From 39a2045a438e963af2e2d5b65762890c621e172b Mon Sep 17 00:00:00 2001
From: MorganDavid <xephex9001@gmail.com>
Date: Thu, 28 May 2020 23:11:26 +0100
Subject: [PATCH] Added swap checkerboard colors command

---
 data/strings/en.ini                           |  1 +
 src/app/CMakeLists.txt                        |  1 +
 .../commands/cmd_swap_checkerboard_colors.cpp | 53 +++++++++++++++++++
 src/app/commands/commands_list.h              |  1 +
 4 files changed, 56 insertions(+)
 create mode 100644 src/app/commands/cmd_swap_checkerboard_colors.cpp

diff --git a/data/strings/en.ini b/data/strings/en.ini
index 616b09d9e..ec3439c6d 100644
--- a/data/strings/en.ini
+++ b/data/strings/en.ini
@@ -439,6 +439,7 @@ SpriteProperties = Sprite Properties
 SpriteSize = Sprite Size
 Stroke = Stroke Selection Borders with Foreground Color
 SwitchColors = Switch Colors
+SwapCheckerboardColors = Swap Checkerboard Background Colors
 SwitchNonactiveLayersOpacity = Switch Nonactive Layers Opacity
 SymmetryMode = Symmetry Mode
 TiledMode = Tiled Mode
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 13f30a70b..4b6bb5eda 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -283,6 +283,7 @@ if(ENABLE_UI)
     commands/cmd_show.cpp
     commands/cmd_slice_properties.cpp
     commands/cmd_sprite_properties.cpp
+    commands/cmd_swap_checkerboard_colors.cpp
     commands/cmd_switch_colors.cpp
     commands/cmd_symmetry_mode.cpp
     commands/cmd_tiled_mode.cpp
diff --git a/src/app/commands/cmd_swap_checkerboard_colors.cpp b/src/app/commands/cmd_swap_checkerboard_colors.cpp
new file mode 100644
index 000000000..2022581cf
--- /dev/null
+++ b/src/app/commands/cmd_swap_checkerboard_colors.cpp
@@ -0,0 +1,53 @@
+// Aseprite
+// Copyright (C) 2001-2015  David Capello
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "app/app.h"
+#include "app/commands/command.h"
+#include "app/modules/editors.h"
+#include "app/ui/editor/editor.h"
+#include "ui/base.h"
+#include "app/context.h"
+
+namespace app {
+
+    class SwapCheckerboardColorsCommand : public Command {
+    public:
+        SwapCheckerboardColorsCommand();
+
+    protected:
+        bool onEnabled(Context* context) override;
+        void onExecute(Context* context) override;
+    };
+
+    SwapCheckerboardColorsCommand::SwapCheckerboardColorsCommand()
+        : Command(CommandId::SwapCheckerboardColors(), CmdUIOnlyFlag)
+    {
+    }
+
+    bool SwapCheckerboardColorsCommand::onEnabled(Context* context)
+    {
+        return true;
+    }
+
+    void SwapCheckerboardColorsCommand::onExecute(Context* context)
+    {
+        DocumentPreferences& docPref = Preferences::instance().document(context->activeDocument());
+        app::Color c1 = docPref.bg.color1();
+        app::Color c2 = docPref.bg.color2();
+
+        docPref.bg.color1(c2);
+        docPref.bg.color2(c1);
+    }
+    Command* CommandFactory::createSwapCheckerboardColorsCommand()
+    {
+        return new SwapCheckerboardColorsCommand;
+    }
+
+} // namespace app
diff --git a/src/app/commands/commands_list.h b/src/app/commands/commands_list.h
index 9ae1c9648..03b5ea124 100644
--- a/src/app/commands/commands_list.h
+++ b/src/app/commands/commands_list.h
@@ -151,6 +151,7 @@ FOR_EACH_COMMAND(SliceProperties)
 FOR_EACH_COMMAND(SnapToGrid)
 FOR_EACH_COMMAND(SpriteProperties)
 FOR_EACH_COMMAND(Stroke)
+FOR_EACH_COMMAND(SwapCheckerboardColors)
 FOR_EACH_COMMAND(SwitchColors)
 FOR_EACH_COMMAND(SymmetryMode)
 FOR_EACH_COMMAND(TiledMode)