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Commit 5eb21653 authored by Guido van Rossum's avatar Guido van Rossum
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Deleting DOM-using modules.

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lib/python/TAL/CopyingDOMVisitor.py deleted 100644 → 0
View file @ 39d9c746
##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
"""
Make an exact copy of a DOM document (sub)tree.
"""
from xml.dom import Node
from DOMVisitor import DOMVisitor
class CopyingDOMVisitor(DOMVisitor):
def __init__(self, rootNode, documentFactory):
DOMVisitor.__init__(self, rootNode)
self.documentFactory = documentFactory
def __call__(self):
self.newDocument = None
self.curNode = None
DOMVisitor.__call__(self)
return self.newDocument
def visitElement(self, node):
self.copyElement(node)
self.copyAllAttributes(node)
DOMVisitor.visitElement(self, node)
self.backUp()
def backUp(self):
self.curNode = self.curNode.parentNode
def copyElement(self, node):
namespaceURI = node.namespaceURI
if self.newDocument is None:
# This must be the documentElement node. Create the
# document now; this also creates the documentElement node
self.newDocument = self.documentFactory.createDocument(
namespaceURI, node.nodeName, None)
newNode = self.newDocument.documentElement
else:
newNode = self.newDocument.createElementNS(namespaceURI,
node.nodeName)
self.curNode.appendChild(newNode)
self.curNode = newNode
def copyAllAttributes(self, node):
for attr in node.attributes.values():
self.copyAttribute(attr)
def copyAttribute(self, attr):
if attr.namespaceURI:
self.curNode.setAttributeNS(
attr.namespaceURI, attr.nodeName, attr.nodeValue)
else:
self.curNode.setAttribute(attr.nodeName, attr.nodeValue)
def visitText(self, node):
newNode = self.newDocument.createTextNode(node.nodeValue)
self.curNode.appendChild(newNode)
def visitComment(self, node):
if self.newDocument:
newNode = self.newDocument.createComment(node.nodeValue)
self.curNode.appendChild(newNode)
# XXX Else, this is a comment before the documentElement; lose it.
lib/python/TAL/DOMVisitor.py deleted 100644 → 0
View file @ 39d9c746
##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
"""
Visitor class for DOM trees.
XXX Assumptions: only Document and Element nodes have children worth
visiting. This is probably wrong, but good enough for now. Please
let me know which node types I should also deal with!
XXX This may not be as general as the Visitor class in product
ParsedXML.Printer.py, but that uses ParsedXML.DOM.Traversal, and I
don't want this class to depend on the DOM implementation there.
"""
from xml.dom import Node
class DOMVisitor:
"""
Visitor class for DOM trees.
Subclass this class, overriding methods for visiting the various
node types. Instantiate your subclass with a particular DOM node
to create a visitor instance for the DOM subtree rooted at that
node. Call your instance to visit each node in that subtree once,
in document order.
There's a visit<NodeType>() method for each node type. There's
also a visitUnknown() which is called for unrecognized node types
(which shouldn't happen if you are using a standard DOM
implementation).
You can influence which nodes are visited in which order by
overriding visitAllChildren(), and/or by overriding
visitDocument() and visitElement(). If you override the latter
two, be careful to either call the base class method or call
visitAllChildren() as shown in their base class implementations,
otherwise the tree traversal will break.
"""
def __init__(self, rootNode):
"""
Construct a visitor instance.
Arguments:
rootNode: the root of the subtree to be traversed. This is
typically a document node or an element node.
"""
self.rootNode = rootNode
def __call__(self):
"""
Traverse the subtree given to the constructor.
"""
self.visitNode(self.rootNode)
def visitNode(self, node):
"""
Visit any type of node.
This switches out to one of the node-specific visitor methods.
The recursing down into children is handled by calling
visitAllChildren() in the node-specific visitor methods.
"""
methodName = self.visitSwitch.get(node.nodeType, "visitUnknown")
method = getattr(self, methodName)
method(node)
# Dictionary mapping node types to method names, used in visitNode
visitSwitch = {
Node.ELEMENT_NODE: "visitElement",
Node.ATTRIBUTE_NODE: "visitAttribute",
Node.TEXT_NODE: "visitText",
Node.CDATA_SECTION_NODE: "visitCDATASection",
Node.ENTITY_REFERENCE_NODE: "visitEntityReference",
Node.ENTITY_NODE: "visitEntity",
Node.PROCESSING_INSTRUCTION_NODE: "visitProcessingInstruction",
Node.COMMENT_NODE: "visitComment",
Node.DOCUMENT_NODE: "visitDocument",
Node.DOCUMENT_TYPE_NODE: "visitDocumentType",
Node.DOCUMENT_FRAGMENT_NODE: "visitDocumentFragment",
Node.NOTATION_NODE: "visitNotation",
}
def visitUnknown(self, node):
"""
Visit a node of an unknown type.
"""
pass
def visitDocument(self, node):
"""
Visit a document node.
This calls visitAllChildren() to recurse into the document tree.
"""
self.visitAllChildren(node)
def visitElement(self, node):
"""
Visit an element node.
This calls visitAllChildren() to recurse into the document
tree.
"""
self.visitAllChildren(node)
def visitAllChildren(self, node):
"""
Call visitNode() for each child of the given node.
"""
# XXX eventually use firstChild/nextSibling, for speed
for child in node.childNodes:
self.visitNode(child)
def visitAttribute(self, node):
"""
Override this empty method to visit an attribute node.
"""
pass
def visitText(self, node):
"""
Override this empty method to visit a text node.
"""
pass
def visitCDATASection(self, node):
"""
Override this empty method to visit a CDATA section node.
"""
pass
def visitEntityReference(self, node):
"""
Override this empty method to visit an entity reference node.
"""
pass
def visitEntity(self, node):
"""
Override this empty method to visit an entity node.
"""
self.visitAllChildren(node)
def visitProcessingInstruction(self, node):
"""
Override this empty method to visit a processing instruction node.
"""
pass
def visitComment(self, node):
"""
Override this empty method to visit a comment node.
"""
pass
def visitDocumentType(self, node):
"""
Override this empty method to visit a document type node.
"""
pass
def visitDocumentFragment(self, node):
"""
Override this empty method to visit a document fragment node.
"""
pass
def visitNotation(self, node):
"""
Override this empty method to visit a notation node.
"""
pass
lib/python/TAL/TALCompiler.py deleted 100644 → 0
View file @ 39d9c746
##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
"""
Compile a DOM tree for efficient METAL and TAL expansion.
"""
import string
from xml.dom import Node
from DOMVisitor import DOMVisitor
from TALGenerator import TALGenerator
from TALDefs import *
class METALCompiler(DOMVisitor, TALGenerator):
def __init__(self, document, expressionCompiler=None):
self.document = document
DOMVisitor.__init__(self, document)
TALGenerator.__init__(self, expressionCompiler)
def __call__(self):
self.namespaceDict = {"xml": XML_NS}
self.namespaceStack = [self.namespaceDict]
DOMVisitor.__call__(self)
assert not self.stack
return self.program, self.macros
def pushNS(self):
self.namespaceStack.append(self.namespaceDict)
def popNS(self):
self.namespaceDict = self.namespaceStack.pop()
def newNS(self, prefix, namespaceURI):
if self.namespaceDict.get(prefix) != namespaceURI:
if self.namespaceDict is self.namespaceStack[-1]:
self.namespaceDict = self.namespaceDict.copy()
self.namespaceDict[prefix] = namespaceURI
return 1
else:
return 0
def getFullAttrList(self, node):
attr_nodes = node.attributes.values() # Cache this!
self.checkSpuriousAttributes(attr_nodes)
list = []
# First, call newNS() for explicit xmlns and xmlns:prefix attributes
for attr in attr_nodes:
if attr.namespaceURI == XMLNS_NS:
# This is a namespace declaration
# XXX Should be able to use prefix and localName, but can't
name = attr.name
i = string.find(name, ':')
if i < 0:
declPrefix = None
else:
declPrefix = name[i+1:]
self.newNS(declPrefix, attr.value)
# Add namespace declarations for the node itself, if needed
if node.namespaceURI:
if self.newNS(node.prefix, node.namespaceURI):
if node.prefix:
list.append(("xmlns:" + node.prefix, node.namespaceURI))
else:
list.append(("xmlns", node.namespaceURI))
# Add namespace declarations for each attribute, if needed
for attr in attr_nodes:
if attr.namespaceURI:
if attr.namespaceURI == XMLNS_NS:
continue
if self.newNS(attr.prefix, attr.namespaceURI):
if attr.prefix:
list.append(
("xmlns:" + attr.prefix, attr.namespaceURI))
else:
list.append(("xmlns", node.namespaceURI))
# Add the node's attributes
list.extend(self.getAttributeList(node, attr_nodes))
return list
def emitStartTag(self, node):
self.emit("startTag", node.nodeName, self.getFullAttrList(node))
def emitStartEndTag(self, node):
self.emit("startEndTag", node.nodeName, self.getFullAttrList(node))
def emitEndTag(self, node):
self.emit("endTag", node.nodeName)
def visitElement(self, node):
self.pushNS()
if not node.hasAttributes():
self.emitElement(node)
else:
self.expandElement(node)
self.popNS()
def checkSpuriousAttributes(self, attr_nodes,
ns=ZOPE_METAL_NS,
known=KNOWN_METAL_ATTRIBUTES,
error=METALError,
what="METAL"):
for attr in attr_nodes:
if attr.namespaceURI == ns:
if attr.localName not in known:
raise error(
"bad %s attribute: %s;\nallowed are: %s" %
(what, repr(attr.name), string.join(known)))
def expandElement(self, node):
macroName = node.getAttributeNS(ZOPE_METAL_NS, "use-macro")
if macroName:
self.pushProgram()
self.pushSlots()
self.compileElement(node)
self.emitUseMacro(macroName)
return
macroName = node.getAttributeNS(ZOPE_METAL_NS, "define-macro")
if macroName:
self.pushProgram()
self.compileElement(node)
self.emitDefineMacro(macroName)
return
slotName = node.getAttributeNS(ZOPE_METAL_NS, "define-slot")
if slotName:
self.pushProgram()
self.compileElement(node)
self.emitDefineSlot(slotName)
return
slotName = node.getAttributeNS(ZOPE_METAL_NS, "fill-slot")
if slotName:
self.pushProgram()
self.compileElement(node)
self.emitFillSlot(slotName)
return
self.compileElement(node)
def compileElement(self, node):
self.emitElement(node)
def emitElement(self, node):
if not node.hasChildNodes():
self.emitStartEndTag(node)
else:
self.emitStartTag(node)
self.visitAllChildren(node)
self.emitEndTag(node)
def visitText(self, node):
self.emitText(node.nodeValue)
def visitComment(self, node):
self.emit("comment", node.nodeValue)
def getAttributeList(self, node, attr_nodes):
if not attr_nodes:
return []
attrList = []
for attrNode in attr_nodes:
item = attrNode.nodeName, attrNode.nodeValue
if (attrNode.namespaceURI == ZOPE_METAL_NS and
attrNode.localName == "define-macro"):
item = item + ("macroHack",)
attrList.append(item)
return attrList
class TALCompiler(METALCompiler):
# Extending METAL method to add attribute replacements
def getAttributeList(self, node, attr_nodes):
attrList = METALCompiler.getAttributeList(self, node, attr_nodes)
attrDict = self.getAttributeReplacements(node)
if not attrDict:
return attrList
list = []
for item in attrList:
key, value = item[:2]
if attrDict.has_key(key):
item = (key, value, "replace", attrDict[key])
del attrDict[key] # XXX Why?
list.append(item)
return list
# Overriding METAL method to compile TAL statements
def compileElement(self, node):
defines = node.getAttributeNS(ZOPE_TAL_NS, "define")
if defines:
self.emit("beginScope")
self.emitDefines(defines)
self.conditionalElement(node)
self.emit("endScope")
else:
self.conditionalElement(node)
# Extending METAL method to check for TAL statements
def checkSpuriousAttributes(self, attr_nodes):
METALCompiler.checkSpuriousAttributes(self, attr_nodes)
METALCompiler.checkSpuriousAttributes(
self, attr_nodes,
ZOPE_TAL_NS, KNOWN_TAL_ATTRIBUTES, TALError, "TAL")
def conditionalElement(self, node):
condition = node.getAttributeNS(ZOPE_TAL_NS, "condition")
if condition:
self.pushProgram()
self.modifyingElement(node)
self.emitCondition(condition)
else:
self.modifyingElement(node)
def modifyingElement(self, node):
insert = node.getAttributeNS(ZOPE_TAL_NS, "insert")
replace = node.getAttributeNS(ZOPE_TAL_NS, "replace")
repeat = node.getAttributeNS(ZOPE_TAL_NS, "repeat")
n = 0
if insert: n = n+1
if replace: n = n+1
if repeat: n = n+1
if n > 1:
raise TALError("can't use insert/replace/repeat together")
ok = 0
if insert:
ok = self.doInsert(node, insert)
if not ok and replace:
if node.isSameNode(self.document.documentElement):
raise TALError("can't use replace on the document element")
ok = self.doReplace(node, replace)
if not ok and repeat:
if node.isSameNode(self.document.documentElement):
raise TALError("can't use repeat on the document element")
ok = self.doRepeat(node, repeat)
if not ok:
self.emitElement(node)
def doInsert(self, node, arg):
self.emitStartTag(node)
self.pushProgram()
self.visitAllChildren(node)
self.emitSubstitution(arg)
self.emitEndTag(node)
return 1
def doReplace(self, node, arg):
attrDict = self.getAttributeReplacements(node)
self.pushProgram()
self.emitElement(node)
self.emitSubstitution(arg, attrDict)
return 1
def doRepeat(self, node, arg):
whitespace = self.unEmitNewlineWhitespace()
self.emit("beginScope")
self.pushProgram()
if whitespace:
self.emitText(whitespace)
self.emitElement(node)
self.emitRepeat(arg)
self.emit("endScope")
return 1
def getAttributeReplacements(self, node):
attrDict = {}
value = node.getAttributeNS(ZOPE_TAL_NS, "attributes")
if value:
rawDict = parseAttributeReplacements(value)
for key, expr in rawDict.items():
attrDict[key] = self.compileExpression(expr)
return attrDict
def test():
from driver import FILE, parsefile
doc = parsefile(FILE)
compiler = TALCompiler(doc)
program, macros = compiler()
from pprint import pprint
print "---program---"
pprint(program)
print "---macros---"
pprint(macros)
if __name__ == "__main__":
test()
lib/python/TAL/TALVisitor.py deleted 100644 → 0
View file @ 39d9c746
##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
"""
Copy a DOM tree, applying TAL (Template Attribute Language) transformations.
"""
import string
import re
from xml.dom import Node
from CopyingDOMVisitor import CopyingDOMVisitor
from TALDefs import ZOPE_TAL_NS, ZOPE_METAL_NS, NAME_RE
from TALDefs import macroIndexer, slotIndexer
from TALDefs import splitParts, parseAttributeReplacements
from TALDefs import parseSubstitution
class TALVisitor(CopyingDOMVisitor):
"""
Copy a DOM tree while applying TAL transformations.
The DOM tree must have been created with XML namespace information
included (i.e. I'm not going to interpret your xmlns* attributes
for you), otherwise we will make an unmodified copy.
"""
def __init__(self, document, documentFactory, engine):
CopyingDOMVisitor.__init__(self, document, documentFactory)
self.document = document
self.engine = engine
self.currentMacro = None
self.originalNode = None
self.slotIndex = None
def visitElement(self, node):
if not node.hasAttributes():
CopyingDOMVisitor.visitElement(self, node)
return
macroName = node.getAttributeNS(ZOPE_METAL_NS, "use-macro")
if macroName:
macroNode = self.findMacro(macroName)
if macroNode:
self.expandMacro(macroNode, node, macroName)
return
if self.currentMacro and self.slotIndex and self.originalNode:
slotName = node.getAttributeNS(ZOPE_METAL_NS, "define-slot")
if slotName:
slotNode = self.slotIndex.get(slotName)
if slotNode:
self.visitElement(slotNode)
return
defines = node.getAttributeNS(ZOPE_TAL_NS, "define")
if defines:
self.engine.beginScope()
self.doDefine(defines)
self.finishElement(node)
self.engine.endScope()
else:
self.finishElement(node)
def finishElement(self, node):
condition = node.getAttributeNS(ZOPE_TAL_NS, "condition")
if condition and not self.engine.evaluateBoolean(condition):
return
attrDict = {}
attributes = node.getAttributeNS(ZOPE_TAL_NS, "attributes")
if attributes:
attrDict = parseAttributeReplacements(attributes)
insert = node.getAttributeNS(ZOPE_TAL_NS, "insert")
replace = node.getAttributeNS(ZOPE_TAL_NS, "replace")
repeat = node.getAttributeNS(ZOPE_TAL_NS, "repeat")
n = 0
if insert: n = n+1
if replace: n = n+1
if repeat: n = n+1
if n > 1:
print "Please use only one of insert, replace, repeat"
ok = 0
if insert:
ok = self.doInsert(node, insert, attrDict)
if not ok and replace:
# XXX Check that this isn't the documentElement
ok = self.doReplace(node, replace, attrDict)
if not ok and repeat:
# XXX Check that this isn't the documentElement
ok = self.doRepeat(node, repeat, attrDict)
if not ok:
self.copySubtree(node, attrDict)
def findMacro(self, macroName):
# XXX This is not written for speed :-)
doc, localName = self.engine.findMacroDocument(macroName)
if not doc:
doc = self.document
macroDict = macroIndexer(doc)
if macroDict.has_key(localName):
return macroDict[localName]
else:
print "No macro found:", macroName
return None
def expandMacro(self, macroNode, originalNode, macroName):
save = self.currentMacro, self.slotIndex, self.originalNode
self.currentMacro = macroName
self.slotIndex = slotIndexer(originalNode)
self.originalNode = originalNode
self.visitElement(macroNode)
self.currentMacro, self.slotIndex, self.originalNode = save
def doDefine(self, arg):
for part in splitParts(arg):
m = re.match(
r"\s*(?:(global|local)\s+)?(%s)\s+(.*)" % NAME_RE, part)
if not m:
print "Bad syntax in define argument:", `part`
else:
scope, name, expr = m.group(1, 2, 3)
scope = scope or "local"
value = self.engine.evaluateValue(expr)
if scope == "local":
self.engine.setLocal(name, value)
else:
self.engine.setGlobal(name, value)
def doInsert(self, node, arg, attrDict):
key, expr = parseSubstitution(arg)
if not key:
return 0
self.copyElement(node)
self.copyAttributes(node, attrDict)
self.doSubstitution(key, expr, {})
self.backUp()
return 1
def doReplace(self, node, arg, attrDict):
key, expr = parseSubstitution(arg)
if not key:
return 0
self.doSubstitution(key, expr, attrDict)
return 1
def doSubstitution(self, key, expr, attrDict):
if key == "text":
if attrDict:
print "Warning: attributes unused for text replacement"
data = self.engine.evaluateText(expr)
newChild = self.newDocument.createTextNode(str(data))
self.curNode.appendChild(newChild)
elif key == "structure":
# XXX need to copy the nodes
data = self.engine.evaluateStructure(expr)
# XXX maybe data needs to be a documentFragment node;
# then the implementation here isn't quite right
attrDone = not attrDict
for newChild in data:
self.curNode.appendChild(newChild)
if not attrDone and newChild.nodeType == Node.ELEMENT_NODE:
self.changeAttributes(newChild, attrDict)
attrDone = 1
if not attrDone:
# Apparently no element nodes were inserted
print "Warning: attributes unused for struct replacement"
def doRepeat(self, node, arg, attrDict):
if not self.newDocument:
print "Can't have repeat on the documentElement"
return 0
m = re.match("\s*(%s)\s+(.*)" % NAME_RE, arg)
if not m:
print "Bad syntax in repeat:", `arg`
return 0
name, expr = m.group(1, 2)
iterator = self.engine.setRepeat(name, expr)
while iterator.next():
self.copySubtree(node, attrDict)
return 1
def copySubtree(self, node, attrDict):
self.copyElement(node)
self.copyAttributes(node, attrDict)
self.visitAllChildren(node)
self.backUp()
def copyAttributes(self, node, attrDict):
for attr in node.attributes.values():
namespaceURI = attr.namespaceURI
attrName = attr.nodeName
attrValue = attr.nodeValue
if attrDict.has_key(attrName):
expr = attrDict[attrName]
if expr == "nothing":
continue
attrValue = self.engine.evaluateText(expr)
if attrValue is None:
continue
if namespaceURI:
# When expanding a macro, change its define-macro to use-macro
if (self.currentMacro and
namespaceURI == ZOPE_METAL_NS and
attr.localName == "define-macro"):
attrName = attr.prefix + ":use-macro"
attrValue = self.currentMacro
self.curNode.setAttributeNS(namespaceURI, attrName, attrValue)
else:
self.curNode.setAttribute(attrName, attrValue)
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