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Extend the menu drawing function to support custom characters and
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styles, from Alexis Hildebrandt.
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nicm committed Aug 8, 2023
1 parent 2b535bc commit 1071ef8
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Showing 4 changed files with 89 additions and 68 deletions.
3 changes: 2 additions & 1 deletion menu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -203,7 +203,8 @@ menu_draw_cb(struct client *c, void *data,

screen_write_start(&ctx, s);
screen_write_clearscreen(&ctx, 8);
screen_write_menu(&ctx, menu, md->choice, &gc);
screen_write_menu(&ctx, menu, md->choice, BOX_LINES_DEFAULT,
&grid_default_cell, &grid_default_cell, &gc);
screen_write_stop(&ctx);

for (i = 0; i < screen_size_y(&md->s); i++) {
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148 changes: 83 additions & 65 deletions screen-write.c
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,6 @@ static void screen_write_collect_clear(struct screen_write_ctx *, u_int,
static void screen_write_collect_scroll(struct screen_write_ctx *, u_int);
static void screen_write_collect_flush(struct screen_write_ctx *, int,
const char *);

static int screen_write_overwrite(struct screen_write_ctx *,
struct grid_cell *, u_int);
static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
Expand Down Expand Up @@ -592,9 +591,46 @@ screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
}
}

/* Select character set for drawing border lines. */
static void
screen_write_box_border_set(enum box_lines lines, int cell_type,
struct grid_cell *gc)
{
switch (lines) {
case BOX_LINES_NONE:
break;
case BOX_LINES_DOUBLE:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
break;
case BOX_LINES_HEAVY:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
break;
case BOX_LINES_ROUNDED:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
break;
case BOX_LINES_SIMPLE:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
break;
case BOX_LINES_PADDED:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
break;
case BOX_LINES_SINGLE:
case BOX_LINES_DEFAULT:
gc->attr |= GRID_ATTR_CHARSET;
utf8_set(&gc->data, CELL_BORDERS[cell_type]);
break;
}
}

/* Draw a horizontal line on screen. */
void
screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right)
screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right,
enum box_lines lines, const struct grid_cell *border_gc)
{
struct screen *s = ctx->s;
struct grid_cell gc;
Expand All @@ -603,13 +639,27 @@ screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right)
cx = s->cx;
cy = s->cy;

memcpy(&gc, &grid_default_cell, sizeof gc);
if (border_gc != NULL)
memcpy(&gc, border_gc, sizeof gc);
else
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.attr |= GRID_ATTR_CHARSET;

screen_write_putc(ctx, &gc, left ? 't' : 'q');
if (left)
screen_write_box_border_set(lines, CELL_LEFTJOIN, &gc);
else
screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
screen_write_cell(ctx, &gc);

screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
for (i = 1; i < nx - 1; i++)
screen_write_putc(ctx, &gc, 'q');
screen_write_putc(ctx, &gc, right ? 'u' : 'q');
screen_write_cell(ctx, &gc);

if (right)
screen_write_box_border_set(lines, CELL_RIGHTJOIN, &gc);
else
screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
screen_write_cell(ctx, &gc);

screen_write_set_cursor(ctx, cx, cy);
}
Expand Down Expand Up @@ -641,84 +691,52 @@ screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)

/* Draw a menu on screen. */
void
screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu,
int choice, const struct grid_cell *choice_gc)
screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, int choice,
enum box_lines lines, const struct grid_cell *menu_gc,
const struct grid_cell *border_gc, const struct grid_cell *choice_gc)
{
struct screen *s = ctx->s;
struct grid_cell default_gc;
const struct grid_cell *gc = &default_gc;
u_int cx, cy, i, j;
u_int cx, cy, i, j, width = menu->width;
const char *name;

cx = s->cx;
cy = s->cy;

memcpy(&default_gc, &grid_default_cell, sizeof default_gc);
memcpy(&default_gc, menu_gc, sizeof default_gc);

screen_write_box(ctx, menu->width + 4, menu->count + 2,
BOX_LINES_DEFAULT, &default_gc, menu->title);
screen_write_box(ctx, menu->width + 4, menu->count + 2, lines,
border_gc, menu->title);

for (i = 0; i < menu->count; i++) {
name = menu->items[i].name;
if (name == NULL) {
screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
screen_write_hline(ctx, menu->width + 4, 1, 1);
} else {
if (choice >= 0 && i == (u_int)choice && *name != '-')
gc = choice_gc;
screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
for (j = 0; j < menu->width; j++)
screen_write_putc(ctx, gc, ' ');
screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
if (*name == '-') {
name++;
default_gc.attr |= GRID_ATTR_DIM;
format_draw(ctx, gc, menu->width, name, NULL,
0);
default_gc.attr &= ~GRID_ATTR_DIM;
} else
format_draw(ctx, gc, menu->width, name, NULL,
gc == choice_gc);
gc = &default_gc;
screen_write_hline(ctx, width + 4, 1, 1, lines, gc);
continue;
}
}

screen_write_set_cursor(ctx, cx, cy);
}
if (choice >= 0 && i == (u_int)choice && *name != '-')
gc = choice_gc;

static void
screen_write_box_border_set(enum box_lines box_lines, int cell_type,
struct grid_cell *gc)
{
switch (box_lines) {
case BOX_LINES_NONE:
break;
case BOX_LINES_DOUBLE:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
break;
case BOX_LINES_HEAVY:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
break;
case BOX_LINES_ROUNDED:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
break;
case BOX_LINES_SIMPLE:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
break;
case BOX_LINES_PADDED:
gc->attr &= ~GRID_ATTR_CHARSET;
utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
break;
case BOX_LINES_SINGLE:
case BOX_LINES_DEFAULT:
gc->attr |= GRID_ATTR_CHARSET;
utf8_set(&gc->data, CELL_BORDERS[cell_type]);
break;
screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
for (j = 0; j < width; j++)
screen_write_putc(ctx, gc, ' ');

screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
if (*name == '-') {
default_gc.attr |= GRID_ATTR_DIM;
format_draw(ctx, gc, width, name + 1, NULL, 0);
default_gc.attr &= ~GRID_ATTR_DIM;
continue;
}

format_draw(ctx, gc, width, name, NULL, gc == choice_gc);
gc = &default_gc;
}

screen_write_set_cursor(ctx, cx, cy);
}

/* Draw a box on screen. */
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4 changes: 3 additions & 1 deletion tmux.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2889,9 +2889,11 @@ void screen_write_putc(struct screen_write_ctx *, const struct grid_cell *,
u_char);
void screen_write_fast_copy(struct screen_write_ctx *, struct screen *,
u_int, u_int, u_int, u_int);
void screen_write_hline(struct screen_write_ctx *, u_int, int, int);
void screen_write_hline(struct screen_write_ctx *, u_int, int, int,
enum box_lines, const struct grid_cell *);
void screen_write_vline(struct screen_write_ctx *, u_int, int, int);
void screen_write_menu(struct screen_write_ctx *, struct menu *, int,
enum box_lines, const struct grid_cell *, const struct grid_cell *,
const struct grid_cell *);
void screen_write_box(struct screen_write_ctx *, u_int, u_int,
enum box_lines, const struct grid_cell *, const char *);
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2 changes: 1 addition & 1 deletion window-client.c
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Original file line number Diff line number Diff line change
Expand Up @@ -242,7 +242,7 @@ window_client_draw(__unused void *modedata, void *itemdata,
screen_write_cursormove(ctx, cx, cy + 2, 0);
else
screen_write_cursormove(ctx, cx, cy + sy - 1 - lines, 0);
screen_write_hline(ctx, sx, 0, 0);
screen_write_hline(ctx, sx, 0, 0, BOX_LINES_DEFAULT, NULL);

if (at != 0)
screen_write_cursormove(ctx, cx, cy, 0);
Expand Down

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