#############################################################################
##           This file is part of the Ostendo Resource Manager.            ##
##-------------------------------------------------------------------------##
## Copyright 2007-2008 Bryce Schroeder                                     ##
## bryce.schroeder@gmail.com                                               ##
## http://www.ferazelhosting.net/~bryce/                                   ##
##-------------------------------------------------------------------------##
##  This program 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, either version 3 of the License, or      ##
##  (at your option) any later version.                                    ##
##  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  ##
#############################################################################

from .standard_interpreters import Resource, R
import pygame, time
from pygame.locals import *
class Scroller:
    def __init__(self, text):
            self.text = text
            self.g = text.g
    def show(self):
        """Show the text of the scroller. Takes over the display."""
        finished = False
        text=self.text
        font=text['font'].pygame_font(text['font_size'])
        if text['music']: text['music'].play()
        
        lines=str(text).split('\n')
        rendered_lines = []
        i = 0
        for line in lines:
            surf = font.render(line, True, text['fg_color'], text['bg_color'])
            surf.set_alpha(1 + 254*(i < text['inital_lines']))
            rendered_lines.append(surf)
            i += 1
        screen_height = self.g.screen.get_height()
        fontheight = font.get_height()
        frame = 0
        offset = 0
        last = None
        while not finished and self.g.unfinished:
            if text['bg_image']:
                 text['bg_image'].blit(self.g.screen, 0,0)
            elif text['bg_color']: self.g.screen.fill(text['bg_color'])
            py = offset
            finished = True
            first = True
            for line in rendered_lines:
                if py > -fontheight  and py + text['v_bottom'] < screen_height - text['v_top']: 
                    self.g.screen.blit(line, (32,py+text['v_bottom']))
                    finished = False
                    if first and frame > text['start_delay']:
                        line.set_alpha(line.get_alpha()/2 + 1)
                        first = False
                    last = line
                py += fontheight
            
            if last: last.set_alpha(last.get_alpha()*2)
            frame += 1
            
            
            for evt in pygame.event.get():
                if evt.type is QUIT:
                    print "Goodbye."
                    self.g.unfinished = False
                elif evt.type is MOUSEBUTTONUP or evt.type is KEYDOWN:
                    finished = True
            time.sleep(0.05)
            if frame > text['start_delay']:
                offset -= 1

            pygame.display.flip()
            


        if text['music']: text['music'].fadeout(100)

class Text(Resource):
    MANDATORY = ['text']
    #OPTIONAL = ['meta']
    def init(self):
        self.meta = {}
        if self.parts.has_key('meta'):
            self.meta = self.process_meta(self.parts['meta'])
    def __str__(self):
        return self.parts['text']
    def __getitem__(self, key):
        try:
            return self.meta[key]
        except KeyError:
            return None
    def scroller(self):
        return Scroller(self)