Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/usr/lib/python2.4/formatter.pyc

Python Compiled Bytecode | 2005-10-18 | 17KB | 616 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 2.4)

"""Generic output formatting.

Formatter objects transform an abstract flow of formatting events into
specific output events on writer objects. Formatters manage several stack
structures to allow various properties of a writer object to be changed and
restored; writers need not be able to handle relative changes nor any sort
of ``change back'' operation. Specific writer properties which may be
controlled via formatter objects are horizontal alignment, font, and left
margin indentations. A mechanism is provided which supports providing
arbitrary, non-exclusive style settings to a writer as well. Additional
interfaces facilitate formatting events which are not reversible, such as
paragraph separation.

Writer objects encapsulate device interfaces. Abstract devices, such as
file formats, are supported as well as physical devices. The provided
implementations all work with abstract devices. The interface makes
available mechanisms for setting the properties which formatter objects
manage and inserting data into the output.
"""
import sys
AS_IS = None

class NullFormatter:
    """A formatter which does nothing.

    If the writer parameter is omitted, a NullWriter instance is created.
    No methods of the writer are called by NullFormatter instances.

    Implementations should inherit from this class if implementing a writer
    interface but don't need to inherit any implementation.

    """

    def __init__(self, writer = None):
        if writer is None:
            writer = NullWriter()

        self.writer = writer


    def end_paragraph(self, blankline):
        pass


    def add_line_break(self):
        pass


    def add_hor_rule(self, *args, **kw):
        pass


    def add_label_data(self, format, counter, blankline = None):
        pass


    def add_flowing_data(self, data):
        pass


    def add_literal_data(self, data):
        pass


    def flush_softspace(self):
        pass


    def push_alignment(self, align):
        pass


    def pop_alignment(self):
        pass


    def push_font(self, x):
        pass


    def pop_font(self):
        pass


    def push_margin(self, margin):
        pass


    def pop_margin(self):
        pass


    def set_spacing(self, spacing):
        pass


    def push_style(self, *styles):
        pass


    def pop_style(self, n = 1):
        pass


    def assert_line_data(self, flag = 1):
        pass



class AbstractFormatter:
    '''The standard formatter.

    This implementation has demonstrated wide applicability to many writers,
    and may be used directly in most circumstances.  It has been used to
    implement a full-featured World Wide Web browser.

    '''

    def __init__(self, writer):
        self.writer = writer
        self.align = None
        self.align_stack = []
        self.font_stack = []
        self.margin_stack = []
        self.spacing = None
        self.style_stack = []
        self.nospace = 1
        self.softspace = 0
        self.para_end = 1
        self.parskip = 0
        self.hard_break = 1
        self.have_label = 0


    def end_paragraph(self, blankline):
        if not self.hard_break:
            self.writer.send_line_break()
            self.have_label = 0

        if self.parskip < blankline and not (self.have_label):
            self.writer.send_paragraph(blankline - self.parskip)
            self.parskip = blankline
            self.have_label = 0

        self.hard_break = self.nospace = self.para_end = 1
        self.softspace = 0


    def add_line_break(self):
        if not self.hard_break or self.para_end:
            self.writer.send_line_break()
            self.have_label = self.parskip = 0

        self.hard_break = self.nospace = 1
        self.softspace = 0


    def add_hor_rule(self, *args, **kw):
        if not self.hard_break:
            self.writer.send_line_break()

        self.writer.send_hor_rule(*args, **kw)
        self.hard_break = self.nospace = 1
        self.have_label = self.para_end = self.softspace = self.parskip = 0


    def add_label_data(self, format, counter, blankline = None):
        if self.have_label or not (self.hard_break):
            self.writer.send_line_break()

        if not self.para_end:
            if not blankline or 1:
                pass
            self.writer.send_paragraph(0)

        if isinstance(format, str):
            self.writer.send_label_data(self.format_counter(format, counter))
        else:
            self.writer.send_label_data(format)
        self.nospace = self.have_label = self.hard_break = self.para_end = 1
        self.softspace = self.parskip = 0


    def format_counter(self, format, counter):
        label = ''
        for c in format:
            None if c == '1' else counter > 0
            if c in 'iI':
                if counter > 0:
                    label = label + self.format_roman(c, counter)

            counter > 0
            label = label + c

        return label


    def format_letter(self, case, counter):
        label = ''
        while counter > 0:
            (counter, x) = divmod(counter - 1, 26)
            s = chr(ord(case) + x)
            label = s + label
        return label


    def format_roman(self, case, counter):
        ones = [
            'i',
            'x',
            'c',
            'm']
        fives = [
            'v',
            'l',
            'd']
        (label, index) = ('', 0)
        while counter > 0:
            (counter, x) = divmod(counter, 10)
            if x == 9:
                label = ones[index] + ones[index + 1] + label
            elif x == 4:
                label = ones[index] + fives[index] + label
            elif x >= 5:
                s = fives[index]
                x = x - 5
            else:
                s = ''
            s = s + ones[index] * x
            label = s + label
            index = index + 1
        if case == 'I':
            return label.upper()

        return label


    def add_flowing_data(self, data):
        if not data:
            return None

        prespace = data[:1].isspace()
        postspace = data[-1:].isspace()
        data = ' '.join(data.split())
        if self.nospace and not data:
            return None
        elif prespace or self.softspace:
            if not data:
                if not self.nospace:
                    self.softspace = 1
                    self.parskip = 0

                return None

            if not self.nospace:
                data = ' ' + data


        self.hard_break = self.nospace = self.para_end = self.parskip = self.have_label = 0
        self.softspace = postspace
        self.writer.send_flowing_data(data)


    def add_literal_data(self, data):
        if not data:
            return None

        if self.softspace:
            self.writer.send_flowing_data(' ')

        self.hard_break = data[-1:] == '\n'
        self.nospace = self.para_end = self.softspace = self.parskip = self.have_label = 0
        self.writer.send_literal_data(data)


    def flush_softspace(self):
        if self.softspace:
            self.hard_break = self.para_end = self.parskip = self.have_label = self.softspace = 0
            self.nospace = 1
            self.writer.send_flowing_data(' ')



    def push_alignment(self, align):
        if align and align != self.align:
            self.writer.new_alignment(align)
            self.align = align
            self.align_stack.append(align)
        else:
            self.align_stack.append(self.align)


    def pop_alignment(self):
        if self.align_stack:
            del self.align_stack[-1]

        if self.align_stack:
            self.align = align = self.align_stack[-1]
            self.writer.new_alignment(align)
        else:
            self.align = None
            self.writer.new_alignment(None)


    def push_font(self, .2):
        (size, i, b, tt) = .2
        if self.softspace:
            self.hard_break = self.para_end = self.softspace = 0
            self.nospace = 1
            self.writer.send_flowing_data(' ')

        if self.font_stack:
            (csize, ci, cb, ctt) = self.font_stack[-1]
            if size is AS_IS:
                size = csize

            if i is AS_IS:
                i = ci

            if b is AS_IS:
                b = cb

            if tt is AS_IS:
                tt = ctt


        font = (size, i, b, tt)
        self.font_stack.append(font)
        self.writer.new_font(font)


    def pop_font(self):
        if self.font_stack:
            del self.font_stack[-1]

        if self.font_stack:
            font = self.font_stack[-1]
        else:
            font = None
        self.writer.new_font(font)


    def push_margin(self, margin):
        self.margin_stack.append(margin)
        fstack = filter(None, self.margin_stack)
        if not margin and fstack:
            margin = fstack[-1]

        self.writer.new_margin(margin, len(fstack))


    def pop_margin(self):
        if self.margin_stack:
            del self.margin_stack[-1]

        fstack = filter(None, self.margin_stack)
        if fstack:
            margin = fstack[-1]
        else:
            margin = None
        self.writer.new_margin(margin, len(fstack))


    def set_spacing(self, spacing):
        self.spacing = spacing
        self.writer.new_spacing(spacing)


    def push_style(self, *styles):
        if self.softspace:
            self.hard_break = self.para_end = self.softspace = 0
            self.nospace = 1
            self.writer.send_flowing_data(' ')

        for style in styles:
            self.style_stack.append(style)

        self.writer.new_styles(tuple(self.style_stack))


    def pop_style(self, n = 1):
        del self.style_stack[-n:]
        self.writer.new_styles(tuple(self.style_stack))


    def assert_line_data(self, flag = 1):
        self.nospace = self.hard_break = not flag
        self.para_end = self.parskip = self.have_label = 0



class NullWriter:
    '''Minimal writer interface to use in testing & inheritance.

    A writer which only provides the interface definition; no actions are
    taken on any methods.  This should be the base class for all writers
    which do not need to inherit any implementation methods.

    '''

    def __init__(self):
        pass


    def flush(self):
        pass


    def new_alignment(self, align):
        pass


    def new_font(self, font):
        pass


    def new_margin(self, margin, level):
        pass


    def new_spacing(self, spacing):
        pass


    def new_styles(self, styles):
        pass


    def send_paragraph(self, blankline):
        pass


    def send_line_break(self):
        pass


    def send_hor_rule(self, *args, **kw):
        pass


    def send_label_data(self, data):
        pass


    def send_flowing_data(self, data):
        pass


    def send_literal_data(self, data):
        pass



class AbstractWriter(NullWriter):
    '''A writer which can be used in debugging formatters, but not much else.

    Each method simply announces itself by printing its name and
    arguments on standard output.

    '''

    def new_alignment(self, align):
        print 'new_alignment(%r)' % (align,)


    def new_font(self, font):
        print 'new_font(%r)' % (font,)


    def new_margin(self, margin, level):
        print 'new_margin(%r, %d)' % (margin, level)


    def new_spacing(self, spacing):
        print 'new_spacing(%r)' % (spacing,)


    def new_styles(self, styles):
        print 'new_styles(%r)' % (styles,)


    def send_paragraph(self, blankline):
        print 'send_paragraph(%r)' % (blankline,)


    def send_line_break(self):
        print 'send_line_break()'


    def send_hor_rule(self, *args, **kw):
        print 'send_hor_rule()'


    def send_label_data(self, data):
        print 'send_label_data(%r)' % (data,)


    def send_flowing_data(self, data):
        print 'send_flowing_data(%r)' % (data,)


    def send_literal_data(self, data):
        print 'send_literal_data(%r)' % (data,)



class DumbWriter(NullWriter):
    '''Simple writer class which writes output on the file object passed in
    as the file parameter or, if file is omitted, on standard output.  The
    output is simply word-wrapped to the number of columns specified by
    the maxcol parameter.  This class is suitable for reflowing a sequence
    of paragraphs.

    '''

    def __init__(self, file = None, maxcol = 72):
        if not file:
            pass
        self.file = sys.stdout
        self.maxcol = maxcol
        NullWriter.__init__(self)
        self.reset()


    def reset(self):
        self.col = 0
        self.atbreak = 0


    def send_paragraph(self, blankline):
        self.file.write('\n' * blankline)
        self.col = 0
        self.atbreak = 0


    def send_line_break(self):
        self.file.write('\n')
        self.col = 0
        self.atbreak = 0


    def send_hor_rule(self, *args, **kw):
        self.file.write('\n')
        self.file.write('-' * self.maxcol)
        self.file.write('\n')
        self.col = 0
        self.atbreak = 0


    def send_literal_data(self, data):
        self.file.write(data)
        i = data.rfind('\n')
        if i >= 0:
            self.col = 0
            data = data[i + 1:]

        data = data.expandtabs()
        self.col = self.col + len(data)
        self.atbreak = 0


    def send_flowing_data(self, data):
        if not data:
            return None

        if not self.atbreak:
            pass
        atbreak = data[0].isspace()
        col = self.col
        maxcol = self.maxcol
        write = self.file.write
        for word in data.split():
            if atbreak:
                if col + len(word) >= maxcol:
                    write('\n')
                    col = 0
                else:
                    write(' ')
                    col = col + 1

            write(word)
            col = col + len(word)
            atbreak = 1

        self.col = col
        self.atbreak = data[-1].isspace()



def test(file = None):
    w = DumbWriter()
    f = AbstractFormatter(w)
    if file is not None:
        fp = open(file)
    elif sys.argv[1:]:
        fp = open(sys.argv[1])
    else:
        fp = sys.stdin
    while None:
        line = fp.readline()
        if not line:
            break

        if line == '\n':
            f.end_paragraph(1)
            continue
        f.add_flowing_data(line)
    f.end_paragraph(0)

if __name__ == '__main__':
    test()