Insert the given attribute into the PangoAttrList.
It will replace any attributes of the same type on that segment and be merged with any adjoining attributes that are identical.
This function is slower than [methodPango.AttrList.insert]
for creating an attribute list in order (potentially
much slower for large lists). However,
[methodPango.AttrList.insert] is not suitable for
continually changing a set of attributes since it
never removes or combines existing attributes.
Given a PangoAttrList and callback function, removes
any elements of list for which func returns %TRUE and
inserts them into a new list.
callback function; returns %TRUE if an attribute should be filtered out
Create a iterator initialized to the beginning of the list.
list must not be modified until this iterator is freed.
This function opens up a hole in list, fills it
in with attributes from the left, and then merges
other on top of the hole.
This operation is equivalent to stretching every attribute
that applies at position pos in list by an amount len,
and then calling [methodPango.AttrList.change] with a copy
of each attribute in other in sequence (offset in position
by pos, and limited in length to len).
This operation proves useful for, for instance, inserting a pre-edit string in the middle of an edit buffer.
For backwards compatibility, the function behaves differently
when len is 0. In this case, the attributes from other are
not imited to len, and are just overlayed on top of list.
This mode is useful for merging two lists of attributes together.
another PangoAttrList
the position in list at which to insert other
the length of the spliced segment. (Note that this must be specified since the attributes in other may only be present at some subsection of this range)
Serializes a PangoAttrList to a string.
No guarantees are made about the format of the string, it may change between Pango versions.
The intended use of this function is testing and debugging. The format is not meant as a permanent storage format.
Decrease the reference count of the given attribute list by one.
If the result is zero, free the attribute list and the attributes it contains.
Update indices of attributes in list for a change in the
text they refer to.
The change that this function applies is removing remove
bytes at position pos and inserting add bytes instead.
Attributes that fall entirely in the (pos, pos + remove)
range are removed.
Attributes that start or end inside the (pos, pos + remove)
range are shortened to reflect the removal.
Attributes start and end positions are updated if they are
behind pos + remove.
the position of the change
the number of removed bytes
the number of added bytes
A
PangoAttrListrepresents a list of attributes that apply to a section of text.The attributes in a
PangoAttrListare, in general, allowed to overlap in an arbitrary fashion. However, if the attributes are manipulated only through [methodPango.AttrList.change], the overlap between properties will meet stricter criteria.Since the
PangoAttrListstructure is stored as a linear list, it is not suitable for storing attributes for large amounts of text. In general, you should not use a singlePangoAttrListfor more than one paragraph of text.