Add markers support

DEVSIX-2860

Author: ar3em

kernel/src/main/java/com/itextpdf/kernel/geom/Rectangle.java

@@ -185,6 +185,16 @@ public static Rectangle calculateBBox(List<Point> points) {
         return new Rectangle((float) left, (float) bottom, (float) (right - left), (float) (top - bottom));
     }
 
+    /**
+     * Convert rectangle to an array of points
+     *
+     * @return array of four extreme points of rectangle
+     */
+    public Point[] toPointsArray() {
+        return new Point[] {new Point(x, y), new Point(x + width, y),
+                new Point(x + width, y + height), new Point(x, y + height)};
+    }
+
     /**
      * Get the rectangle representation of the intersection between this rectangle and the passed rectangle
      *

layout/src/main/java/com/itextpdf/layout/renderer/AbstractRenderer.java

@@ -2002,24 +2002,11 @@ protected Rectangle calculateAbsolutePdfBBox() {
      * @return array of float values which denote left, bottom, right, top lines of bbox in this specific order
      */
     protected Rectangle calculateBBox(List<Point> points) {
-        double minX = Double.MAX_VALUE;
-        double minY = Double.MAX_VALUE;
-        double maxX = -Double.MAX_VALUE;
-        double maxY = -Double.MAX_VALUE;
-        for (Point p : points) {
-            minX = Math.min(p.getX(), minX);
-            minY = Math.min(p.getY(), minY);
-            maxX = Math.max(p.getX(), maxX);
-            maxY = Math.max(p.getY(), maxY);
-        }
-        return new Rectangle((float) minX, (float) minY, (float) (maxX - minX), (float) (maxY - minY));
+        return Rectangle.calculateBBox(points);
     }
 
     protected List<Point> rectangleToPointsList(Rectangle rect) {
-        List<Point> points = new ArrayList<>();
-        points.addAll(Arrays.asList(new Point(rect.getLeft(), rect.getBottom()), new Point(rect.getRight(), rect.getBottom()),
-                new Point(rect.getRight(), rect.getTop()), new Point(rect.getLeft(), rect.getTop())));
-        return points;
+        return Arrays.asList(rect.toPointsArray());
     }
 
     protected List<Point> transformPoints(List<Point> points, AffineTransform transform) {

styled-xml-parser/src/main/java/com/itextpdf/styledxmlparser/LogMessageConstant.java

@@ -57,6 +57,7 @@ public final class LogMessageConstant {
     public static final String ERROR_PARSING_CSS_SELECTOR = "Error while parsing css selector: {0}";
     /** The Constant UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED. */
     public static final String UNKNOWN_ABSOLUTE_METRIC_LENGTH_PARSED = "Unknown absolute metric length parsed \"{0}\".";
+    public static final String UNKNOWN_METRIC_ANGLE_PARSED = "Unknown metric angle parsed: \"{0}\".";
     public static final String URL_IS_EMPTY_IN_CSS_EXPRESSION = "url function is empty in expression:{0}";
     public static final String URL_IS_NOT_CLOSED_IN_CSS_EXPRESSION = "url function is not properly closed in expression:{0}";
     /** The Constant QUOTES_PROPERTY_INVALID. */

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

@@ -488,6 +488,11 @@ public class CommonCssConstants {
      */
     public static final String OVERFLOW_WRAP = "overflow-wrap";
 
+    /**
+     * The Constant OVERFLOW.
+     */
+    public static final String OVERFLOW = "overflow";
+
     /**
      * The Constant PADDING.
      */
@@ -741,8 +746,11 @@ public class CommonCssConstants {
     public static final String DECIMAL_LEADING_ZERO = "decimal-leading-zero";
 
     /**
-     * The Constant DISC.
+     * The Constant DEG.
      */
+    public static final String DEG = "deg";
+
+    /** The Constant DISC. */
     public static final String DISC = "disc";
 
     /**
@@ -765,9 +773,10 @@ public class CommonCssConstants {
      */
     public static final String GEORGIAN = "georgian";
 
-    /**
-     * The Constant GROOVE.
-     */
+    /** The Constant GRAD. */
+    public static final String GRAD = "grad";
+
+    /** The Constant GROOVE. */
     public static final String GROOVE = "groove";
 
     /**
@@ -940,6 +949,11 @@ public class CommonCssConstants {
      */
     public static final String PADDING_BOX = "padding-box";
 
+    /**
+     * The Constant RAD.
+     */
+    public static final String RAD = "rad";
+
     /**
      * The Constant REPEAT.
      */
@@ -1175,6 +1189,12 @@ public class CommonCssConstants {
      */
     public static final Map<String, String> FONT_ABSOLUTE_SIZE_KEYWORDS_VALUES;
 
+    /**
+     * The Constant METRIC_MEASUREMENTS.
+     */
+    public static final String[] METRIC_MEASUREMENTS_VALUES = new String[] {CommonCssConstants.PX, CommonCssConstants.IN,
+            CommonCssConstants.CM, CommonCssConstants.MM, CommonCssConstants.PC, CommonCssConstants.PT, CommonCssConstants.Q};
+
     // pseudo-classes
 
     /**