ZHadmin/pages/QRcoddetails/js/pdfh5.js

(function () {
    'use strict';
    var definePinchZoom = function ($) {
        var PinchZoom = function (el, options, viewerContainer) {
                this.el = $(el);
                this.viewerContainer = viewerContainer;
                this.zoomFactor = 1;
                this.lastScale = 1;
                this.offset = {
                    x: 0,
                    y: 0
                };
                this.options = $.extend({}, this.defaults, options);
                this.setupMarkup();
                this.bindEvents();
                this.update();
                // default enable.
                this.enable();
                this.height = 0;
                this.load = false;
                this.direction = null;
                this.clientY = null;
                this.lastclientY = null;
            },
            sum = function (a, b) {
                return a + b;
            },
            isCloseTo = function (value, expected) {
                return value > expected - 0.01 && value < expected + 0.01;
            };

        PinchZoom.prototype = {

            defaults: {
                tapZoomFactor: 2,
                zoomOutFactor: 1.2,
                animationDuration: 300,
                maxZoom: 4,
                minZoom: 0.8,
                lockDragAxis: false,
                use2d: true,
                zoomStartEventName: 'pz_zoomstart',
                zoomEndEventName: 'pz_zoomend',
                dragStartEventName: 'pz_dragstart',
                dragEndEventName: 'pz_dragend',
                doubleTapEventName: 'pz_doubletap'
            },

            /**
             * Event handler for 'dragstart'
             * @param event
             */
            handleDragStart: function (event) {
                this.el.trigger(this.options.dragStartEventName);
                this.stopAnimation();
                this.lastDragPosition = false;
                this.hasInteraction = true;
                this.handleDrag(event);
            },

            /**
             * Event handler for 'drag'
             * @param event
             */
            handleDrag: function (event) {

                if (this.zoomFactor > 1.0) {
                    var touch = this.getTouches(event)[0];
                    this.drag(touch, this.lastDragPosition, event);
                    this.offset = this.sanitizeOffset(this.offset);
                    this.lastDragPosition = touch;
                }
            },

            handleDragEnd: function () {
                this.el.trigger(this.options.dragEndEventName);
                this.end();
            },

            /**
             * Event handler for 'zoomstart'
             * @param event
             */
            handleZoomStart: function (event) {
                this.el.trigger(this.options.zoomStartEventName);
                this.stopAnimation();
                this.lastScale = 1;
                this.nthZoom = 0;
                this.lastZoomCenter = false;
                this.hasInteraction = true;
            },

            /**
             * Event handler for 'zoom'
             * @param event
             */
            handleZoom: function (event, newScale) {

                // a relative scale factor is used
                var touchCenter = this.getTouchCenter(this.getTouches(event)),
                    scale = newScale / this.lastScale;
                this.lastScale = newScale;

                // the first touch events are thrown away since they are not precise
                this.nthZoom += 1;
                if (this.nthZoom > 3) {

                    this.scale(scale, touchCenter);
                    this.drag(touchCenter, this.lastZoomCenter);
                }
                this.lastZoomCenter = touchCenter;
            },

            handleZoomEnd: function () {
                this.el.trigger(this.options.zoomEndEventName);
                this.end();
            },

            /**
             * Event handler for 'doubletap'
             * @param event
             */
            handleDoubleTap: function (event) {
                var center = this.getTouches(event)[0],
                    zoomFactor = this.zoomFactor > 1 ? 1 : this.options.tapZoomFactor,
                    startZoomFactor = this.zoomFactor,
                    updateProgress = (function (progress) {
                        this.scaleTo(startZoomFactor + progress * (zoomFactor - startZoomFactor), center);
                    }).bind(this);

                if (this.hasInteraction) {
                    return;
                }
                if (startZoomFactor > zoomFactor) {
                    center = this.getCurrentZoomCenter();
                }

                this.animate(this.options.animationDuration, updateProgress, this.swing);
                this.el.trigger(this.options.doubleTapEventName);
            },

            /**
             * Max / min values for the offset
             * @param offset
             * @return {Object} the sanitized offset
             */
            sanitizeOffset: function (offset) {
                var maxX = (this.zoomFactor - 1) * this.getContainerX(),
                    maxY = (this.zoomFactor - 1) * this.getContainerY(),
                    maxOffsetX = Math.max(maxX, 0),
                    maxOffsetY = Math.max(maxY, 0),
                    minOffsetX = Math.min(maxX, 0),
                    minOffsetY = Math.min(maxY, 0);

                var x = Math.min(Math.max(offset.x, minOffsetX), maxOffsetX),
                    y = Math.min(Math.max(offset.y, minOffsetY), maxOffsetY);


                return {
                    x: x,
                    y: y
                };
            },

            /**
             * Scale to a specific zoom factor (not relative)
             * @param zoomFactor
             * @param center
             */
            scaleTo: function (zoomFactor, center) {
                this.scale(zoomFactor / this.zoomFactor, center);
            },

            /**
             * Scales the element from specified center
             * @param scale
             * @param center
             */
            scale: function (scale, center) {
                scale = this.scaleZoomFactor(scale);
                this.addOffset({
                    x: (scale - 1) * (center.x + this.offset.x),
                    y: (scale - 1) * (center.y + this.offset.y)
                });
            },

            /**
             * Scales the zoom factor relative to current state
             * @param scale
             * @return the actual scale (can differ because of max min zoom factor)
             */
            scaleZoomFactor: function (scale) {
                var originalZoomFactor = this.zoomFactor;
                this.zoomFactor *= scale;
                this.zoomFactor = Math.min(this.options.maxZoom, Math.max(this.zoomFactor, this.options.minZoom));
                return this.zoomFactor / originalZoomFactor;
            },

            /**
             * Drags the element
             * @param center
             * @param lastCenter
             */
            drag: function (center, lastCenter, event) {
                if (lastCenter) {
                    if (this.options.lockDragAxis) {
                        // lock scroll to position that was changed the most
                        if (Math.abs(center.x - lastCenter.x) > Math.abs(center.y - lastCenter.y)) {
                            this.addOffset({
                                x: -(center.x - lastCenter.x),
                                y: 0
                            });
                        } else {
                            this.addOffset({
                                y: -(center.y - lastCenter.y),
                                x: 0
                            });
                        }
                    } else {
                        if (center.y - lastCenter.y < 0) {
                            this.direction = "down";
                        } else if (center.y - lastCenter.y > 10) {
                            this.direction = "up";
                        }
                        this.addOffset({
                            y: -(center.y - lastCenter.y),
                            x: -(center.x - lastCenter.x)
                        });
                    }
                }
            },

            /**
             * Calculates the touch center of multiple touches
             * @param touches
             * @return {Object}
             */
            getTouchCenter: function (touches) {
                return this.getVectorAvg(touches);
            },

            /**
             * Calculates the average of multiple vectors (x, y values)
             */
            getVectorAvg: function (vectors) {
                return {
                    x: vectors.map(function (v) {
                        return v.x;
                    }).reduce(sum) / vectors.length,
                    y: vectors.map(function (v) {
                        return v.y;
                    }).reduce(sum) / vectors.length
                };
            },

            /**
             * Adds an offset
             * @param offset the offset to add
             * @return return true when the offset change was accepted
             */
            addOffset: function (offset) {
                this.offset = {
                    x: this.offset.x + offset.x,
                    y: this.offset.y + offset.y
                };
            },

            sanitize: function () {
                if (this.zoomFactor < this.options.zoomOutFactor) {
                    this.zoomOutAnimation();
                } else if (this.isInsaneOffset(this.offset)) {
                    this.sanitizeOffsetAnimation();
                }
            },

            /**
             * Checks if the offset is ok with the current zoom factor
             * @param offset
             * @return {Boolean}
             */
            isInsaneOffset: function (offset) {
                var sanitizedOffset = this.sanitizeOffset(offset);
                return sanitizedOffset.x !== offset.x ||
                    sanitizedOffset.y !== offset.y;
            },

            /**
             * Creates an animation moving to a sane offset
             */
            sanitizeOffsetAnimation: function () {
                var targetOffset = this.sanitizeOffset(this.offset),
                    startOffset = {
                        x: this.offset.x,
                        y: this.offset.y
                    },
                    updateProgress = (function (progress) {
                        this.offset.x = startOffset.x + progress * (targetOffset.x - startOffset.x);
                        this.offset.y = startOffset.y + progress * (targetOffset.y - startOffset.y);
                        this.update();
                    }).bind(this);

                this.animate(
                    this.options.animationDuration,
                    updateProgress,
                    this.swing
                );
            },

            /**
             * Zooms back to the original position,
             * (no offset and zoom factor 1)
             */
            zoomOutAnimation: function () {
                var startZoomFactor = this.zoomFactor,
                    zoomFactor = 1,
                    center = this.getCurrentZoomCenter(),
                    updateProgress = (function (progress) {
                        this.scaleTo(startZoomFactor + progress * (zoomFactor - startZoomFactor), center);
                    }).bind(this);

                this.animate(
                    this.options.animationDuration,
                    updateProgress,
                    this.swing
                );
            },

            /**
             * Updates the aspect ratio
             */
            updateAspectRatio: function () {
                this.setContainerY(this.getContainerX() / this.getAspectRatio());
            },

            /**
             * Calculates the initial zoom factor (for the element to fit into the container)
             * @return the initial zoom factor
             */
            getInitialZoomFactor: function () {
                // use .offsetWidth instead of width()
                // because jQuery-width() return the original width but Zepto-width() will calculate width with transform.
                // the same as .height()
                if(this.container[0] && this.el[0]){
                    return this.container[0].offsetWidth / this.el[0].offsetWidth;
                }else {
                    return 0
                }
            },

            /**
             * Calculates the aspect ratio of the element
             * @return the aspect ratio
             */
            getAspectRatio: function () {
                if(this.el[0]){
                    var offsetHeight = this.el[0].offsetHeight;
                    return this.container[0].offsetWidth / offsetHeight;
                }else {
                    return 0
                }

            },

            /**
             * Calculates the virtual zoom center for the current offset and zoom factor
             * (used for reverse zoom)
             * @return {Object} the current zoom center
             */
            getCurrentZoomCenter: function () {

                // uses following formula to calculate the zoom center x value
                // offset_left / offset_right = zoomcenter_x / (container_x - zoomcenter_x)
                var length = this.container[0].offsetWidth * this.zoomFactor,
                    offsetLeft = this.offset.x,
                    offsetRight = length - offsetLeft - this.container[0].offsetWidth,
                    widthOffsetRatio = offsetLeft / offsetRight,
                    centerX = widthOffsetRatio * this.container[0].offsetWidth / (widthOffsetRatio + 1),

                    // the same for the zoomcenter y
                    height = this.container[0].offsetHeight * this.zoomFactor,
                    offsetTop = this.offset.y,
                    offsetBottom = height - offsetTop - this.container[0].offsetHeight,
                    heightOffsetRatio = offsetTop / offsetBottom,
                    centerY = heightOffsetRatio * this.container[0].offsetHeight / (heightOffsetRatio + 1);

                // prevents division by zero
                if (offsetRight === 0) {
                    centerX = this.container[0].offsetWidth;
                }
                if (offsetBottom === 0) {
                    centerY = this.container[0].offsetHeight;
                }

                return {
                    x: centerX,
                    y: centerY
                };
            },

            canDrag: function () {
                return !isCloseTo(this.zoomFactor, 1);
            },

            /**
             * Returns the touches of an event relative to the container offset
             * @param event
             * @return array touches
             */
            getTouches: function (event) {
                var position = this.container.offset();
                return Array.prototype.slice.call(event.touches).map(function (touch) {
                    return {
                        x: touch.pageX - position.left,
                        y: touch.pageY - position.top
                    };
                });
            },

            /**
             * Animation loop
             * does not support simultaneous animations
             * @param duration
             * @param framefn
             * @param timefn
             * @param callback
             */
            animate: function (duration, framefn, timefn, callback) {
                var startTime = new Date().getTime(),
                    renderFrame = (function () {
                        if (!this.inAnimation) {
                            return;
                        }
                        var frameTime = new Date().getTime() - startTime,
                            progress = frameTime / duration;
                        if (frameTime >= duration) {
                            framefn(1);
                            if (callback) {
                                callback();
                            }
                            this.update();
                            this.stopAnimation();
                            this.update();
                        } else {
                            if (timefn) {
                                progress = timefn(progress);
                            }
                            framefn(progress);
                            this.update();
                            requestAnimationFrame(renderFrame);
                        }
                    }).bind(this);
                this.inAnimation = true;
                requestAnimationFrame(renderFrame);
            },

            /**
             * Stops the animation
             */
            stopAnimation: function () {
                this.inAnimation = false;

            },

            /**
             * Swing timing function for animations
             * @param p
             * @return {Number}
             */
            swing: function (p) {
                return -Math.cos(p * Math.PI) / 2 + 0.5;
            },

            getContainerX: function () {
                if(this.el[0]){
                    return this.el[0].offsetWidth;
                }else {
                    return 0;
                }
            },

            getContainerY: function () {
                return this.el[0].offsetHeight;
            },
            setContainerY: function (y) {
                y = y.toFixed(2);
                return this.container.height(y);
            },

            /**
             * Creates the expected html structure
             */
            setupMarkup: function () {
                this.container = $('<div class="pinch-zoom-container"></div>');
                this.el.before(this.container);
                this.container.append(this.el);

                this.container.css({
                    'position': 'relative',
                    //                  'width':'auto',
                    //                  'height':'auto'
                });

                // Zepto doesn't recognize `webkitTransform..` style
                this.el.css({
                    '-webkit-transform-origin': '0% 0%',
                    '-moz-transform-origin': '0% 0%',
                    '-ms-transform-origin': '0% 0%',
                    '-o-transform-origin': '0% 0%',
                    'transform-origin': '0% 0%',
                    'position': 'relative'
                });

            },

            end: function () {
                this.hasInteraction = false;
                this.sanitize();
                this.update();

            },

            /**
             * Binds all required event listeners
             */
            bindEvents: function () {
                detectGestures(this.container.eq(0), this, this.viewerContainer);
                // Zepto and jQuery both know about `on`
                $(window).on('resize', this.update.bind(this));
                $(this.el).find('img').on('load', this.update.bind(this));

            },

            /**
             * Updates the css values according to the current zoom factor and offset
             */
            update: function () {

                if (this.updatePlaned) {
                    return;
                }
                this.updatePlaned = true;
                setTimeout((function () {
                    this.updatePlaned = false;
                    this.updateAspectRatio();
                    var zoomFactor = this.getInitialZoomFactor() * this.zoomFactor,
                        offsetX = (-this.offset.x / zoomFactor).toFixed(3),
                        offsetY = (-this.offset.y / zoomFactor).toFixed(3);
                    this.lastclientY = offsetY;

                    var transform3d = 'scale3d(' + zoomFactor + ', ' + zoomFactor + ',1) ' +
                        'translate3d(' + offsetX + 'px,' + offsetY + 'px,0px)',
                        transform2d = 'scale(' + zoomFactor + ', ' + zoomFactor + ') ' +
                            'translate(' + offsetX + 'px,' + offsetY + 'px)',
                        removeClone = (function () {
                            if (this.clone) {
                                this.clone.remove();
                                delete this.clone;
                            }
                        }).bind(this);
                    // Scale 3d and translate3d are faster (at least on ios)
                    // but they also reduce the quality.
                    // PinchZoom uses the 3d transformations during interactions
                    // after interactions it falls back to 2d transformations
                    if (!this.options.use2d || this.hasInteraction || this.inAnimation) {
                        this.is3d = true;
                        //                      removeClone();
                        this.el.css({
                            '-webkit-transform': transform3d,
                            '-o-transform': transform2d,
                            '-ms-transform': transform2d,
                            '-moz-transform': transform2d,
                            'transform': transform3d
                        });
                    } else {

                        // When changing from 3d to 2d transform webkit has some glitches.
                        // To avoid this, a copy of the 3d transformed element is displayed in the
                        // foreground while the element is converted from 3d to 2d transform
                        if (this.is3d) {
                            //                          this.clone = this.el.clone();
                            //                          this.clone.css('pointer-events', 'none');
                            //                          this.clone.appendTo(this.container);
                            //                          setTimeout(removeClone, 200);
                        }
                        this.el.css({
                            '-webkit-transform': transform2d,
                            '-o-transform': transform2d,
                            '-ms-transform': transform2d,
                            '-moz-transform': transform2d,
                            'transform': transform2d
                        });
                        this.is3d = false;
                    }
                    this.done && this.done.call(this, zoomFactor)
                }).bind(this), 0);
            },

            /**
             * Enables event handling for gestures
             */
            enable: function () {
                this.enabled = true;

            },

            /**
             * Disables event handling for gestures
             */
            disable: function () {
                this.enabled = false;
            },
            //销毁还原
            destroy: function () {
                var dom = this.el.clone();
                var p = this.container.parent();
                this.container.remove();
                dom.removeAttr('style');
                p.append(dom);
            }
        };

        var detectGestures = function (el, target, viewerContainer) {
            var interaction = null,
                fingers = 0,
                lastTouchStart = null,
                startTouches = null,
                lastTouchY = null,
                clientY = null,
                lastclientY = 0,
                lastTop = 0,
                setInteraction = function (newInteraction, event) {
                    if (interaction !== newInteraction) {

                        if (interaction && !newInteraction) {
                            switch (interaction) {
                                case "zoom":
                                    target.handleZoomEnd(event);
                                    break;
                                case 'drag':
                                    target.handleDragEnd(event);
                                    break;
                            }
                        }

                        switch (newInteraction) {
                            case 'zoom':
                                target.handleZoomStart(event);
                                break;
                            case 'drag':
                                target.handleDragStart(event);
                                break;
                        }
                    }
                    interaction = newInteraction;
                },

                updateInteraction = function (event) {
                    if (fingers === 2) {
                        setInteraction('zoom');
                    } else if (fingers === 1 && target.canDrag()) {
                        setInteraction('drag', event);
                    } else {
                        setInteraction(null, event);
                    }
                },

                targetTouches = function (touches) {
                    return Array.prototype.slice.call(touches).map(function (touch) {
                        return {
                            x: touch.pageX,
                            y: touch.pageY
                        };
                    });
                },

                getDistance = function (a, b) {
                    var x, y;
                    x = a.x - b.x;
                    y = a.y - b.y;
                    return Math.sqrt(x * x + y * y);
                },

                calculateScale = function (startTouches, endTouches) {
                    var startDistance = getDistance(startTouches[0], startTouches[1]),
                        endDistance = getDistance(endTouches[0], endTouches[1]);
                    return endDistance / startDistance;
                },

                cancelEvent = function (event) {
                    event.stopPropagation();
                    event.preventDefault();
                },

                detectDoubleTap = function (event) {
                    var time = (new Date()).getTime();
                    var pageY = event.changedTouches[0].pageY;
                    var top = parentNode.scrollTop || 0;
                    if (fingers > 1) {
                        lastTouchStart = null;
                        lastTouchY = null;
                        cancelEvent(event);
                    }

                    if (time - lastTouchStart < 300 && Math.abs(pageY - lastTouchY) < 10 && Math.abs(lastTop - top) < 10) {
                        cancelEvent(event);
                        target.handleDoubleTap(event);
                        switch (interaction) {
                            case "zoom":
                                target.handleZoomEnd(event);
                                break;
                            case 'drag':
                                target.handleDragEnd(event);
                                break;
                        }
                    }

                    if (fingers === 1) {
                        lastTouchStart = time;
                        lastTouchY = pageY;
                        lastTop = top;
                    }
                },
                firstMove = true;
            if(viewerContainer){
                var parentNode = viewerContainer[0];
            }
            if (parentNode) {
                parentNode.addEventListener('touchstart', function (event) {
                    if (target.enabled) {
                        firstMove = true;
                        fingers = event.touches.length;
                        detectDoubleTap(event);
                        clientY = event.changedTouches[0].clientY;
                        if (fingers > 1) {
                            cancelEvent(event);
                        }
                    }
                });

                parentNode.addEventListener('touchmove', function (event) {
                    if (target.enabled) {
                        lastclientY = event.changedTouches[0].clientY;
                        if (firstMove) {
                            updateInteraction(event);
                            if (interaction) {
                                //                          cancelEvent(event);
                            }
                            startTouches = targetTouches(event.touches);
                        } else {
                            switch (interaction) {
                                case 'zoom':
                                    target.handleZoom(event, calculateScale(startTouches, targetTouches(event.touches)));
                                    break;
                                case 'drag':
                                    target.handleDrag(event);
                                    break;
                            }
                            if (interaction) {
                                //                          cancelEvent(event);
                                target.update(lastclientY);
                            }
                        }
                        if (fingers > 1) {
                            cancelEvent(event);
                        }
                        firstMove = false;
                    }
                });

                parentNode.addEventListener('touchend', function (event) {
                    if (target.enabled) {
                        fingers = event.touches.length;
                        if (fingers > 1) {
                            cancelEvent(event);
                        }
                        updateInteraction(event);
                    }
                });
            }

        };

        return PinchZoom;
    };
    var PinchZoom = definePinchZoom($);
    var Pdfh5 = function (dom, options) {
        this.container = $(dom);
        this.currentNum = 1; //当前页数从1开始
        this.thePDF = null;
        this.pdfRender = null;
        this.totalNum = null;
        this.pdfLoaded = false;
        this.pages = null;
        this.initTime = 0;
        this.startTime = 0;
        this.endTime = 0;
        this.renderTime = 0;
        this.timer = null;
        this.loadWidth = 1;
        this.docWidth = document.documentElement.clientWidth;
        this.init(options);
    };
    Pdfh5.prototype = {
        init: function (options) {
            var self = this;
            if (self.pdfLoaded) {
                return;
            }
            this.initTime = new Date().getTime();
            setTimeout(function () {
                self.start && self.start(self.initTime)
            }, 0)
            options = options ? options : {};
            options.pdfurl = options.pdfurl ? options.pdfurl : null;
            options.data = options.data ? options.data : null;
            var html = '<div class="loadingBar">' +
                '<div class="progress">' +
                ' <div class="glimmer">' +
                '</div>' +
                ' </div>' +
                '</div>' +
                '<div class="pageNum">' +
                '<div class="pageNum-bg"></div>' +
                ' <div class="pageNum-num">' +
                ' <span class="pageNow">1</span>/' +
                '<span class="pageTotal">1</span>' +
                '</div>' +
                ' </div>' +
                '<div class="backTop">' +
                '</div>' +
                '<div class="loadEffect"></div>'
            ;
            if (!this.container.find('.pageNum')[0]) {
                this.container.append(html);
            }
            var viewer = document.createElement("div");
            viewer.className = 'pdfViewer';
            var viewerContainer = document.createElement("div");
            viewerContainer.className = 'viewerContainer';
            viewerContainer.appendChild(viewer);
            this.container.append(viewerContainer);
            this.viewer = $(viewer);
            this.viewerContainer = $(viewerContainer);
            this.pageNum = this.container.find('.pageNum');
            this.pageNow = this.pageNum.find('.pageNow');
            this.pageTotal = this.pageNum.find('.pageTotal');
            this.loadingBar = this.container.find('.loadingBar');
            this.progress = this.loadingBar.find('.progress');
            this.backTop = this.container.find('.backTop');
            this.loading = this.container.find('.loadEffect');
            var height = document.documentElement.clientHeight * (1 / 3);
            viewerContainer.addEventListener('scroll', function () {
                var scrollTop = viewerContainer.scrollTop;
                if (scrollTop >= 150) {
                    if(self.backTop){
                        self.backTop.show();
                    }
                } else {
                    if(self.backTop){
                        self.backTop.fadeOut(200);
                    }
                }
                if(self.viewerContainer){
                    self.pages = self.viewerContainer.find('.page');
                }
                clearTimeout(self.timer);
                if(self.pageNum){
                    self.pageNum.show();
                }
                if(self.pages){
                    self.pages.each(function (index, obj) {
                        var top = obj.getBoundingClientRect().top;
                        var bottom = obj.getBoundingClientRect().bottom;
                        if (top <= height && bottom > height) {
                            if(self.pageNum){
                                self.pageNow.text(index + 1)
                            }
                        }
                    })
                }
                self.timer = setTimeout(function () {
                    if(self.pageNum){
                        self.pageNum.fadeOut(200);
                    }
                }, 1500)
                self.scroll && self.scroll(scrollTop);
            })
            this.backTop.on('click tap', function () {
                var mart = self.viewer.css('transform');
                var arr = mart.replace(/[a-z\(\)\s]/g, '').split(',');
                var s1 = arr[0];
                var s2 = arr[3];
                var x = arr[4] / 2;
                var left = self.viewer[0].getBoundingClientRect().left;
                if (left <= -self.docWidth * 2) {
                    x = -self.docWidth / 2
                }
                self.viewer.css({
                    transform: 'scale(' + s1 + ', ' + s2 + ') translate(' + x + 'px, 0px)'
                })
                if (self.PinchZoom) {
                    self.PinchZoom.offset.y = 0;
                    self.PinchZoom.lastclientY = 0;
                }
                self.viewerContainer.animate({
                    scrollTop: 0
                }, 300)

            })
            //获取url带的参数地址
            function GetQueryString(name) {
                var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
                var r = window.location.search.substr(1).match(reg);
                if (r != null) return decodeURIComponent(r[2]);
                return "";
            }
            var pdfurl = GetQueryString("file");
            if (pdfurl) {
                getDoc(pdfurl)
            } else if(options.pdfurl){
                getDoc(options.pdfurl)
            } else {
                setTimeout(function () {
                    var time = new Date().getTime();
                    self.endTime = time - self.initTime;
                    self.complete && self.complete("error", "文件路径不能为空", self.endTime)
                    self.error && self.error("error", "文件路径不能为空", self.endTime)
                }, 0)

            }

            function getDoc(array) {
                if (self.pdfLoaded) {
                    return;
                }
                pdfjsLib.getDocument(array).then(function (pdf) {
                    if (self.pdfLoaded) {
                        return;
                    }
                    self.thePDF = pdf;
                    self.totalNum = pdf.numPages;
                    self.thePDF.getPage(1).then(handlePages);
                    self.pageTotal.text(self.totalNum)
                    var time = new Date().getTime();
                    self.startTime = time - self.initTime;
                    self.renderStart && self.renderStart(self.startTime)
                }).catch(function (err) {
                    var time = new Date().getTime();
                    self.endTime = time - self.initTime;
                    self.complete && self.complete("error", err.responseText, self.endTime)
                    self.error && self.error("error", err.responseText, self.endTime)
                })
            }
            function handlePages(page) {
                if (self.pdfLoaded) {
                    return;
                }
                if (!options || !options.scale) {
                    if (self.totalNum === 1) {
                        options.scale = 1.8
                    } else {
                        options.scale = 2.5
                        // options.scale = 1.8
                    }
                }
                if (options && options.defalutScale) {
                    if (self.totalNum === 1) {
                        options.scale = options.defalutScale
                        // options.scale = 1.8
                    } else {
                        options.scale = 2.5
                        // options.scale = 1.8
                    }
                }
                var viewport = page.getViewport(options.scale);
                var canvas = document.createElement("canvas");
                var winRatio = ($(window).width() / viewport.width) * 1;
                var obj = {
                    'Cheight': viewport.height * winRatio,
                    'width': viewport.width,
                    'height': viewport.height,
                    'canvas': canvas,
                    'index': self.currentNum
                }
                var context = canvas.getContext('2d');
                canvas.height = viewport.height;
                canvas.width = viewport.width;
                //在canvas上绘制
                self.pdfRender = page.render({
                    canvasContext: context,
                    viewport: viewport
                });
                obj.src = obj.canvas.toDataURL("image/jpeg");

                self.pdfRender.promise.then(function () {
                    self.render(obj);
                }).then(function () {
                    //开始下一页到绘制
                    self.currentNum++;

                    if (!self.pdfLoaded && self.thePDF && self.currentNum <= self.totalNum) {
                        self.thePDF.getPage(self.currentNum).then(handlePages);
                    } else {
                        self.pdfLoaded = true;
                        if (self.viewerContainer) {
                            self.pages = self.viewerContainer.find('.page');
                        }
                        self.currentNum = self.totalNum;
                        var time = new Date().getTime();
                        self.endTime = time - self.initTime;
                        if (self.progress) {
                            self.progress.css({
                                width: "100%"
                            })
                        }
                        if (self.loadingBar) {
                            self.loadingBar.fadeOut(200);
                        }
                        self.renderEnd && self.renderEnd(self.endTime)
                        self.complete && self.complete("success", "PDF解析完毕", self.endTime)
                        self.success && self.success("success", "PDF解析完毕", self.endTime)
                        self.PinchZoom = new PinchZoom(self.viewer, {}, self.viewerContainer);

                        self.PinchZoom.done = function (scale) {
                            if (scale == 1) {
                                if (self.viewerContainer) {
                                    self.viewerContainer.css({
                                        '-webkit-overflow-scrolling': 'touch'
                                    })
                                }

                            } else {
                                if (self.viewerContainer) {
                                    self.viewerContainer.css({
                                        '-webkit-overflow-scrolling': 'auto'
                                    })
                                }
                            }
                            self.zoomChange && self.zoomChange(scale)
                        }
                    }
                }).catch(function(err){
                    console.log(err)
                })

            }
        },
        render: function (obj) {
            if (this.pdfLoaded) {
                return;
            }
            var img = new Image();
            var time = new Date().getTime();
            var time2 = 0;
            if (this.renderTime == 0) {
                time2 = time - this.startTime
            } else {
                time2 = time - this.renderTime
            }
            obj.src = obj.canvas.toDataURL("image/jpeg");
            img.src = obj.src;
            var page = document.createElement("div");
            page.className = "page page" + obj.index;
            page.setAttribute('data-index', obj.index);
            $(page).css({
                'max-width': obj.width
            })
            page.appendChild(img);
            if (this.viewer) {
                this.viewer.append(page);
            }
            if (this.currentNum == 1) {
                this.loadWidth = 100 / this.totalNum;
                if (this.loadingBa) {
                    this.loadingBar.show();
                }
                if (this.loading) {
                    this.loading.fadeOut(200);
                }
            }
            if (this.progress) {
                this.progress.css({
                    width: this.loadWidth * this.currentNum + "%"
                })
            }
            this.renderPages && this.renderPages(page, time - this.initTime, time2)
            this.renderTime = time;
        },
        show: function (callback) {
            this.container.show();
            callback && callback.call(this)
        },
        hide: function (callback) {
            this.container.hide()
            callback && callback.call(this)
        },
        reset: function (callback) {
            if (this.PinchZoom) {
                this.PinchZoom.offset.y = 0;
                this.PinchZoom.offset.x = 0;
                this.PinchZoom.lastclientY = 0;
                this.PinchZoom.zoomFactor = 1;
                this.PinchZoom.update();
            }
            if (this.viewerContainer) {
                this.viewerContainer.scrollTop(0);
            }
            callback && callback.call(this)
        },
        destroy: function (callback) {
            var self = this;
            this.reset();
            if(this.thePDF){
                this.thePDF.destroy();
                this.thePDF = null;
            }
            if(this.pdfRender){
                this.pdfRender.cancel();
                this.pdfRender = null;
            }
            if(this.viewerContainer){
                this.viewerContainer.remove();
                this.viewerContainer = null;
            }
            if(this.container){
                this.container.html('');
                this.container = null;
            }
            this.backTop.off('tap');
            this.backTop.off('click');
            this.pdfLoaded = true;
            this.currentNum = 1;
            this.totalNum = null;
            this.pages = null;
            this.initTime = 0;
            this.startTime = 0;
            this.endTime = 0;
            this.renderTime = 0;
            this.viewer = null;
            this.pageNum = null;
            this.pageNow = null;
            this.pageTotal = null;
            this.loadingBar = null;
            this.progress = null;
            this.loading = null;
            this.timer = null;
            this.loadWidth = 1;
            this.show = null;
            this.hide = null;
            callback && callback.call(this)
        }
    }


    if (typeof define !== 'undefined' && define.amd) {
        define(['jquery'], function ($) {
            return Pdfh5
        });
    } else {
        window.Pdfh5 = Pdfh5
    }
}).call(this);