[BUG] Verical Edge Incorrect

[CalvinsPal]

Is there an existing issue for this?

• I have searched the existing issues

Description of the Issue

Vertical edge is displaying @ incorrect location

Steps To Reproduce

Define a position in the preferences->margin section->Vertical edge settings

Current Behavior

Vertical edge set to 80 is displaying @ 40

Expected Behavior

Display @ 80

Debug Information

Notepad++ v8.6.5   (64-bit)
Build time : Mar 29 2024 - 17:04:43
Path : C:\Program Files\Notepad++\notepad++.exe
Command Line : "C:\Users\hauss\AppData\Roaming\Mozilla\Firefox\Profiles\s4emb6yl.default-release-1670182444794\gmp-widevinecdm\4.10.2710.0\LICENSE.txt"
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
Periodic Backup : OFF
OS Name : Windows 11 Home (64-bit
OS Version : 23H2
OS Build : 22631.3447
Current ANSI codepage : 1252
Plugins : 
    mimeTools (3.1)
    NppConverter (4.6)
    NppExport (0.4)

Anything else?

[rdipardo]

The code that draws the vertical edge makes two assumptions:

1. every character is ASCII, i.e., 1 character = 1 byte. See how multi-byte Unicode text is also not aligned (by exceeding the limit):

   

2. the active font is monospaced, i.e., every character takes up the same amount of screen room. The font in the original screen capture looks to be proportional, i.e. variable-width (e.g. Arial)

[alankilborn]

Also discussed on the Community here: https://community.notepad-plus-plus.org/topic/25737

[CalvinsPal]

@rdipardo That makes sense. However, with the font face changed to a monospace font; the vertical edge only moves a few spaces/characters.

[alankilborn]

@CalvinsPal As a baseline, why don't you give "Courier New" font a try?