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Highlight text enclosed by heading/bold/italic tags

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Kovid Goyal 2013-10-30 16:01:04 +05:30
parent 952658394b
commit b5be77fe43
1 changed files with 24 additions and 4 deletions
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28
src/calibre/gui2/tweak_book/editor/syntax/html.py
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@ -14,6 +14,9 @@ from calibre.gui2.tweak_book.editor.syntax.base import SyntaxHighlighter
from html5lib.constants import cdataElements, rcdataElements from html5lib.constants import cdataElements, rcdataElements
cdata_tags = cdataElements | rcdataElements cdata_tags = cdataElements | rcdataElements
bold_tags = {'b', 'strong'} | {'h%d' % d for d in range(1, 7)}
italic_tags = {'i', 'em'}
normal_pat = re.compile(r'[^<>&]')
entity_pat = re.compile(r'&#{0,1}[a-zA-Z0-9]{1,8};') entity_pat = re.compile(r'&#{0,1}[a-zA-Z0-9]{1,8};')
tag_name_pat = re.compile(r'/{0,1}[a-zA-Z0-9:]+') tag_name_pat = re.compile(r'/{0,1}[a-zA-Z0-9:]+')
space_chars = ' \t\r\n\u000c' space_chars = ' \t\r\n\u000c'
@ -40,7 +43,7 @@ class State(object):
DQ_VAL = 9 DQ_VAL = 9
CDATA = 10 CDATA = 10
TAGS = {x:i+1 for i, x in enumerate(cdata_tags | {'b', 'em', 'i', 'string', 'a'} | {'h%d' % d for d in range(1, 7)})} TAGS = {x:i+1 for i, x in enumerate(cdata_tags | bold_tags | italic_tags)}
TAGS_RMAP = {v:k for k, v in TAGS.iteritems()} TAGS_RMAP = {v:k for k, v in TAGS.iteritems()}
UNKNOWN_TAG = '___' UNKNOWN_TAG = '___'
@ -111,7 +114,15 @@ def normal(state, text, i, formats):
if ch == '>': if ch == '>':
return [(1, formats['>'])] return [(1, formats['>'])]
return [(1, None)] t = normal_pat.search(text, i).group()
fmt = None
if state.bold or state.italic:
fmt = QTextCharFormat()
if state.bold:
fmt.setFontWeight(QFont.Bold)
if state.italic:
fmt.setFontItalic(True)
return [(len(t), fmt)]
def opening_tag(state, text, i, formats): def opening_tag(state, text, i, formats):
'An opening tag, like <a>' 'An opening tag, like <a>'
@ -127,8 +138,11 @@ def opening_tag(state, text, i, formats):
return [(len(m.group()), formats['tag'])] return [(len(m.group()), formats['tag'])]
if ch == '>': if ch == '>':
state.parse = state.NORMAL state.parse = state.NORMAL
if state.tag in cdata_tags: tag = state.tag.lower()
if tag in cdata_tags:
state.parse = state.CDATA state.parse = state.CDATA
state.bold += int(tag in bold_tags)
state.italic += int(tag in italic_tags)
return [(1, formats['tag'])] return [(1, formats['tag'])]
m = attribute_name_pat.match(text, i) m = attribute_name_pat.match(text, i)
if m is None: if m is None:
@ -187,6 +201,9 @@ def closing_tag(state, text, i, formats):
if pos == -1: if pos == -1:
return [(len(text) - i, formats['bad-closing'])] return [(len(text) - i, formats['bad-closing'])]
state.parse = state.NORMAL state.parse = state.NORMAL
tag = state.tag.lower()
state.bold -= int(tag in bold_tags)
state.italic -= int(tag in italic_tags)
num = pos - i + 1 num = pos - i + 1
ans = [(1, formats['end_tag'])] ans = [(1, formats['end_tag'])]
if num > 1: if num > 1:
@ -285,7 +302,7 @@ if __name__ == '__main__':
<html xml:lang="en" lang="en"> <html xml:lang="en" lang="en">
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<title>A title with a tag <span> in it</title> <title>A title with a tag <span> in it, the tag is treated as normal text</title>
<style type="text/css"> <style type="text/css">
body { body {
color: green; color: green;
@ -296,6 +313,9 @@ if __name__ == '__main__':
<body> <body>
<!-- The start of the actual body text --> <!-- The start of the actual body text -->
<h1>A heading that should appear in bold, with an <i>italic</i> word</h1> <h1>A heading that should appear in bold, with an <i>italic</i> word</h1>
<p>Some text with inline formatting, that is syntax highlighted. A <b>bold</b> word, and an <em>italic</em> word. \
<i>Some italic text with a <b>bold italic</b> word in </i> middle.</p>
<!-- Let's see what exotic constructs like namespace prefixes and empty attributes look like -->
<svg:svg xmlns:svg="http://whatever" /> <svg:svg xmlns:svg="http://whatever" />
<input disabled><input disabled /><span attr=<></span> <input disabled><input disabled /><span attr=<></span>
</body> </body>