D8800: Add a new function to measure the length by text.

[Xuetian Weng]

xuetianweng created this revision.
xuetianweng added reviewers: hein, apol.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  CJK language contains more information per character. When people try to
  write code to cap the user input by length, ususally it makes more sense
  to loose limit for CJK strings. In real life, twitter now also employs
  similar algorithm to make tweet length 280 in latin or 140 in CJK characters.

TEST PLAN
  unit test.

REPOSITORY
  R244 KCoreAddons

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8800

AFFECTED FILES
  autotests/kstringhandlertest.cpp
  autotests/kstringhandlertest.h
  src/lib/text/kstringhandler.cpp
  src/lib/text/kstringhandler.h

To: xuetianweng, hein, apol
Cc: #frameworks
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