implemented aspect ratio support of windows

diff --git a/client.c b/client.c
index f3c9bf2..2b194d7 100644 (file)
--- a/client.c
+++ b/client.c
@@ -10,6 +10,13 @@
 /* static */
 
 static void
+closestpt(float *rx, float *ry, float x, float y, float grad) {
+       float u = (x * grad + y) / (grad * grad + 1);
+       *rx = u * grad;
+       *ry = u;
+}
+
+static void
 detachstack(Client *c) {
        Client **tc;
        for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
@@ -184,15 +191,12 @@ manage(Window w, XWindowAttributes *wa) {
 
 void
 resize(Client *c, Bool sizehints) {
+       float dx, dy, min, max, actual;
        XWindowChanges wc;
 
        if(c->w <= 0 || c->h <= 0)
                return;
        if(sizehints) {
-               if(c->incw)
-                       c->w -= (c->w - c->basew) % c->incw;
-               if(c->inch)
-                       c->h -= (c->h - c->baseh) % c->inch;
                if(c->minw && c->w < c->minw)
                        c->w = c->minw;
                if(c->minh && c->h < c->minh)
@@ -201,6 +205,30 @@ resize(Client *c, Bool sizehints) {
                        c->w = c->maxw;
                if(c->maxh && c->h > c->maxh)
                        c->h = c->maxh;
+               /* inspired by algorithm from fluxbox */
+               if(c->minay > 0 && c->maxay && (c->h - c->baseh) > 0) {
+                       dx = (float)(c->w - c->basew);
+                       dy = (float)(c->h - c->baseh);
+                       min = (float)(c->minax) / (float)(c->minay);
+                       max = (float)(c->maxax) / (float)(c->maxay);
+                       actual = dx / dy;
+                       if(max > 0 && min > 0 && actual > 0) {
+                               if(actual < min) {
+                                       closestpt(&dx, &dy, dx, dy, min);
+                                       c->w = (int)dx + c->basew;
+                                       c->h = (int)dy + c->baseh;
+                               }
+                               else if(actual > max) {
+                                       closestpt(&dx, &dy, dx, dy, max);
+                                       c->w = (int)dx + c->basew;
+                                       c->h = (int)dy + c->baseh;
+                               }
+                       }
+               }
+               if(c->incw)
+                       c->w -= (c->w - c->basew) % c->incw;
+               if(c->inch)
+                       c->h -= (c->h - c->baseh) % c->inch;
        }
        if(c->w == sw && c->h == sh)
                c->border = 0;
@@ -257,6 +285,14 @@ updatesizehints(Client *c) {
        }
        else
                c->minw = c->minh = 0;
+       if(c->flags & PAspect) {
+               c->minax = size.min_aspect.x;
+               c->minay = size.min_aspect.y;
+               c->maxax = size.max_aspect.x;
+               c->maxay = size.max_aspect.y;
+       }
+       else
+               c->minax = c->minay = c->maxax = c->maxay = 0;
        c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
                                c->maxw == c->minw && c->maxh == c->minh);
 }

diff --git a/dwm.h b/dwm.h
index 1021428..a7053c5 100644 (file)
--- a/dwm.h
+++ b/dwm.h
@@ -73,6 +73,7 @@ struct Client {
        int x, y, w, h;
        int rx, ry, rw, rh; /* revert geometry */
        int basew, baseh, incw, inch, maxw, maxh, minw, minh;
+       int minax, minay, maxax, maxay;
        long flags; 
        unsigned int border;
        Bool isfloat, isfixed, ismax;