from fide import *

global ctx
ctx = GlobalContext()

# def cursor_go_left():
def go_left():
    buf = ctx.current_buffer
    cursor = ctx.current_buffer.cursor
    if cursor.col == 0:
        if cursor.line_num > 0:
            cursor.col = buf.lines[cursor.line_num-1].length
            cursor.want_col = cursor.col
            cursor.line_num -= 1
    else:
        cursor.col = max(0, cursor.col - 1)
        cursor.want_col = cursor.col