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': ('glyphs/arrow_up.png', None),
  12     'SOUTH': ('glyphs/arrow_down.png', None),
  13     'EAST': ('glyphs/arrow_right.png', None),
  14     'WEST': ('glyphs/arrow_left.png', None),
  15     'HEALTH': ('glyphs/health.png', PALETTE.DARK_RED),
  16     'WINTOKEN': ('glyphs/win.png', PALETTE.DARK_OLIVE),
  17     'KEY': ('glyphs/key.png', None),
  18     'MSB': ('glyphs/msb.png', None),
  19     'RED': ('glyphs/key.png', PALETTE.ORANGE),
  20     'GREEN': ('glyphs/key.png', PALETTE.GREEN),
  21     'BLUE': ('glyphs/key.png', PALETTE.BLUE),
  22     'CLOCKWISE': ('glyphs/clockwise.png', None),
  23     'ANTICLOCKWISE': ('glyphs/anticlockwise.png', None),
  24
  25     'HEALTH_NOCOLOUR': ('glyphs/health.png', None),
  26     'WINTOKEN_NOCOLOUR': ('glyphs/win.png', None),
  27 }
  28
  29
  30 class Glyph(object):
  31     def __init__(self, markup_text, glyph_keys, suffix=''):
  32         self.markup_text = markup_text
  33         self.glyph_keys = glyph_keys
  34         self.text = ' ' * len(self.glyph_keys) + suffix
  35
  36
  37 class TextWidget(Widget):
  38
  39     def __init__(self, pos, text, size=None, fontname=None, fontsize=None,
  40                  colour=None, unselectable_colour=None):
  41         super(TextWidget, self).__init__(pos, size)
  42
  43         self.text = text
  44         self.fontname = fontname or FONT
  45         self.fontsize = (fontsize or FONT_SIZE) // EIGHT_BIT_SCALE
  46         self.colour = convert_colour(colour or PALETTE.BLACK)
  47         if unselectable_colour is not None:
  48             unselectable_colour = convert_colour(unselectable_colour)
  49         self.unselectable_colour = unselectable_colour
  50
  51     def render_line(self, text):
  52         colour = self.colour
  53         if not self.is_selectable() and self.unselectable_colour is not None:
  54             colour = self.unselectable_colour
  55         text_surf = self.font.render(text, True, colour)
  56         text_rect = text_surf.get_rect()
  57         return pygame.transform.scale(
  58             text_surf, (text_rect.width * EIGHT_BIT_SCALE,
  59                         text_rect.height * EIGHT_BIT_SCALE))
  60
  61     def prepare(self):
  62         self.font = resources.get_font(self.fontname, self.fontsize)
  63         self.surface = self.render_line(self.text)
  64         self.size = self.surface.get_rect().size
  65
  66     def draw(self, surface):
  67         surface.blit(self.surface, self.pos)
  68
  69
  70 class TextBoxWidget(TextWidget):
  71     def __init__(self, *args, **kwargs):
  72         self.padding = kwargs.pop('padding', 4)
  73         self.border = kwargs.pop('border', 2)
  74         self.bg_colour = convert_colour(kwargs.pop('bg_colour',
  75                                                    PALETTE.LIGHT_VIOLET))
  76         self.border_colour = convert_colour(kwargs.pop('border_colour',
  77                                                        PALETTE.BLACK))
  78         self.box_width = kwargs.pop('box_width', 0)
  79
  80         super(TextBoxWidget, self).__init__(*args, **kwargs)
  81
  82     def lines(self, image_map):
  83         if self.box_width != 0:
  84             return self._wrapped_lines(image_map)
  85         else:
  86             return self.text.splitlines()
  87
  88     def _prepare_glyph(self, image_map, glyph, current_words, lines):
  89         size = self.font.size(' '.join(current_words[:-1] + ['']))
  90         x = size[0] * EIGHT_BIT_SCALE + self.padding
  91         y = size[1] * lines * EIGHT_BIT_SCALE + self.padding
  92         for glyph_key in glyph.glyph_keys:
  93             image_name, colour = MARKUP_MAP[glyph_key]
  94             if colour is None:
  95                 colour = self.colour
  96             image = resources.get_image(
  97                 image_name, transforms=(EIGHT_BIT, blender(colour)))
  98             image_map[(x, y)] = image
  99             x += image.get_width()
 100
 101     def _check_markup(self, word):
 102         suffix = ''
 103         if word[-1] in '.,':
 104             suffix = word[-1]
 105             word = word[:-1]
 106
 107         if word[0] == '{' and word[-1] == '}':
 108             subwords = word[1:-1].split(',')
 109             if all(subword in MARKUP_MAP for subword in subwords):
 110                 return Glyph(word + suffix, subwords, suffix)
 111
 112         return None
 113
 114     def _wrapped_lines(self, image_map):
 115         def words_fit(words):
 116             words_line = ' '.join(words)
 117             width = self.font.size(words_line)[0]
 118             if width < self.box_width:
 119                 return True
 120             elif len(words) == 1:
 121                 Exception("Word %r too long for box." % (words[0],))
 122             return False
 123
 124         line_count = 0
 125         for line in self.text.splitlines():
 126             current_words = []
 127             remaining_words = line.split()
 128             while remaining_words:
 129                 word = remaining_words.pop(0)
 130                 glyph = self._check_markup(word)
 131                 if glyph is not None:
 132                     word = glyph.text
 133                 current_words.append(word)
 134                 if words_fit(current_words):
 135                     if glyph is not None:
 136                         self._prepare_glyph(
 137                             image_map, glyph, current_words, line_count)
 138                 else:
 139                     line_count += 1
 140                     yield ' '.join(current_words[:-1])
 141                     current_words = []
 142                     if glyph is not None:
 143                         word = glyph.markup_text
 144                     remaining_words.insert(0, word)
 145             if current_words and words_fit(current_words):
 146                 yield ' '.join(current_words)
 147
 148     def prepare(self):
 149         self.font = resources.get_font(self.fontname, self.fontsize)
 150         image_map = {}
 151         rendered_lines = []
 152         width, height = self.padding * 2, self.padding * 2
 153         for line in self.lines(image_map):
 154             line_surface = self.render_line(line)
 155             line_rect = line_surface.get_rect()
 156             rendered_lines.append(line_surface)
 157             width = max(width, line_rect.width + self.padding * 2)
 158             height += line_rect.height
 159
 160         self.surface = pygame.surface.Surface((width, height),
 161                                               pygame.locals.SRCALPHA)
 162         self.surface.fill(self.bg_colour)
 163         self.size = self.surface.get_rect().size
 164
 165         x, y = self.padding, self.padding
 166         for line_surface in rendered_lines:
 167             self.surface.blit(line_surface, (x, y))
 168             y += line_surface.get_rect().height
 169         for pos, img in image_map.items():
 170             self.surface.blit(img, pos)
 171
 172     def draw(self, surface):
 173         surface.blit(self.surface, self.rect)