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