D21112: Support message response and reply callbacks

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, fvogt.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  This allows to make use of the sendReply/sendResponse callbacks allowing for the callee to reply directly without having to manually track state and relate a message to a reply.
  Also add a bit of documentation on the required callback signature.

TEST PLAN
  Sent a message with a callback, replied, got reply in callback.
  Returned true from a callback and stored the callback in a variable, did some processing, replied successfully at a later point.

REPOSITORY
  R856 Plasma Browser Integration

REVISION DETAIL
  https://phabricator.kde.org/D21112

AFFECTED FILES
  extension/content-script.js
  extension/extension.js
  extension/options.js

To: broulik, #plasma, fvogt
Cc: plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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