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Rough emoji support in text markup

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This commit is contained in:
Kevin Lange 2017-01-14 15:58:37 +09:00
parent 5f7c5fc58f
commit 10b421276a
1 changed files with 32 additions and 1 deletions
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33
userspace/py/lib/text_region.py
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@ -6,6 +6,17 @@ import os
import cairo
import toaru_fonts
_emoji_available = os.path.exists('/usr/share/emoji')
if _emoji_available:
_emoji_values = [int(x.replace('.png',''),16) for x in os.listdir('/usr/share/emoji') if x.endswith('.png') and not '-' in x]
_emoji_table = {}
def get_emoji(emoji):
if not emoji in _emoji_table:
_emoji_table[emoji] = cairo.ImageSurface.create_from_png('/usr/share/emoji/' + hex(ord(emoji)).replace('0x','')+'.png')
return _emoji_table[emoji]
class TextUnit(object):
def __init__(self, string, unit_type, font):
self.string = string
@ -14,13 +25,20 @@ class TextUnit(object):
self.width = font.width(self.string) if font else 0
self.extra = {}
self.tag_group = None
if self.unit_type == 2 and _emoji_available:
if ord(self.string) > 0x1000 and ord(self.string) in _emoji_values:
self.extra['emoji'] = True
self.extra['img'] = get_emoji(self.string)
self.extra['offset'] = font.font_size
self.string = ""
self.width = font.font_size
def set_tag_group(self, tag_group):
self.tag_group = tag_group
self.tag_group.append(self)
def set_font(self, font):
if self.unit_type == 4: return
if 'img' in self.extra: return
self.font = font
self.width = font.width(self.string) if font else 0
@ -140,6 +158,8 @@ class TextRegion(object):
font = self.font
def char_width(char):
if _emoji_available and ord(char) in _emoji_values:
return 2
x = unicodedata.east_asian_width(char)
if x == 'Na': return 1
if x == 'N': return 1
@ -380,6 +400,17 @@ class TextRegion(object):
cr.set_source_surface(unit.extra['img'],0,-unit.extra['offset']-self.line_height+extra)
cr.fill()
cr.restore()
elif unit.unit_type == 2 and 'emoji' in unit.extra:
cr.save()
extra = 3
cr.translate(self.x + left_align, self.y + current_height + top_align -self.line_height+extra)
if unit.extra['img'].get_height() > self.line_height - 3:
scale = (self.line_height - 3) / unit.extra['img'].get_height()
cr.scale(scale,scale)
cr.rectangle(0,0,unit.extra['img'].get_width(),unit.extra['img'].get_height())
cr.set_source_surface(unit.extra['img'],0,0)
cr.fill()
cr.restore()
elif unit.font:
unit.font.write(context, self.x + left_align, self.y + current_height + top_align, unit.string)
left_align += unit.width