naja/widgets/text.py

   1 import pygame
   2 import pygame.locals as pgl
   3
   4 from naja.constants import FONT, FONT_SIZE, EIGHT_BIT_SCALE, PALETTE, KEYS
   5 from naja.resources import resources
   6 from naja.resources.mutators import EIGHT_BIT, R180, blender
   7 from naja.utils import convert_colour
   8 from naja.widgets.base import Widget
   9
  10
  11 MARKUP_MAP = {
  12     'NORTH': ('glyphs/arrow_up.png', None),
  13     'SOUTH': ('glyphs/arrow_down.png', None),
  14     'EAST': ('glyphs/arrow_right.png', None),
  15     'WEST': ('glyphs/arrow_left.png', None),
  16     'HEALTH': ('glyphs/health.png', PALETTE.DARK_RED),
  17     'WINTOKEN': ('glyphs/win.png', PALETTE.DARK_OLIVE),
  18     'KEY': ('glyphs/key.png', None),
  19     'MSB': ('glyphs/msb.png', None),
  20     'RED': ('glyphs/key.png', PALETTE.ORANGE),
  21     'GREEN': ('glyphs/key.png', PALETTE.GREEN),
  22     'BLUE': ('glyphs/key.png', PALETTE.BLUE),
  23     'CLOCKWISE': ('glyphs/clockwise.png', None),
  24     'ANTICLOCKWISE': ('glyphs/anticlockwise.png', None),
  25     'SHIFT_LEFT': ('glyphs/shift_left.png', None),
  26     'SHIFT_RIGHT': ('glyphs/shift_right.png', None),
  27     'COUNTDOWN': ('glyphs/countdown_4.png', PALETTE.DARK_VIOLET),
  28
  29     'HEALTH_NOCOLOUR': ('glyphs/health.png', None),
  30     'WINTOKEN_NOCOLOUR': ('glyphs/win.png', None),
  31 }
  32
  33
  34 class Glyph(object):
  35     def __init__(self, markup_text, glyph_keys, suffix=''):
  36         self.markup_text = markup_text
  37         self.glyph_keys = glyph_keys
  38         self.text = ' ' * len(self.glyph_keys) + suffix
  39
  40
  41 class TextWidget(Widget):
  42
  43     VIEW_PORT_DY = 50
  44
  45     def __init__(self, pos, text, fontname=None, fontsize=None,
  46                  colour=None, unselectable_colour=None, view_port=None,
  47                  centre=False, border=0, border_colour=PALETTE.GREY,
  48                  padding=2):
  49         super(TextWidget, self).__init__(pos)
  50
  51         self.text = text
  52         self.fontname = fontname or FONT
  53         self.fontsize = (fontsize or FONT_SIZE) // EIGHT_BIT_SCALE
  54         self.colour = convert_colour(colour or PALETTE.BLACK)
  55         if unselectable_colour is not None:
  56             unselectable_colour = convert_colour(unselectable_colour)
  57         self.unselectable_colour = unselectable_colour
  58         self.view_port = (
  59             pygame.Rect((0, 0), view_port) if view_port is not None else None)
  60         self.centre = centre
  61         self.centre_pos = pos
  62         self.border = border
  63         self.border_colour = convert_colour(border_colour)
  64         self.padding = padding
  65
  66     def render_line(self, text):
  67         colour = self.colour
  68         if not self.is_selectable() and self.unselectable_colour is not None:
  69             colour = self.unselectable_colour
  70         text_surf = self.font.render(text, True, colour)
  71         text_rect = text_surf.get_rect()
  72         return pygame.transform.scale(
  73             text_surf, (text_rect.width * EIGHT_BIT_SCALE,
  74                         text_rect.height * EIGHT_BIT_SCALE))
  75
  76     def render_border(self, surface):
  77         if not self.border or not self.border_colour:
  78             return
  79         rect = surface.get_rect()
  80         rect = rect.inflate(- self.border / 2, - self.border / 2)
  81         pygame.draw.rect(surface, self.border_colour, rect, self.border)
  82
  83     def update_size(self):
  84         if self.view_port is not None:
  85             self.size = self.view_port.size
  86         else:
  87             self.size = self.surface.get_rect().size
  88         if self.centre:
  89             self.pos = (self.centre_pos[0] - self.size[0] // 2,
  90                         self.centre_pos[1])
  91
  92     def prepare(self):
  93         self.font = resources.get_font(self.fontname, self.fontsize)
  94         self.surface = self.render_line(self.text)
  95         self.render_border(self.surface)
  96         self.update_size()
  97
  98     def handle_event(self, ev):
  99         if self.view_port is None:
 100             return super(TextWidget, self).handle_event(ev)
 101         if ev.type == pgl.KEYDOWN:
 102             if ev.key in KEYS.DOWN:
 103                 self.view_port.move_ip(0, self.VIEW_PORT_DY)
 104                 if self.view_port.bottom > self.surface.get_rect().bottom:
 105                     self.view_port.bottom = self.surface.get_rect().bottom
 106                 return True
 107             elif ev.key in KEYS.UP:
 108                 self.view_port.move_ip(0, -self.VIEW_PORT_DY)
 109                 if self.view_port.top < 0:
 110                     self.view_port.top = 0
 111                 return True
 112         return super(TextWidget, self).handle_event(ev)
 113
 114     def draw(self, surface):
 115         if self.view_port is None:
 116             rect = self.rect
 117             area = None
 118         else:
 119             rect = self.pos
 120             area = self.view_port
 121         surface.blit(self.surface, rect, area)
 122         if self.view_port is not None:
 123             self.draw_arrows(surface)
 124
 125     def draw_arrows(self, surface):
 126         if self.view_port.top > 0:
 127             up = resources.get_image('bits', 'arrow_on.png',
 128                                      transforms=(EIGHT_BIT,))
 129             icon_size = up.get_rect().height
 130             pos = (self.pos[0] + self.view_port.width - icon_size, self.pos[1])
 131             surface.blit(up, pos)
 132         if self.view_port.bottom < self.surface.get_rect().bottom:
 133             down = resources.get_image('bits', 'arrow_on.png',
 134                                        transforms=(R180, EIGHT_BIT))
 135             icon_size = down.get_rect().height
 136             pos = (self.pos[0] + self.view_port.width - icon_size,
 137                    self.pos[1] + self.view_port.height - icon_size)
 138             surface.blit(down, pos)
 139
 140
 141 class TextBoxWidget(TextWidget):
 142     def __init__(self, *args, **kwargs):
 143         self.bg_colour = convert_colour(kwargs.pop('bg_colour',
 144                                                    PALETTE.LIGHT_VIOLET))
 145         self.box_width = kwargs.pop('box_width', 0)
 146         self.full_width = kwargs.pop('full_width', True)
 147         kwargs.setdefault('padding', 4)
 148
 149         super(TextBoxWidget, self).__init__(*args, **kwargs)
 150
 151     def lines(self, image_map):
 152         if self.box_width != 0:
 153             return self._wrapped_lines(image_map)
 154         else:
 155             return self.text.splitlines()
 156
 157     def _prepare_glyph(self, image_map, glyph, current_words, lines):
 158         size = self.font.size(' '.join(current_words[:-1] + ['']))
 159         x = size[0] * EIGHT_BIT_SCALE + self.padding
 160         y = size[1] * lines * EIGHT_BIT_SCALE + self.padding
 161         for glyph_key in glyph.glyph_keys:
 162             image_name, colour = MARKUP_MAP[glyph_key]
 163             if colour is None:
 164                 colour = self.colour
 165             image = resources.get_image(
 166                 image_name, transforms=(EIGHT_BIT, blender(colour)))
 167             image_map[(x, y)] = image
 168             x += image.get_width()
 169
 170     def _check_markup(self, word):
 171         suffix = ''
 172         if word[-1] in '.,':
 173             suffix = word[-1]
 174             word = word[:-1]
 175
 176         if not word:
 177             return None
 178         if word[0] == '{' and word[-1] == '}':
 179             subwords = word[1:-1].split(',')
 180             if all(subword in MARKUP_MAP for subword in subwords):
 181                 return Glyph(word + suffix, subwords, suffix)
 182
 183         return None
 184
 185     def _wrapped_lines(self, image_map):
 186         def words_fit(words):
 187             words_line = ' '.join(words)
 188             width = self.font.size(words_line)[0] * EIGHT_BIT_SCALE
 189             if width < self.box_width:
 190                 return True
 191             elif len(words) == 1:
 192                 Exception("Word %r too long for box." % (words[0],))
 193             return False
 194
 195         line_count = 0
 196         for line in self.text.splitlines():
 197             line = line.strip()
 198             if not line:
 199                 line_count += 1
 200                 yield line
 201                 continue
 202             current_words = []
 203             remaining_words = line.split()
 204             while remaining_words:
 205                 word = remaining_words.pop(0)
 206                 glyph = self._check_markup(word)
 207                 if glyph is not None:
 208                     word = glyph.text
 209                 current_words.append(word)
 210                 if words_fit(current_words):
 211                     if glyph is not None:
 212                         self._prepare_glyph(
 213                             image_map, glyph, current_words, line_count)
 214                 else:
 215                     line_count += 1
 216                     yield ' '.join(current_words[:-1])
 217                     current_words = []
 218                     if glyph is not None:
 219                         word = glyph.markup_text
 220                     remaining_words.insert(0, word)
 221             if current_words and words_fit(current_words):
 222                 line_count += 1
 223                 yield ' '.join(current_words)
 224
 225     def prepare(self):
 226         self.font = resources.get_font(self.fontname, self.fontsize)
 227         image_map = {}
 228         rendered_lines = []
 229         width, height = self.padding * 2, self.padding * 2
 230         for line in self.lines(image_map):
 231             line_surface = self.render_line(line)
 232             line_rect = line_surface.get_rect()
 233             rendered_lines.append(line_surface)
 234             width = max(width, line_rect.width + self.padding * 2)
 235             height += line_rect.height
 236
 237         if self.full_width:
 238             width = max(width, self.box_width)
 239
 240         self.surface = pygame.surface.Surface((width, height),
 241                                               pygame.locals.SRCALPHA)
 242         self.surface.fill(self.bg_colour)
 243         self.update_size()
 244
 245         x, y = self.padding, self.padding
 246         for line_surface in rendered_lines:
 247             if self.centre:
 248                 x = (width - line_surface.get_rect().width) / 2
 249                 x += self.padding
 250             self.surface.blit(line_surface, (x, y))
 251             y += line_surface.get_rect().height
 252         for pos, img in image_map.items():
 253             self.surface.blit(img, pos)
 254
 255         self.render_border(self.surface)