Bug 60997 - TextBox renders it's content improperly
Summary: TextBox renders it's content improperly
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: master
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2017-12-06 09:38 UTC by Arsen.Shnurkov
Modified: 2017-12-06 12:58 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
example code to reproduce the problem (2.94 KB, text/x-csharp)
2017-12-06 09:38 UTC, Arsen.Shnurkov
Details
Patch for libgdiplus (806 bytes, patch)
2017-12-06 12:58 UTC, Arsen.Shnurkov
Details


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Status:
NEW

Description Arsen.Shnurkov 2017-12-06 09:38:12 UTC
Created attachment 25921 [details]
example code to reproduce the problem

StringFormatFlags.MeasureTrailingSpaces flag is not added during text rendering
at lines 
https://github.com/mono/mono/blob/master/mcs/class/System.Windows.Forms/System.Windows.Forms/TextBoxTextRenderer.cs#L62
and the same for
sf_printing

Russian letter 'Р' have code 0x0420 (you see - it ends with 0x20 byte).

This code fragment remove part of this letter - 
https://github.com/mono/libgdiplus/blob/master/src/text-cairo.c#L239-L244
what results is wrong calculation of text length, and wrong rendering of text and cursor position.
Comment 1 Arsen.Shnurkov 2017-12-06 12:58:18 UTC
Created attachment 25922 [details]
Patch for libgdiplus