angular-file-upload.js

/*
 angular-file-upload v1.1.1
 https://github.com/davidecavaliere/angular-file-upload
*/
(function(angular, factory) {
    if (typeof define === 'function' && define.amd) {
        define('angular-file-upload', ['angular'], function(angular) {
            return factory(angular);
        });
    } else {
        return factory(angular);
    }
}(typeof angular === 'undefined' ? null : angular, function(angular) {

var module = angular.module('angularFileUpload', []);

'use strict';

/**
 * Classes
 *
 * FileUploader
 * FileUploader.FileLikeObject
 * FileUploader.FileItem
 * FileUploader.FileDirective
 * FileUploader.FileSelect
 * FileUploader.FileDrop
 * FileUploader.FileOver
 */

module


    .value('fileUploaderOptions', {
        url: '/',
        alias: 'file',
        headers: {},
        queue: [],
        progress: 0,
        autoUpload: false,
        removeAfterUpload: false,
        method: 'POST',
        filters: [],
        formData: [],
        queueLimit: Number.MAX_VALUE,
        withCredentials: false,
        binaryJsClient : null,
        socketJsClient : null
    })


    .factory('FileUploader', ['fileUploaderOptions', '$rootScope', '$http', '$window', '$compile',
        function(fileUploaderOptions, $rootScope, $http, $window, $compile) {
            /**
             * Creates an instance of FileUploader
             * @param {Object} [options]
             * @constructor
             */
            function FileUploader(options) {
                var settings = angular.copy(fileUploaderOptions);
                angular.extend(this, settings, options, {
                    isUploading: false,
                    _nextIndex: 0,
                    _failFilterIndex: -1,
                    _directives: {select: [], drop: [], over: []}
                });

                // add default filters
                this.filters.unshift({name: 'queueLimit', fn: this._queueLimitFilter});
                this.filters.unshift({name: 'folder', fn: this._folderFilter});
            }
            /**********************
             * PUBLIC
             **********************/
            /**
             * Checks a support the html5 uploader
             * @returns {Boolean}
             * @readonly
             */
            FileUploader.prototype.isHTML5 = !!($window.File && $window.FormData);
            /**
             * Adds items to the queue
             * @param {File|HTMLInputElement|Object|FileList|Array<Object>} files
             * @param {Object} [options]
             * @param {Array<Function>|String} filters
             */
            FileUploader.prototype.addToQueue = function(files, options, filters) {
                var list = this.isArrayLikeObject(files) ? files: [files];
                var arrayOfFilters = this._getFilters(filters);
                var count = this.queue.length;
                var addedFileItems = [];

                angular.forEach(list, function(some /*{File|HTMLInputElement|Object}*/) {
                    var temp = new FileUploader.FileLikeObject(some);

                    if (this._isValidFile(temp, arrayOfFilters, options)) {
                        var fileItem = new FileUploader.FileItem(this, some, options);
                        addedFileItems.push(fileItem);
                        this.queue.push(fileItem);
                        this._onAfterAddingFile(fileItem);
                    } else {
                        var filter = this.filters[this._failFilterIndex];
                        this._onWhenAddingFileFailed(temp, filter, options);
                    }
                }, this);

                if(this.queue.length !== count) {
                    this._onAfterAddingAll(addedFileItems);
                    this.progress = this._getTotalProgress();
                }

                this._render();
                if (this.autoUpload) this.uploadAll();
            };
            /**
             * Remove items from the queue. Remove last: index = -1
             * @param {FileItem|Number} value
             */
            FileUploader.prototype.removeFromQueue = function(value) {
                var index = this.getIndexOfItem(value);
                var item = this.queue[index];
                if (item.isUploading) item.cancel();
                this.queue.splice(index, 1);
                item._destroy();
                this.progress = this._getTotalProgress();
            };
            /**
             * Clears the queue
             */
            FileUploader.prototype.clearQueue = function() {
                while(this.queue.length) {
                    this.queue[0].remove();
                }
                this.progress = 0;
            };
            /**
             * Uploads a item from the queue
             * @param {FileItem|Number} value
             */
            FileUploader.prototype.uploadItem = function(value) {
                var index = this.getIndexOfItem(value);
                var item = this.queue[index];

                var transport = null;

                if (this.binaryJsClient) {
                  transport = '_binaryJsTransport';
                } else if (this.socketJsClient) {
                  transport = '_socketJsTransport';
                } else if (this.isHTML5) {
                  transport = '_xhrTransport';
                } else {
                  transport = '_iframeTransport';
                }

                item._prepareToUploading();
                if(this.isUploading) return;

                this.isUploading = true;

                this[transport](item);


            };
            /**
             * Cancels uploading of item from the queue
             * @param {FileItem|Number} value
             */
            FileUploader.prototype.cancelItem = function(value) {
                var index = this.getIndexOfItem(value);
                var item = this.queue[index];
                var prop = this.isHTML5 ? '_xhr' : '_form';
                if (item && item.isUploading) item[prop].abort();
            };
            /**
             * Uploads all not uploaded items of queue
             */
            FileUploader.prototype.uploadAll = function() {
                var items = this.getNotUploadedItems().filter(function(item) {
                    return !item.isUploading;
                });
                if (!items.length) return;

                angular.forEach(items, function(item) {
                    item._prepareToUploading();
                });
                items[0].upload();
            };
            /**
             * Cancels all uploads
             */
            FileUploader.prototype.cancelAll = function() {
                var items = this.getNotUploadedItems();
                angular.forEach(items, function(item) {
                    item.cancel();
                });
            };
            /**
             * Returns "true" if value an instance of File
             * @param {*} value
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype.isFile = function(value) {
                var fn = $window.File;
                return (fn && value instanceof fn);
            };
            /**
             * Returns "true" if value an instance of FileLikeObject
             * @param {*} value
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype.isFileLikeObject = function(value) {
                return value instanceof FileUploader.FileLikeObject;
            };
            /**
             * Returns "true" if value is array like object
             * @param {*} value
             * @returns {Boolean}
             */
            FileUploader.prototype.isArrayLikeObject = function(value) {
                return (angular.isObject(value) && 'length' in value);
            };
            /**
             * Returns a index of item from the queue
             * @param {Item|Number} value
             * @returns {Number}
             */
            FileUploader.prototype.getIndexOfItem = function(value) {
                return angular.isNumber(value) ? value : this.queue.indexOf(value);
            };
            /**
             * Returns not uploaded items
             * @returns {Array}
             */
            FileUploader.prototype.getNotUploadedItems = function() {
                return this.queue.filter(function(item) {
                    return !item.isUploaded;
                });
            };
            /**
             * Returns items ready for upload
             * @returns {Array}
             */
            FileUploader.prototype.getReadyItems = function() {
                return this.queue
                    .filter(function(item) {
                        return (item.isReady && !item.isUploading);
                    })
                    .sort(function(item1, item2) {
                        return item1.index - item2.index;
                    });
            };
            /**
             * Destroys instance of FileUploader
             */
            FileUploader.prototype.destroy = function() {
                angular.forEach(this._directives, function(key) {
                    angular.forEach(this._directives[key], function(object) {
                        object.destroy();
                    }, this);
                }, this);
            };
            /**
             * Callback
             * @param {Array} fileItems
             */
            FileUploader.prototype.onAfterAddingAll = function(fileItems) {};
            /**
             * Callback
             * @param {FileItem} fileItem
             */
            FileUploader.prototype.onAfterAddingFile = function(fileItem) {};
            /**
             * Callback
             * @param {File|Object} item
             * @param {Object} filter
             * @param {Object} options
             * @private
             */
            FileUploader.prototype.onWhenAddingFileFailed = function(item, filter, options) {};
            /**
             * Callback
             * @param {FileItem} fileItem
             */
            FileUploader.prototype.onBeforeUploadItem = function(fileItem) {};
            /**
             * Callback
             * @param {FileItem} fileItem
             * @param {Number} progress
             */
            FileUploader.prototype.onProgressItem = function(fileItem, progress) {};
            /**
             * Callback
             * @param {Number} progress
             */
            FileUploader.prototype.onProgressAll = function(progress) {};
            /**
             * Callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileUploader.prototype.onSuccessItem = function(item, response, status, headers) {};
            /**
             * Callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileUploader.prototype.onErrorItem = function(item, response, status, headers) {};
            /**
             * Callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileUploader.prototype.onCancelItem = function(item, response, status, headers) {};
            /**
             * Callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileUploader.prototype.onCompleteItem = function(item, response, status, headers) {};
            /**
             * Callback
             */
            FileUploader.prototype.onCompleteAll = function() {};
            /**********************
             * PRIVATE
             **********************/
            /**
             * Returns the total progress
             * @param {Number} [value]
             * @returns {Number}
             * @private
             */
            FileUploader.prototype._getTotalProgress = function(value) {
                if(this.removeAfterUpload) return value || 0;

                var notUploaded = this.getNotUploadedItems().length;
                var uploaded = notUploaded ? this.queue.length - notUploaded : this.queue.length;
                var ratio = 100 / this.queue.length;
                var current = (value || 0) * ratio / 100;

                return Math.round(uploaded * ratio + current);
            };
            /**
             * Returns array of filters
             * @param {Array<Function>|String} filters
             * @returns {Array<Function>}
             * @private
             */
            FileUploader.prototype._getFilters = function(filters) {
                if (angular.isUndefined(filters)) return this.filters;
                if (angular.isArray(filters)) return filters;
                var names = filters.split(/\s*,/);
                return this.filters.filter(function(filter) {
                    return names.indexOf(filter.name) !== -1;
                }, this);
            };
            /**
             * Updates html
             * @private
             */
            FileUploader.prototype._render = function() {
                if (!$rootScope.$$phase) $rootScope.$apply();
            };
            /**
             * Returns "true" if item is a file (not folder)
             * @param {File|FileLikeObject} item
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype._folderFilter = function(item) {
                return !!(item.size || item.type);
            };
            /**
             * Returns "true" if the limit has not been reached
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype._queueLimitFilter = function() {
                return this.queue.length < this.queueLimit;
            };
            /**
             * Returns "true" if file pass all filters
             * @param {File|Object} file
             * @param {Array<Function>} filters
             * @param {Object} options
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype._isValidFile = function(file, filters, options) {
                this._failFilterIndex = -1;
                return !filters.length ? true : filters.every(function(filter) {
                    this._failFilterIndex++;
                    return filter.fn.call(this, file, options);
                }, this);
            };
            /**
             * Checks whether upload successful
             * @param {Number} status
             * @returns {Boolean}
             * @private
             */
            FileUploader.prototype._isSuccessCode = function(status) {
                return (status >= 200 && status < 300) || status === 304;
            };
            /**
             * Transforms the server response
             * @param {*} response
             * @returns {*}
             * @private
             */
            FileUploader.prototype._transformResponse = function(response, headers) {
                            angular.forEach($http.defaults.transformResponse, function(transformFn) {
                                response = transformFn(response, function(_name) {
            				        if (_name) {
            				            var lowercase = function(string) {return (typeof string === 'string') ? string.toLowerCase() : string;};
            
            				            var value = headers[_name.toLowerCase()];
            				            if (value === void 0) {
            					            value = null;
            				            }
            				        }
            				        return value; 
            			});
                });
                return response;
            };
            /**
             * Parsed response headers
             * @param headers
             * @returns {Object}
             * @see https://github.com/angular/angular.js/blob/master/src/ng/http.js
             * @private
             */
            FileUploader.prototype._parseHeaders = function(headers) {
                var parsed = {}, key, val, i;

                if (!headers) return parsed;

                function trim(string) {
                    return string.replace(/^\s+/, '').replace(/\s+$/, '');
                }
                function lowercase(string) {
                    return string.toLowerCase();
                }

                angular.forEach(headers.split('\n'), function(line) {
                    i = line.indexOf(':');
                    key = lowercase(trim(line.substr(0, i)));
                    val = trim(line.substr(i + 1));

                    if (key) {
                        parsed[key] = parsed[key] ? parsed[key] + ', ' + val : val;
                    }
                });

                return parsed;
            };

            /**
             * The Socket Js transport
             */
            FileUploader.prototype._socketJsTransport = function(item) {
              var file = item._file;
              var client = this.socketJsClient;
              var that = this;

              that._onBeforeUploadItem(item);

              var stream = client.send(file, { hash : this.getIndexOfItem(item) });

              var size = 0;
              var progress = 0;

              client.socket.on('progress', function(data) {
                  var _item = that.queue[data.itemKey];
                  that._onProgressItem(_item, data.tx);

              });

              client.socket.on('upload-done', function(data) {
                var _item = that.queue[data.itemKey];
                that._onSuccessItem(_item);
                that._onCompleteItem(_item);
              });

              this._render();
            };

            /**
             * The Binary Js transport
             */
            FileUploader.prototype._binaryJsTransport = function(item) {
              var file = item._file;
              var client = this.binaryJsClient;
              var that = this;

              that._onBeforeUploadItem(item);


              var stream = client.send(file, {
                name : file.name,
                size : file.size
              });
              var tx = 0;
              stream.on('data', function(data) {
                var progress = Math.round(tx+=data.rx*100);
                that._onProgressItem(item, progress);

                if (progress == 100) {
                  that._onSuccessItem(item);
                  that._onCompleteItem(item);
                }
              });

              stream.on('end', function(e) {
                //that._onCompleteItem(item);
              });

              this._render();

            }
            /**
             * The XMLHttpRequest transport
             * @param {FileItem} item
             * @private
             */
            FileUploader.prototype._xhrTransport = function(item) {
                var xhr = item._xhr = new XMLHttpRequest();
                var form = new FormData();
                var that = this;

                that._onBeforeUploadItem(item);

                angular.forEach(item.formData, function(obj) {
                    angular.forEach(obj, function(value, key) {
                        form.append(key, value);
                    });
                });

                form.append(item.alias, item._file, item.file.name);

                xhr.upload.onprogress = function(event) {
                    var progress = Math.round(event.lengthComputable ? event.loaded * 100 / event.total : 0);
                    that._onProgressItem(item, progress);
                };

                xhr.onload = function() {
                    var headers = that._parseHeaders(xhr.getAllResponseHeaders());
                    var response = that._transformResponse(xhr.response, headers);
                    var gist = that._isSuccessCode(xhr.status) ? 'Success' : 'Error';
                    var method = '_on' + gist + 'Item';
                    that[method](item, response, xhr.status, headers);
                    that._onCompleteItem(item, response, xhr.status, headers);
                };

                xhr.onerror = function() {
                    var headers = that._parseHeaders(xhr.getAllResponseHeaders());
                    var response = that._transformResponse(xhr.response, headers);
                    that._onErrorItem(item, response, xhr.status, headers);
                    that._onCompleteItem(item, response, xhr.status, headers);
                };

                xhr.onabort = function() {
                    var headers = that._parseHeaders(xhr.getAllResponseHeaders());
                    var response = that._transformResponse(xhr.response, headers);
                    that._onCancelItem(item, response, xhr.status, headers);
                    that._onCompleteItem(item, response, xhr.status, headers);
                };

                xhr.open(item.method, item.url, true);

                xhr.withCredentials = item.withCredentials;

                angular.forEach(item.headers, function(value, name) {
                    xhr.setRequestHeader(name, value);
                });

                xhr.send(form);
                this._render();
            };
            /**
             * The IFrame transport
             * @param {FileItem} item
             * @private
             */
            FileUploader.prototype._iframeTransport = function(item) {
                var form = angular.element('<form style="display: none;" />');
                var iframe = angular.element('<iframe name="iframeTransport' + Date.now() + '">');
                var input = item._input;
                var that = this;

                if (item._form) item._form.replaceWith(input); // remove old form
                item._form = form; // save link to new form

                that._onBeforeUploadItem(item);

                input.prop('name', item.alias);

                angular.forEach(item.formData, function(obj) {
                    angular.forEach(obj, function(value, key) {
                        form.append(angular.element('<input type="hidden" name="' + key + '" value="' + value + '" />'));
                    });
                });

                form.prop({
                    action: item.url,
                    method: 'POST',
                    target: iframe.prop('name'),
                    enctype: 'multipart/form-data',
                    encoding: 'multipart/form-data' // old IE
                });

                iframe.bind('load', function() {
                    try {
                        // Fix for legacy IE browsers that loads internal error page
                        // when failed WS response received. In consequence iframe
                        // content access denied error is thrown becouse trying to
                        // access cross domain page. When such thing occurs notifying
                        // with empty response object. See more info at:
                        // http://stackoverflow.com/questions/151362/access-is-denied-error-on-accessing-iframe-document-object
                        // Note that if non standard 4xx or 5xx error code returned
                        // from WS then response content can be accessed without error
                        // but 'XHR' status becomes 200. In order to avoid confusion
                        // returning response via same 'success' event handler.

                        // fixed angular.contents() for iframes
                        var html = iframe[0].contentDocument.body.innerHTML;
                    } catch (e) {}

                    var xhr = {response: html, status: 200, dummy: true};
                    var headers = {};					
                    var response = that._transformResponse(xhr.response, headers);

                    that._onSuccessItem(item, response, xhr.status, headers);
                    that._onCompleteItem(item, response, xhr.status, headers);
                });

                form.abort = function() {
                    var xhr = {status: 0, dummy: true};
                    var headers = {};
                    var response;

                    iframe.unbind('load').prop('src', 'javascript:false;');
                    form.replaceWith(input);

                    that._onCancelItem(item, response, xhr.status, headers);
                    that._onCompleteItem(item, response, xhr.status, headers);
                };

                input.after(form);
                form.append(input).append(iframe);

                form[0].submit();
                this._render();
            };
            /**
             * Inner callback
             * @param {File|Object} item
             * @param {Object} filter
             * @param {Object} options
             * @private
             */
            FileUploader.prototype._onWhenAddingFileFailed = function(item, filter, options) {
                this.onWhenAddingFileFailed(item, filter, options);
            };
            /**
             * Inner callback
             * @param {FileItem} item
             */
            FileUploader.prototype._onAfterAddingFile = function(item) {
                this.onAfterAddingFile(item);
            };
            /**
             * Inner callback
             * @param {Array<FileItem>} items
             */
            FileUploader.prototype._onAfterAddingAll = function(items) {
                this.onAfterAddingAll(items);
            };
            /**
             *  Inner callback
             * @param {FileItem} item
             * @private
             */
            FileUploader.prototype._onBeforeUploadItem = function(item) {
                item._onBeforeUpload();
                this.onBeforeUploadItem(item);
            };
            /**
             * Inner callback
             * @param {FileItem} item
             * @param {Number} progress
             * @private
             */
            FileUploader.prototype._onProgressItem = function(item, progress) {
                var total = this._getTotalProgress(progress);
                this.progress = total;
                item._onProgress(progress);
                this.onProgressItem(item, progress);
                this.onProgressAll(total);
                this._render();
            };
            /**
             * Inner callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileUploader.prototype._onSuccessItem = function(item, response, status, headers) {
                item._onSuccess(response, status, headers);
                this.onSuccessItem(item, response, status, headers);
            };
            /**
             * Inner callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileUploader.prototype._onErrorItem = function(item, response, status, headers) {
                item._onError(response, status, headers);
                this.onErrorItem(item, response, status, headers);
            };
            /**
             * Inner callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileUploader.prototype._onCancelItem = function(item, response, status, headers) {
                item._onCancel(response, status, headers);
                this.onCancelItem(item, response, status, headers);
            };
            /**
             * Inner callback
             * @param {FileItem} item
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileUploader.prototype._onCompleteItem = function(item, response, status, headers) {
                item._onComplete(response, status, headers);
                this.onCompleteItem(item, response, status, headers);

                var nextItem = this.getReadyItems()[0];
                this.isUploading = false;

                if(angular.isDefined(nextItem)) {
                    nextItem.upload();
                    return;
                }

                this.onCompleteAll();
                this.progress = this._getTotalProgress();
                this._render();
            };
            /**********************
             * STATIC
             **********************/
            /**
             * @borrows FileUploader.prototype.isFile
             */
            FileUploader.isFile = FileUploader.prototype.isFile;
            /**
             * @borrows FileUploader.prototype.isFileLikeObject
             */
            FileUploader.isFileLikeObject = FileUploader.prototype.isFileLikeObject;
            /**
             * @borrows FileUploader.prototype.isArrayLikeObject
             */
            FileUploader.isArrayLikeObject = FileUploader.prototype.isArrayLikeObject;
            /**
             * @borrows FileUploader.prototype.isHTML5
             */
            FileUploader.isHTML5 = FileUploader.prototype.isHTML5;
            /**
             * Inherits a target (Class_1) by a source (Class_2)
             * @param {Function} target
             * @param {Function} source
             */
            FileUploader.inherit = function(target, source) {
                target.prototype = Object.create(source.prototype);
                target.prototype.constructor = target;
                target.super_ = source;
            };
            FileUploader.FileLikeObject = FileLikeObject;
            FileUploader.FileItem = FileItem;
            FileUploader.FileDirective = FileDirective;
            FileUploader.FileSelect = FileSelect;
            FileUploader.FileDrop = FileDrop;
            FileUploader.FileOver = FileOver;

            // ---------------------------

            /**
             * Creates an instance of FileLikeObject
             * @param {File|HTMLInputElement|Object} fileOrInput
             * @constructor
             */
            function FileLikeObject(fileOrInput) {
                var isInput = angular.isElement(fileOrInput);
                var fakePathOrObject = isInput ? fileOrInput.value : fileOrInput;
                var postfix = angular.isString(fakePathOrObject) ? 'FakePath' : 'Object';
                var method = '_createFrom' + postfix;
                this[method](fakePathOrObject);
            }

            /**
             * Creates file like object from fake path string
             * @param {String} path
             * @private
             */
            FileLikeObject.prototype._createFromFakePath = function(path) {
                this.lastModifiedDate = null;
                this.size = null;
                this.type = 'like/' + path.slice(path.lastIndexOf('.') + 1).toLowerCase();
                this.name = path.slice(path.lastIndexOf('/') + path.lastIndexOf('\\') + 2);
            };
            /**
             * Creates file like object from object
             * @param {File|FileLikeObject} object
             * @private
             */
            FileLikeObject.prototype._createFromObject = function(object) {
                this.lastModifiedDate = angular.copy(object.lastModifiedDate);
                this.size = object.size;
                this.type = object.type;
                this.name = object.name;
            };

            // ---------------------------

            /**
             * Creates an instance of FileItem
             * @param {FileUploader} uploader
             * @param {File|HTMLInputElement|Object} some
             * @param {Object} options
             * @constructor
             */
            function FileItem(uploader, some, options) {
                var isInput = angular.isElement(some);
                var input = isInput ? angular.element(some) : null;
                var file = !isInput ? some : null;

                angular.extend(this, {
                    url: uploader.url,
                    alias: uploader.alias,
                    headers: angular.copy(uploader.headers),
                    formData: angular.copy(uploader.formData),
                    removeAfterUpload: uploader.removeAfterUpload,
                    withCredentials: uploader.withCredentials,
                    method: uploader.method
                }, options, {
                    uploader: uploader,
                    file: new FileUploader.FileLikeObject(some),
                    isReady: false,
                    isUploading: false,
                    isUploaded: false,
                    isSuccess: false,
                    isCancel: false,
                    isError: false,
                    progress: 0,
                    index: null,
                    _file: file,
                    _input: input
                });

                if (input) this._replaceNode(input);
            }
            /**********************
             * PUBLIC
             **********************/
            /**
             * Uploads a FileItem
             */
            FileItem.prototype.upload = function() {
                this.uploader.uploadItem(this);
            };
            /**
             * Cancels uploading of FileItem
             */
            FileItem.prototype.cancel = function() {
                this.uploader.cancelItem(this);
            };
            /**
             * Removes a FileItem
             */
            FileItem.prototype.remove = function() {
                this.uploader.removeFromQueue(this);
            };
            /**
             * Callback
             * @private
             */
            FileItem.prototype.onBeforeUpload = function() {};
            /**
             * Callback
             * @param {Number} progress
             * @private
             */
            FileItem.prototype.onProgress = function(progress) {};
            /**
             * Callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileItem.prototype.onSuccess = function(response, status, headers) {};
            /**
             * Callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileItem.prototype.onError = function(response, status, headers) {};
            /**
             * Callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileItem.prototype.onCancel = function(response, status, headers) {};
            /**
             * Callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             */
            FileItem.prototype.onComplete = function(response, status, headers) {};
            /**********************
             * PRIVATE
             **********************/
            /**
             * Inner callback
             */
            FileItem.prototype._onBeforeUpload = function() {
                this.isReady = true;
                this.isUploading = true;
                this.isUploaded = false;
                this.isSuccess = false;
                this.isCancel = false;
                this.isError = false;
                this.progress = 0;
                this.onBeforeUpload();
            };
            /**
             * Inner callback
             * @param {Number} progress
             * @private
             */
            FileItem.prototype._onProgress = function(progress) {
                this.progress = progress;
                this.onProgress(progress);
            };
            /**
             * Inner callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileItem.prototype._onSuccess = function(response, status, headers) {
                this.isReady = false;
                this.isUploading = false;
                this.isUploaded = true;
                this.isSuccess = true;
                this.isCancel = false;
                this.isError = false;
                this.progress = 100;
                this.index = null;
                this.onSuccess(response, status, headers);
            };
            /**
             * Inner callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileItem.prototype._onError = function(response, status, headers) {
                this.isReady = false;
                this.isUploading = false;
                this.isUploaded = true;
                this.isSuccess = false;
                this.isCancel = false;
                this.isError = true;
                this.progress = 0;
                this.index = null;
                this.onError(response, status, headers);
            };
            /**
             * Inner callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileItem.prototype._onCancel = function(response, status, headers) {
                this.isReady = false;
                this.isUploading = false;
                this.isUploaded = false;
                this.isSuccess = false;
                this.isCancel = true;
                this.isError = false;
                this.progress = 0;
                this.index = null;
                this.onCancel(response, status, headers);
            };
            /**
             * Inner callback
             * @param {*} response
             * @param {Number} status
             * @param {Object} headers
             * @private
             */
            FileItem.prototype._onComplete = function(response, status, headers) {
                this.onComplete(response, status, headers);
                if (this.removeAfterUpload) this.remove();
            };
            /**
             * Destroys a FileItem
             */
            FileItem.prototype._destroy = function() {
                if (this._input) this._input.remove();
                if (this._form) this._form.remove();
                delete this._form;
                delete this._input;
            };
            /**
             * Prepares to uploading
             * @private
             */
            FileItem.prototype._prepareToUploading = function() {
                this.index = this.index || ++this.uploader._nextIndex;
                this.isReady = true;
            };
            /**
             * Replaces input element on his clone
             * @param {JQLite|jQuery} input
             * @private
             */
            FileItem.prototype._replaceNode = function(input) {
                var clone = $compile(input.clone())(input.scope());
                clone.prop('value', null); // FF fix
                input.css('display', 'none');
                input.after(clone); // remove jquery dependency
            };

            // ---------------------------

            /**
             * Creates instance of {FileDirective} object
             * @param {Object} options
             * @param {Object} options.uploader
             * @param {HTMLElement} options.element
             * @param {Object} options.events
             * @param {String} options.prop
             * @constructor
             */
            function FileDirective(options) {
                angular.extend(this, options);
                this.uploader._directives[this.prop].push(this);
                this._saveLinks();
                this.bind();
            }
            /**
             * Map of events
             * @type {Object}
             */
            FileDirective.prototype.events = {};
            /**
             * Binds events handles
             */
            FileDirective.prototype.bind = function() {
                for(var key in this.events) {
                    var prop = this.events[key];
                    this.element.bind(key, this[prop]);
                }
            };
            /**
             * Unbinds events handles
             */
            FileDirective.prototype.unbind = function() {
                for(var key in this.events) {
                    this.element.unbind(key, this.events[key]);
                }
            };
            /**
             * Destroys directive
             */
            FileDirective.prototype.destroy = function() {
                var index = this.uploader._directives[this.prop].indexOf(this);
                this.uploader._directives[this.prop].splice(index, 1);
                this.unbind();
                // this.element = null;
            };
            /**
             * Saves links to functions
             * @private
             */
            FileDirective.prototype._saveLinks = function() {
                for(var key in this.events) {
                    var prop = this.events[key];
                    this[prop] = this[prop].bind(this);
                }
            };

            // ---------------------------

            FileUploader.inherit(FileSelect, FileDirective);

            /**
             * Creates instance of {FileSelect} object
             * @param {Object} options
             * @constructor
             */
            function FileSelect(options) {
                FileSelect.super_.apply(this, arguments);

                if(!this.uploader.isHTML5) {
                    this.element.removeAttr('multiple');
                }
                this.element.prop('value', null); // FF fix
            }
            /**
             * Map of events
             * @type {Object}
             */
            FileSelect.prototype.events = {
                $destroy: 'destroy',
                change: 'onChange'
            };
            /**
             * Name of property inside uploader._directive object
             * @type {String}
             */
            FileSelect.prototype.prop = 'select';
            /**
             * Returns options
             * @return {Object|undefined}
             */
            FileSelect.prototype.getOptions = function() {};
            /**
             * Returns filters
             * @return {Array<Function>|String|undefined}
             */
            FileSelect.prototype.getFilters = function() {};
            /**
             * If returns "true" then HTMLInputElement will be cleared
             * @returns {Boolean}
             */
            FileSelect.prototype.isEmptyAfterSelection = function() {
                return !!this.element.attr('multiple');
            };
            /**
             * Event handler
             */
            FileSelect.prototype.onChange = function() {
                var files = this.uploader.isHTML5 ? this.element[0].files : this.element[0];
                var options = this.getOptions();
                var filters = this.getFilters();

                if (!this.uploader.isHTML5) this.destroy();
                this.uploader.addToQueue(files, options, filters);
                if (this.isEmptyAfterSelection()) this.element.prop('value', null);
            };

            // ---------------------------

            FileUploader.inherit(FileDrop, FileDirective);

            /**
             * Creates instance of {FileDrop} object
             * @param {Object} options
             * @constructor
             */
            function FileDrop(options) {
                FileDrop.super_.apply(this, arguments);
            }
            /**
             * Map of events
             * @type {Object}
             */
            FileDrop.prototype.events = {
                $destroy: 'destroy',
                drop: 'onDrop',
                dragover: 'onDragOver',
                dragleave: 'onDragLeave'
            };
            /**
             * Name of property inside uploader._directive object
             * @type {String}
             */
            FileDrop.prototype.prop = 'drop';
            /**
             * Returns options
             * @return {Object|undefined}
             */
            FileDrop.prototype.getOptions = function() {};
            /**
             * Returns filters
             * @return {Array<Function>|String|undefined}
             */
            FileDrop.prototype.getFilters = function() {};
            /**
             * Event handler
             */
            FileDrop.prototype.onDrop = function(event) {
                var transfer = this._getTransfer(event);
                if (!transfer) return;
                var options = this.getOptions();
                var filters = this.getFilters();
                this._preventAndStop(event);
                angular.forEach(this.uploader._directives.over, this._removeOverClass, this);
                this.uploader.addToQueue(transfer.files, options, filters);
            };
            /**
             * Event handler
             */
            FileDrop.prototype.onDragOver = function(event) {
                var transfer = this._getTransfer(event);
                if(!this._haveFiles(transfer.types)) return;
                transfer.dropEffect = 'copy';
                this._preventAndStop(event);
                angular.forEach(this.uploader._directives.over, this._addOverClass, this);
            };
            /**
             * Event handler
             */
            FileDrop.prototype.onDragLeave = function(event) {
                if (event.target !== this.element[0]) return;
                this._preventAndStop(event);
                angular.forEach(this.uploader._directives.over, this._removeOverClass, this);
            };
            /**
             * Helper
             */
            FileDrop.prototype._getTransfer = function(event) {
                return event.dataTransfer ? event.dataTransfer : event.originalEvent.dataTransfer; // jQuery fix;
            };
            /**
             * Helper
             */
            FileDrop.prototype._preventAndStop = function(event) {
                event.preventDefault();
                event.stopPropagation();
            };
            /**
             * Returns "true" if types contains files
             * @param {Object} types
             */
            FileDrop.prototype._haveFiles = function(types) {
                if (!types) return false;
                if (types.indexOf) {
                    return types.indexOf('Files') !== -1;
                } else if(types.contains) {
                    return types.contains('Files');
                } else {
                    return false;
                }
            };
            /**
             * Callback
             */
            FileDrop.prototype._addOverClass = function(item) {
                item.addOverClass();
            };
            /**
             * Callback
             */
            FileDrop.prototype._removeOverClass = function(item) {
                item.removeOverClass();
            };

            // ---------------------------

            FileUploader.inherit(FileOver, FileDirective);

            /**
             * Creates instance of {FileDrop} object
             * @param {Object} options
             * @constructor
             */
            function FileOver(options) {
                FileOver.super_.apply(this, arguments);
            }
            /**
             * Map of events
             * @type {Object}
             */
            FileOver.prototype.events = {
                $destroy: 'destroy'
            };
            /**
             * Name of property inside uploader._directive object
             * @type {String}
             */
            FileOver.prototype.prop = 'over';
            /**
             * Over class
             * @type {string}
             */
            FileOver.prototype.overClass = 'nv-file-over';
            /**
             * Adds over class
             */
            FileOver.prototype.addOverClass = function() {
                this.element.addClass(this.getOverClass());
            };
            /**
             * Removes over class
             */
            FileOver.prototype.removeOverClass = function() {
                this.element.removeClass(this.getOverClass());
            };
            /**
             * Returns over class
             * @returns {String}
             */
            FileOver.prototype.getOverClass = function() {
                return this.overClass;
            };

            return FileUploader;
        }])


    .directive('nvFileSelect', ['$parse', 'FileUploader', function($parse, FileUploader) {
        return {
            link: function(scope, element, attributes) {
                var uploader = scope.$eval(attributes.uploader);

                if (!(uploader instanceof FileUploader)) {
                    throw new TypeError('"Uploader" must be an instance of FileUploader');
                }

                var object = new FileUploader.FileSelect({
                    uploader: uploader,
                    element: element
                });

                object.getOptions = $parse(attributes.options).bind(object, scope);
                object.getFilters = function() {return attributes.filters;};
            }
        };
    }])


    .directive('nvFileDrop', ['$parse', 'FileUploader', function($parse, FileUploader) {
        return {
            link: function(scope, element, attributes) {
                var uploader = scope.$eval(attributes.uploader);

                if (!(uploader instanceof FileUploader)) {
                    throw new TypeError('"Uploader" must be an instance of FileUploader');
                }

                if (!uploader.isHTML5) return;

                var object = new FileUploader.FileDrop({
                    uploader: uploader,
                    element: element
                });

                object.getOptions = $parse(attributes.options).bind(object, scope);
                object.getFilters = function() {return attributes.filters;};
            }
        };
    }])

    /**
    * The ng-thumb directive
    * @author: nerv
    * @version: 0.1.2, 2014-01-09
    */
    .directive('ngThumb', ['$window', '$log', function($window, $log) {
        var helper = {
            support: !!($window.FileReader && $window.CanvasRenderingContext2D),
            isFile: function(item) {
                return angular.isObject(item) && item instanceof $window.File;
            },
            isImage: function(file) {
                var type =  '|' + file.type.slice(file.type.lastIndexOf('/') + 1) + '|';
                return '|jpg|png|jpeg|bmp|gif|'.indexOf(type) !== -1;
            }
        };

        return {
            restrict: 'A',
            template: '<canvas style="display : none;/>',
            link: function(scope, element, attributes) {

                var uploader = scope.$parent.uploader;

                if (!helper.support) return;

                var params = scope.$eval(attributes.ngThumb);

                if (!helper.isFile(params.file)) return;
                if (!helper.isImage(params.file)) return;

                var canvas = element.find('canvas');
                var reader = new FileReader();

                reader.onload = onLoadFile;
                reader.readAsDataURL(params.file);

                function onLoadFile(event) {
                    var img = new Image();
                    img.onload = onLoadImage;
                    img.src = event.target.result;
                }

                function onLoadImage() {
                    var xOffSet = 0;
                    var yOffSet = 0;

                    var width = params.width;
                    var height = params.height;

                    if (params.height && params.width) {
                       /* if we have constrains on both height and width */
                       if (this.width >= this.height) {
                         /* if the image is wider than taller */
                         width = this.width / this.height * params.height;
                         xOffSet =(params.width - width) / 2;
                       } else {
                         // if the image is taller than wider
                         height = this.height / this.width * params.width;
                         yOffSet = (params.height - height) / 2;
                       }

                       canvas.attr({width: params.width, height: params.height});
                    } else {
                       /* in the case we have just one constrain this is enough */
                       width = params.width || this.width / this.height * params.height;
                       height = params.height || this.height / this.width * params.width;

                       canvas.attr({width: width, height: height});
                    }

                    canvas[0].getContext('2d').drawImage(this, xOffSet || 0, yOffSet || 0, width, height);

                    $(canvas).show();



                    stackBlurImage(this, canvas[0], 10, true);

                    if(angular.isDefined(uploader) && attributes.blur == true) {
                        uploader.onProgressItem = function(progress) {
                            stackBlurImage(image, canvas[0], 10 - 10 * progress, true);
                        };

                        uploader.onCompleteItem = function() {
                            $log.debug('Item Complete');
                            stackBlurImage(image, canvas[0], 100, true);
                            var ctx = canvas[0].getContext('2d');

                            var errorLabel = 'Error';
                            ctx.font = "100px serif";
                            var text = ctx.measureText(errorLabel);
                            ctx.fillText(errorLabel, 10, 50);
                        };
                    }
                }
              }
        };
    }])

    .directive('nvFileOver', ['FileUploader', function(FileUploader) {
        return {
            link: function(scope, element, attributes) {
                var uploader = scope.$eval(attributes.uploader);

                if (!(uploader instanceof FileUploader)) {
                    throw new TypeError('"Uploader" must be an instance of FileUploader');
                }

                var object = new FileUploader.FileOver({
                    uploader: uploader,
                    element: element
                });

                object.getOverClass = function() {
                    return attributes.overClass || this.overClass;
                };
            }
        };
    }])

    return module;
}));


/*

StackBlur - a fast almost Gaussian Blur For Canvas

Version: 	0.5
Author:		Mario Klingemann
Contact: 	mario@quasimondo.com
Website:	http://www.quasimondo.com/StackBlurForCanvas
Twitter:	@quasimondo

In case you find this class useful - especially in commercial projects -
I am not totally unhappy for a small donation to my PayPal account
mario@quasimondo.de

Or support me on flattr:
https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript

Copyright (c) 2010 Mario Klingemann

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/

var mul_table = [
        512,512,456,512,328,456,335,512,405,328,271,456,388,335,292,512,
        454,405,364,328,298,271,496,456,420,388,360,335,312,292,273,512,
        482,454,428,405,383,364,345,328,312,298,284,271,259,496,475,456,
        437,420,404,388,374,360,347,335,323,312,302,292,282,273,265,512,
        497,482,468,454,441,428,417,405,394,383,373,364,354,345,337,328,
        320,312,305,298,291,284,278,271,265,259,507,496,485,475,465,456,
        446,437,428,420,412,404,396,388,381,374,367,360,354,347,341,335,
        329,323,318,312,307,302,297,292,287,282,278,273,269,265,261,512,
        505,497,489,482,475,468,461,454,447,441,435,428,422,417,411,405,
        399,394,389,383,378,373,368,364,359,354,350,345,341,337,332,328,
        324,320,316,312,309,305,301,298,294,291,287,284,281,278,274,271,
        268,265,262,259,257,507,501,496,491,485,480,475,470,465,460,456,
        451,446,442,437,433,428,424,420,416,412,408,404,400,396,392,388,
        385,381,377,374,370,367,363,360,357,354,350,347,344,341,338,335,
        332,329,326,323,320,318,315,312,310,307,304,302,299,297,294,292,
        289,287,285,282,280,278,275,273,271,269,267,265,263,261,259];


var shg_table = [
	     9, 11, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17,
		17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19,
		19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20,
		20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21,
		21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
		21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22,
		22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
		22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23,
		23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
		23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
		23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
		23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
		24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
		24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
		24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
		24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24 ];

function stackBlurImage( img, canvas, radius, blurAlphaChannel )
{

	var w = canvas.width;
    var h = canvas.height;

    var context = canvas.getContext("2d");
    context.clearRect( 0, 0, w, h );
    context.drawImage( img, 0, 0 );

	if ( isNaN(radius) || radius < 1 ) return;

	if ( blurAlphaChannel )
		stackBlurCanvasRGBA( canvas, 0, 0, w, h, radius );
	else
		stackBlurCanvasRGB( canvas, 0, 0, w, h, radius );
}


function stackBlurCanvasRGBA( canvas, top_x, top_y, width, height, radius )
{
	if ( isNaN(radius) || radius < 1 ) return;
	radius |= 0;

	var context = canvas.getContext("2d");
	var imageData;

	try {
	  try {
		imageData = context.getImageData( top_x, top_y, width, height );
	  } catch(e) {

		// NOTE: this part is supposedly only needed if you want to work with local files
		// so it might be okay to remove the whole try/catch block and just use
		// imageData = context.getImageData( top_x, top_y, width, height );
		try {
			netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
			imageData = context.getImageData( top_x, top_y, width, height );
		} catch(e) {
			alert("Cannot access local image");
			throw new Error("unable to access local image data: " + e);
			return;
		}
	  }
	} catch(e) {
	  alert("Cannot access image");
	  throw new Error("unable to access image data: " + e);
	}

	var pixels = imageData.data;

	var x, y, i, p, yp, yi, yw, r_sum, g_sum, b_sum, a_sum,
	r_out_sum, g_out_sum, b_out_sum, a_out_sum,
	r_in_sum, g_in_sum, b_in_sum, a_in_sum,
	pr, pg, pb, pa, rbs;

	var div = radius + radius + 1;
	var w4 = width << 2;
	var widthMinus1  = width - 1;
	var heightMinus1 = height - 1;
	var radiusPlus1  = radius + 1;
	var sumFactor = radiusPlus1 * ( radiusPlus1 + 1 ) / 2;

	var stackStart = new BlurStack();
	var stack = stackStart;
	for ( i = 1; i < div; i++ )
	{
		stack = stack.next = new BlurStack();
		if ( i == radiusPlus1 ) var stackEnd = stack;
	}
	stack.next = stackStart;
	var stackIn = null;
	var stackOut = null;

	yw = yi = 0;

	var mul_sum = mul_table[radius];
	var shg_sum = shg_table[radius];

	for ( y = 0; y < height; y++ )
	{
		r_in_sum = g_in_sum = b_in_sum = a_in_sum = r_sum = g_sum = b_sum = a_sum = 0;

		r_out_sum = radiusPlus1 * ( pr = pixels[yi] );
		g_out_sum = radiusPlus1 * ( pg = pixels[yi+1] );
		b_out_sum = radiusPlus1 * ( pb = pixels[yi+2] );
		a_out_sum = radiusPlus1 * ( pa = pixels[yi+3] );

		r_sum += sumFactor * pr;
		g_sum += sumFactor * pg;
		b_sum += sumFactor * pb;
		a_sum += sumFactor * pa;

		stack = stackStart;

		for( i = 0; i < radiusPlus1; i++ )
		{
			stack.r = pr;
			stack.g = pg;
			stack.b = pb;
			stack.a = pa;
			stack = stack.next;
		}

		for( i = 1; i < radiusPlus1; i++ )
		{
			p = yi + (( widthMinus1 < i ? widthMinus1 : i ) << 2 );
			r_sum += ( stack.r = ( pr = pixels[p])) * ( rbs = radiusPlus1 - i );
			g_sum += ( stack.g = ( pg = pixels[p+1])) * rbs;
			b_sum += ( stack.b = ( pb = pixels[p+2])) * rbs;
			a_sum += ( stack.a = ( pa = pixels[p+3])) * rbs;

			r_in_sum += pr;
			g_in_sum += pg;
			b_in_sum += pb;
			a_in_sum += pa;

			stack = stack.next;
		}


		stackIn = stackStart;
		stackOut = stackEnd;
		for ( x = 0; x < width; x++ )
		{
			pixels[yi+3] = pa = (a_sum * mul_sum) >> shg_sum;
			if ( pa != 0 )
			{
				pa = 255 / pa;
				pixels[yi]   = ((r_sum * mul_sum) >> shg_sum) * pa;
				pixels[yi+1] = ((g_sum * mul_sum) >> shg_sum) * pa;
				pixels[yi+2] = ((b_sum * mul_sum) >> shg_sum) * pa;
			} else {
				pixels[yi] = pixels[yi+1] = pixels[yi+2] = 0;
			}

			r_sum -= r_out_sum;
			g_sum -= g_out_sum;
			b_sum -= b_out_sum;
			a_sum -= a_out_sum;

			r_out_sum -= stackIn.r;
			g_out_sum -= stackIn.g;
			b_out_sum -= stackIn.b;
			a_out_sum -= stackIn.a;

			p =  ( yw + ( ( p = x + radius + 1 ) < widthMinus1 ? p : widthMinus1 ) ) << 2;

			r_in_sum += ( stackIn.r = pixels[p]);
			g_in_sum += ( stackIn.g = pixels[p+1]);
			b_in_sum += ( stackIn.b = pixels[p+2]);
			a_in_sum += ( stackIn.a = pixels[p+3]);

			r_sum += r_in_sum;
			g_sum += g_in_sum;
			b_sum += b_in_sum;
			a_sum += a_in_sum;

			stackIn = stackIn.next;

			r_out_sum += ( pr = stackOut.r );
			g_out_sum += ( pg = stackOut.g );
			b_out_sum += ( pb = stackOut.b );
			a_out_sum += ( pa = stackOut.a );

			r_in_sum -= pr;
			g_in_sum -= pg;
			b_in_sum -= pb;
			a_in_sum -= pa;

			stackOut = stackOut.next;

			yi += 4;
		}
		yw += width;
	}


	for ( x = 0; x < width; x++ )
	{
		g_in_sum = b_in_sum = a_in_sum = r_in_sum = g_sum = b_sum = a_sum = r_sum = 0;

		yi = x << 2;
		r_out_sum = radiusPlus1 * ( pr = pixels[yi]);
		g_out_sum = radiusPlus1 * ( pg = pixels[yi+1]);
		b_out_sum = radiusPlus1 * ( pb = pixels[yi+2]);
		a_out_sum = radiusPlus1 * ( pa = pixels[yi+3]);

		r_sum += sumFactor * pr;
		g_sum += sumFactor * pg;
		b_sum += sumFactor * pb;
		a_sum += sumFactor * pa;

		stack = stackStart;

		for( i = 0; i < radiusPlus1; i++ )
		{
			stack.r = pr;
			stack.g = pg;
			stack.b = pb;
			stack.a = pa;
			stack = stack.next;
		}

		yp = width;

		for( i = 1; i <= radius; i++ )
		{
			yi = ( yp + x ) << 2;

			r_sum += ( stack.r = ( pr = pixels[yi])) * ( rbs = radiusPlus1 - i );
			g_sum += ( stack.g = ( pg = pixels[yi+1])) * rbs;
			b_sum += ( stack.b = ( pb = pixels[yi+2])) * rbs;
			a_sum += ( stack.a = ( pa = pixels[yi+3])) * rbs;

			r_in_sum += pr;
			g_in_sum += pg;
			b_in_sum += pb;
			a_in_sum += pa;

			stack = stack.next;

			if( i < heightMinus1 )
			{
				yp += width;
			}
		}

		yi = x;
		stackIn = stackStart;
		stackOut = stackEnd;
		for ( y = 0; y < height; y++ )
		{
			p = yi << 2;
			pixels[p+3] = pa = (a_sum * mul_sum) >> shg_sum;
			if ( pa > 0 )
			{
				pa = 255 / pa;
				pixels[p]   = ((r_sum * mul_sum) >> shg_sum ) * pa;
				pixels[p+1] = ((g_sum * mul_sum) >> shg_sum ) * pa;
				pixels[p+2] = ((b_sum * mul_sum) >> shg_sum ) * pa;
			} else {
				pixels[p] = pixels[p+1] = pixels[p+2] = 0;
			}

			r_sum -= r_out_sum;
			g_sum -= g_out_sum;
			b_sum -= b_out_sum;
			a_sum -= a_out_sum;

			r_out_sum -= stackIn.r;
			g_out_sum -= stackIn.g;
			b_out_sum -= stackIn.b;
			a_out_sum -= stackIn.a;

			p = ( x + (( ( p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1 ) * width )) << 2;

			r_sum += ( r_in_sum += ( stackIn.r = pixels[p]));
			g_sum += ( g_in_sum += ( stackIn.g = pixels[p+1]));
			b_sum += ( b_in_sum += ( stackIn.b = pixels[p+2]));
			a_sum += ( a_in_sum += ( stackIn.a = pixels[p+3]));

			stackIn = stackIn.next;

			r_out_sum += ( pr = stackOut.r );
			g_out_sum += ( pg = stackOut.g );
			b_out_sum += ( pb = stackOut.b );
			a_out_sum += ( pa = stackOut.a );

			r_in_sum -= pr;
			g_in_sum -= pg;
			b_in_sum -= pb;
			a_in_sum -= pa;

			stackOut = stackOut.next;

			yi += width;
		}
	}

	context.putImageData( imageData, top_x, top_y );

}


function stackBlurCanvasRGB( canvas, top_x, top_y, width, height, radius )
{
	if ( isNaN(radius) || radius < 1 ) return;
	radius |= 0;

	var context = canvas.getContext("2d");
	var imageData;

	try {
	  try {
		imageData = context.getImageData( top_x, top_y, width, height );
	  } catch(e) {

		// NOTE: this part is supposedly only needed if you want to work with local files
		// so it might be okay to remove the whole try/catch block and just use
		// imageData = context.getImageData( top_x, top_y, width, height );
		try {
			netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
			imageData = context.getImageData( top_x, top_y, width, height );
		} catch(e) {
			alert("Cannot access local image");
			throw new Error("unable to access local image data: " + e);
			return;
		}
	  }
	} catch(e) {
	  alert("Cannot access image");
	  throw new Error("unable to access image data: " + e);
	}

	var pixels = imageData.data;

	var x, y, i, p, yp, yi, yw, r_sum, g_sum, b_sum,
	r_out_sum, g_out_sum, b_out_sum,
	r_in_sum, g_in_sum, b_in_sum,
	pr, pg, pb, rbs;

	var div = radius + radius + 1;
	var w4 = width << 2;
	var widthMinus1  = width - 1;
	var heightMinus1 = height - 1;
	var radiusPlus1  = radius + 1;
	var sumFactor = radiusPlus1 * ( radiusPlus1 + 1 ) / 2;

	var stackStart = new BlurStack();
	var stack = stackStart;
	for ( i = 1; i < div; i++ )
	{
		stack = stack.next = new BlurStack();
		if ( i == radiusPlus1 ) var stackEnd = stack;
	}
	stack.next = stackStart;
	var stackIn = null;
	var stackOut = null;

	yw = yi = 0;

	var mul_sum = mul_table[radius];
	var shg_sum = shg_table[radius];

	for ( y = 0; y < height; y++ )
	{
		r_in_sum = g_in_sum = b_in_sum = r_sum = g_sum = b_sum = 0;

		r_out_sum = radiusPlus1 * ( pr = pixels[yi] );
		g_out_sum = radiusPlus1 * ( pg = pixels[yi+1] );
		b_out_sum = radiusPlus1 * ( pb = pixels[yi+2] );

		r_sum += sumFactor * pr;
		g_sum += sumFactor * pg;
		b_sum += sumFactor * pb;

		stack = stackStart;

		for( i = 0; i < radiusPlus1; i++ )
		{
			stack.r = pr;
			stack.g = pg;
			stack.b = pb;
			stack = stack.next;
		}

		for( i = 1; i < radiusPlus1; i++ )
		{
			p = yi + (( widthMinus1 < i ? widthMinus1 : i ) << 2 );
			r_sum += ( stack.r = ( pr = pixels[p])) * ( rbs = radiusPlus1 - i );
			g_sum += ( stack.g = ( pg = pixels[p+1])) * rbs;
			b_sum += ( stack.b = ( pb = pixels[p+2])) * rbs;

			r_in_sum += pr;
			g_in_sum += pg;
			b_in_sum += pb;

			stack = stack.next;
		}


		stackIn = stackStart;
		stackOut = stackEnd;
		for ( x = 0; x < width; x++ )
		{
			pixels[yi]   = (r_sum * mul_sum) >> shg_sum;
			pixels[yi+1] = (g_sum * mul_sum) >> shg_sum;
			pixels[yi+2] = (b_sum * mul_sum) >> shg_sum;

			r_sum -= r_out_sum;
			g_sum -= g_out_sum;
			b_sum -= b_out_sum;

			r_out_sum -= stackIn.r;
			g_out_sum -= stackIn.g;
			b_out_sum -= stackIn.b;

			p =  ( yw + ( ( p = x + radius + 1 ) < widthMinus1 ? p : widthMinus1 ) ) << 2;

			r_in_sum += ( stackIn.r = pixels[p]);
			g_in_sum += ( stackIn.g = pixels[p+1]);
			b_in_sum += ( stackIn.b = pixels[p+2]);

			r_sum += r_in_sum;
			g_sum += g_in_sum;
			b_sum += b_in_sum;

			stackIn = stackIn.next;

			r_out_sum += ( pr = stackOut.r );
			g_out_sum += ( pg = stackOut.g );
			b_out_sum += ( pb = stackOut.b );

			r_in_sum -= pr;
			g_in_sum -= pg;
			b_in_sum -= pb;

			stackOut = stackOut.next;

			yi += 4;
		}
		yw += width;
	}


	for ( x = 0; x < width; x++ )
	{
		g_in_sum = b_in_sum = r_in_sum = g_sum = b_sum = r_sum = 0;

		yi = x << 2;
		r_out_sum = radiusPlus1 * ( pr = pixels[yi]);
		g_out_sum = radiusPlus1 * ( pg = pixels[yi+1]);
		b_out_sum = radiusPlus1 * ( pb = pixels[yi+2]);

		r_sum += sumFactor * pr;
		g_sum += sumFactor * pg;
		b_sum += sumFactor * pb;

		stack = stackStart;

		for( i = 0; i < radiusPlus1; i++ )
		{
			stack.r = pr;
			stack.g = pg;
			stack.b = pb;
			stack = stack.next;
		}

		yp = width;

		for( i = 1; i <= radius; i++ )
		{
			yi = ( yp + x ) << 2;

			r_sum += ( stack.r = ( pr = pixels[yi])) * ( rbs = radiusPlus1 - i );
			g_sum += ( stack.g = ( pg = pixels[yi+1])) * rbs;
			b_sum += ( stack.b = ( pb = pixels[yi+2])) * rbs;

			r_in_sum += pr;
			g_in_sum += pg;
			b_in_sum += pb;

			stack = stack.next;

			if( i < heightMinus1 )
			{
				yp += width;
			}
		}

		yi = x;
		stackIn = stackStart;
		stackOut = stackEnd;
		for ( y = 0; y < height; y++ )
		{
			p = yi << 2;
			pixels[p]   = (r_sum * mul_sum) >> shg_sum;
			pixels[p+1] = (g_sum * mul_sum) >> shg_sum;
			pixels[p+2] = (b_sum * mul_sum) >> shg_sum;

			r_sum -= r_out_sum;
			g_sum -= g_out_sum;
			b_sum -= b_out_sum;

			r_out_sum -= stackIn.r;
			g_out_sum -= stackIn.g;
			b_out_sum -= stackIn.b;

			p = ( x + (( ( p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1 ) * width )) << 2;

			r_sum += ( r_in_sum += ( stackIn.r = pixels[p]));
			g_sum += ( g_in_sum += ( stackIn.g = pixels[p+1]));
			b_sum += ( b_in_sum += ( stackIn.b = pixels[p+2]));

			stackIn = stackIn.next;

			r_out_sum += ( pr = stackOut.r );
			g_out_sum += ( pg = stackOut.g );
			b_out_sum += ( pb = stackOut.b );

			r_in_sum -= pr;
			g_in_sum -= pg;
			b_in_sum -= pb;

			stackOut = stackOut.next;

			yi += width;
		}
	}

	context.putImageData( imageData, top_x, top_y );

}

function BlurStack()
{
	this.r = 0;
	this.g = 0;
	this.b = 0;
	this.a = 0;
	this.next = null;
};