pmacs3/mode/dir.py

import commands, dirutil, grp, method, mode, os.path, pwd, re
import buffer, window
from lex import Grammar, PatternRule, RegionRule, PatternGroupRule
from point import Point
from method import Method, Argument

class PermGrammar(Grammar):
    rules = [
        PatternRule(r'sticky', r'[tT]'),
        PatternRule(r'setid', r'[sS]'),
        PatternRule(r'read', r'r'),
        PatternRule(r'write', r'w'),
        PatternRule(r'exec', r'x'),
    ]

class PathGrammar(Grammar):
    rules = [
        RegionRule(r'perm', r'(?<=^.)', PermGrammar, r' '),
        PatternGroupRule(r'fields', r'owner', r'[^ ]+ +', r'group', r'[^ ]+ +',
                         r'size', r'[^ ]+ +',
                         r'mtime', r'[A-Za-z]{3} [ 0-9]{2} [0-9]{2}:[0-9]{2} +',
                         r'name', r'[^\n]*',
        ),
    ]

class DirGrammar(Grammar):
    rules = [
        RegionRule(r'file', r'^-', PathGrammar, r'\n'),
        RegionRule(r'blk', r'^b', PathGrammar, r'\n'),
        RegionRule(r'chr', r'^c', PathGrammar, r'\n'),
        RegionRule(r'dir', r'^d', PathGrammar, r'\n'),
        RegionRule(r'lnk', r'^l', PathGrammar, r'\n'),
        RegionRule(r'fifo', r'^p', PathGrammar, r'\n'),
        RegionRule(r'sock', r'^s', PathGrammar, r'\n'),
        RegionRule(r'unk', r'^\?', PathGrammar, r'\n'),
    ]

class Dir(mode.Fundamental):
    modename = 'Dir'
    grammar = DirGrammar()
    colors = {
        'blk.start':  ('cyan', 'default'),
        'blk.name':   ('cyan', 'default'),
        'chr.start':  ('yellow', 'default'),
        'chr.name':   ('yellow', 'default'),
        'dir.start':  ('blue', 'default'),
        'dir.name':   ('blue', 'default'),
        'lnk.start':  ('green', 'default'),
        'lnk.name':   ('green', 'default'),
        'fifo.start': ('red', 'default'),
        'fifo.name':  ('red', 'default'),
        'sock.start': ('red', 'default'),
        'sock.name':  ('red', 'default'),
        'unk.start':  ('magenta', 'default'),
        'unk.name':   ('magenta', 'default'),

        'perm.setid':  ('yellow', 'default'),
        'perm.sticky': ('yellow', 'default'),
        'perm.read':   ('magenta', 'default'),
        'perm.write':  ('magenta', 'default'),
        'perm.exec':   ('magenta', 'default'),

        'owner': ('cyan', 'default'),
        'group': ('cyan', 'default'),
        'size':  ('yellow', 'default'),
        'mtime': ('green', 'default'),
    }
    def __init__(self, w):
        mode.Fundamental.__init__(self, w)
        self.add_action_and_bindings(RefreshView(), ('C-c r',))
        self.add_action_and_bindings(OpenPath(), ('RETURN',))
        self.add_action_and_bindings(DirGrep(), ('C-c G',))
        self.add_action_and_bindings(Chmod(), ('C-c m',))
        self.add_action_and_bindings(Chown(), ('C-c o',))
        self.add_action_and_bindings(Chgrp(), ('C-c g',))
        self.add_action_and_bindings(TouchPath(), ('C-c t',))
        self.add_action_and_bindings(RemovePath(), ('DELETE', 'BACKSPACE', 'C-d'))

class RefreshView(Method):
    def _execute(self, w, **vargs):
        t = dirutil.resolve_token(w)
        s = t.string
        w.buffer.reload()
        dirutil.find_name(w, s)
class OpenPath(Method):
    def _execute(self, w, **vargs):
        path = dirutil.resolve_path(w)
        w.set_error("opening %r" % path)
        w.application.methods['open-file'].execute(w, filename=path)
class DirGrep(Method):
    args = [Argument('pattern', datatype="str", prompt="Pattern: ")]
    def _execute(self, w, **vargs):
        cmd = 'grep -rEl %r %r' % (vargs['pattern'], w.buffer.path)
        (status, output) = commands.getstatusoutput(cmd)
        paths = output.split('\n')
        bufname = '*%s*' % self.name.title()
        b = buffer.PathListBuffer(bufname, paths)
        b.modename = 'dir'
        b.open()
        window.Window(b, w.application, height=0, width=0)
        w.application.add_buffer(b)
        w.application.switch_buffer(b)
        w.set_error("grep exited with %d" % status)

class DirCmd(Method):
    def _make_cmd(self, w, path, **vargs):
        return ''
    def _run(self, w, **vargs):
        basename = dirutil.resolve_name(w)
        path     = os.path.join(w.buffer.path, basename)
        cmd      = self._make_cmd(w, path, **vargs)
        (status, output) = commands.getstatusoutput(cmd)
        if status != 0:
            w.set_error("%s failed (exit %d)" % (self.name, status))
        #w.application.methods['refresh-view'].execute(w, filename=path)
        dirutil.find_name(w, basename)

class Chmod(DirCmd):
    args        = [Argument('mode', type=type(''), prompt="New Mode: ")]
    octal_re    = re.compile('^[0-7]{1,4}$')
    symbolic_re = re.compile('(?:[ugoa]*(?:[-+=](?:[rwxXst]*|[ugo]))+ *,?)+')
    def _make_cmd(self, w, path, **vargs):
        return 'chmod %r %r' % (vargs['mode'], path)
    def _execute(self, w, **vargs):
        if self.octal_re.match(vargs['mode']):
            pass
        elif self.symbolic_re.match(vargs['mode']):
            pass
        else:
            w.set_error("Not a valid mode: %r" % vargs['mode'])
        self._run(w, **vargs)

class Chown(DirCmd):
    args = [Argument('owner', type=type(''), prompt="New Owner: ")]
    def _make_cmd(self, w, path, **vargs):
        return 'chown %r %r' % (vargs['owner'], path)
    def _execute(self, w, **vargs):
        fields = vargs['owner'].split(':')
        if len(fields) == 1:
            (owner, group) = (fields[0], None)
        elif len(fields) == 2:
            (owner, group) = fields
        else:
            w.set_error("Malformed 'owner' argument: %r" % vargs['owner'])
            return
        if not dirutil.valid_owner(owner):
            w.set_error('User %r does not exist' % owner)
            return
        if group is not None and not dirutil.valid_group(group):
            w.set_error('Group %r does not exist' % group)
            return
        self._run(w, **vargs)
class Chgrp(DirCmd):
    args = [Argument('group', type=type(''), prompt="New Group: ")]
    def _make_cmd(self, w, path, **vargs):
        return 'chgrp %r %r' % (vargs['group'], path)
    def _execute(self, w, **vargs):
        if not dirutil.valid_group(vargs['group']):
            w.set_error('Group %r does not exist' % group)
            return
        self._run(w, **vargs)

class TouchPath(Method):
    args = [Argument('filename', datatype="path", prompt="Touch File: ")]
    def _execute(self, w, **vargs):
        basename = vargs['filename']
        path = os.path.join(w.buffer.path, basename)
        retval = os.system('touch %r' % path)
        w.application.methods['refresh-view'].execute(w, filename=path)
        dirutil.find_name(w, basename)
        if retval != 0:
            w.set_error("touch %r failed (exit %d)" % (path, retval))
class RemovePath(Method):
    def _execute(self, w, **vargs):
        self._old_window = w
        self._old_path   = dirutil.resolve_path(w)
        basename         = os.path.basename(self._old_path)
        self._prompt     = "Do you want to delete %r? " % basename
        w.application.open_mini_buffer(self._prompt, self._callback)
    def _callback(self, v):
        a = self._old_window.application
        if v == 'yes':
            self._doit()
            a.close_mini_buffer()
            return
        if v == 'no':
            a.close_mini_buffer()
            return
        a.open_mini_buffer(self._prompt, self._callback)
        a.set_error('Please type "yes" or "no"')
    def _doit(self):
        w    = self._old_window
        path = self._old_path
        try:
            w.application.methods['previous-line'].execute(w)
            os.remove(path)
            w.set_error("deleted %r " % path)
            w.application.methods['refresh-view'].execute(w, filename=path)
        except:
            w.set_error("failed to delete %r" % path)

install = Dir.install