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