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from gi.repository import Gtk
class SearchBar(Gtk.SearchBar):
"SearchBar implements Gtk.SearchBar on a Gtk.TextBuffer."
BG_COLOR = "yellow"
FG_COLOR = "black"
def __init__(self, buffer):
Gtk.SearchBar.__init__(self)
self.__buffer = buffer
self.__match = None
self.__tag = buffer.create_tag("search-match",
background=self.BG_COLOR,
foreground=self.FG_COLOR)
search_entry = Gtk.SearchEntry.new()
search_entry.connect("search-changed", self.__search_changed)
search_entry.connect("next-match", self.__next_match)
search_entry.connect("previous-match", self.__prev_match)
self.set_show_close_button(True)
self.connect_entry(search_entry)
self.add(search_entry)
def __find_match(self, entry, start, forward=True):
buf = self.__buffer
text = entry.get_text()
# Remove old match.
buf.remove_tag(self.__tag,
buf.get_start_iter(),
buf.get_end_iter())
if forward:
self.__match = start.forward_search(text, 0, None)
else:
self.__match = start.backward_search(text, 0, None)
if self.__match:
mstart, mend = self.__match
buf.apply_tag(self.__tag, mstart, mend)
def __search_changed(self, entry):
self.__find_match(entry, self.__buffer.get_start_iter())
def __next_match(self, entry):
# Wrap around if no match was found previously.
if self.__match is None:
start = self.__buffer.get_start_iter()
else:
_, start = self.__match
self.__find_match(entry, start)
def __prev_match(self, entry):
# Wrap around if no match was found previously.
if self.__match is None:
start = self.__buffer.get_end_iter()
else:
start, _ = self.__match
self.__find_match(entry, start, forward=False)
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