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+# Copyright 2010 Le Coz Florent <louizatakk@fedoraproject.org>
+#
+# This file is part of Poezio.
+#
+# Poezio is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 3 of the License.
+#
+# Poezio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Poezio. If not, see <http://www.gnu.org/licenses/>.
+
+from message import Message
+from datetime import datetime
+import theme
+
+class TextBuffer(object):
+ """
+ This class just keep trace of messages, in a list with various
+ informations and attributes.
+ """
+ def __init__(self):
+ self.messages = [] # Message objects
+ self.pos = 0
+
+ def add_message(self, txt, time=None, nickname=None, colorized=False):
+ color = theme.COLOR_NORMAL_TEXT
+ user = None
+ time = time or datetime.now()
+ if self.pos: # avoid scrolling of one line when one line is received
+ self.pos += 1
+ self.messages.append(Message(txt, time, nickname, user, color, colorized))
+
+ def remove_line_separator(self):
+ """
+ Remove the line separator
+ """
+ if None in self.messages:
+ self.messages.remove(None)
+
+ def add_line_separator(self):
+ """
+ add a line separator at the end of messages list
+ """
+ if None not in self.messages:
+ self.messages.append(None)
+
+ def scroll_up(self, dist=14):
+ # The pos can grow a lot over the top of the number of
+ # available lines, it will be fixed on the next refresh of the
+ # screen anyway
+ self.pos += dist
+
+ def scroll_down(self, dist=14):
+ self.pos -= dist
+ if self.pos <= 0:
+ self.pos = 0
+