[kupfer: 47/51] darkstyle: Move to customtheme.py and provide 'dark' and 'square'

[Ulrik Sverdrup <usverdrup src gnome org>]

commit 3b7b6f809e94e0767f0cee1aea12465298bad876
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Mon Mar 28 16:51:50 2011 +0200

    darkstyle: Move to customtheme.py and provide 'dark' and 'square'

 Documentation/GTKTheming.rst |    2 +-
 kupfer/plugin/customtheme.py |  163 ++++++++++++++++++++++++++++++++++++++++++
 kupfer/plugin/darkstyle.py   |  105 ---------------------------
 3 files changed, 164 insertions(+), 106 deletions(-)
---
diff --git a/Documentation/GTKTheming.rst b/Documentation/GTKTheming.rst
index 38c52e0..2477b8c 100644
--- a/Documentation/GTKTheming.rst
+++ b/Documentation/GTKTheming.rst
@@ -100,7 +100,7 @@ Injecting a Custom Style
 
 Any user can override the GTK+ style used for their applications. But
 more conventient is injecting the gtkrc at runtime by means of a Kupfer
-plugin. See ``kupfer/plugin/darkstyle.py`` for an example.
+plugin. See ``kupfer/plugin/customtheme.py`` for an example.
 
 .. vim: ft=rst tw=72 et sts=4 sw=4
 .. this document best viewed with rst2html
diff --git a/kupfer/plugin/customtheme.py b/kupfer/plugin/customtheme.py
new file mode 100644
index 0000000..eca9e4d
--- /dev/null
+++ b/kupfer/plugin/customtheme.py
@@ -0,0 +1,163 @@
+__kupfer_name__ = _("Custom Theme")
+__kupfer_sources__ = ()
+__description__ = _("Use a custom color theme")
+__version__ = ""
+__author__ = ""
+
+import os
+import gtk
+
+from kupfer import config
+from kupfer import plugin_support
+
+"""
+Kupfer's UI can be themed by using the normal GtkRc style language
+Theming can change colors and some pre-defined parameters, but
+not the layout.
+
+See also Documentation/GTKTheming.rst
+      or http://kaizer.se/wiki/kupfer/GTKTheming.html
+
+For general information about GTK+ styles,
+please see http://live.gnome.org/GnomeArt/Tutorials/GtkThemes
+
+"""
+
+SQUARE_STYLE = """
+style "square"
+{
+	MatchView :: corner-radius = 0
+	MatchView :: opacity = 100
+	Search :: list-opacity = 100
+	KupferWindow :: corner-radius = 0
+	KupferWindow :: opacity = 100
+	KupferWindow :: decorated = 0
+	KupferWindow :: border-width = 4
+
+}
+
+## The main window is kupfer
+widget "kupfer" style "square"
+widget "kupfer.*" style "square"
+
+## The result list is kupfer-list
+widget "kupfer-list.*" style "square"
+"""
+
+DARK_STYLE = """
+style "dark"
+{
+	## bg: background color
+	bg[NORMAL] = "#333"
+	bg[SELECTED] = "#000"
+	bg[ACTIVE] = "#222"
+	bg[PRELIGHT] = "#222"
+	bg[INSENSITIVE] = "#333"
+
+	## fg: foreground text color
+	fg[NORMAL] = "#DDD"
+	fg[SELECTED] = "#EEE"
+	fg[ACTIVE] = "#EEE"
+	fg[PRELIGHT] = "#EEE"
+	fg[INSENSITIVE] = "#DDD"
+
+	## text: text color in input widget and treeview
+	text[NORMAL] = "#EEE"
+	text[SELECTED] = "#EEE"
+	text[ACTIVE] = "#EEE"
+
+	## base: background color in input widget and treeview
+	base[NORMAL] = "#777"
+	base[SELECTED] = "#100"
+	base[ACTIVE] = "#112"
+
+	## These are UI Widget style properties with their approximate
+	## default values. These can all be overidden in the theme.
+	## MatchView :: corner-radius = 15
+	MatchView :: opacity = 90
+	## Search :: list-opacity = 93
+	## KupferWindow :: corner-radius = 15
+	KupferWindow :: opacity = 90
+	## KupferWindow :: decorated = 0
+	## KupferWindow :: border-width = 8
+}
+
+## The main window is kupfer
+widget "kupfer" style "dark"
+widget "kupfer.*" style "dark"
+
+## The result list is kupfer-list
+widget "kupfer-list.*" style "dark"
+
+## The menu button is *.kupfer-menu-button
+## widget "*.kupfer-menu-button" style "dark"
+## The description text is *.kupfer-description
+## widget "*.kupfer-description" style "dark"
+## The context menu is GtkWindow.kupfer-menu
+## widget "*.kupfer-menu" style "dark"
+"""
+
+
+all_styles = {
+	'default': None,
+	'square': SQUARE_STYLE,
+	'dark': DARK_STYLE,
+}
+
+__kupfer_settings__ = plugin_support.PluginSettings(
+		{
+			"key": "theme",
+			"label": _("Theme:"),
+			"type": str,
+			"value": 'default',
+			"alternatives": all_styles.keys(),
+		},
+	)
+
+def cache_filename():
+	return os.path.join(config.get_cache_home(), __name__)
+
+def re_read_theme():
+	## force re-read theme
+	## FIXME: re-read on all screens
+	settings = gtk.settings_get_default()
+	gtk.rc_reparse_all_for_settings(settings, True)
+
+def initialize_plugin(name):
+	"""
+	Theme changes are only reversible if we add
+	and remove gtkrc files.
+	"""
+	use_theme(all_styles.get(__kupfer_settings__['theme']))
+	__kupfer_settings__.connect_settings_changed_cb(on_change_theme)
+
+def on_change_theme(sender, key, value):
+	if key == 'theme':
+		use_theme(all_styles.get(__kupfer_settings__[key]))
+
+def use_theme(style_str):
+	"""
+	Use the GTK+ style in @style_str,
+	or unset if it is None
+	"""
+	filename = cache_filename()
+	if style_str is None:
+		filename = cache_filename()
+		gtk.rc_set_default_files([f for f in gtk.rc_get_default_files()
+		                          if f != filename])
+	else:
+		with open(filename, "wb") as rcfile:
+			rcfile.write(style_str)
+		gtk.rc_add_default_file(filename)
+	re_read_theme()
+
+def finalize_plugin(name):
+	use_theme(None)
+	re_read_theme()
+	## remove cache file
+	filename = cache_filename()
+	assert ("kupfer" in filename)
+	try:
+		os.unlink(filename)
+	except OSError:
+		pass