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Remove uselessly nested groups, fixed up test script

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JSCHILL1 2009-04-16 16:16:06 -05:00
parent 747a282f5f
commit 579a1f2982
3 changed files with 98 additions and 58 deletions
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55
scour.py
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@ -28,8 +28,6 @@
# TODO: Adapt this script into an Inkscape python plugin
#
# * Specify a limit to the precision of all positional elements.
# * Clean up XML Elements
# * Collapse multiple redundent groups
# * Clean up Definitions
# * Remove duplicate gradient stops
# * Collapse duplicate gradient definitions
@ -48,12 +46,23 @@
# * Collapse all group based transformations
# Next Up:
# - Remove unnecessary nested <g> elements
# - Remove duplicate gradient stops
# + Remove unnecessary nested <g> elements
# - Remove duplicate gradient stops (same offset, stop-color, stop-opacity)
# - Convert all colors to #RRGGBB format
# - Reduce #RRGGBB format to #RGB format when possible
# - rework command-line argument processing so that options are configurable
# - remove unreferenced patterns? https://bugs.edge.launchpad.net/ubuntu/+source/human-icon-theme/+bug/361667/
# Some notes to not forget:
# - removing unreferenced IDs loses some semantic information
# - removing empty nested groups also potentially loses some semantic information
# (i.e. the following button:
# <g>
# <rect .../>
# <text .../>
# </g>
# will be flattened)
# necessary to get true division
from __future__ import division
@ -255,7 +264,7 @@ def removeNamespacedAttributes(node, namespaces):
# now recurse for children
for child in node.childNodes:
removeNamespacedAttributes(child, namespaces)
num += removeNamespacedAttributes(child, namespaces)
return num
def removeNamespacedElements(node, namespaces):
@ -275,10 +284,34 @@ def removeNamespacedElements(node, namespaces):
# now recurse for children
for child in node.childNodes:
removeNamespacedElements(child, namespaces)
num += removeNamespacedElements(child, namespaces)
return num
# TODO: create a class for a SVGLength type (including value and unit)
# this walks further and further down the tree, removing groups
# which do not have any attributes and promoting their children
# up one level
def removeNestedGroups(node):
global numElemsRemoved
num = 0
groupsToRemove = []
for child in node.childNodes:
if child.nodeName == 'g' and child.namespaceURI == NS['SVG'] and len(child.attributes) == 0:
groupsToRemove.append(child)
for g in groupsToRemove:
while g.childNodes.length > 0:
g.parentNode.insertBefore(g.firstChild, g)
g.parentNode.removeChild(g)
numElemsRemoved += 1
num += 1
# now recurse for children
for child in node.childNodes:
if child.nodeType == 1:
num += removeNestedGroups(child)
return num
coord = re.compile("\\-?\\d+\\.?\\d*")
scinumber = re.compile("[\\-\\+]?(\\d*\\.?)?\\d+[eE][\\-\\+]?\\d+")
@ -629,13 +662,17 @@ def scourString(in_string):
numElemsRemoved += 1
# remove unreferenced gradients/patterns outside of defs
removeUnreferencedElements(doc)
while removeUnreferencedElements(doc) > 0:
pass
while removeNestedGroups(doc.documentElement) > 0:
pass
# clean path data
for elem in doc.documentElement.getElementsByTagNameNS(NS['SVG'], 'path') :
cleanPath(elem)
# convert rasters refereces to base64-encoded strings
# convert rasters references to base64-encoded strings
for elem in doc.documentElement.getElementsByTagNameNS(NS['SVG'], 'image') :
embedRasters(elem)