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flash: implement 'flash'

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Use our own escape sequence for the 'flash' terminfo entry.

Implemented by arming a timer FD and setting a boolean that indicates
we're currently "flashing".

The renderer draws a semi-transparent yellowish layer over the entire
window when "flashing" is active.
This commit is contained in:
Daniel Eklöf 2019-07-21 19:14:19 +02:00
parent 1ff04c5e36
commit 0dd8951cb3
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GPG key ID: 5BBD4992C116573F
5 changed files with 84 additions and 22 deletions
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58
render.c
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@ -296,34 +296,40 @@ grid_render(struct terminal *term)
struct buffer *buf = shm_get_buffer(term->wl.shm, term->width, term->height);
cairo_set_operator(buf->cairo, CAIRO_OPERATOR_SOURCE);
if (term->flash_active)
term_damage_view(term);
static struct buffer *last_buf = NULL;
if (last_buf != buf || false) {
if (last_buf != NULL) {
LOG_DBG("new buffer");
static bool last_flash = false;
/* Fill area outside the cell grid with the default background color */
int rmargin = term->cols * term->cell_width;
int bmargin = term->rows * term->cell_height;
int rmargin_width = term->width - rmargin;
int bmargin_height = term->height - bmargin;
/* If we resized the window, or is flashing, or just stopped flashing */
if (last_buf != buf || term->flash_active || last_flash) {
LOG_DBG("new buffer");
uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
struct rgb bg = color_hex_to_rgb(_bg);
cairo_set_source_rgb(buf->cairo, bg.r, bg.g, bg.b);
/* Fill area outside the cell grid with the default background color */
int rmargin = term->cols * term->cell_width;
int bmargin = term->rows * term->cell_height;
int rmargin_width = term->width - rmargin;
int bmargin_height = term->height - bmargin;
cairo_rectangle(buf->cairo, rmargin, 0, rmargin_width, term->height);
cairo_rectangle(buf->cairo, 0, bmargin, term->width, bmargin_height);
cairo_fill(buf->cairo);
uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
struct rgb bg = color_hex_to_rgb(_bg);
cairo_set_source_rgb(buf->cairo, bg.r, bg.g, bg.b);
wl_surface_damage_buffer(
term->wl.surface, rmargin, 0, rmargin_width, term->height);
wl_surface_damage_buffer(
term->wl.surface, 0, bmargin, term->width, bmargin_height);
cairo_rectangle(buf->cairo, rmargin, 0, rmargin_width, term->height);
cairo_rectangle(buf->cairo, 0, bmargin, term->width, bmargin_height);
cairo_fill(buf->cairo);
wl_surface_damage_buffer(
term->wl.surface, rmargin, 0, rmargin_width, term->height);
wl_surface_damage_buffer(
term->wl.surface, 0, bmargin, term->width, bmargin_height);
/* Force a full grid refresh */
term_damage_view(term);
/* Force a full grid refresh */
term_damage_all(term);
}
last_buf = buf;
last_flash = term->flash_active;
}
bool all_clean = tll_length(term->grid->scroll_damage) == 0;
@ -419,6 +425,16 @@ grid_render(struct terminal *term)
if (gseq.count > 0)
gseq_flush(term, buf);
if (term->flash_active) {
cairo_set_source_rgba(buf->cairo, 1.0, 1.0, 0.0, 0.5);
cairo_set_operator(buf->cairo, CAIRO_OPERATOR_OVER);
cairo_rectangle(buf->cairo, 0, 0, term->width, term->height);
cairo_fill(buf->cairo);
wl_surface_damage_buffer(
term->wl.surface, 0, 0, term->width, term->height);
}
assert(term->grid->offset >= 0 && term->grid->offset < term->grid->num_rows);
assert(term->grid->view >= 0 && term->grid->view < term->grid->num_rows);