[Akonadi] [Bug 308952] Messages disappear after folder rename

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=308952

--- Comment #8 from Kjetil Kilhavn  ---
The problem appears to have been fixed, but I can only speak for my own
configuration which is KMail 5.1.3 / Frameworks 5.21 / Plasma 5.5.5 / Qt 5.5.1
in openSUSE Leap 42.1,

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #6 from Kjetil Kilhavn  ---
Created attachment 98415
  --> https://bugs.kde.org/attachment.cgi?id=98415=edit
Window screenshot of message in separate window (for easier recreation of same
window size)

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #5 from Kjetil Kilhavn  ---
Created attachment 98414
  --> https://bugs.kde.org/attachment.cgi?id=98414=edit
Message displayed as HTML with external resources

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #4 from Kjetil Kilhavn  ---
Created attachment 98413
  --> https://bugs.kde.org/attachment.cgi?id=98413=edit
Message displayed as HTML without external resources (bottom of message)

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #3 from Kjetil Kilhavn  ---
Created attachment 98412
  --> https://bugs.kde.org/attachment.cgi?id=98412=edit
Message displayed as HTML without external resources (top of message)

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #2 from Kjetil Kilhavn  ---
Created attachment 98411
  --> https://bugs.kde.org/attachment.cgi?id=98411=edit
Message displayed as plain text (default in my configuration)

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[kmail2] [Bug 361834] Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

--- Comment #1 from Kjetil Kilhavn  ---
Created attachment 98410
  --> https://bugs.kde.org/attachment.cgi?id=98410=edit
Message that caused the erratic behaviour

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[kmail2] [Bug 361834] New: Incorrect calculation of repaint region when message display pane is close to requiring scroll bars?

[Kjetil Kilhavn via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361834

Bug ID: 361834
   Summary: Incorrect calculation of repaint region when message
display pane is close to requiring scroll bars?
   Product: kmail2
   Version: 5.1.3
  Platform: openSUSE RPMs
OS: Linux
Status: UNCONFIRMED
  Severity: normal
  Priority: NOR
 Component: UI
  Assignee: kdepim-bugs@kde.org
  Reporter: kje...@kilhavn.no

An email message that in its HTML form contains a background image which is an
external resource leads to a display anomaly when loading external resources.
The problem occurs only for specific window sizes, so I suspect it is related
to calculation of the region that must be repainted.

I accidentally discovered that if I turn on display of message structure
(displayed below message pane) the problem does not occur! So I experimented a
little more with the message opened in a separate window and discovered that
the problem did not occur then either. However; it turns out that it depends on
the window size - so when changed the size of the separate message window to
match the message area size in KMail the problem occurred again. It did not
occur for a smaller window, nor for a larger window. 
I suspect that with a larger screen I would be able to reproduce the problem
also with the message structure displayed.

Reproducible: Always

Steps to Reproduce:
If required, change KMail settings to display plain text email by default and
display HTML status bar in message window before attempting to reproduce the
problem.

1. Load attached message into KMail
2. Switch to HTML version
3. Load external resources

Actual Results:  
The right edge of the window (where the scroll bar was before loading external
resources) is not repainted correctly. It shows the mail header and parts of
the background - from the size distortion it seems there is an initial
rendering run, and the scroll bar area shows the result of this rendering.

Expected Results:  
The message should have displayed without a strange artefact in the scrollbar
area.

I am setting the severity to Normal instead of Minor because I hope there can
also be some performance gained from fixing this bug - assuming a fix leads to
a 50% reduction in rendering runs (from 2 to 1).

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