add basic tiling

src/layout.c

@@ -0,0 +1,61 @@
+#include "types.h"
+
+void layout_arrange(struct absinthe_output *output)
+{
+    if (!output)
+        return;
+
+    struct absinthe_toplevel *toplevel;
+    size_t toplevels_count = 0;
+    wl_list_for_each(toplevel, &output->server->toplevels, link) {
+        if (toplevel->output == output)
+            toplevels_count++;
+    }
+
+
+    if (toplevels_count < 1)
+        return;
+
+    int32_t bw = ABSINTHE_WINDOW_BORDER_WIDTH;
+    int32_t og = ABSINTHE_OUTPUT_GAP;
+
+    if (toplevels_count == 1) {
+        wl_list_for_each(toplevel, &output->server->toplevels, link) {
+            if (toplevel->output == output)
+                break;
+        }
+
+        wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel,
+                                  output->geometry.width - 2 * bw - 2 * og,
+                                  output->geometry.height - 2 * bw - 2 * og);
+        toplevel->geometry.x = output->geometry.x + og;
+        toplevel->geometry.y = output->geometry.y + og;
+        return;
+    }
+
+    int32_t w, h;
+    int32_t lg = ABSINTHE_LAYOUT_GAP;
+    int32_t mw = ABSINTHE_MAIN_TOPLEVEL_WIDTH * (output->geometry.width - 2 * og);
+    int32_t ty = og;
+    size_t i = 0;
+    wl_list_for_each(toplevel, &output->server->toplevels, link) {
+        if (toplevel->output != output)
+            continue;
+
+        if (i == 0) {
+            h = output->geometry.height - 2 * bw - 2 * og;
+            wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel, mw, h);
+            toplevel->geometry.x = output->geometry.x + og;
+            toplevel->geometry.y = output->geometry.y + og;
+        } else {
+            w = output->geometry.width - mw - 2 * bw - 2 * lg - 2 * og;
+            h = (output->geometry.height - ty - og) / (toplevels_count - i) - 2 * bw;
+            wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel, w, h);
+            toplevel->geometry.x = output->geometry.x + mw + lg + og;
+            toplevel->geometry.y = output->geometry.y + ty;
+            ty += h + 2 * bw + lg;
+        }
+
+        i++;
+    }
+}

src/server.c

@@ -172,7 +172,7 @@ void server_cursor_button(struct wl_listener *listener, void *data)
             int32_t lx, ly;
             wlr_scene_node_coords(&toplevel->scene_tree->node, &lx, &ly);
             server->grabbed_geometry.x = lx;
-            server->grabbed_geometry.y = ly;
+           server->grabbed_geometry.y = ly;
             server->grabbed_geometry.width = toplevel->geometry.width;
             server->grabbed_geometry.height = toplevel->geometry.height;
 

src/xdg-toplevel.c

@@ -5,8 +5,10 @@
 #include <wlr/util/log.h>
 
 #include "types.h"
-#include "xdg-decoration.h"
 #include "absinthe-toplevel.h"
+#include "layout.h"
+#include "output.h"
+#include "xdg-decoration.h"
 
 void xdg_toplevel_commit(struct wl_listener *listener, void *data)
 {
@@ -18,7 +20,7 @@ void xdg_toplevel_commit(struct wl_listener *listener, void *data)
             xdg_decoration_request_mode(&toplevel->decoration_request_mode, toplevel->decoration);
 
         // Let toplevel set preferred size
-        wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel, 0, 0);
+        // wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel, 0, 0);
     } else {
         // Check for size because we did't set it on initial commit
         int32_t bw = toplevel->border_width;
@@ -42,11 +44,14 @@ void xdg_toplevel_map(struct wl_listener *listener, void *data)
 
     toplevel->border_width = ABSINTHE_WINDOW_BORDER_WIDTH;
 
+    update_focused_output(toplevel->server);
     toplevel->output = toplevel->server->focused_output;
     toplevel->fullscreen = false;
 
     wl_list_insert(&toplevel->server->toplevels, &toplevel->link);
     wl_list_insert(&toplevel->server->focus_stack, &toplevel->flink);
+
+    layout_arrange(toplevel->output);
 }
 
 void xdg_toplevel_unmap(struct wl_listener *listener, void *data)
@@ -57,6 +62,8 @@ void xdg_toplevel_unmap(struct wl_listener *listener, void *data)
 
     wl_list_remove(&toplevel->link);
     wl_list_remove(&toplevel->flink);
+
+    layout_arrange(toplevel->output);
 }
 
 void xdg_toplevel_destroy(struct wl_listener *listener, void *data)