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         for (i = 0; i < fixed_sizes.length; ++i) {
  62                 if (size[0] >= fixed_sizes[i][0] && size[1] >= fixed_sizes[i][1])
  63                         return fixed_sizes[i];
  64         }
  65         return [ 80, 64 ];
  66 }
  67
  68 function display_image(width, height, evt, filename, element_id)
  69 {
  70         var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/" + filename;
  71         var img = document.getElementById(element_id);
  72         if (img != null) {
  73                 img.src = "data:";
  74                 img.parentNode.removeChild(img);
  75         }
  76
  77         img = document.createElement("img");
  78         img.id = element_id;
  79         img.alt = "";
  80
  81         if (img.src != url) {
  82                 img.src = url;
  83         }
  84
  85         var main = document.getElementById("iehack");
  86         main.appendChild(img);
  87
  88         return img;
  89 }
  90
  91 function prepare_preload(img, width, height, evt, filename)
  92 {
  93         // cancel any pending preload
  94         var preload = document.getElementById("preload");
  95         if (preload != null) {
  96                 preload.src = "data:";
  97                 preload.parentNode.removeChild(preload);
  98         }
  99
 100         // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
 101         // completeness first; should at least be _somewhat_ better
 102         if (img.complete) {
 103                 display_image(width, height, evt, filename, "preload");
 104         } else {
 105                 img.onload = function() { display_image(width, height, evt, filename, "preload"); };
 106         }
 107 }
 108
 109 function relayout()
 110 {
 111         var size = find_width();
 112         var adjusted_size = reduce_to_fixed_width(size);
 113
 114         var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
 115         if (can_go_next()) {
 116                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num + 1]);
 117         }
 118
 119         // center the image on-screen
 120         var main = document.getElementById("main");
 121         main.style.position = "absolute";
 122         main.style.left = (size[0] - adjusted_size[0]) / 2 + "px";
 123         main.style.top = (size[1] - adjusted_size[1]) / 2 + "px";
 124         main.style.width = adjusted_size[0] + "px";
 125         main.style.height = adjusted_size[1] + "px";
 126         main.style.lineHeight = adjusted_size[1] + "px";
 127
 128         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
 129         set_opacity("next", can_go_next() ? 0.7 : 0.1);
 130         set_opacity("close", 0.7);
 131 }
 132
 133 function set_opacity(id, amount)
 134 {
 135         var elem = document.getElementById(id);
 136         if (typeof(elem.style.opacity) != 'undefined') {            // W3C
 137                 elem.style.opacity = amount;
 138         } else if (typeof(elem.style.mozOpacity) != 'undefined') {  // older Mozilla
 139                 elem.style.mozOpacity = amount;
 140         } else if (typeof(elem.style.filter) != 'undefined') {      // IE
 141                 if (elem.style.filter.indexOf("alpha") == -1) {
 142                         // add an alpha filter if there isn't one already
 143                         if (elem.style.filter) {
 144                                 elem.style.filter += " ";
 145                         } else {
 146                                 elem.style.filter = "";
 147                         }
 148                         elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
 149                 } else {
 150                         // ugh? this seems to break in color index mode...
 151                         if (typeof(elem.filters) == 'unknown') {
 152                                 elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
 153                         } else {
 154                                 elem.filters.alpha.opacity = (amount * 100.0);
 155                         }
 156                 }
 157         } else {                             // no alpha support
 158                 if (amount > 0.5) {
 159                         elem.style.visibility = "visible";
 160                         elem.style.zorder = 1;
 161                 } else {
 162                         elem.style.visibility = "hidden";
 163                 }
 164         }
 165 }
 166
 167 function can_go_previous()
 168 {
 169         return (global_image_num > 0);
 170 }
 171
 172 function go_previous()
 173 {
 174         if (!can_go_previous())
 175                 return;
 176
 177         --global_image_num;
 178
 179         var adjusted_size = reduce_to_fixed_width(find_width());
 180
 181         var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
 182         if (can_go_previous()) {
 183                 set_opacity("previous", 0.7);
 184                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num - 1]);
 185         } else {
 186                 set_opacity("previous", 0.1);
 187         }
 188         set_opacity("next", can_go_next() ? 0.7 : 0.1);
 189 }
 190
 191 function can_go_next()
 192 {
 193         return (global_image_num < global_image_list.length - 1);
 194 }
 195
 196 function go_next()
 197 {
 198         if (!can_go_next())
 199                 return;
 200
 201         ++global_image_num;
 202
 203         var adjusted_size = reduce_to_fixed_width(find_width());
 204
 205         var img = display_image(adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num], "image");
 206         if (can_go_next()) {
 207                 set_opacity("next", 0.7);
 208                 prepare_preload(img, adjusted_size[0], adjusted_size[1], global_evt, global_image_list[global_image_num + 1]);
 209         } else {
 210                 set_opacity("next", 0.1);
 211         }
 212         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
 213 }
 214
 215 function key_down(which)
 216 {
 217         if (which == 39) {   // right
 218                 if (can_go_next()) {
 219                         set_opacity("next", 0.99);
 220                 }
 221         } else if (which == 37) {   // left
 222                 if (can_go_previous()) {
 223                         set_opacity("previous", 0.99);
 224                 }
 225         } else if (which == 27) {   // escape
 226                 set_opacity("close", 0.99);
 227         }
 228 }
 229
 230 function key_up(which) {
 231         if (which == 39) {   // right
 232                 if (can_go_next()) {
 233                         set_opacity("next", 0.7);
 234                         go_next();
 235                 }
 236         } else if (which == 37) {   // left
 237                 if (can_go_previous()) {
 238                         set_opacity("previous", 0.7);
 239                         go_previous();
 240                 }
 241         } else if (which == 27) {   // escape
 242                 set_opacity("close", 0.7);
 243                 do_close();
 244         } else if (which == 32 && global_select) {   // space
 245                 select_image(global_image_list[global_image_num]);
 246         }
 247 }
 248
 249 function select_image(filename)
 250 {
 251         if (!req)
 252                 return;
 253
 254         draw_text("Selecting " + filename + "...");
 255
 256         req.open("POST", "http://" + global_vhost + "/select", false);
 257         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 258         req.send("mode=single&event=" + global_evt + "&filename=" + filename);
 259
 260         setTimeout("fade_text(0.99)", 30);
 261 }
 262
 263 function fade_text(opacity)
 264 {
 265         set_opacity("text", opacity);
 266         if (opacity > 0.0) {
 267                 opacity -= 0.03;
 268                 if (opacity < 0.0)
 269                         opacity = 0.0;
 270                 setTimeout("fade_text(" + opacity + ")", 30);
 271         } else {
 272                 var text = document.getElementById("text");
 273                 if (text != null) {
 274                         text.parentNode.removeChild(text);
 275                 }
 276         }
 277 }
 278
 279 function do_close()
 280 {
 281         window.location = global_return_url;
 282 }
 283
 284 function draw_text(msg)
 285 {
 286         // remove any text we might have left
 287         var text = document.getElementById("text");
 288         if (text != null) {
 289                 text.parentNode.removeChild(text);
 290         }
 291
 292         text = document.createElement("p");
 293         text.id = "text";
 294         text.style.position = "absolute";
 295         text.style.color = "white";
 296         text.style.lineHeight = "24px";
 297         text.style.font = "24px verdana, arial, sans-serif";
 298         text.innerHTML = msg;
 299
 300         var main = document.getElementById("main");
 301         main.appendChild(text);
 302
 303         text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
 304         text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
 305 }
 306
 307 // enable the horrible horrible IE PNG hack
 308 function ie_png_hack()
 309 {
 310         var vstr = navigator.appVersion.split("MSIE");
 311         var v = parseFloat(vstr[1]);
 312         if (v >= 5.5 && v < 7.0 && document.body.filters) {
 313                 var next = document.getElementById("next");
 314                 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); }\" />";
 315
 316                 var previous = document.getElementById("previous");
 317                 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); }\" />";
 318
 319                 var close = document.getElementById("close");
 320                 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);\" />";
 321         }
 322 }