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#include "x11.h"
#include <stdlib.h>
#include <cairo-xlib.h>
#include <X11/extensions/Xinerama.h>
static void
destroy_buffer(struct buffer *buffer)
{
bm_cairo_destroy(&buffer->cairo);
memset(buffer, 0, sizeof(struct buffer));
}
static bool
create_buffer(struct window *window, struct buffer *buffer, int32_t width, int32_t height)
{
cairo_surface_t *surf;
if (!(surf = cairo_xlib_surface_create(window->display, window->drawable, DefaultVisual(window->display, window->screen), width, height)))
goto fail;
cairo_xlib_surface_set_size(surf, width, height);
if (!bm_cairo_create_for_surface(&buffer->cairo, surf)) {
cairo_surface_destroy(surf);
goto fail;
}
buffer->width = width;
buffer->height = height;
buffer->created = true;
return true;
fail:
destroy_buffer(buffer);
return false;
}
static struct buffer*
next_buffer(struct window *window)
{
assert(window);
struct buffer *buffer = &window->buffer;
if (!buffer)
return NULL;
if (window->width != buffer->width || window->height != buffer->height)
destroy_buffer(buffer);
if (!buffer->created && !create_buffer(window, buffer, window->width, window->height))
return NULL;
return buffer;
}
void
bm_x11_window_render(struct window *window, const struct bm_menu *menu)
{
assert(window && menu);
uint32_t oldw = window->width, oldh = window->height;
struct buffer *buffer;
for (int32_t tries = 0; tries < 2; ++tries) {
if (!(buffer = next_buffer(window))) {
fprintf(stderr, "could not get next buffer");
exit(EXIT_FAILURE);
}
if (!window->notify.render)
break;
cairo_push_group(buffer->cairo.cr);
struct cairo_paint_result result;
window->notify.render(&buffer->cairo, buffer->width, buffer->height, window->max_height, menu, &result);
window->displayed = result.displayed;
cairo_pop_group_to_source(buffer->cairo.cr);
if (window->height == result.height)
break;
window->height = result.height;
destroy_buffer(buffer);
}
if (oldw != window->width || oldh != window->height) {
if (window->bottom) {
XMoveResizeWindow(window->display, window->drawable, window->x, window->max_height - window->height, window->width, window->height);
} else {
XResizeWindow(window->display, window->drawable, window->width, window->height);
}
}
if (buffer->created) {
cairo_paint(buffer->cairo.cr);
cairo_surface_flush(buffer->cairo.surface);
}
}
void
bm_x11_window_key_press(struct window *window, XKeyEvent *ev)
{
KeySym keysym = NoSymbol;
XmbLookupString(window->xic, ev, NULL, 0, &keysym, NULL);
window->mods = 0;
if (ev->state & ControlMask) window->mods |= MOD_CTRL;
if (ev->state & ShiftMask) window->mods |= MOD_SHIFT;
if (ev->state & Mod1Mask) window->mods |= MOD_ALT;
window->keysym = keysym;
}
void
bm_x11_window_destroy(struct window *window)
{
assert(window);
destroy_buffer(&window->buffer);
if (window->display && window->drawable)
XDestroyWindow(window->display, window->drawable);
}
void
bm_x11_window_set_monitor(struct window *window, uint32_t monitor)
{
if (window->monitor == monitor)
return;
Window root = DefaultRootWindow(window->display);
{
/* xinerama logic straight from dmenu */
#define INTERSECT(x,y,w,h,r) (fmax(0, fmin((x)+(w),(r).x_org+(r).width) - fmax((x),(r).x_org)) * fmax(0, fmin((y)+(h),(r).y_org+(r).height) - fmax((y),(r).y_org)))
int32_t n;
XineramaScreenInfo *info;
if ((info = XineramaQueryScreens(window->display, &n))) {
int32_t x, y, a, j, di, i = 0, area = 0;
uint32_t du;
Window w, pw, dw, *dws;
XWindowAttributes wa;
XGetInputFocus(window->display, &w, &di);
if (monitor > 0)
i = ((int32_t)monitor > n ? n : (int32_t)monitor) - 1;
if (monitor == 0 && w != root && w != PointerRoot && w != None) {
/* find top-level window containing current input focus */
do {
if (XQueryTree(window->display, (pw = w), &dw, &w, &dws, &du) && dws)
XFree(dws);
} while(w != root && w != pw);
/* find xinerama screen with which the window intersects most */
if (XGetWindowAttributes(window->display, pw, &wa)) {
for (j = 0; j < n; j++)
if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
area = a;
i = j;
}
}
}
/* no focused window is on screen, so use pointer location instead */
if (monitor == 0 && !area && XQueryPointer(window->display, root, &dw, &dw, &x, &y, &di, &di, &du)) {
for (i = 0; i < n; i++) {
if (INTERSECT(x, y, 1, 1, info[i]))
break;
}
}
window->x = info[i].x_org;
window->y = info[i].y_org + (window->bottom ? info[i].height - window->height : 0);
window->width = info[i].width;
window->max_height = info[i].height;
XFree(info);
} else {
window->max_height = DisplayHeight(window->display, window->screen);
window->x = 0;
window->y = (window->bottom ? window->max_height - window->height : 0);
window->width = DisplayWidth(window->display, window->screen);
}
#undef INTERSECT
}
window->monitor = monitor;
XMoveResizeWindow(window->display, window->drawable, window->x, window->y, window->width, window->height);
XFlush(window->display);
}
void
bm_x11_window_set_bottom(struct window *window, bool bottom)
{
if (window->bottom == bottom)
return;
window->bottom = bottom;
bm_x11_window_set_monitor(window, window->monitor);
}
bool
bm_x11_window_create(struct window *window, Display *display)
{
assert(window);
window->display = display;
window->screen = DefaultScreen(display);
window->width = window->height = 1;
window->monitor = -1;
XSetWindowAttributes wa = {
.override_redirect = True,
.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask
};
window->drawable = XCreateWindow(display, DefaultRootWindow(display), 0, 0, window->width, window->height, 0, DefaultDepth(display, window->screen), CopyFromParent, DefaultVisual(display, window->screen), CWOverrideRedirect | CWBackPixel | CWEventMask, &wa);
XSelectInput(display, window->drawable, ButtonPressMask | KeyPressMask);
XMapRaised(display, window->drawable);
window->xim = XOpenIM(display, NULL, NULL, NULL);
window->xic = XCreateIC(window->xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, XNClientWindow, window->drawable, XNFocusWindow, window->drawable, NULL);
return true;
}
/* vim: set ts=8 sw=4 tw=0 :*/
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