From 290582e58a295e4448963a919a8e61db3bc208f6 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@walter-laptop.(none)>
Date: Sun, 28 Feb 2010 03:18:06 +0000
Subject: save as SVG

---
diff --git a/taconstants.py b/taconstants.py
index 0e283bf..cf7cec0 100644
--- a/taconstants.py
+++ b/taconstants.py
@@ -134,7 +134,7 @@ PALETTES = [['clean', 'forward', 'back', 'show', 'left', 'right',
             ['kbinput', 'push', 'printheap', 'keyboard', 'pop', 'clearheap',
              'myfunc1arg',  'userdefined', 'addturtle', 'comment', 'print',
              'cartesian', 'width', 'height', 'polar', 'sandwichtop',
-             'sandwichbottom'],
+             'sandwichbottom', 'savesvg'],
             ['journal', 'audio', 'description', 'savepix', 'hideblocks',
              'showblocks', 'fullscreen', 'picturelist', 'picture1x1a',
              'picture1x1', 'picture2x2', 'picture2x1', 'picture1x2'],
diff --git a/talogo.py b/talogo.py
index c1d1290..4e0bfa5 100644
--- a/talogo.py
+++ b/talogo.py
@@ -339,6 +339,7 @@ class LogoCode:
         'rightx':[0, lambda self: self.tw.rightx],
         'rpos':[0, lambda self: self.tw.canvas.width/(self.tw.coord_scale*2)],
         'savepix':[1, lambda self, x: self.save_picture(x)],
+        'savesvg':[1, lambda self, x: self.save_svg(x)],
         'scale':[0, lambda self: self.scale],
         'setcolor':[1, lambda self, x: self.tw.canvas.setcolor(x)],
         'seth':[1, lambda self, x: self.tw.canvas.seth(x)],
@@ -445,6 +446,7 @@ class LogoCode:
             self.stacks[k] = None
         self.stacks['stack1'] = None
         self.stacks['stack2'] = None
+        self.tw.saving_svg = False
 
         for b in blocks:
             b.unhighlight()
@@ -480,6 +482,8 @@ class LogoCode:
         dock = blk.docks[0]
         if len(dock)>4: # There could be a '(', ')', '[' or ']'.
             code.append(dock[4])
+        if blk.name == 'savesvg':
+            self.tw.saving_svg = True
         if blk.primitive is not None: # make a tuple (prim, blk)
             code.append((blk.primitive, self.tw.block_list.list.index(blk)))
         elif len(blk.values)>0:  # Extract the value from content blocks.
@@ -1002,6 +1006,10 @@ class LogoCode:
     def save_picture(self, name):
         self.tw.save_as_image(name)
 
+    def save_svg(self, name):
+        self.tw.canvas.svg_close()
+        self.tw.save_as_image(name, True)
+
     def show_list(self, sarray):
         x = self.tw.canvas.xcor/self.tw.coord_scale
         y = self.tw.canvas.ycor/self.tw.coord_scale
diff --git a/tasprite_factory.py b/tasprite_factory.py
index e7a0e44..be2b676 100755
--- a/tasprite_factory.py
+++ b/tasprite_factory.py
@@ -30,10 +30,10 @@ class SVG:
     def __init__(self):
         self._x = 0
         self._y = 0
-        self._min_x = 0
-        self._min_y = 0
-        self._max_x = 0
-        self._max_y = 0
+        self._min_x = 10000
+        self._min_y = 10000
+        self._max_x = -10000
+        self._max_y = -10000
         self._width = 0
         self._height = 0
         self.docks = []
@@ -545,6 +545,12 @@ class SVG:
     def set_no_arm(self, flag=True):
         self._no_arm = flag
 
+    def reset_min_max(self):
+        self._min_x = 10000
+        self._min_y = 10000
+        self._max_x = -10000
+        self._max_y = -10000
+
     #
     # Exotic methods
     #
@@ -574,7 +580,7 @@ class SVG:
     # SVG helper methods
     #
 
-    def _header(self):
+    def _header(self, center=False):
         return "%s%s%s%s%s%s%s%s%.1f%s%s%.1f%s%s%s" % (
             "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
             "<!-- Created with Python -->\n",
@@ -586,7 +592,7 @@ class SVG:
             "   width=\"", self._width, "\"\n",
             "   height=\"", self._height, "\">\n",
             self._defs(),
-            self._transform())
+            self._transform(center))
 
     def _defs(self):
         if self._gradiant is True:
@@ -608,14 +614,18 @@ class SVG:
         else:
             return ""
 
-    def _transform(self):
+    def _transform(self, center):
         if self._orientation != 0:
             orientation = "<g\ntransform = \"rotate(%.1f %.1f %.1f)\">\n" % (
                 self._orientation, self._width/2.0, self._height/2.0)
         else:
             orientation = ""
-        return "<g\ntransform=\"scale(%.1f, %.1f)\">\n%s" % (
-                self._scale, self._scale, orientation )
+        if center:
+            return "<g\ntransform=\"translate(%.1f, %.1f)\">\n" % (
+                    -self._min_x, -self._min_y)
+        else:
+            return "<g\ntransform=\"scale(%.1f, %.1f)\">\n%s" % (
+                    self._scale, self._scale, orientation )
 
     def _footer(self):
         if self._orientation != 0:
@@ -735,10 +745,12 @@ class SVG:
         return svg_str
 
     def new_path(self, x, y):
+        """
         self._min_x = x
         self._min_y = y
         self._max_x = x
         self._max_y = y
+        """
         self._x = x
         self._y = y
         return "      <path d=\"m%.1f %.1f " % (x, y)
diff --git a/tautils.py b/tautils.py
index a889095..48ac5ce 100644
--- a/tautils.py
+++ b/tautils.py
@@ -143,6 +143,10 @@ def save_picture(canvas, fname):
                              0, 0, 0, 0, canvas.width, canvas.height)
     pixbuf.save(fname, 'png')
 
+def save_svg(string, fname):
+    f = file(fname, "w")
+    f.write(string)
+    f.close()
 
 def get_pixbuf_from_journal(dsobject, w, h):
     try:
diff --git a/tawindow.py b/tawindow.py
index 59ab210..eb42aad 100644
--- a/tawindow.py
+++ b/tawindow.py
@@ -55,7 +55,7 @@ from taturtle import Turtles, Turtle
 from tautils import magnitude, get_load_name, get_save_name, data_from_file,\
                     data_to_file, round_int, get_id, get_pixbuf_from_journal,\
                     movie_media_type, audio_media_type, image_media_type,\
-                    save_picture, calc_image_size
+                    save_picture, save_svg, calc_image_size
 from tasprite_factory import SVG, svg_str_to_pixbuf, svg_from_file
 from sprites import Sprites, Sprite
 
@@ -176,6 +176,8 @@ class TurtleArtWindow():
         else:
             Turtle(self.turtles, 1, mycolors.split(','))
         self.active_turtle = self.turtles.get_turtle(1)
+        self.saving_svg = False
+        self.svg_string = ''
         self.selected_turtle = None
         self.canvas = TurtleGraphics(self, self.width, self.height)
         self.titlex = -(self.canvas.width*TITLEXY[0])/(self.coord_scale*2)
@@ -2600,11 +2602,17 @@ class TurtleArtWindow():
     """
     Grab the current canvas and save it.
     """
-    def save_as_image(self, name=""):
-        if len(name) == 0:
-            filename = "ta.png"
+    def save_as_image(self, name="", svg=False):
+        if svg:
+            if len(name) == 0:
+                filename = "ta.svg"
+            else:
+                filename = name+".svg"
         else:
-            filename = name+".png"
+            if len(name) == 0:
+                filename = "ta.png"
+            else:
+                filename = name+".png"
 
         if self.running_sugar:
             datapath = os.path.join(self.activity.get_activity_root(),
@@ -2612,7 +2620,11 @@ class TurtleArtWindow():
         else:
             datapath = os.getcwd()
         file_path = os.path.join(datapath, filename)
-        save_picture(self.canvas, file_path)
+        if svg:
+            save_svg(self.svg_string, file_path)
+            self.svg_string = ''
+        else:
+            save_picture(self.canvas, file_path)
 
         if self.running_sugar:
             dsobject = datastore.create()
@@ -2622,7 +2634,10 @@ class TurtleArtWindow():
             else:
                 dsobject.metadata['title'] = name
             dsobject.metadata['icon-color'] = profile.get_color().to_string()
-            dsobject.metadata['mime_type'] = 'image/png'
+            if svg:
+                dsobject.metadata['mime_type'] = 'image/svg'
+            else:
+                dsobject.metadata['mime_type'] = 'image/png'
             dsobject.set_file_path(file_path)
             datastore.write(dsobject)
             dsobject.destroy()
--
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