[nostalgia/core/studio] Add copy/cut/paste support to TileSheet Editor

src/nostalgia/core/studio/tilesheeteditormodel.cpp

@@ -2,14 +2,26 @@
  * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#include <ox/claw/read.hpp>
 #include <ox/claw/write.hpp>
 
+#include <nostalgia/core/clipboard.hpp>
 #include <nostalgia/core/media.hpp>
+#include <ox/std/buffer.hpp>
 
 #include "tilesheeteditormodel.hpp"
 
 namespace nostalgia::core {
 
+void TileSheetClipboard::addPixel(const geo::Point &pt, uint16_t colorIdx) noexcept {
+	m_pixels.emplace_back(colorIdx, pt);
+}
+
+void TileSheetClipboard::clear() noexcept {
+	m_pixels.clear();
+}
+
+
 TileSheetEditorModel::TileSheetEditorModel(Context *ctx, const ox::String &path) {
 	m_ctx = ctx;
 	m_path = path;
@@ -20,26 +32,59 @@ TileSheetEditorModel::TileSheetEditorModel(Context *ctx, const ox::String &path)
 }
 
 void TileSheetEditorModel::cut() {
+	TileSheetClipboard cb;
+	for (int y = m_selectionBounds.y; y <= m_selectionBounds.y2(); ++y) {
+		for (int x = m_selectionBounds.x; x <= m_selectionBounds.x2(); ++x) {
+			auto pt = geo::Point(x, y);
+			const auto s = activeSubSheet();
+			const auto idx = s->idx(pt);
+			const auto c = s->getPixel(m_img.bpp, idx);
+			s->setPixel(m_img.bpp, idx, 0);
+			pt.x -= m_selectionBounds.x;
+			pt.y -= m_selectionBounds.y;
+			cb.addPixel(pt, c);
+		}
+	}
+	setClipboardObject(m_ctx, &cb);
 }
 
 void TileSheetEditorModel::copy() {
+	TileSheetClipboard cb;
+	for (int y = m_selectionBounds.y; y <= m_selectionBounds.y2(); ++y) {
+		for (int x = m_selectionBounds.x; x <= m_selectionBounds.x2(); ++x) {
+			auto pt = geo::Point(x, y);
+			const auto s = activeSubSheet();
+			const auto idx = s->idx(pt);
+			const auto c = s->getPixel(m_img.bpp, idx);
+			pt.x -= m_selectionBounds.x;
+			pt.y -= m_selectionBounds.y;
+			cb.addPixel(pt, c);
+		}
+	}
+	setClipboardObject(m_ctx, &cb);
 }
 
 void TileSheetEditorModel::paste() {
+	auto [cb, err] = getClipboardObject<TileSheetClipboard>(m_ctx);
+	if (err) {
+		oxLogError(err);
+		oxErrf("Could not read clipboard: {}", toStr(err));
+		return;
+	}
+	const auto pt = m_selectionOrigin == geo::Point(-1, -1) ? geo::Point(0, 0) : m_selectionOrigin;
+	pushCommand(new PasteCommand(&m_img, m_activeSubsSheetIdx, pt, cb));
 }
 
 void TileSheetEditorModel::drawCommand(const geo::Point &pt, std::size_t palIdx) noexcept {
-	auto &activeSubSheet = m_img.getSubSheet(m_activeSubsSheetIdx);
+	const auto &activeSubSheet = m_img.getSubSheet(m_activeSubsSheetIdx);
 	const auto idx = ptToIdx(pt, activeSubSheet.columns);
 	if (idx >= activeSubSheet.pixelCnt(m_img.bpp)) {
 		return;
 	}
 	if (m_ongoingDrawCommand) {
 		m_updated = m_updated || m_ongoingDrawCommand->append(idx);
-	} else {
-		if (activeSubSheet.getPixel(m_img.bpp, idx) != palIdx) {
-			pushCommand(new DrawCommand(&m_img, m_activeSubsSheetIdx, idx, palIdx));
-		}
+	} else if (activeSubSheet.getPixel(m_img.bpp, idx) != palIdx) {
+		pushCommand(new DrawCommand(&m_img, m_activeSubsSheetIdx, idx, palIdx));
 	}
 }
 
@@ -67,12 +112,12 @@ void TileSheetEditorModel::setActiveSubsheet(const TileSheet::SubSheetIdx &idx)
 
 void TileSheetEditorModel::select(const geo::Point &pt) noexcept {
 	if (!m_selectionOngoing) {
-		m_selectionPt1 = pt;
+		m_selectionOrigin = pt;
 		m_selectionOngoing = true;
-	}
-	if (m_selectionPt2 != pt) {
-		m_selectionPt2 = pt;
-		m_selectionBounds = {m_selectionPt1, m_selectionPt2};
+		m_selectionBounds = {pt, pt};
+		m_updated = true;
+	} else if (m_selectionBounds.pt2() != pt) {
+		m_selectionBounds = {m_selectionOrigin, pt};
 		m_updated = true;
 	}
 }
@@ -83,9 +128,8 @@ void TileSheetEditorModel::completeSelection() noexcept {
 
 void TileSheetEditorModel::clearSelection() noexcept {
 	m_updated = true;
-	m_selectionPt1 = {-1, -1};
-	m_selectionPt2 = {-1, -1};
-	m_selectionBounds = {m_selectionPt1, m_selectionPt2};
+	m_selectionOrigin = {-1, -1};
+	m_selectionBounds = {{-1, -1}, {-1, -1}};
 }
 
 bool TileSheetEditorModel::updated() const noexcept {
@@ -105,6 +149,7 @@ ox::Error TileSheetEditorModel::markUpdated(int cmdId) noexcept {
 			break;
 		}
 		case CommandId::Draw:
+		case CommandId::Paste:
 		case CommandId::UpdateSubSheet:
 			break;
 	}
@@ -116,19 +161,19 @@ void TileSheetEditorModel::ackUpdate() noexcept {
 }
 
 ox::Error TileSheetEditorModel::saveFile() noexcept {
-	auto sctx = applicationData<studio::StudioContext>(m_ctx);
+	const auto sctx = applicationData<studio::StudioContext>(m_ctx);
 	oxReturnError(sctx->project->writeObj(m_path, &m_img));
 	return m_ctx->assetManager.setAsset(m_path, m_img).error;
 }
 
 bool TileSheetEditorModel::pixelSelected(std::size_t idx) const noexcept {
-	auto s = activeSubSheet();
-	auto pt = idxToPt(idx, s->columns);
+	const auto s = activeSubSheet();
+	const auto pt = idxToPt(idx, s->columns);
 	return m_selectionBounds.contains(pt);
 }
 
 void TileSheetEditorModel::getFillPixels(bool *pixels, const geo::Point &pt, int oldColor) const noexcept {
-	auto &activeSubSheet = *this->activeSubSheet();
+	const auto &activeSubSheet = *this->activeSubSheet();
 	const auto tileIdx = [activeSubSheet](const geo::Point &pt) noexcept {
 		return ptToIdx(pt, activeSubSheet.columns) / PixelsPerTile;
 	};