Implement resize command

Syntax: resize <left|right|up|down> [+|-]<pixels>

include/resize.h

@@ -24,5 +24,13 @@ typedef enum { O_HORIZONTAL, O_VERTICAL } resize_orientation_t;
 int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first,
                              int second, resize_orientation_t orientation,
                              xcb_button_press_event_t *event);
+/**
+ * Resizes a column/row by the given amount of pixels. Called by
+ * resize_graphical_handler (the user clicked) or parse_resize_command (the
+ * user issued the command)
+ *
+ */
+void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second,
+                      resize_orientation_t orientation, int pixels);
 
 #endif

src/commands.c

@@ -29,6 +29,7 @@
 #include "config.h"
 #include "workspace.h"
 #include "commands.h"
+#include "resize.h"
 
 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
         /* If this container is empty, we’re done */
@@ -810,6 +811,55 @@ static void next_previous_workspace(xcb_connection_t *conn, int direction) {
                 workspace_show(conn, i+1);
 }
 
+static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
+        int first, second;
+        resize_orientation_t orientation = O_VERTICAL;
+        Container *con = last_focused->container;
+
+        if (STARTS_WITH(command, "left")) {
+                if (con->col == 0)
+                        return;
+                first = con->col - 1;
+                second = con->col;
+                command += strlen("left");
+        } else if (STARTS_WITH(command, "right")) {
+                first = con->col + (con->colspan - 1);
+                LOG("column %d\n", first);
+
+                if (!cell_exists(first, con->row) ||
+                    (first == (con->workspace->cols-1)))
+                        return;
+
+                second = first + 1;
+                command += strlen("right");
+        } else if (STARTS_WITH(command, "top")) {
+                if (con->row == 0)
+                        return;
+                first = con->row - 1;
+                second = con->row;
+                orientation = O_HORIZONTAL;
+                command += strlen("top");
+        } else if (STARTS_WITH(command, "bottom")) {
+                first = con->row + (con->rowspan - 1);
+                if (!cell_exists(con->col, first) ||
+                    (first == (con->workspace->rows-1)))
+                        return;
+
+                second = first + 1;
+                orientation = O_HORIZONTAL;
+                command += strlen("bottom");
+        } else {
+                LOG("Syntax: resize <left|right|up|down> [+|-]<pixels>\n");
+                return;
+        }
+
+        int pixels = atoi(command);
+        if (pixels == 0)
+                return;
+
+        resize_container(conn, con->workspace, first, second, orientation, pixels);
+}
+
 /*
  * Parses a command, see file CMDMODE for more information
  *
@@ -889,6 +939,14 @@ void parse_command(xcb_connection_t *conn, const char *command) {
                 return;
         }
 
+        if (STARTS_WITH(command, "resize ")) {
+                if (last_focused == NULL)
+                        return;
+                const char *rest = command + strlen("resize ");
+                parse_resize_command(conn, last_focused, rest);
+                return;
+        }
+
         /* Is it an <exit>? */
         if (STARTS_WITH(command, "exit")) {
                 LOG("User issued exit-command, exiting without error.\n");

src/resize.c

@@ -126,14 +126,26 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
         xcb_destroy_window(conn, grabwin);
         xcb_flush(conn);
 
+        int pixels;
+        if (orientation == O_VERTICAL)
+                pixels = (new_position - event->root_x);
+        else pixels = (new_position - event->root_y);
+        resize_container(conn, ws, first, second, orientation, pixels);
+
+        return 1;
+}
+
+/*
+ * Resizes a column/row by the given amount of pixels. Called by
+ * resize_graphical_handler (the user clicked) or parse_resize_command (the
+ * user issued the command)
+ *
+ */
+void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second,
+                      resize_orientation_t orientation, int pixels) {
+
         /* 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) {
-                        LOG("Nothing changed, not updating anything\n");
-                        return 1;
-                }
-
                 int default_width = ws->rect.width / ws->cols;
                 int old_unoccupied_x = get_unoccupied_x(ws);
 
@@ -174,8 +186,8 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
 
                 LOG("middle = %f\n", ws->width_factor[first]);
                 int old_width = ws->width_factor[first] * old_unoccupied_x;
-                LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
+                LOG("first->width = %d, pixels = %d\n", pixels);
-                ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
+                ws->width_factor[first] *= (float)(old_width + pixels) / old_width;
                 LOG("-> %f\n", ws->width_factor[first]);
 
 
@@ -184,20 +196,14 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
                 LOG("middle = %f\n", ws->width_factor[second]);
                 old_width = ws->width_factor[second] * old_unoccupied_x;
-                LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
+                LOG("second->width = %d, pixels = %d\n", pixels);
-                ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
+                ws->width_factor[second] *= (float)(old_width - pixels) / old_width;
                 LOG("-> %f\n", ws->width_factor[second]);
 
                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 
                 LOG("\n\n\n");
         } else {
-                LOG("Resize was from X = %d to X = %d\n", event->root_y, new_position);
-                if (event->root_y == new_position) {
-                        LOG("Nothing changed, not updating anything\n");
-                        return 1;
-                }
-
                 int default_height = ws->rect.height / ws->rows;
                 int old_unoccupied_y = get_unoccupied_y(ws);
 
@@ -238,8 +244,8 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
 
                 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);
+                LOG("first->width = %d, pixels = %d\n", pixels);
-                ws->height_factor[first] *= (float)(old_height + (new_position - event->root_y)) / old_height;
+                ws->height_factor[first] *= (float)(old_height + pixels) / old_height;
                 LOG("-> %f\n", ws->height_factor[first]);
 
 
@@ -248,8 +254,8 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
                         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);
+                LOG("second->width = %d, pixels = %d\n", pixels);
-                ws->height_factor[second] *= (float)(old_height - (new_position - event->root_y)) / old_height;
+                ws->height_factor[second] *= (float)(old_height - pixels) / old_height;
                 LOG("-> %f\n", ws->height_factor[second]);
 
                 LOG("new unoccupied_y = %d\n", get_unoccupied_y(ws));
@@ -258,6 +264,4 @@ int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, i
         }
 
         render_layout(conn);
-
-        return 1;
 }