move and resize floating windows with keyboard

This allows for an almost completely mouse-free operation of scrotwm,
which is especially useful on systems with crappy mice.

From: Lawrence Teo <lteo@devio.us>

scrotwm.1

@@ -416,6 +416,22 @@ uniconify
 always_raise
 .It Cm M-v
 button2
+.It Cm M--
+width_shrink
+.It Cm M-=
+width_grow
+.It Cm M-S-
+height_shrink
+.It Cm M-S-=
+height_grow
+.It Cm M-[
+move_left
+.It Cm M-]
+move_right
+.It Cm M-S-[
+move_up
+.It Cm M-S-]
+move_down
 .El
 .Pp
 The action names and descriptions are listed below:
@@ -525,6 +541,22 @@ Maximize (map) window returned by dmenu selection.
 When set tiled windows are allowed to obscure floating windows.
 .It Cm button2
 Fake a middle mouse button click (mouse button 2).
+.It Cm width_shrink
+Shrink the width of a floating window.
+.It Cm width_grow
+Grow the width of a floating window.
+.It Cm height_shrink
+Shrink the height of a floating window.
+.It Cm height_grow
+Grow the height of a floating window.
+.It Cm move_left
+Move a floating window a step to the left.
+.It Cm move_right
+Move a floating window a step to the right.
+.It Cm move_up
+Move a floating window a step upwards.
+.It Cm move_down
+Move a floating window a step downwards.
 .El
 .Pp
 Custom bindings in the configuration file are specified as follows:

scrotwm.c

@@ -420,6 +420,14 @@ union arg {
 #define SWM_ARG_ID_CENTER	(71)
 #define SWM_ARG_ID_KILLWINDOW	(80)
 #define SWM_ARG_ID_DELETEWINDOW	(81)
+#define SWM_ARG_ID_WIDTHGROW	(90)
+#define SWM_ARG_ID_WIDTHSHRINK	(91)
+#define SWM_ARG_ID_HEIGHTGROW	(92)
+#define SWM_ARG_ID_HEIGHTSHRINK	(93)
+#define SWM_ARG_ID_MOVEUP	(100)
+#define SWM_ARG_ID_MOVEDOWN	(101)
+#define SWM_ARG_ID_MOVELEFT	(102)
+#define SWM_ARG_ID_MOVERIGHT	(103)
 	char			**argv;
 };
 
@@ -3338,6 +3346,8 @@ resize_window(struct ws_win *win, int center)
 	XConfigureWindow(display, win->id, mask, &wc);
 }
 
+#define SWM_RESIZE_STEPS	(50)
+
 void
 resize(struct ws_win *win, union arg *args)
 {
@@ -3345,6 +3355,7 @@ resize(struct ws_win *win, union arg *args)
 	Time			time = 0;
 	struct swm_region	*r = win->ws->r;
 	int			relx, rely;
+	int			resize_step = 0;
 
 
 	DNPRINTF(SWM_D_MOUSE, "resize: win %lu floating %d trans %lu\n",
@@ -3362,6 +3373,33 @@ resize(struct ws_win *win, union arg *args)
 	    _NET_WM_STATE_ADD);
 
 	stack();
+
+	switch (args->id) {
+	case SWM_ARG_ID_WIDTHSHRINK:
+		win->g.w -= SWM_RESIZE_STEPS;
+		resize_step = 1;
+		break;
+	case SWM_ARG_ID_WIDTHGROW:
+		win->g.w += SWM_RESIZE_STEPS;
+		resize_step = 1;
+		break;
+	case SWM_ARG_ID_HEIGHTSHRINK:
+		win->g.h -= SWM_RESIZE_STEPS;
+		resize_step = 1;
+		break;
+	case SWM_ARG_ID_HEIGHTGROW:
+		win->g.h += SWM_RESIZE_STEPS;
+		resize_step = 1;
+		break;
+	default:
+		break;
+	}
+	if (resize_step) {
+		resize_window(win, 0);
+		store_float_geom(win,r);
+		return;
+	}
+
 	if (focus_mode == SWM_FOCUS_DEFAULT)
 		drain_enter_notify();
 
@@ -3428,6 +3466,20 @@ resize(struct ws_win *win, union arg *args)
 	drain_enter_notify();
 }
 
+void
+resize_step(struct swm_region *r, union arg *args)
+{
+	struct ws_win		*win = NULL;
+
+	if (r && r->ws)
+		win = r->ws->focus;
+	else
+		return;
+
+	resize(win, args);
+}
+
+
 void
 move_window(struct ws_win *win)
 {
@@ -3448,11 +3500,14 @@ move_window(struct ws_win *win)
 	XConfigureWindow(display, win->id, mask, &wc);
 }
 
+#define SWM_MOVE_STEPS	(50)
+
 void
 move(struct ws_win *win, union arg *args)
 {
 	XEvent			ev;
 	Time			time = 0;
+	int			move_step = 0;
 	struct swm_region	*r = win->ws->r;
 
 	DNPRINTF(SWM_D_MOUSE, "move: win %lu floating %d trans %lu\n",
@@ -3472,6 +3527,34 @@ move(struct ws_win *win, union arg *args)
 
 	stack();
 
+	move_step = 0;
+	switch (args->id) {
+	case SWM_ARG_ID_MOVELEFT:
+		win->g.x -= (SWM_MOVE_STEPS - border_width);
+		move_step = 1;
+		break;
+	case SWM_ARG_ID_MOVERIGHT:
+		win->g.x += (SWM_MOVE_STEPS - border_width);
+		move_step = 1;
+		break;
+	case SWM_ARG_ID_MOVEUP:
+		win->g.y -= (SWM_MOVE_STEPS - border_width);
+		move_step = 1;
+		break;
+	case SWM_ARG_ID_MOVEDOWN:
+		win->g.y += (SWM_MOVE_STEPS - border_width);
+		move_step = 1;
+		break;
+	default:
+		break;
+	}
+	if (move_step) {
+		move_window(win);
+		store_float_geom(win,r);
+		return;
+	}
+
+
 	if (XGrabPointer(display, win->id, False, MOUSEMASK, GrabModeAsync,
 	    GrabModeAsync, None, None /* cursor */, CurrentTime) != GrabSuccess)
 		return;
@@ -3517,6 +3600,23 @@ move(struct ws_win *win, union arg *args)
 	drain_enter_notify();
 }
 
+void
+move_step(struct swm_region *r, union arg *args)
+{
+	struct ws_win		*win = NULL;
+
+	if (r && r->ws)
+		win = r->ws->focus;
+	else
+		return;
+
+	if (!(win->transient != 0 || win->floating != 0))
+		return;
+
+	move(win, args);
+}
+
+
 /* user/key callable function IDs */
 enum keyfuncid {
 	kf_cycle_layout,
@@ -3576,6 +3676,14 @@ enum keyfuncid {
 	kf_uniconify,
 	kf_raise_toggle,
 	kf_button2,
+	kf_width_shrink,
+	kf_width_grow,
+	kf_height_shrink,
+	kf_height_grow,
+	kf_move_left,
+	kf_move_right,
+	kf_move_up,
+	kf_move_down,
 	kf_dumpwins, /* MUST BE LAST */
 	kf_invalid
 };
@@ -3654,6 +3762,14 @@ struct keyfunc {
 	{ "uniconify",		uniconify,	{0} },
 	{ "raise_toggle",	raise_toggle,	{0} },
 	{ "button2",		pressbutton,	{2} },
+	{ "width_shrink",	resize_step,	{.id = SWM_ARG_ID_WIDTHSHRINK} },
+	{ "width_grow",		resize_step,	{.id = SWM_ARG_ID_WIDTHGROW} },
+	{ "height_shrink",	resize_step,	{.id = SWM_ARG_ID_HEIGHTSHRINK} },
+	{ "height_grow",	resize_step,	{.id = SWM_ARG_ID_HEIGHTGROW} },
+	{ "move_left",		move_step,	{.id = SWM_ARG_ID_MOVELEFT} },
+	{ "move_right",		move_step,	{.id = SWM_ARG_ID_MOVERIGHT} },
+	{ "move_up",		move_step,	{.id = SWM_ARG_ID_MOVEUP} },
+	{ "move_down",		move_step,	{.id = SWM_ARG_ID_MOVEDOWN} },
 	{ "dumpwins",		dumpwins,	{0} }, /* MUST BE LAST */
 	{ "invalid key func",	NULL,		{0} },
 };
@@ -4203,7 +4319,7 @@ setup_keys(void)
 	setkeybinding(MODKEY|ShiftMask,	XK_j,		kf_swap_next,	NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_k,		kf_swap_prev,	NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_Return,	kf_spawn_term,	NULL);
-	setkeybinding(MODKEY,		XK_p,		kf_spawn_custom,	"menu");
+	setkeybinding(MODKEY,		XK_p,		kf_spawn_custom,"menu");
 	setkeybinding(MODKEY|ShiftMask,	XK_q,		kf_quit,	NULL);
 	setkeybinding(MODKEY,		XK_q,		kf_restart,	NULL);
 	setkeybinding(MODKEY,		XK_m,		kf_focus_main,	NULL);
@@ -4237,16 +4353,24 @@ setup_keys(void)
 	setkeybinding(MODKEY|ShiftMask,	XK_Tab,		kf_focus_prev,	NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_x,		kf_wind_kill,	NULL);
 	setkeybinding(MODKEY,		XK_x,		kf_wind_del,	NULL);
-	setkeybinding(MODKEY,		XK_s,		kf_spawn_custom,	"screenshot_all");
+	setkeybinding(MODKEY,		XK_s,		kf_spawn_custom,"screenshot_all");
-	setkeybinding(MODKEY|ShiftMask,	XK_s,		kf_spawn_custom,	"screenshot_wind");
+	setkeybinding(MODKEY|ShiftMask,	XK_s,		kf_spawn_custom,"screenshot_wind");
 	setkeybinding(MODKEY,		XK_t,		kf_float_toggle,NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_v,		kf_version,	NULL);
-	setkeybinding(MODKEY|ShiftMask,	XK_Delete,	kf_spawn_custom,	"lock");
+	setkeybinding(MODKEY|ShiftMask,	XK_Delete,	kf_spawn_custom,"lock");
-	setkeybinding(MODKEY|ShiftMask,	XK_i,		kf_spawn_custom,	"initscr");
+	setkeybinding(MODKEY|ShiftMask,	XK_i,		kf_spawn_custom,"initscr");
 	setkeybinding(MODKEY,		XK_w,		kf_iconify,	NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_w,		kf_uniconify,	NULL);
 	setkeybinding(MODKEY|ShiftMask,	XK_r,		kf_raise_toggle,NULL);
 	setkeybinding(MODKEY,		XK_v,		kf_button2,	NULL);
+	setkeybinding(MODKEY,		XK_equal,	kf_width_grow,	NULL);
+	setkeybinding(MODKEY,		XK_minus,	kf_width_shrink,NULL);
+	setkeybinding(MODKEY|ShiftMask,	XK_equal,	kf_height_grow,	NULL);
+	setkeybinding(MODKEY|ShiftMask,	XK_minus,	kf_height_shrink,NULL);
+	setkeybinding(MODKEY,		XK_bracketleft,	kf_move_left,	NULL);
+	setkeybinding(MODKEY,		XK_bracketright,kf_move_right,	NULL);
+	setkeybinding(MODKEY|ShiftMask,	XK_bracketleft,	kf_move_up,	NULL);
+	setkeybinding(MODKEY|ShiftMask,	XK_bracketright,kf_move_down,	NULL);
 #ifdef SWM_DEBUG
 	setkeybinding(MODKEY|ShiftMask,	XK_d,		kf_dumpwins,	NULL);
 #endif

scrotwm.conf

@@ -118,6 +118,14 @@ dialog_ratio		= 0.6
 #bind[uniconify]	= MOD+Shift+w
 #bind[raise_toggle]	= MOD+Shift+r
 #bind[button2]		= MOD+v
+#bind[width_shrink]	= MOD+-
+#bind[width_grow]	= MOD+=
+#bind[height_shrink]	= MOD+Shift+-
+#bind[height_grow]	= MOD+Shift+=
+#bind[move_left]		= MOD+[
+#bind[move_right]	= MOD+]
+#bind[move_up]		= MOD+Shift+[
+#bind[move_down]		= MOD+Shift+]
 
 # quirks
 # remove with: quirk[class:name] = NONE