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config: Make it possible to migrate values.

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Needed for #729.
This commit is contained in:
Florian Bruhin 2015-06-08 19:34:11 +02:00
parent 154af84714
commit b5cd082e43
1 changed files with 31 additions and 1 deletions
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32
qutebrowser/config/config.py
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@ -252,6 +252,25 @@ def init(parent=None):
_init_misc()
def _get_value_transformer(old, new):
"""Get a function which transforms a value for CHANGED_OPTIONS.
Args:
old: The old value - if the supplied value doesn't match this, it's
returned untransformed.
new: The new value.
Return:
A function which takes a value and transforms it.
"""
def transformer(val):
if val == old:
return new
else:
return val
return transformer
class ConfigManager(QObject):
"""Configuration manager for qutebrowser.
@ -263,6 +282,10 @@ class ConfigManager(QObject):
RENAMED_SECTIONS: A mapping of renamed sections, {'oldname': 'newname'}
RENAMED_OPTIONS: A mapping of renamed options,
{('section', 'oldname'): 'newname'}
CHANGED_OPTIONS: A mapping of arbitrarily changed options,
{('section', 'option'): callable}.
The callable takes the old value and returns the new
one.
DELETED_OPTIONS: A (section, option) list of deleted options.
Attributes:
@ -304,6 +327,8 @@ class ConfigManager(QObject):
('colors', 'tabs.separator'),
('colors', 'completion.item.bg'),
]
CHANGED_OPTIONS = {
}
changed = pyqtSignal(str, str)
style_changed = pyqtSignal(str, str)
@ -462,10 +487,15 @@ class ConfigManager(QObject):
for k, v in cp[real_sectname].items():
if k.startswith(self.ESCAPE_CHAR):
k = k[1:]
if (sectname, k) in self.DELETED_OPTIONS:
return
elif (sectname, k) in self.RENAMED_OPTIONS:
if (sectname, k) in self.RENAMED_OPTIONS:
k = self.RENAMED_OPTIONS[sectname, k]
if (sectname, k) in self.CHANGED_OPTIONS:
func = self.CHANGED_OPTIONS[(sectname, k)]
v = func(v)
try:
self.set('conf', sectname, k, v, validate=False)
except configexc.NoOptionError: