Some infobox adjustments.
[pr0n] / files / pr0n-fullscreen.js
1 (function() {
2
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;
7
8 function find_width()
9 {
10         var dpr = find_dpr();
11         return [window.innerWidth * dpr, window.innerHeight * dpr];
12 }
13
14 function find_dpr()
15 {
16         return window.devicePixelRatio || 1;
17 }
18
19 /*
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.
27  */
28 var fixed_sizes = [
29         [ 3840, 2880 ],
30         [ 3200, 2400 ],
31         [ 2800, 2100 ],
32         [ 2304, 1728 ],
33         [ 2048, 1536 ],
34         [ 1920, 1440 ],
35         [ 1600, 1200 ],
36         [ 1400, 1050 ],
37         [ 1280, 960 ],
38         [ 1152, 864 ],
39         [ 1024, 768 ],
40         [ 800, 600 ],
41         [ 640, 480 ],
42         [ 512, 384 ],
43         [ 320, 256 ],
44         [ 240, 192 ],
45         [ 120, 96 ],
46         [ 80, 64 ]
47 ];
48 function max_image_size(screen_size)
49 {
50         var i;
51         for (i = 0; i < fixed_sizes.length; ++i) {
52                 if (screen_size[0] >= fixed_sizes[i][0] && screen_size[1] >= fixed_sizes[i][1]) {
53                         return fixed_sizes[i];
54                 }
55         }
56         return [ 80, 64 ];
57 }
58
59 function pick_image_size(screen_size, image_size)
60 {
61         var i;
62         for (i = 0; i < fixed_sizes.length; ++i) {
63                 // this is a duplicate of pr0n's resizing code, hope for no floating-point
64                 // inaccuracies :-)
65                 var thumbxres = fixed_sizes[i][0];
66                 var thumbyres = fixed_sizes[i][1];
67                 var width = image_size[0];
68                 var height = image_size[1];
69
70                 if (!(thumbxres >= width && thumbyres >= height)) {
71                         var sfh = width / thumbxres;
72                         var sfv = height / thumbyres;
73                         if (sfh > sfv) {
74                                 width  /= sfh;
75                                 height /= sfh;
76                         } else {
77                                 width  /= sfv;
78                                 height /= sfv;
79                         }
80                         width = Math.floor(width);
81                         height = Math.floor(height);
82                 }
83
84                 if (screen_size[0] >= width && screen_size[1] >= height) {
85                         // be sure _not_ to return a reference
86                         return [ fixed_sizes[i][0], fixed_sizes[i][1], width, height ];
87                 }
88         }
89         return [ 80, 64 ];
90 }
91
92 function rename_element(old_name, new_name)
93 {
94         // Remove any element that's in the way.
95         var elem = document.getElementById(new_name);
96         if (elem !== null) {
97                 elem.parentNode.removeChild(elem);
98         }
99
100         elem = document.getElementById(old_name);
101         if (elem !== null) {
102                 elem.id = new_name;
103         }
104         return elem;
105 }
106
107 function display_image(url, backend_width, backend_height, elem_id, offset, box)
108 {
109         // See if this image already exists in the DOM; if not, add it.
110         var img = document.getElementById(elem_id);
111         if (img === null) {
112                 img = document.createElement("img");
113                 img.id = elem_id;
114                 img.alt = "";
115                 img.className = box ? "fsbox" : "fsimg";
116         }
117         img.style.position = "absolute";
118         img.style.transformOrigin = "top left";
119         document.getElementById("main").appendChild(img);
120
121         if (offset === 0) {
122                 img.src = url;
123                 position_image(img, backend_width, backend_height, offset, box);
124         } else {
125                 // This is a preload, so wait for the main image to be ready.
126                 // The test for .complete is an old IE hack, which I don't know if is relevant anymore.
127                 var main_img = document.getElementById(global_image_num);
128                 if (main_img === null || main_img.complete) {
129                         img.src = url;
130                 } else {
131                         main_img.addEventListener('load', function() { img.src = url; }, false);
132                 }
133
134                 // Seemingly one needs to delay position_image(), or Firefox will set the initial
135                 // scroll offset completely off.
136                 img.style.display = 'none';
137                 setTimeout(function() {
138                         position_image(img, backend_width, backend_height, offset, box);
139                         img.style.display = null;
140                 }, 1);
141         }
142 }
143
144 function display_image_num(num, offset)
145 {
146         var screen_size = find_width();
147         var adjusted_size;
148
149         if (global_image_list[num][2] == -1) {
150                 // no size information, use our pessimal guess
151                 adjusted_size = max_image_size(screen_size);
152         } else {
153                 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
154         }
155
156         var evt = global_image_list[num][0];
157         var filename = global_image_list[num][1];
158         var backend_width = adjusted_size[0];
159         var backend_height = adjusted_size[1];
160         var url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "/" + filename;
161         var elem_id = num;
162
163         display_image(url, adjusted_size[2], adjusted_size[3], elem_id, offset, false);
164
165         if (global_infobox) {
166                 var url;
167                 var dpr = find_dpr();
168                 var elem_id = num + "_box";
169                 if (dpr == 1) {
170                         url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "/box/" + filename;
171                 } else {
172                         url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "@" + dpr.toFixed(2) + "/box/" + filename;
173                 }
174                 display_image(url, adjusted_size[2], adjusted_size[3], elem_id, offset, true);
175                 document.getElementById(elem_id).style.transform += " scale(" + (1.0 / dpr) + ")";
176         }
177
178         if (offset === 0) {
179                 // Update the "download original" link.
180                 var original_url = window.location.origin + "/" + evt + "/original/" + filename;
181                 document.getElementById("origdownload").href = original_url;
182
183                 // If it's a raw image, show a JPEG link.
184                 var fulldownload = document.getElementById("fulldownload");
185                 if (filename.match(/\.(nef|cr2)$/i)) {
186                         fulldownload.style.display = "block";
187                         var full_url = window.location.origin + "/" + evt + "/" + filename;
188                         document.getElementById("fulldownloadlink").href = full_url;
189                         origdownload.innerHTML = "Download original image (RAW)";
190                 } else {
191                         fulldownload.style.display = "none";
192                         origdownload.innerHTML = "Download original image";
193                 }
194
195                 // replace the anchor part (if any) with the image number
196                 window.location.hash = "#" + (num+1);
197         }
198 }
199
200 function can_go_next()
201 {
202         return (global_image_num < global_image_list.length - 1);
203 }
204
205 function can_go_previous()
206 {
207         return (global_image_num > 0);
208 }
209
210 function set_opacity(id, amount)
211 {
212         var elem = document.getElementById(id);
213
214         // If optionmenu is visible, options is also visible.
215         if (id === "options" && amount < 0.7) {
216                 var optionmenu = document.getElementById("optionmenu");
217                 if (optionmenu.style.display === "block") {
218                         amount = 0.7;
219                 }
220         }
221         elem.style.opacity = amount;
222 }
223
224 function position_image(img, backend_width, backend_height, offset, box)
225 {
226         var screen_size = find_width();
227         var dpr = find_dpr();
228         var width, height;
229
230         if (backend_width == -1) {
231                 // no size information, use our pessimal guess
232                 var adjusted_size = max_image_size(screen_size);
233                 width = adjusted_size[0];
234                 height = adjusted_size[1];
235         } else {
236                 // use the exact information
237                 var adjusted_size = pick_image_size(screen_size, [ backend_width, backend_height ]);
238                 width = adjusted_size[2];
239                 height = adjusted_size[3];
240         }
241
242         var extra_x_offset = find_width()[0] * offset;
243         var left = (screen_size[0] - width) / 2;
244         var top = (screen_size[1] - height) / 2;
245
246         if (global_infobox) {
247                 top = Math.max(top - dpr * (24/2), 0);
248         }
249
250         // center the image on-screen
251         img.style.position = "absolute";
252         img.style.left = (left / dpr) + "px";
253         img.style.transform = "translate(" + extra_x_offset + "px,0px)";
254
255         if (box) {
256                 img.style.top = Math.min(top + height, screen_size[1] - 24) / dpr + "px";
257         } else {
258                 img.style.top = (top / dpr) + "px";
259                 img.style.lineHeight = (height / dpr) + "px";
260                 img.style.width = (width / dpr) + "px";
261                 img.style.height = (height / dpr) + "px";
262         }
263 }
264
265 function update_shown_images()
266 {
267         // Go through and remove all the elements that are not supposed to be there.
268         var main = document.getElementById("main");
269         var children = main.children;
270         var to_remove = [];
271         for (var i = 0; i < children.length; i++) {
272                 var child = children[i];
273                 var inum = null;
274                 if (child.className === "fsimg") {
275                         inum = parseInt(child.id);
276                 } else if (child.className === "fsbox") {
277                         inum = parseInt(child.id.replace("_box", ""));
278                 } else {
279                         continue;
280                 }
281
282                 // FIXME: For whatever reason, if we don't actually remove an item
283                 // and then scroll it out of view, Chrome scrolls to it.
284                 // So don't keep anything that's going to be a preload;
285                 // we'll have to recreate the element entirely.
286                 //if (inum !== global_image_num - 1 &&
287                 //    inum !== global_image_num &&
288                 //    inum !== global_image_num + 1) {
289                 //      to_remove.push(child);
290                 //}
291                 if (inum !== global_image_num) {
292                         to_remove.push(child);
293                 }
294         }
295         for (let child of to_remove) {
296                 child.parentNode.removeChild(child);
297         }
298
299         // Add any missing elements. Note that we add the main one first,
300         // so that the preloads have an element to fire onload off of.
301         display_image_num(global_image_num, 0);
302         if (can_go_previous()) {
303                 display_image_num(global_image_num - 1, -1);
304         }
305         if (can_go_next()) {
306                 display_image_num(global_image_num + 1, 1);
307         }
308 }
309
310 function relayout()
311 {
312         update_shown_images();
313
314         set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
315         set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
316         set_opacity("close", global_default_opacity);
317         set_opacity("options", global_default_opacity);
318 }
319
320 function go_previous()
321 {
322         if (!can_go_previous()) {
323                 return;
324         }
325
326         --global_image_num;
327         update_shown_images();
328         if (can_go_previous()) {
329                 set_opacity("previous", global_default_opacity);
330         } else {
331                 set_opacity("previous", global_disabled_opacity);
332         }
333         set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
334 }
335
336 function go_next()
337 {
338         if (!can_go_next()) {
339                 return;
340         }
341
342         ++global_image_num;
343         update_shown_images();
344         if (can_go_next()) {
345                 set_opacity("next", global_default_opacity);
346         } else {
347                 set_opacity("next", global_disabled_opacity);
348         }
349         set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
350 }
351
352 function do_close()
353 {
354         if (global_image_num > 0) {
355                 window.location = global_return_url + '#' + (global_image_num + 1);
356         } else {
357                 window.location = global_return_url;
358         }
359 }
360
361 function toggle_optionmenu()
362 {
363         var optionmenu = document.getElementById("optionmenu");
364         if (optionmenu.style.display === "block") {
365                 optionmenu.style.display = "none";
366         } else {
367                 optionmenu.style.display = "block";
368                 set_opacity("options", 0.7);
369         }
370 }
371 window['toggle_optionmenu'] = toggle_optionmenu;
372
373 function draw_text(msg)
374 {
375         // remove any text we might have left
376         var text = document.getElementById("text");
377         if (text !== null) {
378                 text.parentNode.removeChild(text);
379         }
380
381         text = document.createElement("p");
382         text.id = "text";
383         text.style.position = "absolute";
384         text.style.color = "white";
385         text.style.lineHeight = "24px";
386         text.style.font = "24px verdana, arial, sans-serif";
387         text.innerHTML = msg;
388
389         document.getElementById("main").appendChild(text);
390
391         var screen_size = find_width();
392         text.style.left = (screen_size[0] - text.clientWidth) / 2 + "px";
393         text.style.top = (screen_size[1] - text.clientHeight) / 2 + "px";
394 }
395
396 function fade_text(opacity)
397 {
398         set_opacity("text", opacity);
399         if (opacity > 0.0) {
400                 opacity -= 0.03;
401                 if (opacity < 0.0) {
402                         opacity = 0.0;
403                 }
404                 setTimeout(function() { fade_text(opacity); }, 30);
405         } else {
406                 var text = document.getElementById("text");
407                 if (text !== null) {
408                         text.parentNode.removeChild(text);
409                 }
410         }
411 }
412
413 function select_image(evt, filename, selected)
414 {
415         if (selected) {
416                 draw_text("Selecting " + filename + "...");
417         } else {
418                 draw_text("Unselecting " + filename + "...");
419         }
420         
421         var req = new XMLHttpRequest();
422         req.open("POST", window.location.origin + "/select", true);
423         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
424         req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
425
426         setTimeout(function() { fade_text(0.99); }, 30);
427 }
428
429 function key_down(which)
430 {
431         if (which == 39) {   // right
432                 if (can_go_next()) {
433                         set_opacity("next", global_highlight_opacity);
434                 }
435         } else if (which == 37) {   // left
436                 if (can_go_previous()) {
437                         set_opacity("previous", global_highlight_opacity);
438                 }
439         } else if (which == 27) {   // escape
440                 set_opacity("close", global_higlight_opacity);
441         } else {
442                 check_for_hash_change();
443         }
444 }
445
446 function key_up(which) {
447         if (which == 39) {   // right
448                 if (can_go_next()) {
449                         set_opacity("next", global_default_opacity);
450                         go_next();
451                 }
452         } else if (which == 37) {   // left
453                 if (can_go_previous()) {
454                         set_opacity("previous", global_default_opacity);
455                         go_previous();
456                 }
457         } else if (which == 27) {   // escape
458                 set_opacity("close", global_default_opacity);
459                 do_close();
460         } else if (which == 32 && global_select) {   // space
461                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
462         } else if (which == 85 && global_select) {   // u
463                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
464         } else {
465                 check_for_hash_change();
466         }
467 }
468
469 function parse_image_num(default_value) {
470         var num = parseInt(window.location.hash.substr(1));
471         if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
472                 return (num - 1);
473         } else {
474                 return default_value;
475         }
476 }
477 window['parse_image_num'] = parse_image_num;
478
479 function check_for_hash_change() {
480         var num = parse_image_num(-1);
481         if (num != -1 && num != global_image_num) {
482                 global_image_num = num;
483                 relayout();
484         }
485 }
486
487 function toggle_immersive() {
488         if (global_default_opacity == 0.7) {
489                 global_disabled_opacity = 0.0;
490                 global_default_opacity = 0.0;
491                 global_highlight_opacity = 0.2;
492                 global_infobox = false;
493                 document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
494         } else {
495                 global_disabled_opacity = 0.1;
496                 global_default_opacity = 0.7;
497                 global_highlight_opacity = 1.0;
498                 global_infobox = true;
499                 document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';
500         }
501         relayout();
502 }
503 window['toggle_immersive'] = toggle_immersive;
504
505 var swiping = false;
506 var swipe_start_x = 0;
507
508 function set_swipe_pos(x, transition)
509 {
510         x = Math.max(x, -window.innerWidth);
511         x = Math.min(x,  window.innerWidth);
512         if (!can_go_previous()) {
513                 x = Math.min(x, window.innerWidth / 8);
514         }
515         if (!can_go_next()) {
516                 x = Math.max(x, -window.innerWidth / 8);
517         }
518
519         var dpr = find_dpr();
520         var main = document.getElementById("main");
521         var children = main.children;
522         var to_remove = [];
523         for (var i = 0; i < children.length; i++) {
524                 var child = children[i];
525                 if (child.className === "fsimg") {
526                         var inum = parseInt(child.id);
527                         var offset = inum - global_image_num;
528                         child.style.transition = transition;
529                         child.style.transform = "translate(" + (x + find_width()[0] * offset / dpr) + "px,0px)";
530                 } else if (child.className === "fsbox") {
531                         var inum = parseInt(child.id.replace("_box", ""));
532                         var offset = inum - global_image_num;
533                         child.style.transition = transition;
534                         child.style.transform = "translate(" + (x + find_width()[0] * offset / dpr) + "px,0px) scale(" + (1.0 / dpr) + ")";
535                 }
536         }
537 }
538
539 function start_swipe(e)
540 {
541         swiping = true;
542         swipe_start_x = e.changedTouches[0].pageX;
543 }
544
545 function end_swipe(e)
546 {
547         if (swiping) {
548                 var new_x = (e.changedTouches[0].pageX - swipe_start_x);
549                 if (new_x < -window.innerWidth / 4 && can_go_next()) {
550                         set_swipe_pos(-window.innerWidth, "transform 0.1s ease-out");
551                         setTimeout(function() { go_next(); }, 100);
552                 } else if (new_x > window.innerWidth / 4 && can_go_previous()) {
553                         set_swipe_pos(window.innerWidth, "transform 0.1s ease-out");
554                         setTimeout(function() { go_previous(); }, 100);
555                 } else {
556                         set_swipe_pos(0, "transform 0.1s ease-out");
557                 }
558                 swiping = false;
559         }
560 }
561
562 function swipe(e)
563 {
564         if (swiping) {
565                 var new_x = (e.changedTouches[0].pageX - swipe_start_x);
566                 set_swipe_pos(new_x, null);
567         }
568 }
569
570 window.onload = function() {
571         relayout();
572         setInterval(check_for_hash_change, 1000);
573
574         document.addEventListener('touchstart', start_swipe, false);
575         document.addEventListener('touchend', end_swipe, false);
576         document.addEventListener('touchmove', swipe, false)
577
578         var body = document.body;
579         body.onresize = function() { relayout(); };
580         body.onkeydown = function(evt) { key_down(evt.keyCode); };
581         body.onkeyup = function(evt) { key_up(evt.keyCode); };
582         body.onhashchange = function() { check_for_hash_change(); };
583         body.onclick = function() { check_for_hash_change(); };
584
585         var previous = document.getElementById('previous');
586         previous.onmousedown = function() { if (can_go_previous()) { set_opacity('previous', global_highlight_opacity); } };
587         previous.onmouseup = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); go_previous(); } };
588         previous.onmouseout = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); } };
589
590         var next = document.getElementById('next');
591         next.onmousedown = function() { if (can_go_next()) { set_opacity('next', global_highlight_opacity); } };
592         next.onmouseup = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); go_next(); } };
593         next.onmouseout = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); } };
594
595         var close = document.getElementById('close');
596         close.onmousedown = function() { set_opacity('close', global_highlight_opacity); };
597         close.onmouseup = function() { set_opacity('close', global_default_opacity); do_close(); };
598         close.onmouseout = function() { set_opacity('close', global_default_opacity); };
599
600         var options = document.getElementById('options');
601         options.onmousedown = function() { set_opacity('options', global_highlight_opacity); };
602         options.onmouseup = function() { set_opacity('options', global_default_opacity); toggle_optionmenu(); };
603         options.onmouseout = function() { set_opacity('options', global_default_opacity); };
604 };
605
606 })();