def draw(self, drawing, canvas, x=0, y=0, showBoundary=rl_config._unset_):
"""This is the top level function, which draws the drawing at the given
location. The recursive part is handled by drawNode."""
self._tracker = StateTracker(defaultObj=drawing)
#stash references for ease of communication
if showBoundary is rl_config._unset_:
showBoundary = rl_config.showBoundary
self._canvas = canvas
canvas.__dict__['_drawing'] = self._drawing = drawing
drawing._parent = None
try:
#bounding box
if showBoundary: canvas.rect(x, y, drawing.width, drawing.height)
canvas.saveState()
self.initState(x, y) #this is the push()
self.drawNode(drawing)
self.pop()
canvas.restoreState()
finally:
#remove any circular references
try:
del self._canvas, self._drawing, canvas._drawing, drawing._parent, self._tracker
except:
pass
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
class _SVGRenderer(Renderer):
"""This draws onto an SVG document.
"""
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
def drawNode(self, node):
"""This is the recursive method called for each node in the tree.
"""
if self.verbose:
print "### begin _SVGRenderer.drawNode"
self._canvas.comment("begin node %s" % ` node `)
color = self._canvas._color
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.saveState()
# apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
# draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.restoreState()
self._canvas.comment("end node %s" % ` node `)
self._canvas._color = color
# restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if self._restores.has_key(k):
setattr(self._canvas, self._restores[k], v)
if self.verbose:
print "### end _SVGRenderer.drawNode"
_restores = {
"strokeColor": "_strokeColor",
"strokeWidth": "_lineWidth",
"strokeLineCap": "_lineCap",
"strokeLineJoin": "_lineJoin",
"fillColor": "_fillColor",
"fontName": "_font",
"fontSize": "_fontSize",
}
def drawGroup(self, group):
if self.verbose:
print "### begin _SVGRenderer.drawGroup"
currGroup = self._canvas.startGroup()
a, b, c, d, e, f = self._tracker.getCTM()
for childNode in group.getContents():
if isinstance(childNode, UserNode):
node2 = childNode.provideNode()
else:
node2 = childNode
self.drawNode(node2)
self._canvas.transform(a, b, c, d, e, f)
self._canvas.endGroup(currGroup)
if self.verbose:
print "### end _SVGRenderer.drawGroup"
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
# plain old rectangle
self._canvas.rect(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height)
else:
# cheat and assume ry = rx; better to generalize
# pdfgen roundRect function. TODO
self._canvas.roundRect(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height, rect.rx, rect.ry)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S["textAnchor"], stringObj.x, stringObj.y, stringObj.text
if not text_anchor in ["start", "inherited"]:
font, fontSize = S["fontName"], S["fontSize"]
textLen = stringWidth(text, font, fontSize)
if text_anchor == "end":
x = x - textLen
elif text_anchor == "middle":
x = x - textLen / 2
else:
raise ValueError, "bad value for text_anchor " + str(text_anchor)
self._canvas.drawString(text, x, y)
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle(circle.cx, circle.cy, circle.r)
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = (
wedge.centerx,
wedge.centery,
wedge.radius,
wedge.startangledegrees,
wedge.endangledegrees,
)
yradius = wedge.yradius or wedge.radius
(x1, y1) = (centerx - radius, centery - yradius)
(x2, y2) = (centerx + radius, centery + yradius)
extent = endangledegrees - startangledegrees
self._canvas.drawArc(x1, y1, x2, y2, startangledegrees, extent, fromcenter=1)
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
# need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1, y1, x2, y2)
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1)
def drawPath(self, path):
# print "### drawPath", path.points
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if not isClosed:
c._fillColor = None
c._fillAndStroke([], clip=path.isClipPath)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == "transform":
pass
# self._canvas.transform(value[0], value[1], value[2], value[3], value[4], value[5])
elif key == "strokeColor":
self._canvas.setStrokeColor(value)
elif key == "strokeWidth":
self._canvas.setLineWidth(value)
elif key == "strokeLineCap": # 0,1,2
self._canvas.setLineCap(value)
elif key == "strokeLineJoin":
self._canvas.setLineJoin(value)
elif key == "strokeDashArray":
if value:
self._canvas.setDash(value)
else:
self._canvas.setDash()
elif key == "fillColor":
self._canvas.setFillColor(value)
elif key in ["fontSize", "fontName"]:
fontname = delta.get("fontName", self._canvas._font)
fontsize = delta.get("fontSize", self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def __init__(self):
self._tracker = StateTracker()
class _PSRenderer(Renderer):
"""This draws onto a EPS document. It needs to be a class
rather than a function, as some EPS-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._tracker = StateTracker()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
self._canvas.comment('begin node %r'%node)
color = self._canvas._color
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.restoreState()
self._canvas.comment('end node %r'%node)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if k in self._restores:
setattr(self._canvas,self._restores[k],v)
## _restores = {'stroke':'_stroke','stroke_width': '_lineWidth','stroke_linecap':'_lineCap',
## 'stroke_linejoin':'_lineJoin','fill':'_fill','font_family':'_font',
## 'font_size':'_fontSize'}
_restores = {'strokeColor':'_strokeColor','strokeWidth': '_lineWidth','strokeLineCap':'_lineCap',
'strokeLineJoin':'_lineJoin','fillColor':'_fillColor','fontName':'_font',
'fontSize':'_fontSize'}
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height, rect.rx, rect.ry
)
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle( circle.cx, circle.cy, circle.r)
def drawWedge(self, wedge):
yradius, radius1, yradius1 = wedge._xtraRadii()
if (radius1==0 or radius1 is None) and (yradius1==0 or yradius1 is None):
startangledegrees = wedge.startangledegrees
endangledegrees = wedge.endangledegrees
centerx= wedge.centerx
centery = wedge.centery
radius = wedge.radius
extent = endangledegrees - startangledegrees
self._canvas.drawArc(centerx-radius, centery-yradius, centerx+radius, centery+yradius,
startangledegrees, extent, fromcenter=1)
else:
self.drawPolygon(wedge.asPolygon())
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,y1,x2,y2)
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S['textAnchor'], stringObj.x,stringObj.y,stringObj.text
if not text_anchor in ['start','inherited']:
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,font,fontSize,encoding='winansi')
else:
raise ValueError, 'bad value for text_anchor '+str(text_anchor)
self._canvas.drawString(x,y,text)
def drawPath(self, path):
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if not isClosed:
c._fillColor = None
c._fillAndStroke([], clip=path.isClipPath)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
self._canvas.transform(value[0], value[1], value[2],
value[3], value[4], value[5])
elif key == 'strokeColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
self._canvas.setDash(value)
else:
self._canvas.setDash()
## elif key == 'stroke_opacity':
## warnOnce('Stroke Opacity not supported yet')
elif key == 'fillColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setFillColor(value)
## elif key == 'fill_rule':
## warnOnce('Fill rules not done yet')
## elif key == 'fill_opacity':
## warnOnce('Fill opacity not done yet')
elif key in ['fontSize', 'fontName']:
# both need setting together in PDF
# one or both might be in the deltas,
# so need to get whichever is missing
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def drawImage(self, image):
from reportlab.lib.utils import ImageReader
im = ImageReader(image.path)
x0 = image.x
y0 = image.y
x1 = image.width
if x1 is not None: x1 += x0
y1 = image.height
if y1 is not None: y1 += y0
self._canvas.drawImage(im._image,x0,y0,x1,y1)
class _PMRenderer(Renderer):
"""This draws onto a pix map image. It needs to be a class
rather than a function, as some image-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._tracker = StateTracker()
def pop(self):
self._tracker.pop()
self.applyState()
def push(self,node):
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyState()
def applyState(self):
s = self._tracker.getState()
self._canvas.ctm = s['ctm']
self._canvas.strokeWidth = s['strokeWidth']
alpha = s['strokeOpacity']
if alpha is not None:
self._canvas.strokeOpacity = alpha
self._canvas.setStrokeColor(s['strokeColor'])
self._canvas.lineCap = s['strokeLineCap']
self._canvas.lineJoin = s['strokeLineJoin']
da = s['strokeDashArray']
da = da and (0,da) or None
self._canvas.dashArray = da
alpha = s['fillOpacity']
if alpha is not None:
self._canvas.fillOpacity = alpha
self._canvas.setFillColor(s['fillColor'])
self._canvas.setFont(s['fontName'], s['fontSize'])
def initState(self,x,y):
deltas = STATE_DEFAULTS.copy()
deltas['transform'] = self._canvas._baseCTM[0:4]+(x,y)
self._tracker.push(deltas)
self.applyState()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
#apply state changes
self.push(node)
#draw the object, or recurse
self.drawNodeDispatcher(node)
# restore the state
self.pop()
def drawRect(self, rect):
c = self._canvas
if rect.rx == rect.ry == 0:
#plain old rectangle, draw clockwise (x-axis to y-axis) direction
c.rect(rect.x,rect.y, rect.width, rect.height)
else:
c.roundRect(rect.x,rect.y, rect.width, rect.height, rect.rx, rect.ry)
def drawLine(self, line):
self._canvas.line(line.x1,line.y1,line.x2,line.y2)
def drawImage(self, image):
if image.path and os.path.exists(image.path):
if type(image.path) is type(''):
im = _getImage().open(image.path).convert('RGB')
else:
im = image.path.convert('RGB')
srcW, srcH = im.size
dstW, dstH = image.width, image.height
if dstW is None: dstW = srcW
if dstH is None: dstH = srcH
self._canvas._aapixbuf(
image.x, image.y, dstW, dstH,
im.tostring(), srcW, srcH, 3,
)
def drawCircle(self, circle):
c = self._canvas
c.circle(circle.cx,circle.cy, circle.r)
c.fillstrokepath()
def drawPolyLine(self, polyline, _doClose=0):
P = polyline.points
assert len(P) >= 2, 'Polyline must have 1 or more points'
c = self._canvas
c.pathBegin()
c.moveTo(P[0], P[1])
for i in range(2, len(P), 2):
c.lineTo(P[i], P[i+1])
if _doClose:
c.pathClose()
c.pathFill()
c.pathStroke()
def drawEllipse(self, ellipse):
c=self._canvas
c.ellipse(ellipse.cx, ellipse.cy, ellipse.rx,ellipse.ry)
c.fillstrokepath()
def drawPolygon(self, polygon):
self.drawPolyLine(polygon,_doClose=1)
def drawString(self, stringObj):
canv = self._canvas
fill = canv.fillColor
if fill is not None:
S = self._tracker.getState()
text_anchor = S['textAnchor']
fontName = S['fontName']
fontSize = S['fontSize']
text = stringObj.text
x = stringObj.x
y = stringObj.y
if not text_anchor in ['start','inherited']:
textLen = stringWidth(text, fontName,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,fontName,fontSize,stringObj.encoding)
else:
raise ValueError, 'bad value for textAnchor '+str(text_anchor)
canv.drawString(x,y,text,_fontInfo=(fontName,fontSize))
def drawPath(self, path):
c = self._canvas
if path is EmptyClipPath:
del c._clipPaths[-1]
if c._clipPaths:
P = c._clipPaths[-1]
icp = P.isClipPath
P.isClipPath = 1
self.drawPath(P)
P.isClipPath = icp
else:
c.clipPathClear()
return
c.pathBegin()
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.pathClose)
from reportlab.graphics.shapes import _renderPath
isClosed = _renderPath(path, drawFuncs)
if path.isClipPath:
c.clipPathSet()
c._clipPaths.append(path)
else:
if isClosed: c.pathFill()
c.pathStroke()
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
class _SVGRenderer(Renderer):
"""This draws onto an SVG document.
"""
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
def drawNode(self, node):
"""This is the recursive method called for each node in the tree.
"""
if self.verbose: print "### begin _SVGRenderer.drawNode(%r)" % node
self._canvas.comment('begin node %r'%node)
color = self._canvas._color
style = self._canvas.style.copy()
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
pass #self._canvas.restoreState()
self._canvas.comment('end node %r'%node)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if k in self._restores:
setattr(self._canvas,self._restores[k],v)
self._canvas.style = style
if self.verbose: print "### end _SVGRenderer.drawNode(%r)" % node
_restores = {'strokeColor':'_strokeColor','strokeWidth': '_lineWidth','strokeLineCap':'_lineCap',
'strokeLineJoin':'_lineJoin','fillColor':'_fillColor','fontName':'_font',
'fontSize':'_fontSize'}
def _get_link_info_dict(self, obj):
#We do not want None or False as the link, even if it is the
#attribute's value - use the empty string instead.
url = getattr(obj, "hrefURL", "") or ""
title = getattr(obj, "hrefTitle", "") or ""
if url :
#Is it valid to have a link with no href? The XML requires
#the xlink:href to be present, but you might just want a
#tool tip shown (via the xlink:title attribute). Note that
#giving an href of "" is equivalent to "the current page"
#(a relative link saying go nowhere).
return {"xlink:href":url, "xlink:title":title, "target":"_top"}
#Currently of all the mainstream browsers I have tested, only Safari/webkit
#will show SVG images embedded in HTML using a simple <img src="..." /> tag.
#However, the links don't work (Safari 3.2.1 on the Mac).
#
#Therefore I use the following, which also works for Firefox, Opera, and
#IE 6.0 with Adobe SVG Viewer 6 beta:
#<object data="..." type="image/svg+xml" width="430" height="150" class="img">
#
#Once displayed, Firefox and Safari treat the SVG like a frame, and
#by default clicking on links acts "in frame" and replaces the image.
#Opera does what I expect, and replaces the whole page with the link.
#
#Therefore I use target="_top" to force the links to replace the whole page.
#This now works as expected on Safari 3.2.1, Firefox 3.0.6, Opera 9.20.
#Perhaps the target attribute should be an option, perhaps defaulting to
#"_top" as used here?
else :
return None
def drawGroup(self, group):
if self.verbose: print "### begin _SVGRenderer.drawGroup"
currGroup = self._canvas.startGroup()
a, b, c, d, e, f = self._tracker.getState()['transform']
for childNode in group.getContents():
if isinstance(childNode, UserNode):
node2 = childNode.provideNode()
else:
node2 = childNode
self.drawNode(node2)
self._canvas.transform(a, b, c, d, e, f)
self._canvas.endGroup(currGroup)
if self.verbose: print "### end _SVGRenderer.drawGroup"
def drawRect(self, rect):
link_info = self._get_link_info_dict(rect)
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height, link_info=link_info)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height,
rect.rx, rect.ry,
link_info=link_info)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S['textAnchor'], stringObj.x, stringObj.y, stringObj.text
if not text_anchor in ('start', 'inherited'):
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,font,fontSize)
else:
raise ValueError, 'bad value for text_anchor ' + str(text_anchor)
self._canvas.drawString(text,x,y,link_info=self._get_link_info_dict(stringObj))
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle( circle.cx, circle.cy, circle.r, link_info=self._get_link_info_dict(circle))
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = \
wedge.centerx, wedge.centery, wedge.radius, wedge.startangledegrees, wedge.endangledegrees
yradius = wedge.yradius or wedge.radius
(x1, y1) = (centerx-radius, centery-yradius)
(x2, y2) = (centerx+radius, centery+yradius)
extent = endangledegrees - startangledegrees
self._canvas.drawArc(x1, y1, x2, y2, startangledegrees, extent, fromcenter=1)
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,y1,x2,y2, link_info=self._get_link_info_dict(ellipse))
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1, link_info=self._get_link_info_dict(p))
def drawPath(self, path):
# print "### drawPath", path.points
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if isClosed:
#Only try and add links to closed paths...
link_info = self._get_link_info_dict(path)
else :
c._fillColor = None
link_info = None
c._fillAndStroke([], clip=path.isClipPath, link_info=link_info)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
pass
#self._canvas.transform(value[0], value[1], value[2], value[3], value[4], value[5])
elif key == 'strokeColor':
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
if isinstance(value,(list,tuple)) and len(value)==2 and isinstance(value[1],(tuple,list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value,phase)
else:
self._canvas.setDash()
elif key == 'fillColor':
self._canvas.setFillColor(value)
elif key in ['fontSize', 'fontName']:
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def __init__(self):
self._tracker = StateTracker()
class _PSRenderer(Renderer):
"""This draws onto a EPS document. It needs to be a class
rather than a function, as some EPS-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._tracker = StateTracker()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
self._canvas.comment('begin node %r' % node)
color = self._canvas._color
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.restoreState()
self._canvas.comment('end node %r' % node)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if k in self._restores:
setattr(self._canvas, self._restores[k], v)
## _restores = {'stroke':'_stroke','stroke_width': '_lineWidth','stroke_linecap':'_lineCap',
## 'stroke_linejoin':'_lineJoin','fill':'_fill','font_family':'_font',
## 'font_size':'_fontSize'}
_restores = {
'strokeColor': '_strokeColor',
'strokeWidth': '_lineWidth',
'strokeLineCap': '_lineCap',
'strokeLineJoin': '_lineJoin',
'fillColor': '_fillColor',
'fontName': '_font',
'fontSize': '_fontSize'
}
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(rect.x, rect.y, rect.x + rect.width,
rect.y + rect.height)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(rect.x, rect.y, rect.x + rect.width,
rect.y + rect.height, rect.rx, rect.ry)
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle(circle.cx, circle.cy, circle.r)
def drawWedge(self, wedge):
yradius, radius1, yradius1 = wedge._xtraRadii()
if (radius1 == 0 or radius1 is None) and (yradius1 == 0
or yradius1 is None):
startangledegrees = wedge.startangledegrees
endangledegrees = wedge.endangledegrees
centerx = wedge.centerx
centery = wedge.centery
radius = wedge.radius
extent = endangledegrees - startangledegrees
self._canvas.drawArc(centerx - radius,
centery - yradius,
centerx + radius,
centery + yradius,
startangledegrees,
extent,
fromcenter=1)
else:
self.drawPolygon(wedge.asPolygon())
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1, y1, x2, y2)
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S[
'textAnchor'], stringObj.x, stringObj.y, stringObj.text
if not text_anchor in ['start', 'inherited']:
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font, fontSize)
if text_anchor == 'end':
x -= textLen
elif text_anchor == 'middle':
x -= textLen / 2
elif text_anchor == 'numeric':
x -= numericXShift(text_anchor,
text,
textLen,
font,
fontSize,
encoding='winansi')
else:
raise ValueError('bad value for text_anchor ' +
str(text_anchor))
self._canvas.drawString(x, y, text)
def drawPath(self, path):
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if not isClosed:
c._fillColor = None
c._fillAndStroke([], clip=path.isClipPath)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
self._canvas.transform(value[0], value[1], value[2], value[3],
value[4], value[5])
elif key == 'strokeColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
if isinstance(
value,
(list, tuple)) and len(value) == 2 and isinstance(
value[1], (tuple, list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value, phase)
else:
self._canvas.setDash()
## elif key == 'stroke_opacity':
## warnOnce('Stroke Opacity not supported yet')
elif key == 'fillColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
self._canvas.setFillColor(value)
## elif key == 'fill_rule':
## warnOnce('Fill rules not done yet')
## elif key == 'fill_opacity':
## warnOnce('Fill opacity not done yet')
elif key in ['fontSize', 'fontName']:
# both need setting together in PDF
# one or both might be in the deltas,
# so need to get whichever is missing
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def drawImage(self, image):
from reportlab.lib.utils import ImageReader
im = ImageReader(image.path)
x0 = image.x
y0 = image.y
x1 = image.width
if x1 is not None: x1 += x0
y1 = image.height
if y1 is not None: y1 += y0
self._canvas.drawImage(im._image, x0, y0, x1, y1)
class _SVGRenderer(Renderer):
"""This draws onto an SVG document.
"""
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
def drawNode(self, node):
"""This is the recursive method called for each node in the tree.
"""
if self.verbose: print("### begin _SVGRenderer.drawNode(%r)" % node)
self._canvas.comment('begin node %r' % node)
color = self._canvas._color
style = self._canvas.style.copy()
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
pass #self._canvas.restoreState()
self._canvas.comment('end node %r' % node)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if k in self._restores:
setattr(self._canvas, self._restores[k], v)
self._canvas.style = style
if self.verbose: print("### end _SVGRenderer.drawNode(%r)" % node)
_restores = {
'strokeColor': '_strokeColor',
'strokeWidth': '_lineWidth',
'strokeLineCap': '_lineCap',
'strokeLineJoin': '_lineJoin',
'fillColor': '_fillColor',
'fontName': '_font',
'fontSize': '_fontSize'
}
def _get_link_info_dict(self, obj):
#We do not want None or False as the link, even if it is the
#attribute's value - use the empty string instead.
url = getattr(obj, "hrefURL", "") or ""
title = getattr(obj, "hrefTitle", "") or ""
if url:
#Is it valid to have a link with no href? The XML requires
#the xlink:href to be present, but you might just want a
#tool tip shown (via the xlink:title attribute). Note that
#giving an href of "" is equivalent to "the current page"
#(a relative link saying go nowhere).
return {"xlink:href": url, "xlink:title": title, "target": "_top"}
#Currently of all the mainstream browsers I have tested, only Safari/webkit
#will show SVG images embedded in HTML using a simple <img src="..." /> tag.
#However, the links don't work (Safari 3.2.1 on the Mac).
#
#Therefore I use the following, which also works for Firefox, Opera, and
#IE 6.0 with Adobe SVG Viewer 6 beta:
#<object data="..." type="image/svg+xml" width="430" height="150" class="img">
#
#Once displayed, Firefox and Safari treat the SVG like a frame, and
#by default clicking on links acts "in frame" and replaces the image.
#Opera does what I expect, and replaces the whole page with the link.
#
#Therefore I use target="_top" to force the links to replace the whole page.
#This now works as expected on Safari 3.2.1, Firefox 3.0.6, Opera 9.20.
#Perhaps the target attribute should be an option, perhaps defaulting to
#"_top" as used here?
else:
return None
def drawGroup(self, group):
if self.verbose: print("### begin _SVGRenderer.drawGroup")
currGroup = self._canvas.startGroup()
a, b, c, d, e, f = self._tracker.getState()['transform']
for childNode in group.getContents():
if isinstance(childNode, UserNode):
node2 = childNode.provideNode()
else:
node2 = childNode
self.drawNode(node2)
self._canvas.transform(a, b, c, d, e, f)
self._canvas.endGroup(currGroup)
if self.verbose: print("### end _SVGRenderer.drawGroup")
def drawRect(self, rect):
link_info = self._get_link_info_dict(rect)
svgAttrs = getattr(rect, '_svgAttrs', {})
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(rect.x,
rect.y,
rect.x + rect.width,
rect.y + rect.height,
link_info=link_info,
**svgAttrs)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(rect.x,
rect.y,
rect.x + rect.width,
rect.y + rect.height,
rect.rx,
rect.ry,
link_info=link_info,
**svgAttrs)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S[
'textAnchor'], stringObj.x, stringObj.y, stringObj.text
if not text_anchor in ('start', 'inherited'):
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font, fontSize)
if text_anchor == 'end':
x -= textLen
elif text_anchor == 'middle':
x -= textLen / 2
elif text_anchor == 'numeric':
x -= numericXShift(text_anchor, text, textLen, font,
fontSize)
else:
raise ValueError('bad value for text_anchor ' +
str(text_anchor))
self._canvas.drawString(
text,
x,
y,
link_info=self._get_link_info_dict(stringObj),
**getattr(stringObj, '_svgAttrs', {}))
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle(circle.cx,
circle.cy,
circle.r,
link_info=self._get_link_info_dict(circle))
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = \
wedge.centerx, wedge.centery, wedge.radius, wedge.startangledegrees, wedge.endangledegrees
yradius = wedge.yradius or wedge.radius
(x1, y1) = (centerx - radius, centery - yradius)
(x2, y2) = (centerx + radius, centery + yradius)
extent = endangledegrees - startangledegrees
self._canvas.drawArc(x1,
y1,
x2,
y2,
startangledegrees,
extent,
fromcenter=1)
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,
y1,
x2,
y2,
link_info=self._get_link_info_dict(ellipse))
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points),
closed=1,
link_info=self._get_link_info_dict(p))
def drawPath(self, path):
# print "### drawPath", path.points
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if isClosed:
#Only try and add links to closed paths...
link_info = self._get_link_info_dict(path)
else:
c._fillColor = None
link_info = None
c._fillAndStroke([], clip=path.isClipPath, link_info=link_info)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
pass
#self._canvas.transform(value[0], value[1], value[2], value[3], value[4], value[5])
elif key == 'strokeColor':
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
if isinstance(
value,
(list, tuple)) and len(value) == 2 and isinstance(
value[1], (tuple, list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value, phase)
else:
self._canvas.setDash()
elif key == 'fillColor':
self._canvas.setFillColor(value)
elif key in ['fontSize', 'fontName']:
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
def __init__(self):
self._stroke = 0
self._fill = 0
self._tracker = StateTracker()
class _PDFRenderer(Renderer):
"""This draws onto a PDF document. It needs to be a class
rather than a function, as some PDF-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._stroke = 0
self._fill = 0
self._tracker = StateTracker()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
#print "pdf:drawNode", self
#if node.__class__ is Wedge: stop
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.restoreState()
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(rect.x,
rect.y,
rect.width,
rect.height,
stroke=self._stroke,
fill=self._fill)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(rect.x,
rect.y,
rect.width,
rect.height,
rect.rx,
fill=self._fill,
stroke=self._stroke)
def drawImage(self, image):
path = image.path
# currently not implemented in other renderers
if path and (hasattr(path, 'mode') or os.path.exists(image.path)):
self._canvas.drawInlineImage(path, image.x, image.y, image.width,
image.height)
def drawLine(self, line):
if self._stroke:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle(circle.cx,
circle.cy,
circle.r,
fill=self._fill,
stroke=self._stroke)
def drawPolyLine(self, polyline):
if self._stroke:
assert len(
polyline.points) >= 2, 'Polyline must have 2 or more points'
head, tail = polyline.points[0:2], polyline.points[2:],
path = self._canvas.beginPath()
path.moveTo(head[0], head[1])
for i in range(0, len(tail), 2):
path.lineTo(tail[i], tail[i + 1])
self._canvas.drawPath(path)
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = \
wedge.centerx, wedge.centery, wedge.radius, wedge.startangledegrees, wedge.endangledegrees
yradius, radius1, yradius1 = wedge._xtraRadii()
if yradius is None: yradius = radius
angle = endangledegrees - startangledegrees
path = self._canvas.beginPath()
if (radius1 == 0 or radius1 is None) and (yradius1 == 0
or yradius1 is None):
path.moveTo(centerx, centery)
path.arcTo(centerx - radius, centery - yradius, centerx + radius,
centery + yradius, startangledegrees, angle)
else:
path.arc(centerx - radius, centery - yradius, centerx + radius,
centery + yradius, startangledegrees, angle)
path.arcTo(centerx - radius1, centery - yradius1,
centerx + radius1, centery + yradius1, endangledegrees,
-angle)
path.close()
self._canvas.drawPath(path, fill=self._fill, stroke=self._stroke)
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,
y1,
x2,
y2,
fill=self._fill,
stroke=self._stroke)
def drawPolygon(self, polygon):
assert len(polygon.points) >= 2, 'Polyline must have 2 or more points'
head, tail = polygon.points[0:2], polygon.points[2:],
path = self._canvas.beginPath()
path.moveTo(head[0], head[1])
for i in range(0, len(tail), 2):
path.lineTo(tail[i], tail[i + 1])
path.close()
self._canvas.drawPath(path, stroke=self._stroke, fill=self._fill)
def drawString(self, stringObj):
if self._fill:
S = self._tracker.getState()
text_anchor, x, y, text, enc = S[
'textAnchor'], stringObj.x, stringObj.y, stringObj.text, stringObj.encoding
if not text_anchor in ['start', 'inherited']:
font, font_size = S['fontName'], S['fontSize']
textLen = stringWidth(text, font, font_size, enc)
if text_anchor == 'end':
x -= textLen
elif text_anchor == 'middle':
x -= textLen * 0.5
elif text_anchor == 'numeric':
x -= numericXShift(text_anchor, text, textLen, font,
font_size, enc)
else:
raise ValueError('bad value for textAnchor ' +
str(text_anchor))
t = self._canvas.beginText(x, y)
t.textLine(text)
self._canvas.drawText(t)
def drawPath(self, path):
from reportlab.graphics.shapes import _renderPath
pdfPath = self._canvas.beginPath()
drawFuncs = (pdfPath.moveTo, pdfPath.lineTo, pdfPath.curveTo,
pdfPath.close)
isClosed = _renderPath(path, drawFuncs)
if isClosed:
fill = self._fill
else:
fill = 0
if path.isClipPath:
self._canvas.clipPath(pdfPath, fill=fill, stroke=self._stroke)
else:
self._canvas.drawPath(pdfPath, fill=fill, stroke=self._stroke)
def setStrokeColor(self, c):
self._canvas.setStrokeColor(c)
def setFillColor(self, c):
self._canvas.setFillColor(c)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the PDF operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
self._canvas.transform(value[0], value[1], value[2], value[3],
value[4], value[5])
elif key == 'strokeColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
if value is None:
self._stroke = 0
else:
self._stroke = 1
self.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
# elif key == 'stroke_dasharray':
# self._canvas.setDash(array=value)
elif key == 'strokeDashArray':
if value:
if isinstance(
value,
(list, tuple)) and len(value) == 2 and isinstance(
value[1], (tuple, list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value, phase)
else:
self._canvas.setDash()
elif key == 'fillColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
if value is None:
self._fill = 0
else:
self._fill = 1
self.setFillColor(value)
elif key in ['fontSize', 'fontName']:
# both need setting together in PDF
# one or both might be in the deltas,
# so need to get whichever is missing
fontname = delta.get('fontName', self._canvas._fontname)
fontsize = delta.get('fontSize', self._canvas._fontsize)
self._canvas.setFont(fontname, fontsize)
elif key == 'fillOpacity':
if value is not None:
self._canvas.setFillAlpha(value)
elif key == 'strokeOpacity':
if value is not None:
self._canvas.setStrokeAlpha(value)
elif key == 'fillOverprint':
self._canvas.setFillOverprint(value)
elif key == 'strokeOverprint':
self._canvas.setStrokeOverprint(value)
elif key == 'overprintMask':
self._canvas.setOverprintMask(value)
class _PMRenderer(Renderer):
"""This draws onto a pix map image. It needs to be a class
rather than a function, as some image-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._tracker = StateTracker()
def pop(self):
self._tracker.pop()
self.applyState()
def push(self,node):
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyState()
def applyState(self):
s = self._tracker.getState()
self._canvas.ctm = s['ctm']
self._canvas.strokeWidth = s['strokeWidth']
alpha = s['strokeOpacity']
if alpha is not None:
self._canvas.strokeOpacity = alpha
self._canvas.setStrokeColor(s['strokeColor'])
self._canvas.lineCap = s['strokeLineCap']
self._canvas.lineJoin = s['strokeLineJoin']
da = s['strokeDashArray']
da = da and (0,da) or None
self._canvas.dashArray = da
alpha = s['fillOpacity']
if alpha is not None:
self._canvas.fillOpacity = alpha
self._canvas.setFillColor(s['fillColor'])
self._canvas.setFont(s['fontName'], s['fontSize'])
def initState(self,x,y):
deltas = STATE_DEFAULTS.copy()
deltas['transform'] = self._canvas._baseCTM[0:4]+(x,y)
self._tracker.push(deltas)
self.applyState()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
#apply state changes
self.push(node)
#draw the object, or recurse
self.drawNodeDispatcher(node)
# restore the state
self.pop()
def drawRect(self, rect):
c = self._canvas
if rect.rx == rect.ry == 0:
#plain old rectangle, draw clockwise (x-axis to y-axis) direction
c.rect(rect.x,rect.y, rect.width, rect.height)
else:
c.roundRect(rect.x,rect.y, rect.width, rect.height, rect.rx, rect.ry)
def drawLine(self, line):
self._canvas.line(line.x1,line.y1,line.x2,line.y2)
def drawImage(self, image):
if image.path and os.path.exists(image.path):
if type(image.path) is type(''):
im = _getImage().open(image.path).convert('RGB')
else:
im = image.path.convert('RGB')
srcW, srcH = im.size
dstW, dstH = image.width, image.height
if dstW is None: dstW = srcW
if dstH is None: dstH = srcH
self._canvas._aapixbuf(
image.x, image.y, dstW, dstH,
im.tostring(), srcW, srcH, 3,
)
def drawCircle(self, circle):
c = self._canvas
c.circle(circle.cx,circle.cy, circle.r)
c.fillstrokepath()
def drawPolyLine(self, polyline, _doClose=0):
P = polyline.points
assert len(P) >= 2, 'Polyline must have 1 or more points'
c = self._canvas
c.pathBegin()
c.moveTo(P[0], P[1])
for i in range(2, len(P), 2):
c.lineTo(P[i], P[i+1])
if _doClose:
c.pathClose()
c.pathFill()
c.pathStroke()
def drawEllipse(self, ellipse):
c=self._canvas
c.ellipse(ellipse.cx, ellipse.cy, ellipse.rx,ellipse.ry)
c.fillstrokepath()
def drawPolygon(self, polygon):
self.drawPolyLine(polygon,_doClose=1)
def drawString(self, stringObj):
canv = self._canvas
fill = canv.fillColor
if fill is not None:
S = self._tracker.getState()
text_anchor = S['textAnchor']
fontName = S['fontName']
fontSize = S['fontSize']
text = stringObj.text
x = stringObj.x
y = stringObj.y
if not text_anchor in ['start','inherited']:
textLen = stringWidth(text, fontName,fontSize)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen/2
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,fontName,fontSize,stringObj.encoding)
else:
raise ValueError, 'bad value for textAnchor '+str(text_anchor)
canv.drawString(x,y,text,_fontInfo=(fontName,fontSize))
def drawPath(self, path):
c = self._canvas
if path is EmptyClipPath:
del c._clipPaths[-1]
if c._clipPaths:
P = c._clipPaths[-1]
icp = P.isClipPath
P.isClipPath = 1
self.drawPath(P)
P.isClipPath = icp
else:
c.clipPathClear()
return
c.pathBegin()
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.pathClose)
from reportlab.graphics.shapes import _renderPath
isClosed = _renderPath(path, drawFuncs)
if path.isClipPath:
c.clipPathSet()
c._clipPaths.append(path)
else:
if isClosed: c.pathFill()
c.pathStroke()
class _PDFRenderer(Renderer):
"""This draws onto a PDF document. It needs to be a class
rather than a function, as some PDF-specific state tracking is
needed outside of the state info in the SVG model."""
def __init__(self):
self._stroke = 0
self._fill = 0
self._tracker = StateTracker()
def drawNode(self, node):
"""This is the recursive method called for each node
in the tree"""
#print "pdf:drawNode", self
#if node.__class__ is Wedge: stop
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
self._canvas.restoreState()
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(
rect.x, rect.y,
rect.width, rect.height,
stroke=self._stroke,
fill=self._fill
)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(
rect.x, rect.y,
rect.width, rect.height, rect.rx,
fill=self._fill,
stroke=self._stroke
)
def drawImage(self, image):
path = image.path
# currently not implemented in other renderers
if path and (hasattr(path,'mode') or os.path.exists(image.path)):
self._canvas.drawInlineImage(
path,
image.x, image.y,
image.width, image.height
)
def drawLine(self, line):
if self._stroke:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle(
circle.cx, circle.cy, circle.r,
fill=self._fill,
stroke=self._stroke
)
def drawPolyLine(self, polyline):
if self._stroke:
assert len(polyline.points) >= 2, 'Polyline must have 2 or more points'
head, tail = polyline.points[0:2], polyline.points[2:],
path = self._canvas.beginPath()
path.moveTo(head[0], head[1])
for i in range(0, len(tail), 2):
path.lineTo(tail[i], tail[i+1])
self._canvas.drawPath(path)
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = \
wedge.centerx, wedge.centery, wedge.radius, wedge.startangledegrees, wedge.endangledegrees
yradius, radius1, yradius1 = wedge._xtraRadii()
if yradius is None: yradius = radius
angle = endangledegrees-startangledegrees
path = self._canvas.beginPath()
if (radius1==0 or radius1 is None) and (yradius1==0 or yradius1 is None):
path.moveTo(centerx, centery)
path.arcTo(centerx-radius, centery-yradius, centerx+radius, centery+yradius,
startangledegrees, angle)
else:
path.arc(centerx-radius, centery-yradius, centerx+radius, centery+yradius,
startangledegrees, angle)
path.arcTo(centerx-radius1, centery-yradius1, centerx+radius1, centery+yradius1,
endangledegrees, -angle)
path.close()
self._canvas.drawPath(path,
fill=self._fill,
stroke=self._stroke)
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,y1,x2,y2,fill=self._fill,stroke=self._stroke)
def drawPolygon(self, polygon):
assert len(polygon.points) >= 2, 'Polyline must have 2 or more points'
head, tail = polygon.points[0:2], polygon.points[2:],
path = self._canvas.beginPath()
path.moveTo(head[0], head[1])
for i in range(0, len(tail), 2):
path.lineTo(tail[i], tail[i+1])
path.close()
self._canvas.drawPath(
path,
stroke=self._stroke,
fill=self._fill
)
def drawString(self, stringObj):
if self._fill:
S = self._tracker.getState()
text_anchor, x, y, text, enc = S['textAnchor'], stringObj.x,stringObj.y,stringObj.text, stringObj.encoding
if not text_anchor in ['start','inherited']:
font, font_size = S['fontName'], S['fontSize']
textLen = stringWidth(text, font, font_size, enc)
if text_anchor=='end':
x -= textLen
elif text_anchor=='middle':
x -= textLen*0.5
elif text_anchor=='numeric':
x -= numericXShift(text_anchor,text,textLen,font,font_size,enc)
else:
raise ValueError('bad value for textAnchor '+str(text_anchor))
t = self._canvas.beginText(x,y)
t.textLine(text)
self._canvas.drawText(t)
def drawPath(self, path):
from reportlab.graphics.shapes import _renderPath
pdfPath = self._canvas.beginPath()
drawFuncs = (pdfPath.moveTo, pdfPath.lineTo, pdfPath.curveTo, pdfPath.close)
isClosed = _renderPath(path, drawFuncs)
if isClosed:
fill = self._fill
else:
fill = 0
if path.isClipPath:
self._canvas.clipPath(pdfPath, fill=fill, stroke=self._stroke)
else:
self._canvas.drawPath(pdfPath,
fill=fill,
stroke=self._stroke)
def setStrokeColor(self,c):
self._canvas.setStrokeColor(c)
def setFillColor(self,c):
self._canvas.setFillColor(c)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the PDF operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
self._canvas.transform(value[0], value[1], value[2],
value[3], value[4], value[5])
elif key == 'strokeColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
if value is None:
self._stroke = 0
else:
self._stroke = 1
self.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
# elif key == 'stroke_dasharray':
# self._canvas.setDash(array=value)
elif key == 'strokeDashArray':
if value:
if isinstance(value,(list,tuple)) and len(value)==2 and isinstance(value[1],(tuple,list)):
phase = value[0]
value = value[1]
else:
phase = 0
self._canvas.setDash(value,phase)
else:
self._canvas.setDash()
elif key == 'fillColor':
#this has different semantics in PDF to SVG;
#we always have a color, and either do or do
#not apply it; in SVG one can have a 'None' color
if value is None:
self._fill = 0
else:
self._fill = 1
self.setFillColor(value)
elif key in ['fontSize', 'fontName']:
# both need setting together in PDF
# one or both might be in the deltas,
# so need to get whichever is missing
fontname = delta.get('fontName', self._canvas._fontname)
fontsize = delta.get('fontSize', self._canvas._fontsize)
self._canvas.setFont(fontname, fontsize)
elif key=='fillOpacity':
if value is not None:
self._canvas.setFillAlpha(value)
elif key=='strokeOpacity':
if value is not None:
self._canvas.setStrokeAlpha(value)
elif key=='fillOverprint':
self._canvas.setFillOverprint(value)
elif key=='strokeOverprint':
self._canvas.setStrokeOverprint(value)
elif key=='overprintMask':
self._canvas.setOverprintMask(value)
def __init__(self):
self._stroke = 0
self._fill = 0
self._tracker = StateTracker()
class _SVGRenderer(Renderer):
"""This draws onto an SVG document.
"""
def __init__(self):
self._tracker = StateTracker()
self.verbose = 0
def drawNode(self, node):
"""This is the recursive method called for each node in the tree.
"""
if self.verbose: print "### begin _SVGRenderer.drawNode"
self._canvas.comment('begin node %s'%`node`)
color = self._canvas._color
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.saveState()
#apply state changes
deltas = getStateDelta(node)
self._tracker.push(deltas)
self.applyStateChanges(deltas, {})
#draw the object, or recurse
self.drawNodeDispatcher(node)
rDeltas = self._tracker.pop()
if not (isinstance(node, Path) and node.isClipPath):
pass # self._canvas.restoreState()
self._canvas.comment('end node %s'%`node`)
self._canvas._color = color
#restore things we might have lost (without actually doing anything).
for k, v in rDeltas.items():
if self._restores.has_key(k):
setattr(self._canvas,self._restores[k],v)
if self.verbose: print "### end _SVGRenderer.drawNode"
_restores = {'strokeColor':'_strokeColor','strokeWidth': '_lineWidth','strokeLineCap':'_lineCap',
'strokeLineJoin':'_lineJoin','fillColor':'_fillColor','fontName':'_font',
'fontSize':'_fontSize'}
def drawGroup(self, group):
if self.verbose: print "### begin _SVGRenderer.drawGroup"
currGroup = self._canvas.startGroup()
a, b, c, d, e, f = self._tracker.getState()['transform']
for childNode in group.getContents():
if isinstance(childNode, UserNode):
node2 = childNode.provideNode()
else:
node2 = childNode
self.drawNode(node2)
self._canvas.transform(a, b, c, d, e, f)
self._canvas.endGroup(currGroup)
if self.verbose: print "### end _SVGRenderer.drawGroup"
def drawRect(self, rect):
if rect.rx == rect.ry == 0:
#plain old rectangle
self._canvas.rect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height)
else:
#cheat and assume ry = rx; better to generalize
#pdfgen roundRect function. TODO
self._canvas.roundRect(
rect.x, rect.y,
rect.x+rect.width, rect.y+rect.height,
rect.rx, rect.ry
)
def drawString(self, stringObj):
if self._canvas._fillColor:
S = self._tracker.getState()
text_anchor, x, y, text = S['textAnchor'], stringObj.x, stringObj.y, stringObj.text
if not text_anchor in ['start', 'inherited']:
font, fontSize = S['fontName'], S['fontSize']
textLen = stringWidth(text, font,fontSize)
if text_anchor=='end':
x = x-textLen
elif text_anchor=='middle':
x = x - textLen/2
else:
raise ValueError, 'bad value for text_anchor ' + str(text_anchor)
self._canvas.drawString(text,x,y)
def drawLine(self, line):
if self._canvas._strokeColor:
self._canvas.line(line.x1, line.y1, line.x2, line.y2)
def drawCircle(self, circle):
self._canvas.circle( circle.cx, circle.cy, circle.r)
def drawWedge(self, wedge):
centerx, centery, radius, startangledegrees, endangledegrees = \
wedge.centerx, wedge.centery, wedge.radius, wedge.startangledegrees, wedge.endangledegrees
yradius = wedge.yradius or wedge.radius
(x1, y1) = (centerx-radius, centery-yradius)
(x2, y2) = (centerx+radius, centery+yradius)
extent = endangledegrees - startangledegrees
self._canvas.drawArc(x1, y1, x2, y2, startangledegrees, extent, fromcenter=1)
def drawPolyLine(self, p):
if self._canvas._strokeColor:
self._canvas.polyLine(_pointsFromList(p.points))
def drawEllipse(self, ellipse):
#need to convert to pdfgen's bounding box representation
x1 = ellipse.cx - ellipse.rx
x2 = ellipse.cx + ellipse.rx
y1 = ellipse.cy - ellipse.ry
y2 = ellipse.cy + ellipse.ry
self._canvas.ellipse(x1,y1,x2,y2)
def drawPolygon(self, p):
self._canvas.polygon(_pointsFromList(p.points), closed=1)
def drawPath(self, path):
# print "### drawPath", path.points
from reportlab.graphics.shapes import _renderPath
c = self._canvas
drawFuncs = (c.moveTo, c.lineTo, c.curveTo, c.closePath)
isClosed = _renderPath(path, drawFuncs)
if not isClosed:
c._fillColor = None
c._fillAndStroke([], clip=path.isClipPath)
def applyStateChanges(self, delta, newState):
"""This takes a set of states, and outputs the operators
needed to set those properties"""
for key, value in delta.items():
if key == 'transform':
pass
#self._canvas.transform(value[0], value[1], value[2], value[3], value[4], value[5])
elif key == 'strokeColor':
self._canvas.setStrokeColor(value)
elif key == 'strokeWidth':
self._canvas.setLineWidth(value)
elif key == 'strokeLineCap': #0,1,2
self._canvas.setLineCap(value)
elif key == 'strokeLineJoin':
self._canvas.setLineJoin(value)
elif key == 'strokeDashArray':
if value:
self._canvas.setDash(value)
else:
self._canvas.setDash()
elif key == 'fillColor':
self._canvas.setFillColor(value)
elif key in ['fontSize', 'fontName']:
fontname = delta.get('fontName', self._canvas._font)
fontsize = delta.get('fontSize', self._canvas._fontSize)
self._canvas.setFont(fontname, fontsize)
