]> git.sesse.net Git - pr0n/blobdiff - files/pr0n-fullscreen.js
Rework preloading.
[pr0n] / files / pr0n-fullscreen.js
index 3cc60558271cebbeb7a0ff89a43cc16a64675575..a8ad78a9d0296ea912ba8ffab9840a9e68f620fc 100644 (file)
@@ -1,52 +1,19 @@
-var req;
+(function() {
 
-function init_ajax()
-{
-       req = false;
-
-       if (window.XMLHttpRequest) {
-               // Mozilla/Safari
-               try {
-                       req = new XMLHttpRequest();
-               } catch(e) {
-                       req = false;
-               }
-       } else if (window.ActiveXObject) {
-               // IE/Windows
-               try {
-                       req = new ActiveXObject("Msxml2.XMLHTTP");
-               } catch(e) {
-                       try {
-                               req = new ActiveXObject("Microsoft.XMLHTTP");
-                       } catch(e) {
-                               req = false;
-                       }
-               }
-       }
-}
+var global_disabled_opacity = 0.1;
+var global_default_opacity = 0.7;
+var global_highlight_opacity = 1.0;
+var global_infobox = true;
 
 function find_width()
 {
-       if (typeof(window.innerWidth) == 'number') {
-               // non-IE
-               return [window.innerWidth, window.innerHeight];
-       } else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
-               // IE 6+ in 'standards compliant mode'
-               return [document.documentElement.clientWidth, document.documentElement.clientHeight];
-       } else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {
-               // IE 4-compatible
-               return [document.body.clientWidth, document.body.clientHeight];
-       }
-       return [null,null];
+       var dpr = find_dpr();
+       return [window.innerWidth * dpr, window.innerHeight * dpr];
 }
 
-function parse_image_num(default_value) {
-       var num = parseInt(window.location.hash.substr(1));
-       if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
-               return (num - 1);
-       } else {
-               return default_value;
-       }
+function find_dpr()
+{
+       return window.devicePixelRatio || 1;
 }
 
 /*
@@ -59,6 +26,10 @@ function parse_image_num(default_value) {
  * pick_image_size, below.
  */
 var fixed_sizes = [
+       [ 3840, 2880 ],
+       [ 3200, 2400 ],
+       [ 2800, 2100 ],
+       [ 2304, 1728 ],
        [ 2048, 1536 ],
        [ 1920, 1440 ],
        [ 1600, 1200 ],
@@ -118,45 +89,55 @@ function pick_image_size(screen_size, image_size)
        return [ 80, 64 ];
 }
 
-function replace_image_element(url, element_id, parent_node)
+function rename_element(old_name, new_name)
 {
-       var img = document.getElementById(element_id);
-       if (img !== null) {
-               img.src = "data:";
-               img.parentNode.removeChild(img);
+       // Remove any element that's in the way.
+       var elem = document.getElementById(new_name);
+       if (elem !== null) {
+               elem.parentNode.removeChild(elem);
        }
 
-       img = document.createElement("img");
-       img.id = element_id;
-       img.alt = "";
-
-       if (img.src != url) {
-               img.src = url;
+       elem = document.getElementById(old_name);
+       if (elem !== null) {
+               elem.id = new_name;
        }
-       
-       parent_node.appendChild(img);
-       return img;
+       return elem;
 }
 
-function display_image(width, height, evt, filename, element_id)
+function display_image(url, backend_width, backend_height, elem_id, offset, preload)
 {
-       var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/nobox/" + filename;
-       var main = document.getElementById("iehack");
-       var img = replace_image_element(url, element_id, main);
+       // See if this image already exists in the DOM; if not, add it.
+       var img = document.getElementById(elem_id);
+       if (img === null) {
+               img = document.createElement("img");
+               img.id = elem_id;
+               img.alt = "";
+               img.className = preload ? "fsbox" : "fsimg";
+       }
+       img.style.position = "absolute";
+       img.style.transformOrigin = "top left";
+       document.getElementById("main").appendChild(img);
 
-       if (global_infobox != 'nobox') {
-               var url = "http://" + global_vhost + "/" + evt + "/" + width + "x" + height + "/box/" + filename;
-               var boximg = replace_image_element(url, element_id + "_box", main);
+       if (offset === 0) {
+               img.src = url;
+               position_image(img, backend_width, backend_height, offset, preload);
+       } else {
+               // This is a preload, so wait for the main image to be ready.
+               // The test for .complete is an old IE hack, which I don't know if is relevant anymore.
+               var main_img = document.getElementById(global_image_num);
+               if (main_img === null || main_img.complete) {
+                       img.src = url;
+               } else {
+                       main_img.addEventListener('load', function() { img.src = url; }, false);
+               }
 
-               boximg.style.position = "absolute";
-               boximg.style.left = "0px";
-               boximg.style.bottom = "-1px";
+               // Seemingly one needs to delay position_image(), or Firefox will set the initial
+               // scroll offset completely off.
+               setTimeout(function() { position_image(img, backend_width, backend_height, offset, preload); }, 1);
        }
-
-       return img;
 }
 
-function display_image_num(num, element_id)
+function display_image_num(num, offset)
 {
        var screen_size = find_width();
        var adjusted_size;
@@ -168,43 +149,47 @@ function display_image_num(num, element_id)
                adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
        }
 
-       var img = display_image(adjusted_size[0], adjusted_size[1], global_image_list[num][0], global_image_list[num][1], element_id);
-       
-       if (element_id == "image") {
-               // we want to shrink the box as much as possible if we know the true
-               // size of the image
-               center_image(num);
-               
-               // replace the anchor part (if any) with the image number
-               var baseurl = (window.location.toString().split("#"))[0];
-               window.location = baseurl + "#" + (num+1);
+       var evt = global_image_list[num][0];
+       var filename = global_image_list[num][1];
+       var backend_width = adjusted_size[0];
+       var backend_height = adjusted_size[1];
+       var url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "/" + filename;
+       var elem_id = num;
+
+       display_image(url, adjusted_size[2], adjusted_size[3], elem_id, offset, false);
+
+       if (global_infobox) {
+               var url;
+               var dpr = find_dpr();
+               var elem_id = num + "_box";
+               if (dpr == 1) {
+                       url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "/box/" + filename;
+               } else {
+                       url = window.location.origin + "/" + evt + "/" + backend_width + "x" + backend_height + "@" + dpr.toFixed(2) + "/box/" + filename;
+               }
+               display_image(url, adjusted_size[2], adjusted_size[3], elem_id, offset, true);
        }
 
-       return img;
-}
+       if (offset === 0) {
+               // Update the "download original" link.
+               var original_url = window.location.origin + "/" + evt + "/original/" + filename;
+               document.getElementById("origdownload").href = original_url;
+
+               // If it's a raw image, show a JPEG link.
+               var fulldownload = document.getElementById("fulldownload");
+               if (filename.match(/\.(nef|cr2)$/i)) {
+                       fulldownload.style.display = "block";
+                       var full_url = window.location.origin + "/" + evt + "/" + filename;
+                       document.getElementById("fulldownloadlink").href = full_url;
+                       origdownload.innerHTML = "Download original image (RAW)";
+               } else {
+                       fulldownload.style.display = "none";
+                       origdownload.innerHTML = "Download original image";
+               }
 
-function prepare_preload(img, num)
-{
-       // cancel any pending preload
-       var preload = document.getElementById("preload");
-       if (preload !== null) {
-               preload.src = "data:";
-               preload.parentNode.removeChild(preload);
-       }
-       
-       var preload_box = document.getElementById("preload_box");
-       if (preload_box !== null) {
-               preload_box.src = "data:";
-               preload_box.parentNode.removeChild(preload_box);
+               // replace the anchor part (if any) with the image number
+               window.location.hash = "#" + (num+1);
        }
-
-       // grmf -- IE doesn't fire onload if the image was loaded from cache, so check for
-       // completeness first; should at least be _somewhat_ better
-       if (img.complete) {
-               display_image_num(num, "preload");
-       } else {
-               img.onload = function() { display_image_num(num, "preload"); };
-       }       
 }
 
 function can_go_next()
@@ -220,74 +205,109 @@ function can_go_previous()
 function set_opacity(id, amount)
 {
        var elem = document.getElementById(id);
-       if (typeof(elem.style.opacity) != 'undefined') {            // W3C
-               elem.style.opacity = amount;
-       } else if (typeof(elem.style.mozOpacity) != 'undefined') {  // older Mozilla
-               elem.style.mozOpacity = amount;
-       } else if (typeof(elem.style.filter) != 'undefined') {      // IE
-               if (elem.style.filter.indexOf("alpha") == -1) {
-                       // add an alpha filter if there isn't one already
-                       if (elem.style.filter) {
-                               elem.style.filter += " ";
-                       } else {
-                               elem.style.filter = "";
-                       }
-                       elem.style.filter += "alpha(opacity=" + (amount*100.0) + ")";
-               } else {        
-                       // ugh? this seems to break in color index mode...
-                       if (typeof(elem.filters) == 'unknown') {
-                               elem.style.filter = "alpha(opacity=" + (amount*100.0) + ")";
-                       } else {
-                               elem.filters.alpha.opacity = (amount * 100.0);
-                       }
-               }
-       } else {                             // no alpha support
-               if (amount > 0.5) {
-                       elem.style.visibility = "visible";
-                       elem.style.zorder = 1;
-               } else {
-                       elem.style.visibility = "hidden";
+
+       // If optionmenu is visible, options is also visible.
+       if (id === "options" && amount < 0.7) {
+               var optionmenu = document.getElementById("optionmenu");
+               if (optionmenu.style.display === "block") {
+                       amount = 0.7;
                }
        }
+       elem.style.opacity = amount;
 }
 
-function center_image(num)
+function position_image(img, backend_width, backend_height, offset, preload)
 {
        var screen_size = find_width();
+       var dpr = find_dpr();
        var width, height;
-       
-       if (global_image_list[num][2] == -1) {
+
+       if (backend_width == -1) {
                // no size information, use our pessimal guess
                var adjusted_size = max_image_size(screen_size);
                width = adjusted_size[0];
                height = adjusted_size[1];
        } else {
                // use the exact information
-               var adjusted_size = pick_image_size(screen_size, [ global_image_list[num][2], global_image_list[num][3] ]);
+               var adjusted_size = pick_image_size(screen_size, [ backend_width, backend_height ]);
                width = adjusted_size[2];
                height = adjusted_size[3];
        }
 
+       var extra_x_offset = find_width()[0] * offset;
+       var left = (screen_size[0] - width) / 2;
+       var top = (screen_size[1] - height) / 2;
+
+       if (global_infobox) top -= dpr * (24/2);
+
        // center the image on-screen
-       var main = document.getElementById("main");
-       main.style.position = "absolute";
-       main.style.left = (screen_size[0] - width) / 2 + "px";
-       main.style.top = (screen_size[1] - height) / 2 + "px"; 
-       main.style.width = width + "px";
-       main.style.height = height + "px";
-       main.style.lineHeight = height + "px";
+       img.style.position = "absolute";
+       img.style.left = (left / dpr) + "px";
+       img.style.transform = "translate(" + extra_x_offset + "px,0px)";
+
+       if (preload) {
+               img.style.top = (top + height) / dpr + "px";
+       } else {
+               img.style.top = (top / dpr) + "px";
+               img.style.lineHeight = (height / dpr) + "px";
+               img.style.width = (width / dpr) + "px";
+               img.style.height = (height / dpr) + "px";
+       }
 }
 
-function relayout()
+function update_shown_images()
 {
-       var img = display_image_num(global_image_num, "image");
+       // Go through and remove all the elements that are not supposed to be there.
+       var main = document.getElementById("main");
+       var children = main.children;
+       var to_remove = [];
+       for (var i = 0; i < children.length; i++) {
+               var child = children[i];
+               var inum = null;
+               if (child.className === "fsimg") {
+                       inum = parseInt(child.id);
+               } else if (child.className === "fsbox") {
+                       inum = parseInt(child.id.replace("_box", ""));
+               } else {
+                       continue;
+               }
+
+               // FIXME: For whatever reason, if we don't actually remove an item
+               // and then scroll it out of view, Chrome scrolls to it.
+               // So don't keep anything that's going to be a preload;
+               // we'll have to recreate the element entirely.
+               //if (inum !== global_image_num - 1 &&
+               //    inum !== global_image_num &&
+               //    inum !== global_image_num + 1) {
+               //      to_remove.push(child);
+               //}
+               if (inum !== global_image_num) {
+                       to_remove.push(child);
+               }
+       }
+       for (let child of to_remove) {
+               child.parentNode.removeChild(child);
+       }
+
+       // Add any missing elements. Note that we add the main one first,
+       // so that the preloads have an element to fire onload off of.
+       display_image_num(global_image_num, 0);
+       if (can_go_previous()) {
+               display_image_num(global_image_num - 1, -1);
+       }
        if (can_go_next()) {
-               prepare_preload(img, global_image_num + 1);
+               display_image_num(global_image_num + 1, 1);
        }
+}
 
-       set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
-       set_opacity("next", can_go_next() ? 0.7 : 0.1);
-       set_opacity("close", 0.7);
+function relayout()
+{
+       update_shown_images();
+
+       set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
+       set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
+       set_opacity("close", global_default_opacity);
+       set_opacity("options", global_default_opacity);
 }
 
 function go_previous()
@@ -296,14 +316,14 @@ function go_previous()
                return;
        }
 
-       var img = display_image_num(--global_image_num, "image");
+       --global_image_num;
+       update_shown_images();
        if (can_go_previous()) {
-               set_opacity("previous", 0.7);
-               prepare_preload(img, global_image_num - 1);
+               set_opacity("previous", global_default_opacity);
        } else {
-               set_opacity("previous", 0.1);
+               set_opacity("previous", global_disabled_opacity);
        }
-       set_opacity("next", can_go_next() ? 0.7 : 0.1);
+       set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);
 }
 
 function go_next()
@@ -312,20 +332,36 @@ function go_next()
                return;
        }
 
-       var img = display_image_num(++global_image_num, "image");
+       ++global_image_num;
+       update_shown_images();
        if (can_go_next()) {
-               set_opacity("next", 0.7);
-               prepare_preload(img, global_image_num + 1);
+               set_opacity("next", global_default_opacity);
        } else {
-               set_opacity("next", 0.1);
+               set_opacity("next", global_disabled_opacity);
        }
-       set_opacity("previous", can_go_previous() ? 0.7 : 0.1);
+       set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
 }
 
 function do_close()
 {
-       window.location = global_return_url;
+       if (global_image_num > 0) {
+               window.location = global_return_url + '#' + (global_image_num + 1);
+       } else {
+               window.location = global_return_url;
+       }
+}
+
+function toggle_optionmenu()
+{
+       var optionmenu = document.getElementById("optionmenu");
+       if (optionmenu.style.display === "block") {
+               optionmenu.style.display = "none";
+       } else {
+               optionmenu.style.display = "block";
+               set_opacity("options", 0.7);
+       }
 }
+window['toggle_optionmenu'] = toggle_optionmenu;
 
 function draw_text(msg)
 {
@@ -358,7 +394,7 @@ function fade_text(opacity)
                if (opacity < 0.0) {
                        opacity = 0.0;
                }
-               setTimeout("fade_text(" + opacity + ")", 30);
+               setTimeout(function() { fade_text(opacity); }, 30);
        } else {
                var text = document.getElementById("text");
                if (text !== null) {
@@ -367,33 +403,34 @@ function fade_text(opacity)
        }
 }
 
-function select_image(evt, filename)
+function select_image(evt, filename, selected)
 {
-       if (!req) {
-               return;
+       if (selected) {
+               draw_text("Selecting " + filename + "...");
+       } else {
+               draw_text("Unselecting " + filename + "...");
        }
-
-       draw_text("Selecting " + filename + "...");
        
-       req.open("POST", "http://" + global_vhost + "/select", false);
+       var req = new XMLHttpRequest();
+       req.open("POST", window.location.origin + "/select", false);
        req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
-       req.send("mode=single&event=" + evt + "&filename=" + filename);
+       req.send("event=" + evt + "&filename=" + filename + "&selected=" + selected);
 
-       setTimeout("fade_text(0.99)", 30);
+       setTimeout(function() { fade_text(0.99); }, 30);
 }
 
 function key_down(which)
 {
        if (which == 39) {   // right
                if (can_go_next()) {
-                       set_opacity("next", 0.99);
+                       set_opacity("next", global_highlight_opacity);
                }
        } else if (which == 37) {   // left
                if (can_go_previous()) {
-                       set_opacity("previous", 0.99);
+                       set_opacity("previous", global_highlight_opacity);
                }
        } else if (which == 27) {   // escape
-               set_opacity("close", 0.99);
+               set_opacity("close", global_higlight_opacity);
        } else {
                check_for_hash_change();
        }
@@ -402,47 +439,92 @@ function key_down(which)
 function key_up(which) {
        if (which == 39) {   // right
                if (can_go_next()) {
-                       set_opacity("next", 0.7);
+                       set_opacity("next", global_default_opacity);
                        go_next();
                }
        } else if (which == 37) {   // left
                if (can_go_previous()) {
-                       set_opacity("previous", 0.7);
+                       set_opacity("previous", global_default_opacity);
                        go_previous();
                }
        } else if (which == 27) {   // escape
-               set_opacity("close", 0.7);
+               set_opacity("close", global_default_opacity);
                do_close();
        } else if (which == 32 && global_select) {   // space
-               select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1]);
+               select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 1);
+       } else if (which == 85 && global_select) {   // u
+               select_image(global_image_list[global_image_num][0], global_image_list[global_image_num][1], 0);
        } else {
                check_for_hash_change();
        }
 }
 
-// enable the horrible horrible IE PNG hack
-function ie_png_hack()
-{
-       var vstr = navigator.appVersion.split("MSIE");
-       var v = parseFloat(vstr[1]);
-       if (v >= 5.5 && v < 7.0 && document.body.filters) {
-               var next = document.getElementById("next");
-               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); }\" />";
-               
-               var previous = document.getElementById("previous");
-               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); }\" />";
-               
-               var close = document.getElementById("close");
-               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);\" />";
+function parse_image_num(default_value) {
+       var num = parseInt(window.location.hash.substr(1));
+       if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
+               return (num - 1);
+       } else {
+               return default_value;
        }
 }
+window['parse_image_num'] = parse_image_num;
 
 function check_for_hash_change() {
-       var num = parseInt(window.location.hash.substr(1));
-       if (num >= 1 && num <= global_image_list.length) {  // and then num != NaN
-               if (--num != global_image_num) {
-                       global_image_num = num;
-                       relayout();
-               }
+       var num = parse_image_num(-1);
+       if (num != -1 && num != global_image_num) {
+               global_image_num = num;
+               relayout();
+       }
+}
+
+function toggle_immersive() {
+       if (global_default_opacity == 0.7) {
+               global_disabled_opacity = 0.0;
+               global_default_opacity = 0.0;
+               global_highlight_opacity = 0.2;
+               global_infobox = false;
+               document.getElementById('immersivetoggle').innerHTML = 'Show decorations';
+       } else {
+               global_disabled_opacity = 0.1;
+               global_default_opacity = 0.7;
+               global_highlight_opacity = 1.0;
+               global_infobox = true;
+               document.getElementById('immersivetoggle').innerHTML = 'Hide all decorations';
        }
+       relayout();
 }
+window['toggle_immersive'] = toggle_immersive;
+
+window.onload = function() {
+       relayout();
+       setInterval(check_for_hash_change, 1000);
+
+       var body = document.body;
+       body.onresize = function() { relayout(); };
+       body.onkeydown = function(evt) { key_down(evt.keyCode); };
+       body.onkeyup = function(evt) { key_up(evt.keyCode); };
+       body.onhashchange = function() { check_for_hash_change(); };
+       body.onclick = function() { check_for_hash_change(); };
+
+       var previous = document.getElementById('previous');
+       previous.onmousedown = function() { if (can_go_previous()) { set_opacity('previous', global_highlight_opacity); } };
+       previous.onmouseup = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); go_previous(); } };
+       previous.onmouseout = function() { if (can_go_previous()) { set_opacity('previous', global_default_opacity); } };
+
+       var next = document.getElementById('next');
+       next.onmousedown = function() { if (can_go_next()) { set_opacity('next', global_highlight_opacity); } };
+       next.onmouseup = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); go_next(); } };
+       next.onmouseout = function() { if (can_go_next()) { set_opacity('next', global_default_opacity); } };
+
+       var close = document.getElementById('close');
+       close.onmousedown = function() { set_opacity('close', global_highlight_opacity); };
+       close.onmouseup = function() { set_opacity('close', global_default_opacity); do_close(); };
+       close.onmouseout = function() { set_opacity('close', global_default_opacity); };
+
+       var options = document.getElementById('options');
+       options.onmousedown = function() { set_opacity('options', global_highlight_opacity); };
+       options.onmouseup = function() { set_opacity('options', global_default_opacity); toggle_optionmenu(); };
+       options.onmouseout = function() { set_opacity('options', global_default_opacity); };
+};
+
+})();