parsefile() now calls self.update() while filling the buffer,

so you can read the top of the man page while the rest is being parsed
This commit is contained in:
Guido van Rossum 1994-07-08 09:14:54 +00:00
parent 97aeca1527
commit fdfa2b5136
1 changed files with 89 additions and 59 deletions

View File

@ -23,72 +23,102 @@ class EditableManPage(ScrolledText):
ScrolledText.__init__(self, master, cnf)
# Define tags for formatting styles
self.tag_config('bold', {'font': BOLDFONT})
self.tag_config('italic', {'font': ITALICFONT})
self.tag_config('underline', {'underline': 1})
self.tag_config('X', {'font': BOLDFONT})
self.tag_config('!', {'font': ITALICFONT})
self.tag_config('_', {'underline': 1})
# Create mapping from characters to tags
self.tagmap = {
'X': 'bold',
'_': 'underline',
'!': 'italic',
}
# Parse nroff output piped through ul -i and append it to the
# text widget
def parsefile(self, fp):
save_cursor = self['cursor']
self['cursor'] = 'watch'
self.update()
ok = 0
empty = 0
nextline = None
if hasattr(self, 'buffer'):
raise RuntimeError, 'Still busy parsing!'
from select import select
def avail(fp=fp, tout=0.0, select=select):
return select([fp], [], [], tout)[0]
height = self.getint(self['height'])
self.startparser()
while 1:
if nextline:
line = nextline
nextline = None
else:
line = fp.readline()
if not line:
break
if emptyprog.match(line) >= 0:
empty = 1
continue
if self.lineno < height or \
self.lineno%10 == 0 or not avail():
self.update()
nextline = fp.readline()
if nextline and ulprog.match(nextline) >= 0:
propline = nextline
nextline = None
else:
propline = ''
if not ok:
ok = 1
empty = 0
continue
if footerprog.match(line) >= 0:
ok = 0
empty = 0
continue
if empty:
self.insert_prop('\n')
empty = 0
p = ''
j = 0
for i in range(min(len(propline), len(line))):
if propline[i] != p:
if j < i:
self.insert_prop(line[j:i], p)
j = i
p = propline[i]
self.insert_prop(line[j:])
self['cursor'] = save_cursor
if not nextline:
break
self.parseline(nextline)
self.endparser()
self.update()
def startparser(self):
self.lineno = 0
self.ok = 0
self.empty = 0
self.buffer = None
def endparser(self):
if self.buffer:
self.parseline('')
del self.ok, self.empty, self.buffer
def parseline(self, nextline):
if not self.buffer:
# Save this line -- we need one line read-ahead
self.buffer = nextline
return
if emptyprog.match(self.buffer) >= 0:
# Buffered line was empty -- set a flag
self.empty = 1
self.buffer = nextline
return
textline = self.buffer
if ulprog.match(nextline) >= 0:
# Next line is properties for buffered line
propline = nextline
self.buffer = None
else:
# Next line is read-ahead
propline = None
self.buffer = nextline
if not self.ok:
# First non blank line after footer must be header
# -- skip that too
self.ok = 1
self.empty = 0
return
if footerprog.match(textline) >= 0:
# Footer -- start skipping until next non-blank line
self.ok = 0
self.empty = 0
return
if self.empty:
# One or more previous lines were empty
# -- insert one blank line in the text
self.insert_prop('\n')
self.lineno = self.lineno + 1
self.empty = 0
if not propline:
# No properties
self.insert_prop(textline)
self.lineno = self.lineno + 1
return
# Search for properties
p = ''
j = 0
for i in range(min(len(propline), len(textline))):
if propline[i] != p:
if j < i:
self.insert_prop(textline[j:i], p)
j = i
p = propline[i]
self.insert_prop(textline[j:])
self.lineno = self.lineno + 1
def insert_prop(self, str, prop = ' '):
here = self.index(AtInsert())
self.insert(AtInsert(), str)
for tag in self.tagmap.values():
self.tag_remove(tag, here, AtInsert())
if self.tagmap.has_key(prop):
self.tag_add(self.tagmap[prop], here, AtInsert())
self.insert(AtInsert(), str[0])
tags = self.tag_names(here)
for tag in tags:
self.tag_remove(tag, here)
if prop != ' ':
self.tag_add(prop, here)
self.insert(AtInsert(), str[1:])
# Readonly Man Page class -- disables editing, otherwise the same
class ReadonlyManPage(EditableManPage):