Bug 381593

You are using a somewhat old version.  Do you have a simple way of testing the issue and screenshots?

I don't have latest version (still on 4.x) but none of consoles - either text mode or in X/Desktops support displaying Indian languages properly. This is case with all terminal emulators in Linux desktops.
This require some change in semantics of terminal emulation and rendering to properly show complex text characters.

Affects the latest version of Konsole too (version 21.12.3). Please find some screenshots attached.

Created attachment 148063 [details]
The cursor is offset too much from the end of the Bengali text

(In reply to Puspam Adak from comment #4)
> Created attachment 148063 [details]
> The cursor is offset too much from the end of the Bengali text

Can you please include the exact character string that is displayed in the image, and which font you use?

I see something similar when I use Hebrew characters with a font that has no such characters, and fontconfig uses characters from another font with a different width.

I guess that the solution is to display the characters in their place, one a t a time, instead of using drawText to draw multiple characters at a time.

> Can you please include the exact character string that is displayed in the image
চলে যেতে যেতে দিন বলে যায়
> which font you use?
Source Code Pro

> I guess that the solution is to display the characters in their place, one a
> t a time, instead of using drawText to draw multiple characters at a time.
You are right. I can see that the Bengali characters are not placed on separate blocks even when they are not joined (for example Bengali digits).

A possibly relevant merge request was started @ https://invent.kde.org/utilities/konsole/-/merge_requests/722

Git commit 76f879cd70fb494ab2334d2660b34679546f3d9d by Kurt Hindenburg, on behalf of Matan Ziv-Av.
Committed on 26/08/2022 at 19:24.
Pushed by hindenburg into branch 'master'.

Draw characters in exact positions

QT can't be made to draw monospaced text (if the font does not cooperate),
so avoid combining characters, using a QPainter::drawText() call for each
character.

For bidi text support this change requires konsole to reorder and reshape
the characters. This is done using the ICU library (which QT also uses).

This change allows for some improvements related to text rendering:

- More precise bidi reordering, which is no longer changed by characters'
  attributes and selection.
- underlines drawn separately from the text, allowing for differing
  underline modes (double, curly, dashed, dotted, colored).
- Overriding font for emoji characters.

This commit fixes a few bugs and addresses a lot more:

Feature requests: More standard conforming RTL and various underlines:
Related: bug 403729, bug 387811, bug 416508, bug 452087, bug 425973, bug 430822, bug 442742, bug 441037, bug 430822, bug 440070, bug 450017, bug 445846, bug 453086, bug 451716

Using non-monospace font:



Emoji:

Regression: devanagari rendering

M  +2    -0    CMakeLists.txt
M  +1    -0    src/CMakeLists.txt
M  +47   -25   src/FontDialog.cpp
M  +2    -1    src/FontDialog.h
M  +127  -23   src/Screen.cpp
M  +18   -5    src/Screen.h
M  +28   -13   src/Vt102Emulation.cpp
M  +0    -29   src/autotests/CharacterTest.cpp
M  +0    -1    src/autotests/CharacterTest.h
M  +1    -1    src/autotests/TerminalCharacterDecoderTest.cpp
M  +119  -29   src/characters/Character.h
M  +1    -1    src/characters/Hangul.cpp
M  +5    -4    src/decoders/HTMLDecoder.cpp
M  +1    -1    src/decoders/PlainTextDecoder.cpp
M  +3    -0    src/profile/Profile.cpp
M  +29   -0    src/profile/Profile.h
M  +101  -6    src/terminalDisplay/TerminalDisplay.cpp
M  +7    -0    src/terminalDisplay/TerminalDisplay.h
M  +42   -0    src/terminalDisplay/TerminalFonts.cpp
M  +12   -0    src/terminalDisplay/TerminalFonts.h
M  +542  -269  src/terminalDisplay/TerminalPainter.cpp
M  +40   -13   src/terminalDisplay/TerminalPainter.h
M  +2    -0    src/widgets/EditProfileAdvancedPage.ui
M  +113  -3    src/widgets/EditProfileAppearancePage.ui
M  +61   -3    src/widgets/EditProfileDialog.cpp
M  +6    -1    src/widgets/EditProfileDialog.h

https://invent.kde.org/utilities/konsole/commit/76f879cd70fb494ab2334d2660b34679546f3d9d

Let us know if you still have this issue on recent version

(In reply to Kurt Hindenburg from comment #9)
> Let us know if you still have this issue on recent version

Let me know which specific version to test? Would it suffice to test on Kubuntu 23.10 ? it has Plasma 5.27 .
My debian has older konsole 20.12.3.

Dear Bug Submitter,

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no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
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If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!