from Custom import CustomBase
import API
import decimal

class round2 (CustomBase):
    stack = None
    
    def __init__(self, stack):
        self.stack = stack
    # __init__
    
    def help(self):
        msg =  "round\n"
        msg += "-----\n\n"
        msg += "Rounds r1 to r0 digits after the coma\n\n"
        msg += "Takes r0 and r1 from the stack\n\n"
        msg += "Rounds r1 away from zero\n\n"
        msg += "Pushes the result to r0"
        API.showPopup('Custom function', msg, font=('Courier',API.helpFontSize))
        # If you want to implement translated texts, you can use the API.t(textKey) function:
        # API.showPopup('Custom function', API.t(API.programName+'.CustomFunctions.square.btnHLP'), font=('Courier',API.helpFontSize))
    # help

    def calculate(self):
        if self.stack.inputMode != 'DEC':
            API.toast('This operation is only supported in DEC mode')
            # If you want to implement translated texts, you can use the API.t(textKey) function:
            # API.toast(API.t(API.programName+'.CustomFunctions.square.onlySupportedinDEC'))
            return
        if self.stack.finishEntry() == -1: 
            return # abort here because data in input line is invalid
        if self.stack.size() < 2:
            API.toast('This operation needs 2 arguments')
            return
        p = self.stack.getRegister(0)
        x = self.stack.getRegister(1)
        v = (10**p)*x
        v = v.to_integral_value(decimal.ROUND_HALF_UP)/(10**p)
        self.stack.pop(2)
        self.stack.push(v)
    # calculate
    
# round2