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Fix redisplay when mode-line-format changes mode-line's height

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* lisp/frame.el (top-level): Add mode-line-format,
tab-line-format, and header-line-format to the list of variables
that should trigger an immediate redisplay of the buffer's
window.  This fixes redisplay of windows when the mode line
changes its height.

* src/xdisp.c (window_box_height): Use the window's
mode_line_height, tab_line_height, and header_line_height fields
in preference to CURRENT_MODE_LINE_HEIGHT,
CURRENT_TAB_LINE_HEIGHT, and CURRENT_HEADER_LINE_HEIGHT,
respectively.  This fixes display of vertical scroll bar when the
height of the window's mode line changes.
* src/dispnew.c (adjust_glyph_matrix): When resizing a window's
matrix, reset the mode_line_p flag of the previous mode-line row,
so that the window_box_height, CURRENT_MODE_LINE_HEIGHT, and their
ilk won't use stale info.  (Bug#38828)
This commit is contained in:
Eli Zaretskii 2020-01-03 09:28:35 +02:00
parent 1420906b81
commit 37f9182b68
3 changed files with 50 additions and 25 deletions
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3
lisp/frame.el
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@ -2725,6 +2725,9 @@ See also `toggle-frame-maximized'."
line-prefix
wrap-prefix
truncate-lines
mode-line-format
header-line-format
tab-line-format
display-line-numbers
display-line-numbers-width
display-line-numbers-current-absolute

7
src/dispnew.c
View file

@ -534,6 +534,13 @@ adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y
eassert (left >= 0 && right >= 0);
matrix->left_margin_glyphs = left;
matrix->right_margin_glyphs = right;
/* If we are resizing a window, make sure the previous mode-line
row of the window's current matrix is no longer marked as such. */
if (w && matrix == w->current_matrix
&& dim.height != matrix->nrows
&& matrix->nrows <= matrix->rows_allocated)
MATRIX_MODE_LINE_ROW (matrix)->mode_line_p = false;
}
/* Number of rows to be used by MATRIX. */

65
src/xdisp.c
View file

@ -1093,44 +1093,59 @@ window_box_height (struct window *w)
/* Note: the code below that determines the mode-line/header-line/tab-line
height is essentially the same as that contained in the macro
CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether
the appropriate glyph row has its `mode_line_p' flag set,
and if it doesn't, uses estimate_mode_line_height instead. */
CURRENT_{MODE,HEADER,TAB}_LINE_HEIGHT, except that it checks whether
the appropriate glyph row has its `mode_line_p' flag set, and if
it doesn't, uses estimate_mode_line_height instead. */
if (window_wants_mode_line (w))
{
struct glyph_row *ml_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_MODE_LINE_ROW (w->current_matrix)
: 0);
if (ml_row && ml_row->mode_line_p)
height -= ml_row->height;
if (w->mode_line_height >= 0)
height -= w->mode_line_height;
else
height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w));
{
struct glyph_row *ml_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_MODE_LINE_ROW (w->current_matrix)
: 0);
if (ml_row && ml_row->mode_line_p)
height -= ml_row->height;
else
height -= estimate_mode_line_height (f,
CURRENT_MODE_LINE_FACE_ID (w));
}
}
if (window_wants_tab_line (w))
{
struct glyph_row *tl_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_TAB_LINE_ROW (w->current_matrix)
: 0);
if (tl_row && tl_row->mode_line_p)
height -= tl_row->height;
if (w->tab_line_height >= 0)
height -= w->tab_line_height;
else
height -= estimate_mode_line_height (f, TAB_LINE_FACE_ID);
{
struct glyph_row *tl_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_TAB_LINE_ROW (w->current_matrix)
: 0);
if (tl_row && tl_row->mode_line_p)
height -= tl_row->height;
else
height -= estimate_mode_line_height (f, TAB_LINE_FACE_ID);
}
}
if (window_wants_header_line (w))
{
struct glyph_row *hl_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_HEADER_LINE_ROW (w->current_matrix)
: 0);
if (hl_row && hl_row->mode_line_p)
height -= hl_row->height;
else
height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID);
if (w->header_line_height >= 0)
height -= w->header_line_height;
{
struct glyph_row *hl_row
= (w->current_matrix && w->current_matrix->rows
? MATRIX_HEADER_LINE_ROW (w->current_matrix)
: 0);
if (hl_row && hl_row->mode_line_p)
height -= hl_row->height;
else
height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID);
}
}
/* With a very small font and a mode-line that's taller than