From 96e40fef46b923625c419bf2aa687c8bd25260da Mon Sep 17 00:00:00 2001
From: Lukas Toenne <lukas.toenne@gmail.com>
Date: Thu, 20 Dec 2018 13:29:01 +0000
Subject: Fix tool system integration of hair edit brushes.

---
 source/blender/makesrna/RNA_enum_types.h           |  1 +
 source/blender/makesrna/intern/rna_sculpt_paint.c  | 12 ++++-----
 .../blender/windowmanager/intern/wm_toolsystem.c   | 30 ++++++++++++++++++++++
 3 files changed, 37 insertions(+), 6 deletions(-)

diff --git a/source/blender/makesrna/RNA_enum_types.h b/source/blender/makesrna/RNA_enum_types.h
index f2eaa9d075f..735dca17822 100644
--- a/source/blender/makesrna/RNA_enum_types.h
+++ b/source/blender/makesrna/RNA_enum_types.h
@@ -128,6 +128,7 @@ extern const EnumPropertyItem rna_enum_brush_image_tool_items[];
 
 extern const EnumPropertyItem rna_enum_particle_edit_hair_brush_items[];
 extern const EnumPropertyItem rna_enum_particle_edit_disconnected_hair_brush_items[];
+extern const EnumPropertyItem rna_enum_hair_edit_brush_items[];
 extern const EnumPropertyItem rna_enum_gpencil_sculpt_brush_items[];
 extern const EnumPropertyItem rna_enum_gpencil_weight_brush_items[];
 
diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index 08248d8542a..f19a30d66a3 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -65,6 +65,11 @@ const EnumPropertyItem rna_enum_particle_edit_hair_brush_items[] = {
 	{0, NULL, 0, NULL, NULL}
 };
 
+const EnumPropertyItem rna_enum_hair_edit_brush_items[] = {
+	{HAIR_BRUSH_ADD, "ADD", 0, "Add", "Add hairs"},
+	{0, NULL, 0, NULL, NULL}
+};
+
 const EnumPropertyItem rna_enum_gpencil_sculpt_brush_items[] = {
 	{GP_SCULPT_TYPE_SMOOTH, "SMOOTH", ICON_GPBRUSH_SMOOTH, "Smooth", "Smooth stroke points"},
 	{GP_SCULPT_TYPE_THICKNESS, "THICKNESS", ICON_GPBRUSH_THICKNESS, "Thickness", "Adjust thickness of strokes"},
@@ -1216,11 +1221,6 @@ static void rna_def_hair_edit_settings(BlenderRNA *brna)
 	StructRNA *srna;
 	PropertyRNA *prop;
 
-	static const EnumPropertyItem hair_brush_items[] = {
-		{HAIR_BRUSH_ADD, "ADD", 0, "Add", "Add hairs"},
-		{0, NULL, 0, NULL, NULL}
-	};
-
 	static const EnumPropertyItem select_mode_items[] = {
 	    {HAIR_SELECT_FOLLICLES, "FOLLICLES", ICON_NONE, "Follicles", "Select hair follicles"},
 	    {HAIR_SELECT_VERTICES, "VERTICES", ICON_NONE, "Vertices", "Select hair curve vertices"},
@@ -1242,7 +1242,7 @@ static void rna_def_hair_edit_settings(BlenderRNA *brna)
 
 	prop = RNA_def_property(srna, "tool", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "brushtype");
-	RNA_def_property_enum_items(prop, hair_brush_items);
+	RNA_def_property_enum_items(prop, rna_enum_hair_edit_brush_items);
 	RNA_def_property_ui_text(prop, "Tool", "");
 
 	prop = RNA_def_property(srna, "select_mode", PROP_ENUM, PROP_NONE);
diff --git a/source/blender/windowmanager/intern/wm_toolsystem.c b/source/blender/windowmanager/intern/wm_toolsystem.c
index ef8a57a1255..49d4b4e52cb 100644
--- a/source/blender/windowmanager/intern/wm_toolsystem.c
+++ b/source/blender/windowmanager/intern/wm_toolsystem.c
@@ -255,6 +255,23 @@ static void toolsystem_ref_link(bContext *C, WorkSpace *workspace, bToolRef *tre
 				}
 			}
 		}
+		else if ((tref->space_type == SPACE_VIEW3D) &&
+		         (tref->mode == CTX_MODE_EDIT_HAIR))
+		{
+			const EnumPropertyItem *items = rna_enum_hair_edit_brush_items;
+			const int i = RNA_enum_from_identifier(items, tref_rt->data_block);
+			if (i != -1) {
+				const int value = items[i].value;
+				wmWindowManager *wm = bmain->wm.first;
+				for (wmWindow *win = wm->windows.first; win; win = win->next) {
+					if (workspace == WM_window_get_active_workspace(win)) {
+						Scene *scene = WM_window_get_active_scene(win);
+						ToolSettings *ts = scene->toolsettings;
+						ts->hair_edit.brushtype = value;
+					}
+				}
+			}
+		}
 		else if ((tref->space_type == SPACE_IMAGE) &&
 		         (tref->mode == SI_MODE_UV))
 		{
@@ -509,6 +526,19 @@ void WM_toolsystem_ref_sync_from_context(
 				}
 			}
 		}
+		else if ((tref->space_type == SPACE_VIEW3D) &&
+		         (tref->mode == CTX_MODE_EDIT_HAIR))
+		{
+			if (ob->mode & OB_MODE_EDIT) {
+				const EnumPropertyItem *items = rna_enum_hair_edit_brush_items;
+				const int i = RNA_enum_from_value(items, ts->hair_edit.brushtype);
+				const EnumPropertyItem *item = &items[i];
+				if (!STREQ(tref_rt->data_block, item->identifier)) {
+					STRNCPY(tref_rt->data_block, item->identifier);
+					STRNCPY(tref->idname, item->name);
+				}
+			}
+		}
 		else if ((tref->space_type == SPACE_IMAGE) &&
 		         (tref->mode == SI_MODE_UV))
 		{
-- 
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