3 var global_disabled_opacity = 0.1;
4 var global_default_opacity = 0.7;
5 var global_highlight_opacity = 1.0;
6 var global_infobox = true;
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 if (element_id == "image") {
143 // Update the "download original" link.
144 var original_url = window.location.origin + "/" + evt + "/original/" + filename;
145 document.getElementById("origdownload").href = original_url;
148 if (global_infobox) {
151 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
153 url = window.location.origin + "/" + evt + "/" + width + "x" + height + "@" + dpr.toFixed(2) + "/box/" + filename;
155 var boximg = replace_image_element(url, element_id + "_box", main);
157 boximg.style.position = "absolute";
158 boximg.style.left = "0px";
159 boximg.style.bottom = "-1px";
160 boximg.style.transformOrigin = "bottom left";
161 boximg.style.transform = "scale(" + (1.0 / dpr) + ")";
163 var boximg = document.getElementById(element_id + "_box");
164 if (boximg !== null) {
165 boximg.parentNode.removeChild(boximg);
172 function display_image_num(num, element_id)
174 var screen_size = find_width();
177 if (global_image_list[num][2] == -1) {
178 // no size information, use our pessimal guess
179 adjusted_size = max_image_size(screen_size);
181 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
184 var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
186 if (element_id == "image") {
187 // we want to shrink the box as much as possible if we know the true
191 // replace the anchor part (if any) with the image number
192 window.location.hash = "#" + (num+1);
198 function prepare_preload(img, num)
200 // cancel any pending preload
201 var preload = document.getElementById("preload");
202 if (preload !== null) {
203 preload.parentNode.removeChild(preload);
206 var preload_box = document.getElementById("preload_box");
207 if (preload_box !== null) {
208 preload_box.parentNode.removeChild(preload_box);
211 // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
212 // completeness first; should at least be _somewhat_ better
214 display_image_num(num, "preload");
216 img.onload = function() { display_image_num(num, "preload"); };
220 function can_go_next()
222 return (global_image_num < global_image_list.length - 1);
225 function can_go_previous()
227 return (global_image_num > 0);
230 function set_opacity(id, amount)
232 var elem = document.getElementById(id);
234 // If optionmenu is visible, options is also visible.
235 if (id === "options" && amount < 0.7) {
236 var optionmenu = document.getElementById("optionmenu");
237 if (optionmenu.style.display === "block") {
241 elem.style.opacity = amount;
244 function center_image(num)
246 var screen_size = find_width();
247 var dpr = find_dpr();
250 if (global_image_list[num][2] == -1) {
251 // no size information, use our pessimal guess
252 var adjusted_size = max_image_size(screen_size);
253 width = adjusted_size[0];
254 height = adjusted_size[1];
256 // use the exact information
257 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
258 width = adjusted_size[2];
259 height = adjusted_size[3];
262 // center the image on-screen
263 var main = document.getElementById("main");
264 main.style.position = "absolute";
265 main.style.left = (((screen_size[0] - width) / 2) / dpr) + "px";
266 main.style.top = (((screen_size[1] - height) / 2) / dpr) + "px";
267 main.style.width = (width / dpr) + "px";
268 main.style.height = (height / dpr) + "px";
269 main.style.lineHeight = (height / dpr) + "px";
274 var img = display_image_num(global_image_num, "image");
276 prepare_preload(img, global_image_num + 1);
279 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
280 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
281 set_opacity("close", global_default_opacity);
282 set_opacity("options", global_default_opacity);
285 function go_previous()
287 if (!can_go_previous()) {
291 var img = display_image_num(--global_image_num, "image");
292 if (can_go_previous()) {
293 set_opacity("previous", global_default_opacity);
294 prepare_preload(img, global_image_num - 1);
296 set_opacity("previous", global_disabled_opacity);
298 set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
303 if (!can_go_next()) {
307 var img = display_image_num(++global_image_num, "image");
309 set_opacity("next", global_default_opacity);
310 prepare_preload(img, global_image_num + 1);
312 set_opacity("next", global_disabled_opacity);
314 set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
319 if (global_image_num > 0) {
320 window.location = global_return_url + '#' + (global_image_num + 1);
322 window.location = global_return_url;
326 function toggle_optionmenu()
328 var optionmenu = document.getElementById("optionmenu");
329 if (optionmenu.style.display === "block") {
330 optionmenu.style.display = "none";
332 optionmenu.style.display = "block";
333 set_opacity("options", 0.7);
336 window['toggle_optionmenu'] = toggle_optionmenu;
338 function draw_text(msg)
340 // remove any text we might have left
341 var text = document.getElementById("text");
343 text.parentNode.removeChild(text);
346 text = document.createElement("p");
348 text.style.position = "absolute";
349 text.style.color = "white";
350 text.style.lineHeight = "24px";
351 text.style.font = "24px verdana, arial, sans-serif";
352 text.innerHTML = msg;
354 var main = document.getElementById("main");
355 main.appendChild(text);
357 text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
358 text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
361 function fade_text(opacity)
363 set_opacity("text", opacity);
369 setTimeout("fade_text(" + opacity + ")", 30);
371 var text = document.getElementById("text");
373 text.parentNode.removeChild(text);
378 function select_image(evt, filename, selected)
381 draw_text("Selecting " + filename + "...");
383 draw_text("Unselecting " + filename + "...");
386 var req = new XMLHttpRequest();
387 req.open("POST", window.location.origin + "/select", false);
388 req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
389 req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
391 setTimeout("fade_text(0.99)", 30);
394 function key_down(which)
396 if (which == 39) { // right
398 set_opacity("next", global_highlight_opacity);
400 } else if (which == 37) { // left
401 if (can_go_previous()) {
402 set_opacity("previous", global_highlight_opacity);
404 } else if (which == 27) { // escape
405 set_opacity("close", global_higlight_opacity);
407 check_for_hash_change();
411 function key_up(which) {
412 if (which == 39) { // right
414 set_opacity("next", global_default_opacity);
417 } else if (which == 37) { // left
418 if (can_go_previous()) {
419 set_opacity("previous", global_default_opacity);
422 } else if (which == 27) { // escape
423 set_opacity("close", global_default_opacity);
425 } else if (which == 32 && global_select) { // space
426 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
427 } else if (which == 85 && global_select) { // u
428 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
430 check_for_hash_change();
434 function parse_image_num(default_value) {
435 var num = parseInt(window.location.hash.substr(1));
436 if (num >= 1 && num <= global_image_list.length) { // and then num != NaN
439 return default_value;
442 window['parse_image_num'] = parse_image_num;
444 function check_for_hash_change() {
445 var num = parse_image_num(-1);
446 if (num != -1 && num != global_image_num) {
447 global_image_num = num;
452 function toggle_immersive() {
453 if (global_default_opacity == 0.7) {
454 global_disabled_opacity = 0.0;
455 global_default_opacity = 0.0;
456 global_highlight_opacity = 0.2;
457 global_infobox = false;
458 document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
460 global_disabled_opacity = 0.1;
461 global_default_opacity = 0.7;
462 global_highlight_opacity = 1.0;
463 global_infobox = true;
464 document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';
468 window['toggle_immersive'] = toggle_immersive;
470 window.onload = function() {
472 setInterval(check_for_hash_change, 1000);
474 var body = document.body;
475 body.onresize = function() { relayout(); };
476 body.onkeydown = function() { key_down(event.keyCode); };
477 body.onkeyup = function() { key_up(event.keyCode); };
478 body.onhashchange = function() { check_for_hash_change(); };
479 body.onclick = function() { check_for_hash_change(); };
481 var previous = document.getElementById('previous');
482 previous.onmousedown = function() { if (can_go_previous()) { set_opacity('previous', global_highlight_opacity); } };
483 previous.onmouseup = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); go_previous(); } };
484 previous.onmouseout = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); } };
486 var next = document.getElementById('next');
487 next.onmousedown = function() { if (can_go_next()) { set_opacity('next', global_highlight_opacity); } };
488 next.onmouseup = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); go_next(); } };
489 next.onmouseout = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); } };
491 var close = document.getElementById('close');
492 close.onmousedown = function() { set_opacity('close', global_highlight_opacity); };
493 close.onmouseup = function() { set_opacity('close', global_default_opacity); do_close(); };
494 close.onmouseout = function() { set_opacity('close', global_default_opacity); };
496 var options = document.getElementById('options');
497 options.onmousedown = function() { set_opacity('options', global_highlight_opacity); };
498 options.onmouseup = function() { set_opacity('options', global_default_opacity); toggle_optionmenu(); };
499 options.onmouseout = function() { set_opacity('options', global_default_opacity); };