initial commit

2021-07-10 16:25:16 +02:00
parent bff57cbf45
commit 20fb7267a8
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+/* *
+ * Mixin for downloading content in the browser
+ *
+ * (c) 2015-2019 Oystein Moseng
+ *
+ * License: www.highcharts.com/license
+ */
+
+'use strict';
+
+import Highcharts from '../parts/Globals.js';
+
+var win = Highcharts.win,
+    nav = win.navigator,
+    doc = win.document,
+    domurl = win.URL || win.webkitURL || win,
+    isEdgeBrowser = /Edge\/\d+/.test(nav.userAgent);
+
+// Convert base64 dataURL to Blob if supported, otherwise returns undefined
+Highcharts.dataURLtoBlob = function (dataURL) {
+    var parts = dataURL.match(/data:([^;]*)(;base64)?,([0-9A-Za-z+/]+)/);
+
+    if (
+        parts &&
+        parts.length > 3 &&
+        win.atob &&
+        win.ArrayBuffer &&
+        win.Uint8Array &&
+        win.Blob &&
+        domurl.createObjectURL
+    ) {
+        // Try to convert data URL to Blob
+        var binStr = win.atob(parts[3]),
+            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 a data URL in the browser. Can also take a blob as first param.
+ *
+ * @private
+ * @function Highcharts.downloadURL
+ *
+ * @param {string|object} dataURL
+ *        The dataURL/Blob to download
+ *
+ * @param {string} filename
+ *        The name of the resulting file (w/extension)
+ */
+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 new Error('Failed to convert to blob');
+        }
+    }
+
+    // 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 new Error('Failed to open window');
+            }
+        } catch (e) {
+            // window.open failed, trying location.href
+            win.location.href = dataURL;
+        }
+    }
+};