Merge PR #1216: expose MTP in snap menus

assets/icons/osnap/mtp.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#B4B6B9" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M12 8.26 16.05 15.74H7.95Z"/><circle cx="4.5" cy="19.5" r="1.5" fill="#B4B6B9" stroke="none"/><circle cx="19.5" cy="4.5" r="1.5" fill="#B4B6B9" stroke="none"/></svg>

locales/ar-SA/opencadstudio.ftl

@@ -632,7 +632,9 @@ common =
     .middle-right-sentence-case = وسط اليمين
     .middleleft = وسط اليسار
     .middleright = وسط اليمين
+    .mid-between-2-points-m2p = نقطة المنتصف بين نقطتين (M2P)
     .midpoint = نقطة المنتصف
+    .mtp-needs-an-active-point-prompt = يتطلب MTP مطالبة نقطة نشطة.
     .miles = أميال
     .millimeters = مليمترات
     .model-title-case = النموذج

locales/bg-BG/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Средата вдясно
     .middleleft = Средата вляво
     .middleright = Средата вдясно
+    .mid-between-2-points-m2p = Среда между 2 точки (M2P)
     .midpoint = Средна точка
+    .mtp-needs-an-active-point-prompt = MTP изисква активна подкана за точка.
     .miles = Мили
     .millimeters = Милиметри
     .model-title-case = Модел

locales/cs-CZ/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Uprostřed vpravo
     .middleleft = Uprostřed vlevo
     .middleright =Uprostřed vpravo
+    .mid-between-2-points-m2p = Střed mezi 2 body (M2P)
     .midpoint = Střed
+    .mtp-needs-an-active-point-prompt = MTP vyžaduje aktivní výzvu k zadání bodu.
     .miles = Míle
     .millimeters = milimetry
     .model-title-case = Model

locales/de-DE/opencadstudio.ftl

@@ -620,7 +620,9 @@ common =
     .middle-right-sentence-case = Mitte rechts
     .middleleft = Mitte links
     .middleright = Mitte rechts
+    .mid-between-2-points-m2p = Mitte zwischen 2 Punkten (M2P)
     .midpoint = Mittelpunkt
+    .mtp-needs-an-active-point-prompt = MTP erfordert eine aktive Punkteingabe.
     .miles = Meilen
     .millimeters = Millimeter
     .model-title-case = Modell

locales/el-GR/opencadstudio.ftl

@@ -621,7 +621,9 @@ common =
     .middle-right-sentence-case = Μέση δεξιά
     .middleleft = Μέση αριστερά
     .middleright = Μέση δεξιά
+    .mid-between-2-points-m2p = Μέσο μεταξύ 2 σημείων (M2P)
     .midpoint = Μέσο
+    .mtp-needs-an-active-point-prompt = Το MTP απαιτεί ενεργή προτροπή σημείου.
     .miles = Μίλια
     .millimeters = Χιλιοστά
     .model-title-case = Μοντέλο

locales/en-US/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Middle right
     .middleleft = Middle left
     .middleright = Middle right
+    .mid-between-2-points-m2p = Mid Between 2 Points (M2P)
     .midpoint = Midpoint
+    .mtp-needs-an-active-point-prompt = MTP needs an active point prompt.
     .miles = Miles
     .millimeters = Millimeters
     .model-title-case = Model

locales/es-ES/opencadstudio.ftl

@@ -620,7 +620,9 @@ common =
     .middle-right-sentence-case = Medio derecha
     .middleleft = Medio izquierda
     .middleright = Medio derecha
+    .mid-between-2-points-m2p = Punto medio entre 2 puntos (M2P)
     .midpoint = Punto medio
+    .mtp-needs-an-active-point-prompt = MTP requiere una solicitud de punto activa.
     .miles = Millas
     .millimeters = Milímetros
     .model-title-case = Modelo

locales/fi-FI/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Keski oikealla
     .middleleft = Keski vasen
     .middleright =Keski oikealla
+    .mid-between-2-points-m2p = Kahden pisteen puoliväli (M2P)
     .midpoint = Keskipiste
+    .mtp-needs-an-active-point-prompt = MTP vaatii aktiivisen pistekehotteen.
     .miles = Mailia
     .millimeters = millimetriä
     .model-title-case = Malli

locales/fr-FR/opencadstudio.ftl

@@ -620,7 +620,9 @@ common =
     .middle-right-sentence-case = Moyen droit
     .middleleft = Moyen gauche
     .middleright = Moyen droit
+    .mid-between-2-points-m2p = Milieu entre 2 points (M2P)
     .midpoint = Moyenne
+    .mtp-needs-an-active-point-prompt = MTP nécessite une invite de point active.
     .miles = Milles
     .millimeters = Millimètres
     .model-title-case = Modèle

locales/hi-IN/opencadstudio.ftl

@@ -608,7 +608,9 @@ common =
     .middle-right-sentence-case = मध्य दाएं
     .middleleft = मध्य बाएं
     .middleright = मध्य दाएँ
+    .mid-between-2-points-m2p = 2 बिंदुओं के बीच का मध्यबिंदु (M2P)
     .midpoint = मिडपॉइंट
+    .mtp-needs-an-active-point-prompt = MTP के लिए सक्रिय बिंदु प्रॉम्प्ट आवश्यक है।
     .miles = माइल्स
     .millimeters = मिलीमीटर
     .model-title-case = मॉडल

locales/hu-HU/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Jobb középső
     .middleleft = bal középső
     .middleright =Jobb középső
+    .mid-between-2-points-m2p = Két pont közötti felezőpont (M2P)
     .midpoint = Középpont
+    .mtp-needs-an-active-point-prompt = Az MTP aktív pontbekérést igényel.
     .miles = Mérföld
     .millimeters = Milliméter
     .model-title-case = Modell

locales/it-IT/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Centro a destra
     .middleleft = Centro a sinistra
     .middleright =Centro a destra
+    .mid-between-2-points-m2p = Punto medio tra 2 punti (M2P)
     .midpoint = Punto medio
+    .mtp-needs-an-active-point-prompt = MTP richiede una richiesta di punto attiva.
     .miles = Miglia
     .millimeters = Millimetri
     .model-title-case = Modello

locales/ja-JP/opencadstudio.ftl

@@ -610,7 +610,9 @@ common =
     .middle-right-sentence-case = 中央右
     .middleleft = 中央左
     .middleright = 中央右
+    .mid-between-2-points-m2p = 2点間の中点 (M2P)
     .midpoint = 中点
+    .mtp-needs-an-active-point-prompt = MTP にはアクティブな点入力プロンプトが必要です。
     .miles = マイル
     .millimeters = ミリメートル
     .model-title-case = モデル

locales/ko-KR/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = 가운데 오른쪽
     .middleleft = 가운데 왼쪽
     .middleright = 가운데 오른쪽
+    .mid-between-2-points-m2p = 두 점 사이의 중점 (M2P)
     .midpoint = 중간점
+    .mtp-needs-an-active-point-prompt = MTP에는 활성 점 입력 프롬프트가 필요합니다.
     .miles =마일리지
     .millimeters = 밀리미터
     .model-title-case = 모델

locales/nl-NL/opencadstudio.ftl

@@ -618,7 +618,9 @@ common =
     .middle-right-sentence-case = Middenrechts
     .middleleft = Midden links
     .middleright = Middenrechts
+    .mid-between-2-points-m2p = Midden tussen 2 punten (M2P)
     .midpoint = Middenpunt
+    .mtp-needs-an-active-point-prompt = MTP vereist een actieve puntinvoer.
     .miles = Mijlen
     .millimeters = Millimeter
     .model-title-case = Model

locales/pl-PL/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = Środkowy prawy
     .middleleft = Środkowy lewy
     .middleright =Środkowy prawy
+    .mid-between-2-points-m2p = Środek między 2 punktami (M2P)
     .midpoint = Punkt środkowy
+    .mtp-needs-an-active-point-prompt = MTP wymaga aktywnego monitu o punkt.
     .miles = Mile
     .millimeters = Milimetry
     .model-title-case = Modelka

locales/pt-BR/opencadstudio.ftl

@@ -620,7 +620,9 @@ common =
     .middle-right-sentence-case = Meio direito
     .middleleft = Meio esquerdo
     .middleright = Meio direito
+    .mid-between-2-points-m2p = Ponto médio entre 2 pontos (M2P)
     .midpoint = Ponto médio
+    .mtp-needs-an-active-point-prompt = O MTP requer uma solicitação de ponto ativa.
     .miles = Milhas
     .millimeters = Milímetros
     .model-title-case = Modelo

locales/ru-RU/opencadstudio.ftl

@@ -623,7 +623,9 @@ common =
     .middle-right-sentence-case = Средний правый
     .middleleft = Средний слева
     .middleright = Средний правый
+    .mid-between-2-points-m2p = Середина между 2 точками (M2P)
     .midpoint = Средняя точка
+    .mtp-needs-an-active-point-prompt = Для MTP требуется активный запрос точки.
     .miles = Майлз
     .millimeters = Миллиметры
     .model-title-case = Модель

locales/tr-TR/opencadstudio.ftl

@@ -606,7 +606,9 @@ common =
     .middle-right-sentence-case = Orta sağ
     .middleleft = Orta sol
     .middleright = Orta sağ
+    .mid-between-2-points-m2p = 2 Nokta Arasındaki Orta Nokta (M2P)
     .midpoint = Orta Nokta
+    .mtp-needs-an-active-point-prompt = MTP için etkin bir nokta istemi gerekir.
     .miles = Mil
     .millimeters = Milimetre
     .model-title-case = Model

locales/zh-CN/opencadstudio.ftl

@@ -607,7 +607,9 @@ common =
     .middle-right-sentence-case = 右边
     .middleleft = 左边
     .middleright = 右中边
+    .mid-between-2-points-m2p = 两点之间的中点 (M2P)
     .midpoint = 中点
+    .mtp-needs-an-active-point-prompt = MTP 需要活动的点提示。
     .miles = 迈尔斯
     .millimeters = 毫米数
     .model-title-case = 模型

locales/zh-TW/opencadstudio.ftl

@@ -619,7 +619,9 @@ common =
     .middle-right-sentence-case = 右邊
     .middleleft = 左邊
     .middleright = 右中邊
+    .mid-between-2-points-m2p = 兩點之間的中點 (M2P)
     .midpoint = 中點
+    .mtp-needs-an-active-point-prompt = MTP 需要作用中的點提示。
     .miles = 邁爾斯
     .millimeters = 毫米數
     .model-title-case = 模型

src/app/automation.rs

@@ -1551,6 +1551,23 @@ mod tests {
         assert!(app.tabs[0].active_cmd.is_none());
     }
 
+    #[test]
+    fn mtp_snap_override_starts_the_existing_modifier() {
+        use crate::app::Message;
+        let mut app = OpenCADStudio::new_for_test();
+        app.automation_op(r#"{"op":"new"}"#);
+
+        let _ = app.update(Message::CommandInput("LINE".to_string()));
+        let _ = app.update(Message::CommandSubmit);
+        let _ = app.update(Message::SnapOverrideMtp);
+
+        assert_eq!(app.tabs[0].active_cmd.as_ref().map(|c| c.name()), Some("MTP"));
+        assert_eq!(
+            app.tabs[0].suspended_cmd.as_ref().map(|c| c.name()),
+            Some("LINE")
+        );
+    }
+
     #[test]
     fn test_mtp_escape_restores_parent() {
         use crate::app::Message;

src/app/mod.rs

@@ -1910,9 +1910,12 @@ pub enum Message {
     WebFieldCopy,
     /// Web only: the focused field's text — write it to the clipboard.
     WebFieldCopyText(Option<String>),
-    /// Pick from the one-shot snap override menu (Shift+RMB): only this snap
-    /// applies to the next point pick, then the configuration restores (#337).
+    /// Pick from the one-shot snap override menu (Shift+RMB): only this
+    /// snap applies to the next point pick, then the configuration restores (#337).
     SnapOverridePick(crate::snap::SnapType),
+    /// Mid Between 2 Points from the snap menu: modal 2-pick modifier over
+    /// the active point prompt.
+    SnapOverrideMtp,
     /// Close the one-shot snap override menu without picking.
     SnapOverrideClose,
     /// Open a path from the Start tab's recent-documents list (skips the

src/app/update/mod.rs

@@ -680,6 +680,29 @@ impl OpenCADStudio {
                 Task::none()
             }
 
+            Message::SnapOverrideMtp => {
+                self.snap_override_popup = None;
+                self.tabs[self.active_tab]
+                    .scene
+                    .selection
+                    .borrow_mut()
+                    .context_menu = None;
+                // Same guard as typed MTP/M2P: point step, not entity pick.
+                let i = self.active_tab;
+                let allowed = self.tabs[i].active_cmd.as_ref().is_some_and(|c| {
+                    (!c.input_kind().wants_text() || c.point_step_accepts_keywords())
+                        && !c.needs_entity_pick()
+                });
+                if allowed {
+                    self.start_mtp_modifier(i);
+                } else {
+                    self.command_line.push_info(
+                        crate::t!("MTP needs an active point prompt.").as_ref(),
+                    );
+                }
+                Task::none()
+            }
+
             Message::SnapOverrideClose => {
                 self.snap_override_popup = None;
                 Task::none()

src/app/view/mod.rs

@@ -1753,6 +1753,11 @@ bg={bg_ms:.1}ms n={view_count}"
             };
             if let Some(p) = ctx_pos {
                 let has_cmd = tab.active_cmd.is_some();
+                // Same guard as typed MTP/M2P and SnapOverrideMtp.
+                let has_point_step = tab.active_cmd.as_ref().is_some_and(|c| {
+                    (!c.input_kind().wants_text() || c.point_step_accepts_keywords())
+                        && !c.needs_entity_pick()
+                });
                 let has_selection = !tab.scene.selected.is_empty();
                 let isolation_active = tab.scene.is_isolation_active();
                 let last_cmds: Vec<String> = self
@@ -1771,6 +1776,7 @@ bg={bg_ms:.1}ms n={view_count}"
                     isolation_active,
                     last_cmds,
                     draworder_open,
+                    has_point_step,
                 ));
             }
         }

src/app/view/overlay.rs

@@ -1117,6 +1117,7 @@ pub(super) fn viewport_context_menu_overlay(
     isolation_active: bool,
     last_cmds: Vec<String>,
     draworder_open: bool,
+    has_point_step: bool,
 ) -> Element<'static, Message> {
     let item = |label: String, msg: Message| -> Element<'static, Message> {
         button(text(label).size(12))
@@ -1161,6 +1162,15 @@ pub(super) fn viewport_context_menu_overlay(
     if has_cmd {
         items.push(item(t!("Cancel").into_owned(), Message::CommandEscape));
         items.push(item(t!("Enter").into_owned(), Message::CommandFinalize));
+        // MTP (`_M2P`) goes last, after Parallel: two picks, so not a
+        // `SnapType`, but same icon-only cell with hover tooltip.
+        if has_point_step {
+            items.push(sep());
+            items.push(item(
+                t!("Mid Between 2 Points (M2P)").into_owned(),
+                Message::SnapOverrideMtp,
+            ));
+        }
     } else {
         if !last_cmds.is_empty() {
             let last = last_cmds[0].clone();
@@ -1277,21 +1287,19 @@ pub(super) fn viewport_context_menu_overlay(
 
 /// One-shot snap override menu (Shift+RMB, #337): a cursor-anchored grid of
 /// snap ICONS only — the names show as hover tooltips. Picking one applies
-/// that snap to just the next point pick.
+/// that snap to just the next point pick; the trailing MTP cell instead
+/// suspends the prompt for two picks and returns their midpoint.
 pub(super) fn snap_override_overlay(pos: iced::Point) -> Element<'static, Message> {
     const COLS: usize = 4;
 
-    let cell = |snap_type: crate::snap::SnapType, label: &'static str| -> Element<'static, Message> {
-        let icon = container(crate::ui::icons::themed::<Message>(
-            crate::ui::icons::osnap(snap_type),
-            16.0,
-        ))
+    let cell_icon = |icon: &'static [u8], label: String, msg: Message| -> Element<'static, Message> {
+        let icon = container(crate::ui::icons::themed::<Message>(icon, 16.0))
         .width(26)
         .height(26)
         .align_x(iced::Center)
         .align_y(iced::Center);
         let btn = button(icon)
-            .on_press(Message::SnapOverridePick(snap_type))
+            .on_press(msg)
             .style(|theme: &Theme, status| button::Style {
                 background: matches!(
                     status,
@@ -1327,11 +1335,29 @@ pub(super) fn snap_override_overlay(pos: iced::Point) -> Element<'static, Messag
         .into()
     };
 
+    // MTP (`_M2P`) goes last, after Parallel: two picks, so not a
+    // `SnapType`, but same icon-only cell with hover tooltip.
+    let mut cells: Vec<Element<'static, Message>> = Vec::with_capacity(
+        crate::snap::ALL_SNAP_MODES.len() + 1,
+    );
+    for &(snap_type, _glyph, label) in crate::snap::ALL_SNAP_MODES {
+        cells.push(cell_icon(
+            crate::ui::icons::osnap(snap_type),
+            label.to_string(),
+            Message::SnapOverridePick(snap_type),
+        ));
+    }
+    cells.push(cell_icon(
+        crate::ui::icons::mtp_icon(),
+        t!("Mid Between 2 Points (M2P)").into_owned(),
+        Message::SnapOverrideMtp,
+    ));
     let mut grid = column![].spacing(2);
-    for chunk in crate::snap::ALL_SNAP_MODES.chunks(COLS) {
+    while !cells.is_empty() {
+        let n = cells.len().min(COLS);
         let mut r = row![].spacing(2);
-        for &(snap_type, _glyph, label) in chunk {
-            r = r.push(cell(snap_type, label));
+        for c in cells.drain(..n) {
+            r = r.push(c);
         }
         grid = grid.push(r);
     }

src/locale_catalog.rs

@@ -1677,6 +1677,7 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "MiddleOfText" => Some(("styles", "middleoftext")),
         "MiddleOfTopLine" => Some(("styles", "middleoftopline")),
         "MiddleRight" => Some(("common", "middleright")),
+        "Mid Between 2 Points (M2P)" => Some(("common", "mid-between-2-points-m2p")),
         "Midpoint" => Some(("common", "midpoint")),
         "Miles" => Some(("common", "miles")),
         "Millimeters" => Some(("common", "millimeters")),
@@ -1707,6 +1708,7 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "Move Right" => Some(("layout", "move-right")),
         "Move freely" => Some(("modify", "move-freely")),
         "Move text & arrows out" => Some(("modify", "move-text-arrows-out")),
+        "MTP needs an active point prompt." => Some(("common", "mtp-needs-an-active-point-prompt")),
         "Multi-View\nBlock" => Some(("insert", "multi-view-block")),
         "MultiLeader" => Some(("properties", "multileader")),
         "MultiLine" => Some(("properties", "multiline")),

src/ui/icons.rs

@@ -43,6 +43,7 @@ static OSNAP_NEAREST: &[u8] = include_bytes!("../../assets/icons/osnap/nearest.s
 static OSNAP_APPARENT: &[u8] = include_bytes!("../../assets/icons/osnap/apparent.svg");
 static OSNAP_PARALLEL: &[u8] = include_bytes!("../../assets/icons/osnap/parallel.svg");
 static OSNAP_GRID: &[u8] = include_bytes!("../../assets/icons/osnap/grid.svg");
+static OSNAP_MTP: &[u8] = include_bytes!("../../assets/icons/osnap/mtp.svg");
 
 static LAY_ON: &[u8] = include_bytes!("../../assets/icons/layers/layon.svg");
 static LAY_OFF: &[u8] = include_bytes!("../../assets/icons/layers/layoff.svg");
@@ -595,6 +596,11 @@ pub fn osnap(snap: crate::snap::SnapType) -> &'static [u8] {
     }
 }
 
+/// MTP menu icon: modal 2-pick modifier, not a persistent `SnapType` mode.
+pub fn mtp_icon() -> &'static [u8] {
+    OSNAP_MTP
+}
+
 /// Layer visibility icon bytes (on / off).
 pub fn layer_visible(visible: bool) -> &'static [u8] {
     if visible {