[ubuntu-mono] [Bug 1577241] [NEW] Sys.Drawing.SystemFonts does not return UI fonts being used in system

[Mingye Wang]

Public bug reported:

The current mono implementation of System.Drawing.SystemFonts is hard-
coded to return "Microsoft Sans Serif" and "Tahoma" for system font
queries. Even though this matches MSDN-documented values for Windows,
this violates the intended semantics of this class, and produces
surprises for cross-platform Winforms developers.

With fontconfig usage in libgdiplus, a quick and (kind of) dirty fix is to replace them with "Sans" (or "Ubuntu" if you want to.) A more MSDN-friendly solution[1] is to return GenericSansSerif directly, however this ends up pointing to libgdiplus's implementation which ends up giving MS Sans Serif too.
  [1]: https://msdn.microsoft.com/en-us/library/system.drawing.systemfonts.defaultfont(v=vs.110).aspx

A related workaround in fontconfig is to alias Microsoft Sans Serif to
Helvetica in 30-metric-aliases.conf (fd.o 95232). This should at least
solve the issue that fontconfig most likely knows nothing about matching
"Microsoft Sans Serif".

** Affects: mono
     Importance: Unknown
         Status: Unknown

** Affects: mono (Ubuntu)
     Importance: Undecided
         Status: New

** Bug watch added: bugzilla.xamarin.com/ #40791
   http://bugzilla.xamarin.com/show_bug.cgi?id=40791

** Also affects: mono via
   http://bugzilla.xamarin.com/show_bug.cgi?id=40791
   Importance: Unknown
       Status: Unknown

** Description changed:

  The current mono implementation of System.Drawing.SystemFonts is hard-
  coded to return "Microsoft Sans Serif" and "Tahoma" for system font
  queries. Even though this matches MSDN-documented values for Windows,
- this violates the intended semantics of this class.
+ this violates the intended semantics of this class, and produces
+ surprises for cross-platform Winforms developers.
  
  With fontconfig usage in libgdiplus, a quick and (kind of) dirty fix is to replace them with "Sans" (or "Ubuntu" if you want to.) A more MSDN-friendly solution[1] is to return GenericSansSerif directly, however this ends up pointing to libgdiplus's implementation which ends up giving MS Sans Serif too.
-   [1]: https://msdn.microsoft.com/en-us/library/system.drawing.systemfonts.defaultfont(v=vs.110).aspx
+   [1]: https://msdn.microsoft.com/en-us/library/system.drawing.systemfonts.defaultfont(v=vs.110).aspx
  
  A related workaround in fontconfig is to alias Microsoft Sans Serif to
  Helvetica in 30-metric-aliases.conf (fd.o 95232).

** Description changed:

  The current mono implementation of System.Drawing.SystemFonts is hard-
  coded to return "Microsoft Sans Serif" and "Tahoma" for system font
  queries. Even though this matches MSDN-documented values for Windows,
  this violates the intended semantics of this class, and produces
  surprises for cross-platform Winforms developers.
  
  With fontconfig usage in libgdiplus, a quick and (kind of) dirty fix is to replace them with "Sans" (or "Ubuntu" if you want to.) A more MSDN-friendly solution[1] is to return GenericSansSerif directly, however this ends up pointing to libgdiplus's implementation which ends up giving MS Sans Serif too.
    [1]: https://msdn.microsoft.com/en-us/library/system.drawing.systemfonts.defaultfont(v=vs.110).aspx
  
  A related workaround in fontconfig is to alias Microsoft Sans Serif to
- Helvetica in 30-metric-aliases.conf (fd.o 95232).
+ Helvetica in 30-metric-aliases.conf (fd.o 95232). This should at least
+ solve the issue that fontconfig most likely knows nothing about matching
+ "Microsoft Sans Serif".

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https://bugs.launchpad.net/bugs/1577241

Title:
  Sys.Drawing.SystemFonts does not return UI fonts being used in system

Status in mono:
  Unknown
Status in mono package in Ubuntu:
  New

Bug description:
  The current mono implementation of System.Drawing.SystemFonts is hard-
  coded to return "Microsoft Sans Serif" and "Tahoma" for system font
  queries. Even though this matches MSDN-documented values for Windows,
  this violates the intended semantics of this class, and produces
  surprises for cross-platform Winforms developers.

  With fontconfig usage in libgdiplus, a quick and (kind of) dirty fix is to replace them with "Sans" (or "Ubuntu" if you want to.) A more MSDN-friendly solution[1] is to return GenericSansSerif directly, however this ends up pointing to libgdiplus's implementation which ends up giving MS Sans Serif too.
    [1]: https://msdn.microsoft.com/en-us/library/system.drawing.systemfonts.defaultfont(v=vs.110).aspx

  A related workaround in fontconfig is to alias Microsoft Sans Serif to
  Helvetica in 30-metric-aliases.conf (fd.o 95232). This should at least
  solve the issue that fontconfig most likely knows nothing about
  matching "Microsoft Sans Serif".

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