def cleanup(node):
"""
"""
if not hasattr(node, "variables"):
ScopeScanner.scan(node)
# Re cleanup until nothing to remove is found
iteration = 0
cleaned = False
Console.info("Removing unused variables...")
Console.indent()
while True:
iteration += 1
modified = __cleanup(node)
if modified > 0:
Console.info("Removed %s unused variables", modified)
ScopeScanner.scan(node)
cleaned = True
else:
break
Console.outdent()
return cleaned
def cleanup(node):
""""""
if not hasattr(node, "variables"):
ScopeScanner.scan(node)
# Re cleanup until nothing to remove is found
iteration = 0
cleaned = False
Console.debug("Removing unused variables...")
Console.indent()
while True:
iteration += 1
modified = __cleanup(node)
if modified > 0:
Console.debug("Removed %s unused variables", modified)
ScopeScanner.scan(node)
cleaned = True
else:
break
Console.outdent()
return cleaned
def permutateTree(tree, permutation=None):
"""
Returns an optimized tree with permutations applied
"""
if permutation:
# Work on a copy
tree = copy.deepcopy(tree)
Resolver.process(tree, permutation)
ScopeScanner.scan(tree)
return tree
else:
return tree
def reduceTree(tree, profile=None):
"""Applies all relevant modifications to the tree to allow compression to CSS."""
Console.info("Reducing tree: %s...", tree.fileId)
Console.indent()
# PHASE 2
# Trivial cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 3
# Resolve all mixins
Mixins.processMixins(tree)
Mixins.processSelectors(tree)
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 4
# Assign selectors to mixins (support for extend)
Mixins.processExtends(tree)
# PHASE 5
# Post mixin cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 6
# Execute variable resolution and method calls
Executer.process(tree, profile)
# PHASE 7
# Flattening selectors
Flatter.process(tree)
# PHASE 8
# Post scan to remove (hopefully) all variable/mixin access
ScopeScanner.scan(tree)
Console.outdent()
return tree
def reduceTree(tree, profile=None):
"""Applies all relevant modifications to the tree to allow compression to CSS."""
Console.info("Reducing tree: %s...", tree.fileId)
Console.indent()
# PHASE 2
# Trivial cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 3
# Resolve all mixins
Mixins.processMixins(tree)
Mixins.processSelectors(tree)
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 4
# Assign selectors to mixins (support for extend)
Mixins.processExtends(tree)
# PHASE 5
# Post mixin cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 6
# Execute variable resolution and method calls
Executer.process(tree, profile)
# PHASE 7
# Flattening selectors
Flatter.process(tree)
# PHASE 8
# Post scan to remove (hopefully) all variable/mixin access
ScopeScanner.scan(tree)
Console.outdent()
return tree
def getCompressed(
self, session, permutation=None, translation=None, optimization=None, formatting=None, context="compressed"
):
tree = self.getMergedTree(permutation, session)
# PHASE 1
# Resolving conditionals
self.__resolveConditionals(tree)
# PHASE 2
# Trivial cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 3
# Resolve all mixins
Mixins.processExtends(tree)
Mixins.processMixins(tree)
Mixins.processSelectors(tree)
# PHASE 4
# Post mixin cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 5
# Compute variables
Variables.compute(tree)
# PHASE 6
# Flattening selectors
Flatter.process(tree)
# PHASE 7
# Post scan to remove (hopefully) all variable/mixin access
ScopeScanner.scan(tree)
# DONE
return Compressor(formatting).compress(tree)
def processTree(tree):
"""
Applies all relevant modifications to the tree to allow compression to CSS
"""
# PHASE 2
# Trivial cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 3
# Resolve all mixins
Mixins.processMixins(tree)
Mixins.processSelectors(tree)
# PHASE 4
# Assign selectors to mixins (support for extend)
Mixins.processExtends(tree)
# PHASE 5
# Post mixin cleanups
ScopeScanner.scan(tree)
Unused.cleanup(tree)
# PHASE 6
# Compute variables
Variables.compute(tree)
# PHASE 7
# Flattening selectors
Flatter.process(tree)
# PHASE 8
# Post scan to remove (hopefully) all variable/mixin access
ScopeScanner.scan(tree)
return tree
