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