Adding upstream version 1.0.2.upstream/1.0.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 195 insertions, 0 deletions

diff --git a/share/extensions/measure.py b/share/extensions/measure.py
new file mode 100755
index 0000000..2f18f9c
--- /dev/null
+++ b/share/extensions/measure.py
@@ -0,0 +1,195 @@
+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2015 ~suv <suv-sf@users.sf.net>
+# Copyright (C) 2010 Alvin Penner
+# Copyright (C) 2006 Georg Wiora
+# Copyright (C) 2006 Nathan Hurst
+# Copyright (C) 2005 Aaron Spike, aaron@ekips.org
+#
+# 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.
+#
+"""
+This extension module can measure arbitrary path and object length
+It adds text to the selected path containing the length in a given unit.
+Area and Center of Mass calculated using Green's Theorem:
+http://mathworld.wolfram.com/GreensTheorem.html
+"""
+
+import inkex
+
+from inkex import TextElement, TextPath, Tspan
+from inkex.bezier import csparea, cspcofm, csplength
+
+class MeasureLength(inkex.EffectExtension):
+    """Measure the length of selected paths"""
+    def add_arguments(self, pars):
+        pars.add_argument("--type", dest="mtype", default="length",\
+            help="Type of measurement")
+        pars.add_argument("--method", type=self.arg_method(), default=self.method_textonpath,\
+            help="Text Orientation method")
+        pars.add_argument("--presetFormat", default="TaP_start", help="Preset text layout")
+        pars.add_argument("--startOffset", default="custom", help="Text Offset along Path")
+        pars.add_argument("--startOffsetCustom", type=int, default=50,\
+            help="Text Offset along Path")
+        pars.add_argument("--anchor", default="start", help="Text Anchor")
+        pars.add_argument("--position", default="start", help="Text Position")
+        pars.add_argument("--angle", type=float, default=0, help="Angle")
+        pars.add_argument("-f", "--fontsize", type=int, default=20,\
+            help="Size of length label text in px")
+        pars.add_argument("-o", "--offset", type=float, default=-6,\
+            help="The distance above the curve")
+        pars.add_argument("-u", "--unit", default="mm",\
+            help="The unit of the measurement")
+        pars.add_argument("-p", "--precision", type=int, default=2,\
+            help="Number of significant digits after decimal point")
+        pars.add_argument("-s", "--scale", type=float, default=1.1,\
+            help="Scale Factor (Drawing:Real Length)")
+
+    def effect(self):
+        # get number of digits
+        prec = int(self.options.precision)
+        scale = self.svg.unittouu('1px')  # convert to document units
+        self.options.offset *= scale
+        factor = 1.0
+
+        if self.svg.get('viewBox'):
+            factor = self.svg.scale / self.svg.unittouu('1px')
+            self.options.fontsize /= factor
+
+        factor *= scale / self.svg.unittouu('1' + self.options.unit)
+
+        # loop over all selected paths
+        for node in self.svg.selection.filter(inkex.PathElement).values():
+            csp = node.path.transform(node.composed_transform()).to_superpath()
+            if self.options.mtype == "length":
+                slengths, stotal = csplength(csp)
+                self.group = node.getparent().add(TextElement())
+            elif self.options.mtype == "area":
+                stotal = abs(csparea(csp) * factor * self.options.scale)
+                self.group = node.getparent().add(TextElement())
+            else:
+                try:
+                    xc, yc = cspcofm(csp)
+                except ValueError as err:
+                    raise inkex.AbortExtension(str(err))
+                self.group = node.getparent().add(inkex.PathElement())
+                self.group.set('id', 'MassCenter_' + node.get('id'))
+                self.add_cross(self.group, xc, yc, scale)
+                continue
+            # Format the length as string
+            val = round(stotal * factor * self.options.scale, prec)
+            self.options.method(node, str(val))
+
+    def method_textonpath(self, node, lenstr):
+        startOffset = self.options.startOffset
+        if startOffset == "custom":
+            startOffset = str(self.options.startOffsetCustom) + '%'
+        if self.options.mtype == "length":
+            self.add_textonpath(self.group, 0, 0, lenstr + ' ' + self.options.unit, node, self.options.anchor, startOffset, self.options.offset)
+        else:
+            self.add_textonpath(self.group, 0, 0, lenstr + ' ' + self.options.unit + '^2', node, self.options.anchor, startOffset, self.options.offset)
+
+    def method_fixedtext(self, node, lenstr):
+        _id = node.get('id')
+        csp = node.path.transform(node.composed_transform()).to_superpath()
+        if self.options.position == "mass":
+            tx, ty = cspcofm(csp)
+            anchor = 'middle'
+        elif self.options.position == "center":
+            bbox = node.bounding_box()
+            tx, ty = bbox.center
+            anchor = 'middle'
+        else:  # default
+            tx = csp[0][0][1][0]
+            ty = csp[0][0][1][1]
+            anchor = 'start'
+        if self.options.mtype == "length":
+            self.add_fixedtext(self.group, tx, ty, lenstr + ' ' + self.options.unit, anchor, -int(self.options.angle), self.options.offset + self.options.fontsize / 2)
+        else:
+            self.add_fixedtext(self.group, tx, ty, lenstr + ' ' + self.options.unit + '^2', anchor, -int(self.options.angle), -self.options.offset + self.options.fontsize / 2)
+
+    def method_presets(self, node, lenstr):
+        """A preset option for alignments"""
+        preset_dict = {
+            'default_cofm':   [None, None, None, None, None],
+            'default_length': [self.method_textonpath, "50%", "start", None, None],
+            'TaP_start':      [self.method_textonpath, "0%", "start", None, None],
+            'TaP_middle':     [self.method_textonpath, "50%", "middle", None, None],
+            'TaP_end':        [self.method_textonpath, "100%", "end", None, None],
+            'default_area':   [self.method_fixedtext, None, None, "start", 0.0],
+            'FT_start':       [self.method_fixedtext, None, None, "start", 0.0],
+            'FT_bbox':        [self.method_fixedtext, None, None, "center", 0.0],
+            'FT_mass':        [self.method_fixedtext, None, None, "mass", 0.0],
+        }
+
+        if self.options.presetFormat == "default":
+            current_preset = 'default_' + self.options.mtype
+        else:
+            current_preset = self.options.presetFormat
+
+        self.options.startOffset = preset_dict[current_preset][1]
+        self.options.anchor = preset_dict[current_preset][2]
+        self.options.position = preset_dict[current_preset][3]
+        self.options.angle = preset_dict[current_preset][4]
+        method = preset_dict[current_preset][0]
+        if method is not None:
+            return method(node, lenstr)
+
+    def add_cross(self, node, x, y, scale):
+        l = 3 * scale  # 3 pixels in document units
+        node.set('d', 'm %s,%s %s,0 %s,0 m %s,%s 0,%s 0,%s' % (str(x - l), str(y), str(l), str(l), str(-l), str(-l), str(l), str(l)))
+        node.set('style', 'stroke:#000000;fill:none;stroke-width:%s' % str(0.5 * scale))
+
+    def add_textonpath(self, node, x, y, text, _node, anchor, startOffset, dy=0):
+        new = node.add(TextPath())
+        s = {'text-align': 'center', 'vertical-align': 'bottom',
+             'text-anchor': anchor, 'font-size': str(self.options.fontsize),
+             'fill-opacity': '1.0', 'stroke': 'none',
+             'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
+        new.style = s
+        new.href = _node
+        new.set('startOffset', startOffset)
+        new.set('dy', str(dy))  # dubious merit
+        # new.append(tp)
+        if text[-2:] == "^2":
+            new.append(Tspan.superscript("2"))
+            new.text = str(text)[:-2]
+        else:
+            new.text = str(text)
+        # node.set('transform','rotate(180,'+str(-x)+','+str(-y)+')')
+        node.set('x', str(x))
+        node.set('y', str(y))
+
+    def add_fixedtext(self, node, x, y, text, anchor, angle, dy=0):
+        new = node.add(Tspan())
+        new.set('sodipodi:role', 'line')
+        s = {'text-align': 'center', 'vertical-align': 'bottom',
+             'text-anchor': anchor, 'font-size': str(self.options.fontsize),
+             'fill-opacity': '1.0', 'stroke': 'none',
+             'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
+        new.style = s
+        new.set('dy', str(dy))
+        if text[-2:] == "^2":
+            new.append(Tspan.superscript("2"))
+            new.text = str(text)[:-2]
+        else:
+            new.text = str(text)
+        node.set('x', str(x))
+        node.set('y', str(y))
+        node.set('transform', 'rotate(%s, %s, %s)' % (angle, x, y))
+
+if __name__ == '__main__':
+    MeasureLength().run()