Re: Trunk emacs infelicity with linum mode

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 10 Sep 2014 10:03:40 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: srivasta@ieee.org, emacs-devel@gnu.org
> 
>  >> The only way to change the coordinates from 10x10 to something else is
>  >> via adjust_frame_size.
>  >
>  > You are welcome to step through x_create_frame on Windows, after
>  > typing "C-x 5 2", and see how it avoids that.
> 
> Here, I get
> 
> (gdb) bt
> #0  adjust_frame_size (f=0x49b98a8, new_width=80, new_height=160, inhibit=5, pretend=true) at frame.c:390
> #1  0x0120420c in Fx_create_frame (parameters=...) at w32fns.c:4609

Is that in Fx_create_frame called because of "C-x 5 2"?  If so, it is
very strange, because I see something very different with the trunk
from a few days ago.  Please find below a GDB session stepping through
the code that should hopefully be self-explanatory.

======================================================================
(gdb) break Fx_create_frame
Breakpoint 3 at 0x120132f: file w32fns.c, line 4414.
(gdb) disable 3
(gdb) break Fredraw_display
Breakpoint 4 at 0x100805d: file dispnew.c, line 3023.
(gdb) r -Q
Starting program: d:\usr\eli\emacs\emacs-trunk_2014-09-01\src\emacs.exe -Q
Breakpoint 4, Fredraw_display () at dispnew.c:3023
3023      FOR_EACH_FRAME (tail, frame)
(gdb) enable 3
(gdb) c
Continuing.
Breakpoint 3, Fx_create_frame (parameters=117344758) at w32fns.c:4414
4414      int minibuffer_only = 0;
(gdb) until 4678
Fx_create_frame (parameters=117344750) at w32fns.c:4678
4678      adjust_frame_size (f, FRAME_TEXT_WIDTH (f), FRAME_TEXT_HEIGHT (f), 0, 1);
(gdb) s
adjust_frame_size (f=0x6feff78, new_width=640, new_height=560, inhibit=0,
    pretend=true) at frame.c:390
390       int unit_width = FRAME_COLUMN_WIDTH (f);
(gdb) n
391       int unit_height = FRAME_LINE_HEIGHT (f);
(gdb)
392       int old_pixel_width = FRAME_PIXEL_WIDTH (f);
(gdb) n
393       int old_pixel_height = FRAME_PIXEL_HEIGHT (f);
(gdb)
399       int windows_width = FRAME_WINDOWS_WIDTH (f);
(gdb)
400       int windows_height = FRAME_WINDOWS_HEIGHT (f);
(gdb)
403       struct window *r = XWINDOW (FRAME_ROOT_WINDOW (f));
(gdb)
404       int old_windows_width = WINDOW_PIXEL_WIDTH (r);
(gdb)
406         = (WINDOW_PIXEL_HEIGHT (r)
(gdb)
407            + (FRAME_HAS_MINIBUF_P (f)
(gdb) n
409               : 0));
(gdb)
407            + (FRAME_HAS_MINIBUF_P (f)
(gdb)
408               ? WINDOW_PIXEL_HEIGHT (XWINDOW (FRAME_MINIBUF_WINDOW (f)))
(gdb)
409               : 0));
(gdb)
405       int old_windows_height
(gdb)
411       int old_text_width = FRAME_TEXT_WIDTH (f);
(gdb) p old_windows_height
$1 = 577
(gdb) n
412       int old_text_height = FRAME_TEXT_HEIGHT (f);
(gdb)
414       int new_text_width = (new_width >= 0) ? new_width : old_text_width;
(gdb) p old_windows_width
$2 = 673
(gdb) n
415       int new_text_height = (new_height >= 0) ? new_height : old_text_height;
(gdb)
420       XSETFRAME (frame, f);
(gdb) p new_text_width
$3 = 640
(gdb) p new_text_height
$4 = 560
(gdb) p old_text_width
$5 = 640
(gdb) p old_text_height
$6 = 560
(gdb) n
424       min_windows_width = frame_windows_min_size (frame, Qt, Qt);
(gdb)
425       min_windows_height = frame_windows_min_size (frame, Qnil, Qt);
(gdb)
427       if (inhibit >= 2 && inhibit <= 4)
(gdb) p min_windows_width
$7 = 80
(gdb) p min_windows_height
$8 = 80
(gdb) n
441         inhibit_horizontal = inhibit_vertical = inhibit == 5;
(gdb)
443       new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
(gdb) n
445                          : max (FRAME_TEXT_TO_PIXEL_WIDTH (f, new_text_width),
(gdb)
443       new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
(gdb)
448       new_windows_width = new_pixel_width - 2 * FRAME_INTERNAL_BORDER_WIDTH (f);
(gdb) p new_pixel_width
$9 = 673
(gdb) n
449       new_text_width = FRAME_PIXEL_TO_TEXT_WIDTH (f, new_pixel_width);
(gdb)
450       new_cols = new_text_width / unit_width;
(gdb) p new_text_width
$10 = 640
(gdb) n
452       new_pixel_height = ((inhibit_vertical && (inhibit < 5))
(gdb) p new_cols
$11 = 80
(gdb) n
454                           : max (FRAME_TEXT_TO_PIXEL_HEIGHT (f, new_text_hei
ght),
(gdb)
452       new_pixel_height = ((inhibit_vertical && (inhibit < 5))
(gdb)
459                             - FRAME_TOP_MARGIN_HEIGHT (f)
(gdb)
460                             - 2 * FRAME_INTERNAL_BORDER_WIDTH (f));
(gdb)
458       new_windows_height = (new_pixel_height
(gdb)
461       new_text_height = FRAME_PIXEL_TO_TEXT_HEIGHT (f, new_pixel_height);
(gdb)
462       new_lines = new_text_height / unit_height;
(gdb)
465       if (FRAME_WINDOW_P (f)
(gdb) p new_pixel_height
$12 = 611
(gdb) p new_windows_height
$13 = 577
(gdb) p new_text_height
$14 = 560
(gdb) p new_lines
$15 = 35
(gdb) p old_lines
$16 = (struct row_entry **) 0x6f9b550
(gdb) n
466           && f->official
(gdb)
467           && ((!inhibit_horizontal
(gdb)
468                && (new_pixel_width != old_pixel_width
(gdb)
469                    || inhibit == 0 || inhibit == 2))
(gdb) n
479           if (inhibit_horizontal)
(gdb)
481           else if (inhibit_vertical)
(gdb)
484           x_set_window_size (f, 0, new_text_width, new_text_height, 1);
(gdb) s
x_set_window_size (f=0x6feff78, change_gravity=0, width=640, height=560,
    pixelwise=true) at w32term.c:6092
6092      block_input ();
(gdb) n
6094      if (pixelwise)
(gdb)
6096          pixelwidth = FRAME_TEXT_TO_PIXEL_WIDTH (f, width);
(gdb)
6097          pixelheight = FRAME_TEXT_TO_PIXEL_HEIGHT (f, height);
(gdb)
6105      f->win_gravity = NorthWestGravity;
(gdb) p pixelwidth
$17 = 673
(gdb) p pixelheight
$18 = 611
(gdb) n
6106      x_wm_set_size_hint (f, (long) 0, 0);
(gdb) n
6108      f->want_fullscreen = FULLSCREEN_NONE;
(gdb)
6109      w32fullscreen_hook (f);
(gdb)
6111      rect.left = rect.top = 0;
(gdb)
6112      rect.right = pixelwidth;
(gdb)
6113      rect.bottom = pixelheight;
(gdb)
6116                        FRAME_EXTERNAL_MENU_BAR (f));
(gdb)
6115      AdjustWindowRect (&rect, f->output_data.w32->dwStyle,
(gdb)
6122                         rect.bottom - rect.top,
(gdb)
6121                         rect.right - rect.left,
(gdb)
6118      my_set_window_pos (FRAME_W32_WINDOW (f),
(gdb)
6152      if (w32_enable_frame_resize_hack)
(gdb)
6156                             FRAME_PIXEL_TO_TEXT_HEIGHT (f, pixelheight),
(gdb)
6155          change_frame_size (f, FRAME_PIXEL_TO_TEXT_WIDTH (f, pixelwidth),
(gdb) s
change_frame_size (f=0x6feff78, new_width=640, new_height=560, pretend=false,
    delay=true, safe=false, pixelwise=true) at dispnew.c:5559
5559        change_frame_size_1 (f, new_width, new_height, pretend, delay, safe,
(gdb) s
change_frame_size_1 (f=0x6feff78, new_width=640, new_height=560,
    pretend=false, delay=true, safe=false, pixelwise=true) at dispnew.c:5498
5498      if (delay || (redisplaying_p && !safe))
(gdb) n
5500          f->new_width = new_width;
(gdb)
5501          f->new_height = new_height;
(gdb)
5502          f->new_pixelwise = pixelwise;
(gdb)
5503          delayed_size_change = 1;
(gdb)
5530    }
(gdb) n
change_frame_size (f=0x6feff78, new_width=640, new_height=560, pretend=false,
    delay=true, safe=false, pixelwise=true) at dispnew.c:5561
5561    }
(gdb)
x_set_window_size (f=0x6feff78, change_gravity=0, width=640, height=560,
    pixelwise=true) at w32term.c:6158
6158          SET_FRAME_GARBAGED (f);
(gdb)
6161          mark_window_cursors_off (XWINDOW (f->root_window));
(gdb)
6168          cancel_mouse_face (f);
(gdb)
6171      unblock_input ();
(gdb)
6173      do_pending_window_change (0);
(gdb) s
do_pending_window_change (safe=false) at dispnew.c:5472
5472      if (redisplaying_p && !safe)
(gdb) p redisplaying_p
$19 = false
(gdb) n
5475      while (delayed_size_change)
(gdb) p delayed_size_change
$20 = true
(gdb) n
5479          delayed_size_change = 0;
(gdb)
5481          FOR_EACH_FRAME (tail, frame)
(gdb)
5483              struct frame *f = XFRAME (frame);
(gdb)
5485              if (f->new_height != 0 || f->new_width != 0)
(gdb) p f->new_height
$21 = 560
(gdb) p f->new_width
$22 = 640
(gdb) n
5487                                   0, 0, safe, f->new_pixelwise);
(gdb) s
5486                change_frame_size (f, f->new_width, f->new_height,
(gdb) s
change_frame_size (f=0x6feff78, new_width=640, new_height=560, pretend=false,
    delay=false, safe=false, pixelwise=true) at dispnew.c:5559
5559        change_frame_size_1 (f, new_width, new_height, pretend, delay, safe,
(gdb) s
change_frame_size_1 (f=0x5703b60, new_width=640, new_height=560,
    pretend=false, delay=false, safe=false, pixelwise=true) at dispnew.c:5498
5498      if (delay || (redisplaying_p && !safe))
(gdb) n
5508          f->new_height = 0;
(gdb)
5509          f->new_width = 0;
(gdb)
5510          f->new_pixelwise = 0;
(gdb)
5513          if (pixelwise)
(gdb)
5515              new_width = (new_width <= 0) ? FRAME_TEXT_WIDTH (f) : new_width;
(gdb)
5516              new_height = (new_height <= 0) ? FRAME_TEXT_HEIGHT (f) : new_height;
(gdb)
5528          adjust_frame_size (f, new_width, new_height, 5, pretend);
(gdb) p new_width
$1 = 640
(gdb) p new_height
$2 = 560
(gdb) s
adjust_frame_size (f=0x5703b60, new_width=640, new_height=560, inhibit=5,
    pretend=false) at frame.c:390
390       int unit_width = FRAME_COLUMN_WIDTH (f);
(gdb) n
391       int unit_height = FRAME_LINE_HEIGHT (f);
(gdb)
392       int old_pixel_width = FRAME_PIXEL_WIDTH (f);
(gdb)
393       int old_pixel_height = FRAME_PIXEL_HEIGHT (f);
(gdb)
399       int windows_width = FRAME_WINDOWS_WIDTH (f);
(gdb)
400       int windows_height = FRAME_WINDOWS_HEIGHT (f);
(gdb)
403       struct window *r = XWINDOW (FRAME_ROOT_WINDOW (f));
(gdb)
404       int old_windows_width = WINDOW_PIXEL_WIDTH (r);
(gdb)
406         = (WINDOW_PIXEL_HEIGHT (r)
(gdb)
407            + (FRAME_HAS_MINIBUF_P (f)
(gdb)
409               : 0));
(gdb)
407            + (FRAME_HAS_MINIBUF_P (f)
(gdb)
408               ? WINDOW_PIXEL_HEIGHT (XWINDOW (FRAME_MINIBUF_WINDOW (f)))
(gdb)
409               : 0));
(gdb)
405       int old_windows_height
(gdb)
411       int old_text_width = FRAME_TEXT_WIDTH (f);
(gdb)
412       int old_text_height = FRAME_TEXT_HEIGHT (f);
(gdb)
414       int new_text_width = (new_width >= 0) ? new_width : old_text_width;
(gdb)
415       int new_text_height = (new_height >= 0) ? new_height : old_text_height;
(gdb)
420       XSETFRAME (frame, f);
(gdb)
424       min_windows_width = frame_windows_min_size (frame, Qt, Qt);
(gdb)
425       min_windows_height = frame_windows_min_size (frame, Qnil, Qt);
(gdb)
427       if (inhibit >= 2 && inhibit <= 4)
(gdb)
441         inhibit_horizontal = inhibit_vertical = inhibit == 5;
(gdb)
443       new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
(gdb)
445                          : max (FRAME_TEXT_TO_PIXEL_WIDTH (f, new_text_width),
(gdb)
443       new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
(gdb)
445                          : max (FRAME_TEXT_TO_PIXEL_WIDTH (f, new_text_width),
(gdb)
443       new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
(gdb)
448       new_windows_width = new_pixel_width - 2 * FRAME_INTERNAL_BORDER_WIDTH (f);
(gdb)
449       new_text_width = FRAME_PIXEL_TO_TEXT_WIDTH (f, new_pixel_width);
(gdb)
450       new_cols = new_text_width / unit_width;
(gdb)
452       new_pixel_height = ((inhibit_vertical && (inhibit < 5))
(gdb)
454                           : max (FRAME_TEXT_TO_PIXEL_HEIGHT (f, new_text_height),
(gdb)
452       new_pixel_height = ((inhibit_vertical && (inhibit < 5))
(gdb)
454                           : max (FRAME_TEXT_TO_PIXEL_HEIGHT (f, new_text_height),
(gdb)
452       new_pixel_height = ((inhibit_vertical && (inhibit < 5))
(gdb)
459                             - FRAME_TOP_MARGIN_HEIGHT (f)
(gdb)
460                             - 2 * FRAME_INTERNAL_BORDER_WIDTH (f));
(gdb)
458       new_windows_height = (new_pixel_height
(gdb)
461       new_text_height = FRAME_PIXEL_TO_TEXT_HEIGHT (f, new_pixel_height);
(gdb)
462       new_lines = new_text_height / unit_height;
(gdb)
465       if (FRAME_WINDOW_P (f)
(gdb)
466           && f->official
(gdb)
467           && ((!inhibit_horizontal
(gdb)
470               || (!inhibit_vertical
(gdb)
491       if (new_text_width == old_text_width
(gdb)
492           && new_text_height == old_text_height
(gdb)
493           && new_windows_width == old_windows_width
(gdb)
494           && new_windows_height == old_windows_height
(gdb)
495           && new_pixel_width == old_pixel_width
(gdb)
496           && new_pixel_height == old_pixel_height)
(gdb)
499           sanitize_window_sizes (frame, Qt);
(gdb) p new_text_height
$3 = 560
(gdb) p old_text_height
$4 = 560
(gdb) p new_text_width
$5 = 640
(gdb) p old_text_width
$6 = 640
(gdb) n
500           sanitize_window_sizes (frame, Qnil);
(gdb)
502           return;
(gdb)
do_pending_window_change (safe=false) at dispnew.c:5481
5481          FOR_EACH_FRAME (tail, frame)
(gdb)
5483              struct frame *f = XFRAME (frame);
(gdb)
5485              if (f->new_height != 0 || f->new_width != 0)
(gdb) p f->new_height
$23 = 0
(gdb) p f->new_width
$24 = 0
(gdb) n
5481          FOR_EACH_FRAME (tail, frame)
(gdb)
5475      while (delayed_size_change)
(gdb)
5490    }
(gdb) n
x_set_window_size (f=0x6feff78, change_gravity=0, width=640, height=560,
    pixelwise=true) at w32term.c:6174
6174    }
(gdb)
adjust_frame_size (f=0x6feff78, new_width=640, new_height=560, inhibit=0,
    pretend=true) at frame.c:485
485           f->resized_p = true;
(gdb)
487           return;
(gdb)
583     }
(gdb)
Fx_create_frame (parameters=117344750) at w32fns.c:4683
4683      block_input ();
(gdb)
4684      x_wm_set_size_hint (f, window_prompting, 0);
(gdb) c
Continuing.