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Files and Folders in: //opt/alt/python33/lib64/python3.3/idlelib

NameTypeSizeLast ModifiedActions
Icons Directory - -
__pycache__ Directory - -
idle_test Directory - -
AutoComplete.py File 9082 bytes April 17 2024 16:58:17.
AutoCompleteWindow.py File 17672 bytes April 17 2024 16:58:17.
AutoExpand.py File 2483 bytes April 17 2024 16:58:17.
Bindings.py File 3434 bytes April 17 2024 16:58:17.
CREDITS.txt File 1865 bytes September 19 2017 07:32:02.
CallTipWindow.py File 5899 bytes April 17 2024 16:58:17.
CallTips.py File 5932 bytes April 17 2024 16:58:17.
ChangeLog File 56393 bytes September 19 2017 07:32:02.
ClassBrowser.py File 6371 bytes April 17 2024 16:58:17.
CodeContext.py File 8353 bytes April 17 2024 16:58:17.
ColorDelegator.py File 10467 bytes April 17 2024 16:58:17.
Debugger.py File 16367 bytes April 17 2024 16:58:17.
Delegator.py File 665 bytes April 17 2024 16:58:17.
EditorWindow.py File 66307 bytes April 17 2024 16:58:17.
FileList.py File 3814 bytes April 17 2024 16:58:17.
FormatParagraph.py File 7166 bytes April 17 2024 16:58:17.
GrepDialog.py File 4111 bytes April 17 2024 16:58:17.
HISTORY.txt File 10317 bytes September 19 2017 07:32:02.
HyperParser.py File 10562 bytes April 17 2024 16:58:17.
IOBinding.py File 19862 bytes April 17 2024 16:58:17.
IdleHistory.py File 4117 bytes April 17 2024 16:58:17.
MultiCall.py File 17529 bytes April 17 2024 16:58:17.
MultiStatusBar.py File 783 bytes April 17 2024 16:58:17.
NEWS.txt File 34417 bytes September 19 2017 07:32:02.
ObjectBrowser.py File 3749 bytes April 17 2024 16:58:17.
OutputWindow.py File 4394 bytes April 17 2024 16:58:17.
ParenMatch.py File 6627 bytes April 17 2024 16:58:17.
PathBrowser.py File 2878 bytes April 17 2024 16:58:17.
Percolator.py File 2658 bytes April 17 2024 16:58:17.
PyParse.py File 19414 bytes April 17 2024 16:58:17.
PyShell.py File 57877 bytes April 17 2024 16:58:17.
README.txt File 2502 bytes September 19 2017 07:32:02.
RemoteDebugger.py File 12029 bytes April 17 2024 16:58:17.
RemoteObjectBrowser.py File 964 bytes April 17 2024 16:58:17.
ReplaceDialog.py File 5829 bytes April 17 2024 16:58:17.
RstripExtension.py File 1050 bytes April 17 2024 16:58:17.
ScriptBinding.py File 8069 bytes April 17 2024 16:58:17.
ScrolledList.py File 3997 bytes April 17 2024 16:58:17.
SearchDialog.py File 2016 bytes April 17 2024 16:58:17.
SearchDialogBase.py File 5185 bytes April 17 2024 16:58:17.
SearchEngine.py File 7544 bytes April 17 2024 16:58:17.
StackViewer.py File 3567 bytes April 17 2024 16:58:17.
TODO.txt File 8478 bytes September 19 2017 07:32:02.
ToolTip.py File 2736 bytes April 17 2024 16:58:17.
TreeWidget.py File 15220 bytes April 17 2024 16:58:17.
UndoDelegator.py File 10305 bytes April 17 2024 16:58:17.
WidgetRedirector.py File 4477 bytes April 17 2024 16:58:17.
WindowList.py File 2472 bytes April 17 2024 16:58:17.
ZoomHeight.py File 1307 bytes April 17 2024 16:58:17.
__init__.py File 37 bytes April 17 2024 16:58:17.
__main__.py File 109 bytes April 17 2024 16:58:17.
aboutDialog.py File 6575 bytes April 17 2024 16:58:17.
config-extensions.def File 2788 bytes September 19 2017 07:32:02.
config-highlight.def File 1740 bytes September 19 2017 07:32:02.
config-keys.def File 7524 bytes September 19 2017 07:32:02.
config-main.def File 2514 bytes September 19 2017 07:32:02.
configDialog.py File 52850 bytes April 17 2024 16:58:17.
configHandler.py File 29323 bytes April 17 2024 16:58:17.
configHelpSourceEdit.py File 6725 bytes April 17 2024 16:58:17.
configSectionNameDialog.py File 4314 bytes April 17 2024 16:58:17.
dynOptionMenuWidget.py File 1308 bytes April 17 2024 16:58:17.
extend.txt File 3642 bytes September 19 2017 07:32:02.
help.txt File 11994 bytes September 19 2017 07:32:02.
idle.py File 400 bytes April 17 2024 16:58:17.
idle.pyw File 671 bytes September 19 2017 07:32:02.
idlever.py File 23 bytes April 17 2024 16:58:17.
keybindingDialog.py File 12427 bytes April 17 2024 16:58:17.
macosxSupport.py File 7172 bytes April 17 2024 16:58:17.
rpc.py File 20953 bytes April 17 2024 16:58:17.
run.py File 13694 bytes April 17 2024 16:58:17.
tabbedpages.py File 18167 bytes April 17 2024 16:58:17.
textView.py File 3545 bytes April 17 2024 16:58:17.

Reading File: //opt/alt/python33/lib64/python3.3/idlelib/FormatParagraph.py

"""Extension to format a paragraph or selection to a max width.

Does basic, standard text formatting, and also understands Python
comment blocks. Thus, for editing Python source code, this
extension is really only suitable for reformatting these comment
blocks or triple-quoted strings.

Known problems with comment reformatting:
* If there is a selection marked, and the first line of the
  selection is not complete, the block will probably not be detected
  as comments, and will have the normal "text formatting" rules
  applied.
* If a comment block has leading whitespace that mixes tabs and
  spaces, they will not be considered part of the same block.
* Fancy comments, like this bulleted list, aren't handled :-)
"""

import re
from idlelib.configHandler import idleConf

class FormatParagraph:

    menudefs = [
        ('format', [   # /s/edit/format   dscherer@cmu.edu
            ('Format Paragraph', '<<format-paragraph>>'),
         ])
    ]

    def __init__(self, editwin):
        self.editwin = editwin

    def close(self):
        self.editwin = None

    def format_paragraph_event(self, event):
        """Formats paragraph to a max width specified in idleConf.

        If text is selected, format_paragraph_event will start breaking lines
        at the max width, starting from the beginning selection.

        If no text is selected, format_paragraph_event uses the current
        cursor location to determine the paragraph (lines of text surrounded
        by blank lines) and formats it.
        """
        maxformatwidth = idleConf.GetOption(
                'main', 'FormatParagraph', 'paragraph', type='int')
        text = self.editwin.text
        first, last = self.editwin.get_selection_indices()
        if first and last:
            data = text.get(first, last)
            comment_header = get_comment_header(data)
        else:
            first, last, comment_header, data = \
                    find_paragraph(text, text.index("insert"))
        if comment_header:
            newdata = reformat_comment(data, maxformatwidth, comment_header)
        else:
            newdata = reformat_paragraph(data, maxformatwidth)
        text.tag_remove("sel", "1.0", "end")

        if newdata != data:
            text.mark_set("insert", first)
            text.undo_block_start()
            text.delete(first, last)
            text.insert(first, newdata)
            text.undo_block_stop()
        else:
            text.mark_set("insert", last)
        text.see("insert")
        return "break"

def find_paragraph(text, mark):
    """Returns the start/stop indices enclosing the paragraph that mark is in.

    Also returns the comment format string, if any, and paragraph of text
    between the start/stop indices.
    """
    lineno, col = map(int, mark.split("."))
    line = text.get("%d.0" % lineno, "%d.end" % lineno)

    # Look for start of next paragraph if the index passed in is a blank line
    while text.compare("%d.0" % lineno, "<", "end") and is_all_white(line):
        lineno = lineno + 1
        line = text.get("%d.0" % lineno, "%d.end" % lineno)
    first_lineno = lineno
    comment_header = get_comment_header(line)
    comment_header_len = len(comment_header)

    # Once start line found, search for end of paragraph (a blank line)
    while get_comment_header(line)==comment_header and \
              not is_all_white(line[comment_header_len:]):
        lineno = lineno + 1
        line = text.get("%d.0" % lineno, "%d.end" % lineno)
    last = "%d.0" % lineno

    # Search back to beginning of paragraph (first blank line before)
    lineno = first_lineno - 1
    line = text.get("%d.0" % lineno, "%d.end" % lineno)
    while lineno > 0 and \
              get_comment_header(line)==comment_header and \
              not is_all_white(line[comment_header_len:]):
        lineno = lineno - 1
        line = text.get("%d.0" % lineno, "%d.end" % lineno)
    first = "%d.0" % (lineno+1)

    return first, last, comment_header, text.get(first, last)

# This should perhaps be replaced with textwrap.wrap
def reformat_paragraph(data, limit):
    """Return data reformatted to specified width (limit)."""
    lines = data.split("\n")
    i = 0
    n = len(lines)
    while i < n and is_all_white(lines[i]):
        i = i+1
    if i >= n:
        return data
    indent1 = get_indent(lines[i])
    if i+1 < n and not is_all_white(lines[i+1]):
        indent2 = get_indent(lines[i+1])
    else:
        indent2 = indent1
    new = lines[:i]
    partial = indent1
    while i < n and not is_all_white(lines[i]):
        # XXX Should take double space after period (etc.) into account
        words = re.split("(\s+)", lines[i])
        for j in range(0, len(words), 2):
            word = words[j]
            if not word:
                continue # Can happen when line ends in whitespace
            if len((partial + word).expandtabs()) > limit and \
                   partial != indent1:
                new.append(partial.rstrip())
                partial = indent2
            partial = partial + word + " "
            if j+1 < len(words) and words[j+1] != " ":
                partial = partial + " "
        i = i+1
    new.append(partial.rstrip())
    # XXX Should reformat remaining paragraphs as well
    new.extend(lines[i:])
    return "\n".join(new)

def reformat_comment(data, limit, comment_header):
    """Return data reformatted to specified width with comment header."""

    # Remove header from the comment lines
    lc = len(comment_header)
    data = "\n".join(line[lc:] for line in data.split("\n"))
    # Reformat to maxformatwidth chars or a 20 char width,
    # whichever is greater.
    format_width = max(limit - len(comment_header), 20)
    newdata = reformat_paragraph(data, format_width)
    # re-split and re-insert the comment header.
    newdata = newdata.split("\n")
    # If the block ends in a \n, we dont want the comment prefix
    # inserted after it. (Im not sure it makes sense to reformat a
    # comment block that is not made of complete lines, but whatever!)
    # Can't think of a clean solution, so we hack away
    block_suffix = ""
    if not newdata[-1]:
        block_suffix = "\n"
        newdata = newdata[:-1]
    return '\n'.join(comment_header+line for line in newdata) + block_suffix

def is_all_white(line):
    """Return True if line is empty or all whitespace."""

    return re.match(r"^\s*$", line) is not None

def get_indent(line):
    """Return the initial space or tab indent of line."""
    return re.match(r"^([ \t]*)", line).group()

def get_comment_header(line):
    """Return string with leading whitespace and '#' from line or ''.

    A null return indicates that the line is not a comment line. A non-
    null return, such as '    #', will be used to find the other lines of
    a comment block with the same  indent.
    """
    m = re.match(r"^([ \t]*#*)", line)
    if m is None: return ""
    return m.group(1)

if __name__ == "__main__":
    from test import support; support.use_resources = ['gui']
    import unittest
    unittest.main('idlelib.idle_test.test_formatparagraph',
            verbosity=2, exit=False)

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