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Code Issues Releases Activity

(frame_update_line_height): Check param_faces[i] not null.

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This commit is contained in:
Richard M. Stallman 1994-04-10 01:19:57 +00:00
parent 410d432151
commit 867dd1594f
1 changed files with 31 additions and 37 deletions
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68
src/xfaces.c
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@ -636,10 +636,11 @@ ensure_face_ready (f, id)
FRAME_PARAM_FACES (f) [id] = allocate_face ();
}
/* Computing faces appropriate for a given piece of text in a buffer. */
/* Return non-zero if FONT1 and FONT2 have the same size bounding box.
/* Return non-zero if FONT1 and FONT2 have the same width.
We do not check the height, because we can now deal with
different heights.
We assume that they're both character-cell fonts. */
int
same_size_fonts (font1, font2)
XFontStruct *font1, *font2;
@ -648,15 +649,6 @@ same_size_fonts (font1, font2)
XCharStruct *bounds2 = &font2->min_bounds;
return (bounds1->width == bounds2->width);
/* Checking the following caused bad results in some cases
when fonts that should be the same size
actually have very slightly different size.
It is possible that this reintroduces the bug whereby line positions
were not right. However, the right way to fix that is to change xterm.c
so that the vertical positions of lines
depend only on the height of the frame's font.
&& bounds1->ascent == bounds2->ascent
&& bounds1->descent == bounds2->descent); */
}
/* Update the line_height of frame F according to the biggest font in
@ -670,7 +662,8 @@ frame_update_line_height (f)
int biggest = FONT_HEIGHT (f->display.x->font);
for (i = 0; i < f->display.x->n_param_faces; i++)
if (f->display.x->param_faces[i]->font != (XFontStruct *) FACE_DEFAULT)
if (f->display.x->param_faces[i] != 0
&& f->display.x->param_faces[i]->font != (XFontStruct *) FACE_DEFAULT)
{
int height = FONT_HEIGHT (f->display.x->param_faces[i]->font);
if (height > biggest)
@ -683,14 +676,16 @@ frame_update_line_height (f)
f->display.x->line_height = biggest;
x_set_window_size (f, 0, f->width, f->height);
}
/* Modify face TO by copying from FROM all properties which have
nondefault settings. */
static void
merge_faces (from, to)
struct face *from, *to;
{
/* Only merge the font if it's the same size as the base font. */
/* Only merge the font if it's the same width as the base font.
Otherwise ignore it, since we can't handle it properly. */
if (from->font != (XFontStruct *) FACE_DEFAULT
&& same_size_fonts (from->font, to->font))
to->font = from->font;
@ -706,6 +701,7 @@ merge_faces (from, to)
/* Set up the basic set of facial parameters, based on the frame's
data; all faces are deltas applied to this. */
static void
compute_base_face (f, face)
FRAME_PTR f;
@ -724,7 +720,26 @@ compute_base_face (f, face)
face->cached_index = -1;
}
/* Return the face ID to use to display a special glyph which selects
FACE_CODE as the face ID, assuming that ordinarily the face would
be CURRENT_FACE. F is the frame. */
int
compute_glyph_face (f, face_code, current_face)
struct frame *f;
int face_code, current_face;
{
struct face face;
face = *FRAME_COMPUTED_FACES (f)[current_face];
if (face_code >= 0 && face_code < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [face_code] != 0)
merge_faces (FRAME_PARAM_FACES (f) [face_code], &face);
return intern_computed_face (f, &face);
}
/* Return the face ID associated with a buffer position POS.
Store into *ENDPTR the position at which a different face is needed.
This does not take account of glyphs that specify their own face codes.
@ -861,28 +876,7 @@ compute_char_face (f, w, pos, region_beg, region_end, endptr, limit, mouse)
return intern_computed_face (f, &face);
}
/* Return the face ID to use to display a special glyph which selects
FACE_CODE as the face ID, assuming that ordinarily the face would
be CURRENT_FACE. F is the frame. */
int
compute_glyph_face (f, face_code, current_face)
struct frame *f;
int face_code, current_face;
{
struct face face;
face = *FRAME_COMPUTED_FACES (f)[current_face];
if (face_code >= 0 && face_code < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [face_code] != 0)
merge_faces (FRAME_PARAM_FACES (f) [face_code], &face);
return intern_computed_face (f, &face);
}
/* Recompute the GC's for the default and modeline faces.
We call this after changing frame parameters on which those GC's
depend. */