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Re: A patch for enforcing double-width CJK character display
From: |
Eli Zaretskii |
Subject: |
Re: A patch for enforcing double-width CJK character display |
Date: |
Thu, 12 Apr 2012 17:27:18 +0300 |
> Date: Thu, 12 Apr 2012 19:18:39 +0800
> From: 黄建忠 <address@hidden>
> CC: address@hidden, address@hidden
>
> >> Can anybody provide a clue how to catch the new width of default font
> >> via FRAME_PTR when scale happened?
> > I don't think there is a way to do that, if all you have is the frame
> > pointer. text-scale-mode does not modify the frame's default font, it
> > remaps the 'default' face to another face which specifies a larger or
> > a smaller font. So the way to find the width of the font after
> > scaling is to get hold of the font itself, or of the face to which
> > 'default' was remapped. Then you can use FONT_WIDTH, I think (but I
> > didn't test this).
> I can get the default font(the first font loaded when frame be
> initialized) via FRAME_FONT, it's great that it can not be changed after
> first font loaded.
> But I still can not get the current width after scale, since the props
> of FRAME_FONT also not be changed.
> [...]
> I noticed there were some global Lisp_Object such as
> "f_Vface_font_rescale_alist"/"f_Vface_remapping_alist"/"f_Vface_new_frame_defaults",
>
> maybe I can use them, Hope so.
This will retrieve the numerical ID of the default face on frame F:
int id = lookup_basic_face (F, DEFAULT_FACE_ID);
lookup_basic_face consults f_Vface_remapping_alist. If the value of
id above is different from DEFAULT_FACE_ID, that means the default
face was remapped. Then you can get the remapped face like this:
struct face *face = FACE_FROM_ID (F, id);
Now the font of the face is available as
struct font *font = face->font;
And I think FONT_WIDTH (font) will give you the width you want to use
instead of FRAME_COLUMN_WIDTH.
Again, this is 100% untested. Good luck!
- Re: A patch for enforcing double-width CJK character display, Kan-Ru Chen, 2012/04/11
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/11
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/12
- Re: A patch for enforcing double-width CJK character display, Eli Zaretskii, 2012/04/12
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/12
- Re: A patch for enforcing double-width CJK character display,
Eli Zaretskii <=
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/12
- Re: A patch for enforcing double-width CJK character display, Stefan Monnier, 2012/04/12
- Message not available
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/13
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/13
- Message not available
- Re: A patch for enforcing double-width CJK character display, Stefan Monnier, 2012/04/13
- Re: A patch for enforcing double-width CJK character display, Miles Bader, 2012/04/15
- Re: A patch for enforcing double-width CJK character display, William Xu, 2012/04/15
- Re: A patch for enforcing double-width CJK character display, Miles Bader, 2012/04/15
- Re: A patch for enforcing double-width CJK character display, 黄建忠, 2012/04/15
- Re: A patch for enforcing double-width CJK character display, Miles Bader, 2012/04/16