forked from mirrors/gecko-dev
36 lines
1.7 KiB
ReStructuredText
36 lines
1.7 KiB
ReStructuredText
Form Autofill Heuristics
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========================
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Form Autofill Heuristics module is for detecting the field type based on `autocomplete attribute <https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#autofill>`_, `the regular expressions <http://searchfox.org/mozilla-central/source/browser/extensions/formautofill/content/heuristicsRegexp.js>`_ and the customized logic in each parser.
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Debugging
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---------
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The pref ``extensions.formautofill.heuristics.enabled`` is "true" in default. Set it to "false" could be useful to verify the result of autocomplete attribute.
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Dependent APIs
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--------------
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``element.getAutocompleteInfo()`` provides the parsed result of ``autocomplete`` attribute which includes the field name and section information defined in `autofill spec <https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#autofill>`_
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Regular Expressions
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-------------------
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This section is about how the regular expression is applied during parsing fields. All regular expressions are in `heuristicsRegexp.js <https://searchfox.org/mozilla-central/source/browser/extensions/formautofill/content/heuristicsRegexp.js>`_.
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Parser Implementations
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----------------------
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The parsers are for detecting the field type more accurately based on the near context of a field. Each parser uses ``FieldScanner`` to traverse the interested fields with the result from the regular expressions and adjust each field type when it matches to a grammar.
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* _parsePhoneFields
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* related type: ``tel``, ``tel-*``
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* _parseAddressFields
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* related type: ``address-line[1-3]``
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* _parseCreditCardExpirationDateFields
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* related type: ``cc-exp``, ``cc-exp-month``, ``cc-exp-year``
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