| import string |
| #from Tkinter import TclError |
| #import tkMessageBox |
| #import tkSimpleDialog |
| |
| ###$ event <<newline-and-indent>> |
| ###$ win <Key-Return> |
| ###$ win <KP_Enter> |
| ###$ unix <Key-Return> |
| ###$ unix <KP_Enter> |
| |
| ###$ event <<indent-region>> |
| ###$ win <Control-bracketright> |
| ###$ unix <Alt-bracketright> |
| ###$ unix <Control-bracketright> |
| |
| ###$ event <<dedent-region>> |
| ###$ win <Control-bracketleft> |
| ###$ unix <Alt-bracketleft> |
| ###$ unix <Control-bracketleft> |
| |
| ###$ event <<comment-region>> |
| ###$ win <Alt-Key-3> |
| ###$ unix <Alt-Key-3> |
| |
| ###$ event <<uncomment-region>> |
| ###$ win <Alt-Key-4> |
| ###$ unix <Alt-Key-4> |
| |
| ###$ event <<tabify-region>> |
| ###$ win <Alt-Key-5> |
| ###$ unix <Alt-Key-5> |
| |
| ###$ event <<untabify-region>> |
| ###$ win <Alt-Key-6> |
| ###$ unix <Alt-Key-6> |
| |
| import PyParse |
| |
| class AutoIndent: |
| |
| menudefs = [ |
| ('format', [ # /s/edit/format dscherer@cmu.edu |
| ('_Indent region', '<<indent-region>>'), |
| ('_Dedent region', '<<dedent-region>>'), |
| ('Comment _out region', '<<comment-region>>'), |
| ('U_ncomment region', '<<uncomment-region>>'), |
| ('Tabify region', '<<tabify-region>>'), |
| ('Untabify region', '<<untabify-region>>'), |
| ('Toggle tabs', '<<toggle-tabs>>'), |
| ('New indent width', '<<change-indentwidth>>'), |
| ]), |
| ] |
| |
| # usetabs true -> literal tab characters are used by indent and |
| # dedent cmds, possibly mixed with spaces if |
| # indentwidth is not a multiple of tabwidth |
| # false -> tab characters are converted to spaces by indent |
| # and dedent cmds, and ditto TAB keystrokes |
| # indentwidth is the number of characters per logical indent level. |
| # tabwidth is the display width of a literal tab character. |
| # CAUTION: telling Tk to use anything other than its default |
| # tab setting causes it to use an entirely different tabbing algorithm, |
| # treating tab stops as fixed distances from the left margin. |
| # Nobody expects this, so for now tabwidth should never be changed. |
| usetabs = 1 |
| indentwidth = 4 |
| tabwidth = 8 # for IDLE use, must remain 8 until Tk is fixed |
| |
| # If context_use_ps1 is true, parsing searches back for a ps1 line; |
| # else searches for a popular (if, def, ...) Python stmt. |
| context_use_ps1 = 0 |
| |
| # When searching backwards for a reliable place to begin parsing, |
| # first start num_context_lines[0] lines back, then |
| # num_context_lines[1] lines back if that didn't work, and so on. |
| # The last value should be huge (larger than the # of lines in a |
| # conceivable file). |
| # Making the initial values larger slows things down more often. |
| num_context_lines = 50, 500, 5000000 |
| |
| def __init__(self, editwin): |
| self.editwin = editwin |
| self.text = editwin.text |
| |
| def config(self, **options): |
| for key, value in options.items(): |
| if key == 'usetabs': |
| self.usetabs = value |
| elif key == 'indentwidth': |
| self.indentwidth = value |
| elif key == 'tabwidth': |
| self.tabwidth = value |
| elif key == 'context_use_ps1': |
| self.context_use_ps1 = value |
| else: |
| raise KeyError, "bad option name: %s" % `key` |
| |
| # If ispythonsource and guess are true, guess a good value for |
| # indentwidth based on file content (if possible), and if |
| # indentwidth != tabwidth set usetabs false. |
| # In any case, adjust the Text widget's view of what a tab |
| # character means. |
| |
| def set_indentation_params(self, ispythonsource, guess=1): |
| if guess and ispythonsource: |
| i = self.guess_indent() |
| if 2 <= i <= 8: |
| self.indentwidth = i |
| if self.indentwidth != self.tabwidth: |
| self.usetabs = 0 |
| |
| self.editwin.set_tabwidth(self.tabwidth) |
| |
| def smart_backspace_event(self, event): |
| text = self.text |
| first, last = self.editwin.get_selection_indices() |
| if first and last: |
| text.delete(first, last) |
| text.mark_set("insert", first) |
| return "break" |
| # Delete whitespace left, until hitting a real char or closest |
| # preceding virtual tab stop. |
| chars = text.get("insert linestart", "insert") |
| if chars == '': |
| if text.compare("insert", ">", "1.0"): |
| # easy: delete preceding newline |
| text.delete("insert-1c") |
| else: |
| text.bell() # at start of buffer |
| return "break" |
| if chars[-1] not in " \t": |
| # easy: delete preceding real char |
| text.delete("insert-1c") |
| return "break" |
| # Ick. It may require *inserting* spaces if we back up over a |
| # tab character! This is written to be clear, not fast. |
| expand, tabwidth = string.expandtabs, self.tabwidth |
| have = len(expand(chars, tabwidth)) |
| assert have > 0 |
| want = ((have - 1) // self.indentwidth) * self.indentwidth |
| ncharsdeleted = 0 |
| while 1: |
| chars = chars[:-1] |
| ncharsdeleted = ncharsdeleted + 1 |
| have = len(expand(chars, tabwidth)) |
| if have <= want or chars[-1] not in " \t": |
| break |
| text.undo_block_start() |
| text.delete("insert-%dc" % ncharsdeleted, "insert") |
| if have < want: |
| text.insert("insert", ' ' * (want - have)) |
| text.undo_block_stop() |
| return "break" |
| |
| def smart_indent_event(self, event): |
| # if intraline selection: |
| # delete it |
| # elif multiline selection: |
| # do indent-region & return |
| # indent one level |
| text = self.text |
| first, last = self.editwin.get_selection_indices() |
| text.undo_block_start() |
| try: |
| if first and last: |
| if index2line(first) != index2line(last): |
| return self.indent_region_event(event) |
| text.delete(first, last) |
| text.mark_set("insert", first) |
| prefix = text.get("insert linestart", "insert") |
| raw, effective = classifyws(prefix, self.tabwidth) |
| if raw == len(prefix): |
| # only whitespace to the left |
| self.reindent_to(effective + self.indentwidth) |
| else: |
| if self.usetabs: |
| pad = '\t' |
| else: |
| effective = len(string.expandtabs(prefix, |
| self.tabwidth)) |
| n = self.indentwidth |
| pad = ' ' * (n - effective % n) |
| text.insert("insert", pad) |
| text.see("insert") |
| return "break" |
| finally: |
| text.undo_block_stop() |
| |
| def newline_and_indent_event(self, event): |
| text = self.text |
| first, last = self.editwin.get_selection_indices() |
| text.undo_block_start() |
| try: |
| if first and last: |
| text.delete(first, last) |
| text.mark_set("insert", first) |
| line = text.get("insert linestart", "insert") |
| i, n = 0, len(line) |
| while i < n and line[i] in " \t": |
| i = i+1 |
| if i == n: |
| # the cursor is in or at leading indentation; just inject |
| # an empty line at the start |
| text.insert("insert linestart", '\n') |
| return "break" |
| indent = line[:i] |
| # strip whitespace before insert point |
| i = 0 |
| while line and line[-1] in " \t": |
| line = line[:-1] |
| i = i+1 |
| if i: |
| text.delete("insert - %d chars" % i, "insert") |
| # strip whitespace after insert point |
| while text.get("insert") in " \t": |
| text.delete("insert") |
| # start new line |
| text.insert("insert", '\n') |
| |
| # adjust indentation for continuations and block |
| # open/close first need to find the last stmt |
| lno = index2line(text.index('insert')) |
| y = PyParse.Parser(self.indentwidth, self.tabwidth) |
| for context in self.num_context_lines: |
| startat = max(lno - context, 1) |
| startatindex = `startat` + ".0" |
| rawtext = text.get(startatindex, "insert") |
| y.set_str(rawtext) |
| bod = y.find_good_parse_start( |
| self.context_use_ps1, |
| self._build_char_in_string_func(startatindex)) |
| if bod is not None or startat == 1: |
| break |
| y.set_lo(bod or 0) |
| c = y.get_continuation_type() |
| if c != PyParse.C_NONE: |
| # The current stmt hasn't ended yet. |
| if c == PyParse.C_STRING: |
| # inside a string; just mimic the current indent |
| text.insert("insert", indent) |
| elif c == PyParse.C_BRACKET: |
| # line up with the first (if any) element of the |
| # last open bracket structure; else indent one |
| # level beyond the indent of the line with the |
| # last open bracket |
| self.reindent_to(y.compute_bracket_indent()) |
| elif c == PyParse.C_BACKSLASH: |
| # if more than one line in this stmt already, just |
| # mimic the current indent; else if initial line |
| # has a start on an assignment stmt, indent to |
| # beyond leftmost =; else to beyond first chunk of |
| # non-whitespace on initial line |
| if y.get_num_lines_in_stmt() > 1: |
| text.insert("insert", indent) |
| else: |
| self.reindent_to(y.compute_backslash_indent()) |
| else: |
| assert 0, "bogus continuation type " + `c` |
| return "break" |
| |
| # This line starts a brand new stmt; indent relative to |
| # indentation of initial line of closest preceding |
| # interesting stmt. |
| indent = y.get_base_indent_string() |
| text.insert("insert", indent) |
| if y.is_block_opener(): |
| self.smart_indent_event(event) |
| elif indent and y.is_block_closer(): |
| self.smart_backspace_event(event) |
| return "break" |
| finally: |
| text.see("insert") |
| text.undo_block_stop() |
| |
| auto_indent = newline_and_indent_event |
| |
| # Our editwin provides a is_char_in_string function that works |
| # with a Tk text index, but PyParse only knows about offsets into |
| # a string. This builds a function for PyParse that accepts an |
| # offset. |
| |
| def _build_char_in_string_func(self, startindex): |
| def inner(offset, _startindex=startindex, |
| _icis=self.editwin.is_char_in_string): |
| return _icis(_startindex + "+%dc" % offset) |
| return inner |
| |
| def indent_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| for pos in range(len(lines)): |
| line = lines[pos] |
| if line: |
| raw, effective = classifyws(line, self.tabwidth) |
| effective = effective + self.indentwidth |
| lines[pos] = self._make_blanks(effective) + line[raw:] |
| self.set_region(head, tail, chars, lines) |
| return "break" |
| |
| def dedent_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| for pos in range(len(lines)): |
| line = lines[pos] |
| if line: |
| raw, effective = classifyws(line, self.tabwidth) |
| effective = max(effective - self.indentwidth, 0) |
| lines[pos] = self._make_blanks(effective) + line[raw:] |
| self.set_region(head, tail, chars, lines) |
| return "break" |
| |
| def comment_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| for pos in range(len(lines) - 1): |
| line = lines[pos] |
| lines[pos] = '##' + line |
| self.set_region(head, tail, chars, lines) |
| |
| def uncomment_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| for pos in range(len(lines)): |
| line = lines[pos] |
| if not line: |
| continue |
| if line[:2] == '##': |
| line = line[2:] |
| elif line[:1] == '#': |
| line = line[1:] |
| lines[pos] = line |
| self.set_region(head, tail, chars, lines) |
| |
| def tabify_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| tabwidth = self._asktabwidth() |
| for pos in range(len(lines)): |
| line = lines[pos] |
| if line: |
| raw, effective = classifyws(line, tabwidth) |
| ntabs, nspaces = divmod(effective, tabwidth) |
| lines[pos] = '\t' * ntabs + ' ' * nspaces + line[raw:] |
| self.set_region(head, tail, chars, lines) |
| |
| def untabify_region_event(self, event): |
| head, tail, chars, lines = self.get_region() |
| tabwidth = self._asktabwidth() |
| for pos in range(len(lines)): |
| lines[pos] = string.expandtabs(lines[pos], tabwidth) |
| self.set_region(head, tail, chars, lines) |
| |
| def toggle_tabs_event(self, event): |
| if self.editwin.askyesno( |
| "Toggle tabs", |
| "Turn tabs " + ("on", "off")[self.usetabs] + "?", |
| parent=self.text): |
| self.usetabs = not self.usetabs |
| return "break" |
| |
| # XXX this isn't bound to anything -- see class tabwidth comments |
| def change_tabwidth_event(self, event): |
| new = self._asktabwidth() |
| if new != self.tabwidth: |
| self.tabwidth = new |
| self.set_indentation_params(0, guess=0) |
| return "break" |
| |
| def change_indentwidth_event(self, event): |
| new = self.editwin.askinteger( |
| "Indent width", |
| "New indent width (1-16)", |
| parent=self.text, |
| initialvalue=self.indentwidth, |
| minvalue=1, |
| maxvalue=16) |
| if new and new != self.indentwidth: |
| self.indentwidth = new |
| return "break" |
| |
| def get_region(self): |
| text = self.text |
| first, last = self.editwin.get_selection_indices() |
| if first and last: |
| head = text.index(first + " linestart") |
| tail = text.index(last + "-1c lineend +1c") |
| else: |
| head = text.index("insert linestart") |
| tail = text.index("insert lineend +1c") |
| chars = text.get(head, tail) |
| lines = string.split(chars, "\n") |
| return head, tail, chars, lines |
| |
| def set_region(self, head, tail, chars, lines): |
| text = self.text |
| newchars = string.join(lines, "\n") |
| if newchars == chars: |
| text.bell() |
| return |
| text.tag_remove("sel", "1.0", "end") |
| text.mark_set("insert", head) |
| text.undo_block_start() |
| text.delete(head, tail) |
| text.insert(head, newchars) |
| text.undo_block_stop() |
| text.tag_add("sel", head, "insert") |
| |
| # Make string that displays as n leading blanks. |
| |
| def _make_blanks(self, n): |
| if self.usetabs: |
| ntabs, nspaces = divmod(n, self.tabwidth) |
| return '\t' * ntabs + ' ' * nspaces |
| else: |
| return ' ' * n |
| |
| # Delete from beginning of line to insert point, then reinsert |
| # column logical (meaning use tabs if appropriate) spaces. |
| |
| def reindent_to(self, column): |
| text = self.text |
| text.undo_block_start() |
| if text.compare("insert linestart", "!=", "insert"): |
| text.delete("insert linestart", "insert") |
| if column: |
| text.insert("insert", self._make_blanks(column)) |
| text.undo_block_stop() |
| |
| def _asktabwidth(self): |
| return self.editwin.askinteger( |
| "Tab width", |
| "Spaces per tab?", |
| parent=self.text, |
| initialvalue=self.tabwidth, |
| minvalue=1, |
| maxvalue=16) or self.tabwidth |
| |
| # Guess indentwidth from text content. |
| # Return guessed indentwidth. This should not be believed unless |
| # it's in a reasonable range (e.g., it will be 0 if no indented |
| # blocks are found). |
| |
| def guess_indent(self): |
| opener, indented = IndentSearcher(self.text, self.tabwidth).run() |
| if opener and indented: |
| raw, indentsmall = classifyws(opener, self.tabwidth) |
| raw, indentlarge = classifyws(indented, self.tabwidth) |
| else: |
| indentsmall = indentlarge = 0 |
| return indentlarge - indentsmall |
| |
| # "line.col" -> line, as an int |
| def index2line(index): |
| return int(float(index)) |
| |
| # Look at the leading whitespace in s. |
| # Return pair (# of leading ws characters, |
| # effective # of leading blanks after expanding |
| # tabs to width tabwidth) |
| |
| def classifyws(s, tabwidth): |
| raw = effective = 0 |
| for ch in s: |
| if ch == ' ': |
| raw = raw + 1 |
| effective = effective + 1 |
| elif ch == '\t': |
| raw = raw + 1 |
| effective = (effective // tabwidth + 1) * tabwidth |
| else: |
| break |
| return raw, effective |
| |
| import tokenize |
| _tokenize = tokenize |
| del tokenize |
| |
| class IndentSearcher: |
| |
| # .run() chews over the Text widget, looking for a block opener |
| # and the stmt following it. Returns a pair, |
| # (line containing block opener, line containing stmt) |
| # Either or both may be None. |
| |
| def __init__(self, text, tabwidth): |
| self.text = text |
| self.tabwidth = tabwidth |
| self.i = self.finished = 0 |
| self.blkopenline = self.indentedline = None |
| |
| def readline(self): |
| if self.finished: |
| return "" |
| i = self.i = self.i + 1 |
| mark = `i` + ".0" |
| if self.text.compare(mark, ">=", "end"): |
| return "" |
| return self.text.get(mark, mark + " lineend+1c") |
| |
| def tokeneater(self, type, token, start, end, line, |
| INDENT=_tokenize.INDENT, |
| NAME=_tokenize.NAME, |
| OPENERS=('class', 'def', 'for', 'if', 'try', 'while')): |
| if self.finished: |
| pass |
| elif type == NAME and token in OPENERS: |
| self.blkopenline = line |
| elif type == INDENT and self.blkopenline: |
| self.indentedline = line |
| self.finished = 1 |
| |
| def run(self): |
| save_tabsize = _tokenize.tabsize |
| _tokenize.tabsize = self.tabwidth |
| try: |
| try: |
| _tokenize.tokenize(self.readline, self.tokeneater) |
| except _tokenize.TokenError: |
| # since we cut off the tokenizer early, we can trigger |
| # spurious errors |
| pass |
| finally: |
| _tokenize.tabsize = save_tabsize |
| return self.blkopenline, self.indentedline |