Navigate chunkwise in the diff view

core/commands/diff.py

@@ -15,7 +15,7 @@
 from . import intra_line_colorizer
 from . import stage_hunk
 from .navigate import GsNavigate
-from ..fns import head, filter_, flatten, pairwise, unique
+from ..fns import head, filter_, flatten, unique
 from ..parse_diff import SplittedDiff
 from ..git_command import GitCommand
 from ..runtime import ensure_on_ui, enqueue_on_worker
@@ -1017,19 +1017,23 @@ class gs_diff_navigate(GsNavigate):
 
     offset = 0
     log_position = True
+    shrink_to_cursor = False
 
     def get_available_regions(self):
-        return [
-            sublime.Region(a.a, b.a - 1)
-            for a, b in pairwise(
-                chain(
-                    self.view.find_by_selector(
-                        "meta.diff.range.unified, meta.commit-info.header"
-                    ),
-                    [sublime.Region(self.view.size())]
-                )
-            )
-        ]
+        def _gen():
+            # type: () -> Iterator[sublime.Region]
+            diff = SplittedDiff.from_view(self.view)
+            for hunk in diff.hunks:
+                yield sublime.Region(hunk.region().a)
+                chunks = list(chunkby(hunk.content().lines(), lambda line: not line.is_context()))
+                if len(chunks) > 1:
+                    for chunk in chunks:
+                        yield sublime.Region(chunk[0].region().a, chunk[-1].region().b)
+
+        return sorted(
+            list(_gen())
+            + self.view.find_by_selector("meta.commit-info.header")
+        )
 
 
 class gs_diff_undo(TextCommand, GitCommand):

core/commands/navigate.py

@@ -20,6 +20,7 @@ class GsNavigate(TextCommand, GitCommand):
     show_at_center = False
     wrap = True
     wrap_with_force = False
+    shrink_to_cursor = True
     log_position = False
     # For the first entry, try to show the beginning of the buffer.
     # (Usually we have some info/help text there.)
@@ -53,9 +54,11 @@ def run(self, edit, forward=True):
 
         self._just_jumped = 2
         sel.clear()
-        # Position the cursor at the beginning of the section...
-        new_cursor_position = wanted_section.begin() + self.offset
-        sel.add(sublime.Region(new_cursor_position))
+        if self.shrink_to_cursor or self.offset:
+            new_cursor_position = sublime.Region(wanted_section.begin() + self.offset)
+        else:
+            new_cursor_position = sublime.Region(wanted_section.b, wanted_section.a)
+        sel.add(new_cursor_position)
 
         if self.show_at_center:
             self.view.show_at_center(new_cursor_position)