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Text File | 2005-10-18 | 52KB | 1,410 lines

import sys import os import re import imp from itertools import count from Tkinter import * import tkSimpleDialog import tkMessageBox import webbrowser import idlever import WindowList import SearchDialog import GrepDialog import ReplaceDialog import PyParse from configHandler import idleConf import aboutDialog, textView, configDialog # The default tab setting for a Text widget, in average-width characters. TK_TABWIDTH_DEFAULT = 8 def _find_module(fullname, path=None): """Version of imp.find_module() that handles hierarchical module names""" file = None for tgt in fullname.split('.'): if file is not None: file.close() # close intermediate files (file, filename, descr) = imp.find_module(tgt, path) if descr[2] == imp.PY_SOURCE: break # find but not load the source file module = imp.load_module(tgt, file, filename, descr) try: path = module.__path__ except AttributeError: raise ImportError, 'No source for module ' + module.__name__ return file, filename, descr class EditorWindow: from Percolator import Percolator from ColorDelegator import ColorDelegator from UndoDelegator import UndoDelegator from IOBinding import IOBinding import Bindings from Tkinter import Toplevel from MultiStatusBar import MultiStatusBar help_url = None def __init__(self, flist=None, filename=None, key=None, root=None): if EditorWindow.help_url is None: dochome = os.path.join(sys.prefix, 'Doc', 'index.html') if sys.platform.count('linux'): # look for html docs in a couple of standard places pyver = 'python-docs-' + '%s.%s.%s' % sys.version_info[:3] if os.path.isdir('/var/www/html/python/'): # "python2" rpm dochome = '/var/www/html/python/index.html' else: basepath = '/usr/share/doc/' # standard location dochome = os.path.join(basepath, pyver, 'Doc', 'index.html') elif sys.platform[:3] == 'win': chmfile = os.path.join(sys.prefix, 'Doc', 'Python%d%d.chm' % sys.version_info[:2]) if os.path.isfile(chmfile): dochome = chmfile dochome = os.path.normpath(dochome) if os.path.isfile(dochome): EditorWindow.help_url = dochome else: EditorWindow.help_url = "http://www.python.org/doc/current" currentTheme=idleConf.CurrentTheme() self.flist = flist root = root or flist.root self.root = root self.menubar = Menu(root) self.top = top = WindowList.ListedToplevel(root, menu=self.menubar) if flist: self.tkinter_vars = flist.vars #self.top.instance_dict makes flist.inversedict avalable to #configDialog.py so it can access all EditorWindow instaces self.top.instance_dict=flist.inversedict else: self.tkinter_vars = {} # keys: Tkinter event names # values: Tkinter variable instances self.recent_files_path=os.path.join(idleConf.GetUserCfgDir(), 'recent-files.lst') self.vbar = vbar = Scrollbar(top, name='vbar') self.text_frame = text_frame = Frame(top) self.width = idleConf.GetOption('main','EditorWindow','width') self.text = text = Text(text_frame, name='text', padx=5, wrap='none', foreground=idleConf.GetHighlight(currentTheme, 'normal',fgBg='fg'), background=idleConf.GetHighlight(currentTheme, 'normal',fgBg='bg'), highlightcolor=idleConf.GetHighlight(currentTheme, 'hilite',fgBg='fg'), highlightbackground=idleConf.GetHighlight(currentTheme, 'hilite',fgBg='bg'), insertbackground=idleConf.GetHighlight(currentTheme, 'cursor',fgBg='fg'), width=self.width, height=idleConf.GetOption('main','EditorWindow','height') ) self.top.focused_widget = self.text self.createmenubar() self.apply_bindings() self.top.protocol("WM_DELETE_WINDOW", self.close) self.top.bind("<<close-window>>", self.close_event) text.bind("<<cut>>", self.cut) text.bind("<<copy>>", self.copy) text.bind("<<paste>>", self.paste) text.bind("<<center-insert>>", self.center_insert_event) text.bind("<<help>>", self.help_dialog) text.bind("<<python-docs>>", self.python_docs) text.bind("<<about-idle>>", self.about_dialog) text.bind("<<open-config-dialog>>", self.config_dialog) text.bind("<<open-module>>", self.open_module) text.bind("<<do-nothing>>", lambda event: "break") text.bind("<<select-all>>", self.select_all) text.bind("<<remove-selection>>", self.remove_selection) text.bind("<<find>>", self.find_event) text.bind("<<find-again>>", self.find_again_event) text.bind("<<find-in-files>>", self.find_in_files_event) text.bind("<<find-selection>>", self.find_selection_event) text.bind("<<replace>>", self.replace_event) text.bind("<<goto-line>>", self.goto_line_event) text.bind("<3>", self.right_menu_event) text.bind("<<smart-backspace>>",self.smart_backspace_event) text.bind("<<newline-and-indent>>",self.newline_and_indent_event) text.bind("<<smart-indent>>",self.smart_indent_event) text.bind("<<indent-region>>",self.indent_region_event) text.bind("<<dedent-region>>",self.dedent_region_event) text.bind("<<comment-region>>",self.comment_region_event) text.bind("<<uncomment-region>>",self.uncomment_region_event) text.bind("<<tabify-region>>",self.tabify_region_event) text.bind("<<untabify-region>>",self.untabify_region_event) text.bind("<<toggle-tabs>>",self.toggle_tabs_event) text.bind("<<change-indentwidth>>",self.change_indentwidth_event) text.bind("<Left>", self.move_at_edge_if_selection(0)) text.bind("<Right>", self.move_at_edge_if_selection(1)) if flist: flist.inversedict[self] = key if key: flist.dict[key] = self text.bind("<<open-new-window>>", self.new_callback) text.bind("<<close-all-windows>>", self.flist.close_all_callback) text.bind("<<open-class-browser>>", self.open_class_browser) text.bind("<<open-path-browser>>", self.open_path_browser) self.set_status_bar() vbar['command'] = text.yview vbar.pack(side=RIGHT, fill=Y) text['yscrollcommand'] = vbar.set fontWeight='normal' if idleConf.GetOption('main','EditorWindow','font-bold',type='bool'): fontWeight='bold' text.config(font=(idleConf.GetOption('main','EditorWindow','font'), idleConf.GetOption('main','EditorWindow','font-size'), fontWeight)) text_frame.pack(side=LEFT, fill=BOTH, expand=1) text.pack(side=TOP, fill=BOTH, expand=1) text.focus_set() self.per = per = self.Percolator(text) if self.ispythonsource(filename): self.color = color = self.ColorDelegator() per.insertfilter(color) else: self.color = None self.undo = undo = self.UndoDelegator() per.insertfilter(undo) text.undo_block_start = undo.undo_block_start text.undo_block_stop = undo.undo_block_stop undo.set_saved_change_hook(self.saved_change_hook) # IOBinding implements file I/O and printing functionality self.io = io = self.IOBinding(self) io.set_filename_change_hook(self.filename_change_hook) # Create the recent files submenu self.recent_files_menu = Menu(self.menubar) self.menudict['file'].insert_cascade(3, label='Recent Files', underline=0, menu=self.recent_files_menu) self.update_recent_files_list() if filename: if os.path.exists(filename) and not os.path.isdir(filename): io.loadfile(filename) else: io.set_filename(filename) self.saved_change_hook() self.load_extensions() menu = self.menudict.get('windows') if menu: end = menu.index("end") if end is None: end = -1 if end >= 0: menu.add_separator() end = end + 1 self.wmenu_end = end WindowList.register_callback(self.postwindowsmenu) # Some abstractions so IDLE extensions are cross-IDE self.askyesno = tkMessageBox.askyesno self.askinteger = tkSimpleDialog.askinteger self.showerror = tkMessageBox.showerror if self.extensions.has_key('AutoIndent'): self.extensions['AutoIndent'].set_indentation_params( self.ispythonsource(filename)) def new_callback(self, event): dirname, basename = self.io.defaultfilename() self.flist.new(dirname) return "break" def set_status_bar(self): self.status_bar = self.MultiStatusBar(self.top) self.status_bar.set_label('column', 'Col: ?', side=RIGHT) self.status_bar.set_label('line', 'Ln: ?', side=RIGHT) self.status_bar.pack(side=BOTTOM, fill=X) self.text.bind('<KeyRelease>', self.set_line_and_column) self.text.bind('<ButtonRelease>', self.set_line_and_column) self.text.after_idle(self.set_line_and_column) def set_line_and_column(self, event=None): line, column = self.text.index(INSERT).split('.') self.status_bar.set_label('column', 'Col: %s' % column) self.status_bar.set_label('line', 'Ln: %s' % line) menu_specs = [ ("file", "_File"), ("edit", "_Edit"), ("format", "F_ormat"), ("run", "_Run"), ("options", "_Options"), ("windows", "_Windows"), ("help", "_Help"), ] def createmenubar(self): mbar = self.menubar self.menudict = menudict = {} for name, label in self.menu_specs: underline, label = prepstr(label) menudict[name] = menu = Menu(mbar, name=name) mbar.add_cascade(label=label, menu=menu, underline=underline) self.fill_menus() self.base_helpmenu_length = self.menudict['help'].index(END) self.reset_help_menu_entries() def postwindowsmenu(self): # Only called when Windows menu exists menu = self.menudict['windows'] end = menu.index("end") if end is None: end = -1 if end > self.wmenu_end: menu.delete(self.wmenu_end+1, end) WindowList.add_windows_to_menu(menu) rmenu = None def right_menu_event(self, event): self.text.tag_remove("sel", "1.0", "end") self.text.mark_set("insert", "@%d,%d" % (event.x, event.y)) if not self.rmenu: self.make_rmenu() rmenu = self.rmenu self.event = event iswin = sys.platform[:3] == 'win' if iswin: self.text.config(cursor="arrow") rmenu.tk_popup(event.x_root, event.y_root) if iswin: self.text.config(cursor="ibeam") rmenu_specs = [ # ("Label", "<<virtual-event>>"), ... ("Close", "<<close-window>>"), # Example ] def make_rmenu(self): rmenu = Menu(self.text, tearoff=0) for label, eventname in self.rmenu_specs: def command(text=self.text, eventname=eventname): text.event_generate(eventname) rmenu.add_command(label=label, command=command) self.rmenu = rmenu def about_dialog(self, event=None): aboutDialog.AboutDialog(self.top,'About IDLE') def config_dialog(self, event=None): configDialog.ConfigDialog(self.top,'Settings') def help_dialog(self, event=None): fn=os.path.join(os.path.abspath(os.path.dirname(__file__)),'help.txt') textView.TextViewer(self.top,'Help',fn) def python_docs(self, event=None): if sys.platform[:3] == 'win': os.startfile(self.help_url) else: webbrowser.open(self.help_url) return "break" def cut(self,event): self.text.event_generate("<<Cut>>") return "break" def copy(self,event): self.text.event_generate("<<Copy>>") return "break" def paste(self,event): self.text.event_generate("<<Paste>>") return "break" def select_all(self, event=None): self.text.tag_add("sel", "1.0", "end-1c") self.text.mark_set("insert", "1.0") self.text.see("insert") return "break" def remove_selection(self, event=None): self.text.tag_remove("sel", "1.0", "end") self.text.see("insert") def move_at_edge_if_selection(self, edge_index): """Cursor move begins at start or end of selection When a left/right cursor key is pressed create and return to Tkinter a function which causes a cursor move from the associated edge of the selection. """ self_text_index = self.text.index self_text_mark_set = self.text.mark_set edges_table = ("sel.first+1c", "sel.last-1c") def move_at_edge(event): if (event.state & 5) == 0: # no shift(==1) or control(==4) pressed try: self_text_index("sel.first") self_text_mark_set("insert", edges_table[edge_index]) except TclError: pass return move_at_edge def find_event(self, event): SearchDialog.find(self.text) return "break" def find_again_event(self, event): SearchDialog.find_again(self.text) return "break" def find_selection_event(self, event): SearchDialog.find_selection(self.text) return "break" def find_in_files_event(self, event): GrepDialog.grep(self.text, self.io, self.flist) return "break" def replace_event(self, event): ReplaceDialog.replace(self.text) return "break" def goto_line_event(self, event): text = self.text lineno = tkSimpleDialog.askinteger("Goto", "Go to line number:",parent=text) if lineno is None: return "break" if lineno <= 0: text.bell() return "break" text.mark_set("insert", "%d.0" % lineno) text.see("insert") def open_module(self, event=None): # XXX Shouldn't this be in IOBinding or in FileList? try: name = self.text.get("sel.first", "sel.last") except TclError: name = "" else: name = name.strip() name = tkSimpleDialog.askstring("Module", "Enter the name of a Python module\n" "to search on sys.path and open:", parent=self.text, initialvalue=name) if name: name = name.strip() if not name: return # XXX Ought to insert current file's directory in front of path try: (f, file, (suffix, mode, type)) = _find_module(name) except (NameError, ImportError), msg: tkMessageBox.showerror("Import error", str(msg), parent=self.text) return if type != imp.PY_SOURCE: tkMessageBox.showerror("Unsupported type", "%s is not a source module" % name, parent=self.text) return if f: f.close() if self.flist: self.flist.open(file) else: self.io.loadfile(file) def open_class_browser(self, event=None): filename = self.io.filename if not filename: tkMessageBox.showerror( "No filename", "This buffer has no associated filename", master=self.text) self.text.focus_set() return None head, tail = os.path.split(filename) base, ext = os.path.splitext(tail) import ClassBrowser ClassBrowser.ClassBrowser(self.flist, base, [head]) def open_path_browser(self, event=None): import PathBrowser PathBrowser.PathBrowser(self.flist) def gotoline(self, lineno): if lineno is not None and lineno > 0: self.text.mark_set("insert", "%d.0" % lineno) self.text.tag_remove("sel", "1.0", "end") self.text.tag_add("sel", "insert", "insert +1l") self.center() def ispythonsource(self, filename): if not filename: return True base, ext = os.path.splitext(os.path.basename(filename)) if os.path.normcase(ext) in (".py", ".pyw"): return True try: f = open(filename) line = f.readline() f.close() except IOError: return False return line.startswith('#!') and line.find('python') >= 0 def close_hook(self): if self.flist: self.flist.close_edit(self) def set_close_hook(self, close_hook): self.close_hook = close_hook def filename_change_hook(self): if self.flist: self.flist.filename_changed_edit(self) self.saved_change_hook() self.top.update_windowlist_registry(self) if self.ispythonsource(self.io.filename): self.addcolorizer() else: self.rmcolorizer() def addcolorizer(self): if self.color: return self.per.removefilter(self.undo) self.color = self.ColorDelegator() self.per.insertfilter(self.color) self.per.insertfilter(self.undo) def rmcolorizer(self): if not self.color: return self.per.removefilter(self.undo) self.per.removefilter(self.color) self.color = None self.per.insertfilter(self.undo) def ResetColorizer(self): "Update the colour theme if it is changed" # Called from configDialog.py if self.color: self.color = self.ColorDelegator() self.per.insertfilter(self.color) theme = idleConf.GetOption('main','Theme','name') self.text.config(idleConf.GetHighlight(theme, "normal")) def ResetFont(self): "Update the text widgets' font if it is changed" # Called from configDialog.py fontWeight='normal' if idleConf.GetOption('main','EditorWindow','font-bold',type='bool'): fontWeight='bold' self.text.config(font=(idleConf.GetOption('main','EditorWindow','font'), idleConf.GetOption('main','EditorWindow','font-size'), fontWeight)) def ResetKeybindings(self): "Update the keybindings if they are changed" # Called from configDialog.py self.Bindings.default_keydefs=idleConf.GetCurrentKeySet() keydefs = self.Bindings.default_keydefs for event, keylist in keydefs.items(): self.text.event_delete(event) self.apply_bindings() #update menu accelerators menuEventDict={} for menu in self.Bindings.menudefs: menuEventDict[menu[0]]={} for item in menu[1]: if item: menuEventDict[menu[0]][prepstr(item[0])[1]]=item[1] for menubarItem in self.menudict.keys(): menu=self.menudict[menubarItem] end=menu.index(END)+1 for index in range(0,end): if menu.type(index)=='command': accel=menu.entrycget(index,'accelerator') if accel: itemName=menu.entrycget(index,'label') event='' if menuEventDict.has_key(menubarItem): if menuEventDict[menubarItem].has_key(itemName): event=menuEventDict[menubarItem][itemName] if event: accel=get_accelerator(keydefs, event) menu.entryconfig(index,accelerator=accel) def reset_help_menu_entries(self): "Update the additional help entries on the Help menu" help_list = idleConf.GetAllExtraHelpSourcesList() helpmenu = self.menudict['help'] # first delete the extra help entries, if any helpmenu_length = helpmenu.index(END) if helpmenu_length > self.base_helpmenu_length: helpmenu.delete((self.base_helpmenu_length + 1), helpmenu_length) # then rebuild them if help_list: helpmenu.add_separator() for entry in help_list: cmd = self.__extra_help_callback(entry[1]) helpmenu.add_command(label=entry[0], command=cmd) # and update the menu dictionary self.menudict['help'] = helpmenu def __extra_help_callback(self, helpfile): "Create a callback with the helpfile value frozen at definition time" def display_extra_help(helpfile=helpfile): if not (helpfile.startswith('www') or helpfile.startswith('http')): url = os.path.normpath(helpfile) if sys.platform[:3] == 'win': os.startfile(helpfile) else: webbrowser.open(helpfile) return display_extra_help def update_recent_files_list(self, new_file=None): "Load and update the recent files list and menus" rf_list = [] if os.path.exists(self.recent_files_path): rf_list_file = open(self.recent_files_path,'r') try: rf_list = rf_list_file.readlines() finally: rf_list_file.close() if new_file: new_file = os.path.abspath(new_file) + '\n' if new_file in rf_list: rf_list.remove(new_file) # move to top rf_list.insert(0, new_file) # clean and save the recent files list bad_paths = [] for path in rf_list: if '\0' in path or not os.path.exists(path[0:-1]): bad_paths.append(path) rf_list = [path for path in rf_list if path not in bad_paths] ulchars = "1234567890ABCDEFGHIJK" rf_list = rf_list[0:len(ulchars)] rf_file = open(self.recent_files_path, 'w') try: rf_file.writelines(rf_list) finally: rf_file.close() # for each edit window instance, construct the recent files menu for instance in self.top.instance_dict.keys(): menu = instance.recent_files_menu menu.delete(1, END) # clear, and rebuild: for i, file in zip(count(), rf_list): file_name = file[0:-1] # zap \n callback = instance.__recent_file_callback(file_name) menu.add_command(label=ulchars[i] + " " + file_name, command=callback, underline=0) def __recent_file_callback(self, file_name): def open_recent_file(fn_closure=file_name): self.io.open(editFile=fn_closure) return open_recent_file def saved_change_hook(self): short = self.short_title() long = self.long_title() if short and long: title = short + " - " + long elif short: title = short elif long: title = long else: title = "Untitled" icon = short or long or title if not self.get_saved(): title = "*%s*" % title icon = "*%s" % icon self.top.wm_title(title) self.top.wm_iconname(icon) def get_saved(self): return self.undo.get_saved() def set_saved(self, flag): self.undo.set_saved(flag) def reset_undo(self): self.undo.reset_undo() def short_title(self): filename = self.io.filename if filename: filename = os.path.basename(filename) return filename def long_title(self): return self.io.filename or "" def center_insert_event(self, event): self.center() def center(self, mark="insert"): text = self.text top, bot = self.getwindowlines() lineno = self.getlineno(mark) height = bot - top newtop = max(1, lineno - height//2) text.yview(float(newtop)) def getwindowlines(self): text = self.text top = self.getlineno("@0,0") bot = self.getlineno("@0,65535") if top == bot and text.winfo_height() == 1: # Geometry manager hasn't run yet height = int(text['height']) bot = top + height - 1 return top, bot def getlineno(self, mark="insert"): text = self.text return int(float(text.index(mark))) def get_geometry(self): "Return (width, height, x, y)" geom = self.top.wm_geometry() m = re.match(r"(\d+)x(\d+)\+(-?\d+)\+(-?\d+)", geom) tuple = (map(int, m.groups())) return tuple def close_event(self, event): self.close() def maybesave(self): if self.io: if not self.get_saved(): if self.top.state()!='normal': self.top.deiconify() self.top.lower() self.top.lift() return self.io.maybesave() def close(self): reply = self.maybesave() if reply != "cancel": self._close() return reply def _close(self): if self.io.filename: self.update_recent_files_list(new_file=self.io.filename) WindowList.unregister_callback(self.postwindowsmenu) if self.close_hook: self.close_hook() self.flist = None colorizing = 0 self.unload_extensions() self.io.close(); self.io = None self.undo = None # XXX if self.color: colorizing = self.color.colorizing doh = colorizing and self.top self.color.close(doh) # Cancel colorization self.text = None self.tkinter_vars = None self.per.close(); self.per = None if not colorizing: self.top.destroy() def load_extensions(self): self.extensions = {} self.load_standard_extensions() def unload_extensions(self): for ins in self.extensions.values(): if hasattr(ins, "close"): ins.close() self.extensions = {} def load_standard_extensions(self): for name in self.get_standard_extension_names(): try: self.load_extension(name) except: print "Failed to load extension", repr(name) import traceback traceback.print_exc() def get_standard_extension_names(self): return idleConf.GetExtensions(editor_only=True) def load_extension(self, name): try: mod = __import__(name, globals(), locals(), []) except ImportError: print "\nFailed to import extension: ", name return None cls = getattr(mod, name) keydefs = idleConf.GetExtensionBindings(name) if hasattr(cls, "menudefs"): self.fill_menus(cls.menudefs, keydefs) ins = cls(self) self.extensions[name] = ins if keydefs: self.apply_bindings(keydefs) for vevent in keydefs.keys(): methodname = vevent.replace("-", "_") while methodname[:1] == '<': methodname = methodname[1:] while methodname[-1:] == '>': methodname = methodname[:-1] methodname = methodname + "_event" if hasattr(ins, methodname): self.text.bind(vevent, getattr(ins, methodname)) return ins def apply_bindings(self, keydefs=None): if keydefs is None: keydefs = self.Bindings.default_keydefs text = self.text text.keydefs = keydefs for event, keylist in keydefs.items(): if keylist: text.event_add(event, *keylist) def fill_menus(self, menudefs=None, keydefs=None): """Add appropriate entries to the menus and submenus Menus that are absent or None in self.menudict are ignored. """ if menudefs is None: menudefs = self.Bindings.menudefs if keydefs is None: keydefs = self.Bindings.default_keydefs menudict = self.menudict text = self.text for mname, entrylist in menudefs: menu = menudict.get(mname) if not menu: continue for entry in entrylist: if not entry: menu.add_separator() else: label, eventname = entry checkbutton = (label[:1] == '!') if checkbutton: label = label[1:] underline, label = prepstr(label) accelerator = get_accelerator(keydefs, eventname) def command(text=text, eventname=eventname): text.event_generate(eventname) if checkbutton: var = self.get_var_obj(eventname, BooleanVar) menu.add_checkbutton(label=label, underline=underline, command=command, accelerator=accelerator, variable=var) else: menu.add_command(label=label, underline=underline, command=command, accelerator=accelerator) def getvar(self, name): var = self.get_var_obj(name) if var: value = var.get() return value else: raise NameError, name def setvar(self, name, value, vartype=None): var = self.get_var_obj(name, vartype) if var: var.set(value) else: raise NameError, name def get_var_obj(self, name, vartype=None): var = self.tkinter_vars.get(name) if not var and vartype: # create a Tkinter variable object with self.text as master: self.tkinter_vars[name] = var = vartype(self.text) return var # Tk implementations of "virtual text methods" -- each platform # reusing IDLE's support code needs to define these for its GUI's # flavor of widget. # Is character at text_index in a Python string? Return 0 for # "guaranteed no", true for anything else. This info is expensive # to compute ab initio, but is probably already known by the # platform's colorizer. def is_char_in_string(self, text_index): if self.color: # Return true iff colorizer hasn't (re)gotten this far # yet, or the character is tagged as being in a string return self.text.tag_prevrange("TODO", text_index) or \ "STRING" in self.text.tag_names(text_index) else: # The colorizer is missing: assume the worst return 1 # If a selection is defined in the text widget, return (start, # end) as Tkinter text indices, otherwise return (None, None) def get_selection_indices(self): try: first = self.text.index("sel.first") last = self.text.index("sel.last") return first, last except TclError: return None, None # Return the text widget's current view of what a tab stop means # (equivalent width in spaces). def get_tabwidth(self): current = self.text['tabs'] or TK_TABWIDTH_DEFAULT return int(current) # Set the text widget's current view of what a tab stop means. def set_tabwidth(self, newtabwidth): text = self.text if self.get_tabwidth() != newtabwidth: pixels = text.tk.call("font", "measure", text["font"], "-displayof", text.master, "n" * newtabwidth) text.configure(tabs=pixels) ### begin autoindent code ### # 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 = 0 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 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: %r" % (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.set_tabwidth(self.tabwidth) def smart_backspace_event(self, event): text = self.text first, last = self.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. tabwidth = self.tabwidth have = len(chars.expandtabs(tabwidth)) assert have > 0 want = ((have - 1) // self.indentwidth) * self.indentwidth # Debug prompt is multilined.... last_line_of_prompt = sys.ps1.split('\n')[-1] ncharsdeleted = 0 while 1: if chars == last_line_of_prompt: break chars = chars[:-1] ncharsdeleted = ncharsdeleted + 1 have = len(chars.expandtabs(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.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(prefix.expandtabs(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.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 in a continuation # line; just inject an empty line at the start text.insert("insert linestart", '\n') return "break" indent = line[:i] # strip whitespace before insert point unless it's in the prompt i = 0 last_line_of_prompt = sys.ps1.split('\n')[-1] while line and line[-1] in " \t" and line != last_line_of_prompt: 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 = repr(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 %r" % (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() # 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.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] = lines[pos].expandtabs(tabwidth) self.set_region(head, tail, chars, lines) def toggle_tabs_event(self, event): if self.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.askinteger( "Indent width", "New indent width (2-16)", parent=self.text, initialvalue=self.indentwidth, minvalue=2, maxvalue=16) if new and new != self.indentwidth: self.indentwidth = new return "break" def get_region(self): text = self.text first, last = self.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 = chars.split("\n") return head, tail, chars, lines def set_region(self, head, tail, chars, lines): text = self.text newchars = "\n".join(lines) 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.askinteger( "Tab width", "Spaces per tab? (2-16)", parent=self.text, initialvalue=self.indentwidth, minvalue=2, 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 = repr(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 ### end autoindent code ### def prepstr(s): # Helper to extract the underscore from a string, e.g. # prepstr("Co_py") returns (2, "Copy"). i = s.find('_') if i >= 0: s = s[:i] + s[i+1:] return i, s keynames = { 'bracketleft': '[', 'bracketright': ']', 'slash': '/', } def get_accelerator(keydefs, eventname): keylist = keydefs.get(eventname) if not keylist: return "" s = keylist[0] s = re.sub(r"-[a-z]\b", lambda m: m.group().upper(), s) s = re.sub(r"\b\w+\b", lambda m: keynames.get(m.group(), m.group()), s) s = re.sub("Key-", "", s) s = re.sub("Cancel","Ctrl-Break",s) # dscherer@cmu.edu s = re.sub("Control-", "Ctrl-", s) s = re.sub("-", "+", s) s = re.sub("><", " ", s) s = re.sub("<", "", s) s = re.sub(">", "", s) return s def fixwordbreaks(root): # Make sure that Tk's double-click and next/previous word # operations use our definition of a word (i.e. an identifier) tk = root.tk tk.call('tcl_wordBreakAfter', 'a b', 0) # make sure word.tcl is loaded tk.call('set', 'tcl_wordchars', '[a-zA-Z0-9_]') tk.call('set', 'tcl_nonwordchars', '[^a-zA-Z0-9_]') def test(): root = Tk() fixwordbreaks(root) root.withdraw() if sys.argv[1:]: filename = sys.argv[1] else: filename = None edit = EditorWindow(root=root, filename=filename) edit.set_close_hook(root.quit) root.mainloop() root.destroy() if __name__ == '__main__': test()