Add JavaScript support for unselecting. Also remove mode=single parameter, as it...
[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         img.style.position = "absolute";
138         img.style.left = "0px";
139         img.style.top = "0px";
140
141         if (global_infobox != 'nobox/') {
142                 var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
143                 var boximg = replace_image_element(url, element_id + "_box", main);
144
145                 boximg.style.position = "absolute";
146                 boximg.style.left = "0px";
147                 boximg.style.bottom = "-1px";
148         }
149
150         return img;
151 }
152
153 function display_image_num(num, element_id)
154 {
155         var screen_size = find_width();
156         var adjusted_size;
157
158         if (global_image_list[num][2] == -1) {
159                 // no size information, use our pessimal guess
160                 adjusted_size = max_image_size(screen_size);
161         } else {
162                 adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
163         }
164
165         var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
166         
167         if (element_id == "image") {
168                 // we want to shrink the box as much as possible if we know the true
169                 // size of the image
170                 center_image(num);
171                 
172                 // replace the anchor part (if any) with the image number
173                 window.location.hash = "#" + (num+1);
174         }
175
176         return img;
177 }
178
179 function prepare_preload(img, num)
180 {
181         // cancel any pending preload
182         var preload = document.getElementById("preload");
183         if (preload !== null) {
184                 preload.src = "data:";
185                 preload.parentNode.removeChild(preload);
186         }
187         
188         var preload_box = document.getElementById("preload_box");
189         if (preload_box !== null) {
190                 preload_box.src = "data:";
191                 preload_box.parentNode.removeChild(preload_box);
192         }
193
194         // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
195         // completeness first; should at least be _somewhat_ better
196         if (img.complete) {
197                 display_image_num(num, "preload");
198         } else {
199                 img.onload = function() { display_image_num(num, "preload"); };
200         }       
201 }
202
203 function can_go_next()
204 {
205         return (global_image_num < global_image_list.length - 1);
206 }
207
208 function can_go_previous()
209 {
210         return (global_image_num > 0);
211 }
212
213 function set_opacity(id, amount)
214 {
215         var elem = document.getElementById(id);
216         if (typeof(elem.style.opacity) != 'undefined') {            // W3C
217                 elem.style.opacity = amount;
218         } else if (typeof(elem.style.mozOpacity) != 'undefined') {  // older Mozilla
219                 elem.style.mozOpacity = amount;
220         } else if (typeof(elem.style.filter) != 'undefined') {      // IE
221                 if (elem.style.filter.indexOf("alpha") == -1) {
222                         // add an alpha filter if there isn't one already
223                         if (elem.style.filter) {
224                                 elem.style.filter += " ";
225                         } else {
226                                 elem.style.filter = "";
227                         }
228                         elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
229                 } else {        
230                         // ugh? this seems to break in color index mode...
231                         if (typeof(elem.filters) == 'unknown') {
232                                 elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
233                         } else {
234                                 elem.filters.alpha.opacity = (amount * 100.0);
235                         }
236                 }
237         } else {                             // no alpha support
238                 if (amount > 0.5) {
239                         elem.style.visibility = "visible";
240                         elem.style.zorder = 1;
241                 } else {
242                         elem.style.visibility = "hidden";
243                 }
244         }
245 }
246
247 function center_image(num)
248 {
249         var screen_size = find_width();
250         var width, height;
251         
252         if (global_image_list[num][2] == -1) {
253                 // no size information, use our pessimal guess
254                 var adjusted_size = max_image_size(screen_size);
255                 width = adjusted_size[0];
256                 height = adjusted_size[1];
257         } else {
258                 // use the exact information
259                 var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
260                 width = adjusted_size[2];
261                 height = adjusted_size[3];
262         }
263
264         // center the image on-screen
265         var main = document.getElementById("main");
266         main.style.position = "absolute";
267         main.style.left = (screen_size[0] - width) / 2 + "px";
268         main.style.top = (screen_size[1] - height) / 2 + "px"; 
269         main.style.width = width + "px";
270         main.style.height = height + "px";
271         main.style.lineHeight = height + "px";
272 }
273
274 function relayout()
275 {
276         var img = display_image_num(global_image_num, "image");
277         if (can_go_next()) {
278                 prepare_preload(img, global_image_num + 1);
279         }
280
281         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
282         set_opacity("next", can_go_next() ? 0.7 : 0.1);
283         set_opacity("close", 0.7);
284 }
285
286 function go_previous()
287 {
288         if (!can_go_previous()) {
289                 return;
290         }
291
292         var img = display_image_num(--global_image_num, "image");
293         if (can_go_previous()) {
294                 set_opacity("previous", 0.7);
295                 prepare_preload(img, global_image_num - 1);
296         } else {
297                 set_opacity("previous", 0.1);
298         }
299         set_opacity("next", can_go_next() ? 0.7 : 0.1);
300 }
301
302 function go_next()
303 {
304         if (!can_go_next()) {
305                 return;
306         }
307
308         var img = display_image_num(++global_image_num, "image");
309         if (can_go_next()) {
310                 set_opacity("next", 0.7);
311                 prepare_preload(img, global_image_num + 1);
312         } else {
313                 set_opacity("next", 0.1);
314         }
315         set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
316 }
317
318 function do_close()
319 {
320         window.location = global_return_url;
321 }
322
323 function draw_text(msg)
324 {
325         // remove any text we might have left
326         var text = document.getElementById("text");
327         if (text !== null) {
328                 text.parentNode.removeChild(text);
329         }
330
331         text = document.createElement("p");
332         text.id = "text";
333         text.style.position = "absolute";
334         text.style.color = "white";
335         text.style.lineHeight = "24px";
336         text.style.font = "24px verdana, arial, sans-serif";
337         text.innerHTML = msg;
338
339         var main = document.getElementById("main");
340         main.appendChild(text);
341
342         text.style.left = (main.clientWidth - text.clientWidth) / 2 + "px";
343         text.style.top = (main.clientHeight - text.clientHeight) / 2 + "px";
344 }
345
346 function fade_text(opacity)
347 {
348         set_opacity("text", opacity);
349         if (opacity > 0.0) {
350                 opacity -= 0.03;
351                 if (opacity < 0.0) {
352                         opacity = 0.0;
353                 }
354                 setTimeout("fade_text(" + opacity + ")", 30);
355         } else {
356                 var text = document.getElementById("text");
357                 if (text !== null) {
358                         text.parentNode.removeChild(text);
359                 }
360         }
361 }
362
363 function select_image(evt, filename, selected)
364 {
365         if (!req) {
366                 return;
367         }
368
369         if (selected) {
370                 draw_text("Selecting " + filename + "...");
371         } else {
372                 draw_text("Unselecting " + filename + "...");
373         }
374         
375         req.open("POST", "http://" + global_vhost + "/select", false);
376         req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
377         req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
378
379         setTimeout("fade_text(0.99)", 30);
380 }
381
382 function key_down(which)
383 {
384         if (which == 39) {   // right
385                 if (can_go_next()) {
386                         set_opacity("next", 0.99);
387                 }
388         } else if (which == 37) {   // left
389                 if (can_go_previous()) {
390                         set_opacity("previous", 0.99);
391                 }
392         } else if (which == 27) {   // escape
393                 set_opacity("close", 0.99);
394         } else {
395                 check_for_hash_change();
396         }
397 }
398
399 function key_up(which) {
400         if (which == 39) {   // right
401                 if (can_go_next()) {
402                         set_opacity("next", 0.7);
403                         go_next();
404                 }
405         } else if (which == 37) {   // left
406                 if (can_go_previous()) {
407                         set_opacity("previous", 0.7);
408                         go_previous();
409                 }
410         } else if (which == 27) {   // escape
411                 set_opacity("close", 0.7);
412                 do_close();
413         } else if (which == 32 && global_select) {   // space
414                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
415         } else if (which == 85 && global_select) {   // u
416                 select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
417         } else {
418                 check_for_hash_change();
419         }
420 }
421
422 // enable the horrible horrible IE PNG hack
423 function ie_png_hack()
424 {
425         var vstr = navigator.appVersion.split("MSIE");
426         var v = parseFloat(vstr[1]);
427         if (v >= 5.5 && v < 7.0 && document.body.filters) {
428                 var next = document.getElementById("next");
429                 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); }\" />";
430                 
431                 var previous = document.getElementById("previous");
432                 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); }\" />";
433                 
434                 var close = document.getElementById("close");
435                 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);\" />";
436         }
437 }
438
439 function parse_image_num(default_value) {
440         var num = parseInt(window.location.hash.substr(1));
441         if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
442                 return (num - 1);
443         } else {
444                 return default_value;
445         }
446 }
447
448 function check_for_hash_change() {
449         var num = parse_image_num(-1);
450         if (num != -1 && num != global_image_num) {
451                 global_image_num = num;
452                 relayout();
453         }
454 }