Initial commitHEADmaster

1 files changed, 195 insertions, 0 deletions

diff --git a/modules/externalbars/externalbars.c b/modules/externalbars/externalbars.c
new file mode 100644
index 0000000..b84fe06
--- /dev/null
+++ b/modules/externalbars/externalbars.c
@@ -0,0 +1,195 @@
+static ExternalBarStrut *ebarstruts = NULL;
+static Atom eb_atom_strut         = None;
+static Atom eb_atom_strut_partial = None;
+static int  eb_scanning           = 0;
+
+void
+externalbars_init_atoms(void)
+{
+    if (eb_atom_strut == None)
+        eb_atom_strut         = XInternAtom(dpy, "_NET_WM_STRUT", False);
+    if (eb_atom_strut_partial == None)
+        eb_atom_strut_partial = XInternAtom(dpy, "_NET_WM_STRUT_PARTIAL", False);
+}
+
+int
+externalbars_read(Window w, ExternalBarStrut *out)
+{
+    Atom real;
+    int fmt;
+    unsigned long n, extra;
+    unsigned char *p = NULL;
+
+    externalbars_init_atoms();
+    memset(out, 0, sizeof *out);
+    out->win = w;
+
+    /* Prefer _NET_WM_STRUT_PARTIAL (12 longs) */
+    if (XGetWindowProperty(dpy, w, eb_atom_strut_partial, 0L, 12L, False,
+            XA_CARDINAL, &real, &fmt, &n, &extra, &p) == Success && p) {
+        if (n >= 4) {
+            long *s = (long *)p;
+            out->left   = (int)s[0];  out->right  = (int)s[1];
+            out->top    = (int)s[2];  out->bottom = (int)s[3];
+            if (n >= 12) {
+                out->left_start_y    = (int)s[4];  out->left_end_y      = (int)s[5];
+                out->right_start_y   = (int)s[6];  out->right_end_y     = (int)s[7];
+                out->top_start_x     = (int)s[8];  out->top_end_x       = (int)s[9];
+                out->bottom_start_x  = (int)s[10]; out->bottom_end_x    = (int)s[11];
+            } else {
+                out->left_start_y    = 0; out->left_end_y      = sh;
+                out->right_start_y   = 0; out->right_end_y     = sh;
+                out->top_start_x     = 0; out->top_end_x       = sw;
+                out->bottom_start_x  = 0; out->bottom_end_x    = sw;
+            }
+            XFree(p);
+            if (out->left == 0 && out->right == 0 &&
+                out->top  == 0 && out->bottom == 0)
+                return 0;
+            return 1;
+        }
+        XFree(p);
+        p = NULL;
+    }
+
+    /* Fallback: plain _NET_WM_STRUT (4 longs) */
+    if (XGetWindowProperty(dpy, w, eb_atom_strut, 0L, 4L, False,
+            XA_CARDINAL, &real, &fmt, &n, &extra, &p) == Success && p) {
+        if (n >= 4) {
+            long *s = (long *)p;
+            out->left   = (int)s[0];  out->right  = (int)s[1];
+            out->top    = (int)s[2];  out->bottom = (int)s[3];
+            out->left_start_y    = 0; out->left_end_y      = sh;
+            out->right_start_y   = 0; out->right_end_y     = sh;
+            out->top_start_x     = 0; out->top_end_x       = sw;
+            out->bottom_start_x  = 0; out->bottom_end_x    = sw;
+            XFree(p);
+            if (out->left == 0 && out->right == 0 &&
+                out->top  == 0 && out->bottom == 0)
+                return 0;
+            return 1;
+        }
+        XFree(p);
+    }
+    return 0;
+}
+
+int
+externalbars_hasstrut(Window w)
+{
+    ExternalBarStrut tmp;
+    return externalbars_read(w, &tmp);
+}
+
+void
+externalbars_begin_scan(void)
+{
+    eb_scanning = 1;
+}
+
+void
+externalbars_end_scan(void)
+{
+    eb_scanning = 0;
+    externalbars_reapply_all();
+}
+
+void
+externalbars_register(Window w)
+{
+    ExternalBarStrut tmp, *sw;
+
+    if (!externalbars_read(w, &tmp))
+        return;
+
+    for (sw = ebarstruts; sw; sw = sw->next) {
+        if (sw->win == w) {
+            ExternalBarStrut *nxt = sw->next;
+            *sw = tmp;
+            sw->next = nxt;
+            if (!eb_scanning)
+                externalbars_reapply_all();
+            return;
+        }
+    }
+
+    sw = ecalloc(1, sizeof(ExternalBarStrut));
+    *sw = tmp;
+    sw->next = ebarstruts;
+    ebarstruts = sw;
+    if (!eb_scanning)
+        externalbars_reapply_all();
+}
+
+void
+externalbars_unregister(Window w)
+{
+    ExternalBarStrut **prev = &ebarstruts, *sw;
+
+    while ((sw = *prev)) {
+        if (sw->win == w) {
+            *prev = sw->next;
+            free(sw);
+            if (!eb_scanning)
+                externalbars_reapply_all();
+            return;
+        }
+        prev = &sw->next;
+    }
+}
+
+void
+externalbars_apply(Monitor *m)
+{
+    ExternalBarStrut *s;
+    int top = 0, bottom = 0, left = 0, right = 0;
+
+    for (s = ebarstruts; s; s = s->next) {
+        if (s->top > 0) {
+            if (s->top_start_x < m->mx + m->mw && s->top_end_x > m->mx) {
+                int local = s->top - m->my;
+                if (local > 0)
+                    top = MAX(top, MIN(local, m->mh));
+            }
+        }
+        if (s->bottom > 0) {
+            if (s->bottom_start_x < m->mx + m->mw && s->bottom_end_x > m->mx) {
+                int local = s->bottom - (sh - (m->my + m->mh));
+                if (local > 0)
+                    bottom = MAX(bottom, MIN(local, m->mh));
+            }
+        }
+        if (s->left > 0) {
+            if (s->left_start_y < m->my + m->mh && s->left_end_y > m->my) {
+                int local = s->left - m->mx;
+                if (local > 0)
+                    left = MAX(left, MIN(local, m->mw));
+            }
+        }
+        if (s->right > 0) {
+            if (s->right_start_y < m->my + m->mh && s->right_end_y > m->my) {
+                int local = s->right - (sw - (m->mx + m->mw));
+                if (local > 0)
+                    right = MAX(right, MIN(local, m->mw));
+            }
+        }
+    }
+
+    m->strut_top    = top;
+    m->strut_bottom = bottom;
+    m->strut_left   = left;
+    m->strut_right  = right;
+}
+
+void
+externalbars_reapply_all(void)
+{
+    Monitor *m;
+
+    for (m = mons; m; m = m->next) {
+        externalbars_apply(m);
+        updatebarpos(m);
+    }
+    if (selmon)
+        arrange(NULL);
+}