597 lines
20 KiB
Python
597 lines
20 KiB
Python
import datetime, md5, os, pwd, re, sets, shutil, stat
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import aes, regex, highlight2
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from point2 import Point
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# undo/redo stack constants
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ACT_NORM = 0
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ACT_UNDO = 1
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ACT_REDO = 2
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STACK_LIMIT = 1024
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# used for undo/redo stacks when text will need to be added back
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class AddMove:
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def __init__(self, buffer, p, lines):
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self.buffer = buffer
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self.p = p
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self.lines = lines
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def restore(self, act=ACT_UNDO):
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assert act == ACT_UNDO or act == ACT_REDO
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self.buffer.insert_lines(self.p, self.lines, act)
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def getpos(self):
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return self.p
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# used for undo/redo stacks when text will need to be removed
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class DelMove:
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def __init__(self, buffer, p1, p2):
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self.buffer = buffer
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self.p1 = p1
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self.p2 = p2
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def restore(self, act):
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assert act == ACT_UNDO or act == ACT_REDO
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self.buffer.delete(self.p1, self.p2, act)
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def getpos(self):
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return self.p1
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# abstract class
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class Buffer(object):
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btype = 'generic'
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def __init__(self, nl='\n', stack_limit=STACK_LIMIT):
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assert nl in ('\n', '\r', '\r\n'), "Invalid line ending"
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self.lines = [""]
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self.windows = []
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self.undo_stack = []
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self.redo_stack = []
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self.stack_limit = stack_limit
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self.nl = nl
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self.modified = False
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self.highlights = {}
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# basic file operation stuff
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def _open_file_r(self, path):
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path = os.path.realpath(path)
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if not os.path.isfile(path):
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raise Exception, "Path '%s' does not exist" % (path)
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if not os.access(path, os.R_OK):
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raise Exception, "Path '%s' cannot be read" % (path)
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f = open(path, 'r')
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return f
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def _open_file_w(self, path):
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if os.path.isfile(path):
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raise Exception, "Path '%s' already exists" % (path)
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d = os.path.dirname(path)
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if not os.access(d, os.R_OK):
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raise Exception, "Dir '%s' cannot be read" % (path)
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if not os.access(d, os.W_OK):
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raise Exception, "Dir '%s' cannot be written" % (path)
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f = open(path, 'w')
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return f
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def _temp_path(self, path):
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(dirname, basename) = os.path.split(path)
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return os.path.join(dirname, ".__%s__pmacs" % (basename))
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# undo/redo stack
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def _stack_trim(self, stack):
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if self.stack_limit:
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while len(stack) > self.stack_limit:
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stack.pop(0)
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def add_to_stack(self, move, act):
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if act == ACT_NORM:
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self.redo_stack = []
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self.undo_stack.append(move)
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self._stack_trim(self.undo_stack)
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elif act == ACT_UNDO:
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self.redo_stack.append(move)
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self._stack_trim(self.redo_stack)
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elif act == ACT_REDO:
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self.undo_stack.append(move)
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self._stack_trim(self.undo_stack)
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else:
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raise Exception, "Invalid act: %d" % (act)
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def undo(self):
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if len(self.undo_stack):
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move = self.undo_stack.pop(-1)
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move.restore(ACT_UNDO)
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return move.getpos()
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else:
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raise Exception, "Nothing to Undo!"
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def redo(self):
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if len(self.redo_stack):
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move = self.redo_stack.pop(-1)
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move.restore(ACT_REDO)
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return move.getpos()
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else:
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raise Exception, "Nothing to Redo!"
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# window-buffer communication
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def add_window(self, w):
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if w not in self.windows:
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self.windows.append(w)
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modename = w.mode.name()
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if modename not in self.highlights and w.mode.lexer is not None:
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self.highlights[modename] = highlight2.Highlighter(w.mode.lexer)
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self.highlights[modename].highlight(self.lines)
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#if modename not in self.tabbing and w.mode.tabber is not None:
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# self.tabbing[modename] =
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def remove_window(self, w):
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if w in self.windows:
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self.windows.remove(w)
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modename = w.mode.name()
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found = False
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for w2 in self.windows:
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if w2.mode.name() == modename:
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found = True
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break
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if not found:
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del self.highlights[modename]
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def _region_add(self, p1, p2, lines, act):
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move = DelMove(self, p1, p2)
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self.add_to_stack(move, act)
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for w in self.windows:
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w.region_added(p1, lines)
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for name in self.highlights:
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self.highlights[name].relex_add(self.lines, p1.y, p1.x, lines)
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def _region_del(self, p1, p2, lines, act):
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move = AddMove(self, p1, lines)
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self.add_to_stack(move, act)
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for w in self.windows:
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w.region_removed(p1, p2)
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for name in self.highlights:
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self.highlights[name].relex_del(self.lines, p1.y, p1.x, p2.y, p2.x)
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# internal validation
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def _validate_point(self, p):
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self._validate_xy(p.x, p.y)
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def _validate_xy(self, x, y):
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assert y >= 0 and y < len(self.lines), \
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"xy1: %d >= 0 and %d < %d" % (y, y, len(self.lines))
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assert x >= 0 and x <= len(self.lines[y]), \
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"xy2: %d >= 0 and %d <= %d" % (x, x, len(self.lines[y]))
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def _validate_y(self, y):
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assert y >= 0 and y < len(self.lines), \
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"y: %d >= 0 and %d < %d" % (y, y, len(self.lines))
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# deal with the actual logical document string
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def num_chars(self):
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n = 0
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for line in self.lines[:-1]:
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n += len(line) + 1
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n += len(self.lines[-1])
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return n
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def num_lines(self):
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return len(self.lines)
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def make_string(self, nl='\n'):
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return nl.join(self.lines)
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# methods to be overridden by subclasses
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def name(self):
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return "Generic"
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def close(self):
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pass
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def open(self):
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pass
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def changed(self):
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return self.modified
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def reload(self):
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raise Exception, "%s reload: Unimplemented" % (self.name())
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def save_as(self, path, force=False):
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# check to see if the path exists, and if we're prepared to overwrite it
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# if yes to both, get its mode so we can preserve the path's permissions
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mode = None
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if os.path.exists(path):
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if force:
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mode = os.stat(self.path)[0]
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else:
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raise Exception, "oh no! %r already exists" % path
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# create the string that we're going to write into the file
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data = self.write_filter(self.make_string(nl=self.nl))
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# create a safe temporary path to write to, and write out data to it
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temp_path = self._temp_path()
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f2 = self._open_file_w(temp_path)
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f2.write(data)
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f2.close()
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# move the temporary file to the actual path; maybe change permissions
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shutil.move(temp_path, path)
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if mode:
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os.chmod(path, mode)
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# the file has not been modified now
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self.modified = False
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def readonly(self):
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return False
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def read_filter(self, data):
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return data
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def write_filter(self, data):
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return data
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# point retrieval
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def get_buffer_start(self):
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return Point(0, 0)
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def get_buffer_end(self):
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return Point(len(self.lines[-1]), len(self.lines) - 1)
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# data retrieval
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def get_sublines(self, p1, p2):
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self._validate_point(p1)
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self._validate_point(p2)
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assert p1 <= p2, "p1.x (%d) > p2.x (%d)" % (p1.x, p2.x)
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lines = []
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x = p1.x
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for i in range(p1.y, p2.y):
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lines.append(self.lines[i][x:])
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x = 0
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lines.append(self.lines[p2.y][x:p2.x])
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return lines
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def get_substring(self, p1, p2):
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lines = self.get_sublines(p1, p2)
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return '\n'.join(lines)
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# buffer set
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def set_lines(self, lines, force=False):
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if not force and self.readonly():
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raise Exception, "set_data: buffer is readonly"
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start = self.get_buffer_start()
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end = self.get_buffer_end()
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self.delete(start, end, force=force)
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self.insert_lines(start, lines, force=force)
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self.modified = True
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def set_data(self, data, force=False):
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lines = data.split('\n')
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self.set_lines(lines, force)
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# insertion into buffer
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def insert_lines(self, p, lines, act=ACT_NORM, force=False):
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#if lines == ['(']:
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# raise Exception, "damn"
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llen = len(lines)
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assert llen > 0
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if not force:
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assert not self.readonly(), "insert_string: buffer is read-only"
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p2 = p.vadd(len(lines[-1]), llen - 1)
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if llen > 1:
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self.lines.insert(p.y + 1, [])
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self.lines[p.y + 1] = lines[-1] + self.lines[p.y][p.x:]
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self.lines[p.y] = self.lines[p.y][:p.x] + lines[0]
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for i in range(1, llen - 1):
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self.lines.insert(p.y + i, lines[i])
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else:
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self.lines[p.y] = self.lines[p.y][:p.x] + lines[-1] + self.lines[p.y][p.x:]
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self._region_add(p, p2, lines, act)
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self.modified = True
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def insert_string(self, p, s, act=ACT_NORM, force=False):
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lines = s.split("\n")
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self.insert_lines(p, lines, act, force)
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# deletion from buffer
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def delete(self, p1, p2, act=ACT_NORM, force=False):
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"""delete characters from p1 up to p2 from the buffer"""
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if not force:
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assert not self.readonly(), "delete_string: buffer is read-only"
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self._validate_point(p1)
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self._validate_point(p2)
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if p1 == p2:
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return
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assert p1 < p2, "p1 %r > p2 %r" % (p1, p2)
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lines = self.get_sublines(p1, p2)
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line1 = self.lines[p1.y]
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line2 = self.lines[p2.y]
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self.lines[p1.y:p2.y+1] = ["%s%s" % (line1[:p1.x], line2[p2.x:])]
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self._region_del(p1, p2, lines, act)
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self.modified = True
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def delete_char(self, p, act=ACT_NORM, force=False):
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if p.x == len(self.lines[p.y]):
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p2 = Point(0, p.y + 1)
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else:
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p2 = Point(p.x + 1, p.y)
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self.delete(p, p2, act, force)
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# random
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def count_leading_whitespace(self, y):
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line = self.lines[y]
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m = regex.leading_whitespace.match(line)
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if m:
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return m.end()
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else:
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# should not happen
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raise Exception, "iiiijjjj"
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# scratch is a singleton
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scratch = None
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class ScratchBuffer(Buffer):
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btype = 'scratch'
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def __new__(cls, *args, **kwargs):
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global scratch
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if scratch is None:
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scratch = object.__new__(ScratchBuffer, *args, **kwargs)
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return scratch
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def name(self):
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return "*Scratch*"
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def close(self):
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global scratch
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scratch = None
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class DataBuffer(Buffer):
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btype = 'data'
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def __init__(self, name, data, nl='\n'):
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Buffer.__init__(self, nl)
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self._name = name
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self.lines = data.split("\n")
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def name(self):
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return self._name
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def close(self):
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pass
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def readonly(self):
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return True
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# console is another singleton
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console = None
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class ConsoleBuffer(Buffer):
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btype = 'console'
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def __new__(cls, *args, **kwargs):
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global console
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if console is None:
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b = object.__new__(ConsoleBuffer, *args, **kwargs)
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console = b
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return console
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def __init__(self, nl='\n'):
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Buffer.__init__(self, nl)
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self.clear()
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def clear(self):
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lines = ['Python Console\n',
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"Evaluate python expressions in the editor's context (self)\n",
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'Press Control-] to exit\n',
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'\n']
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console.set_data(''.join(lines), force=True)
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def name(self):
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return '*Console*'
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def changed(self):
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return False
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def close(self):
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global console
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console = None
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def readonly(self):
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return True
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class FileBuffer(Buffer):
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btype = 'file'
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def __init__(self, path, nl='\n', name=None):
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'''fb = FileBuffer(path)'''
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Buffer.__init__(self, nl)
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self.path = os.path.realpath(path)
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self.checksum = None
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if name is None:
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self._name = os.path.basename(self.path)
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else:
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self._name = name
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if os.path.exists(self.path) and not os.access(self.path, os.W_OK):
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self._readonly = True
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else:
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self._readonly = False
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def readonly(self):
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return self._readonly
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def _open_file_r(self, path=None):
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if path is None:
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path = self.path
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path = os.path.realpath(path)
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self.path = path
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if not os.path.isfile(path):
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raise Exception, "Path '%s' does not exist" % (path)
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if not os.access(path, os.R_OK):
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raise Exception, "Path '%s' cannot be read" % (path)
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f = open(path, 'r')
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return f
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def _open_file_w(self, path=None):
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if path is None:
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path = self.path
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if os.path.isfile(path):
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raise Exception, "Path '%s' already exists" % (path)
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d = os.path.dirname(path)
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if not os.access(d, os.R_OK):
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raise Exception, "Dir '%s' cannot be read" % (path)
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if not os.access(d, os.W_OK):
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raise Exception, "Dir '%s' cannot be written" % (path)
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f = open(path, 'w')
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return f
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def _temp_path(self, path=None):
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if path is None:
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path = self.path
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(dirname, basename) = os.path.split(path)
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return os.path.join(dirname, ".__%s__pmacs" % (basename))
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# methods for dealing with the underlying resource, etc.
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def name(self):
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#return self.path
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return self._name
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def path_exists(self):
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return os.path.exists(self.path)
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def store_checksum(self, data):
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self.checksum = md5.new(data)
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def read(self):
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if self.path_exists():
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f = self._open_file_r()
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data = f.read()
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f.close()
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self.store_checksum(data)
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else:
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data = ''
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for i in range(0, 8):
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if ord(data[i]) > 127:
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raise Exception, "editing binary files is not supported"
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data = self.read_filter(data)
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#FIXME: this is horrible...but maybe not as horrible as using tabs??
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data = data.replace("\t", " ")
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return data
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def open(self):
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data = self.read()
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self.lines = data.split(self.nl)
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def reload(self):
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self.open()
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def changed_on_disk(self):
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assert self.checksum is not None
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f = open(self.path)
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data = f.read()
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f.close()
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m = md5.new(data)
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return self.checksum.digest() != m.digest()
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def save(self, force=False):
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if self.readonly():
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raise Exception, "can't save a read-only file"
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if self.checksum is not None and force is False:
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# the file already existed and we took a checksum so make sure it's
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# still the same right now
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if not self.path_exists():
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raise Exception, "oh no! %r disappeared!" % self.path
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if self.changed_on_disk():
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raise Exception, "oh no! %r has changed on-disk!" % self.path
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temp_path = self._temp_path()
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data = self.make_string(nl=self.nl)
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data = self.write_filter(data)
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f2 = self._open_file_w(temp_path)
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f2.write(data)
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f2.close()
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if self.path_exists():
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mode = os.stat(self.path)[0]
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os.chmod(temp_path, mode)
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shutil.move(temp_path, self.path)
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self.store_checksum(data)
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self.modified = False
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def save_as(self, path):
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self.path = path
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self.save()
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class AesBuffer(FileBuffer):
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btype = 'aesfile'
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def __init__(self, path, password, nl='\n', name=None):
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'''fb = FileBuffer(path)'''
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FileBuffer.__init__(self, path, nl, name)
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self.password = password
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def read_filter(self, data):
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return aes.decrypt_data(data, self.password)
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def write_filter(self, data):
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return aes.encrypt_data(data, self.password)
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def _path_sort(a, b):
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try:
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x = cmp(a[0][0], b[0][0])
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if x != 0:
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return -x
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return cmp(a[5], b[5])
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except:
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raise Exception, repr(a) + ' ' + repr(b)
|
|
class DirBuffer(Buffer):
|
|
btype = 'dir'
|
|
def __init__(self, path, nl='\n', name=None):
|
|
Buffer.__init__(self, nl)
|
|
self.path = os.path.realpath(path)
|
|
if name is None:
|
|
self._name = os.path.basename(self.path)
|
|
else:
|
|
self._name = name
|
|
def readonly(self):
|
|
return True
|
|
def name(self):
|
|
return self._name
|
|
def path_exists(self):
|
|
return os.path.exists(self.path)
|
|
|
|
def open(self):
|
|
if not self.path_exists():
|
|
raise Exception, "directory %r does not exists" % self.path
|
|
|
|
names = os.listdir(self.path)
|
|
if self.path != '/':
|
|
names.insert(0, '..')
|
|
names.insert(0, '.')
|
|
|
|
lines = []
|
|
maxlens = [0] * 5
|
|
for name in names:
|
|
# let's escape some troublesome characters
|
|
name = re.sub(r'([\a\b\n\r\t\v])', r'\\\1', name)
|
|
|
|
path = os.path.join(self.path, name)
|
|
info = os.stat(path)
|
|
|
|
# - regular, b block, c character, d directory, l symlink, p fifo
|
|
# s socket, ? unknown
|
|
perm = [' '] * 10
|
|
if stat.S_ISREG(info.st_mode):
|
|
perm[0] = '-'
|
|
elif stat.S_ISBLK(info.st_mode):
|
|
perm[0] = 'b'
|
|
elif stat.S_ISCHR(info.st_mode):
|
|
perm[0] = 'c'
|
|
elif stat.S_ISDIR(info.st_mode):
|
|
perm[0] = 'd'
|
|
elif stat.S_ISLNK(info.st_mode):
|
|
perm[0] = 'l'
|
|
elif stat.S_ISFIFO(info.st_mode):
|
|
perm[0] = 'p'
|
|
elif stat.S_ISSOCK(info.st_mode):
|
|
perm[0] = 's'
|
|
else:
|
|
perm[0] = '?'
|
|
|
|
i = 1
|
|
symbols = ('r', 'w', 'x')
|
|
for bundle in ((stat.S_IRUSR, stat.S_IWUSR, stat.S_IXUSR),
|
|
(stat.S_IRGRP, stat.S_IWGRP, stat.S_IXGRP),
|
|
(stat.S_IROTH, stat.S_IWOTH, stat.S_IXOTH)):
|
|
for j in range(0, 3):
|
|
if info.st_mode & bundle[j]:
|
|
perm[i] = symbols[j]
|
|
else:
|
|
perm[i] = '-'
|
|
i += 1
|
|
perms = ''.join(perm)
|
|
|
|
try:
|
|
usr = pwd.getpwuid(info.st_uid)[0]
|
|
except:
|
|
usr = str(info.st_uid)
|
|
try:
|
|
grp = pwd.getpwuid(info.st_gid)[0]
|
|
except:
|
|
grp = str(info.st_gid)
|
|
|
|
size = info.st_size
|
|
unit = 0
|
|
units = ('B', 'K', 'M', 'G',)
|
|
while unit < 3 and size > 1024:
|
|
size = size / 1024
|
|
unit += 1
|
|
size = '%d%s' % (size, units[unit])
|
|
|
|
mtime = datetime.datetime.fromtimestamp(info.st_mtime).strftime('%b %d %H:%M')
|
|
|
|
fields = (perms, usr, grp, size, mtime, name)
|
|
for i in range(0, 5):
|
|
try:
|
|
maxlens[i] = max(maxlens[i], len(fields[i]))
|
|
except:
|
|
raise Exception, '%d %r' % (i, fields[i])
|
|
lines.append(fields)
|
|
|
|
lines.sort(cmp=_path_sort)
|
|
|
|
fmt = '%%%ds %%-%ds %%-%ds %%%ds %%%ds %%s' % tuple(maxlens)
|
|
|
|
self.lines = []
|
|
for fields in lines:
|
|
s = fmt % fields
|
|
self.lines.append(s)
|
|
def reload(self):
|
|
self.open()
|
|
def save(self, force=False):
|
|
raise Exception, "can't save a directory buffer"
|
|
def save_as(self, path):
|
|
raise Exception, "can't save a directory buffer"
|