Soulter
284 lines
11 KiB
Python
284 lines
11 KiB
Python
import re
|
|
import aiohttp
|
|
from io import BytesIO
|
|
|
|
from . import RenderStrategy
|
|
from PIL import ImageFont, Image, ImageDraw
|
|
from astrbot.core.utils.io import save_temp_img
|
|
|
|
class LocalRenderStrategy(RenderStrategy):
|
|
|
|
async def render_custom_template(self, tmpl_str: str, tmpl_data: dict, return_url: bool=True) -> str:
|
|
raise NotImplementedError
|
|
|
|
def get_font(self, size: int) -> ImageFont.FreeTypeFont:
|
|
# common and default fonts on Windows, macOS and Linux
|
|
fonts = ["msyh.ttc", "NotoSansCJK-Regular.ttc", "msyhbd.ttc", "PingFang.ttc", "Heiti.ttc"]
|
|
for font in fonts:
|
|
try:
|
|
font = ImageFont.truetype(font, size)
|
|
return font
|
|
except Exception:
|
|
pass
|
|
|
|
async def render(self, text: str, return_url: bool=False) -> str:
|
|
font_size = 26
|
|
image_width = 800
|
|
image_height = 600
|
|
font_color = (0, 0, 0)
|
|
bg_color = (255, 255, 255)
|
|
|
|
HEADER_MARGIN = 20
|
|
HEADER_FONT_STANDARD_SIZE = 42
|
|
|
|
QUOTE_LEFT_LINE_MARGIN = 10
|
|
QUOTE_FONT_LINE_MARGIN = 6 # 引用文字距离左边线的距离和上下的距离
|
|
QUOTE_LEFT_LINE_HEIGHT = font_size + QUOTE_FONT_LINE_MARGIN * 2
|
|
QUOTE_LEFT_LINE_WIDTH = 5
|
|
QUOTE_LEFT_LINE_COLOR = (180, 180, 180)
|
|
QUOTE_FONT_SIZE = font_size
|
|
QUOTE_FONT_COLOR = (180, 180, 180)
|
|
# QUOTE_BG_COLOR = (255, 255, 255)
|
|
|
|
CODE_BLOCK_MARGIN = 10
|
|
CODE_BLOCK_FONT_SIZE = font_size
|
|
CODE_BLOCK_FONT_COLOR = (255, 255, 255)
|
|
CODE_BLOCK_BG_COLOR = (240, 240, 240)
|
|
CODE_BLOCK_CODES_MARGIN_VERTICAL = 5 # 代码块和代码之间的距离
|
|
CODE_BLOCK_CODES_MARGIN_HORIZONTAL = 5 # 代码块和代码之间的距离
|
|
CODE_BLOCK_TEXT_MARGIN = 4 # 代码和代码之间的距离
|
|
|
|
INLINE_CODE_MARGIN = 8
|
|
INLINE_CODE_FONT_SIZE = font_size
|
|
INLINE_CODE_FONT_COLOR = font_color
|
|
INLINE_CODE_FONT_MARGIN = 4
|
|
INLINE_CODE_BG_COLOR = (230, 230, 230)
|
|
INLINE_CODE_BG_HEIGHT = INLINE_CODE_FONT_SIZE + INLINE_CODE_FONT_MARGIN * 2
|
|
|
|
LIST_MARGIN = 8
|
|
LIST_FONT_SIZE = font_size
|
|
LIST_FONT_COLOR = font_color
|
|
|
|
TEXT_LINE_MARGIN = 8
|
|
|
|
IMAGE_MARGIN = 15
|
|
# 用于匹配图片的正则表达式
|
|
IMAGE_REGEX = r"!\s*\[.*?\]\s*\((.*?)\)"
|
|
|
|
# 加载字体
|
|
font = self.get_font(font_size)
|
|
|
|
images: Image = {}
|
|
|
|
# pre_process, get height of each line
|
|
pre_lines = text.split('\n')
|
|
height = 0
|
|
pre_in_code = False
|
|
i = -1
|
|
_pre_lines = []
|
|
for line in pre_lines:
|
|
i += 1
|
|
# 处理图片
|
|
if re.search(IMAGE_REGEX, line):
|
|
try:
|
|
image_url = re.findall(IMAGE_REGEX, line)[0]
|
|
print(image_url)
|
|
async with aiohttp.ClientSession(trust_env=True) as session:
|
|
async with session.get(image_url) as resp:
|
|
image_res = Image.open(BytesIO(await resp.read()))
|
|
images[i] = image_res
|
|
# 最大不得超过image_width的50%
|
|
img_height = image_res.size[1]
|
|
|
|
if image_res.size[0] > image_width*0.5:
|
|
image_res = image_res.resize(
|
|
(int(image_width*0.5), int(image_res.size[1]*image_width*0.5/image_res.size[0])))
|
|
img_height = image_res.size[1]
|
|
|
|
height += img_height + IMAGE_MARGIN*2
|
|
|
|
line = re.sub(IMAGE_REGEX, "", line)
|
|
except Exception as e:
|
|
print(e)
|
|
line = re.sub(IMAGE_REGEX, "\n[加载失败的图片]\n", line)
|
|
continue
|
|
|
|
line.replace("\t", " ")
|
|
if font.getsize(line)[0] > image_width:
|
|
cp = line
|
|
_width = 0
|
|
_word_cnt = 0
|
|
for ii in range(len(line)):
|
|
# 检测是否是中文
|
|
_width += font.getsize(line[ii])[0]
|
|
_word_cnt += 1
|
|
if _width > image_width:
|
|
_pre_lines.append(cp[:_word_cnt])
|
|
cp = cp[_word_cnt:]
|
|
_word_cnt = 0
|
|
_width = 0
|
|
_pre_lines.append(cp)
|
|
else:
|
|
_pre_lines.append(line)
|
|
pre_lines = _pre_lines
|
|
|
|
i = -1
|
|
for line in pre_lines:
|
|
if line == "":
|
|
height += TEXT_LINE_MARGIN
|
|
continue
|
|
i += 1
|
|
line = line.strip()
|
|
if pre_in_code and not line.startswith("```"):
|
|
height += font_size + CODE_BLOCK_TEXT_MARGIN
|
|
# pre_codes.append(line)
|
|
continue
|
|
if line.startswith("#"):
|
|
header_level = line.count("#")
|
|
height += HEADER_FONT_STANDARD_SIZE + HEADER_MARGIN*2 - header_level * 4
|
|
elif line.startswith("-"):
|
|
height += font_size+LIST_MARGIN*2
|
|
elif line.startswith(">"):
|
|
height += font_size+QUOTE_LEFT_LINE_MARGIN*2
|
|
elif line.startswith("```"):
|
|
if pre_in_code:
|
|
pre_in_code = False
|
|
# pre_codes = []
|
|
height += CODE_BLOCK_MARGIN
|
|
else:
|
|
pre_in_code = True
|
|
height += CODE_BLOCK_MARGIN
|
|
elif re.search(r"`(.*?)`", line):
|
|
height += font_size+INLINE_CODE_FONT_MARGIN*2+INLINE_CODE_MARGIN*2
|
|
else:
|
|
height += font_size + TEXT_LINE_MARGIN*2
|
|
|
|
text = '\n'.join(pre_lines)
|
|
image_height = height
|
|
if image_height < 100:
|
|
image_height = 100
|
|
image_width += 20
|
|
|
|
# 创建空白图像
|
|
image = Image.new('RGB', (image_width, image_height), bg_color)
|
|
draw = ImageDraw.Draw(image)
|
|
|
|
# 设置初始位置
|
|
x, y = 10, 10
|
|
|
|
# 解析Markdown文本
|
|
lines = text.split("\n")
|
|
# lines = pre_lines
|
|
|
|
in_code_block = False
|
|
code_block_start_y = 0
|
|
code_block_codes = []
|
|
|
|
index = -1
|
|
for line in lines:
|
|
index += 1
|
|
if in_code_block and not line.startswith("```"):
|
|
code_block_codes.append(line)
|
|
y += font_size + CODE_BLOCK_TEXT_MARGIN
|
|
continue
|
|
line = line.strip()
|
|
|
|
if line.startswith("#"):
|
|
# 处理标题
|
|
header_level = line.count("#")
|
|
line = line.strip("#").strip()
|
|
font_size_header = HEADER_FONT_STANDARD_SIZE - header_level * 4
|
|
font = self.get_font(font_size_header)
|
|
y += HEADER_MARGIN # 上边距
|
|
# 字间距
|
|
draw.text((x, y), line, font=font, fill=font_color)
|
|
draw.line((x, y + font_size_header + 8, image_width - 10,
|
|
y + font_size_header + 8), fill=(230, 230, 230), width=3)
|
|
y += font_size_header + HEADER_MARGIN
|
|
|
|
elif line.startswith(">"):
|
|
# 处理引用
|
|
quote_text = line.strip(">")
|
|
y += QUOTE_LEFT_LINE_MARGIN
|
|
draw.line((x, y, x, y + QUOTE_LEFT_LINE_HEIGHT),
|
|
fill=QUOTE_LEFT_LINE_COLOR, width=QUOTE_LEFT_LINE_WIDTH)
|
|
font = self.get_font(QUOTE_FONT_SIZE)
|
|
draw.text((x + QUOTE_FONT_LINE_MARGIN, y + QUOTE_FONT_LINE_MARGIN),
|
|
quote_text, font=font, fill=QUOTE_FONT_COLOR)
|
|
y += font_size + QUOTE_LEFT_LINE_HEIGHT + QUOTE_LEFT_LINE_MARGIN
|
|
|
|
elif line.startswith("-"):
|
|
# 处理列表
|
|
list_text = line.strip("-").strip()
|
|
font = self.get_font(LIST_FONT_SIZE)
|
|
y += LIST_MARGIN
|
|
draw.text((x, y), " · " + list_text,
|
|
font=font, fill=LIST_FONT_COLOR)
|
|
y += font_size + LIST_MARGIN
|
|
|
|
elif line.startswith("```"):
|
|
if not in_code_block:
|
|
code_block_start_y = y+CODE_BLOCK_MARGIN
|
|
in_code_block = True
|
|
else:
|
|
# print(code_block_codes)
|
|
in_code_block = False
|
|
codes = "\n".join(code_block_codes)
|
|
code_block_codes = []
|
|
draw.rounded_rectangle((x, code_block_start_y, image_width - 10, y+CODE_BLOCK_CODES_MARGIN_VERTICAL +
|
|
CODE_BLOCK_TEXT_MARGIN), radius=5, fill=CODE_BLOCK_BG_COLOR, width=2)
|
|
font = self.get_font(CODE_BLOCK_FONT_SIZE)
|
|
draw.text((x + CODE_BLOCK_CODES_MARGIN_HORIZONTAL, code_block_start_y +
|
|
CODE_BLOCK_CODES_MARGIN_VERTICAL), codes, font=font, fill=font_color)
|
|
y += CODE_BLOCK_CODES_MARGIN_VERTICAL + CODE_BLOCK_MARGIN
|
|
# y += font_size+10
|
|
elif re.search(r"`(.*?)`", line):
|
|
y += INLINE_CODE_MARGIN # 上边距
|
|
# 处理行内代码
|
|
code_regex = r"`(.*?)`"
|
|
parts_inline = re.findall(code_regex, line)
|
|
parts = re.split(code_regex, line)
|
|
for part in parts:
|
|
# the judge has a tiny bug.
|
|
# when line is like "hi`hi`". all the parts will be in parts_inline.
|
|
if part in parts_inline:
|
|
font = self.get_font(INLINE_CODE_FONT_SIZE)
|
|
code_text = part.strip("`")
|
|
code_width = font.getsize(
|
|
code_text)[0] + INLINE_CODE_FONT_MARGIN*2
|
|
x += INLINE_CODE_MARGIN
|
|
code_box = (x, y, x + code_width,
|
|
y + INLINE_CODE_BG_HEIGHT)
|
|
draw.rounded_rectangle(
|
|
code_box, radius=5, fill=INLINE_CODE_BG_COLOR, width=2) # 使用灰色填充矩形框作为引用背景
|
|
draw.text((x+INLINE_CODE_FONT_MARGIN, y),
|
|
code_text, font=font, fill=font_color)
|
|
x += code_width+INLINE_CODE_MARGIN-INLINE_CODE_FONT_MARGIN
|
|
else:
|
|
font = self.get_font(font_size)
|
|
draw.text((x, y), part, font=font, fill=font_color)
|
|
x += font.getsize(part)[0]
|
|
y += font_size + INLINE_CODE_MARGIN
|
|
x = 10
|
|
|
|
else:
|
|
# 处理普通文本
|
|
if line == "":
|
|
y += TEXT_LINE_MARGIN
|
|
else:
|
|
font = self.get_font(font_size)
|
|
|
|
draw.text((x, y), line, font=font, fill=font_color)
|
|
y += font_size + TEXT_LINE_MARGIN*2
|
|
|
|
# 图片特殊处理
|
|
if index in images:
|
|
image_res = images[index]
|
|
# 最大不得超过image_width的50%
|
|
if image_res.size[0] > image_width*0.5:
|
|
image_res = image_res.resize(
|
|
(int(image_width*0.5), int(image_res.size[1]*image_width*0.5/image_res.size[0])))
|
|
image.paste(image_res, (IMAGE_MARGIN, y))
|
|
y += image_res.size[1] + IMAGE_MARGIN*2
|
|
return save_temp_img(image)
|