Viz export: remove clear default namespaces (T1292204) (DevExpress#29907)

Author: anna-shakhova

packages/devextreme/js/__internal/core/utils/m_svg.ts

@@ -16,18 +16,10 @@ function getMarkup(element, backgroundColor) {
 }
 
 function fixNamespaces(markup) {
-  let first = true;
-
   if (markup.indexOf('xmlns:xlink') === -1) {
     markup = markup.replace('<svg', '<svg xmlns:xlink="http://www.w3.org/1999/xlink"');
   }
 
-  markup = markup.replace(/xmlns="[\s\S]*?"/gi, function (match) {
-    if (!first) return '';
-    first = false;
-    return match;
-  });
-
   return markup.replace(/xmlns:NS1="[\s\S]*?"/gi, '')
     .replace(/NS1:xmlns:xlink="([\s\S]*?)"/gi, 'xmlns:xlink="$1"');
 }

packages/devextreme/testing/tests/DevExpress.viz.renderers/SvgElement.tests.js

@@ -487,20 +487,21 @@ function checkDashStyle(assert, elem, result, style, value) {
 
     QUnit.module('SvgElement markup method');
 
-    QUnit.test('Returns correct namespaces (IE specific problem)', function(assert) {
-        function mapFromStr(str) {
-            const map = {};
-            str.split('>').forEach(function(s) {
-                s.split('<').forEach(function(s) {
-                    s.split(' ').forEach(function(s) {
-                        if(s) {
-                            map[s] = (map[s] || 0) + 1;
-                        }
-                    });
+    function mapFromStr(str) {
+        const map = {};
+        str.split('>').forEach(function(s) {
+            s.split('<').forEach(function(s) {
+                s.split(' ').forEach(function(s) {
+                    if(s) {
+                        map[s] = (map[s] || 0) + 1;
+                    }
                 });
             });
-            return map;
-        }
+        });
+        return map;
+    }
+
+    QUnit.test('Returns correct namespaces (IE specific problem)', function(assert) {
         // arrange
         const parent = { element: document.createElement('div') };
         const svg = (new rendererModule.SvgElement({}, 'svg')).append(parent);
@@ -521,6 +522,31 @@ function checkDashStyle(assert, elem, result, style, value) {
         assert.deepEqual(mapFromStr(markupString), mapFromStr('<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">Some content</svg>'));
     });
 
+    QUnit.test('Keep all default namespaces (T1292204)', function(assert) {
+        // arrange
+        const parent = { element: document.createElement('div') };
+        const svg = (new rendererModule.SvgElement({}, 'svg')).append(parent);
+        $('#qunit-fixture').append(parent);
+
+        svg.attr({
+            xmlns: 'http://www.w3.org/2000/svg',
+            'xmlns:xlink': 'http://www.w3.org/1999/xlink',
+            version: '1.1'
+        });
+
+        const foreignContent = document.createElement('table');
+        foreignContent.setAttribute('xmlns', 'http://www.w3.org/1999/xhtml');
+
+        svg.element.appendChild(foreignContent);
+
+        // act
+        const markupString = svg.markup();
+        const expectedMarkup = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1"><table xmlns="http://www.w3.org/1999/xhtml"></table></svg>';
+
+        // assert
+        assert.deepEqual(mapFromStr(markupString), mapFromStr(expectedMarkup));
+    });
+
     QUnit.test('Can return markup on detached element', function(assert) {
         // arrange
         const svg = (new rendererModule.SvgElement({}, 'svg'));