domDoc(n)domDoc(n)______________________________________________________________________________NAMEdomDoc - Manipulates an instance of a DOM document object
SYNOPSIS
domDocObjCmd method ?arg arg ...?
_________________________________________________________________DESCRIPTION
This command manipulates one particular instance of a document object.
method indicates a specific method of the document class. These methods
should closely conform to the W3C recommendation "Document Object Model
(Core) Level 1" (http://www.w3.org/TR/REC-DOM-Level-1/level-one-
core.html). Look at these documents for a deeper understanding of the
functionality.
The valid methods are:
documentElement ?objVar?
Returns the top most element in the document (the root element).
getElementsByTagName name
Returns a list of all elements in the document matching (glob
style) name.
getElementsByTagNameNS uri localname
Returns a list of all elements in the subtree matching (glob
style) localname and having the given namespace uri.
createElement tagName ?objVar?
Creates (allocates) a new element node with node name tagName,
append it to the hidden fragment list in the document object and
returns the node object. If objVar is given the new node object
store in this variable.
createElementNS url tagName ?objVar?
Creates (allocates) a new element node within a namespace having
uri as the URI and node name tagName, which could include the
namespace prefix, append it to the hidden fragment list in the
document object and returns the node object. If objVar is given
the new node object store in this variable.
createTextNode text ?objVar?
Creates (allocates) a new text node with node value text,
appends it to the hidden fragment list in the document object
and returns the node object. If objVar is given, the new node
object is stored in this variable.
createComment text ?objVar?
Creates (allocates) a new comment node with value text, appends
it to the hidden fragment list in the document object and
returns the node object. If objVar is given, the new comment
node object is stored in this variable.
createCDATASection data ?objVar?
Creates (allocates) a new CDATA node with node value data,
appends it to the hidden fragment list in the document object
and returns the node object. If objVar is given, the new node
object is stored in this variable.
createProcessingInstruction target data ?objVar?
Creates a process instruction, appends it to the hidden fragment
list in the document object and returns the node object. If
objVar is given, the new node object is stored in this variable.
delete Explicitly deletes the document, including the associated Tcl
object commands (for nodes, fragment/new nodes, the document
object itself) and the underlying DOM tree.
getDefaultOutputMethod
Returns the default output method of the document. This is usu‐
ally a result of a XSLT transformation.
asXML ?-indent none/1..8? ?-channel channelId? ?-escapeNonASCII? ?-doc‐
typeDeclaration <boolean>? ?-escapeAllQuot?
Returns the DOM tree as an (optional indented) XML string or
sends the output directly to the given channelId. If the option
-escapeNonASCII is given, every non 7 bit ASCII character in
attribute values or element PCDATA content will be escaped as
character reference in decimal representation. The flag -doc‐
typeDeclaration determines, whether there will be a DOCTYPE dec‐
laration emitted before the first node of the document. The
default is, to do not. The DOCTYPE name will always be the ele‐
ment name of the document element. An external entity declara‐
tion of the external subset is only emitted, if the document has
a system identifier. If the option -escapeAllQuot is given, quo‐
tation marks will be escaped with " even in text content of
elements.
asHTML ?-channel channelId? ?-escapeNonASCII? ?-htmlEntities? ?-doc‐
typeDeclaration <boolean>?
Returns the DOM tree serialized acording to HTML rules (HTML
elements are recognized regardless of case, without end tags for
emtpy HTML elements etc.), as string or sends the output
directly to the given channelId. If the option -escapeNonASCII
is given, every non 7 bit ASCII character in attribute values or
element PCDATA content will be escaped as character reference in
decimal representation. If the option -htmlEntities is given, a
character is outputed using a HTML 4.01 character entity refer‐
ence, if one is defined for it. The flag -doctypeDeclaration
determines, whether there will be a DOCTYPE declaration emitted
before the first node of the document. The default is, to do
not. The DOCTYPE name will always be the element name of the
document element without case normalization. An external entity
declaration of the external subset is only emitted, if the docu‐
ment has a system identifier. The doctype declaration will be
written from the avaliable informations, without check, if this
is a known (w3c) HTML version information or if the document
confirms to the given HTML version.
asText The asText method outputs the result tree by outputting the
string-value of every text node in the result tree in document
order without any escaping. In effect, this is what the xslt
output method "text" (XSLT 1.0 recommendation, section 16.3)
does.
publicId ?publicId?
Returns the public identifier of the doctype declaration of the
document, if there is one, otherwise the empty string. If there
is a value given to the method, the public identifier of the
document is set to this value.
systemId ?systemId?
Returns the system identifier of the doctype declaration of the
document, if there is one, otherwise the empty string. If there
is a value given to the method, the system identifier of the
document is set to this value.
internalSubset ?internalSubset?
Returns the internal subset of the doctype declaration of the
document, if there is one, otherwise the empty string. If there
is a value given to the method, the internal subset of the docu‐
ment is set to this value. Note, that none of the parsing meth‐
ods preserve the internal subset of a document; a freshly parsed
document will always have an empty internal subset. Also note,
that the method doesen't do any syntactical check on a given
internal subset.
cdataSectionElements (?URI:?localname|*) ?<boolean>?
This method allows to control, for which element nodes the text
node childs will be serialized as CDATA sections (this affects
only serialization with the asXML method, no text node is
altered in any way by this method). IF the method is called with
an element name as first argument and a boolean with value true
as second argument, every text node child of every element node
in the document with the same name as the first argument will be
serialized as CDATA section. If the second argument is a boolean
with value false, all text nodes of all elements with the same
name as the first argument will be serialized as usual. Names‐
paced element names have to given in the form names‐
pace_URI:localname, not in the otherwise usual prefix:localname
form. With two arguments called, the method returns the used
boolean value. If the method is called with only an element
name, it will return a boolean value, indicating, if the text
nodes childs of all elements with that name in the document will
be serialized as CDATA section elements (return value 1) or not
(return value 0). If the method is called with only one argument
and that argument is an asterisk ('*'), then the method returns
an unordered list of all element names of the document, for
which the text node childs will be serialized as CDATA section
nodes.
selectNodesNamespaces ?prefixUriList?
This method allows to control a document global prefix to names‐
pace URI mapping, which will be used for selectNodes method
calls (on document as well as on all nodes, which belongs to the
document), if it is not overwritten by using the -namespaces
option of the selectNodes method. Any namespace prefix within an
xpath expression will be first resolved against this list. If
the list bind the same prefix to different namespaces, then the
first binding will win. If a prefix could not resolved against
the document global prefix / namespaces list, then the namespace
definitions in scope of the context node will be used to resolve
the prefix, as usual. If the optional argument prefixUriList is
given, then the global prefix / namespace list is set to this
list and returns it. Without the optional argument the method
returns the current list. The default is the empty list.
xslt ?-parameters parameterList? ?-ignoreUndeclaredParameters?
?-xsltmessagecmd script? stylesheet ?outputVar?
Applies an XSLT transformation on the whole document of the node
object using the XSLT stylesheet (given as domDoc). Returns a
document object containing the result document of the transfor‐
mation and stores that document object in the optional output‐
Var, if that was given.
The optional -parameters option sets top level <xsl:param> to
string values. The parameterList has to be a tcl list consisting
of parameter name and value pairs.
If the option -ignoreUndeclaredParameters is given, then parame‐
ter names in the parameterList given to the -parameters options
that are not declared as top-level parameters in the stylesheet
are silently ignored. Without this option, an error is raised,
if the user tries to set a top-level parameter, which is not
declared in the stylesheet.
The -xsltmessagecmd option sets a callback for xslt:message ele‐
ments in the stylesheet. The actual command consists of the
script, given as argument to the option, appended with the XML
Fragment from instantiating the xsl:message element content as
string (as if the XPath string() function would have been
applied to the XML Fragment) and a flag, which indicates, if the
xsl:message has an attribute "terminate" with the value "yes".
toXSLTcmd ?objVar?
If the DOM tree represents a valid XSLT stylesheet, this method
transforms the DOM tree into an xslt command, otherwise it
returns error. The created xsltCmd is returnd and stored in the
objVar, if a var name was given. A successful transformation of
the DOM tree to an xsltCmd removes the domDoc cmd and all
nodeCmds of the document.
The syntax of the created xsltCmd is:
xsltCmd method ?arg ...?
The valid methods are:
transform ?-parameters parameterList? ?-ignoreUndeclaredParame‐
ters? ?-xsltmessagecmd script? domDoc ?outputVar?
Applies XSLT transformation on the document domDoc.
Returns a document object containing the result document
of that transformation and stores it in the optional out‐
putVar.
The optional -parameters option sets top level
<xsl:param> to string values. The parameterList has to be
a tcl list consisting of parameter name and value pairs.
If the option -ignoreUndeclaredParameters is given, then
parameter names in the parameterList given to the -param‐
eters options that are not declared as top-level parame‐
ters in the stylesheet are silently ignored. Without this
option, an error is raised, if the user tries to set a
top-level parameter, which is not declared in the
stylesheet.
The -xsltmessagecmd option sets a callback for xslt:mes‐
sage elements in the stylesheet. The actual command con‐
sists of the script, given as argument to the option,
appended with the XML Fragment from instantiating the
xsl:message element content as string (as if the XPath
string() function would have been applied to the XML
Fragment) and a flag, which indicates, if the xsl:message
has an attribute "terminate" with the value "yes".
delete Deletes the xsltCmd and cleans up all used recourses
If the first argument to an xsltCmd is a domDoc or starts with a
"-", then the command is processed in the same way as <xsltCmd>
transform.
normalize ?-forXPath?
Puts all Text nodes in the document into a "normal" form where
only structure (e.g., elements, comments, processing instruc‐
tions and CDATA sections) separates Text nodes, i.e., there are
neither adjacent Text nodes nor empty Text nodes. If the option
-forXPath is given, all CDATA sections in the nodes are con‐
verted to text nodes, as a first step before the normalization.
nodeType
Returns the node type of the document node. This is always DOCU‐
MENT_NODE.
getElementById id
Returns the node having a id attribute with value id or the
emtpy string, if no node has an id attribute with that value.
firstChild ?objVar?
Returns the first top level node of the document.
lastChild ?objVar?
Returns the last top level node of the document.
appendChild newChild
Append newChild to the end of the list of top level nodes of the
document.
removeChild child
Removes child from the list of top level nodes of the document.
child will be part of the document fragment list after this
operation. It is not physically deleted.
hasChildNodes
Returns 1 if the document has any nodes in the tree. Otherwise 0
is returned.
childNodes
Returns a list of the top level nodes of the document.
ownerDocument ?domObjVar?
Returns the document itself.
insertBefore newChild refChild
Insert newChild before the refChild into the list of top level
nodes of the document. If refChild is the empty string, insert
newChild at the end of the top level nodes.
replaceChild newChild oldChild
Replace oldChild with newChild in the list of children of that
node. The oldChild node will be part of the document fragment
list after this operation.
appendFromList list
Parses list , creates an according DOM subtree and appends this
subtree at the end of the current list of top level nodes of the
document.
appendXML XMLstring
Parses XMLstring, creates an according DOM subtree and appends
this subtree at the end of the current list of top level nodes
of the document.
selectNodes ?-namespaces prefixUriList? ?-cache <boolean>? xpathQuery
?typeVar?
Returns the result of applying the XPath query xpathQuery to the
document. The context node of the query is the root node in the
sense of the XPath recommendation (not the document element).
The result can be a string/value, a list of strings, a list of
nodes or a list of attribute name / value pairs. If typeVar is
given the result type name is stored into that variable (empty,
bool, number, string, nodes, attrnodes or mixed).
The argument xpathQuery has to be a valid XPath expression. How‐
ever, there is one exception to that rule. Tcl variable names
can appear in the XPath statement at any position where it is
legal according to the rules of the XPath syntax to put an XPath
variable. The value of the variable is substituted for the vari‐
able name. Ignoring the syntax rules of XPath the Tcl variable
name may be any legal Tcl var name: local variables, global
variables, array entries and so on.
The option -namespaces expects a tcl list with prefix / names‐
pace pairs as argument. If this option is not given, then any
namespace prefix within the xpath expression will be first
resolved against the list of prefix / namespace pairs set with
the selectNodesNamespaces method for the document, the node
belongs to. If this fails, then the namespace definitions in
scope of the context node will be used to resolve the prefix. If
this option is given, any namespace prefix within the xpath
expression will be first resolved against that given list (and
ignoring the document global prefix / namespace list). If the
list bind the same prefix to different namespaces, then the
first binding will win. If this fails, then the namespace defi‐
nitions in scope of the context node will be used to resolve the
prefix, as usual.
If the -cache option is used with a true value, then the xpath‐
Query will be looked up in a document specific cache. If the
query is found, then the stored pre-compiled query will be used.
If the query isn't found, it will be pre-compiled and stored in
the cache, for use in further calls. Please notice, that the
xpathQuery as given as string is used as key for the cache. This
means, that equal XPath expressions, which differ only in white
space are treated as different cache entries. Special care is
needed, if the XPath expression includes namespace prefixes.
During pre-compilation, the prefixes will be resolved first to
the prefix / namespace pairs of the -namespaces option, if
given, and to the namespaces in scope of the context node at
pre-compilation time. If the XPath is found in the cache, nei‐
ther the -namespaces option nor the namespaces in scope of the
context node will be taken in account but the already resolved
(stored) namespaces will be used for the query.
Examples:
set paragraphNodes [$node selectNodes {chapter[3]//para[@type='warning' or @type='error'} ]
foreach paragraph $paragraphNodes {
lappend values [$paragraph selectNodes attribute::type]
}
set doc [dom parse {<doc xmlns="http://www.defaultnamespace.org"><child/></doc>}]
set root [$doc documentElement]
set childNodes [$root selectNodes -namespaces {default http://www.defaultnamespace.org} default:child]
baseURI ?URI?
Returns the present baseURI of the document. If the optional
argument URI is given, sets the base URI of the document to the
given URI.
appendFromScript tclScript
Appends the nodes created by the tclScript by Tcl functions,
which have been built using dom createNodeCmd, at the end of the
current list of top level nodes of the document.
insertBeforeFromScript tclScript refChild
Inserts the nodes created in the tclScript by Tcl functions,
which have been built using dom createNodeCmd, before the
refChild into to the list of top level nodes of the document. If
refChild is the empty string, the new nodes will be appended.
deleteXPathCache ?xpathQuery?
If called without the optional argument, all cached XPath
expressions of the document are freed. If called with the
optional argument xpathQuery, this single XPath query will be
removed from the cache, if it is there. The method always
returns an empty string.
Otherwise, if an unknown method name is given, the command with the
same name as the given metho within the namespace ::dom::domDoc is
tried to be executed. This allows quick method additions on Tcl level.
Newly created nodes are appended to a hidden fragment list. If they are
not moved into the tree they are automaticaly deleted, when the whole
document gets deleted.
SEE ALSO
dom, domNode
KEYWORDS
DOM node creation, document element
TcldomDoc(n)
