2.5

Fun commit for test: the Repeat Last option.
Only the split-area Operator is now added on stack, so that's the only 
one that works. Just split an area, and press F4 to repeat it anywhere.

source/blender/editors/include/ED_screen.h

@@ -43,7 +43,7 @@ void	ED_region_do_listen(ARegion *ar, struct wmNotifier *note);
 void	ED_region_do_draw(struct bContext *C, ARegion *ar);
 void	ED_region_do_refresh(struct bContext *C, ARegion *ar);
 void	ED_region_exit(struct bContext *C, ARegion *ar);
-void	ED_region_pixelspace(struct bContext *C, ARegion *ar);
+void	ED_region_pixelspace(const struct bContext *C, ARegion *ar);
 
 /* spaces */
 void	ED_spacetypes_init(void);

source/blender/editors/screen/area.c

@@ -90,7 +90,7 @@ static void region_draw_emboss(ARegion *ar)
 	glDisable( GL_BLEND );
 }
 
-void ED_region_pixelspace(bContext *C, ARegion *ar)
+void ED_region_pixelspace(const bContext *C, ARegion *ar)
 {
 	int width= ar->winrct.xmax-ar->winrct.xmin+1;
 	int height= ar->winrct.ymax-ar->winrct.ymin+1;

source/blender/editors/screen/screen_ops.c

@@ -678,7 +678,8 @@ typedef struct sAreaSplitData
 	int origval;			/* for move areas */
 	int bigger, smaller;	/* constraints for moving new edge */
 	int delta;				/* delta move edge */
-	
+	int origmin, origsize;	/* to calculate fac, for property storage */
+
 	ScrEdge *nedge;			/* new edge */
 	ScrArea *sarea;			/* start area */
 	ScrArea *narea;			/* new area */
@@ -705,6 +706,8 @@ static int area_split_init(bContext *C, wmOperator *op)
 	op->customdata= sd;
 	
 	sd->sarea= C->area;
+	sd->origsize= dir=='v' ? C->area->winx:C->area->winy;
+	sd->origmin = dir=='v' ? C->area->totrct.xmin:C->area->totrct.ymin;
 	
 	return 1;
 }
@@ -877,6 +880,7 @@ static int area_split_cancel(bContext *C, wmOperator *op)
 static int area_split_modal(bContext *C, wmOperator *op, wmEvent *event)
 {
 	sAreaSplitData *sd= (sAreaSplitData *)op->customdata;
+	float fac;
 	int dir;
 
 	/* execute the events */
@@ -887,6 +891,9 @@ static int area_split_modal(bContext *C, wmOperator *op, wmEvent *event)
 			sd->delta= (dir == 'v')? event->x - sd->origval: event->y - sd->origval;
 			area_move_apply_do(C, sd->origval, sd->delta, dir, sd->bigger, sd->smaller);
 			
+			fac= (dir == 'v') ? event->x-sd->origmin : event->y-sd->origmin;
+			RNA_float_set(op->ptr, "fac", fac / (float)sd->origsize);
+			
 			WM_event_add_notifier(C, WM_NOTE_SCREEN_CHANGED, 0, NULL);
 			break;
 			
@@ -920,7 +927,8 @@ void ED_SCR_OT_area_split(wmOperatorType *ot)
 	ot->modal= area_split_modal;
 	
 	ot->poll= ED_operator_areaactive;
-
+	ot->flag= OPTYPE_REGISTER;
+	
 	/* rna */
 	prop= RNA_def_property(ot->srna, "dir", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_items(prop, prop_direction_items);
@@ -1210,6 +1218,33 @@ void ED_SCR_OT_area_join(wmOperatorType *ot)
 	RNA_def_property_int_default(prop, -100);
 }
 
+/* ************** repeat last operator ***************************** */
+
+static int repeat_last_exec(bContext *C, wmOperator *op)
+{
+	wmOperator *lastop= C->wm->operators.last;
+	
+	if(lastop) {
+		printf("repeat %s\n", op->type->idname);
+		lastop->type->exec(C, lastop);
+	}
+	
+	return OPERATOR_FINISHED;
+}
+
+void ED_SCR_OT_repeat_last(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Repeat Last";
+	ot->idname= "ED_SCR_OT_repeat_last";
+	
+	/* api callbacks */
+	ot->exec= repeat_last_exec;
+	
+	ot->poll= ED_operator_screenactive;
+	
+}
+
 /* ************** border select operator (template) ***************************** */
 
 /* operator state vars used: (added by default WM callbacks)   
@@ -1276,6 +1311,7 @@ void ED_operatortypes_screen(void)
 	/* generic UI stuff */
 	WM_operatortype_append(ED_SCR_OT_cursor_type);
 	WM_operatortype_append(ED_SCR_OT_actionzone);
+	WM_operatortype_append(ED_SCR_OT_repeat_last);
 	
 	/* screen tools */
 	WM_operatortype_append(ED_SCR_OT_area_move);
@@ -1302,5 +1338,6 @@ void ED_keymap_screen(wmWindowManager *wm)
 	WM_keymap_verify_item(&wm->screenkeymap, "ED_SCR_OT_area_join", EVT_ACTIONZONE, 0, 0, 0);	/* action tria */ 
 	WM_keymap_verify_item(&wm->screenkeymap, "ED_SCR_OT_area_rip", RKEY, KM_PRESS, KM_ALT, 0);
 
+	WM_keymap_verify_item(&wm->screenkeymap, "ED_SCR_OT_repeat_last", F4KEY, KM_PRESS, 0, 0);
 }
 

source/blender/editors/space_time/time_ops.c

@@ -85,7 +85,7 @@ static void change_frame_apply(bContext *C, wmOperator *op)
 	if(cfra!=CFRA)
 		CFRA= cfra;
 	
-	WM_event_add_notifier(C, WM_NOTE_SCREEN_CHANGED, 0, NULL);
+	WM_event_add_notifier(C, WM_NOTE_WINDOW_REDRAW, 0, NULL);
 	/* XXX: add WM_NOTE_TIME_CHANGED? */
 }
 

source/blender/windowmanager/intern/wm.c

@@ -75,8 +75,8 @@ void wm_operator_register(wmWindowManager *wm, wmOperator *op)
 	int tot;
 
 	if(op->ptr) {
-		MEM_freeN(op->ptr);
-		op->ptr= NULL;
+	//	MEM_freeN(op->ptr);
+	//	op->ptr= NULL;
 	}
 	
 	BLI_addtail(&wm->operators, op);

source/blender/windowmanager/intern/wm_event_system.c

@@ -602,21 +602,14 @@ void WM_event_set_handler_flag(wmEventHandler *handler, int flag)
 
 wmEventHandler *WM_event_add_modal_handler(bContext *C, ListBase *handlers, wmOperator *op)
 {
-	/* debug test; operator not in registry */
-	if(op->type->flag & OPTYPE_REGISTER) {
-		printf("error: handler (%s) cannot be modal, was registered\n", op->type->idname);
-	}
-	else {
-		wmEventHandler *handler= MEM_callocN(sizeof(wmEventHandler), "event handler");
-		handler->op= op;
-		handler->op_area= C->area;		/* means frozen screen context for modal handlers! */
-		handler->op_region= C->region;
-		
-		BLI_addhead(handlers, handler);
-		
-		return handler;
-	}
-	return NULL;
+	wmEventHandler *handler= MEM_callocN(sizeof(wmEventHandler), "event handler");
+	handler->op= op;
+	handler->op_area= C->area;		/* means frozen screen context for modal handlers! */
+	handler->op_region= C->region;
+	
+	BLI_addhead(handlers, handler);
+	
+	return handler;
 }
 
 wmEventHandler *WM_event_add_keymap_handler(ListBase *handlers, ListBase *keymap)