Unbroke infobox=0 for fullscreen mode.
[pr0n] / 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. This 
47  * function is a pessimal estimate of what thumbnail size we can _always_
48  * fit on the screen -- it's right if and only if all images are 4:3
49  * (and landscape). If individual size information is available, use
50  * pick_image_size, below.
51  */
52 var fixed_sizes = [
53         [ 2048, 1536 ],
54         [ 1920, 1440 ],
55         [ 1600, 1200 ],
56         [ 1400, 1050 ],
57         [ 1280, 960 ],
58         [ 1152, 864 ],
59         [ 1024, 768 ],
60         [ 800, 600 ],
61         [ 640, 480 ],
62         [ 512, 384 ],
63         [ 320, 256 ],
64         [ 240, 192 ],
65         [ 120, 96 ],
66         [ 80, 64 ]
67 ];
68 function max_image_size(screen_size)
69 {
70         var i;
71         for (i = 0; i < fixed_sizes.length; ++i) {
72                 if (screen_size[0] >= fixed_sizes[i][0] && screen_size[1] >= fixed_sizes[i][1]) {
73                         return fixed_sizes[i];
74                 }
75         }
76         return [ 80, 64 ];
77 }
78
79 function pick_image_size(screen_size, image_size)
80 {
81         var i;
82         for (i = 0; i < fixed_sizes.length; ++i) {
83                 // this is a duplicate of pr0n's resizing code, hope for no floating-point
84                 // inaccuracies :-)
85                 var thumbxres = fixed_sizes[i][0];
86                 var thumbyres = fixed_sizes[i][1];
87                 var width = image_size[0];
88                 var height = image_size[1];
89
90                 if (!(thumbxres >= width && thumbyres >= height)) {
91                         var sfh = width / thumbxres;
92                         var sfv = height / thumbyres;
93                         if (sfh > sfv) {
94                                 width  /= sfh;
95                                 height /= sfh;
96                         } else {
97                                 width  /= sfv;
98                                 height /= sfv;
99                         }
100                         width = Math.floor(width);
101                         height = Math.floor(height);
102                 }
103
104                 if (screen_size[0] >= width && screen_size[1] >= height) {
105                         // be sure _not_ to return a reference
106                         return [ fixed_sizes[i][0], fixed_sizes[i][1], width, height ];
107                 }
108         }
109         return [ 80, 64 ];
110 }
111
112 function replace_image_element(url, element_id, parent_node)
113 {
114         var img = document.getElementById(element_id);
115         if (img !== null) {
116                 img.src = "data:";
117                 img.parentNode.removeChild(img);
118         }
119
120         img = document.createElement("img");
121         img.id = element_id;
122         img.alt = "";
123
124         if (img.src != url) {
125                 img.src = url;
126         }
127         
128         parent_node.appendChild(img);
129         return img;
130 }
131
132 function display_image(width, height, evt, filename, element_id)
133 {
134         var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/nobox/" + filename;
135         var main = document.getElementById("iehack");
136         var img = replace_image_element(url, element_id, main);
137
138         if (global_infobox != 'nobox/') {
139                 var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
140                 var boximg = replace_image_element(url, element_id + "_box", main);
141
142                 boximg.style.position = "absolute";
143                 boximg.style.left = "0px";
144                 boximg.style.bottom = "-1px";
145         }
146
147         return img;
148 }
149
150 function display_image_num(num, element_id)
151 {
152         var screen_size = find_width();
153         var adjusted_size;
154
155         if (global_image_list[num][2] == -1) {
156                 // no size information, use our pessimal guess
157                 adjusted_size = max_image_size(screen_size);
158         } else {
159                 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
160         }
161
162         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
163         
164         if (element_id == "image") {
165                 // we want to shrink the box as much as possible if we know the true
166                 // size of the image
167                 center_image(num);
168                 
169                 // replace the anchor part (if any) with the image number
170                 window.location.hash = "#" + (num+1);
171         }
172
173         return img;
174 }
175
176 function prepare_preload(img, num)
177 {
178         // cancel any pending preload
179         var preload = document.getElementById("preload");
180         if (preload !== null) {
181                 preload.src = "data:";
182                 preload.parentNode.removeChild(preload);
183         }
184         
185         var preload_box = document.getElementById("preload_box");
186         if (preload_box !== null) {
187                 preload_box.src = "data:";
188                 preload_box.parentNode.removeChild(preload_box);
189         }
190
191         // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
192         // completeness first; should at least be _somewhat_ better
193         if (img.complete) {
194                 display_image_num(num, "preload");
195         } else {
196                 img.onload = function() { display_image_num(num, "preload"); };
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         if (typeof(elem.style.opacity) != 'undefined') {            // W3C
214                 elem.style.opacity = amount;
215         } else if (typeof(elem.style.mozOpacity) != 'undefined') {  // older Mozilla
216                 elem.style.mozOpacity = amount;
217         } else if (typeof(elem.style.filter) != 'undefined') {      // IE
218                 if (elem.style.filter.indexOf("alpha") == -1) {
219                         // add an alpha filter if there isn't one already
220                         if (elem.style.filter) {
221                                 elem.style.filter += " ";
222                         } else {
223                                 elem.style.filter = "";
224                         }
225                         elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
226                 } else {        
227                         // ugh? this seems to break in color index mode...
228                         if (typeof(elem.filters) == 'unknown') {
229                                 elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
230                         } else {
231                                 elem.filters.alpha.opacity = (amount * 100.0);
232                         }
233                 }
234         } else {                             // no alpha support
235                 if (amount > 0.5) {
236                         elem.style.visibility = "visible";
237                         elem.style.zorder = 1;
238                 } else {
239                         elem.style.visibility = "hidden";
240                 }
241         }
242 }
243
244 function center_image(num)
245 {
246         var screen_size = find_width();
247         var width, height;
248         
249         if (global_image_list[num][2] == -1) {
250                 // no size information, use our pessimal guess
251                 var adjusted_size = max_image_size(screen_size);
252                 width = adjusted_size[0];
253                 height = adjusted_size[1];
254         } else {
255                 // use the exact information
256                 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
257                 width = adjusted_size[2];
258                 height = adjusted_size[3];
259         }
260
261         // center the image on-screen
262         var main = document.getElementById("main");
263         main.style.position = "absolute";
264         main.style.left = (screen_size[0] - width) / 2 + "px";
265         main.style.top = (screen_size[1] - height) / 2 + "px"; 
266         main.style.width = width + "px";
267         main.style.height = height + "px";
268         main.style.lineHeight = height + "px";
269 }
270
271 function relayout()
272 {
273         var img = display_image_num(global_image_num, "image");
274         if (can_go_next()) {
275                 prepare_preload(img, global_image_num + 1);
276         }
277
278         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
279         set_opacity("next", can_go_next() ? 0.7 : 0.1);
280         set_opacity("close", 0.7);
281 }
282
283 function go_previous()
284 {
285         if (!can_go_previous()) {
286                 return;
287         }
288
289         var img = display_image_num(--global_image_num, "image");
290         if (can_go_previous()) {
291                 set_opacity("previous", 0.7);
292                 prepare_preload(img, global_image_num - 1);
293         } else {
294                 set_opacity("previous", 0.1);
295         }
296         set_opacity("next", can_go_next() ? 0.7 : 0.1);
297 }
298
299 function go_next()
300 {
301         if (!can_go_next()) {
302                 return;
303         }
304
305         var img = display_image_num(++global_image_num, "image");
306         if (can_go_next()) {
307                 set_opacity("next", 0.7);
308                 prepare_preload(img, global_image_num + 1);
309         } else {
310                 set_opacity("next", 0.1);
311         }
312         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
313 }
314
315 function do_close()
316 {
317         window.location = global_return_url;
318 }
319
320 function draw_text(msg)
321 {
322         // remove any text we might have left
323         var text = document.getElementById("text");
324         if (text !== null) {
325                 text.parentNode.removeChild(text);
326         }
327
328         text = document.createElement("p");
329         text.id = "text";
330         text.style.position = "absolute";
331         text.style.color = "white";
332         text.style.lineHeight = "24px";
333         text.style.font = "24px verdana, arial, sans-serif";
334         text.innerHTML = msg;
335
336         var main = document.getElementById("main");
337         main.appendChild(text);
338
339         text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
340         text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
341 }
342
343 function fade_text(opacity)
344 {
345         set_opacity("text", opacity);
346         if (opacity > 0.0) {
347                 opacity -= 0.03;
348                 if (opacity < 0.0) {
349                         opacity = 0.0;
350                 }
351                 setTimeout("fade_text(" + opacity + ")", 30);
352         } else {
353                 var text = document.getElementById("text");
354                 if (text !== null) {
355                         text.parentNode.removeChild(text);
356                 }
357         }
358 }
359
360 function select_image(evt, filename)
361 {
362         if (!req) {
363                 return;
364         }
365
366         draw_text("Selecting " + filename + "...");
367         
368         req.open("POST", "http://" + global_vhost + "/select", false);
369         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
370         req.send("mode=single&event=" + evt + "&filename=" + filename);
371
372         setTimeout("fade_text(0.99)", 30);
373 }
374
375 function key_down(which)
376 {
377         if (which == 39) {   // right
378                 if (can_go_next()) {
379                         set_opacity("next", 0.99);
380                 }
381         } else if (which == 37) {   // left
382                 if (can_go_previous()) {
383                         set_opacity("previous", 0.99);
384                 }
385         } else if (which == 27) {   // escape
386                 set_opacity("close", 0.99);
387         } else {
388                 check_for_hash_change();
389         }
390 }
391
392 function key_up(which) {
393         if (which == 39) {   // right
394                 if (can_go_next()) {
395                         set_opacity("next", 0.7);
396                         go_next();
397                 }
398         } else if (which == 37) {   // left
399                 if (can_go_previous()) {
400                         set_opacity("previous", 0.7);
401                         go_previous();
402                 }
403         } else if (which == 27) {   // escape
404                 set_opacity("close", 0.7);
405                 do_close();
406         } else if (which == 32 && global_select) {   // space
407                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1]);
408         } else {
409                 check_for_hash_change();
410         }
411 }
412
413 // enable the horrible horrible IE PNG hack
414 function ie_png_hack()
415 {
416         var vstr = navigator.appVersion.split("MSIE");
417         var v = parseFloat(vstr[1]);
418         if (v >= 5.5 && v < 7.0 && document.body.filters) {
419                 var next = document.getElementById("next");
420                 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); }\" />";
421                 
422                 var previous = document.getElementById("previous");
423                 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); }\" />";
424                 
425                 var close = document.getElementById("close");
426                 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);\" />";
427         }
428 }
429
430 function parse_image_num(default_value) {
431         var num = parseInt(window.location.hash.substr(1));
432         if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
433                 return (num - 1);
434         } else {
435                 return default_value;
436         }
437 }
438
439 function check_for_hash_change() {
440         var num = parse_image_num(-1);
441         if (num != -1 && num != global_image_num) {
442                 global_image_num = num;
443                 relayout();
444         }
445 }