<s>
TextEdit	B-Operating_System
was	O
the	O
name	O
of	O
a	O
collection	O
of	O
application	B-Application
programming	I-Application
interfaces	I-Application
(	O
APIs	B-Application
)	O
in	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
for	O
performing	O
text	O
editing	O
.	O
</s>
<s>
These	O
APIs	B-Application
were	O
originally	O
designed	O
to	O
provide	O
a	O
common	O
text	O
handling	O
system	O
to	O
support	O
text	O
entry	O
fields	O
in	O
dialog	O
boxes	O
and	O
other	O
simple	O
text	O
editing	O
within	O
the	O
Macintosh	O
GUI	B-Application
.	O
</s>
<s>
Apple	O
repeatedly	O
stated	O
that	O
TextEdit	B-Operating_System
was	O
not	O
a	O
word	B-General_Concept
processor	I-General_Concept
,	O
and	O
therefore	O
providing	O
rich	O
text	O
editing	O
was	O
always	O
left	O
to	O
third-party	O
developers	O
.	O
</s>
<s>
Basic	O
limitations	O
of	O
TextEdit	B-Operating_System
include	O
:	O
</s>
<s>
use	O
of	O
QuickDraw	B-Operating_System
for	O
glyph	O
rendering	O
limited	O
the	O
maximum	O
height	O
of	O
a	O
text	O
block	O
to	O
32,767	O
pixels	O
-	O
this	O
could	O
be	O
encountered	O
well	O
before	O
the	O
character	O
limit	O
was	O
hit	O
with	O
larger	O
font	O
sizes	O
.	O
</s>
<s>
The	O
first	O
incarnation	O
of	O
TextEdit	B-Operating_System
provided	O
support	O
for	O
only	O
a	O
single	O
style	O
of	O
text	O
,	O
which	O
was	O
applied	O
to	O
all	O
text	O
in	O
the	O
block	O
.	O
</s>
<s>
Later	O
,	O
support	O
was	O
added	O
for	O
styled	O
text	O
so	O
that	O
TextEdit	B-Operating_System
could	O
be	O
used	O
for	O
more	O
complex	O
text	O
editing	O
tasks	O
,	O
such	O
as	O
text	O
editing	O
areas	O
in	O
web	O
browsers	O
,	O
etc	O
.	O
</s>
<s>
TextEdit	B-Operating_System
remains	O
part	O
of	O
the	O
Carbon	B-Operating_System
API	I-Operating_System
on	O
macOS	B-Application
,	O
but	O
has	O
been	O
superseded	O
by	O
numerous	O
other	O
solutions	O
including	O
ATSUI	B-Operating_System
in	O
Carbon	O
,	O
the	O
third	O
party	O
WASTE	B-Application
text	I-Application
engine	I-Application
,	O
as	O
well	O
as	O
NSText	O
and	O
related	O
classes	O
within	O
Cocoa	B-Operating_System
.	O
</s>
