On Sep 20, 2007, at 2:47 PM, Jim DeVona wrote:
Is it possible to use a "whose" clause to get only items of a certain
type from a list of Yojimbo database items?
It sounds like an innocently easy question. But I'm afraid there is
no easy, generally applicable answer.
In the case that you want to access an single item class directly,
your best bet is to use a whose clause against that item class, such
as 'every bookmark item whose <xxx>'.
Here is an example
intended to get any selected bookmark items:
tell application "Yojimbo"
set _items to selected items of browser window 1
if _items is missing value then return
set _bookmarks to every item of _items whose class is bookmark item
end tell
The bookmarks line gives this error: 'Can't get {bookmark item id
"D0303DFD-C8B1-4F17-BD0E-EAD40018D3A1" of application "Yojimbo"} whose
class = bookmark item.' I suspect I am either grossly off track or
nearly there. Any guidance?
The selected items property returns a list of object specifiers. I'm
not sure there is a good way to filter that list using a whose
clause. (If there is, someone please clue me in.)
If you are iterating the list to do work, you could filter the list
as you go and only perform work on the items with the appropriate
class. Or you could write a handler to fetch and filter the selected
items by class for you. Here's an example:
on GetSelectedItemsOfClass(zItemClass)
tell application "Yojimbo"
set zSelectedItems to selected items of browser window 1
if zItemClass is database item then
set zFilteredItems to zSelectedItems
else
set zFilteredItems to {}
set zCount to length of zSelectedItems
repeat with i from 1 to zCount
set zItem to item i of zSelectedItems
if class of zItem is zItemClass then
set zFilteredItems to zFilteredItems &
{zItem}
end if
end repeat
end if
return zFilteredItems
end tell
end GetSelectedItemsOfClass
tell application "Yojimbo"
my GetSelectedItemsOfClass(bookmark item)
end tell
- Jim
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