naja/widgets/text.py

   1 import pygame
   2
   3 from naja.constants import FONT, FONT_SIZE, EIGHT_BIT_SCALE, PALETTE
   4 from naja.resources import resources
   5 from naja.resources.mutators import EIGHT_BIT, blender
   6 from naja.utils import convert_colour
   7 from naja.widgets.base import Widget
   8
   9
  10 MARKUP_MAP = {
  11     'NORTH': (1, 'glyphs/arrow_up.png', None),
  12     'SOUTH': (1, 'glyphs/arrow_down.png', None),
  13     'EAST': (1, 'glyphs/arrow_right.png', None),
  14     'WEST': (1, 'glyphs/arrow_left.png', None),
  15     'HEALTH': (1, 'glyphs/health.png', PALETTE.DARK_RED),
  16     'WINTOKEN': (1, 'glyphs/win.png', PALETTE.DARK_OLIVE),
  17     'KEY': (1, 'glyphs/key.png', None),
  18     'MSB': (1, 'glyphs/msb.png', None),
  19     'REDKEY': (1, 'glyphs/key.png', PALETTE.ORANGE),
  20     'GREENKEY': (1, 'glyphs/key.png', PALETTE.GREEN),
  21     'BLUEKEY': (1, 'glyphs/key.png', PALETTE.BLUE),
  22 }
  23
  24
  25 class TextWidget(Widget):
  26
  27     def __init__(self, pos, text, size=None, fontname=None, fontsize=None,
  28                  colour=None):
  29         super(TextWidget, self).__init__(pos, size)
  30
  31         self.text = text
  32         self.fontname = fontname or FONT
  33         self.fontsize = (fontsize or FONT_SIZE) // EIGHT_BIT_SCALE
  34         self.colour = convert_colour(colour or PALETTE.BLACK)
  35
  36     def render_line(self, text):
  37         text_surf = self.font.render(text, True, self.colour)
  38         text_rect = text_surf.get_rect()
  39         return pygame.transform.scale(
  40             text_surf, (text_rect.width * EIGHT_BIT_SCALE,
  41                         text_rect.height * EIGHT_BIT_SCALE))
  42
  43     def prepare(self):
  44         self.font = resources.get_font(self.fontname, self.fontsize)
  45         self.surface = self.render_line(self.text)
  46         self.size = self.surface.get_rect().size
  47
  48     def draw(self, surface):
  49         surface.blit(self.surface, self.pos)
  50
  51
  52 class TextBoxWidget(TextWidget):
  53     def __init__(self, *args, **kwargs):
  54         self.padding = kwargs.pop('padding', 5)
  55         self.border = kwargs.pop('border', 2)
  56         self.bg_colour = convert_colour(kwargs.pop('bg_colour',
  57                                                    PALETTE.LIGHT_VIOLET))
  58         self.border_colour = convert_colour(kwargs.pop('border_colour',
  59                                                        PALETTE.BLACK))
  60         self.box_width = kwargs.pop('box_width', 0)
  61
  62         super(TextBoxWidget, self).__init__(*args, **kwargs)
  63
  64     def lines(self, image_map):
  65         if self.box_width != 0:
  66             return self._wrapped_lines(image_map)
  67         else:
  68             return self.text.splitlines()
  69
  70     def _wrapped_lines(self, image_map):
  71         def words_fit(words):
  72             words_line = ' '.join(words)
  73             width = self.font.size(words_line)[0]
  74             if width < self.box_width:
  75                 return True
  76             elif len(words) == 1:
  77                 Exception("Word %r too long for box." % (words[0],))
  78             return False
  79
  80         line_count = 0
  81         for line in self.text.splitlines():
  82             current_words = []
  83             remaining_words = line.split()
  84             while remaining_words:
  85                 word = remaining_words[0]
  86                 suffix = ''
  87                 if word[-1] in '.,':
  88                     suffix = word[-1]
  89                     word = word[:-1]
  90                 markup_data = MARKUP_MAP.get(word, None)
  91                 if markup_data is not None:
  92                     word = ' ' * markup_data[0]
  93                 word += suffix
  94                 current_words.append(word)
  95                 if words_fit(current_words):
  96                     if markup_data is not None:
  97                         size = self.font.size(
  98                             ' '.join(current_words[:-1] + ['']))
  99                         pos = (size[0] * EIGHT_BIT_SCALE,
 100                                size[1] * line_count * EIGHT_BIT_SCALE)
 101                         pos = (pos[0] + self.padding, pos[1] + self.padding)
 102                         colour = self.colour
 103                         if markup_data[2] is not None:
 104                             colour = markup_data[2]
 105                         image_map[pos] = resources.get_image(
 106                             markup_data[1],
 107                             transforms=(EIGHT_BIT, blender(colour)))
 108                     remaining_words.pop(0)
 109                 else:
 110                     line_count += 1
 111                     yield ' '.join(current_words[:-1])
 112                     current_words = []
 113             if current_words and words_fit(current_words):
 114                 yield ' '.join(current_words)
 115
 116     def prepare(self):
 117         self.font = resources.get_font(self.fontname, self.fontsize)
 118         image_map = {}
 119         rendered_lines = []
 120         width, height = self.padding * 2, self.padding * 2
 121         for line in self.lines(image_map):
 122             line_surface = self.render_line(line)
 123             line_rect = line_surface.get_rect()
 124             rendered_lines.append(line_surface)
 125             width = max(width, line_rect.width + self.padding * 2)
 126             height += line_rect.height
 127
 128         self.surface = pygame.surface.Surface((width, height),
 129                                               pygame.locals.SRCALPHA)
 130         self.surface.fill(self.bg_colour)
 131         self.size = self.surface.get_rect().size
 132
 133         x, y = self.padding, self.padding
 134         for line_surface in rendered_lines:
 135             self.surface.blit(line_surface, (x, y))
 136             y += line_surface.get_rect().height
 137         for pos, img in image_map.items():
 138             self.surface.blit(img, pos)
 139
 140     def draw(self, surface):
 141         surface.blit(self.surface, self.rect)