[nostalgia/gfx] Add navigateTo handler to TileSheetEditor

deps/nostalgia/src/nostalgia/modules/gfx/include/nostalgia/gfx/tilesheet.hpp

@@ -426,6 +426,8 @@ ox::Error resizeSubsheet(TileSheet::SubSheet &ss, ox::Size const&sz) noexcept;
 [[nodiscard]]
 TileSheet::SubSheetIdx validateSubSheetIdx(TileSheet const&ts, TileSheet::SubSheetIdx idx) noexcept;
 
+ox::Result<TileSheet::SubSheetIdx> getSubSheetIdx(TileSheet const &ts, SubSheetId pId) noexcept;
+
 [[nodiscard]]
 TileSheet::SubSheet &getSubSheet(
 		ox::SpanView<uint32_t> const&idx,

deps/nostalgia/src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditor-imgui.cpp

@@ -388,6 +388,17 @@ ox::Error TileSheetEditorImGui::saveItem() noexcept {
 	return m_model.saveFile();
 }
 
+void TileSheetEditorImGui::navigateTo(ox::StringViewCR arg) noexcept {
+	auto const subSheetId = strToInt(arg);
+	if (subSheetId.error) {
+		return;
+	}
+	if (auto const [val, err] = getSubSheetIdx(m_model.img(), subSheetId.value);
+	    !err) {
+		setActiveSubsheet(val);
+	}
+}
+
 void TileSheetEditorImGui::showSubsheetEditor() noexcept {
 	auto const&sheet = m_model.activeSubSheet();
 	if (!sheet.subsheets.empty()) {
@@ -451,7 +462,7 @@ void TileSheetEditorImGui::drawTileSheet(ox::Vec2 const&fbSize) noexcept {
 		if (wheelh != 0) {
 			m_view.scrollH(fbSize, wheelh);
 		}
-		if (ImGui::IsMouseDown(0) && m_prevMouseDownPos != mousePos) {
+		if (ImGui::IsMouseClicked(0) && m_prevMouseDownPos != mousePos) {
 			m_prevMouseDownPos = mousePos;
 			switch (m_tool) {
 				case TileSheetTool::Draw:

deps/nostalgia/src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditor-imgui.hpp

@@ -87,6 +87,8 @@ class TileSheetEditorImGui: public studio::Editor {
 	protected:
 		ox::Error saveItem() noexcept override;
 
+		void navigateTo(ox::StringViewCR arg) noexcept override;
+
 	private:
 		void showSubsheetEditor() noexcept;
 

deps/nostalgia/src/nostalgia/modules/gfx/src/tilesheet.cpp

@@ -2,6 +2,8 @@
  * Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#include "nostalgia/gfx/tilesheet.hpp"
+
 #include <ox/std/size.hpp>
 #include <ox/std/vector.hpp>
 
@@ -187,6 +189,28 @@ TileSheet::SubSheetIdx validateSubSheetIdx(TileSheet const&ts, TileSheet::SubShe
 	return validateSubSheetIdx(std::move(idx), 0, ts.subsheet);
 }
 
+static ox::Error getSubSheetIdx(TileSheet::SubSheet const &ss, SubSheetId const pId, TileSheet::SubSheetIdx &idx) noexcept {
+	if (ss.id == pId) {
+		return {};
+	}
+	for (uint32_t i{}; auto const &sub : ss.subsheets) {
+		idx.emplace_back(i);
+		auto const err = getSubSheetIdx(sub, pId, idx);
+		if (!err) {
+			return {};
+		}
+		idx.pop_back();
+		++i;
+	}
+	return ox::Error{1, "SubSheet not found"};
+}
+
+ox::Result<TileSheet::SubSheetIdx> getSubSheetIdx(TileSheet const &ts, SubSheetId const pId) noexcept {
+	ox::Result<TileSheet::SubSheetIdx> out;
+	OX_RETURN_ERROR(getSubSheetIdx(ts.subsheet, pId, out.value));
+	return out;
+}
+
 #if defined(__GNUC__) && __GNUC__ >= 13
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdangling-reference"