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243 lines
7.3 KiB
243 lines
7.3 KiB
6 years ago
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"""Replace dialog for IDLE. Inherits SearchDialogBase for GUI.
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Uses idlelib.SearchEngine for search capability.
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Defines various replace related functions like replace, replace all,
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replace+find.
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"""
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import re
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from tkinter import StringVar, TclError
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from idlelib.searchbase import SearchDialogBase
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from idlelib import searchengine
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def replace(text):
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"""Returns a singleton ReplaceDialog instance.The single dialog
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saves user entries and preferences across instances."""
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root = text._root()
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engine = searchengine.get(root)
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if not hasattr(engine, "_replacedialog"):
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engine._replacedialog = ReplaceDialog(root, engine)
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dialog = engine._replacedialog
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dialog.open(text)
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class ReplaceDialog(SearchDialogBase):
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title = "Replace Dialog"
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icon = "Replace"
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def __init__(self, root, engine):
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SearchDialogBase.__init__(self, root, engine)
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self.replvar = StringVar(root)
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def open(self, text):
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"""Display the replace dialog"""
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SearchDialogBase.open(self, text)
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try:
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first = text.index("sel.first")
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except TclError:
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first = None
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try:
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last = text.index("sel.last")
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except TclError:
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last = None
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first = first or text.index("insert")
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last = last or first
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self.show_hit(first, last)
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self.ok = 1
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def create_entries(self):
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"""Create label and text entry widgets"""
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SearchDialogBase.create_entries(self)
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self.replent = self.make_entry("Replace with:", self.replvar)[0]
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def create_command_buttons(self):
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SearchDialogBase.create_command_buttons(self)
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self.make_button("Find", self.find_it)
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self.make_button("Replace", self.replace_it)
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self.make_button("Replace+Find", self.default_command, 1)
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self.make_button("Replace All", self.replace_all)
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def find_it(self, event=None):
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self.do_find(0)
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def replace_it(self, event=None):
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if self.do_find(self.ok):
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self.do_replace()
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def default_command(self, event=None):
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"Replace and find next."
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if self.do_find(self.ok):
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if self.do_replace(): # Only find next match if replace succeeded.
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# A bad re can cause it to fail.
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self.do_find(0)
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def _replace_expand(self, m, repl):
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""" Helper function for expanding a regular expression
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in the replace field, if needed. """
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if self.engine.isre():
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try:
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new = m.expand(repl)
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except re.error:
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self.engine.report_error(repl, 'Invalid Replace Expression')
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new = None
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else:
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new = repl
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return new
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def replace_all(self, event=None):
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"""Replace all instances of patvar with replvar in text"""
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prog = self.engine.getprog()
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if not prog:
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return
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repl = self.replvar.get()
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text = self.text
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res = self.engine.search_text(text, prog)
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if not res:
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self.bell()
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return
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text.tag_remove("sel", "1.0", "end")
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text.tag_remove("hit", "1.0", "end")
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line = res[0]
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col = res[1].start()
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if self.engine.iswrap():
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line = 1
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col = 0
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ok = 1
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first = last = None
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# XXX ought to replace circular instead of top-to-bottom when wrapping
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text.undo_block_start()
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while 1:
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res = self.engine.search_forward(text, prog, line, col, 0, ok)
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if not res:
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break
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line, m = res
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chars = text.get("%d.0" % line, "%d.0" % (line+1))
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orig = m.group()
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new = self._replace_expand(m, repl)
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if new is None:
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break
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i, j = m.span()
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first = "%d.%d" % (line, i)
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last = "%d.%d" % (line, j)
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if new == orig:
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text.mark_set("insert", last)
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else:
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text.mark_set("insert", first)
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if first != last:
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text.delete(first, last)
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if new:
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text.insert(first, new)
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col = i + len(new)
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ok = 0
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text.undo_block_stop()
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if first and last:
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self.show_hit(first, last)
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self.close()
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def do_find(self, ok=0):
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if not self.engine.getprog():
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return False
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text = self.text
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res = self.engine.search_text(text, None, ok)
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if not res:
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self.bell()
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return False
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line, m = res
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i, j = m.span()
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first = "%d.%d" % (line, i)
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last = "%d.%d" % (line, j)
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self.show_hit(first, last)
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self.ok = 1
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return True
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def do_replace(self):
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prog = self.engine.getprog()
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if not prog:
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return False
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text = self.text
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try:
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first = pos = text.index("sel.first")
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last = text.index("sel.last")
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except TclError:
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pos = None
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if not pos:
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first = last = pos = text.index("insert")
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line, col = searchengine.get_line_col(pos)
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chars = text.get("%d.0" % line, "%d.0" % (line+1))
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m = prog.match(chars, col)
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if not prog:
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return False
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new = self._replace_expand(m, self.replvar.get())
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if new is None:
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return False
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text.mark_set("insert", first)
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text.undo_block_start()
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if m.group():
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text.delete(first, last)
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if new:
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text.insert(first, new)
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text.undo_block_stop()
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self.show_hit(first, text.index("insert"))
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self.ok = 0
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return True
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def show_hit(self, first, last):
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"""Highlight text from 'first' to 'last'.
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'first', 'last' - Text indices"""
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text = self.text
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text.mark_set("insert", first)
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text.tag_remove("sel", "1.0", "end")
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text.tag_add("sel", first, last)
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text.tag_remove("hit", "1.0", "end")
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if first == last:
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text.tag_add("hit", first)
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else:
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text.tag_add("hit", first, last)
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text.see("insert")
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text.update_idletasks()
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def close(self, event=None):
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SearchDialogBase.close(self, event)
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self.text.tag_remove("hit", "1.0", "end")
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def _replace_dialog(parent): # htest #
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from tkinter import Toplevel, Text, END, SEL
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from tkinter.ttk import Button
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box = Toplevel(parent)
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box.title("Test ReplaceDialog")
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x, y = map(int, parent.geometry().split('+')[1:])
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box.geometry("+%d+%d" % (x, y + 175))
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# mock undo delegator methods
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def undo_block_start():
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pass
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def undo_block_stop():
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pass
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text = Text(box, inactiveselectbackground='gray')
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text.undo_block_start = undo_block_start
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text.undo_block_stop = undo_block_stop
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text.pack()
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text.insert("insert","This is a sample sTring\nPlus MORE.")
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text.focus_set()
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def show_replace():
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text.tag_add(SEL, "1.0", END)
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replace(text)
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text.tag_remove(SEL, "1.0", END)
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button = Button(box, text="Replace", command=show_replace)
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button.pack()
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if __name__ == '__main__':
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from unittest import main
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main('idlelib.idle_test.test_replace', verbosity=2, exit=False)
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from idlelib.idle_test.htest import run
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run(_replace_dialog)
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