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-#Copyright (c) 2008-10, Walter Bender
-
-#Permission is hereby granted, free of charge, to any person obtaining a copy
-#of this software and associated documentation files (the "Software"), to deal
-#in the Software without restriction, including without limitation the rights
-#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-#copies of the Software, and to permit persons to whom the Software is
-#furnished to do so, subject to the following conditions:
-
-#The above copyright notice and this permission notice shall be included in
-#all copies or substantial portions of the Software.
-
-#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-#THE SOFTWARE.
-
-IGNORE = ["hideblocks", "showblocks", "fullscreen", "polar", "cartesian",
- "sandwichbottom", "id"]
-
-import math
-from tautils import walk_stack
-try:
- from sugar.datastore import datastore
-except:
- pass
-
-def save_logo(tw):
- """ We need to set up the Turtle Art color palette and color processing. """
- color_processing = "\
-to tasetpalette :i :r :g :b :myshade \r\
-make \"s ((:myshade - 50) / 50) \r\
-ifelse lessp :s 0 [ \r\
-make \"s (1 + (:s *0.8)) \r\
-make \"r (:r * :s) \r\
-make \"g (:g * :s) \r\
-make \"b (:b * :s) \r\
-] [ \
-make \"s (:s * 0.9) \r\
-make \"r (:r + ((99-:r) * :s)) \r\
-make \"g (:g + ((99-:g) * :s)) \r\
-make \"b (:b + ((99-:b) * :s)) \r\
-] \
-setpalette :i (list :r :g :b) \r\
-end \r\
-\
-to rgb :myi :mycolors :myshade \r\
-make \"myr first :mycolors \r\
-make \"mycolors butfirst :mycolors \r\
-make \"myg first :mycolors \r\
-make \"mycolors butfirst :mycolors \r\
-make \"myb first :mycolors \r\
-make \"mycolors butfirst :mycolors \r\
-tasetpalette :myi :myr :myg :myb :myshade \r\
-output :mycolors \r\
-end \r\
-\
-to processcolor :mycolors :myshade \r\
-if emptyp :mycolors [stop] \r\
-make \"i :i + 1 \r\
-processcolor (rgb :i :mycolors :myshade) :myshade \r\
-end \r\
-\
-to tasetshade :shade \r\
-make \"myshade modulo :shade 200 \r\
-if greaterp :myshade 99 [make \"myshade (199-:myshade)] \r\
-make \"i 7 \r\
-make \"mycolors :colors \r\
-processcolor :mycolors :myshade \r\
-end \r\
-\
-to tasetpencolor :c \r\
-make \"color (modulo (round :c) 100) \r\
-setpencolor :color + 8 \r\
-end \r\
-\
-make \"colors [ \
-99 0 0 99 5 0 99 10 0 99 15 0 99 20 0 \
-99 25 0 99 30 0 99 35 0 99 40 0 99 45 0 \
-99 50 0 99 55 0 99 60 0 99 65 0 99 70 0 \
-99 75 0 99 80 0 99 85 0 99 90 0 99 95 0 \
-99 99 0 90 99 0 80 99 0 70 99 0 60 99 0 \
-50 99 0 40 99 0 30 99 0 20 99 0 10 99 0 \
- 0 99 0 0 99 5 0 99 10 0 99 15 0 99 20 \
- 0 99 25 0 99 30 0 99 35 0 99 40 0 99 45 \
- 0 99 50 0 99 55 0 99 60 0 99 65 0 99 70 \
- 0 99 75 0 99 80 0 99 85 0 99 90 0 99 95 \
- 0 99 99 0 95 99 0 90 99 0 85 99 0 80 99 \
- 0 75 99 0 70 99 0 65 99 0 60 99 0 55 99 \
- 0 50 99 0 45 99 0 40 99 0 35 99 0 30 99 \
- 0 25 99 0 20 99 0 15 99 0 10 99 0 5 99 \
- 0 0 99 5 0 99 10 0 99 15 0 99 20 0 99 \
-25 0 99 30 0 99 35 0 99 40 0 99 45 0 99 \
-50 0 99 55 0 99 60 0 99 65 0 99 70 0 99 \
-75 0 99 80 0 99 85 0 99 90 0 99 95 0 99 \
-99 0 99 99 0 90 99 0 80 99 0 70 99 0 60 \
-99 0 50 99 0 40 99 0 30 99 0 20 99 0 10] \r\
-make \"shade 50 \r\
-tasetshade :shade \r"
-
- bs = tw.just_blocks()
- code = ""
- stack_count = 0
- show = 0
-
- # These flags are used to trigger the prepending of additional procedures.
- random = False
- fillscreen = False
- setcolor = False
- setxy = False
- pensize = False
- setpensize = False
- arc = False
- heap = False
- write = False
- minus = False
- division = False
- image = False
-
- """
- Walk through the code, substituting UCB Logo for Turtle Art primitives.
- """
- for b in bs:
- this_stack = ""
- data = walk_stack(tw, b)
- # We need to catch several special cases: stacks, random, etc.
- stack = False
- namedstack = False
- namedbox = False
- refstack = False
- refbox = False
- myvar = ""
- for d in data:
- if type(d) == type((1, 2)):
- (d, b) = d
- if type(d) is float:
- if namedbox:
- myvar += str(d)
- myvar += " "
- elif write:
- this_stack += "labelsize "
- this_stack += str(d)
- write = False
- else:
- this_stack += str(d)
- elif show == 2:
- # Use title for Journal objects
- if d[0:8] == '#smedia_':
- try:
- dsobject = datastore.get(d[8:])
- this_stack += dsobject.metadata['title']
- dsobject.destroy()
- except:
- this_stack += str(d)
- else:
- this_stack += str(d)
- show = 0
- else:
- # Translate some Turtle Art primitives into UCB Logo
- if namedstack:
- this_stack += "to "
- this_stack += d[2:].replace(" ","_")
- this_stack += "\r"
- stack = True
- namedstack = False
- elif namedbox:
- if d[0:2] == "#s":
- this_stack += "make \""
- this_stack += d[2:].replace(" ","_")
- this_stack += " "
- this_stack += myvar
- namedbox = False
- myvar = ""
- else:
- myvar += d
- elif refstack:
- this_stack += d[2:].replace(" ","_")
- this_stack += " "
- refstack = False
- elif refbox:
- this_stack += ":"
- this_stack += d[2:].replace(" ","_")
- refbox = False
- elif d == "stack":
- refstack = True
- elif d == "box":
- refbox = True
- elif d == "storeinbox":
- namedbox = True
- elif d == "storeinbox1":
- this_stack += "make \"box1"
- elif d == "box1":
- this_stack += ":box1"
- elif d == "storeinbox2":
- this_stack += "make \"box2"
- elif d == "box2":
- this_stack += ":box2"
- elif d == "shade":
- this_stack += ":shade"
- elif d == "setshade":
- setcolor = True
- this_stack += "tasetshade"
- elif d == "color":
- this_stack += "pencolor"
- elif d == "nop":
- this_stack += " "
- elif d == "start":
- this_stack += "to start\r"
- stack = True
- elif d == "nop1":
- this_stack += "to stack1\r"
- stack = True
- elif d == "nop2":
- this_stack += "to stack2\r"
- stack = True
- elif d == "nop3":
- namedstack = True
- elif d == "stopstack":
- this_stack += "stop"
- elif d == "clean":
- this_stack += "clearscreen"
- elif d == "setxy":
- setxy = True
- this_stack += "tasetxy"
- elif d == "color":
- this_stack += ":color"
- elif d == "plus":
- this_stack += "sum"
- elif d == "setcolor":
- setcolor = True
- this_stack += "tasetpencolor"
- elif d == "fillscreen":
- fillscreen = True
- setcolor = True
- this_stack += "tasetbackground"
- elif d == "random":
- random = True
- this_stack += "tarandom"
- elif d == "pensize":
- pensize = True
- this_stack += "tapensize"
- elif d == "setpensize":
- setpensize = True
- this_stack += "tasetpensize"
- elif d == "arc":
- arc = True
- this_stack += "taarc"
- elif d == "pop":
- heap = True
- this_stack += "tapop"
- elif d == "push":
- heap = True
- this_stack += "tapush"
- elif d == "heap":
- heap = True
- this_stack += "taprintheap"
- elif d == "emptyheap":
- heap = True
- this_stack += "taclearheap"
- elif d == "kbinput":
- this_stack += "make \"keyboard readchar"
- elif d == "keyboard":
- this_stack += ":keyboard"
- elif d == 'insertimage':
- image = True
- elif image:
- # Skip this arg
- image = 2
- elif image == 2:
- # Skip this arg
- image = False
- elif d[0:2] == "#s":
- # output single characters as a string
- if len(d[2:]):
- this_stack += "\""
- this_stack += d[2:]
- # make a sentence out of everything else
- else:
- this_stack += "sentence "
- this_stack += d[2:].replace("\s"," \"")
- this_stack += "\r"
- elif d == "write":
- this_stack += "label"
- write = True
- elif d == 'show' or d == 'showaligned':
- this_stack += "label"
- show = 1
- elif d == "minus2":
- this_stack += "taminus"
- minus = True
- elif d == "division":
- this_stack += "quotient"
- elif d == "lpos":
- this_stack += str(-tw.canvas.width/(tw.coord_scale*2))
- elif d == "rpos":
- this_stack += str(tw.canvas.width/(tw.coord_scale*2))
- elif d == "bpos":
- this_stack += str(-tw.canvas.height/(tw.coord_scale*2))
- elif d == "tpos":
- this_stack += str(tw.canvas.height/(tw.coord_scale*2))
- elif d in IGNORE:
- this_stack += " "
- elif show == 1 and d[0:2] == "#s":
- this_stack += d[2:]
- # We don't handle depreciated 'template' blocks
- else:
- this_stack += d
- this_stack += " "
- if stack:
- stack = False
- # if it is not a stack, we need to add a "to ta#" label
- elif len(data) > 0:
- this_stack = "to ta" + str(stack_count) + "\r" + this_stack
- stack_count += 1
- if len(data) > 0:
- code += this_stack
- code += "\rend\r"
-
- # We need to define some additional procedures.
- if minus: # Logo minus only takes one argument.
- code = "to taminus :y :x\routput sum :x minus :y\rend\r" + code
- if random: # to avoid negative numbers
- code = "to tarandom :min :max\r" + \
- "output (random (:max - :min)) + :min\rend\r" + code
- if fillscreen: # Set shade than background color
- code = "to tasetbackground :color :shade\r" + \
- "tasetshade :shade\rsetbackground :color\rend\r" + code
- if setcolor: # Load the Turtle Art color palette.
- code = color_processing + code
- if setpensize: # Set int of pensize
- code = "to tasetpensize :a\rsetpensize round :a\rend\r" + code
- if pensize: # Return only the first argument.
- code = "to tapensize\routput first round pensize\rend\r" + code
- if setxy: # Swap and round arguments
- code = "to tasetxy :x :y\rpenup\rsetxy :x :y\rpendown\rend\r" + code
- if arc: # Turtle Art 'arc' needs to be redefined.
- c = (2 * math.pi)/360
- code = "to taarc :a :r\rrepeat round :a [right 1 forward (" + \
- str(c) + " * :r)]\rend\r" + code
- if heap: # Add psuedo 'push' and 'pop'
- code = "to tapush :foo\rmake \"taheap fput :foo :taheap\rend\r" + \
- "to tapop\rif emptyp :taheap [stop]\rmake \"tmp first :taheap\r" + \
- "make \"taheap butfirst :taheap\routput :tmp\rend\r" + \
- "to taclearheap\rmake \"taheap []\rend\r" + \
- "to taprintheap \rprint :taheap\rend\r" + \
- "make \"taheap []\r" + code
- code = "window\r" + code
- return code
-
-