1 files changed, 80 insertions, 0 deletions
diff --git a/stanford_parser/standoff.py b/stanford_parser/standoff.py
new file mode 100644
index 0000000..76eef4d
--- /dev/null
+++ b/stanford_parser/standoff.py
@@ -0,0 +1,80 @@
+
+class TextStandoff:
+    def __init__(self, text, range):
+        self.entireText = text
+
+        self.range = range
+        
+    def asPrimitives(self):
+        return (self.entireText, self.range)
+    
+    @staticmethod
+    def fromPrimitives(args):
+        return TextStandoff(*args)
+        
+    def isNull(self):
+        return self.range == (0, 0)
+    
+    @property
+    def text(self):
+        start, end = self.range
+        return self.entireText[start:end]
+    @property
+    def length(self):
+        start, end = self.range
+        return end - start
+    @property
+    def end(self):
+        start, end = self.range
+        return end
+    @property
+    def start(self):
+        start, end = self.range
+        return start
+
+    def overlaps(self, standoff):
+        if self.start < standoff.end and standoff.start < self.end:
+            return True
+        else:
+            return False
+    def contains(self, standoff):
+        start, end = standoff
+        return self.start <= start and self.end >= end
+    def before(self, standoff):
+        if self.end <= standoff.start:
+            return True
+        else:
+            return False
+    def degreeOfOverlap(self, standoff):
+        """
+        Returns the size of the overlapping range of two tags. Returns
+        zero if they do not overlap.
+        """
+        start, end = standoff
+        if self.overlaps(standoff):
+            return min(end, self.end) - max(start, self.start)
+        else:
+            return 0
+
+    def __iter__(self):
+        return iter((self.start, self.end))
+    def toXml(self, standoff):
+        standoff.setAttribute("start", str(self.start))
+        standoff.setAttribute("end", str(self.end))
+
+    def __repr__(self):
+        return 'TextStandoff("%s", (%d, %d))' % (self.entireText, self.start, self.end)
+
+    def __str__(self):
+        return '("%s", (%d, %d))' % (self.text, self.start, self.end)
+
+    def __eq__(self, obj):
+        if isinstance(obj, TextStandoff):
+            if self.range == obj.range and self.entireText == obj.entireText:
+                return True
+        return False
+
+    def __hash__(self):
+        return hash(self.entireText) * 17 + hash(self.range)
+
+