from Tkinter import *import SearchEnginefrom SearchDialogBase import SearchDialogBase def replace(text):    root = text._root()    engine = SearchEngine.get(root)    if not hasattr(engine, "_replacedialog"):        engine._replacedialog = ReplaceDialog(root, engine)    dialog = engine._replacedialog    dialog.open(text) class ReplaceDialog(SearchDialogBase):     title = "Replace Dialog"    icon = "Replace"     def __init__(self, root, engine):        SearchDialogBase.__init__(self, root, engine)        self.replvar = StringVar(root)     def open(self, text):        SearchDialogBase.open(self, text)        try:            first = text.index("sel.first")        except TclError:            first = None        try:            last = text.index("sel.last")        except TclError:            last = None        first = first or text.index("insert")        last = last or first        self.show_hit(first, last)        self.ok = 1     def create_entries(self):        SearchDialogBase.create_entries(self)        self.replent = self.make_entry("Replace with:", self.replvar)     def create_command_buttons(self):        SearchDialogBase.create_command_buttons(self)        self.make_button("Find", self.find_it)        self.make_button("Replace", self.replace_it)        self.make_button("Replace+Find", self.default_command, 1)        self.make_button("Replace All", self.replace_all)     def find_it(self, event=None):        self.do_find(0)     def replace_it(self, event=None):        if self.do_find(self.ok):            self.do_replace()     def default_command(self, event=None):        if self.do_find(self.ok):            self.do_replace()            self.do_find(0)     def replace_all(self, event=None):        prog = self.engine.getprog()        if not prog:            return        repl = self.replvar.get()        text = self.text        res = self.engine.search_text(text, prog)        if not res:            text.bell()            return        text.tag_remove("sel", "1.0", "end")        text.tag_remove("hit", "1.0", "end")        line = res[0]        col = res[1].start()        if self.engine.iswrap():            line = 1            col = 0        ok = 1        first = last = None        # XXX ought to replace circular instead of top-to-bottom when wrapping        text.undo_block_start()        while 1:            res = self.engine.search_forward(text, prog, line, col, 0, ok)            if not res:                break            line, m = res            chars = text.get("%d.0" % line, "%d.0" % (line+1))            orig = m.group()            new = m.expand(repl)            i, j = m.span()            first = "%d.%d" % (line, i)            last = "%d.%d" % (line, j)            if new == orig:                text.mark_set("insert", last)            else:                text.mark_set("insert", first)                if first != last:                    text.delete(first, last)                if new:                    text.insert(first, new)            col = i + len(new)            ok = 0        text.undo_block_stop()        if first and last:            self.show_hit(first, last)        self.close()     def do_find(self, ok=0):        if not self.engine.getprog():            return False        text = self.text        res = self.engine.search_text(text, None, ok)        if not res:            text.bell()            return False        line, m = res        i, j = m.span()        first = "%d.%d" % (line, i)        last = "%d.%d" % (line, j)        self.show_hit(first, last)        self.ok = 1        return True     def do_replace(self):        prog = self.engine.getprog()        if not prog:            return False        text = self.text        try:            first = pos = text.index("sel.first")            last = text.index("sel.last")        except TclError:            pos = None        if not pos:            first = last = pos = text.index("insert")        line, col = SearchEngine.get_line_col(pos)        chars = text.get("%d.0" % line, "%d.0" % (line+1))        m = prog.match(chars, col)        if not prog:            return False        new = m.expand(self.replvar.get())        text.mark_set("insert", first)        text.undo_block_start()        if m.group():            text.delete(first, last)        if new:            text.insert(first, new)        text.undo_block_stop()        self.show_hit(first, text.index("insert"))        self.ok = 0        return True     def show_hit(self, first, last):        text = self.text        text.mark_set("insert", first)        text.tag_remove("sel", "1.0", "end")        text.tag_add("sel", first, last)        text.tag_remove("hit", "1.0", "end")        if first == last:            text.tag_add("hit", first)        else:            text.tag_add("hit", first, last)        text.see("insert")        text.update_idletasks()     def close(self, event=None):        SearchDialogBase.close(self, event)        self.text.tag_remove("hit", "1.0", "end")