/**
 * @license Highcharts JS v6.0.3 (2017-11-14)
 * Client side exporting module
 *
 * (c) 2015 Torstein Honsi / Oystein Moseng
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function(factory) {
    if (typeof module === 'object' && module.exports) {
        module.exports = factory;
    } else {
        factory(Highcharts);
    }
}(function(Highcharts) {
    (function(Highcharts) {
        /**
         * Client side exporting module
         *
         * (c) 2015 Torstein Honsi / Oystein Moseng
         *
         * License: www.highcharts.com/license
         */

        /* global MSBlobBuilder */

        var merge = Highcharts.merge,
            win = Highcharts.win,
            nav = win.navigator,
            doc = win.document,
            each = Highcharts.each,
            domurl = win.URL || win.webkitURL || win,
            isMSBrowser = /Edge\/|Trident\/|MSIE /.test(nav.userAgent),
            isEdgeBrowser = /Edge\/\d+/.test(nav.userAgent),
            // Milliseconds to defer image load event handlers to offset IE bug
            loadEventDeferDelay = isMSBrowser ? 150 : 0;

        // Dummy object so we can reuse our canvas-tools.js without errors
        Highcharts.CanVGRenderer = {};


        /**
         * Downloads a script and executes a callback when done.
         * @param {String} scriptLocation
         * @param {Function} callback
         */
        function getScript(scriptLocation, callback) {
            var head = doc.getElementsByTagName('head')[0],
                script = doc.createElement('script');

            script.type = 'text/javascript';
            script.src = scriptLocation;
            script.onload = callback;
            script.onerror = function() {
                Highcharts.error('Error loading script ' + scriptLocation);
            };

            head.appendChild(script);
        }

        // Convert dataURL to Blob if supported, otherwise returns undefined
        Highcharts.dataURLtoBlob = function(dataURL) {
            if (
                win.atob &&
                win.ArrayBuffer &&
                win.Uint8Array &&
                win.Blob &&
                domurl.createObjectURL
            ) {
                // Try to convert data URL to Blob
                var parts = dataURL.match(/data:([^;]*)(;base64)?,([0-9A-Za-z+/]+)/),
                    binStr = win.atob(parts[3]), // Assume base64 encoding
                    buf = new win.ArrayBuffer(binStr.length),
                    binary = new win.Uint8Array(buf),
                    blob;

                for (var i = 0; i < binary.length; ++i) {
                    binary[i] = binStr.charCodeAt(i);
                }

                blob = new win.Blob([binary], {
                    'type': parts[1]
                });
                return domurl.createObjectURL(blob);
            }
        };

        // Download contents by dataURL/blob
        Highcharts.downloadURL = function(dataURL, filename) {
            var a = doc.createElement('a'),
                windowRef;

            // IE specific blob implementation
            // Don't use for normal dataURLs
            if (
                typeof dataURL !== 'string' &&
                !(dataURL instanceof String) &&
                nav.msSaveOrOpenBlob
            ) {
                nav.msSaveOrOpenBlob(dataURL, filename);
                return;
            }

            // Some browsers have limitations for data URL lengths. Try to convert to
            // Blob or fall back. Edge always needs that blob.
            if (isEdgeBrowser || dataURL.length > 2000000) {
                dataURL = Highcharts.dataURLtoBlob(dataURL);
                if (!dataURL) {
                    throw 'Data URL length limit reached';
                }
            }

            // Try HTML5 download attr if supported
            if (a.download !== undefined) {
                a.href = dataURL;
                a.download = filename; // HTML5 download attribute
                doc.body.appendChild(a);
                a.click();
                doc.body.removeChild(a);
            } else {
                // No download attr, just opening data URI
                try {
                    windowRef = win.open(dataURL, 'chart');
                    if (windowRef === undefined || windowRef === null) {
                        throw 'Failed to open window';
                    }
                } catch (e) {
                    // window.open failed, trying location.href
                    win.location.href = dataURL;
                }
            }
        };

        // Get blob URL from SVG code. Falls back to normal data URI.
        Highcharts.svgToDataUrl = function(svg) {
            // Webkit and not chrome
            var webKit = (
                nav.userAgent.indexOf('WebKit') > -1 &&
                nav.userAgent.indexOf('Chrome') < 0
            );
            try {
                // Safari requires data URI since it doesn't allow navigation to blob
                // URLs. Firefox has an issue with Blobs and internal references,
                // leading to gradients not working using Blobs (#4550)
                if (!webKit && nav.userAgent.toLowerCase().indexOf('firefox') < 0) {
                    return domurl.createObjectURL(new win.Blob([svg], {
                        type: 'image/svg+xml;charset-utf-16'
                    }));
                }
            } catch (e) {
                // Ignore
            }
            return 'data:image/svg+xml;charset=UTF-8,' + encodeURIComponent(svg);
        };

        // Get data:URL from image URL
        // Pass in callbacks to handle results. finallyCallback is always called at the
        // end of the process. Supplying this callback is optional. All callbacks
        // receive four arguments: imageURL, imageType, callbackArgs and scale.
        // callbackArgs is used only by callbacks and can contain whatever.
        Highcharts.imageToDataUrl = function(
            imageURL,
            imageType,
            callbackArgs,
            scale,
            successCallback,
            taintedCallback,
            noCanvasSupportCallback,
            failedLoadCallback,
            finallyCallback
        ) {
            var img = new win.Image(),
                taintedHandler,
                loadHandler = function() {
                    setTimeout(function() {
                        var canvas = doc.createElement('canvas'),
                            ctx = canvas.getContext && canvas.getContext('2d'),
                            dataURL;
                        try {
                            if (!ctx) {
                                noCanvasSupportCallback(
                                    imageURL,
                                    imageType,
                                    callbackArgs,
                                    scale
                                );
                            } else {
                                canvas.height = img.height * scale;
                                canvas.width = img.width * scale;
                                ctx.drawImage(img, 0, 0, canvas.width, canvas.height);

                                // Now we try to get the contents of the canvas.
                                try {
                                    dataURL = canvas.toDataURL(imageType);
                                    successCallback(
                                        dataURL,
                                        imageType,
                                        callbackArgs,
                                        scale
                                    );
                                } catch (e) {
                                    taintedHandler(
                                        imageURL,
                                        imageType,
                                        callbackArgs,
                                        scale
                                    );
                                }
                            }
                        } finally {
                            if (finallyCallback) {
                                finallyCallback(
                                    imageURL,
                                    imageType,
                                    callbackArgs,
                                    scale
                                );
                            }
                        }
                        // IE bug where image is not always ready despite calling load
                        // event.
                    }, loadEventDeferDelay);
                },
                // Image load failed (e.g. invalid URL)
                errorHandler = function() {
                    failedLoadCallback(imageURL, imageType, callbackArgs, scale);
                    if (finallyCallback) {
                        finallyCallback(imageURL, imageType, callbackArgs, scale);
                    }
                };

            // This is called on load if the image drawing to canvas failed with a
            // security error. We retry the drawing with crossOrigin set to Anonymous.
            taintedHandler = function() {
                img = new win.Image();
                taintedHandler = taintedCallback;
                // Must be set prior to loading image source
                img.crossOrigin = 'Anonymous';
                img.onload = loadHandler;
                img.onerror = errorHandler;
                img.src = imageURL;
            };

            img.onload = loadHandler;
            img.onerror = errorHandler;
            img.src = imageURL;
        };

        /**
         * Get data URL to an image of an SVG and call download on it
         *
         * options object:
         * - filename: Name of resulting downloaded file without extension
         * - type: File type of resulting download
         * - scale: Scaling factor of downloaded image compared to source
         * - libURL: URL pointing to location of dependency scripts to download on
         *   demand
         */
        Highcharts.downloadSVGLocal = function(
            svg,
            options,
            failCallback,
            successCallback
        ) {
            var svgurl,
                blob,
                objectURLRevoke = true,
                finallyHandler,
                libURL = options.libURL || Highcharts.getOptions().exporting.libURL,
                dummySVGContainer = doc.createElement('div'),
                imageType = options.type || 'image/png',
                filename = (
                    (options.filename || 'chart') +
                    '.' +
                    (imageType === 'image/svg+xml' ? 'svg' : imageType.split('/')[1])
                ),
                scale = options.scale || 1;

            // Allow libURL to end with or without fordward slash
            libURL = libURL.slice(-1) !== '/' ? libURL + '/' : libURL;

            function svgToPdf(svgElement, margin) {
                var width = svgElement.width.baseVal.value + 2 * margin,
                    height = svgElement.height.baseVal.value + 2 * margin,
                    pdf = new win.jsPDF( // eslint-disable-line new-cap
                        'l',
                        'pt', [width, height]
                    );

                // Workaround for #7090, hidden elements were drawn anyway. It comes 
                // down to https://github.com/yWorks/svg2pdf.js/issues/28. Check this 
                // later.
                each(
                    svgElement.querySelectorAll('*[visibility="hidden"]'),
                    function(node) {
                        node.parentNode.removeChild(node);
                    }
                );

                win.svg2pdf(svgElement, pdf, {
                    removeInvalid: true
                });
                return pdf.output('datauristring');
            }

            function downloadPDF() {
                dummySVGContainer.innerHTML = svg;
                var textElements = dummySVGContainer.getElementsByTagName('text'),
                    titleElements,
                    svgData,
                    svgElementStyle = dummySVGContainer
                    .getElementsByTagName('svg')[0].style;

                // Workaround for the text styling. Making sure it does pick up the root
                // element
                each(textElements, function(el) {
                    // Workaround for the text styling. making sure it does pick up the
                    // root element
                    each(['font-family', 'font-size'], function(property) {
                        if (!el.style[property] && svgElementStyle[property]) {
                            el.style[property] = svgElementStyle[property];
                        }
                    });
                    el.style['font-family'] = (
                        el.style['font-family'] &&
                        el.style['font-family'].split(' ').splice(-1)
                    );

                    // Workaround for plotband with width, removing title from text
                    // nodes
                    titleElements = el.getElementsByTagName('title');
                    each(titleElements, function(titleElement) {
                        el.removeChild(titleElement);
                    });
                });
                svgData = svgToPdf(dummySVGContainer.firstChild, 0);
                try {
                    Highcharts.downloadURL(svgData, filename);
                    if (successCallback) {
                        successCallback();
                    }
                } catch (e) {
                    failCallback();
                }
            }

            // Initiate download depending on file type
            if (imageType === 'image/svg+xml') {
                // SVG download. In this case, we want to use Microsoft specific Blob if
                // available
                try {
                    if (nav.msSaveOrOpenBlob) {
                        blob = new MSBlobBuilder();
                        blob.append(svg);
                        svgurl = blob.getBlob('image/svg+xml');
                    } else {
                        svgurl = Highcharts.svgToDataUrl(svg);
                    }
                    Highcharts.downloadURL(svgurl, filename);
                    if (successCallback) {
                        successCallback();
                    }
                } catch (e) {
                    failCallback();
                }
            } else if (imageType === 'application/pdf') {
                if (win.jsPDF && win.svg2pdf) {
                    downloadPDF();
                } else {
                    // Must load pdf libraries first. // Don't destroy the object URL
                    // yet since we are doing things asynchronously. A cleaner solution
                    // would be nice, but this will do for now.
                    objectURLRevoke = true;
                    getScript(libURL + 'jspdf.js', function() {
                        getScript(libURL + 'svg2pdf.js', function() {
                            downloadPDF();
                        });
                    });
                }
            } else {
                // PNG/JPEG download - create bitmap from SVG

                svgurl = Highcharts.svgToDataUrl(svg);
                finallyHandler = function() {
                    try {
                        domurl.revokeObjectURL(svgurl);
                    } catch (e) {
                        // Ignore
                    }
                };
                // First, try to get PNG by rendering on canvas
                Highcharts.imageToDataUrl(
                    svgurl,
                    imageType, { /* args */ },
                    scale,
                    function(imageURL) {
                        // Success
                        try {
                            Highcharts.downloadURL(imageURL, filename);
                            if (successCallback) {
                                successCallback();
                            }
                        } catch (e) {
                            failCallback();
                        }
                    },
                    function() {
                        // Failed due to tainted canvas
                        // Create new and untainted canvas
                        var canvas = doc.createElement('canvas'),
                            ctx = canvas.getContext('2d'),
                            imageWidth = svg.match(
                                /^<svg[^>]*width\s*=\s*\"?(\d+)\"?[^>]*>/
                            )[1] * scale,
                            imageHeight = svg.match(
                                /^<svg[^>]*height\s*=\s*\"?(\d+)\"?[^>]*>/
                            )[1] * scale,
                            downloadWithCanVG = function() {
                                ctx.drawSvg(svg, 0, 0, imageWidth, imageHeight);
                                try {
                                    Highcharts.downloadURL(
                                        nav.msSaveOrOpenBlob ?
                                        canvas.msToBlob() :
                                        canvas.toDataURL(imageType),
                                        filename
                                    );
                                    if (successCallback) {
                                        successCallback();
                                    }
                                } catch (e) {
                                    failCallback();
                                } finally {
                                    finallyHandler();
                                }
                            };

                        canvas.width = imageWidth;
                        canvas.height = imageHeight;
                        if (win.canvg) {
                            // Use preloaded canvg
                            downloadWithCanVG();
                        } else {
                            // Must load canVG first. // Don't destroy the object URL
                            // yet since we are doing things asynchronously. A cleaner
                            // solution would be nice, but this will do for now.
                            objectURLRevoke = true;
                            // Get RGBColor.js first, then canvg
                            getScript(libURL + 'rgbcolor.js', function() {
                                getScript(libURL + 'canvg.js', function() {
                                    downloadWithCanVG();
                                });
                            });
                        }
                    },
                    // No canvas support
                    failCallback,
                    // Failed to load image
                    failCallback,
                    // Finally
                    function() {
                        if (objectURLRevoke) {
                            finallyHandler();
                        }
                    }
                );
            }
        };

        // Get SVG of chart prepared for client side export. This converts embedded
        // images in the SVG to data URIs. The options and chartOptions arguments are
        // passed to the getSVGForExport function.
        Highcharts.Chart.prototype.getSVGForLocalExport = function(
            options,
            chartOptions,
            failCallback,
            successCallback
        ) {
            var chart = this,
                images,
                imagesEmbedded = 0,
                chartCopyContainer,
                chartCopyOptions,
                el,
                i,
                l,
                // After grabbing the SVG of the chart's copy container we need to do
                // sanitation on the SVG
                sanitize = function(svg) {
                    return chart.sanitizeSVG(svg, chartCopyOptions);
                },
                // Success handler, we converted image to base64!
                embeddedSuccess = function(imageURL, imageType, callbackArgs) {
                    ++imagesEmbedded;

                    // Change image href in chart copy
                    callbackArgs.imageElement.setAttributeNS(
                        'http://www.w3.org/1999/xlink',
                        'href',
                        imageURL
                    );

                    // When done with last image we have our SVG
                    if (imagesEmbedded === images.length) {
                        successCallback(sanitize(chartCopyContainer.innerHTML));
                    }
                };

            // Hook into getSVG to get a copy of the chart copy's container
            Highcharts.wrap(
                Highcharts.Chart.prototype,
                'getChartHTML',
                function(proceed) {
                    var ret = proceed.apply(
                        this,
                        Array.prototype.slice.call(arguments, 1)
                    );
                    chartCopyOptions = this.options;
                    chartCopyContainer = this.container.cloneNode(true);
                    return ret;
                }
            );

            // Trigger hook to get chart copy
            chart.getSVGForExport(options, chartOptions);
            images = chartCopyContainer.getElementsByTagName('image');

            try {
                // If there are no images to embed, the SVG is okay now.
                if (!images.length) {
                    // Use SVG of chart copy
                    successCallback(sanitize(chartCopyContainer.innerHTML));
                    return;
                }

                // Go through the images we want to embed
                for (i = 0, l = images.length; i < l; ++i) {
                    el = images[i];
                    Highcharts.imageToDataUrl(el.getAttributeNS(
                            'http://www.w3.org/1999/xlink',
                            'href'
                        ), 'image/png', {
                            imageElement: el
                        }, options.scale,
                        embeddedSuccess,
                        // Tainted canvas
                        failCallback,
                        // No canvas support
                        failCallback,
                        // Failed to load source
                        failCallback
                    );
                }
            } catch (e) {
                failCallback();
            }
        };

        /**
         * Exporting and offline-exporting modules required. Export a chart to an image
         * locally in the user's browser.
         *
         * @param  {Object} exportingOptions
         *         Exporting options, the same as in {@link
         *         Highcharts.Chart#exportChart}.
         * @param  {Options} chartOptions
         *         Additional chart options for the exported chart. For example a
         *         different background color can be added here, or `dataLabels`
         *         for export only.
         */
        Highcharts.Chart.prototype.exportChartLocal = function(
            exportingOptions,
            chartOptions
        ) {
            var chart = this,
                options = Highcharts.merge(chart.options.exporting, exportingOptions),
                fallbackToExportServer = function() {
                    if (options.fallbackToExportServer === false) {
                        if (options.error) {
                            options.error(options);
                        } else {
                            throw 'Fallback to export server disabled';
                        }
                    } else {
                        chart.exportChart(options);
                    }
                },
                svgSuccess = function(svg) {
                    // If SVG contains foreignObjects all exports except SVG will fail,
                    // as both CanVG and svg2pdf choke on this. Gracefully fall back.
                    if (
                        svg.indexOf('<foreignObject') > -1 &&
                        options.type !== 'image/svg+xml'
                    ) {
                        fallbackToExportServer();
                    } else {
                        Highcharts.downloadSVGLocal(
                            svg,
                            options,
                            fallbackToExportServer
                        );
                    }
                };

            // If we are on IE and in styled mode, add a whitelist to the renderer for
            // inline styles that we want to pass through. There are so many styles by
            // default in IE that we don't want to blacklist them all.


            // Always fall back on:
            // - MS browsers: Embedded images JPEG/PNG, or any PDF
            // - Embedded images and PDF
            if (
                (
                    isMSBrowser &&
                    (
                        options.type === 'application/pdf' ||
                        chart.container.getElementsByTagName('image').length &&
                        options.type !== 'image/svg+xml'
                    )
                ) || (
                    options.type === 'application/pdf' &&
                    chart.container.getElementsByTagName('image').length
                )
            ) {
                fallbackToExportServer();
                return;
            }

            chart.getSVGForLocalExport(
                options,
                chartOptions,
                fallbackToExportServer,
                svgSuccess
            );
        };

        // Extend the default options to use the local exporter logic
        merge(true, Highcharts.getOptions().exporting, {
            libURL: 'https://code.highcharts.com/6.0.3/lib/',

            // When offline-exporting is loaded, redefine the menu item definitions
            // related to download.
            menuItemDefinitions: {
                downloadPNG: {
                    textKey: 'downloadPNG',
                    onclick: function() {
                        this.exportChartLocal();
                    }
                },
                downloadJPEG: {
                    textKey: 'downloadJPEG',
                    onclick: function() {
                        this.exportChartLocal({
                            type: 'image/jpeg'
                        });
                    }
                },
                downloadSVG: {
                    textKey: 'downloadSVG',
                    onclick: function() {
                        this.exportChartLocal({
                            type: 'image/svg+xml'
                        });
                    }
                },
                downloadPDF: {
                    textKey: 'downloadPDF',
                    onclick: function() {
                        this.exportChartLocal({
                            type: 'application/pdf'
                        });
                    }
                }

            }
        });

    }(Highcharts));
}));
