Image Trace: keepColors says when the matching colors produce no paths

A trace whose kept colors were traced and produced no paths gave no
warning, or, with Ignore Color on, said that Ignore Color left those
colors out. The Ignore Color warning now shows only when no kept color
was traced at all, and otherwise the first warning says that the colors
that match keepColors produce no paths. The new message has a row in
each complete-message catalog.

Whether Ignore Color or keepColors leaves a palette entry out is now
decided once per entry, so tracing a layer no longer scans the
keepColors list for each pixel.

Docs: docs/image-trace-adjustments.md.

crates/engine/src/cmd/buildcmds.rs

@@ -1223,8 +1223,9 @@ pub(crate) fn trace_warnings(size: (u32, u32), traced: (u32, u32)) -> Vec<String
 }
 
 /// What a trace with Keep Colors tells the user: that nothing was traced because no color the
-/// trace found matches a listed one, or because Ignore Color left out the ones that match; each
-/// listed color that matches none of them; and that Flat Logo mode does not use the list.
+/// trace found matches a listed one, because Ignore Color left out the ones that match, or because
+/// the ones that match produce no paths; each listed color that matches none of them; and that Flat
+/// Logo mode does not use the list.
 pub(crate) fn keep_warnings(params: &tr::TraceParams, res: &tr::TraceResult) -> Vec<String> {
     if params.keep_colors.is_empty() {
         return vec![];
@@ -1236,8 +1237,11 @@ pub(crate) fn keep_warnings(params: &tr::TraceParams, res: &tr::TraceResult) ->
         return vec![format!("Nothing was traced: none of the colors the trace found matches keepColors ({}).", params.keep_colors.join(", "))];
     }
     let mut out = vec![];
-    if res.paths.is_empty() && params.ignore_white {
+    // The trace's palette holds each color it traced, also one that produced no paths.
+    if res.paths.is_empty() && params.ignore_white && res.palette.is_empty() {
         out.push("Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.".to_string());
+    } else if res.paths.is_empty() {
+        out.push("Nothing was traced: the colors that match keepColors produce no paths.".to_string());
     }
     out.extend(res.keep_unmatched.iter().map(|c| format!("keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.")));
     out
@@ -1312,7 +1316,25 @@ fn trace_expand(s: &mut Session, p: &Value) -> Result<Value> {
 
 #[cfg(test)]
 mod trace_limit_tests {
-    use super::{MAX_TRACE_ANCHORS, trace_warnings};
+    use super::{MAX_TRACE_ANCHORS, keep_warnings, trace_warnings};
+    use vectorcraft_trace as tr;
+
+    #[test]
+    fn keep_warnings_name_matched_colors_that_produce_no_paths() {
+        let params = tr::TraceParams { keep_colors: vec!["#ff0000".into()], ..tr::TraceParams::default() };
+        // A listed color was traced, and produced no paths.
+        let traced = tr::TraceResult { palette: vec![[255, 0, 0]], ..tr::TraceResult::default() };
+        let none = vec!["Nothing was traced: the colors that match keepColors produce no paths.".to_string()];
+        assert_eq!(keep_warnings(&params, &traced), none);
+        // With Ignore Color, too: Ignore Color did not leave that color out.
+        let ignoring = tr::TraceParams { ignore_white: true, ..params.clone() };
+        assert_eq!(keep_warnings(&ignoring, &traced), none);
+        // Ignore Color left out every color that matches: none was traced.
+        assert_eq!(
+            keep_warnings(&ignoring, &tr::TraceResult::default()),
+            vec!["Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.".to_string()]
+        );
+    }
 
     #[test]
     fn trace_warnings_name_a_large_or_scaled_down_image() {

crates/trace/src/lib.rs

@@ -519,6 +519,12 @@ fn is_kept(c: [u8; 3], keep: &[[u8; 3]]) -> bool {
     keep.is_empty() || keep.iter().any(|&k| is_ignored(c, Some(k)))
 }
 
+/// For each color of `palette`, whether it is left out of the trace: Ignore Color's (`ignore`,
+/// `None` for white) and those Keep Colors does not list (`keep`).
+fn left_out(palette: &[[u8; 3]], params: &TraceParams, ignore: Option<[u8; 3]>, keep: &[[u8; 3]]) -> Vec<bool> {
+    palette.iter().map(|&c| (params.ignore_white && is_ignored(c, ignore)) || !is_kept(c, keep)).collect()
+}
+
 /// Trace `img` with `params`. Failures (an image Logo mode refuses, say) give an empty result: use
 /// [`trace_within`] to see why.
 pub fn trace(img: &Raster, params: &TraceParams) -> TraceResult {
@@ -635,8 +641,8 @@ fn trace_paths(img: &Raster, params: &TraceParams, max_anchors: usize) -> Result
     // Layers left out: Ignore Color's, and those Keep Colors does not list. Abutting, the others
     // are traced as they are in the trace of every color; stacked, they do not reach under the
     // colors left out (see `Layers::ignored`).
-    let dropped = |ci: usize| (params.ignore_white && is_ignored(q.palette[ci], ignore)) || !is_kept(q.palette[ci], &listed);
-    let layers: Vec<(usize, usize)> = order.iter().copied().enumerate().filter(|&(_, ci)| !dropped(ci)).collect();
+    let left_out = left_out(&q.palette, params, ignore, &listed);
+    let layers: Vec<(usize, usize)> = order.iter().copied().enumerate().filter(|&(_, ci)| !left_out.get(ci).copied().unwrap_or(false)).collect();
     // The listed colors that match none of the colors found.
     let keep_unmatched = params
         .keep_colors
@@ -650,8 +656,7 @@ fn trace_paths(img: &Raster, params: &TraceParams, max_anchors: usize) -> Result
         rank: &rank,
         params,
         img,
-        ignore,
-        keep: &listed,
+        left_out,
         boxes,
         gradients: &gradients,
         bw_tones: bw_tones(img, &q),
@@ -712,10 +717,8 @@ struct Layers<'a> {
     rank: &'a [usize],
     params: &'a TraceParams,
     img: &'a Raster,
-    /// The colour Ignore Color leaves out, if not white.
-    ignore: Option<[u8; 3]>,
-    /// The colors Keep Colors lists (empty: every color).
-    keep: &'a [[u8; 3]],
+    /// For each palette entry, whether Ignore Color or Keep Colors leaves it out (see [`left_out`]).
+    left_out: Vec<bool>,
     /// The box each palette entry's pixels lie in: `(x0, y0, x1, y1)`, the far sides excluded.
     boxes: Vec<Option<(usize, usize, usize, usize)>>,
     /// Gradients: the gradient each palette entry is, if it is one.
@@ -736,7 +739,7 @@ impl Layers<'_> {
     /// layer (stacked layers reach under the layers above them, and must not reach under a color
     /// that is left out).
     fn ignored(&self, label: u16) -> bool {
-        self.q.palette.get(label as usize).is_some_and(|c| (self.params.ignore_white && is_ignored(*c, self.ignore)) || !is_kept(*c, self.keep))
+        self.left_out.get(label as usize).copied().unwrap_or(false)
     }
     /// The region across a crack, for cutting outlines at their junctions: the outside pixel's
     /// colour. Stacked layers end on many colours at once and share no edge: one neighbour.
@@ -1093,8 +1096,7 @@ pub(crate) fn shift_probe(img: &Raster, params: &TraceParams) -> Vec<[f64; 4]> {
         rank: &rank,
         params,
         img,
-        ignore: None,
-        keep: &[],
+        left_out: left_out(&q.palette, params, None, &[]),
         boxes: vec![None; n],
         gradients: &gradients,
         bw_tones: bw_tones(img, &q),

crates/ui-egui/src/i18n/cs.tsv

@@ -5388,6 +5388,7 @@ mark-style	Japanese	Japonské
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Režim Ploché logo nepoužívá keepColors: vektorizuje barvy uvedené v logoColors nebo barvy, které najde.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Nic nebylo vektorizováno: žádná z barev, které vektorizace našla, neodpovídá keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Nic nebylo vektorizováno: Ignorovat barvu vynechává všechny oblasti barev uvedených v keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Nic nebylo vektorizováno: z barev odpovídajících keepColors nevznikly žádné cesty.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: žádná z barev, které vektorizace našla, neodpovídá {c}, takže z ní není nic vektorizováno.
 	Artboard {n} of {total}	Pracovní plocha {n} z {total}
 	File {n} of {total}	Soubor {n} z {total}

crates/ui-egui/src/i18n/de.tsv

@@ -4967,6 +4967,7 @@ effect	Soft	Weich
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Der Modus „Flaches Logo“ verwendet keepColors nicht: Er zeichnet die in logoColors genannten Farben nach oder die Farben, die er findet.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Nichts wurde nachgezeichnet: Keine der beim Nachzeichnen gefundenen Farben entspricht keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Nichts wurde nachgezeichnet: „Farbe ignorieren“ lässt jeden Bereich der in keepColors aufgeführten Farben aus.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Nichts wurde nachgezeichnet: Die Farben, die keepColors entsprechen, ergeben keine Pfade.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: Keine der beim Nachzeichnen gefundenen Farben entspricht {c}, daher wird davon nichts nachgezeichnet.
 	Artboard {n} of {total}	Zeichenfläche {n} von {total}
 	File {n} of {total}	Datei {n} von {total}

crates/ui-egui/src/i18n/el.tsv

@@ -5340,6 +5340,7 @@ effect	Points	Σημεία
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Η λειτουργία Επίπεδο λογότυπο δεν χρησιμοποιεί το keepColors: ανιχνεύει τα χρώματα που ορίζονται στο logoColors ή τα χρώματα που βρίσκει.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Δεν ανιχνεύτηκε τίποτα: κανένα από τα χρώματα που βρήκε η ανίχνευση δεν αντιστοιχεί στο keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Δεν ανιχνεύτηκε τίποτα: η Παράβλεψη χρώματος παραλείπει κάθε περιοχή των χρωμάτων που ορίζει το keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Δεν ανιχνεύτηκε τίποτα: τα χρώματα που ταιριάζουν με το keepColors δεν δίνουν καμία διαδρομή.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: κανένα από τα χρώματα που βρήκε η ανίχνευση δεν αντιστοιχεί στο {c}, οπότε τίποτα από αυτό δεν ανιχνεύεται.
 	Artboard {n} of {total}	Πίνακας σχεδίασης {n} από {total}
 	File {n} of {total}	Αρχείο {n} από {total}

crates/ui-egui/src/i18n/es.tsv

@@ -5330,6 +5330,7 @@ mark-style	Japanese	Japonesas
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	El modo Logotipo plano no usa keepColors: calca los colores indicados en logoColors o los colores que encuentra.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	No se calcó nada: ninguno de los colores que encontró el calco coincide con keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	No se calcó nada: Ignorar color omite todas las áreas de los colores que indica keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	No se calcó nada: los colores que coinciden con keepColors no producen ningún trazado.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: ninguno de los colores que encontró el calco coincide con {c}, así que no se calca nada de él.
 	Artboard {n} of {total}	Mesa de trabajo {n} de {total}
 	File {n} of {total}	Archivo {n} de {total}

crates/ui-egui/src/i18n/fi.tsv

@@ -5352,6 +5352,7 @@ mark-style	Japanese	Japanilainen
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Tasainen logo -tila ei käytä keepColors-asetusta: se jäljittää logoColors-asetuksessa nimetyt värit tai löytämänsä värit.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Mitään ei jäljitetty: mikään jäljityksen löytämistä väreistä ei vastaa keepColors-asetusta ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Mitään ei jäljitetty: Ohita väri jättää pois kaikki keepColors-asetuksen värien alueet.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Mitään ei jäljitetty: keepColors-asetusta vastaavista väreistä ei synny polkuja.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: mikään jäljityksen löytämistä väreistä ei vastaa väriä {c}, joten siitä ei jäljitetä mitään.
 	Artboard {n} of {total}	Piirtoalusta {n}/{total}
 	File {n} of {total}	Tiedosto {n}/{total}

crates/ui-egui/src/i18n/fr.tsv

@@ -5387,6 +5387,7 @@ theme	Appearance	Apparence
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Le mode Logo en aplats n’utilise pas keepColors : il vectorise les couleurs indiquées dans logoColors ou celles qu’il trouve.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Rien n’a été vectorisé : aucune des couleurs trouvées par la vectorisation ne correspond à keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Rien n’a été vectorisé : Ignorer la couleur omet toutes les zones des couleurs indiquées dans keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Rien n’a été vectorisé : les couleurs correspondant à keepColors ne produisent aucun tracé.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors : aucune des couleurs trouvées par la vectorisation ne correspond à {c}, donc rien n’en est vectorisé.
 	Artboard {n} of {total}	Plan de travail {n} sur {total}
 	File {n} of {total}	Fichier {n} sur {total}

crates/ui-egui/src/i18n/hu.tsv

@@ -5374,6 +5374,7 @@ imageTrace	Outline	Körvonal
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Az Egyszínű logó mód nem használja a keepColors beállítást: a logoColors beállításban megadott színeket vagy az általa talált színeket vektorizálja.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Semmi sem lett vektorizálva: a vektorizálás által talált színek egyike sem felel meg a keepColors beállításnak ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Semmi sem lett vektorizálva: a Szín figyelmen kívül hagyása kihagyja a keepColors beállításban felsorolt színek minden területét.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Semmi sem lett vektorizálva: a keepColors beállításnak megfelelő színekből nem jön létre útvonal.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: a vektorizálás által talált színek egyike sem felel meg ennek: {c}, így belőle semmi sem lesz vektorizálva.
 	Artboard {n} of {total}	Rajztábla: {n} / {total}
 	File {n} of {total}	Fájl: {n} / {total}

crates/ui-egui/src/i18n/it.tsv

@@ -5001,6 +5001,7 @@ lighting	Light	Luce
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	La modalità Logo piatto non usa keepColors: vettorializza i colori indicati in logoColors o i colori che trova.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Non è stato vettorializzato nulla: nessuno dei colori trovati dalla vettorializzazione corrisponde a keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Non è stato vettorializzato nulla: Ignora colore esclude ogni area dei colori elencati in keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Non è stato vettorializzato nulla: i colori che corrispondono a keepColors non producono tracciati.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: nessuno dei colori trovati dalla vettorializzazione corrisponde a {c}, quindi non ne viene vettorializzato nulla.
 	Artboard {n} of {total}	Tavola da disegno {n} di {total}
 	File {n} of {total}	File {n} di {total}

crates/ui-egui/src/i18n/ja.tsv

@@ -5041,6 +5041,7 @@ lighting	Light	ライト
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	フラットロゴモードは keepColors を使いません。logoColors で指定したカラー、または検出したカラーをトレースします。
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	何もトレースされませんでした。トレースで検出したカラーのどれも keepColors ({_1}) に一致しません。
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	何もトレースされませんでした。「カラーを無視」が keepColors に指定したカラーの領域をすべて除外します。
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	何もトレースされませんでした。keepColors に一致するカラーからパスができません。
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: トレースで検出したカラーのどれも {c} に一致しないため、このカラーは何もトレースされません。
 	Artboard {n} of {total}	アートボード {n} / {total}
 	File {n} of {total}	ファイル {n} / {total}

crates/ui-egui/src/i18n/ka.tsv

@@ -5228,6 +5228,7 @@ imageTrace	Outline	კონტური
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	ბრტყელი ლოგოს რეჟიმი keepColors-ს არ იყენებს: ის ვექტორიზებს logoColors-ში მითითებულ ფერებს ან მის მიერ ნაპოვნ ფერებს.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	არაფერი ვექტორიზდა: ვექტორიზაციის მიერ ნაპოვნი არცერთი ფერი არ შეესაბამება keepColors-ს ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	არაფერი ვექტორიზდა: ფერის იგნორირება გამოტოვებს keepColors-ში ჩამოთვლილი ფერების ყველა არეს.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	არაფერი ვექტორიზდა: keepColors-ის შესაბამისი ფერებიდან არცერთი კონტური არ მიიღება.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: ვექტორიზაციის მიერ ნაპოვნი არცერთი ფერი არ შეესაბამება {c}-ს, ამიტომ მისგან არაფერი ვექტორიზდება.
 @msg	`{given}` isn't a library panel (see window.swatchLibrary)	`{given}` ბიბლიოთეკის პანელი არ არის (იხ. window.swatchLibrary)
 @msg	`{key}` must be a #rrggbb color	`{key}` უნდა იყოს #rrggbb ფერი

crates/ui-egui/src/i18n/ko.tsv

@@ -4964,6 +4964,7 @@ lighting	Light	광원
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	단색 로고 모드는 keepColors를 사용하지 않습니다. logoColors에 지정한 색상 또는 찾은 색상을 추적합니다.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	아무것도 추적하지 않았습니다. 추적에서 찾은 색상 중 keepColors({_1})와 일치하는 색상이 없습니다.
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	아무것도 추적하지 않았습니다. 색상 무시가 keepColors에 나열된 색상의 모든 영역을 제외합니다.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	아무것도 추적하지 않았습니다. keepColors와 일치하는 색상에서 패스가 만들어지지 않습니다.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: 추적에서 찾은 색상 중 {c}와 일치하는 색상이 없어 이 색상은 추적하지 않습니다.
 	Artboard {n} of {total}	아트보드 {n} / {total}
 	File {n} of {total}	파일 {n} / {total}

crates/ui-egui/src/i18n/nl.tsv

@@ -5381,6 +5381,7 @@ swatch	Bright Violet	Felviolet
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	De modus Plat logo gebruikt keepColors niet: hij traceert de kleuren die in logoColors staan, of de kleuren die hij vindt.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Er is niets getraceerd: geen van de kleuren die het traceren vond, komt overeen met keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Er is niets getraceerd: Kleur negeren laat elk gebied van de kleuren in keepColors weg.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Er is niets getraceerd: de kleuren die overeenkomen met keepColors leveren geen paden op.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: geen van de kleuren die het traceren vond, komt overeen met {c}, dus daarvan wordt niets getraceerd.
 	Artboard {n} of {total}	Tekengebied {n} van {total}
 	File {n} of {total}	Bestand {n} van {total}

crates/ui-egui/src/i18n/pl.tsv

@@ -5240,6 +5240,7 @@ mark-style	Japanese	Japońskie
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Tryb Płaskie logo nie używa keepColors: obrysowuje kolory podane w logoColors lub kolory, które znajdzie.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Nic nie zostało obrysowane: żaden z kolorów znalezionych podczas obrysowania nie pasuje do keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Nic nie zostało obrysowane: Ignoruj kolor pomija każdy obszar kolorów wymienionych w keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Nic nie zostało obrysowane: kolory pasujące do keepColors nie dają żadnych ścieżek.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: żaden z kolorów znalezionych podczas obrysowania nie pasuje do {c}, więc nic z niego nie jest obrysowywane.
 	Artboard {n} of {total}	Obszar kompozycji {n} z {total}
 	File {n} of {total}	Plik {n} z {total}

crates/ui-egui/src/i18n/pt-br.tsv

@@ -5305,6 +5305,7 @@ mark-style	Japanese	Japonesas
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	O modo Logotipo Plano não usa keepColors: ele traça as cores indicadas em logoColors ou as cores que encontra.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Nada foi traçado: nenhuma das cores que o traçado encontrou corresponde a keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Nada foi traçado: Ignorar Cor deixa de fora todas as áreas das cores listadas em keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Nada foi traçado: as cores que correspondem a keepColors não geram nenhum caminho.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: nenhuma das cores que o traçado encontrou corresponde a {c}, então nada dela é traçado.
 	Artboard {n} of {total}	Mesa de Trabalho {n} de {total}
 	File {n} of {total}	Arquivo {n} de {total}

crates/ui-egui/src/i18n/ru.tsv

@@ -4997,6 +4997,7 @@ lighting	Light	Свет
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Режим «Плоский логотип» не использует keepColors: он трассирует цвета, указанные в logoColors, или найденные им цвета.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Ничего не трассировано: ни один из найденных при трассировке цветов не соответствует keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Ничего не трассировано: «Игнорировать цвет» исключает все области цветов, перечисленных в keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Ничего не трассировано: цвета, соответствующие keepColors, не дают ни одного контура.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: ни один из найденных при трассировке цветов не соответствует {c}, поэтому из него ничего не трассируется.
 	Artboard {n} of {total}	Монтажная область {n} из {total}
 	File {n} of {total}	Файл {n} из {total}

crates/ui-egui/src/i18n/sv.tsv

@@ -5344,6 +5344,7 @@ theme	Appearance	Utseende
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Läget Platt logotyp använder inte keepColors: det vektoriserar färgerna som anges i logoColors eller färgerna det hittar.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Ingenting vektoriserades: ingen av färgerna som vektoriseringen hittade motsvarar keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Ingenting vektoriserades: Ignorera färg utelämnar alla områden med färgerna som keepColors anger.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Ingenting vektoriserades: färgerna som matchar keepColors ger inga banor.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: ingen av färgerna som vektoriseringen hittade motsvarar {c}, så ingenting av den vektoriseras.
 	Artboard {n} of {total}	Rityta {n} av {total}
 	File {n} of {total}	Fil {n} av {total}

crates/ui-egui/src/i18n/tests.rs

@@ -1416,6 +1416,8 @@ fn the_keep_colors_trace_warnings_are_translated() {
         let w = r["warnings"].as_array().and_then(|w| w.first()).and_then(|w| w.as_str()).unwrap_or_else(|| panic!("{params}: {r}"));
         warnings.push((w.to_string(), shown));
     }
+    // Listed colors that were traced and produced no paths (no square image gives that).
+    warnings.push(("Nothing was traced: the colors that match keepColors produce no paths.".to_string(), ""));
     for (warning, shown) in &warnings {
         for code in COMPLETE_MESSAGES {
             let tr = message(Lang::from_code(code).unwrap(), warning);

crates/ui-egui/src/i18n/tr.tsv

@@ -5382,6 +5382,7 @@ theme	Appearance	Görünüm
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Düz Logo modu keepColors kullanmaz: logoColors içinde adı verilen renkleri veya bulduğu renkleri izler.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Hiçbir şey izlenmedi: izlemenin bulduğu renklerin hiçbiri keepColors ({_1}) ile eşleşmiyor.
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Hiçbir şey izlenmedi: Rengi Yoksay, keepColors içinde listelenen renklerin tüm alanlarını dışarıda bırakıyor.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Hiçbir şey izlenmedi: keepColors ile eşleşen renkler hiçbir yol oluşturmuyor.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: izlemenin bulduğu renklerin hiçbiri {c} ile eşleşmiyor, bu yüzden bu renkten hiçbir şey izlenmiyor.
 @plural	{n} more export waiting|{n} more exports waiting	{n} dışa aktarma daha bekliyor|{n} dışa aktarma daha bekliyor
 @msg	Export cancelled	Dışa aktarma iptal edildi

crates/ui-egui/src/i18n/uk.tsv

@@ -4981,6 +4981,7 @@ lighting	Light	Світло
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Режим «Плоский логотип» не використовує keepColors: він трасує кольори, вказані в logoColors, або знайдені ним кольори.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Нічого не трасовано: жоден із кольорів, знайдених під час трасування, не відповідає keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Нічого не трасовано: «Ігнорувати колір» пропускає всі області кольорів, перелічених у keepColors.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Нічого не трасовано: кольори, що відповідають keepColors, не дають жодного контуру.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: жоден із кольорів, знайдених під час трасування, не відповідає {c}, тому з нього нічого не трасується.
 	Artboard {n} of {total}	Монтажна область {n} з {total}
 	File {n} of {total}	Файл {n} з {total}

crates/ui-egui/src/i18n/vi.tsv

@@ -4981,6 +4981,7 @@ theme	Appearance	Giao diện
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	Chế độ Logo phẳng không dùng keepColors: chế độ này dò các màu được nêu trong logoColors hoặc các màu nó tìm thấy.
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	Không có gì được dò: không màu nào mà quá trình dò tìm thấy khớp với keepColors ({_1}).
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	Không có gì được dò: Bỏ qua màu bỏ đi mọi vùng của các màu mà keepColors liệt kê.
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	Không có gì được dò: các màu khớp với keepColors không tạo ra đường dẫn nào.
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors: không màu nào mà quá trình dò tìm thấy khớp với {c}, nên không có gì của màu đó được dò.
 	Artboard {n} of {total}	Bảng vẽ {n} / {total}
 	File {n} of {total}	Tệp {n} / {total}

crates/ui-egui/src/i18n/zh-hans.tsv

@@ -5220,6 +5220,7 @@ lighting	Light	光源
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	“扁平徽标”模式不使用 keepColors：它描摹 logoColors 中指定的颜色，或它找到的颜色。
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	未描摹任何内容：描摹找到的颜色中没有一种与 keepColors ({_1}) 匹配。
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	未描摹任何内容：“忽略颜色”排除了 keepColors 所列颜色的所有区域。
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	未描摹任何内容：与 keepColors 匹配的颜色未生成任何路径。
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors：描摹找到的颜色中没有一种与 {c} 匹配，因此该颜色未被描摹。
 # Links and Attributes: files and URLs handed to other apps.
 @msg	Edit Original opens image and document files only; “{name}” is not one	编辑原稿只能打开图像和文档文件；“{name}” 不是其中之一

crates/ui-egui/src/i18n/zh-hant.tsv

@@ -2367,6 +2367,7 @@ file-filter	Templates	範本
 @msg	Flat Logo mode does not use keepColors: it traces the colors named in logoColors, or the colors it finds.	「扁平標誌」模式不使用 keepColors：它會描圖 logoColors 中指定的顏色，或它找到的顏色。
 @msg	Nothing was traced: none of the colors the trace found matches keepColors ({_1}).	未描圖任何內容：描圖找到的顏色中沒有一種與 keepColors ({_1}) 相符。
 @msg	Nothing was traced: Ignore Color leaves out every area of the colors keepColors lists.	未描圖任何內容：「忽略顏色」排除了 keepColors 所列顏色的所有區域。
+@msg	Nothing was traced: the colors that match keepColors produce no paths.	未描圖任何內容：與 keepColors 相符的顏色未產生任何路徑。
 @msg	keepColors: none of the colors the trace found matches {c}, so nothing of it is traced.	keepColors：描圖找到的顏色中沒有一種與 {c} 相符，因此該顏色未被描圖。
 # Links and Attributes: files and URLs handed to other apps.
 @msg	Edit Original opens image and document files only; “{name}” is not one	「編輯原稿」只能開啟影像與文件檔案；「{name}」不屬於這兩類

docs/image-trace-adjustments.md

@@ -41,8 +41,9 @@ Ignore Color. An empty list traces every color, and a value that is not a six-di
 refused. With Ignore Color as well, a kept color that Ignore Color matches is still left out. Flat
 Logo does not use `keepColors`: it traces the colors named in `logoColors`, or the colors it finds.
 The reply's `warnings` name each listed color that matches none of the colors the trace found. When
-nothing is traced because no listed color matches, or because Ignore Color leaves out every area of
-the ones that match, the first warning says so, and the status bar shows it. In Flat Logo mode the
+nothing is traced because no listed color matches, because Ignore Color leaves out every area of the
+ones that match, or because the ones that match produce no paths, the first warning says so, and the
+status bar shows it. In Flat Logo mode the
 warning says that `keepColors` is not used.
 
 **Large images.** An image of more than 1500 pixels on a side is traced as any other, only more