UV: add rip tool

New rip tool matching edit-mesh rip functionality.

Useful as disconnecting UV's, especially for loops is inconvenient
without this.

This uses 'V' to rip, changing stitch to 'Alt-V'.

release/scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -867,7 +867,8 @@ def km_uv_editor(params):
         *_template_items_select_actions(params, "uv.select_all"),
         ("uv.select_pinned", {"type": 'P', "value": 'PRESS', "shift": True}, None),
         op_menu("IMAGE_MT_uvs_weldalign", {"type": 'W', "value": 'PRESS', "shift": True}),
-        ("uv.stitch", {"type": 'V', "value": 'PRESS'}, None),
+        ("uv.stitch", {"type": 'V', "value": 'PRESS', "alt": True}, None),
+        ("uv.rip_move", {"type": 'V', "value": 'PRESS'}, None),
         ("uv.pin", {"type": 'P', "value": 'PRESS'},
          {"properties": [("clear", False)]}),
         ("uv.pin", {"type": 'P', "value": 'PRESS', "alt": True},

source/blender/editors/include/ED_uvedit.h

@@ -47,6 +47,7 @@ struct wmKeyConfig;
 
 /* uvedit_ops.c */
 void ED_operatortypes_uvedit(void);
+void ED_operatormacros_uvedit(void);
 void ED_keymap_uvedit(struct wmKeyConfig *keyconf);
 
 bool ED_uvedit_minmax(const struct Scene *scene,

source/blender/editors/space_api/spacetypes.c

@@ -159,6 +159,7 @@ void ED_spacemacros_init(void)
    * We need to have them go after python operators too */
   ED_operatormacros_armature();
   ED_operatormacros_mesh();
+  ED_operatormacros_uvedit();
   ED_operatormacros_metaball();
   ED_operatormacros_node();
   ED_operatormacros_object();

source/blender/editors/uvedit/CMakeLists.txt

@@ -39,6 +39,7 @@ set(SRC
   uvedit_buttons.c
   uvedit_draw.c
   uvedit_ops.c
+  uvedit_rip.c
   uvedit_parametrizer.c
   uvedit_select.c
   uvedit_smart_stitch.c

source/blender/editors/uvedit/uvedit_intern.h

@@ -106,6 +106,7 @@ void UV_OT_pack_islands(struct wmOperatorType *ot);
 void UV_OT_reset(struct wmOperatorType *ot);
 void UV_OT_sphere_project(struct wmOperatorType *ot);
 void UV_OT_unwrap(struct wmOperatorType *ot);
+void UV_OT_rip(struct wmOperatorType *ot);
 void UV_OT_stitch(struct wmOperatorType *ot);
 
 /* uvedit_select.c */

source/blender/editors/uvedit/uvedit_ops.c

@@ -2087,6 +2087,7 @@ void ED_operatortypes_uvedit(void)
 
   WM_operatortype_append(UV_OT_align);
 
+  WM_operatortype_append(UV_OT_rip);
   WM_operatortype_append(UV_OT_stitch);
 
   WM_operatortype_append(UV_OT_seams_from_islands);
@@ -2111,6 +2112,21 @@ void ED_operatortypes_uvedit(void)
   WM_operatortype_append(UV_OT_cursor_set);
 }
 
+void ED_operatormacros_uvedit(void)
+{
+  wmOperatorType *ot;
+  wmOperatorTypeMacro *otmacro;
+
+  ot = WM_operatortype_append_macro("UV_OT_rip_move",
+                                    "UV Rip Move",
+                                    "unstitch UV's and move the result",
+                                    OPTYPE_UNDO | OPTYPE_REGISTER);
+  WM_operatortype_macro_define(ot, "UV_OT_rip");
+  otmacro = WM_operatortype_macro_define(ot, "TRANSFORM_OT_translate");
+  RNA_enum_set(otmacro->ptr, "proportional", 0);
+  RNA_boolean_set(otmacro->ptr, "mirror", false);
+}
+
 void ED_keymap_uvedit(wmKeyConfig *keyconf)
 {
   wmKeyMap *keymap;