Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 174 insertions, 0 deletions

diff --git a/share/extensions/motion.py b/share/extensions/motion.py
new file mode 100755
index 0000000..9ceab4a
--- /dev/null
+++ b/share/extensions/motion.py
@@ -0,0 +1,174 @@
+#!/usr/bin/env python
+# coding=utf-8
+#
+# 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.
+#
+"""Adds a "drop shadow" to any selected number of path objects. Optionally, the stroke
+color can be used for the shadow"""
+
+import math
+
+import inkex
+from inkex.paths import (
+    Move,
+    Line,
+    Curve,
+    ZoneClose,
+    Arc,
+    Path,
+    Vert,
+    Horz,
+    TepidQuadratic,
+    Quadratic,
+    Smooth,
+)
+from inkex.transforms import Vector2d
+from inkex.bezier import beziertatslope, beziersplitatt
+
+
+class Motion(inkex.EffectExtension):
+    """Generate a motion path"""
+
+    def add_arguments(self, pars):
+        pars.add_argument(
+            "-a",
+            "--angle",
+            type=float,
+            default=45.0,
+            help="direction of the motion vector",
+        )
+        pars.add_argument(
+            "-m",
+            "--magnitude",
+            type=float,
+            default=100.0,
+            help="magnitude of the motion vector",
+        )
+        pars.add_argument(
+            "-f",
+            "--fillwithstroke",
+            type=inkex.Boolean,
+            default=False,
+            help="fill shadow with stroke color if set",
+        )
+
+    @staticmethod
+    def makeface(last, segment, facegroup, delx, dely):
+        """translate path segment along vector"""
+        elem = facegroup.add(inkex.PathElement())
+
+        npt = segment.translate([delx, dely])
+
+        # reverse direction of path segment
+        if isinstance(segment, Curve):
+            rev = Curve(npt.x3, npt.y3, npt.x2, npt.y2, last[0] + delx, last[1] + dely)
+        elif isinstance(segment, Line):
+            rev = Line(last[0] + delx, last[1] + dely)
+        else:
+            raise RuntimeError("Unexpected segment type {}".format(type(segment)))
+
+        elem.path = inkex.Path(
+            [
+                Move(last[0], last[1]),
+                segment,
+                npt.to_line(Vector2d()),
+                rev,
+                ZoneClose(),
+            ]
+        )
+
+    def effect(self):
+        delx = math.cos(math.radians(self.options.angle)) * self.options.magnitude
+        dely = math.sin(math.radians(self.options.angle)) * self.options.magnitude
+        for node in self.svg.selection.filter_nonzero(inkex.PathElement):
+            group = node.getparent().add(inkex.Group())
+            facegroup = group.add(inkex.Group())
+            group.append(node)
+
+            # we want delx and dely values to be correct even for the transformed path,
+            # so transform them back, but ignore the translate of the transform
+            trans = -node.transform
+            local_delx = trans.a * delx + trans.c * dely
+            local_dely = trans.b * delx + trans.d * dely
+
+            if node.transform:
+                group.transform = node.transform
+                node.transform = None
+
+            facegroup.style = node.style
+            if self.options.fillwithstroke:
+                stroke = facegroup.style("stroke")
+                if stroke is not None and isinstance(stroke, inkex.Color):
+                    facegroup.style["fill"] = stroke
+                    facegroup.style["fill-opacity"] = facegroup.style("stroke-opacity")
+            reset_origin = True
+            for cmd_proxy in node.path.to_absolute().proxy_iterator():
+                # for each subpath, reset the origin of the following computations to the first
+                # node of the subpath -> i.e. after a Z command, move the origin to the end point
+                # of the next command
+                if reset_origin:
+                    first_point = cmd_proxy.end_point
+                    reset_origin = False
+                if isinstance(cmd_proxy.command, ZoneClose):
+                    reset_origin = True
+                self.process_segment(
+                    cmd_proxy, facegroup, local_delx, local_dely, first_point
+                )
+
+    @staticmethod
+    def process_segment(cmd_proxy, facegroup, delx, dely, first_point):
+        """Process each segments"""
+
+        segments = []
+        if isinstance(
+            cmd_proxy.command, (Curve, Smooth, TepidQuadratic, Quadratic, Arc)
+        ):
+            prev = cmd_proxy.previous_end_point
+            for curve in cmd_proxy.to_curves():
+                bez = [prev] + curve.to_bez()
+                prev = curve.end_point(cmd_proxy.first_point, prev)
+                tees = [t for t in beziertatslope(bez, (dely, delx)) if 0 < t < 1]
+                tees.sort()
+                if len(tees) == 1:
+                    one, two = beziersplitatt(bez, tees[0])
+                    segments.append(Curve(*(one[1] + one[2] + one[3])))
+                    segments.append(Curve(*(two[1] + two[2] + two[3])))
+                elif len(tees) == 2:
+                    one, two = beziersplitatt(bez, tees[0])
+                    two, three = beziersplitatt(two, tees[1])
+                    segments.append(Curve(*(one[1] + one[2] + one[3])))
+                    segments.append(Curve(*(two[1] + two[2] + two[3])))
+                    segments.append(Curve(*(three[1] + three[2] + three[3])))
+                else:
+                    segments.append(curve)
+        elif isinstance(cmd_proxy.command, (Line, Curve)):
+            segments.append(cmd_proxy.command)
+        elif isinstance(cmd_proxy.command, ZoneClose):
+            segments.append(Line(*first_point))
+        elif isinstance(cmd_proxy.command, (Vert, Horz)):
+            segments.append(cmd_proxy.command.to_line(cmd_proxy.end_point))
+
+        for seg in Path(
+            [Move(*cmd_proxy.previous_end_point)] + segments
+        ).proxy_iterator():
+            if isinstance(seg.command, Move):
+                continue
+            Motion.makeface(seg.previous_end_point, seg.command, facegroup, delx, dely)
+
+
+if __name__ == "__main__":
+    Motion().run()