Add feature to jump directly to the commit that introduced the current line (#3)

Author: nh2

gitbrowse/browser.py

@@ -96,6 +96,27 @@ def _move_commit(self, method_name):
 
         self._update_mapping(start, finish)
 
+    def _jump_to_commit(self, sha):
+
+        start = self.file_history.current_commit.sha
+
+        if not self.file_history.jump_to_commit(sha):
+            curses.beep()
+            return
+
+        finish = sha
+
+        if start == finish:
+            curses.beep()
+            return
+
+        self._update_mapping(start, finish)
+
+    @ModalScrollingInterface.key_bindings('j')
+    def info(self, times=1):
+        blame_line = self.content()[self.highlight_line]
+        self._jump_to_commit(blame_line.sha)
+
     @ModalScrollingInterface.key_bindings(']')
     def next_commit(self, times=1):
         for i in range(0,times):

gitbrowse/git.py

@@ -87,6 +87,22 @@ def prev(self):
         self._blame = None
         return True
 
+    def jump_to_commit(self, sha):
+        """
+        Moves to the given commit SHA, returning False if it doesn't exist.
+        """
+        found_index = None
+        for i, commit in enumerate(self.commits):
+            if commit.sha == sha:
+                found_index = i
+
+        if found_index is None:
+            return False
+
+        self._index = found_index
+        self._blame = None
+        return True
+
     def blame(self):
         """
         Returns blame information for this file at the current commit as