Viewing file:  XPtrFunctions.py (3.01 KB) -rw-r--r--
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from Ft.Lib import boolean
from Ft.Xml import EMPTY_NAMESPACE
def RangeTo(context, expr):
"""
<location-set> range-to(<expr>)
For each location in the context, range-to returns a range.
"""
return []
def StringRange(context, string, startPos=1, length=None):
"""
<location-set> string-range(<location-set>, <string>, <number>?, <number>?)
For each location in the location-set argument, string-range returns a set
of string ranges, a set of substrings in a string.
"""
return []
def Range(context, locationSet):
"""
<location-set> range(<location-set>)
The range function returns ranges covering the locations in the argument
location-set. For each location x in the argument location-set, a range
location representing the covering range of x is added to the result
location-set.
"""
return []
def RangeInside(context, locationSet):
"""
<location-set> range-inside(<location-set>)
The range-inside function returns ranges covering the content of the
locations in the argument location-set. For each location x in the
argument location-set, a range location is added to the result location-set.
"""
return []
def StartPoint(context, point):
"""
<point> start-point(<point>)
For each location x in the argument location-set, start-point adds a
location of type point to the result location-set.
"""
return []
def EndPoint(context, point):
"""
<point> end-point(<point>)
For each location x in the argument location-set, end-point adds a location
of type point to the result location-set.
"""
return []
def Here(context):
"""
<location-set> here()
The here function returns a location-set with a single member. That
location locates the node that directly contains the XPointer being
evaluated.
"""
return [context.originalContext]
def Origin(context):
"""
<location-set> origin()
The origin functions enables addressing relative to out-of-line links
such as defined in XLink. This allows XPointers to be used in applications
to express relative locations when links do not reside directly at one of
their endpoints. The function returns a location-set with a single member,
which locates the element from which a user or program initiated traversal
of the link.
"""
return []
def Unique(context):
"""
<boolean> unique()
The predicate function unique returns true if and only if context size is
equal to 1.
"""
return context.size == 1 and boolean.true or boolean.false
CoreFunctions = {
(EMPTY_NAMESPACE, 'range-to') : RangeTo,
(EMPTY_NAMESPACE, 'string-range') : StringRange,
(EMPTY_NAMESPACE, 'range') : Range,
(EMPTY_NAMESPACE, 'range-inside') : RangeInside,
(EMPTY_NAMESPACE, 'start-point') : StartPoint,
(EMPTY_NAMESPACE, 'end-point') : EndPoint,
(EMPTY_NAMESPACE, 'here') : Here,
(EMPTY_NAMESPACE, 'origin') : Origin,
(EMPTY_NAMESPACE, 'unique') : Unique,
}
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