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Use ProxyMetadata in formatter functions for virt libs, ondevice, book_size, and approximate_formats. This saves the assignment in get_metadata()

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This commit is contained in:
Charles Haley 2013-07-25 11:36:34 +02:00
parent 6a488a3320
commit 8467baea33
4 changed files with 44 additions and 22 deletions
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7
src/calibre/db/cache.py
View File

@ -214,8 +214,8 @@ class Cache(object):
default_value='dummy')
mi.title_sort = self._field_for('sort', book_id,
default_value=_('Unknown'))
mi.book_size = self._field_for('size', book_id, default_value=0)
mi.ondevice_col = self._field_for('ondevice', book_id, default_value='')
# mi.book_size = self._field_for('size', book_id, default_value=0)
# mi.ondevice_col = self._field_for('ondevice', book_id, default_value='')
mi.last_modified = self._field_for('last_modified', book_id,
default_value=n)
formats = self._field_for('formats', book_id)
@ -227,7 +227,7 @@ class Cache(object):
mi.format_metadata = FormatMetadata(self, book_id, formats)
good_formats = FormatsList(formats, mi.format_metadata)
mi.formats = good_formats
mi.db_approx_formats = formats
# mi.db_approx_formats = formats
mi.has_cover = _('Yes') if self._field_for('cover', book_id,
default_value=False) else ''
mi.tags = list(self._field_for('tags', book_id, default_value=()))
@ -1413,6 +1413,7 @@ class Cache(object):
def refresh_ondevice(self):
self.fields['ondevice'].clear_caches()
self.clear_search_caches()
self.clear_composite_caches()
@read_api
def tags_older_than(self, tag, delta=None, must_have_tag=None, must_have_authors=None):

4
src/calibre/db/lazy.py
View File

@ -355,4 +355,6 @@ class ProxyMetadata(Metadata):
um = ga(self, '_user_metadata')
return frozenset(ALL_METADATA_FIELDS.union(um.iterkeys()))
@property
def _proxy_metadata(self):
return self

2
src/calibre/gui2/library/models.py
View File

@ -453,7 +453,7 @@ class BooksModel(QAbstractTableModel): # {{{
def get_book_display_info(self, idx):
mi = self.db.get_metadata(idx)
mi.size = mi.book_size
mi.size = mi._proxy_metadata.book_size
mi.cover_data = ('jpg', self.cover(idx))
mi.id = self.db.id(idx)
mi.field_metadata = self.db.field_metadata

39
src/calibre/utils/formatter_functions.py
View File

@ -640,15 +640,22 @@ class BuiltinApproximateFormats(BuiltinFormatterFunction):
'although it probably is. '
'This function can be called in template program mode using '
'the template "{:\'approximate_formats()\'}". '
'Note that format names are always uppercase, as in EPUB.'
'Note that format names are always uppercase, as in EPUB. '
'This function works only in the GUI. If you want to use these values '
'in save-to-disk or send-to-device templates then you '
'must make a custom "Column built from other columns", use '
'the function in that column\'s template, and use that '
'column\'s value in your save/send templates'
)
def evaluate(self, formatter, kwargs, mi, locals):
fmt_data = mi.get('db_approx_formats', [])
if hasattr(mi, '_proxy_metadata'):
fmt_data = mi._proxy_metadata.db_approx_formats
if not fmt_data:
return ''
data = sorted(fmt_data)
return ','.join(v.upper() for v in data)
return _('This function can be used only in the GUI')
class BuiltinFormatsModtimes(BuiltinFormatterFunction):
name = 'formats_modtimes'
@ -902,27 +909,42 @@ class BuiltinBooksize(BuiltinFormatterFunction):
name = 'booksize'
arg_count = 0
category = 'Get values from metadata'
__doc__ = doc = _('booksize() -- return value of the size field')
__doc__ = doc = _('booksize() -- return value of the size field. '
'This function works only in the GUI. If you want to use this value '
'in save-to-disk or send-to-device templates then you '
'must make a custom "Column built from other columns", use '
'the function in that column\'s template, and use that '
'column\'s value in your save/send templates')
def evaluate(self, formatter, kwargs, mi, locals):
if mi.book_size is not None:
if hasattr(mi, '_proxy_metadata'):
try:
return str(mi.book_size)
v = mi._proxy_metadata.book_size
if v is not None:
return str(mi._proxy_metadata.book_size)
return ''
except:
pass
return ''
return _('This function can be used only in the GUI')
class BuiltinOndevice(BuiltinFormatterFunction):
name = 'ondevice'
arg_count = 0
category = 'Get values from metadata'
__doc__ = doc = _('ondevice() -- return Yes if ondevice is set, otherwise return '
'the empty string')
'the empty string. This function works only in the GUI. If you want to '
'use this value in save-to-disk or send-to-device templates then you '
'must make a custom "Column built from other columns", use '
'the function in that column\'s template, and use that '
'column\'s value in your save/send templates')
def evaluate(self, formatter, kwargs, mi, locals):
if mi.ondevice_col:
if hasattr(mi, '_proxy_metadata'):
if mi._proxy_metadata.ondevice_col:
return _('Yes')
return ''
return _('This function can be used only in the GUI')
class BuiltinSeriesSort(BuiltinFormatterFunction):
name = 'series_sort'
@ -1259,9 +1281,6 @@ class BuiltinVirtualLibraries(BuiltinFormatterFunction):
'column\'s value in your save/send templates')
def evaluate(self, formatter, kwargs, mi, locals_):
from calibre.db.lazy import ProxyMetadata
if isinstance(mi, ProxyMetadata):
return mi.virtual_libraries
if hasattr(mi, '_proxy_metadata'):
return mi._proxy_metadata.virtual_libraries
return _('This function can be used only in the GUI')