Firefox附加组件：添加具有不同URL和建议的搜索引擎

Question

my Firefox addon shall add a search engine, that

• provides suggestions
• gets its search template URL specified on runtime (ie: template URL depends on the preferences of the user)

And I don't see a way to do both at the same time.

I see two options to add a search engine:

• addEngineWithDetails
• addEngine

addEngineWithDetails() allows me to add a search engine with the template URL. But it does (apparently?) not allow to provide a suggestions URL.

addEngine() allows me to add a search engine that is specified in an XML file. But if have that file saved locally in my addon directory (eg chrome://example-engine/content/search.xml ), how can I change the template URL on runtime? And using an online XML is an unsafe options since the internet connection could be broken or bad during the addon install.

Answer 1

First fo all, you're right, addEngineWithDetails does not support suggestions.

The way to go would be to use addEngine (and removeEngine ).

As for the "dynamic" part of your question: While I didn't test it, the implementation seems to happily accept data: URIs . So you could:

• Construct a data URI using whatever methods you like (even constructing a full XML DOM and serializing it).
• Call addEngine with the data URI.
• When the user changes a pref, remove the old engine, and construct a new one.