Created attachment 112785 [details] [review]
GWeatherLocationEntry, work-in-progress

The attached patch creates a GWeatherLocationEntry, which is a GtkEntry with a GtkEntryCompletion using the Locations.xml data. So you can type "atl", and it will show:

    Atlanta (De Kalb-Peachtree Airport), Georgia, United States
    Atlanta (Fulton County Airport), Georgia, United States
    Atlanta (Hartsfield Airport), Georgia, United States
    Atlanta (Peachtree City), Georgia, United States
    Atlantic City (Atlantic City), New Jersey, United States
    Atlantic, Iowa, United States

(The double "Atlantic City" is a bug.)

Or you can type "india", and it will show:

    Ahmadabad, India
    Amritsar, India
    Andersen, Indiana, United States
    Bangalore/Hindustan, India
    Bloomington, Indiana, United States
    ...

which obviously needs to be sorted differently, but it at least shows the idea; people can try entering a city name first, and if there are no matches for it, they can try entering a region or country name instead.

Combined with the stuff in bug 527592 to sort <location>s within a <city> by distance from the city center, this would also implicitly fix bug 527593.

Besides the sorting fixes, another obvious improvement would be to make the completion recognize well-known abbreviations (eg, postal abbreviations for states/provinces, or words like "Saint", "Fort", "West", etc that are sometimes abbreviated in city names and sometimes not).

(This patch overlaps with the patch in bug 529054)

committed