fix bug when vim option 'selection' is 'exclusive' (#883)

here is a vim option ``selection``.
if the value is `exclusive`, the mark `'>` is one more then real visual selection.
so var `ebyte` or `ec` must subtract 1.

and that is not a windows bug.
because gvim on windows sourced `$VIMRUNTIME\mswin.vim` by default.
the line 17 of `mswin.vim` execute `:behave mswin` will change option `selection` to `exclusive`.

more deailt in issue #863

pythonx/UltiSnips/text_objects/_visual.py

@@ -42,11 +42,7 @@ class Visual(NoneditableTextObject, TextObjectTransformation):
 
     def _update(self, done):
         if self._mode == 'v':  # Normal selection.
-            # Remove last character when selection mode is 'exclusive'
-            if _vim.eval('&selection') == 'exclusive':
-                text = self._text[:-1]
-            else:
-                text = self._text
+            text = self._text
         else:  # Block selection or line selection.
             text_before = _vim.buf[self.start.line][:self.start.col]
             indent = _REPLACE_NON_WS.sub(' ', text_before)

pythonx/UltiSnips/vim_state.py

@@ -126,6 +126,12 @@ class VisualContentPreserver(object):
         ec = byte2col(el, ebyte - 1)
         self._mode = _vim.eval('visualmode()')
 
+        # When 'selection' is 'exclusive', the > mark is one column behind the
+        # actual content being copied, but never before the < mark.
+        if _vim.eval('&selection') == 'exclusive':
+            if not (sl == el and sbyte == ebyte):
+                ec -= 1
+
         _vim_line_with_eol = lambda ln: _vim.buf[ln] + '\n'
 
         if sl == el:

test/test_Visual.py

@@ -1,9 +1,6 @@
 from test.vim_test_case import VimTestCase as _VimTest
 from test.constant import *
 
-# ${VISUAL}  {{{#
-
-
 class Visual_NoVisualSelection_Ignore(_VimTest):
     snippets = ('test', 'h${VISUAL}b')
     keys = 'test' + EX + 'abc'
@@ -15,6 +12,18 @@ class Visual_SelectOneWord(_VimTest):
     keys = 'blablub' + ESC + '0v6l' + EX + 'test' + EX
     wanted = 'hblablubb'
 
+class Visual_SelectOneWordInclusive(_VimTest):
+    snippets = ('test', 'h${VISUAL}b', '', 'i')
+    keys = 'xxxyyyyxxx' + ESC + '4|vlll' + EX + 'test' + EX
+    wanted = 'xxxhyyyybxxx'
+
+class Visual_SelectOneWordExclusive(_VimTest):
+    snippets = ('test', 'h${VISUAL}b', '', 'i')
+    keys = 'xxxyyyyxxx' + ESC + '4|vlll' + EX + 'test' + EX
+    wanted = 'xxxhyyybyxxx'
+
+    def _extra_vim_config(self, vim_config):
+        vim_config.append('set selection=exclusive')
 
 class Visual_SelectOneWord_ProblemAfterTab(_VimTest):
     snippets = ('test', 'h${VISUAL}b', '', 'i')
@@ -200,5 +209,3 @@ class VisualTransformation_InDefaultText_LineSelect_Overwrite(_VimTest):
     keys = 'hello\nnice\nworld' + ESC + 'Vkk' + \
         EX + 'test' + EX + 'jup' + JF + 'hi'
     wanted = 'hjupbhi'
-
-# End: ${VISUAL}  #}}}