git.sesse.net Git - pr0n/blob - 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         [ 2304, 1728 ],
  30         [ 2048, 1536 ],
  31         [ 1920, 1440 ],
  32         [ 1600, 1200 ],
  33         [ 1400, 1050 ],
  34         [ 1280, 960 ],
  35         [ 1152, 864 ],
  36         [ 1024, 768 ],
  37         [ 800, 600 ],
  38         [ 640, 480 ],
  39         [ 512, 384 ],
  40         [ 320, 256 ],
  41         [ 240, 192 ],
  42         [ 120, 96 ],
  43         [ 80, 64 ]
  44 ];
  45 function max_image_size(screen_size)
  46 {
  47         var i;
  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];
  51                 }
  52         }
  53         return [ 80, 64 ];
  54 }
  55
  56 function pick_image_size(screen_size, image_size)
  57 {
  58         var i;
  59         for (i = 0; i < fixed_sizes.length; ++i) {
  60                 // this is a duplicate of pr0n's resizing code, hope for no floating-point
  61                 // inaccuracies :-)
  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];
  66
  67                 if (!(thumbxres >= width && thumbyres >= height)) {
  68                         var sfh = width / thumbxres;
  69                         var sfv = height / thumbyres;
  70                         if (sfh > sfv) {
  71                                 width  /= sfh;
  72                                 height /= sfh;
  73                         } else {
  74                                 width  /= sfv;
  75                                 height /= sfv;
  76                         }
  77                         width = Math.floor(width);
  78                         height = Math.floor(height);
  79                 }
  80
  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 ];
  84                 }
  85         }
  86         return [ 80, 64 ];
  87 }
  88
  89 function replace_image_element(url, element_id, parent_node)
  90 {
  91         var img = document.getElementById(element_id);
  92         if (img !== null) {
  93                 if (img.src === url) {
  94                         return img;
  95                 }
  96                 img.parentNode.removeChild(img);
  97         }
  98
  99         img = document.createElement("img");
 100         img.id = element_id;
 101         img.alt = "";
 102         img.src = url;
 103         parent_node.appendChild(img);
 104         return img;
 105 }
 106
 107 function rename_element(old_name, new_name)
 108 {
 109         // Remove any element that's in the way.
 110         var elem = document.getElementById(new_name);
 111         if (elem !== null) {
 112                 elem.parentNode.removeChild(elem);
 113         }
 114
 115         elem = document.getElementById(old_name);
 116         if (elem !== null) {
 117                 elem.id = new_name;
 118         }
 119         return elem;
 120 }
 121
 122 function display_image(width, height, evt, filename, element_id)
 123 {
 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();
 128         var img;
 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");
 133         } else {
 134                 img = replace_image_element(url, element_id, main);
 135         }
 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) + ")";
 141
 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;
 146
 147                 // If it's a raw image, show a JPEG link.
 148                 var fulldownload = document.getElementById("fulldownload");
 149                 if (filename.match(/\.(nef|cr2)$/i)) {
 150                         fulldownload.style.display = "block";
 151                         var full_url = window.location.origin + "/" + evt + "/" + filename;
 152                         document.getElementById("fulldownloadlink").href = full_url;
 153                         origdownload.innerHTML = "Download original image (RAW)";
 154                 } else {
 155                         fulldownload.style.display = "none";
 156                         origdownload.innerHTML = "Download original image";
 157                 }
 158         }
 159
 160         if (global_infobox) {
 161                 var url;
 162                 if (dpr == 1) {
 163                         url = window.location.origin + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
 164                 } else {
 165                         url = window.location.origin + "/" + evt + "/" + width + "x" + height + "@" + dpr.toFixed(2) + "/box/" + filename;
 166                 }
 167                 var boximg = replace_image_element(url, element_id + "_box", main);
 168
 169                 boximg.style.position = "absolute";
 170                 boximg.style.left = "0px";
 171                 boximg.style.bottom = "-1px";
 172                 boximg.style.transformOrigin = "bottom left";
 173                 boximg.style.transform = "scale(" + (1.0 / dpr) + ")";
 174         } else {
 175                 var boximg = document.getElementById(element_id + "_box");
 176                 if (boximg !== null) {
 177                         boximg.parentNode.removeChild(boximg);
 178                 }
 179         }
 180
 181         return img;
 182 }
 183
 184 function display_image_num(num, element_id)
 185 {
 186         var screen_size = find_width();
 187         var adjusted_size;
 188
 189         if (global_image_list[num][2] == -1) {
 190                 // no size information, use our pessimal guess
 191                 adjusted_size = max_image_size(screen_size);
 192         } else {
 193                 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
 194         }
 195
 196         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
 197
 198         if (element_id == "image") {
 199                 // we want to shrink the box as much as possible if we know the true
 200                 // size of the image
 201                 center_image(num);
 202
 203                 // replace the anchor part (if any) with the image number
 204                 window.location.hash = "#" + (num+1);
 205         }
 206
 207         return img;
 208 }
 209
 210 function prepare_preload(img, num)
 211 {
 212         // cancel any pending preload
 213         var preload = document.getElementById("preload");
 214         if (preload !== null) {
 215                 preload.parentNode.removeChild(preload);
 216         }
 217
 218         var preload_box = document.getElementById("preload_box");
 219         if (preload_box !== null) {
 220                 preload_box.parentNode.removeChild(preload_box);
 221         }
 222
 223         // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
 224         // completeness first; should at least be _somewhat_ better
 225         if (img.complete) {
 226                 display_image_num(num, "preload");
 227         } else {
 228                 img.onload = function() { display_image_num(num, "preload"); };
 229         }
 230 }
 231
 232 function can_go_next()
 233 {
 234         return (global_image_num < global_image_list.length - 1);
 235 }
 236
 237 function can_go_previous()
 238 {
 239         return (global_image_num > 0);
 240 }
 241
 242 function set_opacity(id, amount)
 243 {
 244         var elem = document.getElementById(id);
 245
 246         // If optionmenu is visible, options is also visible.
 247         if (id === "options" && amount < 0.7) {
 248                 var optionmenu = document.getElementById("optionmenu");
 249                 if (optionmenu.style.display === "block") {
 250                         amount = 0.7;
 251                 }
 252         }
 253         elem.style.opacity = amount;
 254 }
 255
 256 function center_image(num)
 257 {
 258         var screen_size = find_width();
 259         var dpr = find_dpr();
 260         var width, height;
 261
 262         if (global_image_list[num][2] == -1) {
 263                 // no size information, use our pessimal guess
 264                 var adjusted_size = max_image_size(screen_size);
 265                 width = adjusted_size[0];
 266                 height = adjusted_size[1];
 267         } else {
 268                 // use the exact information
 269                 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
 270                 width = adjusted_size[2];
 271                 height = adjusted_size[3];
 272         }
 273
 274         // center the image on-screen
 275         var main = document.getElementById("main");
 276         main.style.position = "absolute";
 277         main.style.left = (((screen_size[0] - width) / 2) / dpr) + "px";
 278         main.style.top = (((screen_size[1] - height) / 2) / dpr) + "px";
 279         main.style.width = (width / dpr) + "px";
 280         main.style.height = (height / dpr) + "px";
 281         main.style.lineHeight = (height / dpr) + "px";
 282 }
 283
 284 function relayout()
 285 {
 286         var img = display_image_num(global_image_num, "image");
 287         if (can_go_next()) {
 288                 prepare_preload(img, global_image_num + 1);
 289         }
 290
 291         set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
 292         set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
 293         set_opacity("close", global_default_opacity);
 294         set_opacity("options", global_default_opacity);
 295 }
 296
 297 function go_previous()
 298 {
 299         if (!can_go_previous()) {
 300                 return;
 301         }
 302
 303         var img = display_image_num(--global_image_num, "image");
 304         if (can_go_previous()) {
 305                 set_opacity("previous", global_default_opacity);
 306                 prepare_preload(img, global_image_num - 1);
 307         } else {
 308                 set_opacity("previous", global_disabled_opacity);
 309         }
 310         set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
 311 }
 312
 313 function go_next()
 314 {
 315         if (!can_go_next()) {
 316                 return;
 317         }
 318
 319         var img = display_image_num(++global_image_num, "image");
 320         if (can_go_next()) {
 321                 set_opacity("next", global_default_opacity);
 322                 prepare_preload(img, global_image_num + 1);
 323         } else {
 324                 set_opacity("next", global_disabled_opacity);
 325         }
 326         set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
 327 }
 328
 329 function do_close()
 330 {
 331         if (global_image_num > 0) {
 332                 window.location = global_return_url + '#' + (global_image_num + 1);
 333         } else {
 334                 window.location = global_return_url;
 335         }
 336 }
 337
 338 function toggle_optionmenu()
 339 {
 340         var optionmenu = document.getElementById("optionmenu");
 341         if (optionmenu.style.display === "block") {
 342                 optionmenu.style.display = "none";
 343         } else {
 344                 optionmenu.style.display = "block";
 345                 set_opacity("options", 0.7);
 346         }
 347 }
 348 window['toggle_optionmenu'] = toggle_optionmenu;
 349
 350 function draw_text(msg)
 351 {
 352         // remove any text we might have left
 353         var text = document.getElementById("text");
 354         if (text !== null) {
 355                 text.parentNode.removeChild(text);
 356         }
 357
 358         text = document.createElement("p");
 359         text.id = "text";
 360         text.style.position = "absolute";
 361         text.style.color = "white";
 362         text.style.lineHeight = "24px";
 363         text.style.font = "24px verdana, arial, sans-serif";
 364         text.innerHTML = msg;
 365
 366         var main = document.getElementById("main");
 367         main.appendChild(text);
 368
 369         text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
 370         text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
 371 }
 372
 373 function fade_text(opacity)
 374 {
 375         set_opacity("text", opacity);
 376         if (opacity > 0.0) {
 377                 opacity -= 0.03;
 378                 if (opacity < 0.0) {
 379                         opacity = 0.0;
 380                 }
 381                 setTimeout("fade_text(" + opacity + ")", 30);
 382         } else {
 383                 var text = document.getElementById("text");
 384                 if (text !== null) {
 385                         text.parentNode.removeChild(text);
 386                 }
 387         }
 388 }
 389
 390 function select_image(evt, filename, selected)
 391 {
 392         if (selected) {
 393                 draw_text("Selecting " + filename + "...");
 394         } else {
 395                 draw_text("Unselecting " + filename + "...");
 396         }
 397
 398         var req = new XMLHttpRequest();
 399         req.open("POST", window.location.origin + "/select", false);
 400         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 401         req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
 402
 403         setTimeout("fade_text(0.99)", 30);
 404 }
 405
 406 function key_down(which)
 407 {
 408         if (which == 39) {   // right
 409                 if (can_go_next()) {
 410                         set_opacity("next", global_highlight_opacity);
 411                 }
 412         } else if (which == 37) {   // left
 413                 if (can_go_previous()) {
 414                         set_opacity("previous", global_highlight_opacity);
 415                 }
 416         } else if (which == 27) {   // escape
 417                 set_opacity("close", global_higlight_opacity);
 418         } else {
 419                 check_for_hash_change();
 420         }
 421 }
 422
 423 function key_up(which) {
 424         if (which == 39) {   // right
 425                 if (can_go_next()) {
 426                         set_opacity("next", global_default_opacity);
 427                         go_next();
 428                 }
 429         } else if (which == 37) {   // left
 430                 if (can_go_previous()) {
 431                         set_opacity("previous", global_default_opacity);
 432                         go_previous();
 433                 }
 434         } else if (which == 27) {   // escape
 435                 set_opacity("close", global_default_opacity);
 436                 do_close();
 437         } else if (which == 32 && global_select) {   // space
 438                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
 439         } else if (which == 85 && global_select) {   // u
 440                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
 441         } else {
 442                 check_for_hash_change();
 443         }
 444 }
 445
 446 function parse_image_num(default_value) {
 447         var num = parseInt(window.location.hash.substr(1));
 448         if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
 449                 return (num - 1);
 450         } else {
 451                 return default_value;
 452         }
 453 }
 454 window['parse_image_num'] = parse_image_num;
 455
 456 function check_for_hash_change() {
 457         var num = parse_image_num(-1);
 458         if (num != -1 && num != global_image_num) {
 459                 global_image_num = num;
 460                 relayout();
 461         }
 462 }
 463
 464 function toggle_immersive() {
 465         if (global_default_opacity == 0.7) {
 466                 global_disabled_opacity = 0.0;
 467                 global_default_opacity = 0.0;
 468                 global_highlight_opacity = 0.2;
 469                 global_infobox = false;
 470                 document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
 471         } else {
 472                 global_disabled_opacity = 0.1;
 473                 global_default_opacity = 0.7;
 474                 global_highlight_opacity = 1.0;
 475                 global_infobox = true;
 476                 document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';
 477         }
 478         relayout();
 479 }
 480 window['toggle_immersive'] = toggle_immersive;
 481
 482 window.onload = function() {
 483         relayout();
 484         setInterval(check_for_hash_change, 1000);
 485
 486         var body = document.body;
 487         body.onresize = function() { relayout(); };
 488         body.onkeydown = function() { key_down(event.keyCode); };
 489         body.onkeyup = function() { key_up(event.keyCode); };
 490         body.onhashchange = function() { check_for_hash_change(); };
 491         body.onclick = function() { check_for_hash_change(); };
 492
 493         var previous = document.getElementById('previous');
 494         previous.onmousedown = function() { if (can_go_previous()) { set_opacity('previous', global_highlight_opacity); } };
 495         previous.onmouseup = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); go_previous(); } };
 496         previous.onmouseout = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); } };
 497
 498         var next = document.getElementById('next');
 499         next.onmousedown = function() { if (can_go_next()) { set_opacity('next', global_highlight_opacity); } };
 500         next.onmouseup = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); go_next(); } };
 501         next.onmouseout = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); } };
 502
 503         var close = document.getElementById('close');
 504         close.onmousedown = function() { set_opacity('close', global_highlight_opacity); };
 505         close.onmouseup = function() { set_opacity('close', global_default_opacity); do_close(); };
 506         close.onmouseout = function() { set_opacity('close', global_default_opacity); };
 507
 508         var options = document.getElementById('options');
 509         options.onmousedown = function() { set_opacity('options', global_highlight_opacity); };
 510         options.onmouseup = function() { set_opacity('options', global_default_opacity); toggle_optionmenu(); };
 511         options.onmouseout = function() { set_opacity('options', global_default_opacity); };
 512 };
 513
 514 })();