import wx, wx.stc
import sys,math,os

from util import profile

class GcodeTextArea(wx.stc.StyledTextCtrl):
	def __init__(self, parent):
		super(GcodeTextArea, self).__init__(parent)

		self.SetLexer(wx.stc.STC_LEX_CONTAINER)
		self.Bind(wx.stc.EVT_STC_STYLENEEDED, self.OnStyle)
	
		fontSize = wx.SystemSettings.GetFont(wx.SYS_ANSI_VAR_FONT).GetPointSize()
		fontName = wx.Font(wx.SystemSettings.GetFont(wx.SYS_ANSI_VAR_FONT).GetPointSize(), wx.FONTFAMILY_MODERN, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL).GetFaceName()
		self.SetStyleBits(5)
		self.StyleSetSpec(0, "face:%s,size:%d" % (fontName, fontSize))
		self.StyleSetSpec(1, "fore:#006000,face:%s,size:%d" % (fontName, fontSize))
		self.IndicatorSetStyle(0, wx.stc.STC_INDIC_TT)
		self.IndicatorSetForeground(0, "#0000FF")
		self.IndicatorSetStyle(1, wx.stc.STC_INDIC_SQUIGGLE)
		self.IndicatorSetForeground(1, "#FF0000")
		self.SetWrapMode(wx.stc.STC_WRAP_NONE)
		self.SetScrollWidth(1000)
		if sys.platform == 'darwin':
			self.Bind(wx.EVT_KEY_DOWN, self.OnMacKeyDown)
	
		#GCodes and MCodes as supported by Marlin
		#GCode 21 is not really supported by Marlin, but we still do not report it as error as it's often used.
		self.supportedGCodes = [0,1,2,3,4,21,28,90,91,92]
		self.supportedMCodes = [17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,42,80,81,82,83,84,85,92,104,105,106,107,109,114,115,117,119,140,190,201,202,203,204,205,206,220,221,240,301,302,303,400,500,501,502,503,999]
	
	def OnMacKeyDown(self, e):
		code = e.GetKeyCode();
		stopPropagation = True
		#Command
		if e.CmdDown():
			if code == wx._core.WXK_LEFT:
				self.GotoLine(self.GetCurrentLine())
			elif code == wx._core.WXK_RIGHT:
				self.GotoPos(self.GetLineEndPosition(self.GetCurrentLine()))
			elif code == wx._core.WXK_UP:
				self.GotoPos(0)
			elif code == wx._core.WXK_DOWN:
				self.GotoPos(self.GetLength())
			else:
				stopPropagation = False
		# Control
		elif e.GetModifiers() & 0xF0:
			if code == 65: # A
				self.GotoLine(self.GetCurrentLine())
			elif code == 69: # E
				self.GotoPos(self.GetLineEndPosition(self.GetCurrentLine()))
			else:
				stopPropagation = False
		else:
			stopPropagation = False
		# Event propagation
		if stopPropagation:
			e.StopPropagation()
		else:
			e.Skip()
	
	def OnStyle(self, e):
		lineNr = self.LineFromPosition(self.GetEndStyled())
		while self.PositionFromLine(lineNr) > -1:
			line = self.GetLine(lineNr)
			start = self.PositionFromLine(lineNr)
			length = self.LineLength(lineNr)
			self.StartStyling(start, 255)
			self.SetStyling(length, 0)
			if ';' in line:
				pos = line.index(';')
				self.StartStyling(start + pos, 31)
				self.SetStyling(length - pos, 1)
				length = pos
		
			pos = 0
			while pos < length:
				if line[pos] in " \t\n\r":
					while pos < length and line[pos] in " \t\n\r":
						pos += 1
				else:
					end = pos
					while end < length and not line[end] in " \t\n\r":
						end += 1
					if self.checkGCodePart(line[pos:end], start + pos):
						self.StartStyling(start + pos, 0x20)
						self.SetStyling(end - pos, 0x20)
					pos = end
			lineNr += 1

	def checkGCodePart(self, part, pos):
		if len(part) < 2:
			self.StartStyling(pos, 0x40)
			self.SetStyling(1, 0x40)
			return True
		if not part[0] in "GMXYZFESTBPIDCJ":
			self.StartStyling(pos, 0x40)
			self.SetStyling(1, 0x40)
			return True
		if part[1] == '{':
			if part[-1] != '}':
				return True
			tag = part[2:-1]
			if not profile.isProfileSetting(tag) and not profile.isPreference(tag):
				self.StartStyling(pos + 2, 0x40)
				self.SetStyling(len(tag), 0x40)
				return True
		elif part[0] in "GM":
			try:
				code = int(part[1:])
			except (ValueError):
				self.StartStyling(pos + 1, 0x40)
				self.SetStyling(len(part) - 1, 0x40)
				return True
			if part[0] == 'G':
				if not code in self.supportedGCodes:
					return True
			if part[0] == 'M':
				if not code in self.supportedMCodes:
					return True
		else:
			try:
				float(part[1:])
			except (ValueError):
				self.StartStyling(pos + 1, 0x40)
				self.SetStyling(len(part) - 1, 0x40)
				return True
		return False

	def GetValue(self):
		return self.GetText()

	def SetValue(self, s):
		self.SetText(s)

