D23151: Implement Web Share API through Purpose

[Kai Uwe Broulik]

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

REVISION SUMMARY
  This implements Web Share API Level 1 [1] through Purpose and also adds a generic "Share..." context menu entry.
  It can be tested on [2].
  
  [1] https://w3c.github.io/web-share/
  [2] https://w3c.github.io/web-share/demos/share.html

TEST PLAN
  - Successfully shared a tweet via E-Mail on Twitter's mobile site (unfortunately the Desktop site doesn't make use of it)
  - Sending to KDE Connect works
  - Verified that calling it without user interaction isn't possible
  
  F7246859: Screenshot_20190814_131126.png <https://phabricator.kde.org/F7246859>
  F7246860: Screenshot_20190814_131148.png <https://phabricator.kde.org/F7246860>
  I couldn't figure out how to pass both a title and contents simultaneously to it since it seems to abuse the "urls" field for all kinds of random purposes like email *body*.
  
  The browser context menu also gets a "Share..." entry where you can share whatever page, link, image, video, etc you're pointing at. Unfortunately, when both this and KDE Connect Devices are present, you now get a "Plasma Browser Integration" sub menu with both entries in it.

REPOSITORY
  R856 Plasma Browser Integration

REVISION DETAIL
  https://phabricator.kde.org/D23151

AFFECTED FILES
  CMakeLists.txt
  extension/_locales/en/messages.json
  extension/constants.js
  extension/content-script.js
  extension/extension-purpose.js
  extension/manifest.json
  extension/options.html
  host/CMakeLists.txt
  host/main.cpp
  host/purposeplugin.cpp
  host/purposeplugin.h

To: broulik, #plasma, fvogt, davidedmundson, nicolasfella, apol
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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