basic scrolling renderer

lib/epubjs/core.js

@@ -153,4 +153,108 @@ EPUBJS.core.folder = function(url){
   
   return folder;
 
+};
+
+
+EPUBJS.core.queue = function(_scope){
+  var _q = [];
+  var scope = _scope;
+  // Add an item to the queue
+  var enqueue = function(funcName, args, context) {
+    _q.push({
+      "funcName" : funcName,
+      "args"     : args,
+      "context"  : context
+    });
+    return _q;
+  };
+  // Run one item
+  var dequeue = function(){
+    var inwait;
+    if(_q.length) {
+      inwait = _q.shift();
+      // Defer to any current tasks
+      // setTimeout(function(){
+      scope[inwait.funcName].apply(inwait.context || scope, inwait.args);
+      // }, 0);
+    }
+  };
+  
+  // Run All
+  var flush = function(){
+    while(_q.length) {
+      dequeue();
+    }
+  };
+  // Clear all items in wait
+  var clear = function(){
+    _q = [];
+  };
+  
+  var length = function(){
+    return _q.length;
+  };
+  
+  return {
+    "enqueue" : enqueue,
+    "dequeue" : dequeue,
+    "flush" : flush,
+    "clear" : clear,
+    "length" : length
+  };
+};
+
+EPUBJS.core.isElement = function(obj) {
+    return !!(obj && obj.nodeType == 1);
+};
+
+// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
+EPUBJS.core.uuid = function() {
+  var d = new Date().getTime();
+  var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
+      var r = (d + Math.random()*16)%16 | 0;
+      d = Math.floor(d/16);
+      return (c=='x' ? r : (r&0x7|0x8)).toString(16);
+  });
+  return uuid;
+};
+
+// From Lodash
+EPUBJS.core.values = function(object) {
+  var index = -1,
+      props = Object.keys(object),
+      length = props.length,
+      result = Array(length);
+
+  while (++index < length) {
+    result[index] = object[props[index]];
+  }
+  return result;
+};
+
+EPUBJS.core.resolveUrl = function(base, path) {
+  var url,
+    segments = [],
+    // uri = EPUBJS.core.uri(path),
+    folders = base.split("/"),
+    paths;
+  
+  // if(uri.host) {
+  //   return path;
+  // }
+  
+  folders.pop();
+
+  paths = path.split("/");
+  paths.forEach(function(p){
+    if(p === ".."){
+      folders.pop();
+    }else{
+      segments.push(p);
+    }
+  });
+
+  url = folders.concat(segments);
+
+  return url.join("/");
 };