Implement horizontal resize

include/layout.h

@@ -22,6 +22,9 @@
  */
 int get_unoccupied_x(Workspace *workspace);
 
+/** See get_unoccupied_x */
+int get_unoccupied_y(Workspace *workspace);
+
 /**
  * (Re-)draws window decorations for a given Client onto the given
  * drawable/graphic context.  When in stacking mode, the window decorations

src/layout.c

@@ -63,16 +63,27 @@ int get_unoccupied_x(Workspace *workspace) {
 }
 
 /* See get_unoccupied_x() */
-int get_unoccupied_y(Workspace *workspace, int col) {
+int get_unoccupied_y(Workspace *workspace) {
-        int unoccupied = workspace->rect.height;
+        int height = workspace->rect.height;
-        float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
+        i3Font *font = load_font(global_conn, config.font);
+
+        /* Reserve space for dock clients */
+        Client *client;
+        SLIST_FOREACH(client, &(workspace->screen->dock_clients), dock_clients)
+                height -= client->desired_height;
+
+        /* Space for the internal bar */
+        height -= (font->height + 6);
+
+        int unoccupied = height;
+        float default_factor = ((float)height / workspace->rows) / height;
 
         LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
 
         for (int rows = 0; rows < workspace->rows; rows++) {
                 LOG("height_factor[%d] = %f\n", rows, workspace->height_factor[rows]);
                 if (workspace->height_factor[rows] == 0)
-                        unoccupied -= workspace->rect.height * default_factor;
+                        unoccupied -= height * default_factor;
         }
 
         LOG("unoccupied space: %d\n", unoccupied);
@@ -587,7 +598,7 @@ void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws)
         /* Go through the whole table and render what’s necessary */
         FOR_TABLE(r_ws) {
                 Container *container = r_ws->table[cols][rows];
-                int single_width = -1, single_height;
+                int single_width = -1, single_height = -1;
                 /* Update position of the container */
                 container->row = rows;
                 container->col = cols;
@@ -604,11 +615,25 @@ void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws)
                                 single_width = container->width;
                 }
 
+                LOG("height is %d\n", height);
+
+                container->height = 0;
+
+                for (int c = 0; c < container->rowspan; c++) {
+                        if (r_ws->height_factor[rows+c] == 0)
+                                container->height += (height / r_ws->rows);
+                        else container->height += get_unoccupied_y(r_ws) * r_ws->height_factor[rows+c];
+
+                        if (single_height == -1)
+                                single_height = container->height;
+                }
+
+
                 //if (container->height_factor == 0)
-                        container->height = (height / r_ws->rows);
+                        //container->height = (height / r_ws->rows);
                 //else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
-                single_height = container->height;
+                //single_height = container->height;
-                container->height *= container->rowspan;
+                //container->height *= container->rowspan;
 
                 /* Render the container if it is not empty */
                 render_container(conn, container);

src/resize.c

@@ -47,13 +47,6 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
 
         LOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
 
-        /* FIXME: horizontal resizing causes empty spaces to exist */
-        if (orientation == O_HORIZONTAL) {
-                LOG("Sorry, horizontal resizing is not yet activated due to creating layout bugs."
-                    "If you are brave, enable the code for yourself and try fixing it.\n");
-                return 1;
-        }
-
         uint32_t mask = 0;
         uint32_t values[2];
 
@@ -123,6 +116,7 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
         xcb_destroy_window(conn, grabwin);
         xcb_flush(conn);
 
+        /* TODO: refactor this, both blocks are very identical */
         if (orientation == O_VERTICAL) {
                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
                 if (event->root_x == new_position) {
@@ -188,22 +182,69 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
 
                 LOG("\n\n\n");
         } else {
-#if 0
+                LOG("Resize was from X = %d to X = %d\n", event->root_y, new_position);
-                LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
                 if (event->root_y == new_position) {
                         LOG("Nothing changed, not updating anything\n");
                         return 1;
                 }
 
-                /* Convert 0 (for default height_factor) to actual numbers */
+                int default_height = ws->rect.height / ws->rows;
-                if (first->height_factor == 0)
+                int old_unoccupied_y = get_unoccupied_y(ws);
-                        first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
-                if (second->height_factor == 0)
-                        second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 
-                first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
+                /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
-                second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
+                 * doing the resize */
-#endif
+                int new_unoccupied_y = old_unoccupied_y;
+
+                if (old_unoccupied_y == 0)
+                        old_unoccupied_y = ws->rect.height;
+
+                if (ws->height_factor[first] == 0)
+                        new_unoccupied_y += default_height;
+
+                if (ws->height_factor[second] == 0)
+                        new_unoccupied_y += default_height;
+
+                LOG("\n\n\n");
+                LOG("old = %d, new = %d\n", old_unoccupied_y, new_unoccupied_y);
+
+                /* If the space used for customly resized columns has changed we need to adapt the
+                 * other customly resized columns, if any */
+                if (new_unoccupied_y != old_unoccupied_y)
+                        for (int row = 0; row < ws->rows; row++) {
+                                if (ws->height_factor[row] == 0)
+                                        continue;
+
+                                LOG("Updating other column (%d) (current width_factor = %f)\n", row, ws->height_factor[row]);
+                                ws->height_factor[row] = (ws->height_factor[row] * old_unoccupied_y) / new_unoccupied_y;
+                                LOG("to %f\n", ws->height_factor[row]);
+                        }
+
+                LOG("old_unoccupied_y = %d\n", old_unoccupied_y);
+
+                LOG("Updating first (before = %f)\n", ws->height_factor[first]);
+                /* Convert 0 (for default width_factor) to actual numbers */
+                if (ws->height_factor[first] == 0)
+                        ws->height_factor[first] = ((float)ws->rect.height / ws->rows) / new_unoccupied_y;
+
+                LOG("middle = %f\n", ws->height_factor[first]);
+                int old_height = ws->height_factor[first] * old_unoccupied_y;
+                LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_height, new_position, event->root_y);
+                ws->height_factor[first] *= (float)(old_height + (new_position - event->root_y)) / old_height;
+                LOG("-> %f\n", ws->height_factor[first]);
+
+
+                LOG("Updating second (before = %f)\n", ws->height_factor[second]);
+                if (ws->height_factor[second] == 0)
+                        ws->height_factor[second] = ((float)ws->rect.height / ws->rows) / new_unoccupied_y;
+                LOG("middle = %f\n", ws->height_factor[second]);
+                old_height = ws->height_factor[second] * old_unoccupied_y;
+                LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_height, new_position, event->root_y);
+                ws->height_factor[second] *= (float)(old_height - (new_position - event->root_y)) / old_height;
+                LOG("-> %f\n", ws->height_factor[second]);
+
+                LOG("new unoccupied_y = %d\n", get_unoccupied_y(ws));
+
+                LOG("\n\n\n");
         }
 
         render_layout(conn);