--- a/plugin/gundo.py Sat Jul 30 17:07:25 2011 +0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,573 +0,0 @@
-# ============================================================================
-# File: gundo.py
-# Description: vim global plugin to visualize your undo tree
-# Maintainer: Steve Losh <steve@stevelosh.com>
-# License: GPLv2+ -- look it up.
-# Notes: Much of this code was thiefed from Mercurial, and the rest was
-# heavily inspired by scratch.vim and histwin.vim.
-#
-# ============================================================================
-
-import difflib
-import itertools
-import sys
-import time
-import vim
-
-# Mercurial's graphlog code
-def asciiedges(seen, rev, parents):
- """adds edge info to changelog DAG walk suitable for ascii()"""
- if rev not in seen:
- seen.append(rev)
- nodeidx = seen.index(rev)
-
- knownparents = []
- newparents = []
- for parent in parents:
- if parent in seen:
- knownparents.append(parent)
- else:
- newparents.append(parent)
-
- ncols = len(seen)
- seen[nodeidx:nodeidx + 1] = newparents
- edges = [(nodeidx, seen.index(p)) for p in knownparents]
-
- if len(newparents) > 0:
- edges.append((nodeidx, nodeidx))
- if len(newparents) > 1:
- edges.append((nodeidx, nodeidx + 1))
-
- nmorecols = len(seen) - ncols
- return nodeidx, edges, ncols, nmorecols
-
-def get_nodeline_edges_tail(
- node_index, p_node_index, n_columns, n_columns_diff, p_diff, fix_tail):
- if fix_tail and n_columns_diff == p_diff and n_columns_diff != 0:
- # Still going in the same non-vertical direction.
- if n_columns_diff == -1:
- start = max(node_index + 1, p_node_index)
- tail = ["|", " "] * (start - node_index - 1)
- tail.extend(["/", " "] * (n_columns - start))
- return tail
- else:
- return ["\\", " "] * (n_columns - node_index - 1)
- else:
- return ["|", " "] * (n_columns - node_index - 1)
-
-def draw_edges(edges, nodeline, interline):
- for (start, end) in edges:
- if start == end + 1:
- interline[2 * end + 1] = "/"
- elif start == end - 1:
- interline[2 * start + 1] = "\\"
- elif start == end:
- interline[2 * start] = "|"
- else:
- nodeline[2 * end] = "+"
- if start > end:
- (start, end) = (end, start)
- for i in range(2 * start + 1, 2 * end):
- if nodeline[i] != "+":
- nodeline[i] = "-"
-
-def fix_long_right_edges(edges):
- for (i, (start, end)) in enumerate(edges):
- if end > start:
- edges[i] = (start, end + 1)
-
-def ascii(buf, state, type, char, text, coldata):
- """prints an ASCII graph of the DAG
-
- takes the following arguments (one call per node in the graph):
-
- - Somewhere to keep the needed state in (init to asciistate())
- - Column of the current node in the set of ongoing edges.
- - Type indicator of node data == ASCIIDATA.
- - Payload: (char, lines):
- - Character to use as node's symbol.
- - List of lines to display as the node's text.
- - Edges; a list of (col, next_col) indicating the edges between
- the current node and its parents.
- - Number of columns (ongoing edges) in the current revision.
- - The difference between the number of columns (ongoing edges)
- in the next revision and the number of columns (ongoing edges)
- in the current revision. That is: -1 means one column removed;
- 0 means no columns added or removed; 1 means one column added.
- """
-
- idx, edges, ncols, coldiff = coldata
- assert -2 < coldiff < 2
- if coldiff == -1:
- # Transform
- #
- # | | | | | |
- # o | | into o---+
- # |X / |/ /
- # | | | |
- fix_long_right_edges(edges)
-
- # add_padding_line says whether to rewrite
- #
- # | | | | | | | |
- # | o---+ into | o---+
- # | / / | | | # <--- padding line
- # o | | | / /
- # o | |
- add_padding_line = (len(text) > 2 and coldiff == -1 and
- [x for (x, y) in edges if x + 1 < y])
-
- # fix_nodeline_tail says whether to rewrite
- #
- # | | o | | | | o | |
- # | | |/ / | | |/ /
- # | o | | into | o / / # <--- fixed nodeline tail
- # | |/ / | |/ /
- # o | | o | |
- fix_nodeline_tail = len(text) <= 2 and not add_padding_line
-
- # nodeline is the line containing the node character (typically o)
- nodeline = ["|", " "] * idx
- nodeline.extend([char, " "])
-
- nodeline.extend(
- get_nodeline_edges_tail(idx, state[1], ncols, coldiff,
- state[0], fix_nodeline_tail))
-
- # shift_interline is the line containing the non-vertical
- # edges between this entry and the next
- shift_interline = ["|", " "] * idx
- if coldiff == -1:
- n_spaces = 1
- edge_ch = "/"
- elif coldiff == 0:
- n_spaces = 2
- edge_ch = "|"
- else:
- n_spaces = 3
- edge_ch = "\\"
- shift_interline.extend(n_spaces * [" "])
- shift_interline.extend([edge_ch, " "] * (ncols - idx - 1))
-
- # draw edges from the current node to its parents
- draw_edges(edges, nodeline, shift_interline)
-
- # lines is the list of all graph lines to print
- lines = [nodeline]
- if add_padding_line:
- lines.append(get_padding_line(idx, ncols, edges))
- lines.append(shift_interline)
-
- # make sure that there are as many graph lines as there are
- # log strings
- while len(text) < len(lines):
- text.append("")
- if len(lines) < len(text):
- extra_interline = ["|", " "] * (ncols + coldiff)
- while len(lines) < len(text):
- lines.append(extra_interline)
-
- # print lines
- indentation_level = max(ncols, ncols + coldiff)
- for (line, logstr) in zip(lines, text):
- ln = "%-*s %s" % (2 * indentation_level, "".join(line), logstr)
- buf.write(ln.rstrip() + '\n')
-
- # ... and start over
- state[0] = coldiff
- state[1] = idx
-
-def generate(dag, edgefn, current):
- seen, state = [], [0, 0]
- buf = Buffer()
- for node, parents in list(dag):
- if node.time:
- age_label = age(int(node.time))
- else:
- age_label = 'Original'
- line = '[%s] %s' % (node.n, age_label)
- if node.n == current:
- char = '@'
- else:
- char = 'o'
- ascii(buf, state, 'C', char, [line], edgefn(seen, node, parents))
- return buf.b
-
-# Mercurial age function
-
-agescales = [("year", 3600 * 24 * 365),
- ("month", 3600 * 24 * 30),
- ("week", 3600 * 24 * 7),
- ("day", 3600 * 24),
- ("hour", 3600),
- ("minute", 60),
- ("second", 1)]
-
-def age(ts):
- '''turn a timestamp into an age string.'''
-
- def plural(t, c):
- if c == 1:
- return t
- return t + "s"
- def fmt(t, c):
- return "%d %s" % (c, plural(t, c))
-
- now = time.time()
- then = ts
- if then > now:
- return 'in the future'
-
- delta = max(1, int(now - then))
- if delta > agescales[0][1] * 2:
- return time.strftime('%Y-%m-%d', time.gmtime(float(ts)))
-
- for t, s in agescales:
- n = delta // s
- if n >= 2 or s == 1:
- return '%s ago' % fmt(t, n)
-
-# Python Vim utility functions
-
-normal = lambda s: vim.command('normal %s' % s)
-
-MISSING_BUFFER = "Cannot find Gundo's target buffer (%s)"
-MISSING_WINDOW = "Cannot find window (%s) for Gundo's target buffer (%s)"
-
-def _check_sanity():
- '''Check to make sure we're not crazy.
-
- Does the following things:
-
- * Make sure the target buffer still exists.
- '''
- b = int(vim.eval('g:gundo_target_n'))
-
- if not vim.eval('bufloaded(%d)' % b):
- vim.command('echo "%s"' % (MISSING_BUFFER % b))
- return False
-
- w = int(vim.eval('bufwinnr(%d)' % b))
- if w == -1:
- vim.command('echo "%s"' % (MISSING_WINDOW % (w, b)))
- return False
-
- return True
-
-def _goto_window_for_buffer(b):
- w = int(vim.eval('bufwinnr(%d)' % int(b)))
- vim.command('%dwincmd w' % w)
-
-def _goto_window_for_buffer_name(bn):
- b = vim.eval('bufnr("%s")' % bn)
- return _goto_window_for_buffer(b)
-
-def _undo_to(n):
- n = int(n)
- if n == 0:
- vim.command('silent earlier %s' % (int(vim.eval('&undolevels')) + 1))
- else:
- vim.command('silent undo %d' % n)
-
-
-INLINE_HELP = '''\
-" Gundo for %s (%d)
-" j/k - move between undo states
-" p - preview diff of selected and current states
-" <cr> - revert to selected state
-
-'''
-
-# Python undo tree data structures and functions
-
-class Buffer(object):
- def __init__(self):
- self.b = ''
-
- def write(self, s):
- self.b += s
-
-class Node(object):
- def __init__(self, n, parent, time, curhead):
- self.n = int(n)
- self.parent = parent
- self.children = []
- self.curhead = curhead
- self.time = time
-
-def _make_nodes(alts, nodes, parent=None):
- p = parent
-
- for alt in alts:
- curhead = 'curhead' in alt
- node = Node(n=alt['seq'], parent=p, time=alt['time'], curhead=curhead)
- nodes.append(node)
- if alt.get('alt'):
- _make_nodes(alt['alt'], nodes, p)
- p = node
-
-def make_nodes():
- ut = vim.eval('undotree()')
- entries = ut['entries']
-
- root = Node(0, None, False, 0)
- nodes = []
- _make_nodes(entries, nodes, root)
- nodes.append(root)
- nmap = dict((node.n, node) for node in nodes)
- return nodes, nmap
-
-def changenr(nodes):
- _curhead_l = list(itertools.dropwhile(lambda n: not n.curhead, nodes))
- if _curhead_l:
- current = _curhead_l[0].parent.n
- else:
- current = int(vim.eval('changenr()'))
- return current
-
-# Gundo rendering
-
-# Rendering utility functions
-
-def _fmt_time(t):
- return time.strftime('%Y-%m-%d %I:%M:%S %p', time.localtime(float(t)))
-
-def _output_preview_text(lines):
- _goto_window_for_buffer_name('__Gundo_Preview__')
- vim.command('setlocal modifiable')
- vim.current.buffer[:] = lines
- vim.command('setlocal nomodifiable')
-
-def _generate_preview_diff(current, node_before, node_after):
- _goto_window_for_buffer(vim.eval('g:gundo_target_n'))
-
- if not node_after.n: # we're at the original file
- before_lines = []
-
- _undo_to(0)
- after_lines = vim.current.buffer[:]
-
- before_name = 'n/a'
- before_time = ''
- after_name = 'Original'
- after_time = ''
- elif not node_before.n: # we're at a pseudo-root state
- _undo_to(0)
- before_lines = vim.current.buffer[:]
-
- _undo_to(node_after.n)
- after_lines = vim.current.buffer[:]
-
- before_name = 'Original'
- before_time = ''
- after_name = node_after.n
- after_time = _fmt_time(node_after.time)
- else:
- _undo_to(node_before.n)
- before_lines = vim.current.buffer[:]
-
- _undo_to(node_after.n)
- after_lines = vim.current.buffer[:]
-
- before_name = node_before.n
- before_time = _fmt_time(node_before.time)
- after_name = node_after.n
- after_time = _fmt_time(node_after.time)
-
- _undo_to(current)
-
- return list(difflib.unified_diff(before_lines, after_lines,
- before_name, after_name,
- before_time, after_time))
-
-def _generate_change_preview_diff(current, node_before, node_after):
- _goto_window_for_buffer(vim.eval('g:gundo_target_n'))
-
- _undo_to(node_before.n)
- before_lines = vim.current.buffer[:]
-
- _undo_to(node_after.n)
- after_lines = vim.current.buffer[:]
-
- before_name = node_before.n or 'Original'
- before_time = node_before.time and _fmt_time(node_before.time) or ''
- after_name = node_after.n or 'Original'
- after_time = node_after.time and _fmt_time(node_after.time) or ''
-
- _undo_to(current)
-
- return list(difflib.unified_diff(before_lines, after_lines,
- before_name, after_name,
- before_time, after_time))
-
-def GundoRenderGraph():
- if not _check_sanity():
- return
-
- nodes, nmap = make_nodes()
-
- for node in nodes:
- node.children = [n for n in nodes if n.parent == node]
-
- def walk_nodes(nodes):
- for node in nodes:
- if node.parent:
- yield (node, [node.parent])
- else:
- yield (node, [])
-
- dag = sorted(nodes, key=lambda n: int(n.n), reverse=True)
- current = changenr(nodes)
-
- result = generate(walk_nodes(dag), asciiedges, current).rstrip().splitlines()
- result = [' ' + l for l in result]
-
- target = (vim.eval('g:gundo_target_f'), int(vim.eval('g:gundo_target_n')))
-
- if int(vim.eval('g:gundo_help')):
- header = (INLINE_HELP % target).splitlines()
- else:
- header = []
-
- vim.command('call s:GundoOpenGraph()')
- vim.command('setlocal modifiable')
- vim.current.buffer[:] = (header + result)
- vim.command('setlocal nomodifiable')
-
- i = 1
- for line in result:
- try:
- line.split('[')[0].index('@')
- i += 1
- break
- except ValueError:
- pass
- i += 1
- vim.command('%d' % (i+len(header)-1))
-
-def GundoRenderPreview():
- if not _check_sanity():
- return
-
- target_state = vim.eval('s:GundoGetTargetState()')
-
- # Check that there's an undo state. There may not be if we're talking about
- # a buffer with no changes yet.
- if target_state == None:
- _goto_window_for_buffer_name('__Gundo__')
- return
- else:
- target_state = int(target_state)
-
- _goto_window_for_buffer(vim.eval('g:gundo_target_n'))
-
- nodes, nmap = make_nodes()
- current = changenr(nodes)
-
- node_after = nmap[target_state]
- node_before = node_after.parent
-
- vim.command('call s:GundoOpenPreview()')
- _output_preview_text(_generate_preview_diff(current, node_before, node_after))
-
- _goto_window_for_buffer_name('__Gundo__')
-
-def GundoRenderChangePreview():
- if not _check_sanity():
- return
-
- target_state = vim.eval('s:GundoGetTargetState()')
-
- # Check that there's an undo state. There may not be if we're talking about
- # a buffer with no changes yet.
- if target_state == None:
- _goto_window_for_buffer_name('__Gundo__')
- return
- else:
- target_state = int(target_state)
-
- _goto_window_for_buffer(vim.eval('g:gundo_target_n'))
-
- nodes, nmap = make_nodes()
- current = changenr(nodes)
-
- node_after = nmap[target_state]
- node_before = nmap[current]
-
- vim.command('call s:GundoOpenPreview()')
- _output_preview_text(_generate_change_preview_diff(current, node_before, node_after))
-
- _goto_window_for_buffer_name('__Gundo__')
-
-# Gundo undo/redo
-
-def GundoRevert():
- if not _check_sanity():
- return
-
- target_n = int(vim.eval('s:GundoGetTargetState()'))
- back = vim.eval('g:gundo_target_n')
-
- _goto_window_for_buffer(back)
- _undo_to(target_n)
-
- vim.command('GundoRenderGraph')
- _goto_window_for_buffer(back)
-
- if int(vim.eval('g:gundo_close_on_revert')):
- vim.command('GundoToggle')
-
-def GundoPlayTo():
- if not _check_sanity():
- return
-
- target_n = int(vim.eval('s:GundoGetTargetState()'))
- back = int(vim.eval('g:gundo_target_n'))
-
- vim.command('echo "%s"' % back)
-
- _goto_window_for_buffer(back)
- normal('zR')
-
- nodes, nmap = make_nodes()
-
- start = nmap[changenr(nodes)]
- end = nmap[target_n]
-
- def _walk_branch(origin, dest):
- rev = origin.n < dest.n
-
- nodes = []
- if origin.n > dest.n:
- current, final = origin, dest
- else:
- current, final = dest, origin
-
- while current.n >= final.n:
- if current.n == final.n:
- break
- nodes.append(current)
- current = current.parent
- else:
- return None
- nodes.append(current)
-
- return reversed(nodes) if rev else nodes
-
- branch = _walk_branch(start, end)
-
- if not branch:
- vim.command('unsilent echo "No path to that node from here!"')
- return
-
- for node in branch:
- _undo_to(node.n)
- vim.command('GundoRenderGraph')
- normal('zz')
- _goto_window_for_buffer(back)
- vim.command('redraw')
- vim.command('sleep 60m')
-
-def initPythonModule():
- if sys.version_info[:2] < (2, 4):
- vim.command('let s:has_supported_python = 0')