Update backgrounds.xml without creating duplicate entries

Registered by Marc Stewart

The wallpaper list, ~/.gnome2/backgrounds.xml, is currently updated by appending the new wallpaper to the end of the list. This works because gnome-appearance-properties (presumably) clears up any duplicate entries. That behaviour should not be relied upon, however. The wallpaper list should instead be scanned for a matching wallpaper filename and, if located, replaced with the new details, with a new entry only created when it is genuinely new.

Blueprint information

Status:
Not started
Approver:
Marc Stewart
Priority:
High
Drafter:
Marc Stewart
Direction:
Needs approval
Assignee:
None
Definition:
Approved
Series goal:
Accepted for 0.9
Implementation:
Not started
Milestone target:
milestone icon 0.9.9

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