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