QuickNav Text paragraph navigation (#16031)
Closes #15998
Summary of the issue:
Add QuickNav text paragraph navigation
Description of user facing changes
Added QuickNav gesture p to jump to next/previous text paragraph in browse mode.
Description of development approach
In BrowseModeTreeInterceptor added function _iterSimilarParagraph that finds next/previous paragraph that satisfies condition defined by a lambda function. I will reuse this function in later PRs to implement vertical navigation.
Added a new clause in BrowseModeTreeInterceptor._quickNavScript() that handles text paragraph case and calls function defined in the previous bullet.
For text criteria I ended up implementing a user configurable regex.
Its initial value is defined in DEFAULT_TEXT_PARAGRAPH_REGEX variable in configSpec.py:11.
It is user-configurable in Browse Mode page in NVDA options.
The rationale for using a regex instead of plain-text search is to reduce the number of false positives.
For example, for period character we check that it follows a word character \w and is followed by space character or end of string. There are a few more rules for edge cases in the code.
I don't include comma, colon and semicolon punctuation marks in the regex due to high number of false positives.
The regex also accounts for CJK languages by checking for full-width punctuation marks.
