Fix lots of missing messages i18n handling in uiItemL calls.

Also fix several wrong usages of `IFACE_` (as a reminder, error/info
messages should use `TIP_`, not `IFACE_`).

source/blender/editors/animation/fmodifier_ui.c

@@ -403,10 +403,10 @@ static void generator_panel_draw(const bContext *C, Panel *panel)
       char xval[32];
 
       /* The first value gets a "Coefficient" label. */
-      BLI_strncpy(xval, "Coefficient", sizeof(xval));
+      BLI_strncpy(xval, N_("Coefficient"), sizeof(xval));
 
       for (int i = 0; i < data->arraysize; i++) {
-        uiItemFullR(col, ptr, prop, i, 0, 0, N_(xval), ICON_NONE);
+        uiItemFullR(col, ptr, prop, i, 0, 0, IFACE_(xval), ICON_NONE);
         BLI_snprintf(xval, sizeof(xval), "x^%d", i + 1);
       }
       break;
@@ -420,17 +420,17 @@ static void generator_panel_draw(const bContext *C, Panel *panel)
         uiLayoutColumn(split, false);
         uiLayout *title_col = uiLayoutColumn(split, false);
         uiLayout *title_row = uiLayoutRow(title_col, true);
-        uiItemL(title_row, N_("A"), ICON_NONE);
+        uiItemL(title_row, IFACE_("A"), ICON_NONE);
-        uiItemL(title_row, N_("B"), ICON_NONE);
+        uiItemL(title_row, IFACE_("B"), ICON_NONE);
       }
 
       uiLayout *first_row = uiLayoutRow(col, true);
-      uiItemFullR(first_row, ptr, prop, 0, 0, 0, N_("y = (Ax + B)"), ICON_NONE);
+      uiItemFullR(first_row, ptr, prop, 0, 0, 0, IFACE_("y = (Ax + B)"), ICON_NONE);
       uiItemFullR(first_row, ptr, prop, 1, 0, 0, "", ICON_NONE);
       for (int i = 2; i < data->arraysize - 1; i++) {
         /* \u2715 is the multiplication symbol. */
         uiLayout *row = uiLayoutRow(col, true);
-        uiItemFullR(row, ptr, prop, i, 0, 0, N_("\u2715 (Ax + B)"), ICON_NONE);
+        uiItemFullR(row, ptr, prop, i, 0, 0, IFACE_("\u2715 (Ax + B)"), ICON_NONE);
         uiItemFullR(row, ptr, prop, i + 1, 0, 0, "", ICON_NONE);
       }
       break;

source/blender/editors/interface/interface.c

@@ -4450,7 +4450,7 @@ static void ui_def_but_rna__panel_type(bContext *C, uiLayout *layout, void *but_
   }
   else {
     char msg[256];
-    SNPRINTF(msg, "Missing Panel: %s", panel_type);
+    SNPRINTF(msg, TIP_("Missing Panel: %s"), panel_type);
     uiItemL(layout, msg, ICON_NONE);
   }
 }
@@ -4479,7 +4479,7 @@ static void ui_def_but_rna__menu_type(bContext *C, uiLayout *layout, void *but_p
   }
   else {
     char msg[256];
-    SNPRINTF(msg, "Missing Menu: %s", menu_type);
+    SNPRINTF(msg, TIP_("Missing Menu: %s"), menu_type);
     uiItemL(layout, msg, ICON_NONE);
   }
 }

source/blender/editors/interface/interface_layout.c

@@ -1339,7 +1339,7 @@ static void ui_item_menu_hold(struct bContext *C, ARegion *butregion, uiBut *but
     UI_menutype_draw(C, mt, layout);
   }
   else {
-    uiItemL(layout, "Menu Missing:", ICON_NONE);
+    uiItemL(layout, TIP_("Menu Missing:"), ICON_NONE);
     uiItemL(layout, menu_id, ICON_NONE);
   }
   UI_popup_menu_end(C, pup);

source/blender/editors/interface/interface_templates.c

@@ -2743,7 +2743,7 @@ static void draw_constraint_header(uiLayout *layout, Object *ob, bConstraint *co
     uiItemR(row, &ptr, "name", 0, "", ICON_NONE);
   }
   else {
-    uiItemL(row, con->name, ICON_NONE);
+    uiItemL(row, IFACE_(con->name), ICON_NONE);
   }
 
   /* proxy-protected constraints cannot be edited, so hide up/down + close buttons */
@@ -6142,8 +6142,8 @@ void uiTemplateInputStatus(uiLayout *layout, struct bContext *C)
     uiLayout *row = uiLayoutRow(col, true);
     uiLayoutSetAlignment(row, UI_LAYOUT_ALIGN_LEFT);
 
-    const char *msg = WM_window_cursor_keymap_status_get(win, i, 0);
+    const char *msg = TIP_(WM_window_cursor_keymap_status_get(win, i, 0));
-    const char *msg_drag = WM_window_cursor_keymap_status_get(win, i, 1);
+    const char *msg_drag = TIP_(WM_window_cursor_keymap_status_get(win, i, 1));
 
     if (msg || (msg_drag == NULL)) {
       uiItemL(row, msg ? msg : "", (ICON_MOUSE_LMB + i));
@@ -6498,12 +6498,15 @@ void uiTemplateCacheFile(uiLayout *layout,
     row = uiLayoutRow(layout, false);
     /* For Cycles, verify that experimental features are enabled. */
     if (BKE_scene_uses_cycles(scene) && !BKE_scene_uses_cycles_experimental_features(scene)) {
-      uiItemL(row,
+      uiItemL(
-              "The Cycles Alembic Procedural is only available with the experimental feature set",
+          row,
-              ICON_INFO);
+          TIP_(
+              "The Cycles Alembic Procedural is only available with the experimental feature set"),
+          ICON_INFO);
     }
     else {
-      uiItemL(row, "The active render engine does not have an Alembic Procedural", ICON_INFO);
+      uiItemL(
+          row, TIP_("The active render engine does not have an Alembic Procedural"), ICON_INFO);
     }
   }
 

source/blender/editors/interface/tree_view.cc

@@ -660,7 +660,7 @@ void BasicTreeViewItem::add_label(uiLayout &layout, StringRefNull label_override
   if (icon == ICON_NONE && !is_collapsible()) {
     uiItemS_ex(&layout, 0.8f);
   }
-  uiItemL(&layout, label.c_str(), icon);
+  uiItemL(&layout, IFACE_(label.c_str()), icon);
 }
 
 void BasicTreeViewItem::on_activate()

source/blender/editors/screen/screen_user_menu.c

@@ -234,7 +234,7 @@ static void screen_user_menu_draw(const bContext *C, Menu *menu)
         }
         else {
           if (show_missing) {
-            SNPRINTF(label, "Missing: %s", umi_op->op_idname);
+            SNPRINTF(label, TIP_("Missing: %s"), umi_op->op_idname);
             uiItemL(menu->layout, label, ICON_NONE);
           }
         }
@@ -248,7 +248,7 @@ static void screen_user_menu_draw(const bContext *C, Menu *menu)
         }
         else {
           if (show_missing) {
-            SNPRINTF(label, "Missing: %s", umi_mt->mt_idname);
+            SNPRINTF(label, TIP_("Missing: %s"), umi_mt->mt_idname);
             uiItemL(menu->layout, label, ICON_NONE);
           }
         }
@@ -290,7 +290,7 @@ static void screen_user_menu_draw(const bContext *C, Menu *menu)
         }
         if (!ok) {
           if (show_missing) {
-            SNPRINTF(label, "Missing: %s.%s", umi_pr->context_data_path, umi_pr->prop_id);
+            SNPRINTF(label, TIP_("Missing: %s.%s"), umi_pr->context_data_path, umi_pr->prop_id);
             uiItemL(menu->layout, label, ICON_NONE);
           }
         }

source/blender/editors/space_graph/graph_buttons.c

@@ -593,17 +593,17 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
   else {
     if ((fcu->bezt == NULL) && (fcu->modifiers.first)) {
       /* modifiers only - so no keyframes to be active */
-      uiItemL(layout, IFACE_("F-Curve only has F-Modifiers"), ICON_NONE);
+      uiItemL(layout, TIP_("F-Curve only has F-Modifiers"), ICON_NONE);
-      uiItemL(layout, IFACE_("See Modifiers panel below"), ICON_INFO);
+      uiItemL(layout, TIP_("See Modifiers panel below"), ICON_INFO);
     }
     else if (fcu->fpt) {
       /* samples only */
       uiItemL(layout,
-              IFACE_("F-Curve doesn't have any keyframes as it only contains sampled points"),
+              TIP_("F-Curve doesn't have any keyframes as it only contains sampled points"),
               ICON_NONE);
     }
     else {
-      uiItemL(layout, IFACE_("No active keyframe on F-Curve"), ICON_NONE);
+      uiItemL(layout, TIP_("No active keyframe on F-Curve"), ICON_NONE);
     }
   }
 
@@ -688,28 +688,30 @@ static void driver_dvar_invalid_name_query_cb(bContext *C, void *dvar_v, void *U
   DriverVar *dvar = (DriverVar *)dvar_v;
 
   if (dvar->flag & DVAR_FLAG_INVALID_EMPTY) {
-    uiItemL(layout, "It cannot be left blank", ICON_ERROR);
+    uiItemL(layout, TIP_("It cannot be left blank"), ICON_ERROR);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_START_NUM) {
-    uiItemL(layout, "It cannot start with a number", ICON_ERROR);
+    uiItemL(layout, TIP_("It cannot start with a number"), ICON_ERROR);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_START_CHAR) {
     uiItemL(layout,
-            "It cannot start with a special character,"
+            TIP_("It cannot start with a special character,"
-            " including '$', '@', '!', '~', '+', '-', '_', '.', or ' '",
+                 " including '$', '@', '!', '~', '+', '-', '_', '.', or ' '"),
             ICON_NONE);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_HAS_SPACE) {
-    uiItemL(layout, "It cannot contain spaces (e.g. 'a space')", ICON_ERROR);
+    uiItemL(layout, TIP_("It cannot contain spaces (e.g. 'a space')"), ICON_ERROR);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_HAS_DOT) {
-    uiItemL(layout, "It cannot contain dots (e.g. 'a.dot')", ICON_ERROR);
+    uiItemL(layout, TIP_("It cannot contain dots (e.g. 'a.dot')"), ICON_ERROR);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_HAS_SPECIAL) {
-    uiItemL(layout, "It cannot contain special (non-alphabetical/numeric) characters", ICON_ERROR);
+    uiItemL(layout,
+            TIP_("It cannot contain special (non-alphabetical/numeric) characters"),
+            ICON_ERROR);
   }
   if (dvar->flag & DVAR_FLAG_INVALID_PY_KEYWORD) {
-    uiItemL(layout, "It cannot be a reserved keyword in Python", ICON_INFO);
+    uiItemL(layout, TIP_("It cannot be a reserved keyword in Python"), ICON_INFO);
   }
 
   UI_popup_menu_end(C, pup);

source/blender/editors/space_image/image_buttons.c

@@ -1056,7 +1056,7 @@ void uiTemplateImageSettings(uiLayout *layout, PointerRNA *imfptr, bool color_ma
 
   if (imf->imtype == R_IMF_IMTYPE_CINEON) {
 #if 1
-    uiItemL(col, IFACE_("Hard coded Non-Linear, Gamma:1.7"), ICON_NONE);
+    uiItemL(col, TIP_("Hard coded Non-Linear, Gamma:1.7"), ICON_NONE);
 #else
     uiItemR(col, imfptr, "use_cineon_log", 0, NULL, ICON_NONE);
     uiItemR(col, imfptr, "cineon_black", 0, NULL, ICON_NONE);

source/blender/editors/space_node/drawnode.cc

@@ -993,7 +993,7 @@ static void node_shader_buts_vertex_color(uiLayout *layout, bContext *C, Pointer
     }
   }
   else {
-    uiItemL(layout, "No mesh in active object.", ICON_ERROR);
+    uiItemL(layout, TIP_("No mesh in active object"), ICON_ERROR);
   }
 }
 

source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c

@@ -388,7 +388,7 @@ static void options_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiLayoutSetEnabled(layout, !is_baked);
 
   if (use_cache && !is_first) {
-    uiItemL(layout, "Cached from the first line art modifier.", ICON_INFO);
+    uiItemL(layout, TIP_("Cached from the first line art modifier"), ICON_INFO);
     return;
   }
 
@@ -439,7 +439,7 @@ static void occlusion_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiLayoutSetEnabled(layout, !is_baked);
 
   if (!show_in_front) {
-    uiItemL(layout, IFACE_("Object is not in front"), ICON_INFO);
+    uiItemL(layout, TIP_("Object is not in front"), ICON_INFO);
   }
 
   layout = uiLayoutColumn(layout, false);
@@ -568,7 +568,7 @@ static void face_mark_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiLayoutSetEnabled(layout, !is_baked);
 
   if (use_cache && !is_first) {
-    uiItemL(layout, "Cached from the first line art modifier.", ICON_INFO);
+    uiItemL(layout, TIP_("Cached from the first line art modifier"), ICON_INFO);
     return;
   }
 
@@ -596,7 +596,7 @@ static void chaining_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiLayoutSetEnabled(layout, !is_baked);
 
   if (use_cache && !is_first) {
-    uiItemL(layout, "Cached from the first line art modifier.", ICON_INFO);
+    uiItemL(layout, TIP_("Cached from the first line art modifier"), ICON_INFO);
     return;
   }
 
@@ -633,7 +633,7 @@ static void vgroup_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiLayoutSetEnabled(layout, !is_baked);
 
   if (use_cache && !is_first) {
-    uiItemL(layout, "Cached from the first line art modifier.", ICON_INFO);
+    uiItemL(layout, TIP_("Cached from the first line art modifier"), ICON_INFO);
     return;
   }
 
@@ -666,7 +666,7 @@ static void bake_panel_draw(const bContext *UNUSED(C), Panel *panel)
   if (is_baked) {
     uiLayout *col = uiLayoutColumn(layout, false);
     uiLayoutSetPropSep(col, false);
-    uiItemL(col, IFACE_("Modifier has baked data"), ICON_NONE);
+    uiItemL(col, TIP_("Modifier has baked data"), ICON_NONE);
     uiItemR(
         col, ptr, "is_baked", UI_ITEM_R_TOGGLE, IFACE_("Continue Without Clearing"), ICON_NONE);
   }
@@ -696,7 +696,7 @@ static void composition_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiItemR(layout, ptr, "use_image_boundary_trimming", 0, NULL, ICON_NONE);
 
   if (show_in_front) {
-    uiItemL(layout, IFACE_("Object is shown in front"), ICON_ERROR);
+    uiItemL(layout, TIP_("Object is shown in front"), ICON_ERROR);
   }
 
   uiLayout *col = uiLayoutColumn(layout, false);

source/blender/modifiers/intern/MOD_cloth.c

@@ -285,7 +285,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_collision.c

@@ -263,7 +263,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_decimate.c

@@ -236,8 +236,8 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, &ob_ptr);
 
   int decimate_type = RNA_enum_get(ptr, "decimate_type");
-  char count_info[32];
+  char count_info[64];
-  snprintf(count_info, 32, "%s: %d", IFACE_("Face Count"), RNA_int_get(ptr, "face_count"));
+  snprintf(count_info, 32, TIP_("Face Count: %d"), RNA_int_get(ptr, "face_count"));
 
   uiItemR(layout, ptr, "decimate_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
 

source/blender/modifiers/intern/MOD_dynamicpaint.c

@@ -193,7 +193,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_fluid.c

@@ -247,7 +247,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_ocean.c

@@ -552,7 +552,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
   modifier_panel_end(layout, ptr);
 
 #else  /* WITH_OCEANSIM */
-  uiItemL(layout, IFACE_("Built without Ocean modifier"), ICON_NONE);
+  uiItemL(layout, TIP_("Built without Ocean modifier"), ICON_NONE);
 #endif /* WITH_OCEANSIM */
 }
 

source/blender/modifiers/intern/MOD_particlesystem.c

@@ -277,7 +277,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
   ModifierData *md = (ModifierData *)ptr->data;
   ParticleSystem *psys = ((ParticleSystemModifierData *)md)->psys;
 
-  uiItemL(layout, IFACE_("Settings are in the particle tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are in the particle tab"), ICON_NONE);
 
   if (!(ob->mode & OB_MODE_PARTICLE_EDIT)) {
     if (ELEM(psys->part->ren_as, PART_DRAW_GR, PART_DRAW_OB)) {

source/blender/modifiers/intern/MOD_remesh.c

@@ -273,7 +273,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
   modifier_panel_end(layout, ptr);
 
 #else  /* WITH_MOD_REMESH */
-  uiItemL(layout, IFACE_("Built without Remesh modifier"), ICON_NONE);
+  uiItemL(layout, TIP_("Built without Remesh modifier"), ICON_NONE);
 #endif /* WITH_MOD_REMESH */
 }
 

source/blender/modifiers/intern/MOD_softbody.c

@@ -92,7 +92,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_subsurf.c

@@ -27,6 +27,7 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "BLI_string.h"
 #include "BLI_utildefines.h"
 
 #include "BLT_translation.h"
@@ -414,8 +415,12 @@ static void panel_draw(const bContext *C, Panel *panel)
     float preview = MAX2(RNA_float_get(&cycles_ptr, "preview_dicing_rate") *
                              RNA_float_get(&ob_cycles_ptr, "dicing_rate"),
                          0.1f);
-    char output[64];
+    char output[256];
-    snprintf(output, 64, "Final Scale: Render %.2f px, Viewport %.2f px", render, preview);
+    BLI_snprintf(output,
+                 sizeof(output),
+                 TIP_("Final Scale: Render %.2f px, Viewport %.2f px"),
+                 render,
+                 preview);
     uiItemL(layout, output, ICON_NONE);
 
     uiItemS(layout);

source/blender/modifiers/intern/MOD_surface.c

@@ -207,7 +207,7 @@ static void panel_draw(const bContext *UNUSED(C), Panel *panel)
 
   PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
-  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
+  uiItemL(layout, TIP_("Settings are inside the Physics tab"), ICON_NONE);
 
   modifier_panel_end(layout, ptr);
 }

source/blender/modifiers/intern/MOD_ui_common.c

@@ -108,7 +108,7 @@ void modifier_panel_end(uiLayout *layout, PointerRNA *ptr)
   ModifierData *md = ptr->data;
   if (md->error) {
     uiLayout *row = uiLayoutRow(layout, false);
-    uiItemL(row, IFACE_(md->error), ICON_ERROR);
+    uiItemL(row, TIP_(md->error), ICON_ERROR);
   }
 }
 

source/blender/shader_fx/intern/FX_ui_common.c

@@ -101,7 +101,7 @@ void shaderfx_panel_end(uiLayout *layout, PointerRNA *ptr)
   ShaderFxData *fx = ptr->data;
   if (fx->error) {
     uiLayout *row = uiLayoutRow(layout, false);
-    uiItemL(row, IFACE_(fx->error), ICON_ERROR);
+    uiItemL(row, TIP_(fx->error), ICON_ERROR);
   }
 }
 

source/blender/windowmanager/intern/wm_splash_screen.c

@@ -323,7 +323,7 @@ static uiBlock *wm_block_create_about(bContext *C, ARegion *region, void *UNUSED
 
   uiLayout *col = uiLayoutColumn(layout, true);
 
-  uiItemL_ex(col, N_("Blender"), ICON_NONE, true, false);
+  uiItemL_ex(col, IFACE_("Blender"), ICON_NONE, true, false);
 
   MenuType *mt = WM_menutype_find("WM_MT_splash_about", true);
   if (mt) {