[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Kurt Hindenburg]

https://bugs.kde.org/show_bug.cgi?id=361547

Kurt Hindenburg  changed:

   What|Removed |Added

  Latest Commit||https://commits.kde.org/kon
   ||sole/a565bc97337a3bfc3a027f
   ||46aa2dec3e9a6f8618
 Resolution|--- |FIXED
 Status|CONFIRMED   |RESOLVED

--- Comment #6 from Kurt Hindenburg  ---
Git commit a565bc97337a3bfc3a027f46aa2dec3e9a6f8618 by Kurt Hindenburg, on
behalf of Mariusz Glebocki.
Committed on 03/04/2018 at 00:11.
Pushed by hindenburg into branch 'master'.

Clip character drawing to its own cell

Summary:
To calculate string width, Konsole uses character cell widths.
Rendering engine uses actual characters widths for this purpose.
Those sizes are equal in fixed-width fonts, as long as the font
has specific character. Since no font contains all Unicode characters,
some of them are taken from different fonts and their sizes differ
from their cell size. This can lead to different results depending
on how text line is split into strings.

It can be assumed that characters in Basic Latin block in every
fixed-width font are really fixed-width, and can be rendered as one
string. All other characters are rendered separately, and their
rendering surface is limited to their cell.

Before/After screenshots:
{F5749612}

Test Plan:
Paste this: `⸻test` in konsole and highlight different parts of the string

In a text editor paste this:
```
| A |
| ⸻ |
| ⟹ |
| ⧠ |
```
and move cursor vertically through characters column

Reviewers: #konsole, hindenburg

Reviewed By: #konsole, hindenburg

Subscribers: hindenburg, ngraham, #konsole

Tags: #konsole

Differential Revision: https://phabricator.kde.org/D11237

M  +33   -28   src/TerminalDisplay.cpp

https://commits.kde.org/konsole/a565bc97337a3bfc3a027f46aa2dec3e9a6f8618

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=361547

Nate Graham  changed:

   What|Removed |Added

 CC||n...@kde.org

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Kurt Hindenburg]

https://bugs.kde.org/show_bug.cgi?id=361547

Kurt Hindenburg  changed:

   What|Removed |Added

 Status|UNCONFIRMED |CONFIRMED
 Ever confirmed|0   |1

--- Comment #5 from Kurt Hindenburg  ---
yes, Konsole has had this issue for quite a while

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=361547

christian.her...@astro.su.se changed:

   What|Removed |Added

 CC||christian.her...@astro.su.s
   ||e

--- Comment #4 from christian.her...@astro.su.se ---
Easily reproducible.   Please change status to confirmed!

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Randall Leeds]

https://bugs.kde.org/show_bug.cgi?id=361547

Randall Leeds  changed:

   What|Removed |Added

 CC||randall.le...@gmail.com

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=361547

Christoph Feck  changed:

   What|Removed |Added

 CC||kde-2011...@dotancohen.com

--- Comment #3 from Christoph Feck  ---
*** Bug 297390 has been marked as a duplicate of this bug. ***

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=361547

--- Comment #2 from Christoph Feck  ---
*** Bug 375835 has been marked as a duplicate of this bug. ***

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[konsole] [Bug 361547] Unicode text changes size and moves around when moving cursor

[Geoff Streeter via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=361547

Geoff Streeter  changed:

   What|Removed |Added

 CC||ge...@streeter.gr

--- Comment #1 from Geoff Streeter  ---
I also see this. Use the following two lines:
¹⁰ ① fails, ② succeeds, ③ fails
¹¹ ① fails, ② succeeds, ③ fails

Place the caret on the first character and move it right, down, left, up. I am
using Monospace size 16  as font. I suspect problems when rendering ①②③ as I
don't think the font is truly monospace for these.

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