#!/usr/bin/env python3
#
# Copyright (C) [2021] [Joseph Zakar], [observing@gmail.com]
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
"""
Given a closed path of straight lines, this program generates a paper model containing
tabs and score lines for each straight edge.
"""

import inkex
from inkex import Path, Color
from lxml import etree
import math
import copy
import inspect

class pathStruct(object):
    
    def __init__(self):
        self.id="path0000"
        self.path=[]
        self.enclosed=False
        
    def __str__(self):
        return self.path
    
class pnPoint(object):
    
   # This class came from https://github.com/JoJocoder/PNPOLY
    def __init__(self,p):
        self.p=p
        
    def __str__(self):
        return self.p
    
    def InPolygon(self,polygon,BoundCheck=False):
        inside=False
        if BoundCheck:
            minX=polygon[0][0]
            maxX=polygon[0][0]
            minY=polygon[0][1]
            maxY=polygon[0][1]
            for p in polygon:
                minX=min(p[0],minX)
                maxX=max(p[0],maxX)
                minY=min(p[1],minY)
                maxY=max(p[1],maxY)
            if self.p[0]<minX or self.p[0]>maxX or self.p[1]<minY or self.p[1]>maxY:
                return False
        j=len(polygon)-1
        for i in range(len(polygon)):
            if ((polygon[i][1]>self.p[1])!=(polygon[j][1]>self.p[1]) and (self.p[0]<(polygon[j][0]-polygon[i][0])*(self.p[1]-polygon[i][1])/( polygon[j][1] - polygon[i][1] ) + polygon[i][0])):
                    inside =not inside
            j=i
        return inside

class Tabgen(inkex.EffectExtension):
    
    def add_arguments(self, pars):
        pars.add_argument("--usermenu")
        pars.add_argument("--tabangle", type=float, default=45.0, help="Angle of tab edges in degrees")
        pars.add_argument("--tabheight", type=float, default=0.4, help="Height of tab in dimensional units")
        pars.add_argument("--dashlength", type=float, default=0.25, help="Length of dashline in dimentional units (zero for solid line)")
        pars.add_argument("--tabsets", default="both", help="Tab placement on polygons with cutouts")
        pars.add_argument("--unit", default="in", help="Dimensional units of selected paths")
        pars.add_argument("--strokewidth", type=float, default=1.0, help="Stroke width (px)")   
        pars.add_argument("--color_solid", type=Color, default='3419879935', help="Solid line color")
        pars.add_argument("--color_dash", type=Color, default='1592519679', help="Solid line dash")
        pars.add_argument("--print_debug", type=inkex.Boolean, default=True, help="Print debug info")
        pars.add_argument("--keep_original", type=inkex.Boolean, default=False, help="Keep original elements")

    #draw SVG line segment(s) between the given (raw) points
    def drawline(self, dstr, name, parent, sstr=None):
        line_style   = {'stroke':'#000000','stroke-width':'1','fill':'none'}
        if sstr == None:
            stylestr = str(inkex.Style(line_style))
        else:
            stylestr = sstr
        el = parent.add(inkex.PathElement())
        el.path = dstr
        el.style = sstr
        el.label = name

    def pathInsidePath(self, path, testpath):
        enclosed = True
        for tp in testpath:
            # If any point in the testpath is outside the path, it's not enclosed
            if self.insidePath(path, tp) == False:
                enclosed = False
                return enclosed # True if testpath is fully enclosed in path
        return enclosed
        
    def insidePath(self, path, p):
        point = pnPoint((p.x, p.y))
        pverts = []
        for pnum in path:
            pverts.append((pnum.x, pnum.y))
        isInside = point.InPolygon(pverts, True)
        return isInside # True if point p is inside path

    def makescore(self, pt1, pt2, dashlength):
        # Draws a dashed line of dashlength between two points
        # Dash = dashlength (in inches) space followed by dashlength mark
        # if dashlength is zero, we want a solid line
        apt1 = inkex.paths.Line(0.0,0.0)
        apt2 = inkex.paths.Line(0.0,0.0)
        ddash = ''
        if math.isclose(dashlength, 0.0):
            #inkex.utils.debug("Draw solid dashline")
            ddash = ' M '+str(pt1.x)+','+str(pt1.y)+' L '+str(pt2.x)+','+str(pt2.y)
        else:
            if math.isclose(pt1.y, pt2.y):
                #inkex.utils.debug("Draw horizontal dashline")
                if pt1.x < pt2.x:
                    xcushion = pt2.x - dashlength
                    xpt = pt1.x
                    ypt = pt1.y
                else:
                    xcushion = pt1.x - dashlength
                    xpt = pt2.x
                    ypt = pt2.y
                ddash = ''
                done = False
                while not(done):
                    if (xpt + dashlength*2) <= xcushion:
                        xpt = xpt + dashlength
                        ddash = ddash + ' M ' + str(xpt) + ',' + str(ypt)
                        xpt = xpt + dashlength
                        ddash = ddash + ' L ' + str(xpt) + ',' + str(ypt)
                    else:
                        done = True
            elif math.isclose(pt1.x, pt2.x):
                #inkex.utils.debug("Draw vertical dashline")
                if pt1.y < pt2.y:
                    ycushion = pt2.y - dashlength
                    xpt = pt1.x
                    ypt = pt1.y
                else:
                    ycushion = pt1.y - dashlength
                    xpt = pt2.x
                    ypt = pt2.y
                ddash = ''
                done = False
                while not(done):
                    if(ypt + dashlength*2) <= ycushion:
                        ypt = ypt + dashlength         
                        ddash = ddash + ' M ' + str(xpt) + ',' + str(ypt)
                        ypt = ypt + dashlength
                        ddash = ddash + ' L ' + str(xpt) + ',' + str(ypt)
                    else:
                        done = True
            else:
                #inkex.utils.debug("Draw sloping dashline")
                if pt1.y > pt2.y:
                    apt1.x = pt1.x
                    apt1.y = pt1.y
                    apt2.x = pt2.x
                    apt2.y = pt2.y
                else:
                    apt1.x = pt2.x
                    apt1.y = pt2.y
                    apt2.x = pt1.x
                    apt2.y = pt1.y
                m = (apt1.y-apt2.y)/(apt1.x-apt2.x)
                theta = math.atan(m)
                msign = (m>0) - (m<0)
                ycushion = apt2.y + dashlength*math.sin(theta)
                xcushion = apt2.x + msign*dashlength*math.cos(theta)
                ddash = ''
                xpt = apt1.x
                ypt = apt1.y
                done = False
                while not(done):
                    nypt = ypt - dashlength*2*math.sin(theta)
                    nxpt = xpt - msign*dashlength*2*math.cos(theta)
                    if (nypt >= ycushion) and (((m<0) and (nxpt <= xcushion)) or ((m>0) and (nxpt >= xcushion))):
                        # move to end of space / beginning of mark
                        xpt = xpt - msign*dashlength*math.cos(theta)
                        ypt = ypt - msign*dashlength*math.sin(theta)
                        ddash = ddash + ' M ' + str(xpt) + ',' + str(ypt)
                        # draw the mark
                        xpt = xpt - msign*dashlength*math.cos(theta)
                        ypt = ypt - msign*dashlength*math.sin(theta)
                        ddash = ddash + ' L ' + str(xpt) + ',' + str(ypt)
                    else:
                        done = True
        return ddash

    def detectIntersect(self, x1, y1, x2, y2, x3, y3, x4, y4):
        td = (x1-x2)*(y3-y4)-(y1-y2)*(x3-x4)
        if td == 0:
            # These line segments are parallel
            return False
        t = ((x1-x3)*(y3-y4)-(y1-y3)*(x3-x4))/td
        if (0.0 <= t) and (t <= 1.0):
            return True
        else:
            return False

    def makeTab(self, tpath, pt1, pt2, tabht, taba):
        # tpath - the pathstructure containing pt1 and pt2
        # pt1, pt2 - the two points where the tab will be inserted
        # tabht - the height of the tab
        # taba - the angle of the tab sides
        # returns the two tab points in order of closest to pt1
        tpt1 = inkex.paths.Line(0.0,0.0)
        tpt2 = inkex.paths.Line(0.0,0.0)
        currTabHt = tabht
        currTabAngle = taba
        testAngle = 1.0
        testHt = currTabHt * 0.01
        adjustTab = 0
        tabDone = False
        while not tabDone:
            # Let's find out the orientation of the tab
            if math.isclose(pt1.x, pt2.x):
                # It's vertical. Let's try the right side
                if pt1.y < pt2.y:
                    tpt1.x = pt1.x + testHt
                    tpt2.x = pt2.x + testHt
                    tpt1.y = pt1.y + testHt/math.tan(math.radians(testAngle))
                    tpt2.y = pt2.y - testHt/math.tan(math.radians(testAngle))
                    pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                    pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                    if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                       (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                        tpt1.x = pt1.x - currTabHt
                        tpt2.x = pt2.x - currTabHt
                    else:
                        tpt1.x = pt1.x + currTabHt
                        tpt2.x = pt2.x + currTabHt
                    tpt1.y = pt1.y + currTabHt/math.tan(math.radians(currTabAngle))
                    tpt2.y = pt2.y - currTabHt/math.tan(math.radians(currTabAngle))
                else: # pt2.y < pt1.y
                    tpt1.x = pt1.x + testHt
                    tpt2.x = pt2.x + testHt
                    tpt1.y = pt1.y - testHt/math.tan(math.radians(testAngle))
                    tpt2.y = pt2.y + testHt/math.tan(math.radians(testAngle))
                    pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                    pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                    if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                       (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                        tpt1.x = pt1.x - currTabHt
                        tpt2.x = pt2.x - currTabHt
                    else:
                        tpt1.x = pt1.x + currTabHt
                        tpt2.x = pt2.x + currTabHt
                    tpt1.y = pt1.y - currTabHt/math.tan(math.radians(currTabAngle))
                    tpt2.y = pt2.y + currTabHt/math.tan(math.radians(currTabAngle))
            elif math.isclose(pt1.y, pt2.y):
                # It's horizontal. Let's try the top
                if pt1.x < pt2.x:
                    tpt1.y = pt1.y - testHt
                    tpt2.y = pt2.y - testHt
                    tpt1.x = pt1.x + testHt/math.tan(math.radians(testAngle))
                    tpt2.x = pt2.x - testHt/math.tan(math.radians(testAngle))
                    pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                    pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                    if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                       (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                        tpt1.y = pt1.y + currTabHt
                        tpt2.y = pt2.y + currTabHt
                    else:
                        tpt1.y = pt1.y - currTabHt
                        tpt2.y = pt2.y - currTabHt
                    tpt1.x = pt1.x + currTabHt/math.tan(math.radians(currTabAngle))
                    tpt2.x = pt2.x - currTabHt/math.tan(math.radians(currTabAngle))
                else: # pt2.x < pt1.x
                    tpt1.y = pt1.y - testHt
                    tpt2.y = pt2.y - testHt
                    tpt1.x = pt1.x - testHt/math.tan(math.radians(testAngle))
                    tpt2.x = pt2.x + testHt/math.tan(math.radians(testAngle))
                    pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                    pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                    if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                       (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                        tpt1.y = pt1.y + currTabHt
                        tpt2.y = pt2.y + currTabHt
                    else:
                        tpt1.y = pt1.y - currTabHt
                        tpt2.y = pt2.y - currTabHt
                    tpt1.x = pt1.x - currTabHt/math.tan(math.radians(currTabAngle))
                    tpt2.x = pt2.x + currTabHt/math.tan(math.radians(currTabAngle))

            else: # the orientation is neither horizontal nor vertical
                # Let's get the slope of the line between the points
                # Because Inkscape's origin is in the upper-left corner,
                # a positive slope (/) will yield a negative value
                slope = (pt2.y - pt1.y)/(pt2.x - pt1.x)
                # Let's get the angle to the horizontal
                theta = math.degrees(math.atan(slope))
                # Let's construct a horizontal tab
                seglength = math.sqrt((pt1.x-pt2.x)**2 +(pt1.y-pt2.y)**2)
                if slope < 0.0:
                    if pt1.x < pt2.x:
                        tpt1.y = pt1.y - testHt
                        tpt2.y = pt2.y - testHt
                        tpt1.x = pt1.x + testHt/math.tan(math.radians(testAngle))
                        tpt2.x = pt2.x - testHt/math.tan(math.radians(testAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                        pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                        pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                        if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                           (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                            tpt1.y = pt1.y + currTabHt
                            tpt2.y = pt2.y + currTabHt
                        else:
                            tpt1.y = pt1.y - currTabHt
                            tpt2.y = pt2.y - currTabHt
                        tpt1.x = pt1.x + currTabHt/math.tan(math.radians(currTabAngle))
                        tpt2.x = pt2.x - currTabHt/math.tan(math.radians(currTabAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                    else: # pt1.x > pt2.x
                        tpt1.y = pt1.y - testHt
                        tpt2.y = pt2.y - testHt
                        tpt1.x = pt1.x - testHt/math.tan(math.radians(testAngle))
                        tpt2.x = pt2.x + testHt/math.tan(math.radians(testAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                        pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                        pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                        if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                           (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                            tpt1.y = pt1.y + currTabHt
                            tpt2.y = pt2.y + currTabHt
                        else:
                            tpt1.y = pt1.y - currTabHt
                            tpt2.y = pt2.y - currTabHt
                        tpt1.x = pt1.x - currTabHt/math.tan(math.radians(currTabAngle))
                        tpt2.x = pt2.x + currTabHt/math.tan(math.radians(currTabAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                else: # slope > 0.0
                    if pt1.x < pt2.x:
                        tpt1.y = pt1.y - testHt
                        tpt2.y = pt2.y - testHt
                        tpt1.x = pt1.x + testHt/math.tan(math.radians(testAngle))
                        tpt2.x = pt2.x - testHt/math.tan(math.radians(testAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                        pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                        pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                        if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                           (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                            tpt1.y = pt1.y + currTabHt
                            tpt2.y = pt2.y + currTabHt
                        else:
                            tpt1.y = pt1.y - currTabHt
                            tpt2.y = pt2.y - currTabHt
                        tpt1.x = pt1.x + currTabHt/math.tan(math.radians(currTabAngle))
                        tpt2.x = pt2.x - currTabHt/math.tan(math.radians(currTabAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                    else: # pt1.x > pt2.x
                        tpt1.y = pt1.y - testHt
                        tpt2.y = pt2.y - testHt
                        tpt1.x = pt1.x - testHt/math.tan(math.radians(testAngle))
                        tpt2.x = pt2.x + testHt/math.tan(math.radians(testAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
                        pnpt1 = inkex.paths.Move(tpt1.x, tpt1.y)
                        pnpt2 = inkex.paths.Move(tpt2.x, tpt2.y)
                        if ((not tpath.enclosed) and (self.insidePath(tpath.path, pnpt1) or self.insidePath(tpath.path, pnpt2))) or \
                           (tpath.enclosed and ((not self.insidePath(tpath.path, pnpt1)) and (not self.insidePath(tpath.path, pnpt2)))):
                            tpt1.y = pt1.y + currTabHt
                            tpt2.y = pt2.y + currTabHt
                        else:
                            tpt1.y = pt1.y - currTabHt
                            tpt2.y = pt2.y - currTabHt
                        tpt1.x = pt1.x - currTabHt/math.tan(math.radians(currTabAngle))
                        tpt2.x = pt2.x + currTabHt/math.tan(math.radians(currTabAngle))
                        tl1 = [('M', [pt1.x,pt1.y])]
                        tl1 += [('L', [tpt1.x, tpt1.y])]
                        ele1 = inkex.Path(tl1)
                        tl2 = [('M', [pt1.x,pt1.y])]
                        tl2 += [('L', [tpt2.x, tpt2.y])]
                        ele2 = inkex.Path(tl2)
                        thetal1 = ele1.rotate(theta, [pt1.x,pt1.y])
                        thetal2 = ele2.rotate(theta, [pt2.x,pt2.y])
                        tpt1.x = thetal1[1].x
                        tpt1.y = thetal1[1].y
                        tpt2.x = thetal2[1].x
                        tpt2.y = thetal2[1].y
            # Check to see if any tabs intersect each other
            if self.detectIntersect(pt1.x, pt1.y, tpt1.x, tpt1.y, pt2.x, pt2.y, tpt2.x, tpt2.y):
                # Found an intersection.
                if adjustTab == 0:
                    # Try increasing the tab angle in one-degree increments
                    currTabAngle = currTabAngle + 1.0
                    if currTabAngle > 88.0: # We're not increasing the tab angle above 89 degrees
                        adjustTab = 1
                        currTabAngle = taba
                if adjustTab == 1:
                    # So, try reducing the tab height in 20% increments instead
                    currTabHt = currTabHt - tabht*0.2 # Could this lead to a zero tab_height?
                    if currTabHt <= 0.0:
                        # Give up
                        currTabHt = tabht
                        adjustTab = 2
                if adjustTab == 2:
                    tabDone = True # Just show the failure
            else:
                tabDone = True
            
        return tpt1,tpt2


    def effect(self):
                
        scale = self.svg.unittouu('1'+self.options.unit)
        layer = self.svg.get_current_layer()
        tab_angle = float(self.options.tabangle)
        tab_height = float(self.options.tabheight) * scale
        dashlength = float(self.options.dashlength) * scale
        tabsets = self.options.tabsets
        npaths = []
        savid = ''
        elems = []
        pc = 0
        
        solidLineStyle = {'stroke': str(self.options.color_solid), 'fill': 'none', 'stroke-width': self.options.strokewidth}
        dashLineStyle = {'stroke': str(self.options.color_dash), 'fill': 'none', 'stroke-width': self.options.strokewidth}

        
        for selem in self.svg.selection.filter(inkex.PathElement):
            elems.append(selem)
        if len(elems) == 0:
            raise inkex.AbortExtension("Nothing selected")
        for elem in elems:
            npaths.clear()
            escale = 1.0
            #inkex.utils.debug(elem.attrib)
            if 'transform' in elem.attrib:
                transforms = elem.attrib['transform'].split()
                for tf in transforms:
                    if tf.startswith('scale'):
                        escale = float(tf.split('(')[1].split(')')[0])
            last_letter = 'Z'
            savid = elem.get_id()
            idmod = 0
            elementPath = Path(elem.path.to_absolute().transform(elem.getparent().composed_transform()))
            
            for ptoken in elementPath: # For each point in the path
                ptx2 = None
                pty2 = None
                if ptoken.letter == 'M': # Starting point
                    # Hold this point in case we receive a Z
                    ptx1 = mx = ptoken.x * escale
                    pty1 = my = ptoken.y * escale
                    '''
                    Assign a structure to the new path. We assume that there is
                    only one path and, therefore, it isn't enclosed by a
                    sub-path. However, we'll suffix the ID, if we find a
                    sub-path.
                    '''
                    npath = pathStruct()
                    npath.enclosed = False
                    if idmod > 0:
                        npath.id = elem.get_id()+"-"+str(idmod)
                    else:
                        npath.id = elem.get_id()
                    idmod += 1
                    npath.path.append(inkex.paths.Move(ptx1,pty1))
                else:
                    if last_letter != 'M':
                        ptx1 = ptx2
                        pty1 = pty2
                    if ptoken.letter == 'L':
                        ptx2 = ptoken.x * escale
                        pty2 = ptoken.y * escale
                    elif ptoken.letter == 'H':
                        ptx2 = ptoken.x * escale
                        pty2 = pty1
                    elif ptoken.letter == 'V':
                        ptx2 = ptx1
                        pty2 = ptoken.y * escale
                    elif ptoken.letter == 'Z':
                        ptx2 = mx
                        pty2 = my
                    else:
                        raise inkex.AbortExtension("Unrecognized path command {0}".format(ptoken.letter))
                    npath.path.append(inkex.paths.Line(ptx2,pty2))
                    npath.style = solidLineStyle
                    if ptoken.letter == 'Z':
                        npaths.append(npath)
                    else:
                        if self.options.print_debug is True:
                            self.msg("Warning! Path {} is not closed. Skipping ...".format(elem.get('id')))
                last_letter = ptoken.letter
            # check for cutouts
            if idmod > 1:
                for apath in npaths: # We test these paths to see if they are fully enclosed
                    for bpath in npaths: # by these paths
                        if apath.id != bpath.id:
                            if self.pathInsidePath(bpath.path, apath.path):
                                apath.enclosed = True
            # add tabs to current path(s)
            if 'style' in elem.attrib:
                sstr = elem.attrib['style']
                if not math.isclose(escale, 1.0):
                    lsstr = sstr.split(';')
                    for stoken in range(len(lsstr)):
                        if lsstr[stoken].startswith('stroke-width'):
                            swt = lsstr[stoken].split(':')[1]
                            swf = str(float(swt)*escale)
                            lsstr[stoken] = lsstr[stoken].replace(swt, swf)
                        if lsstr[stoken].startswith('stroke-miterlimit'):
                            swt = lsstr[stoken].split(':')[1]
                            swf = str(float(swt)*escale)
                            lsstr[stoken] = lsstr[stoken].replace(swt, swf)
                    sstr = ";".join(lsstr)
            else:
                sstr = None
            dsub = '' # Used for building sub-paths
            dprop = '' # Used for building the main path
            dscore = '' # Used for building dashlines
            for apath in npaths:
                mpath = [apath.path[0]] # init output path with first point of input path
                for ptn in range(len(apath.path)-1):
                    if (tabsets == 'both') or (((tabsets == 'inside') and (apath.enclosed)) or ((tabsets == 'outside') and (not apath.enclosed))):
                        tabpt1, tabpt2 = self.makeTab(apath, apath.path[ptn], apath.path[ptn+1], tab_height, tab_angle)
                        mpath.append(tabpt1)
                        mpath.append(tabpt2)
                        dscore = dscore + self.makescore(apath.path[ptn], apath.path[ptn+1],dashlength)
                    mpath.append(apath.path[ptn+1])
                if apath.id == elem.get_id():
                    for nodes in range(len(mpath)):
                        if nodes == 0:
                            dprop = 'M ' # This is the main path, which should appear first
                        else:
                            dprop = dprop + ' L '
                        dprop = dprop + str(mpath[nodes].x) + ',' + str(mpath[nodes].y)
                    ## and close the path
                    dprop = dprop + ' Z'
                else:
                    for nodes in range(len(mpath)):
                        if nodes == 0:
                            dsub = dsub + ' M ' # This is a sub-path, which should follow the main path
                        else:
                            dsub = dsub + ' L '
                        dsub = dsub + str(mpath[nodes].x) + ',' + str(mpath[nodes].y)
                    ## and close the path
                    dsub = dsub + ' Z'
            dprop = dprop + dsub # combine all the paths
            if math.isclose(dashlength, 0.0):
                # lump together all the score lines
                group = inkex.elements._groups.Group()
                group.label = 'group'+str(pc)+'ms'
                self.drawline(dprop,'model'+str(pc),group,sstr) # Output the model
                if dscore != '':
                    self.drawline(dscore,'score'+str(pc),group,sstr) # Output the scorelines separately
                layer.append(group)
            else:
                dprop = dprop + dscore
                self.drawline(dprop,savid+'ms',layer,sstr)
            pc += 1
         
            if self.options.keep_original is False:
                elem.delete()  

if __name__ == '__main__':
    Tabgen().run()