Specify max length instead of splicing

sebastinas · sebastinas · commit ad65967de3b8 · 2021-01-24T15:10:12.000+01:00
diff --git a/bpython/curtsiesfrontend/repl.py b/bpython/curtsiesfrontend/repl.py
@@ -1573,7 +1573,7 @@ def move_screen_up(current_line_start_row):
         if self.stdin.has_focus:
             cursor_row, cursor_column = divmod(
                 wcswidth(self.current_stdouterr_line)
-                + wcswidth(self.stdin.current_line[: self.stdin.cursor_offset]),
+                + wcswidth(self.stdin.current_line, self.stdin.cursor_offset),
                 width,
             )
             assert cursor_row >= 0 and cursor_column >= 0, (cursor_row, cursor_column)
@@ -1597,7 +1597,7 @@ def move_screen_up(current_line_start_row):
                 (
                     wcswidth(self.current_cursor_line_without_suggestion.s)
                     - wcswidth(self.current_line)
-                    + wcswidth(self.current_line[: self.cursor_offset])
+                    + wcswidth(self.current_line, self.cursor_offset)
                 )
                 + self.number_of_padding_chars_on_current_cursor_line(),
                 width,

Original file line number	Diff line number	Diff line change
`@@ -1573,7 +1573,7 @@ def move_screen_up(current_line_start_row):`
`1573`	`1573`	`if self.stdin.has_focus:`
`1574`	`1574`	`cursor_row, cursor_column = divmod(`
`1575`	`1575`	`wcswidth(self.current_stdouterr_line)`
`1576`		`- + wcswidth(self.stdin.current_line[: self.stdin.cursor_offset]),`
	`1576`	`+ + wcswidth(self.stdin.current_line, self.stdin.cursor_offset),`
`1577`	`1577`	`width,`
`1578`	`1578`	`)`
`1579`	`1579`	`assert cursor_row >= 0 and cursor_column >= 0, (cursor_row, cursor_column)`
`@@ -1597,7 +1597,7 @@ def move_screen_up(current_line_start_row):`
`1597`	`1597`	`(`
`1598`	`1598`	`wcswidth(self.current_cursor_line_without_suggestion.s)`
`1599`	`1599`	`- wcswidth(self.current_line)`
`1600`		`- + wcswidth(self.current_line[: self.cursor_offset])`
	`1600`	`+ + wcswidth(self.current_line, self.cursor_offset)`
`1601`	`1601`	`)`
`1602`	`1602`	`+ self.number_of_padding_chars_on_current_cursor_line(),`
`1603`	`1603`	`width,`