Add ignore_case option to String pattern

README.rst

@@ -59,13 +59,20 @@ If multiple ``Match`` objects are found at the same position, only the longer on
 
 String Patterns
 ---------------
-String patterns are based on `str.find`_ method to find matches, but returns all matches in the string.
+String patterns are based on `str.find`_ method to find matches, but returns all matches in the string. ``ignore_case``
+can be enabled to ignore case.
 
 .. code-block:: python
 
     >>> Rebulk().string('la').matches("lalalilala")
     [<la:(0, 2)>, <la:(2, 4)>, <la:(6, 8)>, <la:(8, 10)>]
 
+    >>> Rebulk().string('la').matches("LalAlilAla")
+    [<la:(8, 10)>]
+
+    >>> Rebulk().string('la', ignore_case=True).matches("LalAlilAla")
+    [<La:(0, 2)>, <lA:(2, 4)>, <lA:(6, 8)>, <la:(8, 10)>]
+
 You can define several patterns with a single ``string`` method call.
 
 .. code-block:: python

rebulk/test/test_pattern.py

@@ -26,6 +26,19 @@ def test_single(self):
         assert matches[0].span == (28, 34)
         assert matches[0].value == "Celtic"
 
+    def test_ignore_case(self):
+        pattern = StringPattern("celtic", label="test", ignore_case=False)
+
+        matches = list(pattern.matches(self.input_string))
+        assert len(matches) == 0
+
+        pattern = StringPattern("celtic", label="test", ignore_case=True)
+
+        matches = list(pattern.matches(self.input_string))
+        assert len(matches) == 1
+        assert matches[0].value == "Celtic"
+
+
     def test_no_match(self):
         pattern = StringPattern("Python")
 

rebulk/utils.py

@@ -6,7 +6,7 @@
 from types import GeneratorType
 
 
-def find_all(string, sub, start=None, end=None):
+def find_all(string, sub, start=None, end=None, ignore_case=False):
     """
     Return all indices in string s where substring sub is
     found, such that sub is contained in the slice s[start:end].
@@ -39,6 +39,9 @@ def find_all(string, sub, start=None, end=None):
     :return: all indices in the input string
     :rtype: __generator[str]
     """
+    if ignore_case:
+        sub = sub.lower()
+        string = string.lower()
     while True:
         start = string.find(sub, start, end)
         if start == -1: