Make the check of rectangle being completely inside another rectangle tolerable to small precision mistakes

DEVSIX-2474

Author: yulian-gaponenko

io/src/main/java/com/itextpdf/io/LogMessageConstant.java

@@ -140,6 +140,7 @@ public final class LogMessageConstant {
     public static final String PROPERTY_IN_PERCENTS_NOT_SUPPORTED = "Property {0} in percents is not supported";
     public static final String RECTANGLE_HAS_NEGATIVE_OR_ZERO_SIZES = "The {0} rectangle has negative or zero sizes. It will not be displayed.";
     public static final String RECTANGLE_HAS_NEGATIVE_SIZE = "The {0} rectangle has negative size. It will not be displayed.";
+    public static final String REDACTION_OF_ANNOTATION_TYPE_WATERMARK_IS_NOT_SUPPORTED = "Redaction of annotation subtype /Watermark is not supported";
     public static final String REMOVING_PAGE_HAS_ALREADY_BEEN_FLUSHED = "The removing page has already been flushed.";
     public static final String RENDERER_WAS_NOT_ABLE_TO_PROCESS_KEEP_WITH_NEXT = "The renderer was not able to process keep with next property properly";
     public static final String ROLE_MAPPING_FROM_SOURCE_IS_NOT_COPIED_ALREADY_EXIST = "Role mapping \"{0}\" from source document is not copied. Destination document already has \"{1}\" mapping.";

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

@@ -160,10 +160,11 @@ public Rectangle getIntersection(Rectangle rect) {
     }
 
     /**
-     * Check if this rectangle contains the passed rectangle
-     * A rectangle will envelop itself
+     * Check if this rectangle contains the passed rectangle.
+     * A rectangle will envelop itself, meaning that for any rectangle {@code rect}
+     * the expression {@code rect.contains(rect)} always returns true.
      *
-     * @param rect
+     * @param rect a rectangle which is to be checked if it is fully contained inside this rectangle.
      * @return true if this rectangle contains the passed rectangle, false otherwise.
      */
     public boolean contains(Rectangle rect) {
@@ -177,8 +178,8 @@ public boolean contains(Rectangle rect) {
         float rurx = rllx + rect.getWidth();
         float rury = rlly + rect.getHeight();
 
-        return llx <= rllx && lly <= rlly
-                && rurx <= urx && rury <= ury;
+        return llx - EPS <= rllx && lly - EPS <= rlly
+                && rurx <= urx + EPS && rury <= ury + EPS;
     }
 
     /**