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from SCons.Script import * |
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from xml.dom.minidom import parse as parseXml |
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def svg2pgf_shape(filename): |
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''' |
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Convert given SVG file to TiKZ code. |
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''' |
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xml = parseXml(filename) |
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# determine size of the picture from SVG source |
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svg = xml.getElementsByTagName('svg')[0] |
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name = svg.attributes['id'].value |
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height = int(svg.attributes['height'].value) |
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width = int(svg.attributes['width'].value) |
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# Define shape anchors, based on image size |
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# We need double backslashes since the output is Python again |
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# The SVG coordinate system is mirrored on the horizon axis, so we add a rotation command and a positional compensation |
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result = ''' |
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\\\\pgfdeclareshape{%(name)s}{ |
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\\\\anchor{center}{\pgfpoint{%(halfwidth)u}{%(halfheight)u}} |
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\\\\anchor{north}{\pgfpoint{%(halfwidth)u}{%(height)u}} |
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\\\\anchor{south}{\pgfpoint{%(halfwidth)u}{0}} |
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\\\\anchor{west}{\pgfpoint{0}{%(halfheight)u}} |
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\\\\anchor{east}{\pgfpoint{%(width)u}{%(halfheight)u}} |
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\\\\foregroundpath{ |
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\\\\pgfsetlinewidth{1.4} |
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\\\\pgftransformshift{\pgfpoint{%(width)u}{%(height)u}} |
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\\\\pgftransformrotate{180} |
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\\\\pgfsetfillcolor{white} |
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'''%{'name':name, 'height':height, 'halfheight':height/2, 'width':width, 'halfwidth':width/2} |
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# add all SVG path |
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pathCommands = xml.getElementsByTagName('path') |
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for p in pathCommands: |
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# The path may have styling. We ignore everything but dashing. |
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if p.attributes.has_key('style'): |
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if 'stroke-dasharray' in p.attributes['style'].value: |
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# http://stuff.mit.edu/afs/athena/contrib/tex-contrib/beamer/pgf-1.01/doc/generic/pgf/version-for-tex4ht/en/pgfmanualse23.html |
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result += " \\\\pgfsetdash{{4.2}{1.4}}{0}\n" |
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# Add the SVG path |
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result +=" \\\\pgfpathsvg{%s}\n"%p.attributes['d'].value |
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# add all SVG rectangle definitions |
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# Add usepath after each rectangle, in order to get overlayed filled rects correctly generated |
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rectCommands = xml.getElementsByTagName('rect') |
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for r in rectCommands: |
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rheight = float(r.attributes['height'].value) |
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rwidth = float(r.attributes['width'].value) |
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x = float(r.attributes['x'].value) |
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y = float(r.attributes['y'].value) |
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result += " \\\\pgfrect{\pgfpoint{%f}{%f}}{\pgfpoint{%f}{%f}}\n\\\\pgfusepath{stroke, fill}\n"%(x, y, rwidth, rheight) |
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# add all SVG circle definitions |
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circleCommands = xml.getElementsByTagName('circle') |
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for c in circleCommands: |
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x = float(c.attributes['cx'].value) |
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y = float(c.attributes['cy'].value) |
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radius = float(c.attributes['r'].value) |
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result += " \\\\pgfcircle{\pgfpoint{%f}{%f}}{%f}\n\\\\pgfusepath{stroke, fill}\n"%(x,y,radius) |
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# finalize TiKZ shape definition |
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result += ' \\\\pgfusepath{stroke}\n}}' |
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return result |
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def build_shape_lib_recursive(sources, covered=[]): |
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''' |
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Build static LaTex representation for our graphical symbols as TiKZ shapes. |
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Some SVGs occur multiple times in subdirectories, so we track the already |
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converted ones. |
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''' |
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result = '' |
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for f in sources: |
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try: |
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result += svg2pgf_shape(str(f)) |
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print "Converting %s to TiKZ shape ..."%f |
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except Exception, e: |
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print "Error on parsing, ignoring %s ..."%f |
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print e |
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return result |
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def createTikzLib(target, source, env): |
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'''Builds TiKZ shape library needed for Latex export / rendedering server.''' |
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print "Generating TiKZ shape library ..." |
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f=open(str(target[0]),"w") |
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f.write("# Auto-generated, do not change !\n") |
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f.write("tikz_shapes='''") |
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f.write("\n%% Start of shape library. This part remains the same for all graph exports.") |
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f.write(build_shape_lib_recursive(source)) |
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f.write("\n%% End of shape library. This part below is unique for all graph exports.\n") |
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f.write("'''") |
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f.close() |
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89
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tikzbuilder = Builder(action = createTikzLib) |
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troeger /
fuzzed
