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compiler.py
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compiler.py
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# coding=utf-8
import AST
import random
from AST import addToClass
# HTML template
HTMLContent = """
<!DOCTYPE html>
<html>
<head>
<script src="%s.js"></script>
<title>%s</title>
</head>
<body style="margin: 0px; padding: 0px; overflow:hidden;">
<canvas id="bbcCanvas" width="500" height="500"></canvas>
</body>
</html>
"""
# JS main template
JSContent = """
window.onload = function() {
canvas = document.getElementById('bbcCanvas');
BACKGROUND_SIZE = {
width:window.innerWidth,
height:window.innerHeight
}
ctx = canvas.getContext('2d');
BACKGROUND_COLOR = 'rgb(255, 255, 255)';
UPDATE_TIME = 5.0;
bbcInit();
bbcUpdate();
canvas.width = BACKGROUND_SIZE.width;
canvas.height = BACKGROUND_SIZE.height;
}
function bbcInit() {
start = Date.now();
%s
updateTime = 1000 * UPDATE_TIME;
}
function bbcUpdate() {
if(Date.now() > start + updateTime) {
bbcInit();
}
%s
bbcDraw();
}
function bbcDraw() {
ctx.clearRect(0, 0, bbcCanvas.width, bbcCanvas.height);
ctx.fillStyle = BACKGROUND_COLOR;
ctx.fillRect(0, 0, canvas.width, canvas.height);
%s
setTimeout(bbcUpdate, 1000 / 60);
}
"""
# Templates for JS code
JSInit = ""
JSUpdate = ""
JSDraw = ""
JSCircle = """
ctx.save();
ctx.translate(%s, %s);
ctx.rotate(%s * Math.PI / 180);
ctx.translate(-%s, -%s);
ctx.beginPath();
ctx.arc(%s, %s, %s, 0, 2 * Math.PI);
ctx.fill();
ctx.stroke();
ctx.restore();
"""
JSRect = """
ctx.save();
ctx.translate(%s, %s);
ctx.rotate(%s * Math.PI / 180);
ctx.translate(-%s, -%s);
ctx.beginPath();
ctx.rect(%s, %s, %s, %s);
ctx.fill();
ctx.stroke();
ctx.restore();
"""
JSPolygon = """
ctx.save();
ctx.translate(%s, %s);
ctx.rotate(%s * Math.PI / 180);
ctx.translate(-%s, -%s);
ctx.beginPath();%s
ctx.closePath();
ctx.fill();
ctx.stroke();
ctx.restore();
"""
JSMoveTo = """
ctx.moveTo(%s, %s);
"""
JSLineTo = """
ctx.lineTo(%s, %s);
"""
JSColor = """
ctx.fillStyle = 'rgb(%s, %s, %s)';
"""
JSAssign = """
%s = %s;
"""
JSRandom = """
Math.floor(Math.random() * ({1} - {0} + 1)) + {0}
"""
# JS Objects
bbc_shape_num = 0
# Increment the variable name counter
def nextShapeNum():
global bbc_shape_num
bbc_shape_num += 1
return bbc_shape_num
# JS Circle Object
JSCircleObject = """{
point:%s,
radius:%s,
color:%s,
rotation:%s,
around:%s
}"""
# JS Rect Object
JSRectObject = """{
point:%s,
size:%s,
color:%s,
rotation:%s,
around:%s
}"""
# JS Polygon Object
JSPolygonObject = """{
point:%s,
points:%s,
color:%s,
rotation:%s,
around:%s
}"""
# JS Size Object
JSSizeObject = """{ width:%s, height:%s }"""
# JS Point Object
JSPointObject = """{ x:%s, y:%s }"""
# JS Color Object
JSColorObject = """{ r:%s, g:%s, b:%s }"""
# JS animations
JSTranslate = """
%s.point.x += %s;
%s.point.y += %s;
"""
JSRotate = """
%s += %s;
%s.around.x = %s;
%s.around.y = %s;
"""
# Operations
operations = {
'+' : lambda x,y: x+y,
'-' : lambda x,y: x-y,
'*' : lambda x,y: x*y,
'/' : lambda x,y: x/y,
}
# Variables storage
vars = {}
# Node of the program
@addToClass(AST.ProgramNode)
def compile(self):
global JSInit
global JSUpdate
global JSDraw
for c in self.children:
c.compile()
return JSContent %(JSInit, JSUpdate, JSDraw)
# Node of the subprogram
@addToClass(AST.SubProgramNode)
def compile(self):
for c in self.children:
c.compile()
# Node of the for lopp
@addToClass(AST.ForNode)
def compile(self):
start = int(self.children[0].compile())
end = int(self.children[1].compile())
step = int(self.children[2].compile())
for i in range(start, end, step):
self.children[3].compile()
# Node of the token
@addToClass(AST.TokenNode)
def compile(self):
if isinstance(self.tok, str):
try:
return vars[self.tok]
except KeyError:
print ("*** Error: variable %s undefined!" % self.tok)
return self.tok
# Node of the shape token
@addToClass(AST.TokenStrNode)
def compile(self):
return self.tok
# Node of the size assignement
@addToClass(AST.AssignSizeNode)
def compile(self):
global JSInit
identifier = self.children[0].compile()
value = self.children[1].compile()
JSInit += JSAssign %(identifier, value)
# Node of the point assignement
@addToClass(AST.AssignPointNode)
def compile(self):
global JSInit
identifier = self.children[0].compile()
value = self.children[1].compile()
JSInit += JSAssign %(identifier, value[0])
# Node of the color assignement
@addToClass(AST.AssignColorNode)
def compile(self):
global JSInit
identifier = self.children[0].compile()
value = self.children[1].compile()
JSInit += JSAssign %(identifier, value[0])
# Node of the shape assignement
@addToClass(AST.AssignShapeNode)
def compile(self):
global JSInit
identifier = self.children[0].compile()
value = self.children[1].compile()
JSInit += JSAssign %(identifier, value[1])
# Node of the time assignement
@addToClass(AST.AssignTimeNode)
def compile(self):
global JSInit
identifier = self.children[0].compile()
value = self.children[1].compile()
JSInit += JSAssign %(identifier, value)
# Node of the assignement
@addToClass(AST.AssignNode)
def compile(self):
identifier = self.children[0].tok
value = self.children[1].compile()
vars[identifier] = value
# Node of the operation
@addToClass(AST.OpNode)
def compile(self):
if len(self.children) > 1:
return operations[self.op](self.children[0].compile(), self.children[1].compile())
else:
return operations[self.op](0, self.children[0].compile())
# Node of the colors
@addToClass(AST.ColorNode)
def compile(self):
colorArray = []
r = self.children[0].compile()
g = self.children[1].compile()
b = self.children[2].compile()
colorArray.append(JSColor %(r, g, b))
colorArray.append(JSColorObject %(r, g, b))
return colorArray
# Node of the circles
@addToClass(AST.CircleNode)
def compile(self):
# Init
global JSInit
global JSDraw
circleArray = []
# Get compiled values
point = self.children[0].compile()[0]
radius = self.children[1].compile()
color = self.children[2].compile()
around = JSPointObject %(0, 0)
# Create object
circleObject = JSCircleObject %(point, radius, color[1], 0, around)
# Generate shape var name
shapeName = "bbcShape" + str(nextShapeNum())
# Create js code
jscode = color[0]
jscode += JSCircle %(shapeName + ".around.x", shapeName + ".around.y", shapeName + ".rotation", shapeName + ".around.x", shapeName + ".around.y", shapeName + ".point.x", shapeName + ".point.y", shapeName + ".radius")
JSDraw += jscode
# Create the array
circleArray.append(jscode)
circleArray.append(shapeName)
JSInit += JSAssign %(shapeName, circleObject)
return circleArray
# Node of the rectangles
@addToClass(AST.RectNode)
def compile(self):
# Init
global JSInit
global JSDraw
rectArray = []
# Get compiled values
point = self.children[0].compile()[0]
size = self.children[1].compile()
color = self.children[2].compile()
around = JSPointObject %(0, 0)
# Create object
rectObject = JSRectObject %(point, size, color[1], 0, around)
# Generate shape var name
shapeName = "bbcShape" + str(nextShapeNum())
# Create js code
jscode = color[0]
jscode += JSRect %(shapeName + ".around.x", shapeName + ".around.y", shapeName + ".rotation", shapeName + ".around.x", shapeName + ".around.y", shapeName + ".point.x", shapeName + ".point.y", shapeName + ".size.width", shapeName + ".size.height")
JSDraw += jscode
# Create the array
rectArray.append(jscode)
rectArray.append(shapeName)
JSInit += JSAssign %(shapeName, rectObject)
return rectArray
# Node of the points list for polygons
@addToClass(AST.LinkedPointNode)
def compile(self):
points = []
for c in self.children:
points.append(c.compile())
return points
# Node of the polygons
@addToClass(AST.PolygonNode)
def compile(self):
# Init
global JSInit
global JSDraw
polygonArray = []
# Get compiled values
ref_point = self.children[0].compile()
ref_point_JS = JSPointObject %(ref_point[1][0], ref_point[1][1])
points = self.children[1].compile()
color = self.children[2].compile()
points_for_JS = [point[1] for point in points]
for i in range(0, len(points_for_JS)):
array = []
array.append(points_for_JS[i][0])
array.append(points_for_JS[i][1])
points_for_JS[i] = array
around = JSPointObject %(0, 0)
# Create object
polygonObject = JSPolygonObject %(ref_point_JS, points_for_JS, color[1], 0, around)
# Generate shape var name
shapeName = "bbcShape" + str(nextShapeNum())
# Create js code
jscode = color[0]
jspoints = (JSMoveTo %(shapeName + ".point.x", shapeName + ".point.y")).rstrip("\r\n")
for i in range(0, len(points)):
jspoints += (JSLineTo %(shapeName + ".point.x + " + shapeName + ".points[" + str(i) + "][0]", shapeName + ".point.y + " + shapeName + ".points[" + str(i) + "][1]")).rstrip("\r\n")
jscode += JSPolygon %(shapeName + ".around.x", shapeName + ".around.y", shapeName + ".rotation", shapeName + ".around.x", shapeName + ".around.y", jspoints)
JSDraw += jscode
# Create the array
polygonArray.append(jscode)
polygonArray.append(shapeName)
JSInit += JSAssign %(shapeName, polygonObject)
return polygonArray
# Node of the points
@addToClass(AST.PointNode)
def compile(self):
pointArray = []
jscode = JSPointObject %(self.children[0].compile(), self.children[1].compile())
values = (self.children[0].compile(), self.children[1].compile())
pointArray.append(jscode)
pointArray.append(values)
return pointArray
# Node of the size element
@addToClass(AST.SizeNode)
def compile(self):
return JSSizeObject %(self.children[0].compile(), self.children[1].compile())
# Node of the translate animation
@addToClass(AST.TranslateNode)
def compile(self):
global JSUpdate
identifier = self.children[0].compile()
if isinstance(identifier, list):
identifier = identifier[1]
translatePoint = self.children[1].compile()[1]
JSUpdate += JSTranslate %(identifier, translatePoint[0], identifier, translatePoint[1])
# Node of the rotation animation
@addToClass(AST.RotateNode)
def compile(self):
global JSUpdate
identifier = self.children[0].compile()
if isinstance(identifier, list):
identifier = identifier[1]
rotation = self.children[1].compile()
translatePoint = self.children[2].compile()[1]
JSUpdate += JSRotate %(identifier + ".rotation", rotation, identifier, translatePoint[0], identifier, translatePoint[1])
# Node of the random number generator
@addToClass(AST.RandomNode)
def compile(self):
min = 0
max = self.children[0].compile()
if len(self.children) > 1:
min = max
max = self.children[1].compile()
return random.randint(min, max)
# Entry of the program
if __name__ == "__main__":
from parser5 import parse
import sys, os
random.seed()
jsPath = os.path.splitext(sys.argv[1])[0]
HTMLName = os.path.splitext(sys.argv[1])[0]+'.html'
outfile = open(HTMLName, 'w')
outfile.write(HTMLContent %(jsPath, jsPath))
prog = open(sys.argv[1]).read()
ast = parse(prog)
compiled = ast.compile()
JSName = os.path.splitext(sys.argv[1])[0]+'.js'
outfile = open(JSName, 'w')
outfile.write(compiled)
outfile.close()
print ("Wrote output to", JSName, "and", HTMLName)