Support exponent notation for numbers with capital E for SVG parsing

DEVSIX-6645

Author: yulian-gaponenko

styled-xml-parser/src/main/java/com/itextpdf/styledxmlparser/css/util/CssDimensionParsingUtils.java

@@ -441,7 +441,7 @@ private static boolean isDigit(char ch) {
     }
 
     private static boolean isExponentNotation(String s, int index) {
-        return index < s.length() && s.charAt(index) == 'e' &&
+        return index < s.length() && Character.toLowerCase(s.charAt(index)) == 'e' &&
                 // e.g. 12e5
                 (index + 1 < s.length() && isDigit(s.charAt(index + 1)) ||
                         // e.g. 12e-5, 12e+5

styled-xml-parser/src/test/java/com/itextpdf/styledxmlparser/css/util/CssDimensionParsingUtilsTest.java

@@ -166,7 +166,7 @@ public void parseAbsoluteLengthFromNull() {
     }
 
     @Test
-    public void parseAboluteLengthExponential01() {
+    public void parseAbsoluteLengthExponentialPtTest() {
         String value = "1e2pt";
         float actual = CssDimensionParsingUtils.parseAbsoluteLength(value);
         float expected = 1e2f;
@@ -175,14 +175,23 @@ public void parseAboluteLengthExponential01() {
     }
 
     @Test
-    public void parseAboluteLengthExponential02() {
+    public void parseAbsoluteLengthExponentialPxTest() {
         String value = "1e2px";
         float actual = CssDimensionParsingUtils.parseAbsoluteLength(value);
         float expected = 1e2f * 0.75f;
 
         Assert.assertEquals(expected, actual, 0);
     }
 
+    @Test
+    public void parseAbsoluteLengthExponentialCapitalTest() {
+        String value = "1E-4";
+        float actual = CssDimensionParsingUtils.parseAbsoluteLength(value);
+        float expected = 1e-4f * 0.75f;
+
+        Assert.assertEquals(expected, actual, 1e-9);
+    }
+
     @Test
     public void parseAbsoluteLength12cmTest() {
         // Calculations in CssUtils#parseAbsoluteLength were changed to work