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import urwid
from . import signals
class Highlight(urwid.AttrMap):
def __init__(self, t):
urwid.AttrMap.__init__(
self,
urwid.Text(t.text),
"focusfield",
)
self.backup = t
class Searchable(urwid.ListBox):
def __init__(self, state, contents):
self.walker = urwid.SimpleFocusListWalker(contents)
urwid.ListBox.__init__(self, self.walker)
self.state = state
self.search_offset = 0
self.current_highlight = None
self.search_term = None
def keypress(self, size, key):
if key == "/":
signals.status_prompt.send(
prompt = "Search for",
text = "",
callback = self.set_search
)
elif key == "n":
self.find_next(False)
elif key == "N":
self.find_next(True)
elif key == "g":
self.set_focus(0)
self.walker._modified()
elif key == "G":
self.set_focus(len(self.walker) - 1)
self.walker._modified()
else:
return super(self.__class__, self).keypress(size, key)
def set_search(self, text):
self.state.last_search = text
self.search_term = text or None
self.find_next(False)
def set_highlight(self, offset):
if self.current_highlight is not None:
old = self.body[self.current_highlight]
self.body[self.current_highlight] = old.backup
if offset is None:
self.current_highlight = None
else:
self.body[offset] = Highlight(self.body[offset])
self.current_highlight = offset
def get_text(self, w):
if isinstance(w, urwid.Text):
return w.text
elif isinstance(w, Highlight):
return w.backup.text
else:
return None
def find_next(self, backwards):
if not self.search_term:
if self.state.last_search:
self.search_term = self.state.last_search
else:
self.set_highlight(None)
return
# Start search at focus + 1
if backwards:
rng = xrange(len(self.body) - 1, -1, -1)
else:
rng = xrange(1, len(self.body) + 1)
for i in rng:
off = (self.focus_position + i) % len(self.body)
w = self.body[off]
txt = self.get_text(w)
if txt and self.search_term in txt:
self.set_highlight(off)
self.set_focus(off, coming_from="above")
self.body._modified()
return
else:
self.set_highlight(None)
signals.status_message.send(message="Search not found.", expire=1)
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