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Start work on CSS syntax highlighter

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This commit is contained in:
Kovid Goyal 2013-10-31 11:34:23 +05:30
parent 04745b77b9
commit ab4f53331e
3 changed files with 62 additions and 36 deletions
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51
src/calibre/gui2/tweak_book/editor/syntax/css.py Normal file
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@ -0,0 +1,51 @@
#!/usr/bin/env python
# vim:fileencoding=utf-8
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
from calibre.gui2.tweak_book.editor.syntax.base import SyntaxHighlighter
class State(object):
NORMAL = 0
def __init__(self, num):
self.parse = num & 0b1111
self.blocks = num >> 4
@property
def value(self):
return ((self.parse & 0b1111) | (max(0, self.blocks) << 4))
def normal(state, text, i, formats):
' The normal state (outside everything) '
return [(len(text), None)]
state_map = {
State.NORMAL:normal,
}
class CSSHighlighter(SyntaxHighlighter):
state_map = state_map
state_class = State
def __init__(self, parent):
SyntaxHighlighter.__init__(self, parent)
def create_formats(self):
# t = self.theme
self.formats = {
}
if __name__ == '__main__':
from calibre.gui2.tweak_book.editor.text import launch_editor
launch_editor('''\
@charset "utf-8";
/* A demonstration css sheet */
''', path_is_raw=True, syntax='css')

2
src/calibre/gui2/tweak_book/editor/syntax/html.py
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@ -314,4 +314,4 @@ if __name__ == '__main__':
<p>Some\xa0words\xa0separated\xa0by\xa0non-breaking\xa0spaces.</p>
</body>
</html>
''')
''', path_is_raw=True)

45
src/calibre/gui2/tweak_book/editor/text.py
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@ -17,6 +17,7 @@ from calibre.gui2.tweak_book import tprefs
from calibre.gui2.tweak_book.editor.themes import THEMES, DEFAULT_THEME, theme_color
from calibre.gui2.tweak_book.editor.syntax.base import SyntaxHighlighter
from calibre.gui2.tweak_book.editor.syntax.html import HTMLHighlighter
from calibre.gui2.tweak_book.editor.syntax.css import CSSHighlighter
_dff = None
def default_font_family():
@ -93,7 +94,7 @@ class TextEdit(QPlainTextEdit):
# }}}
def load_text(self, text, syntax='html'):
self.highlighter = {'html':HTMLHighlighter}.get(syntax, SyntaxHighlighter)(self)
self.highlighter = {'html':HTMLHighlighter, 'css':CSSHighlighter}.get(syntax, SyntaxHighlighter)(self)
self.highlighter.apply_theme(self.theme)
self.highlighter.setDocument(self.document())
self.setPlainText(text)
@ -199,49 +200,23 @@ class TextEdit(QPlainTextEdit):
ev.ignore()
# }}}
def launch_editor(path_to_edit):
if '<html' in path_to_edit:
def launch_editor(path_to_edit, path_is_raw=False, syntax='html'):
if path_is_raw:
raw = path_to_edit
else:
with open(path_to_edit, 'rb') as f:
raw = f.read().decode('utf-8')
ext = path_to_edit.rpartition('.')[-1].lower()
if ext in ('html', 'htm', 'xhtml', 'xhtm'):
syntax = 'html'
elif ext in ('css',):
syntax = 'css'
app = QApplication([]) # noqa
t = TextEdit()
t.load_text(raw)
t.load_text(raw, syntax=syntax)
d = QDialog()
d.setLayout(QVBoxLayout())
d.layout().addWidget(t)
d.exec_()
if __name__ == '__main__':
launch_editor(
textwrap.dedent('''\
<html>
<head>
<title>Page title</title>
<style type="text/css">
body { color: green; }
</style>
</head id="1">
<body>
<!-- The start of the document -->a
<h1 class="head" id="one" >A heading</h1>
<p> A single &. An proper entity &amp;.
A single < and a single >.
These cases are perfectly simple and easy to
distinguish. In a free hour, when our power of choice is
untrammelled and when nothing prevents our being able to do
what we like best, every pleasure is to be welcomed and every
pain avoided.</p>
<p>
But in certain circumstances and owing to the claims of duty or the obligations
of business it will frequently occur that pleasures have to be
repudiated and annoyances accepted. The wise man therefore
always holds in these matters to this principle of selection:
he rejects pleasures to secure other greater pleasures, or else
he endures pains.</p>
</body>
</html>
'''))