git.sesse.net Git - pr0n/blob - files/pr0n-fullscreen.js

   1 var req;
   2
   3 function init_ajax()
   4 {
   5         req = false;
   6
   7         if (window.XMLHttpRequest) {
   8                 // Mozilla/Safari
   9                 try {
  10                         req = new XMLHttpRequest();
  11                 } catch(e) {
  12                         req = false;
  13                 }
  14         } else if (window.ActiveXObject) {
  15                 // IE/Windows
  16                 try {
  17                         req = new ActiveXObject("Msxml2.XMLHTTP");
  18                 } catch(e) {
  19                         try {
  20                                 req = new ActiveXObject("Microsoft.XMLHTTP");
  21                         } catch(e) {
  22                                 req = false;
  23                         }
  24                 }
  25         }
  26 }
  27
  28 function find_width()
  29 {
  30         if (typeof(window.innerWidth) == 'number') {
  31                 // non-IE
  32                 return [window.innerWidth, window.innerHeight];
  33         } else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
  34                 // IE 6+ in 'standards compliant mode'
  35                 return [document.documentElement.clientWidth, document.documentElement.clientHeight];
  36         } else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {
  37                 // IE 4-compatible
  38                 return [document.body.clientWidth, document.body.clientHeight];
  39         }
  40         return [null,null];
  41 }
  42
  43 /*
  44  * pr0n can resize to any size we'd like, but we're much more likely
  45  * to have this set of fixed-resolution screens cached, so to increase
  46  * performance, we round down to the closest fit and use that.
  47  */
  48 function reduce_to_fixed_width(size)
  49 {
  50         var fixed_sizes = [
  51                 [ 1280, 960 ],
  52                 [ 1024, 768 ],
  53                 [ 800, 600 ],
  54                 [ 640, 480 ],
  55                 [ 512, 384 ],
  56                 [ 320, 256 ],
  57                 [ 240, 192 ],
  58                 [ 120, 96 ],
  59                 [ 80, 64 ]
  60         ];
  61         var i;
  62         for (i = 0; i < fixed_sizes.length; ++i) {
  63                 if (size[0] >= fixed_sizes[i][0] && size[1] >= fixed_sizes[i][1]) {
  64                         return fixed_sizes[i];
  65                 }
  66         }
  67         return [ 80, 64 ];
  68 }
  69
  70 function display_image(width, height, evt, filename, element_id)
  71 {
  72         var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/" + global_infobox + filename;
  73         var img = document.getElementById(element_id);
  74         if (img !== null) {
  75                 img.src = "data:";
  76                 img.parentNode.removeChild(img);
  77         }
  78
  79         img = document.createElement("img");
  80         img.id = element_id;
  81         img.alt = "";
  82
  83         if (img.src != url) {
  84                 img.src = url;
  85         }
  86
  87         var main = document.getElementById("iehack");
  88         main.appendChild(img);
  89
  90         return img;
  91 }
  92
  93 function prepare_preload(img, width, height, evt, filename)
  94 {
  95         // cancel any pending preload
  96         var preload = document.getElementById("preload");
  97         if (preload !== null) {
  98                 preload.src = "data:";
  99                 preload.parentNode.removeChild(preload);
 100         }
 101
 102         // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
 103         // completeness first; should at least be _somewhat_ better
 104         if (img.complete) {
 105                 display_image(width, height, evt, filename, "preload");
 106         } else {
 107                 img.onload = function() { display_image(width, height, evt, filename, "preload"); };
 108         }
 109 }
 110
 111 function can_go_next()
 112 {
 113         return (global_image_num < global_image_list.length - 1);
 114 }
 115
 116 function can_go_previous()
 117 {
 118         return (global_image_num > 0);
 119 }
 120
 121 function set_opacity(id, amount)
 122 {
 123         var elem = document.getElementById(id);
 124         if (typeof(elem.style.opacity) != 'undefined') {            // W3C
 125                 elem.style.opacity = amount;
 126         } else if (typeof(elem.style.mozOpacity) != 'undefined') {  // older Mozilla
 127                 elem.style.mozOpacity = amount;
 128         } else if (typeof(elem.style.filter) != 'undefined') {      // IE
 129                 if (elem.style.filter.indexOf("alpha") == -1) {
 130                         // add an alpha filter if there isn't one already
 131                         if (elem.style.filter) {
 132                                 elem.style.filter += " ";
 133                         } else {
 134                                 elem.style.filter = "";
 135                         }
 136                         elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
 137                 } else {
 138                         // ugh? this seems to break in color index mode...
 139                         if (typeof(elem.filters) == 'unknown') {
 140                                 elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
 141                         } else {
 142                                 elem.filters.alpha.opacity = (amount * 100.0);
 143                         }
 144                 }
 145         } else {                             // no alpha support
 146                 if (amount > 0.5) {
 147                         elem.style.visibility = "visible";
 148                         elem.style.zorder = 1;
 149                 } else {
 150                         elem.style.visibility = "hidden";
 151                 }
 152         }
 153 }
 154
 155 function relayout()
 156 {
 157         var size = find_width();
 158         var adjusted_size = reduce_to_fixed_width(size);
 159
 160         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[global_image_num][0], global_image_list[global_image_num][1], "image");
 161         if (can_go_next()) {
 162                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_image_list[global_image_num + 1][0], global_image_list[global_image_num + 1]);
 163         }
 164
 165         // center the image on-screen
 166         var main = document.getElementById("main");
 167         main.style.position = "absolute";
 168         main.style.left = (size[0] - adjusted_size[0]) / 2 + "px";
 169         main.style.top = (size[1] - adjusted_size[1]) / 2 + "px";
 170         main.style.width = adjusted_size[0] + "px";
 171         main.style.height = adjusted_size[1] + "px";
 172         main.style.lineHeight = adjusted_size[1] + "px";
 173
 174         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
 175         set_opacity("next", can_go_next() ? 0.7 : 0.1);
 176         set_opacity("close", 0.7);
 177 }
 178
 179 function go_previous()
 180 {
 181         if (!can_go_previous()) {
 182                 return;
 183         }
 184
 185         --global_image_num;
 186
 187         var adjusted_size = reduce_to_fixed_width(find_width());
 188
 189         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[global_image_num][0], global_image_list[global_image_num][1], "image");
 190         if (can_go_previous()) {
 191                 set_opacity("previous", 0.7);
 192                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_image_list[global_image_num - 1][0], global_image_list[global_image_num - 1][1]);
 193         } else {
 194                 set_opacity("previous", 0.1);
 195         }
 196         set_opacity("next", can_go_next() ? 0.7 : 0.1);
 197 }
 198
 199 function go_next()
 200 {
 201         if (!can_go_next()) {
 202                 return;
 203         }
 204
 205         ++global_image_num;
 206
 207         var adjusted_size = reduce_to_fixed_width(find_width());
 208
 209         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[global_image_num][0], global_image_list[global_image_num][1], "image");
 210         if (can_go_next()) {
 211                 set_opacity("next", 0.7);
 212                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_image_list[global_image_num + 1][0], global_image_list[global_image_num + 1][1]);
 213         } else {
 214                 set_opacity("next", 0.1);
 215         }
 216         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
 217 }
 218
 219 function do_close()
 220 {
 221         window.location = global_return_url;
 222 }
 223
 224 function draw_text(msg)
 225 {
 226         // remove any text we might have left
 227         var text = document.getElementById("text");
 228         if (text !== null) {
 229                 text.parentNode.removeChild(text);
 230         }
 231
 232         text = document.createElement("p");
 233         text.id = "text";
 234         text.style.position = "absolute";
 235         text.style.color = "white";
 236         text.style.lineHeight = "24px";
 237         text.style.font = "24px verdana, arial, sans-serif";
 238         text.innerHTML = msg;
 239
 240         var main = document.getElementById("main");
 241         main.appendChild(text);
 242
 243         text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
 244         text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
 245 }
 246
 247 function fade_text(opacity)
 248 {
 249         set_opacity("text", opacity);
 250         if (opacity > 0.0) {
 251                 opacity -= 0.03;
 252                 if (opacity < 0.0) {
 253                         opacity = 0.0;
 254                 }
 255                 setTimeout("fade_text(" + opacity + ")", 30);
 256         } else {
 257                 var text = document.getElementById("text");
 258                 if (text !== null) {
 259                         text.parentNode.removeChild(text);
 260                 }
 261         }
 262 }
 263
 264 function select_image(evt, filename)
 265 {
 266         if (!req) {
 267                 return;
 268         }
 269
 270         draw_text("Selecting " + filename + "...");
 271
 272         req.open("POST", "http://" + global_vhost + "/select", false);
 273         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 274         req.send("mode=single&event=" + evt + "&filename=" + filename);
 275
 276         setTimeout("fade_text(0.99)", 30);
 277 }
 278
 279 function key_down(which)
 280 {
 281         if (which == 39) {   // right
 282                 if (can_go_next()) {
 283                         set_opacity("next", 0.99);
 284                 }
 285         } else if (which == 37) {   // left
 286                 if (can_go_previous()) {
 287                         set_opacity("previous", 0.99);
 288                 }
 289         } else if (which == 27) {   // escape
 290                 set_opacity("close", 0.99);
 291         }
 292 }
 293
 294 function key_up(which) {
 295         if (which == 39) {   // right
 296                 if (can_go_next()) {
 297                         set_opacity("next", 0.7);
 298                         go_next();
 299                 }
 300         } else if (which == 37) {   // left
 301                 if (can_go_previous()) {
 302                         set_opacity("previous", 0.7);
 303                         go_previous();
 304                 }
 305         } else if (which == 27) {   // escape
 306                 set_opacity("close", 0.7);
 307                 do_close();
 308         } else if (which == 32 && global_select) {   // space
 309                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1]);
 310         }
 311 }
 312
 313 // enable the horrible horrible IE PNG hack
 314 function ie_png_hack()
 315 {
 316         var vstr = navigator.appVersion.split("MSIE");
 317         var v = parseFloat(vstr[1]);
 318         if (v >= 5.5 && v < 7.0 && document.body.filters) {
 319                 var next = document.getElementById("next");
 320                 next.outerHTML = "<span id=\"next\" style=\"display: inline-block; position: absolute; bottom: 0px; right: 0px; width: 50px; height: 50px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + next.src + "')\" onmousedown=\"if (can_go_next()) set_opacity('next', 1.0)\" onmouseup=\"if (can_go_next()) { set_opacity('next', 0.7); go_next(); }\" onmouseout=\"if (can_go_next()) { set_opacity('next', 0.7); }\" />";
 321
 322                 var previous = document.getElementById("previous");
 323                 previous.outerHTML = "<span id=\"previous\" style=\"display: inline-block; position: absolute; bottom: 0px; right: 0px; width: 50px; height: 50px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + previous.src + "')\" onmousedown=\"if (can_go_previous()) set_opacity('previous', 1.0)\" onmouseup=\"if (can_go_previous()) { set_opacity('previous', 0.7); go_previous(); }\" onmouseout=\"if (can_go_previous()) { set_opacity('previous', 0.7); }\" />";
 324
 325                 var close = document.getElementById("close");
 326                 close.outerHTML = "<span id=\"close\" style=\"display: inline-block; position: absolute; top: 0px; right: 0px; width: 50px; height: 50px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + close.src + "')\" onmousedown=\"set_opacity('close', 1.0)\" onmouseup=\"set_opacity('close', 0.7); do_close();\" onmouseout=\"set_opacity('close', 0.7);\" />";
 327         }
 328 }