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Support for RandR

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This should allow lemonbar to dynamically detect and handle RandR
changes.

When ever a RandR ouput change notification is received we fetch all the
randr monitors and resize the bars to fit them. Creating new ones where
they are missing.
This commit is contained in:
Jesper Jensen 2016-02-20 15:59:12 +01:00 committed by Jesper Jensen
parent 3020df1923
commit 0d6f35383b
1 changed files with 149 additions and 36 deletions
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185
lemonbar.c
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@ -85,6 +85,7 @@ static xcb_screen_t *scr;
static xcb_gcontext_t gc[GC_MAX];
static xcb_visualid_t visual;
static xcb_colormap_t colormap;
static const xcb_query_extension_reply_t *randr;
static monitor_t *monhead, *montail;
static font_t *font_list[MAX_FONT_COUNT];
static int font_count = 0;
@ -92,6 +93,7 @@ static int font_index = -1;
static uint32_t attrs = 0;
static bool dock = false;
static bool topbar = true;
static char *wm_name;
static int bw = -1, bh = -1, bx = 0, by = 0;
static int bu = 1; // Underline height
static rgba_t fgc, bgc, ugc;
@ -731,7 +733,7 @@ set_ewmh_atoms (void)
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_DESKTOP], XCB_ATOM_CARDINAL, 32, 1, (const uint32_t []){ -1 } );
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_STRUT_PARTIAL], XCB_ATOM_CARDINAL, 32, 12, strut);
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_STRUT], XCB_ATOM_CARDINAL, 32, 4, strut);
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, 3, "bar");
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, 3, wm_name);
}
}
@ -801,23 +803,8 @@ rect_sort_cb (const void *p1, const void *p2)
}
void
monitor_create_chain (xcb_rectangle_t *rects, const int num)
bar_calculate_size (int width, int height)
{
int i;
int width = 0, height = 0;
int left = bx;
// Sort before use
qsort(rects, num, sizeof(xcb_rectangle_t), rect_sort_cb);
for (i = 0; i < num; i++) {
int h = rects[i].y + rects[i].height;
// Accumulated width of all monitors
width += rects[i].width;
// Get height of screen from y_offset + height of lowest monitor
if (h >= height)
height = h;
}
if (bw < 0)
bw = width - bx;
@ -831,6 +818,35 @@ monitor_create_chain (xcb_rectangle_t *rects, const int num)
fprintf(stderr, "The geometry specified doesn't fit the screen!\n");
exit(EXIT_FAILURE);
}
}
void
calculate_screen_size(xcb_rectangle_t *rects, const int num, int* width, int* height)
{
int i;
// Sort before use
qsort(rects, num, sizeof(xcb_rectangle_t), rect_sort_cb);
for (i = 0; i < num; i++) {
int h = rects[i].y + rects[i].height;
// Accumulated width of all monitors
*width += rects[i].width;
// Get height of screen from y_offset + height of lowest monitor
if (h >= *height)
*height = h;
}
}
void
monitor_create_chain (xcb_rectangle_t *rects, const int num)
{
int i;
int width = 0, height = 0;
int left = bx;
calculate_screen_size(rects, num, &width, &height);
bar_calculate_size(width, height);
// Left is a positive number or zero therefore monitors with zero width are excluded
width = bw;
@ -863,6 +879,77 @@ monitor_create_chain (xcb_rectangle_t *rects, const int num)
}
}
void
monitor_update_chain (xcb_rectangle_t *rects, const int num)
{
int i;
int width = 0, height = 0;
int left = bx;
calculate_screen_size(rects, num, &width, &height);
bar_calculate_size(width, height);
// Left is a positive number or zero therefore monitors with zero width are excluded
width = bw;
monitor_t *this = monhead;
for (i = 0; i < num; i++) {
if (rects[i].y + rects[i].height < by)
continue;
if (rects[i].width > left) {
if (this == NULL) {
this = monitor_new(
rects[i].x + left,
rects[i].y,
min(width, rects[i].width - left),
rects[i].height);
if (!this)
break;
monitor_add(this);
} else {
this->x = rects[i].x + left;
this->y = (topbar ? by : height - bh - by) + rects[i].y;
this->width = min(width, rects[i].width - left);
xcb_configure_window(c, this->window, XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT | XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, (const uint32_t []){ this->x, this->y, this->width, bh });
xcb_free_pixmap(c, this->pixmap);
this->pixmap = xcb_generate_id(c);
int depth = (visual == scr->root_visual) ? XCB_COPY_FROM_PARENT : 32;
xcb_create_pixmap(c, depth, this->pixmap, this->window, this->width, bh);
}
this = this->next;
width -= rects[i].width - left;
// No need to check for other monitors
if (width <= 0)
break;
}
left -= rects[i].width;
if (left < 0)
left = 0;
}
//Do we have too many monitors (Some were disconnected)
if(this) {
montail = this->prev;
this->prev->next = NULL;
while(this) {
monitor_t *next = this->next;
xcb_destroy_window(c, this->window);
xcb_free_pixmap(c, this->window);
free(this);
this = next;
}
}
}
void
get_randr_monitors (void)
{
@ -954,7 +1041,10 @@ get_randr_monitors (void)
if (rects[i].width != 0)
r[j++] = rects[i];
monitor_create_chain(r, valid);
if (!monhead)
monitor_create_chain(r, valid);
else
monitor_update_chain(r, valid);
}
void
@ -1076,10 +1166,26 @@ xconn (void)
colormap = xcb_generate_id(c);
xcb_create_colormap(c, XCB_COLORMAP_ALLOC_NONE, colormap, scr->root, visual);
randr = xcb_get_extension_data(c, &xcb_randr_id);
xcb_randr_select_input(c, scr->root, XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE);
}
void
init (char *wm_name)
map_monitors (void)
{
for (monitor_t *mon = monhead; mon; mon = mon->next) {
fill_rect(mon->pixmap, gc[GC_CLEAR], 0, 0, mon->width, bh);
xcb_map_window(c, mon->window);
// Make sure that the window really gets in the place it's supposed to be
// Some WM such as Openbox need this
xcb_configure_window(c, mon->window, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, (const uint32_t []){ mon->x, mon->y });
}
}
void
init (void)
{
// Try to load a default font
if (!font_count)
@ -1159,19 +1265,7 @@ init (char *wm_name)
gc[GC_ATTR] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_ATTR], monhead->pixmap, XCB_GC_FOREGROUND, (const uint32_t []){ ugc.v });
// Make the bar visible and clear the pixmap
for (monitor_t *mon = monhead; mon; mon = mon->next) {
fill_rect(mon->pixmap, gc[GC_CLEAR], 0, 0, mon->width, bh);
xcb_map_window(c, mon->window);
// Make sure that the window really gets in the place it's supposed to be
// Some WM such as Openbox need this
xcb_configure_window(c, mon->window, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, (const uint32_t []){ mon->x, mon->y });
// Set the WM_NAME atom to the user specified value
if (wm_name)
xcb_change_property(c, XCB_PROP_MODE_REPLACE, monhead->window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8 ,strlen(wm_name), wm_name);
}
map_monitors();
xcb_flush(c);
}
@ -1228,7 +1322,6 @@ main (int argc, char **argv)
bool permanent = false;
int geom_v[4] = { -1, -1, 0, 0 };
int ch, areas;
char *wm_name;
// Install the parachute!
atexit(cleanup);
@ -1242,7 +1335,7 @@ main (int argc, char **argv)
// A safe default
areas = 10;
wm_name = NULL;
wm_name = "bar";
// Connect to the Xserver and initialize scr
xconn();
@ -1300,7 +1393,7 @@ main (int argc, char **argv)
by = geom_v[3];
// Do the heavy lifting
init(wm_name);
init();
// Get the fd to Xserver
pollin[1].fd = xcb_get_file_descriptor(c);
@ -1327,7 +1420,8 @@ main (int argc, char **argv)
while ((ev = xcb_poll_for_event(c))) {
expose_ev = (xcb_expose_event_t *)ev;
switch (ev->response_type & 0x7F) {
uint8_t type = ev->response_type & 0x7F;
switch (type) {
case XCB_EXPOSE:
if (expose_ev->count == 0)
redraw = true;
@ -1343,6 +1437,25 @@ main (int argc, char **argv)
}
}
break;
default:
{
if(type == randr->first_event + XCB_RANDR_NOTIFY) {
xcb_randr_notify_event_t *event = (void *)ev;
switch(event->subCode) {
case XCB_RANDR_NOTIFY_OUTPUT_CHANGE:
bw = geom_v[0];
bh = geom_v[1];
bx = geom_v[2];
by = geom_v[3];
get_randr_monitors();
set_ewmh_atoms();
map_monitors();
parse(input);
redraw = true;
break;
}
}
}
}
free(ev);