364 lines
13 KiB
Python
364 lines
13 KiB
Python
# ----------------------------------------------------------------------------
|
|
# pyglet
|
|
# Copyright (c) 2006-2008 Alex Holkner
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
#
|
|
# * Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# * Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in
|
|
# the documentation and/or other materials provided with the
|
|
# distribution.
|
|
# * Neither the name of pyglet nor the names of its
|
|
# contributors may be used to endorse or promote products
|
|
# derived from this software without specific prior written
|
|
# permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
|
# ----------------------------------------------------------------------------
|
|
|
|
'''Decode HTML into attributed text.
|
|
|
|
A subset of HTML 4.01 Transitional is implemented. The following elements are
|
|
supported fully::
|
|
|
|
B BLOCKQUOTE BR CENTER CODE DD DIR DL EM FONT H1 H2 H3 H4 H5 H6 I IMG KBD
|
|
LI MENU OL P PRE Q SAMP STRONG SUB SUP TT U UL VAR
|
|
|
|
The mark (bullet or number) of a list item is separated from the body of the
|
|
list item with a tab, as the pyglet document model does not allow
|
|
out-of-stream text. This means lists display as expected, but behave a little
|
|
oddly if edited.
|
|
|
|
No CSS styling is supported.
|
|
'''
|
|
|
|
__docformat__ = 'restructuredtext'
|
|
__version__ = '$Id: $'
|
|
|
|
import HTMLParser
|
|
import htmlentitydefs
|
|
import os
|
|
import re
|
|
|
|
import pyglet
|
|
from pyglet.text.formats import structured
|
|
|
|
def _hex_color(val):
|
|
return [(val >> 16) & 0xff, (val >> 8) & 0xff, val & 0xff, 255]
|
|
|
|
_color_names = {
|
|
'black': _hex_color(0x000000),
|
|
'silver': _hex_color(0xc0c0c0),
|
|
'gray': _hex_color(0x808080),
|
|
'white': _hex_color(0xffffff),
|
|
'maroon': _hex_color(0x800000),
|
|
'red': _hex_color(0xff0000),
|
|
'purple': _hex_color(0x800080),
|
|
'fucsia': _hex_color(0x008000),
|
|
'green': _hex_color(0x00ff00),
|
|
'lime': _hex_color(0xffff00),
|
|
'olive': _hex_color(0x808000),
|
|
'yellow': _hex_color(0xff0000),
|
|
'navy': _hex_color(0x000080),
|
|
'blue': _hex_color(0x0000ff),
|
|
'teal': _hex_color(0x008080),
|
|
'aqua': _hex_color(0x00ffff),
|
|
}
|
|
|
|
def _parse_color(value):
|
|
if value.startswith('#'):
|
|
return _hex_color(int(value[1:], 16))
|
|
else:
|
|
try:
|
|
return _color_names[value.lower()]
|
|
except KeyError:
|
|
raise ValueError()
|
|
|
|
_whitespace_re = re.compile(u'[\u0020\u0009\u000c\u200b\r\n]+', re.DOTALL)
|
|
|
|
_metadata_elements = ['head', 'title']
|
|
|
|
_block_elements = ['p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
|
|
'ul', 'ol', 'dir', 'menu',
|
|
'pre', 'dl', 'div', 'center',
|
|
'noscript', 'noframes', 'blockquote', 'form',
|
|
'isindex', 'hr', 'table', 'fieldset', 'address',
|
|
# Incorrect, but we treat list items as blocks:
|
|
'li', 'dd', 'dt', ]
|
|
|
|
|
|
_block_containers = ['_top_block',
|
|
'body', 'div', 'center', 'object', 'applet',
|
|
'blockquote', 'ins', 'del', 'dd', 'li', 'form',
|
|
'fieldset', 'button', 'th', 'td', 'iframe', 'noscript',
|
|
'noframes',
|
|
# Incorrect, but we treat list items as blocks:
|
|
'ul', 'ol', 'dir', 'menu', 'dl']
|
|
|
|
|
|
class HTMLDecoder(HTMLParser.HTMLParser, structured.StructuredTextDecoder):
|
|
'''Decoder for HTML documents.
|
|
'''
|
|
#: Default style attributes for unstyled text in the HTML document.
|
|
#:
|
|
#: :type: dict
|
|
default_style = {
|
|
'font_name': 'Times New Roman',
|
|
'font_size': 12,
|
|
'margin_bottom': '12pt',
|
|
}
|
|
|
|
#: Map HTML font sizes to actual font sizes, in points.
|
|
#:
|
|
#: :type: dict
|
|
font_sizes = {
|
|
1: 8,
|
|
2: 10,
|
|
3: 12,
|
|
4: 14,
|
|
5: 18,
|
|
6: 24,
|
|
7: 48
|
|
}
|
|
|
|
def decode_structured(self, text, location):
|
|
self.location = location
|
|
self._font_size_stack = [3]
|
|
self.list_stack.append(structured.UnorderedListBuilder({}))
|
|
self.strip_leading_space = True
|
|
self.block_begin = True
|
|
self.need_block_begin = False
|
|
self.element_stack = ['_top_block']
|
|
self.in_metadata = False
|
|
self.in_pre = False
|
|
|
|
self.push_style('_default', self.default_style)
|
|
|
|
self.feed(text)
|
|
self.close()
|
|
|
|
def get_image(self, filename):
|
|
return pyglet.image.load(filename, file=self.location.open(filename))
|
|
|
|
def prepare_for_data(self):
|
|
if self.need_block_begin:
|
|
self.add_text('\n')
|
|
self.block_begin = True
|
|
self.need_block_begin = False
|
|
|
|
def handle_data(self, data):
|
|
if self.in_metadata:
|
|
return
|
|
|
|
if self.in_pre:
|
|
self.add_text(data)
|
|
else:
|
|
data = _whitespace_re.sub(' ', data)
|
|
if data.strip():
|
|
self.prepare_for_data()
|
|
if self.block_begin or self.strip_leading_space:
|
|
data = data.lstrip()
|
|
self.block_begin = False
|
|
self.add_text(data)
|
|
self.strip_leading_space = data.endswith(' ')
|
|
|
|
def handle_starttag(self, tag, case_attrs):
|
|
if self.in_metadata:
|
|
return
|
|
|
|
element = tag.lower()
|
|
attrs = {}
|
|
for key, value in case_attrs:
|
|
attrs[key.lower()] = value
|
|
|
|
if element in _metadata_elements:
|
|
self.in_metadata = True
|
|
elif element in _block_elements:
|
|
# Pop off elements until we get to a block container.
|
|
while self.element_stack[-1] not in _block_containers:
|
|
self.handle_endtag(self.element_stack[-1])
|
|
if not self.block_begin:
|
|
self.add_text('\n')
|
|
self.block_begin = True
|
|
self.need_block_begin = False
|
|
self.element_stack.append(element)
|
|
|
|
style = {}
|
|
if element in ('b', 'strong'):
|
|
style['bold'] = True
|
|
elif element in ('i', 'em', 'var'):
|
|
style['italic'] = True
|
|
elif element in ('tt', 'code', 'samp', 'kbd'):
|
|
style['font_name'] = 'Courier New'
|
|
elif element == 'u':
|
|
color = self.current_style.get('color')
|
|
if color is None:
|
|
color = [0, 0, 0, 255]
|
|
style['underline'] = color
|
|
elif element == 'font':
|
|
if 'face' in attrs:
|
|
style['font_name'] = attrs['face'].split(',')
|
|
if 'size' in attrs:
|
|
size = attrs['size']
|
|
try:
|
|
if size.startswith('+'):
|
|
size = self._font_size_stack[-1] + int(size[1:])
|
|
elif size.startswith('-'):
|
|
size = self._font_size_stack[-1] - int(size[1:])
|
|
else:
|
|
size = int(size)
|
|
except ValueError:
|
|
size = 3
|
|
self._font_size_stack.append(size)
|
|
if size in self.font_sizes:
|
|
style['font_size'] = self.font_sizes.get(size, 3)
|
|
else:
|
|
self._font_size_stack.append(self._font_size_stack[-1])
|
|
if 'color' in attrs:
|
|
try:
|
|
style['color'] = _parse_color(attrs['color'])
|
|
except ValueError:
|
|
pass
|
|
elif element == 'sup':
|
|
size = self._font_size_stack[-1] - 1
|
|
style['font_size'] = self.font_sizes.get(size, 1)
|
|
style['baseline'] = '3pt'
|
|
elif element == 'sub':
|
|
size = self._font_size_stack[-1] - 1
|
|
style['font_size'] = self.font_sizes.get(size, 1)
|
|
style['baseline'] = '-3pt'
|
|
elif element == 'h1':
|
|
style['font_size'] = 24
|
|
style['bold'] = True
|
|
style['align'] = 'center'
|
|
elif element == 'h2':
|
|
style['font_size'] = 18
|
|
style['bold'] = True
|
|
elif element == 'h3':
|
|
style['font_size'] = 16
|
|
style['bold'] = True
|
|
elif element == 'h4':
|
|
style['font_size'] = 14
|
|
style['bold'] = True
|
|
elif element == 'h5':
|
|
style['font_size'] = 12
|
|
style['bold'] = True
|
|
elif element == 'h6':
|
|
style['font_size'] = 12
|
|
style['italic'] = True
|
|
elif element == 'br':
|
|
self.add_text(u'\u2028')
|
|
self.strip_leading_space = True
|
|
elif element == 'p':
|
|
if attrs.get('align') in ('left', 'center', 'right'):
|
|
style['align'] = attrs['align']
|
|
elif element == 'center':
|
|
style['align'] = 'center'
|
|
elif element == 'pre':
|
|
style['font_name'] = 'Courier New'
|
|
style['margin_bottom'] = 0
|
|
self.in_pre = True
|
|
elif element == 'blockquote':
|
|
left_margin = self.current_style.get('margin_left') or 0
|
|
right_margin = self.current_style.get('margin_right') or 0
|
|
style['margin_left'] = left_margin + 60
|
|
style['margin_right'] = right_margin + 60
|
|
elif element == 'q':
|
|
self.handle_data(u'\u201c')
|
|
elif element == 'ol':
|
|
try:
|
|
start = int(attrs.get('start', 1))
|
|
except ValueError:
|
|
start = 1
|
|
format = attrs.get('type', '1') + '.'
|
|
builder = structured.OrderedListBuilder(start, format)
|
|
builder.begin(self, style)
|
|
self.list_stack.append(builder)
|
|
elif element in ('ul', 'dir', 'menu'):
|
|
type = attrs.get('type', 'disc').lower()
|
|
if type == 'circle':
|
|
mark = u'\u25cb'
|
|
elif type == 'square':
|
|
mark = u'\u25a1'
|
|
else:
|
|
mark = u'\u25cf'
|
|
builder = structured.UnorderedListBuilder(mark)
|
|
builder.begin(self, style)
|
|
self.list_stack.append(builder)
|
|
elif element == 'li':
|
|
self.list_stack[-1].item(self, style)
|
|
self.strip_leading_space = True
|
|
elif element == 'dl':
|
|
style['margin_bottom'] = 0
|
|
elif element == 'dd':
|
|
left_margin = self.current_style.get('margin_left') or 0
|
|
style['margin_left'] = left_margin + 30
|
|
elif element == 'img':
|
|
image = self.get_image(attrs.get('src'))
|
|
if image:
|
|
width = attrs.get('width')
|
|
if width:
|
|
width = int(width)
|
|
height = attrs.get('height')
|
|
if height:
|
|
height = int(height)
|
|
self.prepare_for_data()
|
|
self.add_element(structured.ImageElement(image, width, height))
|
|
self.strip_leading_space = False
|
|
|
|
self.push_style(element, style)
|
|
|
|
def handle_endtag(self, tag):
|
|
element = tag.lower()
|
|
if element not in self.element_stack:
|
|
return
|
|
|
|
self.pop_style(element)
|
|
while self.element_stack.pop() != element:
|
|
pass
|
|
|
|
if element in _metadata_elements:
|
|
self.in_metadata = False
|
|
elif element in _block_elements:
|
|
self.block_begin = False
|
|
self.need_block_begin = True
|
|
|
|
if element == 'font' and len(self._font_size_stack) > 1:
|
|
self._font_size_stack.pop()
|
|
elif element == 'pre':
|
|
self.in_pre = False
|
|
elif element == 'q':
|
|
self.handle_data(u'\u201d')
|
|
elif element in ('ul', 'ol'):
|
|
if len(self.list_stack) > 1:
|
|
self.list_stack.pop()
|
|
|
|
def handle_entityref(self, name):
|
|
if name in htmlentitydefs.name2codepoint:
|
|
self.handle_data(unichr(htmlentitydefs.name2codepoint[name]))
|
|
|
|
def handle_charref(self, name):
|
|
name = name.lower()
|
|
try:
|
|
if name.startswith('x'):
|
|
self.handle_data(unichr(int(name[1:], 16)))
|
|
else:
|
|
self.handle_data(unichr(int(name)))
|
|
except ValueError:
|
|
pass
|