# stuff related specifically to patch manipulation / parsing # # Copyright 2008 Mark Edgington # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. # # This code is based on the Mark Edgington's crecord extension. # (Itself based on Bryan O'Sullivan's record extension.) from __future__ import absolute_import import locale import os import re import signal import struct import sys from .i18n import _ from . import ( encoding, error, patch as patchmod, util, ) stringio = util.stringio # This is required for ncurses to display non-ASCII characters in default user # locale encoding correctly. --immerrr locale.setlocale(locale.LC_ALL, '') # patch comments based on the git one diffhelptext = _("""# To remove '-' lines, make them ' ' lines (context). # To remove '+' lines, delete them. # Lines starting with # will be removed from the patch. """) hunkhelptext = _("""# # If the patch applies cleanly, the edited hunk will immediately be # added to the record list. If it does not apply cleanly, a rejects file # will be generated. You can use that when you try again. If all lines # of the hunk are removed, then the edit is aborted and the hunk is left # unchanged. """) patchhelptext = _("""# # If the patch applies cleanly, the edited patch will immediately # be finalised. If it does not apply cleanly, rejects files will be # generated. You can use those when you try again. """) try: import curses import fcntl import termios curses.error fcntl.ioctl termios.TIOCGWINSZ except ImportError: # I have no idea if wcurses works with crecord... try: import wcurses as curses curses.error except ImportError: # wcurses is not shipped on Windows by default, or python is not # compiled with curses curses = False def checkcurses(ui): """Return True if the user wants to use curses This method returns True if curses is found (and that python is built with it) and that the user has the correct flag for the ui. """ return curses and ui.interface("chunkselector") == "curses" _origstdout = sys.__stdout__ # used by gethw() class patchnode(object): """abstract class for patch graph nodes (i.e. patchroot, header, hunk, hunkline) """ def firstchild(self): raise NotImplementedError("method must be implemented by subclass") def lastchild(self): raise NotImplementedError("method must be implemented by subclass") def allchildren(self): "Return a list of all of the direct children of this node" raise NotImplementedError("method must be implemented by subclass") def nextsibling(self): """ Return the closest next item of the same type where there are no items of different types between the current item and this closest item. If no such item exists, return None. """ raise NotImplementedError("method must be implemented by subclass") def prevsibling(self): """ Return the closest previous item of the same type where there are no items of different types between the current item and this closest item. If no such item exists, return None. """ raise NotImplementedError("method must be implemented by subclass") def parentitem(self): raise NotImplementedError("method must be implemented by subclass") def nextitem(self, constrainlevel=True, skipfolded=True): """ If constrainLevel == True, return the closest next item of the same type where there are no items of different types between the current item and this closest item. If constrainLevel == False, then try to return the next item closest to this item, regardless of item's type (header, hunk, or HunkLine). If skipFolded == True, and the current item is folded, then the child items that are hidden due to folding will be skipped when determining the next item. If it is not possible to get the next item, return None. """ try: itemfolded = self.folded except AttributeError: itemfolded = False if constrainlevel: return self.nextsibling() elif skipfolded and itemfolded: nextitem = self.nextsibling() if nextitem is None: try: nextitem = self.parentitem().nextsibling() except AttributeError: nextitem = None return nextitem else: # try child item = self.firstchild() if item is not None: return item # else try next sibling item = self.nextsibling() if item is not None: return item try: # else try parent's next sibling item = self.parentitem().nextsibling() if item is not None: return item # else return grandparent's next sibling (or None) return self.parentitem().parentitem().nextsibling() except AttributeError: # parent and/or grandparent was None return None def previtem(self, constrainlevel=True): """ If constrainLevel == True, return the closest previous item of the same type where there are no items of different types between the current item and this closest item. If constrainLevel == False, then try to return the previous item closest to this item, regardless of item's type (header, hunk, or HunkLine). If it is not possible to get the previous item, return None. """ if constrainlevel: return self.prevsibling() else: # try previous sibling's last child's last child, # else try previous sibling's last child, else try previous sibling prevsibling = self.prevsibling() if prevsibling is not None: prevsiblinglastchild = prevsibling.lastchild() if ((prevsiblinglastchild is not None) and not prevsibling.folded): prevsiblinglclc = prevsiblinglastchild.lastchild() if ((prevsiblinglclc is not None) and not prevsiblinglastchild.folded): return prevsiblinglclc else: return prevsiblinglastchild else: return prevsibling # try parent (or None) return self.parentitem() class patch(patchnode, list): # todo: rename patchroot """ list of header objects representing the patch. """ def __init__(self, headerlist): self.extend(headerlist) # add parent patch object reference to each header for header in self: header.patch = self class uiheader(patchnode): """patch header xxx shouldn't we move this to mercurial/patch.py ? """ def __init__(self, header): self.nonuiheader = header # flag to indicate whether to apply this chunk self.applied = True # flag which only affects the status display indicating if a node's # children are partially applied (i.e. some applied, some not). self.partial = False # flag to indicate whether to display as folded/unfolded to user self.folded = True # list of all headers in patch self.patch = None # flag is False if this header was ever unfolded from initial state self.neverunfolded = True self.hunks = [uihunk(h, self) for h in self.hunks] def prettystr(self): x = stringio() self.pretty(x) return x.getvalue() def nextsibling(self): numheadersinpatch = len(self.patch) indexofthisheader = self.patch.index(self) if indexofthisheader < numheadersinpatch - 1: nextheader = self.patch[indexofthisheader + 1] return nextheader else: return None def prevsibling(self): indexofthisheader = self.patch.index(self) if indexofthisheader > 0: previousheader = self.patch[indexofthisheader - 1] return previousheader else: return None def parentitem(self): """ there is no 'real' parent item of a header that can be selected, so return None. """ return None def firstchild(self): "return the first child of this item, if one exists. otherwise None." if len(self.hunks) > 0: return self.hunks[0] else: return None def lastchild(self): "return the last child of this item, if one exists. otherwise None." if len(self.hunks) > 0: return self.hunks[-1] else: return None def allchildren(self): "return a list of all of the direct children of this node" return self.hunks def __getattr__(self, name): return getattr(self.nonuiheader, name) class uihunkline(patchnode): "represents a changed line in a hunk" def __init__(self, linetext, hunk): self.linetext = linetext self.applied = True # the parent hunk to which this line belongs self.hunk = hunk # folding lines currently is not used/needed, but this flag is needed # in the previtem method. self.folded = False def prettystr(self): return self.linetext def nextsibling(self): numlinesinhunk = len(self.hunk.changedlines) indexofthisline = self.hunk.changedlines.index(self) if (indexofthisline < numlinesinhunk - 1): nextline = self.hunk.changedlines[indexofthisline + 1] return nextline else: return None def prevsibling(self): indexofthisline = self.hunk.changedlines.index(self) if indexofthisline > 0: previousline = self.hunk.changedlines[indexofthisline - 1] return previousline else: return None def parentitem(self): "return the parent to the current item" return self.hunk def firstchild(self): "return the first child of this item, if one exists. otherwise None." # hunk-lines don't have children return None def lastchild(self): "return the last child of this item, if one exists. otherwise None." # hunk-lines don't have children return None class uihunk(patchnode): """ui patch hunk, wraps a hunk and keep track of ui behavior """ maxcontext = 3 def __init__(self, hunk, header): self._hunk = hunk self.changedlines = [uihunkline(line, self) for line in hunk.hunk] self.header = header # used at end for detecting how many removed lines were un-applied self.originalremoved = self.removed # flag to indicate whether to display as folded/unfolded to user self.folded = True # flag to indicate whether to apply this chunk self.applied = True # flag which only affects the status display indicating if a node's # children are partially applied (i.e. some applied, some not). self.partial = False def nextsibling(self): numhunksinheader = len(self.header.hunks) indexofthishunk = self.header.hunks.index(self) if (indexofthishunk < numhunksinheader - 1): nexthunk = self.header.hunks[indexofthishunk + 1] return nexthunk else: return None def prevsibling(self): indexofthishunk = self.header.hunks.index(self) if indexofthishunk > 0: previoushunk = self.header.hunks[indexofthishunk - 1] return previoushunk else: return None def parentitem(self): "return the parent to the current item" return self.header def firstchild(self): "return the first child of this item, if one exists. otherwise None." if len(self.changedlines) > 0: return self.changedlines[0] else: return None def lastchild(self): "return the last child of this item, if one exists. otherwise None." if len(self.changedlines) > 0: return self.changedlines[-1] else: return None def allchildren(self): "return a list of all of the direct children of this node" return self.changedlines def countchanges(self): """changedlines -> (n+,n-)""" add = len([l for l in self.changedlines if l.applied and l.prettystr()[0] == '+']) rem = len([l for l in self.changedlines if l.applied and l.prettystr()[0] == '-']) return add, rem def getfromtoline(self): # calculate the number of removed lines converted to context lines removedconvertedtocontext = self.originalremoved - self.removed contextlen = (len(self.before) + len(self.after) + removedconvertedtocontext) if self.after and self.after[-1] == '\\ no newline at end of file\n': contextlen -= 1 fromlen = contextlen + self.removed tolen = contextlen + self.added # diffutils manual, section "2.2.2.2 detailed description of unified # format": "an empty hunk is considered to end at the line that # precedes the hunk." # # so, if either of hunks is empty, decrease its line start. --immerrr # but only do this if fromline > 0, to avoid having, e.g fromline=-1. fromline, toline = self.fromline, self.toline if fromline != 0: if fromlen == 0: fromline -= 1 if tolen == 0: toline -= 1 fromtoline = '@@ -%d,%d +%d,%d @@%s\n' % ( fromline, fromlen, toline, tolen, self.proc and (' ' + self.proc)) return fromtoline def write(self, fp): # updated self.added/removed, which are used by getfromtoline() self.added, self.removed = self.countchanges() fp.write(self.getfromtoline()) hunklinelist = [] # add the following to the list: (1) all applied lines, and # (2) all unapplied removal lines (convert these to context lines) for changedline in self.changedlines: changedlinestr = changedline.prettystr() if changedline.applied: hunklinelist.append(changedlinestr) elif changedlinestr[0] == "-": hunklinelist.append(" " + changedlinestr[1:]) fp.write(''.join(self.before + hunklinelist + self.after)) pretty = write def prettystr(self): x = stringio() self.pretty(x) return x.getvalue() def __getattr__(self, name): return getattr(self._hunk, name) def __repr__(self): return '' % (self.filename(), self.fromline) def filterpatch(ui, chunks, chunkselector, operation=None): """interactively filter patch chunks into applied-only chunks""" if operation is None: operation = _('confirm') chunks = list(chunks) # convert chunks list into structure suitable for displaying/modifying # with curses. create a list of headers only. headers = [c for c in chunks if isinstance(c, patchmod.header)] # if there are no changed files if len(headers) == 0: return [], {} uiheaders = [uiheader(h) for h in headers] # let user choose headers/hunks/lines, and mark their applied flags # accordingly ret = chunkselector(ui, uiheaders) appliedhunklist = [] for hdr in uiheaders: if (hdr.applied and (hdr.special() or len([h for h in hdr.hunks if h.applied]) > 0)): appliedhunklist.append(hdr) fixoffset = 0 for hnk in hdr.hunks: if hnk.applied: appliedhunklist.append(hnk) # adjust the 'to'-line offset of the hunk to be correct # after de-activating some of the other hunks for this file if fixoffset: #hnk = copy.copy(hnk) # necessary?? hnk.toline += fixoffset else: fixoffset += hnk.removed - hnk.added return (appliedhunklist, ret) def gethw(): """ magically get the current height and width of the window (without initscr) this is a rip-off of a rip-off - taken from the bpython code. it is useful / necessary because otherwise curses.initscr() must be called, which can leave the terminal in a nasty state after exiting. """ h, w = struct.unpack( "hhhh", fcntl.ioctl(_origstdout, termios.TIOCGWINSZ, "\000"*8))[0:2] return h, w def chunkselector(ui, headerlist): """ curses interface to get selection of chunks, and mark the applied flags of the chosen chunks. """ ui.write(_('starting interactive selection\n')) chunkselector = curseschunkselector(headerlist, ui) f = signal.getsignal(signal.SIGTSTP) curses.wrapper(chunkselector.main) if chunkselector.initerr is not None: raise error.Abort(chunkselector.initerr) # ncurses does not restore signal handler for SIGTSTP signal.signal(signal.SIGTSTP, f) return chunkselector.opts def testdecorator(testfn, f): def u(*args, **kwargs): return f(testfn, *args, **kwargs) return u def testchunkselector(testfn, ui, headerlist): """ test interface to get selection of chunks, and mark the applied flags of the chosen chunks. """ chunkselector = curseschunkselector(headerlist, ui) if testfn and os.path.exists(testfn): testf = open(testfn) testcommands = map(lambda x: x.rstrip('\n'), testf.readlines()) testf.close() while True: if chunkselector.handlekeypressed(testcommands.pop(0), test=True): break return chunkselector.opts class curseschunkselector(object): def __init__(self, headerlist, ui): # put the headers into a patch object self.headerlist = patch(headerlist) self.ui = ui self.opts = {} self.errorstr = None # list of all chunks self.chunklist = [] for h in headerlist: self.chunklist.append(h) self.chunklist.extend(h.hunks) # dictionary mapping (fgcolor, bgcolor) pairs to the # corresponding curses color-pair value. self.colorpairs = {} # maps custom nicknames of color-pairs to curses color-pair values self.colorpairnames = {} # the currently selected header, hunk, or hunk-line self.currentselecteditem = self.headerlist[0] # updated when printing out patch-display -- the 'lines' here are the # line positions *in the pad*, not on the screen. self.selecteditemstartline = 0 self.selecteditemendline = None # define indentation levels self.headerindentnumchars = 0 self.hunkindentnumchars = 3 self.hunklineindentnumchars = 6 # the first line of the pad to print to the screen self.firstlineofpadtoprint = 0 # keeps track of the number of lines in the pad self.numpadlines = None self.numstatuslines = 2 # keep a running count of the number of lines printed to the pad # (used for determining when the selected item begins/ends) self.linesprintedtopadsofar = 0 # the first line of the pad which is visible on the screen self.firstlineofpadtoprint = 0 # stores optional text for a commit comment provided by the user self.commenttext = "" # if the last 'toggle all' command caused all changes to be applied self.waslasttoggleallapplied = True def uparrowevent(self): """ try to select the previous item to the current item that has the most-indented level. for example, if a hunk is selected, try to select the last hunkline of the hunk prior to the selected hunk. or, if the first hunkline of a hunk is currently selected, then select the hunk itself. """ currentitem = self.currentselecteditem nextitem = currentitem.previtem(constrainlevel=False) if nextitem is None: # if no parent item (i.e. currentitem is the first header), then # no change... nextitem = currentitem self.currentselecteditem = nextitem def uparrowshiftevent(self): """ select (if possible) the previous item on the same level as the currently selected item. otherwise, select (if possible) the parent-item of the currently selected item. """ currentitem = self.currentselecteditem nextitem = currentitem.previtem() # if there's no previous item on this level, try choosing the parent if nextitem is None: nextitem = currentitem.parentitem() if nextitem is None: # if no parent item (i.e. currentitem is the first header), then # no change... nextitem = currentitem self.currentselecteditem = nextitem def downarrowevent(self): """ try to select the next item to the current item that has the most-indented level. for example, if a hunk is selected, select the first hunkline of the selected hunk. or, if the last hunkline of a hunk is currently selected, then select the next hunk, if one exists, or if not, the next header if one exists. """ #self.startprintline += 1 #debug currentitem = self.currentselecteditem nextitem = currentitem.nextitem(constrainlevel=False) # if there's no next item, keep the selection as-is if nextitem is None: nextitem = currentitem self.currentselecteditem = nextitem def downarrowshiftevent(self): """ select (if possible) the next item on the same level as the currently selected item. otherwise, select (if possible) the next item on the same level as the parent item of the currently selected item. """ currentitem = self.currentselecteditem nextitem = currentitem.nextitem() # if there's no next item on this level, try choosing the parent's # nextitem. if nextitem is None: try: nextitem = currentitem.parentitem().nextitem() except AttributeError: # parentitem returned None, so nextitem() can't be called nextitem = None if nextitem is None: # if no next item on parent-level, then no change... nextitem = currentitem self.currentselecteditem = nextitem def rightarrowevent(self): """ select (if possible) the first of this item's child-items. """ currentitem = self.currentselecteditem nextitem = currentitem.firstchild() # turn off folding if we want to show a child-item if currentitem.folded: self.togglefolded(currentitem) if nextitem is None: # if no next item on parent-level, then no change... nextitem = currentitem self.currentselecteditem = nextitem def leftarrowevent(self): """ if the current item can be folded (i.e. it is an unfolded header or hunk), then fold it. otherwise try select (if possible) the parent of this item. """ currentitem = self.currentselecteditem # try to fold the item if not isinstance(currentitem, uihunkline): if not currentitem.folded: self.togglefolded(item=currentitem) return # if it can't be folded, try to select the parent item nextitem = currentitem.parentitem() if nextitem is None: # if no item on parent-level, then no change... nextitem = currentitem if not nextitem.folded: self.togglefolded(item=nextitem) self.currentselecteditem = nextitem def leftarrowshiftevent(self): """ select the header of the current item (or fold current item if the current item is already a header). """ currentitem = self.currentselecteditem if isinstance(currentitem, uiheader): if not currentitem.folded: self.togglefolded(item=currentitem) return # select the parent item recursively until we're at a header while True: nextitem = currentitem.parentitem() if nextitem is None: break else: currentitem = nextitem self.currentselecteditem = currentitem def updatescroll(self): "scroll the screen to fully show the currently-selected" selstart = self.selecteditemstartline selend = self.selecteditemendline #selnumlines = selend - selstart padstart = self.firstlineofpadtoprint padend = padstart + self.yscreensize - self.numstatuslines - 1 # 'buffered' pad start/end values which scroll with a certain # top/bottom context margin padstartbuffered = padstart + 3 padendbuffered = padend - 3 if selend > padendbuffered: self.scrolllines(selend - padendbuffered) elif selstart < padstartbuffered: # negative values scroll in pgup direction self.scrolllines(selstart - padstartbuffered) def scrolllines(self, numlines): "scroll the screen up (down) by numlines when numlines >0 (<0)." self.firstlineofpadtoprint += numlines if self.firstlineofpadtoprint < 0: self.firstlineofpadtoprint = 0 if self.firstlineofpadtoprint > self.numpadlines - 1: self.firstlineofpadtoprint = self.numpadlines - 1 def toggleapply(self, item=None): """ toggle the applied flag of the specified item. if no item is specified, toggle the flag of the currently selected item. """ if item is None: item = self.currentselecteditem item.applied = not item.applied if isinstance(item, uiheader): item.partial = False if item.applied: # apply all its hunks for hnk in item.hunks: hnk.applied = True # apply all their hunklines for hunkline in hnk.changedlines: hunkline.applied = True else: # un-apply all its hunks for hnk in item.hunks: hnk.applied = False hnk.partial = False # un-apply all their hunklines for hunkline in hnk.changedlines: hunkline.applied = False elif isinstance(item, uihunk): item.partial = False # apply all it's hunklines for hunkline in item.changedlines: hunkline.applied = item.applied siblingappliedstatus = [hnk.applied for hnk in item.header.hunks] allsiblingsapplied = not (False in siblingappliedstatus) nosiblingsapplied = not (True in siblingappliedstatus) siblingspartialstatus = [hnk.partial for hnk in item.header.hunks] somesiblingspartial = (True in siblingspartialstatus) #cases where applied or partial should be removed from header # if no 'sibling' hunks are applied (including this hunk) if nosiblingsapplied: if not item.header.special(): item.header.applied = False item.header.partial = False else: # some/all parent siblings are applied item.header.applied = True item.header.partial = (somesiblingspartial or not allsiblingsapplied) elif isinstance(item, uihunkline): siblingappliedstatus = [ln.applied for ln in item.hunk.changedlines] allsiblingsapplied = not (False in siblingappliedstatus) nosiblingsapplied = not (True in siblingappliedstatus) # if no 'sibling' lines are applied if nosiblingsapplied: item.hunk.applied = False item.hunk.partial = False elif allsiblingsapplied: item.hunk.applied = True item.hunk.partial = False else: # some siblings applied item.hunk.applied = True item.hunk.partial = True parentsiblingsapplied = [hnk.applied for hnk in item.hunk.header.hunks] noparentsiblingsapplied = not (True in parentsiblingsapplied) allparentsiblingsapplied = not (False in parentsiblingsapplied) parentsiblingspartial = [hnk.partial for hnk in item.hunk.header.hunks] someparentsiblingspartial = (True in parentsiblingspartial) # if all parent hunks are not applied, un-apply header if noparentsiblingsapplied: if not item.hunk.header.special(): item.hunk.header.applied = False item.hunk.header.partial = False # set the applied and partial status of the header if needed else: # some/all parent siblings are applied item.hunk.header.applied = True item.hunk.header.partial = (someparentsiblingspartial or not allparentsiblingsapplied) def toggleall(self): "toggle the applied flag of all items." if self.waslasttoggleallapplied: # then unapply them this time for item in self.headerlist: if item.applied: self.toggleapply(item) else: for item in self.headerlist: if not item.applied: self.toggleapply(item) self.waslasttoggleallapplied = not self.waslasttoggleallapplied def togglefolded(self, item=None, foldparent=False): "toggle folded flag of specified item (defaults to currently selected)" if item is None: item = self.currentselecteditem if foldparent or (isinstance(item, uiheader) and item.neverunfolded): if not isinstance(item, uiheader): # we need to select the parent item in this case self.currentselecteditem = item = item.parentitem() elif item.neverunfolded: item.neverunfolded = False # also fold any foldable children of the parent/current item if isinstance(item, uiheader): # the original or 'new' item for child in item.allchildren(): child.folded = not item.folded if isinstance(item, (uiheader, uihunk)): item.folded = not item.folded def alignstring(self, instr, window): """ add whitespace to the end of a string in order to make it fill the screen in the x direction. the current cursor position is taken into account when making this calculation. the string can span multiple lines. """ y, xstart = window.getyx() width = self.xscreensize # turn tabs into spaces instr = instr.expandtabs(4) strwidth = encoding.colwidth(instr) numspaces = (width - ((strwidth + xstart) % width) - 1) return instr + " " * numspaces + "\n" def printstring(self, window, text, fgcolor=None, bgcolor=None, pair=None, pairname=None, attrlist=None, towin=True, align=True, showwhtspc=False): """ print the string, text, with the specified colors and attributes, to the specified curses window object. the foreground and background colors are of the form curses.color_xxxx, where xxxx is one of: [black, blue, cyan, green, magenta, red, white, yellow]. if pairname is provided, a color pair will be looked up in the self.colorpairnames dictionary. attrlist is a list containing text attributes in the form of curses.a_xxxx, where xxxx can be: [bold, dim, normal, standout, underline]. if align == True, whitespace is added to the printed string such that the string stretches to the right border of the window. if showwhtspc == True, trailing whitespace of a string is highlighted. """ # preprocess the text, converting tabs to spaces text = text.expandtabs(4) # strip \n, and convert control characters to ^[char] representation text = re.sub(r'[\x00-\x08\x0a-\x1f]', lambda m:'^' + chr(ord(m.group()) + 64), text.strip('\n')) if pair is not None: colorpair = pair elif pairname is not None: colorpair = self.colorpairnames[pairname] else: if fgcolor is None: fgcolor = -1 if bgcolor is None: bgcolor = -1 if (fgcolor, bgcolor) in self.colorpairs: colorpair = self.colorpairs[(fgcolor, bgcolor)] else: colorpair = self.getcolorpair(fgcolor, bgcolor) # add attributes if possible if attrlist is None: attrlist = [] if colorpair < 256: # then it is safe to apply all attributes for textattr in attrlist: colorpair |= textattr else: # just apply a select few (safe?) attributes for textattr in (curses.A_UNDERLINE, curses.A_BOLD): if textattr in attrlist: colorpair |= textattr y, xstart = self.chunkpad.getyx() t = "" # variable for counting lines printed # if requested, show trailing whitespace if showwhtspc: origlen = len(text) text = text.rstrip(' \n') # tabs have already been expanded strippedlen = len(text) numtrailingspaces = origlen - strippedlen if towin: window.addstr(text, colorpair) t += text if showwhtspc: wscolorpair = colorpair | curses.A_REVERSE if towin: for i in range(numtrailingspaces): window.addch(curses.ACS_CKBOARD, wscolorpair) t += " " * numtrailingspaces if align: if towin: extrawhitespace = self.alignstring("", window) window.addstr(extrawhitespace, colorpair) else: # need to use t, since the x position hasn't incremented extrawhitespace = self.alignstring(t, window) t += extrawhitespace # is reset to 0 at the beginning of printitem() linesprinted = (xstart + len(t)) / self.xscreensize self.linesprintedtopadsofar += linesprinted return t def updatescreen(self): self.statuswin.erase() self.chunkpad.erase() printstring = self.printstring # print out the status lines at the top try: if self.errorstr is not None: printstring(self.statuswin, self.errorstr, pairname='legend') printstring(self.statuswin, 'Press any key to continue', pairname='legend') self.statuswin.refresh() return line1 = ("SELECT CHUNKS: (j/k/up/dn/pgup/pgdn) move cursor; " "(space/A) toggle hunk/all; (e)dit hunk;") line2 = (" (f)old/unfold; (c)onfirm applied; (q)uit; (?) help " "| [X]=hunk applied **=folded, toggle [a]mend mode") printstring(self.statuswin, util.ellipsis(line1, self.xscreensize - 1), pairname="legend") printstring(self.statuswin, util.ellipsis(line2, self.xscreensize - 1), pairname="legend") except curses.error: pass # print out the patch in the remaining part of the window try: self.printitem() self.updatescroll() self.chunkpad.refresh(self.firstlineofpadtoprint, 0, self.numstatuslines, 0, self.yscreensize + 1 - self.numstatuslines, self.xscreensize) except curses.error: pass # refresh([pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol]) self.statuswin.refresh() def getstatusprefixstring(self, item): """ create a string to prefix a line with which indicates whether 'item' is applied and/or folded. """ # create checkbox string if item.applied: if not isinstance(item, uihunkline) and item.partial: checkbox = "[~]" else: checkbox = "[x]" else: checkbox = "[ ]" try: if item.folded: checkbox += "**" if isinstance(item, uiheader): # one of "m", "a", or "d" (modified, added, deleted) filestatus = item.changetype checkbox += filestatus + " " else: checkbox += " " if isinstance(item, uiheader): # add two more spaces for headers checkbox += " " except AttributeError: # not foldable checkbox += " " return checkbox def printheader(self, header, selected=False, towin=True, ignorefolding=False): """ print the header to the pad. if countlines is True, don't print anything, but just count the number of lines which would be printed. """ outstr = "" text = header.prettystr() chunkindex = self.chunklist.index(header) if chunkindex != 0 and not header.folded: # add separating line before headers outstr += self.printstring(self.chunkpad, '_' * self.xscreensize, towin=towin, align=False) # select color-pair based on if the header is selected colorpair = self.getcolorpair(name=selected and "selected" or "normal", attrlist=[curses.A_BOLD]) # print out each line of the chunk, expanding it to screen width # number of characters to indent lines on this level by indentnumchars = 0 checkbox = self.getstatusprefixstring(header) if not header.folded or ignorefolding: textlist = text.split("\n") linestr = checkbox + textlist[0] else: linestr = checkbox + header.filename() outstr += self.printstring(self.chunkpad, linestr, pair=colorpair, towin=towin) if not header.folded or ignorefolding: if len(textlist) > 1: for line in textlist[1:]: linestr = " "*(indentnumchars + len(checkbox)) + line outstr += self.printstring(self.chunkpad, linestr, pair=colorpair, towin=towin) return outstr def printhunklinesbefore(self, hunk, selected=False, towin=True, ignorefolding=False): "includes start/end line indicator" outstr = "" # where hunk is in list of siblings hunkindex = hunk.header.hunks.index(hunk) if hunkindex != 0: # add separating line before headers outstr += self.printstring(self.chunkpad, ' '*self.xscreensize, towin=towin, align=False) colorpair = self.getcolorpair(name=selected and "selected" or "normal", attrlist=[curses.A_BOLD]) # print out from-to line with checkbox checkbox = self.getstatusprefixstring(hunk) lineprefix = " "*self.hunkindentnumchars + checkbox frtoline = " " + hunk.getfromtoline().strip("\n") outstr += self.printstring(self.chunkpad, lineprefix, towin=towin, align=False) # add uncolored checkbox/indent outstr += self.printstring(self.chunkpad, frtoline, pair=colorpair, towin=towin) if hunk.folded and not ignorefolding: # skip remainder of output return outstr # print out lines of the chunk preceeding changed-lines for line in hunk.before: linestr = " "*(self.hunklineindentnumchars + len(checkbox)) + line outstr += self.printstring(self.chunkpad, linestr, towin=towin) return outstr def printhunklinesafter(self, hunk, towin=True, ignorefolding=False): outstr = "" if hunk.folded and not ignorefolding: return outstr # a bit superfluous, but to avoid hard-coding indent amount checkbox = self.getstatusprefixstring(hunk) for line in hunk.after: linestr = " "*(self.hunklineindentnumchars + len(checkbox)) + line outstr += self.printstring(self.chunkpad, linestr, towin=towin) return outstr def printhunkchangedline(self, hunkline, selected=False, towin=True): outstr = "" checkbox = self.getstatusprefixstring(hunkline) linestr = hunkline.prettystr().strip("\n") # select color-pair based on whether line is an addition/removal if selected: colorpair = self.getcolorpair(name="selected") elif linestr.startswith("+"): colorpair = self.getcolorpair(name="addition") elif linestr.startswith("-"): colorpair = self.getcolorpair(name="deletion") elif linestr.startswith("\\"): colorpair = self.getcolorpair(name="normal") lineprefix = " "*self.hunklineindentnumchars + checkbox outstr += self.printstring(self.chunkpad, lineprefix, towin=towin, align=False) # add uncolored checkbox/indent outstr += self.printstring(self.chunkpad, linestr, pair=colorpair, towin=towin, showwhtspc=True) return outstr def printitem(self, item=None, ignorefolding=False, recursechildren=True, towin=True): """ use __printitem() to print the the specified item.applied. if item is not specified, then print the entire patch. (hiding folded elements, etc. -- see __printitem() docstring) """ if item is None: item = self.headerlist if recursechildren: self.linesprintedtopadsofar = 0 outstr = [] self.__printitem(item, ignorefolding, recursechildren, outstr, towin=towin) return ''.join(outstr) def outofdisplayedarea(self): y, _ = self.chunkpad.getyx() # cursor location # * 2 here works but an optimization would be the max number of # consecutive non selectable lines # i.e the max number of context line for any hunk in the patch miny = min(0, self.firstlineofpadtoprint - self.yscreensize) maxy = self.firstlineofpadtoprint + self.yscreensize * 2 return y < miny or y > maxy def handleselection(self, item, recursechildren): selected = (item is self.currentselecteditem) if selected and recursechildren: # assumes line numbering starting from line 0 self.selecteditemstartline = self.linesprintedtopadsofar selecteditemlines = self.getnumlinesdisplayed(item, recursechildren=False) self.selecteditemendline = (self.selecteditemstartline + selecteditemlines - 1) return selected def __printitem(self, item, ignorefolding, recursechildren, outstr, towin=True): """ recursive method for printing out patch/header/hunk/hunk-line data to screen. also returns a string with all of the content of the displayed patch (not including coloring, etc.). if ignorefolding is True, then folded items are printed out. if recursechildren is False, then only print the item without its child items. """ if towin and self.outofdisplayedarea(): return selected = self.handleselection(item, recursechildren) # patch object is a list of headers if isinstance(item, patch): if recursechildren: for hdr in item: self.__printitem(hdr, ignorefolding, recursechildren, outstr, towin) # todo: eliminate all isinstance() calls if isinstance(item, uiheader): outstr.append(self.printheader(item, selected, towin=towin, ignorefolding=ignorefolding)) if recursechildren: for hnk in item.hunks: self.__printitem(hnk, ignorefolding, recursechildren, outstr, towin) elif (isinstance(item, uihunk) and ((not item.header.folded) or ignorefolding)): # print the hunk data which comes before the changed-lines outstr.append(self.printhunklinesbefore(item, selected, towin=towin, ignorefolding=ignorefolding)) if recursechildren: for l in item.changedlines: self.__printitem(l, ignorefolding, recursechildren, outstr, towin) outstr.append(self.printhunklinesafter(item, towin=towin, ignorefolding=ignorefolding)) elif (isinstance(item, uihunkline) and ((not item.hunk.folded) or ignorefolding)): outstr.append(self.printhunkchangedline(item, selected, towin=towin)) return outstr def getnumlinesdisplayed(self, item=None, ignorefolding=False, recursechildren=True): """ return the number of lines which would be displayed if the item were to be printed to the display. the item will not be printed to the display (pad). if no item is given, assume the entire patch. if ignorefolding is True, folded items will be unfolded when counting the number of lines. """ # temporarily disable printing to windows by printstring patchdisplaystring = self.printitem(item, ignorefolding, recursechildren, towin=False) numlines = len(patchdisplaystring) / self.xscreensize return numlines def sigwinchhandler(self, n, frame): "handle window resizing" try: curses.endwin() self.yscreensize, self.xscreensize = gethw() self.statuswin.resize(self.numstatuslines, self.xscreensize) self.numpadlines = self.getnumlinesdisplayed(ignorefolding=True) + 1 self.chunkpad = curses.newpad(self.numpadlines, self.xscreensize) # todo: try to resize commit message window if possible except curses.error: pass def getcolorpair(self, fgcolor=None, bgcolor=None, name=None, attrlist=None): """ get a curses color pair, adding it to self.colorpairs if it is not already defined. an optional string, name, can be passed as a shortcut for referring to the color-pair. by default, if no arguments are specified, the white foreground / black background color-pair is returned. it is expected that this function will be used exclusively for initializing color pairs, and not curses.init_pair(). attrlist is used to 'flavor' the returned color-pair. this information is not stored in self.colorpairs. it contains attribute values like curses.A_BOLD. """ if (name is not None) and name in self.colorpairnames: # then get the associated color pair and return it colorpair = self.colorpairnames[name] else: if fgcolor is None: fgcolor = -1 if bgcolor is None: bgcolor = -1 if (fgcolor, bgcolor) in self.colorpairs: colorpair = self.colorpairs[(fgcolor, bgcolor)] else: pairindex = len(self.colorpairs) + 1 curses.init_pair(pairindex, fgcolor, bgcolor) colorpair = self.colorpairs[(fgcolor, bgcolor)] = ( curses.color_pair(pairindex)) if name is not None: self.colorpairnames[name] = curses.color_pair(pairindex) # add attributes if possible if attrlist is None: attrlist = [] if colorpair < 256: # then it is safe to apply all attributes for textattr in attrlist: colorpair |= textattr else: # just apply a select few (safe?) attributes for textattrib in (curses.A_UNDERLINE, curses.A_BOLD): if textattrib in attrlist: colorpair |= textattrib return colorpair def initcolorpair(self, *args, **kwargs): "same as getcolorpair." self.getcolorpair(*args, **kwargs) def helpwindow(self): "print a help window to the screen. exit after any keypress." helptext = """ [press any key to return to the patch-display] crecord allows you to interactively choose among the changes you have made, and confirm only those changes you select for further processing by the command you are running (commit/shelve/revert), after confirming the selected changes, the unselected changes are still present in your working copy, so you can use crecord multiple times to split large changes into smaller changesets. the following are valid keystrokes: [space] : (un-)select item ([~]/[x] = partly/fully applied) A : (un-)select all items up/down-arrow [k/j] : go to previous/next unfolded item pgup/pgdn [K/J] : go to previous/next item of same type right/left-arrow [l/h] : go to child item / parent item shift-left-arrow [H] : go to parent header / fold selected header f : fold / unfold item, hiding/revealing its children F : fold / unfold parent item and all of its ancestors m : edit / resume editing the commit message e : edit the currently selected hunk a : toggle amend mode, only with commit -i c : confirm selected changes r : review/edit and confirm selected changes q : quit without confirming (no changes will be made) ? : help (what you're currently reading)""" helpwin = curses.newwin(self.yscreensize, 0, 0, 0) helplines = helptext.split("\n") helplines = helplines + [" "]*( self.yscreensize - self.numstatuslines - len(helplines) - 1) try: for line in helplines: self.printstring(helpwin, line, pairname="legend") except curses.error: pass helpwin.refresh() try: helpwin.getkey() except curses.error: pass def confirmationwindow(self, windowtext): "display an informational window, then wait for and return a keypress." confirmwin = curses.newwin(self.yscreensize, 0, 0, 0) try: lines = windowtext.split("\n") for line in lines: self.printstring(confirmwin, line, pairname="selected") except curses.error: pass self.stdscr.refresh() confirmwin.refresh() try: response = chr(self.stdscr.getch()) except ValueError: response = None return response def reviewcommit(self): """ask for 'y' to be pressed to confirm selected. return True if confirmed.""" confirmtext = ( """if you answer yes to the following, the your currently chosen patch chunks will be loaded into an editor. you may modify the patch from the editor, and save the changes if you wish to change the patch. otherwise, you can just close the editor without saving to accept the current patch as-is. note: don't add/remove lines unless you also modify the range information. failing to follow this rule will result in the commit aborting. are you sure you want to review/edit and confirm the selected changes [yn]? """) response = self.confirmationwindow(confirmtext) if response is None: response = "n" if response.lower().startswith("y"): return True else: return False def toggleamend(self, opts, test): """Toggle the amend flag. When the amend flag is set, a commit will modify the most recently committed changeset, instead of creating a new changeset. Otherwise, a new changeset will be created (the normal commit behavior). """ try: ver = float(util.version()[:3]) except ValueError: ver = 1 if ver < 2.19: msg = ("The amend option is unavailable with hg versions < 2.2\n\n" "Press any key to continue.") elif opts.get('amend') is None: opts['amend'] = True msg = ("Amend option is turned on -- commiting the currently " "selected changes will not create a new changeset, but " "instead update the most recently committed changeset.\n\n" "Press any key to continue.") elif opts.get('amend') is True: opts['amend'] = None msg = ("Amend option is turned off -- commiting the currently " "selected changes will create a new changeset.\n\n" "Press any key to continue.") if not test: self.confirmationwindow(msg) def recenterdisplayedarea(self): """ once we scrolled with pg up pg down we can be pointing outside of the display zone. we print the patch with towin=False to compute the location of the selected item even though it is outside of the displayed zone and then update the scroll. """ self.printitem(towin=False) self.updatescroll() def toggleedit(self, item=None, test=False): """ edit the currently selected chunk """ def updateui(self): self.numpadlines = self.getnumlinesdisplayed(ignorefolding=True) + 1 self.chunkpad = curses.newpad(self.numpadlines, self.xscreensize) self.updatescroll() self.stdscr.refresh() self.statuswin.refresh() self.stdscr.keypad(1) def editpatchwitheditor(self, chunk): if chunk is None: self.ui.write(_('cannot edit patch for whole file')) self.ui.write("\n") return None if chunk.header.binary(): self.ui.write(_('cannot edit patch for binary file')) self.ui.write("\n") return None # write the initial patch patch = stringio() patch.write(diffhelptext + hunkhelptext) chunk.header.write(patch) chunk.write(patch) # start the editor and wait for it to complete try: patch = self.ui.edit(patch.getvalue(), "", extra={"suffix": ".diff"}) except error.Abort as exc: self.errorstr = str(exc) return None # remove comment lines patch = [line + '\n' for line in patch.splitlines() if not line.startswith('#')] return patchmod.parsepatch(patch) if item is None: item = self.currentselecteditem if isinstance(item, uiheader): return if isinstance(item, uihunkline): item = item.parentitem() if not isinstance(item, uihunk): return # To go back to that hunk or its replacement at the end of the edit itemindex = item.parentitem().hunks.index(item) beforeadded, beforeremoved = item.added, item.removed newpatches = editpatchwitheditor(self, item) if newpatches is None: if not test: updateui(self) return header = item.header editedhunkindex = header.hunks.index(item) hunksbefore = header.hunks[:editedhunkindex] hunksafter = header.hunks[editedhunkindex + 1:] newpatchheader = newpatches[0] newhunks = [uihunk(h, header) for h in newpatchheader.hunks] newadded = sum([h.added for h in newhunks]) newremoved = sum([h.removed for h in newhunks]) offset = (newadded - beforeadded) - (newremoved - beforeremoved) for h in hunksafter: h.toline += offset for h in newhunks: h.folded = False header.hunks = hunksbefore + newhunks + hunksafter if self.emptypatch(): header.hunks = hunksbefore + [item] + hunksafter self.currentselecteditem = header if len(header.hunks) > itemindex: self.currentselecteditem = header.hunks[itemindex] if not test: updateui(self) def emptypatch(self): item = self.headerlist if not item: return True for header in item: if header.hunks: return False return True def handlekeypressed(self, keypressed, test=False): """ Perform actions based on pressed keys. Return true to exit the main loop. """ if keypressed in ["k", "KEY_UP"]: self.uparrowevent() if keypressed in ["K", "KEY_PPAGE"]: self.uparrowshiftevent() elif keypressed in ["j", "KEY_DOWN"]: self.downarrowevent() elif keypressed in ["J", "KEY_NPAGE"]: self.downarrowshiftevent() elif keypressed in ["l", "KEY_RIGHT"]: self.rightarrowevent() elif keypressed in ["h", "KEY_LEFT"]: self.leftarrowevent() elif keypressed in ["H", "KEY_SLEFT"]: self.leftarrowshiftevent() elif keypressed in ["q"]: raise error.Abort(_('user quit')) elif keypressed in ['a']: self.toggleamend(self.opts, test) elif keypressed in ["c"]: return True elif test and keypressed in ['X']: return True elif keypressed in ["r"]: if self.reviewcommit(): self.opts['review'] = True return True elif test and keypressed in ['R']: self.opts['review'] = True return True elif keypressed in [' '] or (test and keypressed in ["TOGGLE"]): self.toggleapply() elif keypressed in ['A']: self.toggleall() elif keypressed in ['e']: self.toggleedit(test=test) elif keypressed in ["f"]: self.togglefolded() elif keypressed in ["F"]: self.togglefolded(foldparent=True) elif keypressed in ["?"]: self.helpwindow() self.stdscr.clear() self.stdscr.refresh() def main(self, stdscr): """ method to be wrapped by curses.wrapper() for selecting chunks. """ signal.signal(signal.SIGWINCH, self.sigwinchhandler) self.stdscr = stdscr # error during initialization, cannot be printed in the curses # interface, it should be printed by the calling code self.initerr = None self.yscreensize, self.xscreensize = self.stdscr.getmaxyx() curses.start_color() curses.use_default_colors() # available colors: black, blue, cyan, green, magenta, white, yellow # init_pair(color_id, foreground_color, background_color) self.initcolorpair(None, None, name="normal") self.initcolorpair(curses.COLOR_WHITE, curses.COLOR_MAGENTA, name="selected") self.initcolorpair(curses.COLOR_RED, None, name="deletion") self.initcolorpair(curses.COLOR_GREEN, None, name="addition") self.initcolorpair(curses.COLOR_WHITE, curses.COLOR_BLUE, name="legend") # newwin([height, width,] begin_y, begin_x) self.statuswin = curses.newwin(self.numstatuslines, 0, 0, 0) self.statuswin.keypad(1) # interpret arrow-key, etc. esc sequences # figure out how much space to allocate for the chunk-pad which is # used for displaying the patch # stupid hack to prevent getnumlinesdisplayed from failing self.chunkpad = curses.newpad(1, self.xscreensize) # add 1 so to account for last line text reaching end of line self.numpadlines = self.getnumlinesdisplayed(ignorefolding=True) + 1 try: self.chunkpad = curses.newpad(self.numpadlines, self.xscreensize) except curses.error: self.initerr = _('this diff is too large to be displayed') return # initialize selecteitemendline (initial start-line is 0) self.selecteditemendline = self.getnumlinesdisplayed( self.currentselecteditem, recursechildren=False) while True: self.updatescreen() try: keypressed = self.statuswin.getkey() if self.errorstr is not None: self.errorstr = None continue except curses.error: keypressed = "foobar" if self.handlekeypressed(keypressed): break