Interface: New region type 'Footer', used by text editor

* It can be hidden by dragging it up/down.
* It can be at the top or bottom, independent of the header.
* It uses the color theme from the header.
* It does not change its color, when the area becomes active.

Currently, it is used in the text editor to display the file path.

Differential Revision: https://developer.blender.org/D4601

1 files changed, 104 insertions, 4 deletions

diff --git a/source/blender/editors/screen/screen_ops.c b/source/blender/editors/screen/screen_ops.c
index ed96621a906..09ca0476b10 100644
--- a/source/blender/editors/screen/screen_ops.c
+++ b/source/blender/editors/screen/screen_ops.c
@@ -2317,12 +2317,13 @@ static int area_max_regionsize(ScrArea *sa, ARegion *scalear, AZEdge edge)
 				dist -= ar->winx;
 			}
 			else if (scalear->alignment == RGN_ALIGN_TOP &&
-			         (ar->alignment == RGN_ALIGN_BOTTOM || ar->regiontype == RGN_TYPE_HEADER))
+			         (ar->alignment == RGN_ALIGN_BOTTOM || ELEM(ar->regiontype, RGN_TYPE_HEADER, RGN_TYPE_FOOTER)))
 			{
 				dist -= ar->winy;
 			}
 			else if (scalear->alignment == RGN_ALIGN_BOTTOM &&
-			         (ar->alignment == RGN_ALIGN_TOP || ar->regiontype == RGN_TYPE_HEADER)) {
+			         (ar->alignment == RGN_ALIGN_TOP || ELEM(ar->regiontype, RGN_TYPE_HEADER, RGN_TYPE_FOOTER)))
+			{
 				dist -= ar->winy;
 			}
 		}
@@ -2469,8 +2470,8 @@ static int region_scale_modal(bContext *C, wmOperator *op, const wmEvent *event)
 				}
 				CLAMP(rmd->ar->sizey, 0, rmd->maxsize);
 
-				/* note, 'UI_UNIT_Y/4' means you need to drag the header almost
-				 * all the way down for it to become hidden, this is done
+				/* note, 'UI_UNIT_Y/4' means you need to drag the footer and execute region
+				 * almost all the way down for it to become hidden, this is done
 				 * otherwise its too easy to do this by accident */
 				if (rmd->ar->sizey < UI_UNIT_Y / 4) {
 					rmd->ar->sizey = rmd->origval;
@@ -3850,6 +3851,103 @@ static void SCREEN_OT_header_context_menu(wmOperatorType *ot)
 /** \} */
 
 /* -------------------------------------------------------------------- */
+/** \name Footer Toggle Operator
+ * \{ */
+
+static int footer_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	ARegion *ar = screen_find_region_type(C, RGN_TYPE_FOOTER);
+
+	if (ar == NULL) {
+		return OPERATOR_CANCELLED;
+	}
+
+	ar->flag ^= RGN_FLAG_HIDDEN;
+
+	ED_area_tag_redraw(CTX_wm_area(C));
+
+	WM_event_add_notifier(C, NC_SCREEN | NA_EDITED, NULL);
+
+	return OPERATOR_FINISHED;
+}
+
+static void SCREEN_OT_footer(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Toggle Footer";
+	ot->description = "Toggle footer display";
+	ot->idname = "SCREEN_OT_footer";
+
+	/* api callbacks */
+	ot->exec = footer_exec;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Footer Tools Operator
+ * \{ */
+
+static bool footer_context_menu_poll(bContext *C)
+{
+	ScrArea *sa = CTX_wm_area(C);
+	return sa;
+}
+
+void ED_screens_footer_tools_menu_create(bContext *C, uiLayout *layout, void *UNUSED(arg))
+{
+	ScrArea *sa = CTX_wm_area(C);
+	ARegion *ar = CTX_wm_region(C);
+	const char *but_flip_str = (ar->alignment == RGN_ALIGN_TOP) ? IFACE_("Flip to Bottom") : IFACE_("Flip to Top");
+
+	uiItemO(layout, IFACE_("Toggle Footer"), ICON_NONE, "SCREEN_OT_footer");
+
+	/* default is WM_OP_INVOKE_REGION_WIN, which we don't want here. */
+	uiLayoutSetOperatorContext(layout, WM_OP_INVOKE_DEFAULT);
+
+	uiItemO(layout, but_flip_str, ICON_NONE, "SCREEN_OT_region_flip");
+
+
+	/* file browser should be fullscreen all the time, topbar should
+	 * never be. But other regions can be maximized/restored... */
+	if (!ELEM(sa->spacetype, SPACE_FILE, SPACE_TOPBAR)) {
+		uiItemS(layout);
+
+		const char *but_str = sa->full ? IFACE_("Tile Area") : IFACE_("Maximize Area");
+		uiItemO(layout, but_str, ICON_NONE, "SCREEN_OT_screen_full_area");
+	}
+}
+
+static int footer_context_menu_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent *UNUSED(event))
+{
+	uiPopupMenu *pup;
+	uiLayout *layout;
+
+	pup = UI_popup_menu_begin(C, IFACE_("Footer"), ICON_NONE);
+	layout = UI_popup_menu_layout(pup);
+
+	ED_screens_footer_tools_menu_create(C, layout, NULL);
+
+	UI_popup_menu_end(C, pup);
+
+	return OPERATOR_INTERFACE;
+}
+
+static void SCREEN_OT_footer_context_menu(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Footer Context Menu";
+	ot->description = "Display footer region context menu";
+	ot->idname = "SCREEN_OT_footer_context_menu";
+
+	/* api callbacks */
+	ot->poll = footer_context_menu_poll;
+	ot->invoke = footer_context_menu_invoke;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
 /** \name Navigation Bar Tools Menu
  * \{ */
 
@@ -4968,6 +5066,8 @@ void ED_operatortypes_screen(void)
 	WM_operatortype_append(SCREEN_OT_header);
 	WM_operatortype_append(SCREEN_OT_header_toggle_menus);
 	WM_operatortype_append(SCREEN_OT_header_context_menu);
+	WM_operatortype_append(SCREEN_OT_footer);
+	WM_operatortype_append(SCREEN_OT_footer_context_menu);
 	WM_operatortype_append(SCREEN_OT_screen_set);
 	WM_operatortype_append(SCREEN_OT_screen_full_area);
 	WM_operatortype_append(SCREEN_OT_back_to_previous);