Some characters aren't always displayed

[Rikk]

This issue has been reported for Notepad++, but also happens here.

nO-OnE-910 commented 8 hours ago

I have a very strange issue with my npp when I try to put a ∈ [element of], ∘ [small circle] or ⌀ [average] in a document. These characters are only displayed when I put a ○ [large circle] or ⊥ [bottom] character in the same line behind them, otherwise they are just blank squares.
These are of course only the characters I tested, there are probably a lot more.

Here is a gif of the bug in action: (¬ ω π to show that only the 3 are affected)

I'm just putting in or removing the character, it changes instantly

Am I the only one with these issues?

Test it yourself by putting this in your npp:

∈
∘
⌀

∈ ○
∘ ○
⌀ ○

∈ ⊥
∘ ⊥
⌀ ⊥

edit: ℕ ℤ ℚ ℝ ℂ ℍ are also part of the displayed only sometimes crew

Interestingly, this also happens on notepad2 v4.2.25, notepad2-mod, but not on notepad2 v5.0.26-beta4 nor SciTE (original Scintilla editor).

[klonos]

I can reproduce this with r955

[XhmikosR]

Does the same happen with Scite?
On Jul 12, 2015 1:23 AM, "Ricardo" notifications@github.com wrote:

This issue has been reported for Notepad++
notepad-plus-plus/notepad-plus-plus#474, but
also happens here.

nO-OnE-910 commented 8 hours ago

I have a very strange issue with my npp when I try to put a ∈ [element
of], ∘ [small circle] or ⌀ [average] in a document. These characters are
only displayed when I put a ○ [large circle] or ⊥ [bottom] character in the
same line behind them, otherwise they are just blank squares.
These are of course only the characters I tested, there are probably a lot
more.

Here is a gif of the bug in action: (¬ ω π to show that only the 3 are
affected)
[image: gif]
https://camo.githubusercontent.com/4500b2789bf4212acb6490543f3c2b8affa623b0/687474703a2f2f692e696d6775722e636f6d2f716f48777766432e676966
I'm just putting in or removing the character, it changes instantly

Am I the only one with these issues?

Test it yourself by putting this in your npp:

∈
∘
⌀

∈ ○
∘ ○
⌀ ○

∈ ⊥
∘ ⊥
⌀ ⊥

edit: ℕ ℤ ℚ ℝ ℂ ℍ are also part of the displayed only sometimes crew

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Reply to this email directly or view it on GitHub
#121.

[Rikk]

Interestingly, this also happens on notepad2 v4.2.25, notepad2-mod, but not on notepad2 v5.0.26-beta4 nor SciTE (original Scintilla editor).

[XhmikosR]

So I guess it's been fixed upstream. Not sure if there's the source code available for Notepad2 beta but last time I checked it wasn't.

[bluenlive]

Do you believe in God?
In this world, there is one. The God is called Florian Balmer.

I asked this problem to The God, and The God answered as following...
I'll write a PR.

Hello

Notepad2 5.0.26-beta4 makes use of SC_TECHNOLOGY_DIRECTWRITE [0],
which seems to perform better font linking than the traditional
SC_TECHNOLOGY_DEFAULT mode, and may thus fix some GDI quirks? The same
problem seems to appear in Notepad2 5.0.26-beta4 if DirectWrite is
disabled [1].

[0] http://www.scintilla.org/ScintillaDoc.html#SCI_SETTECHNOLOGY
[1] http://www.flos-freeware.ch/development-releases/notepad2-FAQs.html#d2d-rendering

[Rikk]

@bluenlive thanks for having the initiative to contact him!

Btw, 5.0.26-beta4 also seems to improve anti-aliasing/cleartype, but it seems to have a problem in selecting and using some fonts, eg:

[zufuliu]

This bug not occurs when font is set to DejaVu Sans Mono (v2.3.7, https://dejavu-fonts.github.io/).

[zufuliu]

The unknown font bug @Rikk found has a temporary fix at https://sourceforge.net/p/scintilla/bugs/2027/.