support user define map

plugin/textobj/argument.vim

@@ -16,14 +16,39 @@ if !exists('g:argument_right_bracket')
     let g:argument_right_bracket = '[])]'
 endif
 
+if !exists('g:argument_mapping_select_around')
+    let g:argument_mapping_select_around = 'aa'
+endif
+
+if !exists('g:argument_mapping_select_inside')
+    let g:argument_mapping_select_inside = 'ia'
+endif
+
+if !exists('g:argument_mapping_move_previous')
+    let g:argument_mapping_move_previous = '[a'
+endif
+
+if !exists('g:argument_mapping_move_start')
+    let g:argument_mapping_move_start = '[A'
+endif
+
+if !exists('g:argument_mapping_move_next')
+    let g:argument_mapping_move_next = ']a'
+endif
+
+if !exists('g:argument_mapping_move_end')
+    let g:argument_mapping_move_end = ']A'
+endif
+
+
 call textobj#user#plugin('argument', {
             \      '-': {
-            \        'select-a': 'aa', 'select-a-function': 'textobj#argument#select_a',
-            \        'select-i': 'ia', 'select-i-function': 'textobj#argument#select_i',
-            \        'move-n': ']a', 'move-n-function': 'textobj#argument#move_n',
-            \        'move-N': ']A', 'move-N-function': 'textobj#argument#move_N',
-            \        'move-p': '[a', 'move-p-function': 'textobj#argument#move_p',
-            \        'move-P': '[A', 'move-P-function': 'textobj#argument#move_P',
+            \        'select-a': g:argument_mapping_select_around, 'select-a-function': 'textobj#argument#select_a',
+            \        'select-i': g:argument_mapping_select_inside, 'select-i-function': 'textobj#argument#select_i',
+            \        'move-n': g:argument_mapping_move_next, 'move-n-function': 'textobj#argument#move_n',
+            \        'move-N': g:argument_mapping_move_end, 'move-N-function': 'textobj#argument#move_N',
+            \        'move-p': g:argument_mapping_move_previous, 'move-p-function': 'textobj#argument#move_p',
+            \        'move-P': g:argument_mapping_move_start, 'move-P-function': 'textobj#argument#move_P',
             \        'sfile': expand('<sfile>:p'),
             \      },
             \    })