[Marble-bugs] [marble] [Bug 351325] New: Placemark localization for (OSM) vector rendering
Dennis Nienhüser
nienhueser at kde.org
Sat Aug 15 12:41:10 UTC 2015
https://bugs.kde.org/show_bug.cgi?id=351325
Bug ID: 351325
Summary: Placemark localization for (OSM) vector rendering
Product: marble
Version: unspecified
Platform: Other
URL: https://wiki.openstreetmap.org/wiki/Multilingual_names
OS: Linux
Status: UNCONFIRMED
Keywords: google-code-in, junior-jobs
Severity: task
Priority: NOR
Component: general
Assignee: marble-bugs at kde.org
Reporter: nienhueser at kde.org
In OpenStreetMap names of places are usually denoted in the local language.
Variants of a name translated into other languages can be added. In most
situations it is desirable to display the name in the local language of the
viewer of the map, not the local language of the placemark.
For example, the following placemark exists in Budapest:
name => Magyar Nemzeti Bank
name:de => Ungarische Nationalbank
name:en => Hungarian National Bank
name:es => Banco Nacional de Hungría
name:fr => Banque nationale hongroise
On a device with a hungarian locale (QLocale::system::uiLanguages() reports
some 'hu' variant), the placemark should be displayed as "Magyar Nemzeti Bank".
A German system should display "Ungarische Nationalbank". For an italian system
a proper translation is missing, but it might be preferrable to display the
english variant "Hungarian National Bank" instead of the local one.
To implement this, we need to
- determine the language code of the placemark: Which country do the
placemark's coordinates belong to, what is its locale?
- come up with a list of acceptable display locales. This can likely be
extracted from QLocale::system::uiLanguages(), which already includes a
preference order.
- Choose the best (in order of preference) translation alternative and display
that
Re-using the example above and an italian device, this might result in
- language code of the placemark: 'hu'
- acceptable display locales: ('it', 'en', 'es')
- mapping: ('it' => N/A, 'en' => 'Hungarian National Bank', 'es' => 'Banco
Nacional de Hungría')
- the displayed name would become 'Hungarian National Bank' as the most
preferred variant
If no mapping is found (e.g. for a chinese device that only reports ('zh') as
acceptable locales), the original name should be chosen.
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