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-rw-r--r--src/xhtml.py307
1 files changed, 170 insertions, 137 deletions
diff --git a/src/xhtml.py b/src/xhtml.py
index 9c0ed7eb..a1628574 100644
--- a/src/xhtml.py
+++ b/src/xhtml.py
@@ -16,15 +16,17 @@ import re
import curses
from sleekxmpp.xmlstream import ET
-import xml.sax.saxutils
-
-from sys import version_info
+from io import BytesIO
+from xml import sax
+from xml.sax import saxutils
from config import config
import logging
digits = '0123456789' # never trust the modules
+XHTML_NS = 'http://www.w3.org/1999/xhtml'
+
# HTML named colors
colors = {
'aliceblue': 231,
@@ -176,8 +178,6 @@ colors = {
'yellowgreen': 149
}
-log = logging.getLogger(__name__)
-
whitespace_re = re.compile(r'\s+')
xhtml_attr_re = re.compile(r'\x19-?\d[^}]*}|\x19[buaio]')
@@ -225,144 +225,177 @@ def ncurses_color_to_html(color):
r = g = b = color / 24 * 6
return '#%02X%02X%02X' % (r*256/6, g*256/6, b*256/6)
-def xhtml_to_poezio_colors(xml):
- if isinstance(xml, str):
- try:
- xml = ET.fromstring(xml)
- except:
- log.error("Error decoding XML: [%s]", repr(xml), exc_info=True)
- return ""
- def parse_css(css):
- def get_color(value):
- if value[0] == '#':
- value = value[1:]
- length = len(value)
- if length != 3 and length != 6:
- return -1
- value = int(value, 16)
- if length == 6:
- r = int(value >> 16)
- g = int((value >> 8) & 0xff)
- b = int(value & 0xff)
- if r == g == b:
- return 232 + int(r/10.6251)
- div = 42.51
- else:
- r = int(value >> 8)
- g = int((value >> 4) & 0xf)
- b = int(value & 0xf)
- if r == g == b:
- return 232 + int(1.54*r)
- div = 2.51
- return 6*6*int(r/div) + 6*int(g/div) + int(b/div) + 16
- if value in colors:
- return colors[value]
- return -1
- shell = ''
- rules = css.split(';')
- for rule in rules:
- if ':' not in rule:
- continue
- key, value = rule.split(':', 1)
- key = key.strip()
- value = value.strip()
- if key == 'background-color':
- pass#shell += '\x191'
- elif key == 'color':
- color = get_color(value)
- if color != -1:
- shell += '\x19%d}' % color
- elif key == 'font-style':
- shell += '\x19i'
- elif key == 'font-weight':
- shell += '\x19b'
- elif key == 'margin-left':
- shell += ' '
- elif key == 'text-align':
- pass
- elif key == 'text-decoration':
- if value == 'underline':
- shell += '\x19u'
- elif value == 'blink':
- shell += '\x19a'
- return shell
-
- def trim(string):
- return re.sub(whitespace_re, ' ', string)
-
- builder = []
-
- if version_info[1] < 2: #deprecated
- elems = xml.getiterator()
- else:
- elems = xml.iter()
-
- for elem in elems:
- if elem.tag == '{http://www.w3.org/1999/xhtml}a':
- if 'href' in elem.attrib and elem.attrib['href'] != elem.text:
- builder.append('\x19u%s\x19o (%s)' % (trim(elem.attrib['href']), trim(elem.text if elem.text else "")))
+def parse_css(css):
+ def get_color(value):
+ if value[0] == '#':
+ value = value[1:]
+ length = len(value)
+ if length != 3 and length != 6:
+ return -1
+ value = int(value, 16)
+ if length == 6:
+ r = int(value >> 16)
+ g = int((value >> 8) & 0xff)
+ b = int(value & 0xff)
+ if r == g == b:
+ return 232 + int(r/10.6251)
+ div = 42.51
else:
- builder.append('\x19u' + (elem.text if elem.text else "") + '\x19o')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}blockquote':
- builder.append('“')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}body':
+ r = int(value >> 8)
+ g = int((value >> 4) & 0xf)
+ b = int(value & 0xf)
+ if r == g == b:
+ return 232 + int(1.54*r)
+ div = 2.51
+ return 6*6*int(r/div) + 6*int(g/div) + int(b/div) + 16
+ if value in colors:
+ return colors[value]
+ return -1
+ shell = ''
+ rules = css.split(';')
+ for rule in rules:
+ if ':' not in rule:
+ continue
+ key, value = rule.split(':', 1)
+ key = key.strip()
+ value = value.strip()
+ if key == 'background-color':
+ pass#shell += '\x191'
+ elif key == 'color':
+ color = get_color(value)
+ if color != -1:
+ shell += '\x19%d}' % color
+ elif key == 'font-style':
+ shell += '\x19i'
+ elif key == 'font-weight':
+ shell += '\x19b'
+ elif key == 'margin-left':
+ shell += ' '
+ elif key == 'text-align':
pass
- elif elem.tag == '{http://www.w3.org/1999/xhtml}br':
+ elif key == 'text-decoration':
+ if value == 'underline':
+ shell += '\x19u'
+ elif value == 'blink':
+ shell += '\x19a'
+ return shell
+
+def trim(string):
+ return re.sub(whitespace_re, ' ', string)
+
+class XHTMLHandler(sax.ContentHandler):
+ def __init__(self):
+ self.builder = []
+ self.formatting = []
+ self.attrs = []
+ self.list_state = []
+ self.is_pre = False
+
+ @property
+ def result(self):
+ return ''.join(self.builder).strip()
+
+ def append_formatting(self, formatting):
+ self.formatting.append(formatting)
+ self.builder.append(formatting)
+
+ def pop_formatting(self):
+ self.formatting.pop()
+ self.builder.append('\x19o' + ''.join(self.formatting))
+
+ def characters(self, characters):
+ self.builder.append(characters if self.is_pre else trim(characters))
+
+ def startElementNS(self, name, _, attrs):
+ if name[0] != XHTML_NS:
+ return
+
+ builder = self.builder
+ attrs = {name: value for ((ns, name), value) in attrs.items() if ns is None}
+ self.attrs.append(attrs)
+
+ if 'style' in attrs:
+ style = parse_css(attrs['style'])
+ self.append_formatting(style)
+
+ name = name[1]
+ if name == 'a':
+ self.append_formatting('\x19u')
+ elif name == 'blockquote':
+ builder.append('“')
+ elif name == 'br':
builder.append('\n')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}cite':
- builder.append('\x19u')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}em':
- builder.append('\x19i')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}img' and 'src' in elem.attrib:
- if 'alt' in elem.attrib:
- builder.append('%s (%s)' % (trim(elem.attrib['src']), trim(elem.attrib['alt'])))
+ elif name == 'cite':
+ self.append_formatting('\x19u')
+ elif name == 'em':
+ self.append_formatting('\x19i')
+ elif name == 'img':
+ builder.append(trim(attrs['src']))
+ if 'alt' in attrs:
+ builder.append(' (%s)' % trim(attrs['alt']))
+ elif name == 'ul':
+ self.list_state.append('ul')
+ elif name == 'ol':
+ self.list_state.append(1)
+ elif name == 'li':
+ try:
+ state = self.list_state[-1]
+ except IndexError:
+ state = 'ul'
+ if state == 'ul':
+ builder.append('\n• ')
else:
- builder.append(elem.attrib['src'])
- elif elem.tag == '{http://www.w3.org/1999/xhtml}li':
- pass
- elif elem.tag == '{http://www.w3.org/1999/xhtml}ol':
- pass
- elif elem.tag == '{http://www.w3.org/1999/xhtml}p':
- pass
- elif elem.tag == '{http://www.w3.org/1999/xhtml}span':
- pass
- elif elem.tag == '{http://www.w3.org/1999/xhtml}strong':
- builder.append('\x19b')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}ul':
- pass
-
- if ('style' in elem.attrib and elem.tag != '{http://www.w3.org/1999/xhtml}br'
- and elem.tag != '{http://www.w3.org/1999/xhtml}em'
- and elem.tag != '{http://www.w3.org/1999/xhtml}strong'):
- builder.append(parse_css(elem.attrib['style']))
+ builder.append('\n%d) ' % state)
+ state += 1
+ self.list_state[-1] = state
+ elif name == 'p':
+ builder.append('\n')
+ elif name == 'pre':
+ builder.append('\n')
+ self.is_pre = True
+ elif name == 'strong':
+ self.append_formatting('\x19b')
- if (elem.text and elem.tag != '{http://www.w3.org/1999/xhtml}a'
- and elem.tag != '{http://www.w3.org/1999/xhtml}br'
- and elem.tag != '{http://www.w3.org/1999/xhtml}img'):
- builder.append(trim(elem.text))
+ def endElementNS(self, name, _):
+ if name[0] != XHTML_NS:
+ return
- if ('style' in elem.attrib and elem.tag != '{http://www.w3.org/1999/xhtml}br'
- and elem.tag != '{http://www.w3.org/1999/xhtml}em'
- and elem.tag != '{http://www.w3.org/1999/xhtml}strong'):
- builder.append('\x19o')
+ builder = self.builder
+ attrs = self.attrs.pop()
+ name = name[1]
- if elem.tag == '{http://www.w3.org/1999/xhtml}blockquote':
+ if name == 'a':
+ self.pop_formatting()
+ if 'href' in attrs:
+ builder.append(' (%s)' % trim(attrs['href']))
+ elif name == 'blockquote':
builder.append('”')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}cite':
- builder.append('\x19o')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}em':
- builder.append('\x19o')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}strong' or elem.tag == '{http://www.w3.org/1999/xhtml}b':
- builder.append('\x19o')
- elif elem.tag == '{http://www.w3.org/1999/xhtml}u':
- builder.append('\x19o')
-
- if 'title' in elem.attrib:
- builder.append(' [' + elem.attrib['title'] + ']')
-
- if elem.tail:
- builder.append(trim(elem.tail))
- return ''.join(builder)
+ elif name in ('cite', 'em', 'strong'):
+ self.pop_formatting()
+ elif name in ('ol', 'p', 'ul'):
+ builder.append('\n')
+ elif name == 'pre':
+ builder.append('\n')
+ self.is_pre = False
+
+ if 'style' in attrs:
+ self.pop_formatting()
+
+ if 'title' in attrs:
+ builder.append(' [' + attrs['title'] + ']')
+
+def xhtml_to_poezio_colors(xml):
+ if isinstance(xml, str):
+ xml = xml.encode('utf8')
+ elif not isinstance(xml, bytes):
+ xml = ET.tostring(xml)
+
+ handler = XHTMLHandler()
+ parser = sax.make_parser()
+ parser.setFeature(sax.handler.feature_namespaces, True)
+ parser.setContentHandler(handler)
+ parser.parse(BytesIO(xml))
+ return handler.result
def clean_text(s):
"""
@@ -441,7 +474,7 @@ def poezio_colors_to_html(string):
if current_attrs and not tag_open:
build.append('<span style="%s">' % format_inline_css(current_attrs))
tag_open = True
- build.append(xml.sax.saxutils.escape(string[:next_attr_char]))
+ build.append(saxutils.escape(string[:next_attr_char]))
if attr_char == 'o':
if tag_open:
@@ -468,7 +501,7 @@ def poezio_colors_to_html(string):
if current_attrs and not tag_open and string:
build.append('<span style="%s">' % format_inline_css(current_attrs))
tag_open = True
- build.append(xml.sax.saxutils.escape(string))
+ build.append(saxutils.escape(string))
if tag_open:
build.append('</span>')
build.append("</p></body>")
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 01:04:19 +0000