mirror of https://github.com/python/cpython
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
parent
97aeca1527
commit
fdfa2b5136
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@ -23,72 +23,102 @@ class EditableManPage(ScrolledText):
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ScrolledText.__init__(self, master, cnf)
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# Define tags for formatting styles
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self.tag_config('bold', {'font': BOLDFONT})
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self.tag_config('italic', {'font': ITALICFONT})
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self.tag_config('underline', {'underline': 1})
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self.tag_config('X', {'font': BOLDFONT})
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self.tag_config('!', {'font': ITALICFONT})
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self.tag_config('_', {'underline': 1})
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# Create mapping from characters to tags
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self.tagmap = {
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'X': 'bold',
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'_': 'underline',
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'!': 'italic',
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}
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# Parse nroff output piped through ul -i and append it to the
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# text widget
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def parsefile(self, fp):
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save_cursor = self['cursor']
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self['cursor'] = 'watch'
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self.update()
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ok = 0
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empty = 0
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nextline = None
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if hasattr(self, 'buffer'):
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raise RuntimeError, 'Still busy parsing!'
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from select import select
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def avail(fp=fp, tout=0.0, select=select):
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return select([fp], [], [], tout)[0]
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height = self.getint(self['height'])
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self.startparser()
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while 1:
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if nextline:
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line = nextline
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nextline = None
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else:
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line = fp.readline()
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if not line:
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break
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if emptyprog.match(line) >= 0:
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empty = 1
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continue
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if self.lineno < height or \
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self.lineno%10 == 0 or not avail():
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self.update()
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nextline = fp.readline()
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if nextline and ulprog.match(nextline) >= 0:
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propline = nextline
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nextline = None
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else:
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propline = ''
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if not ok:
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ok = 1
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empty = 0
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continue
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if footerprog.match(line) >= 0:
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ok = 0
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empty = 0
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continue
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if empty:
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self.insert_prop('\n')
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empty = 0
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p = ''
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j = 0
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for i in range(min(len(propline), len(line))):
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if propline[i] != p:
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if j < i:
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self.insert_prop(line[j:i], p)
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j = i
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p = propline[i]
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self.insert_prop(line[j:])
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self['cursor'] = save_cursor
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if not nextline:
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break
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self.parseline(nextline)
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self.endparser()
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self.update()
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def startparser(self):
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self.lineno = 0
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self.ok = 0
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self.empty = 0
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self.buffer = None
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def endparser(self):
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if self.buffer:
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self.parseline('')
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del self.ok, self.empty, self.buffer
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def parseline(self, nextline):
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if not self.buffer:
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# Save this line -- we need one line read-ahead
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self.buffer = nextline
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return
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if emptyprog.match(self.buffer) >= 0:
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# Buffered line was empty -- set a flag
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self.empty = 1
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self.buffer = nextline
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return
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textline = self.buffer
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if ulprog.match(nextline) >= 0:
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# Next line is properties for buffered line
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propline = nextline
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self.buffer = None
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else:
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# Next line is read-ahead
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propline = None
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self.buffer = nextline
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if not self.ok:
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# First non blank line after footer must be header
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# -- skip that too
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self.ok = 1
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self.empty = 0
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return
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if footerprog.match(textline) >= 0:
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# Footer -- start skipping until next non-blank line
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self.ok = 0
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self.empty = 0
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return
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if self.empty:
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# One or more previous lines were empty
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# -- insert one blank line in the text
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self.insert_prop('\n')
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self.lineno = self.lineno + 1
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self.empty = 0
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if not propline:
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# No properties
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self.insert_prop(textline)
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self.lineno = self.lineno + 1
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return
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# Search for properties
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p = ''
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j = 0
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for i in range(min(len(propline), len(textline))):
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if propline[i] != p:
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if j < i:
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self.insert_prop(textline[j:i], p)
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j = i
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p = propline[i]
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self.insert_prop(textline[j:])
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self.lineno = self.lineno + 1
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def insert_prop(self, str, prop = ' '):
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here = self.index(AtInsert())
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self.insert(AtInsert(), str)
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for tag in self.tagmap.values():
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self.tag_remove(tag, here, AtInsert())
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if self.tagmap.has_key(prop):
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self.tag_add(self.tagmap[prop], here, AtInsert())
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self.insert(AtInsert(), str[0])
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tags = self.tag_names(here)
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for tag in tags:
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self.tag_remove(tag, here)
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if prop != ' ':
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self.tag_add(prop, here)
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self.insert(AtInsert(), str[1:])
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# Readonly Man Page class -- disables editing, otherwise the same
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class ReadonlyManPage(EditableManPage):
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