (width / dpr) + "px";
259 main.style.height = (height / dpr) + "px";
260 main.style.lineHeight = (height / dpr) + "px";
265 var img = display_image_num(global_image_num, "image");
267 prepare_preload(img, global_image_num + 1);
270 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
271 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
272 set_opacity("close", global_default_opacity);
273 set_opacity("options", global_default_opacity);
276 function go_previous()
278 if (!can_go_previous()) {
282 var img = display_image_num(--global_image_num, "image");
283 if (can_go_previous()) {
284 set_opacity("previous", global_default_opacity);
285 prepare_preload(img, global_image_num - 1);
287 set_opacity("previous", global_disabled_opacity);
289 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
294 if (!can_go_next()) {
298 var img = display_image_num(++global_image_num, "image");
300 set_opacity("next", global_default_opacity);
301 prepare_preload(img, global_image_num + 1);
303 set_opacity("next", global_disabled_opacity);
305 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
310 if (global_image_num > 0) {
311 window.location = global_return_url + '#' + (global_image_num + 1);
313 window.location = global_return_url;
317 function toggle_optionmenu()
319 var optionmenu = document.getElementById("optionmenu");
320 if (optionmenu.style.display === "block") {
321 optionmenu.style.display = "none";
323 optionmenu.style.display = "block";
324 set_opacity("options", 0.7);
328 function draw_text(msg)
330 // remove any text we might have left
331 var text = document.getElementById("text");
333 text.parentNode.removeChild(text);
336 text = document.createElement("p");
338 text.style.position = "absolute";
339 text.style.color = "white";
340 text.style.lineHeight = "24px";
341 text.style.font = "24px verdana, arial, sans-serif";
342 text.innerHTML = msg;
344 var main = document.getElementById("main");
345 main.appendChild(text);
347 text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
348 text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
351 function fade_text(opacity)
353 set_opacity("text", opacity);
359 setTimeout("fade_text(" + opacity + ")", 30);
361 var text = document.getElementById("text");
363 text.parentNode.removeChild(text);
368 function select_image(evt, filename, selected)
371 draw_text("Selecting " + filename + "...");
373 draw_text("Unselecting " + filename + "...");
376 var req = new XMLHttpRequest();
377 req.open("POST", window.location.origin + "/select", false);
378 req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
379 req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
381 setTimeout("fade_text(0.99)", 30);
384 function key_down(which)
386 if (which == 39) { // right
388 set_opacity("next", global_highlight_opacity);
390 } else if (which == 37) { // left
391 if (can_go_previous()) {
392 set_opacity("previous", global_highlight_opacity);
394 } else if (which == 27) { // escape
395 set_opacity("close", global_higlight_opacity);
397 check_for_hash_change();
401 function key_up(which) {
402 if (which == 39) { // right
404 set_opacity("next", global_default_opacity);
407 } else if (which == 37) { // left
408 if (can_go_previous()) {
409 set_opacity("previous", global_default_opacity);
412 } else if (which == 27) { // escape
413 set_opacity("close", global_default_opacity);
415 } else if (which == 32 && global_select) { // space
416 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
417 } else if (which == 85 && global_select) { // u
418 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
420 check_for_hash_change();
424 function parse_image_num(default_value) {
425 var num = parseInt(window.location.hash.substr(1));
426 if (num >= 1 && num <= global_image_list.length) { // and then num != NaN
429 return default_value;
433 function check_for_hash_change() {
434 var num = parse_image_num(-1);
435 if (num != -1 && num != global_image_num) {
436 global_image_num = num;
441 function toggle_immersive() {
442 if (global_default_opacity == 0.7) {
443 global_disabled_opacity = 0.0;
444 global_default_opacity = 0.0;
445 global_highlight_opacity = 0.2;
446 global_infobox = false;
447 document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
449 global_disabled_opacity = 0.1;
450 global_default_opacity = 0.7;
451 global_highlight_opacity = 1.0;
452 global_infobox = true;
453 document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';
458 window.onload = function() {
460 setInterval(check_for_hash_change, 1000);
462 var body = document.body;
463 body.onresize = function() { relayout(); };
464 body.onkeydown = function() { key_down(event.keyCode); };
465 body.onkeyup = function() { key_up(event.keyCode); };
466 body.onhashchange = function() { check_for_hash_change(); };
467 body.onclick = function() { check_for_hash_change(); };
469 var previous = document.getElementById('previous');
470 previous.onmousedown = function() { if (can_go_previous()) { set_opacity('previous', global_highlight_opacity); } };
471 previous.onmouseup = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); go_previous(); } };
472 previous.onmouseout = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); } };
474 var next = document.getElementById('next');
475 next.onmousedown = function() { if (can_go_next()) { set_opacity('next', global_highlight_opacity); } };
476 next.onmouseup = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); go_next(); } };
477 next.onmouseout = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); } };
479 var close = document.getElementById('close');
480 close.onmousedown = function() { set_opacity('close', global_highlight_opacity); };
481 close.onmouseup = function() { set_opacity('close', global_default_opacity); do_close(); };
482 close.onmouseout = function() { set_opacity('close', global_default_opacity); };
484 var options = document.getElementById('options');
485 options.onmousedown = function() { set_opacity('options', global_highlight_opacity); };
486 options.onmouseup = function() { set_opacity('options', global_default_opacity); toggle_optionmenu(); };
487 options.onmouseout = function() { set_opacity('options', global_default_opacity); };