From f84c96ad28f97b309709a4663df6d9d1988ace2f Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Wed, 25 Oct 2017 09:56:15 +1100
Subject: [PATCH] Port GameMode to C.

---
 ClassicalSharp/Mode/Creative.cs   |  2 +-
 src/Client/Client.vcxproj         |  2 +
 src/Client/Client.vcxproj.filters |  6 ++
 src/Client/GameMode.c             | 94 +++++++++++++++++++++++++++----
 4 files changed, 93 insertions(+), 11 deletions(-)

diff --git a/ClassicalSharp/Mode/Creative.cs b/ClassicalSharp/Mode/Creative.cs
index 97e7b98e4..cb32c763f 100644
--- a/ClassicalSharp/Mode/Creative.cs
+++ b/ClassicalSharp/Mode/Creative.cs
@@ -54,7 +54,7 @@ namespace ClassicalSharp.Mode {
 			if (!inv.CanChangeSelected() || inv.Selected == old) return;
 			
 			// Is the currently selected block an empty slot
-			if (inv.Hotbar[inv.SelectedIndex] == Block.Air) { 
+			if (inv[inv.SelectedIndex] == Block.Air) { 
 				inv.Selected = old; return; 
 			}
 			
diff --git a/src/Client/Client.vcxproj b/src/Client/Client.vcxproj
index 8d4c67d09..5f1491122 100644
--- a/src/Client/Client.vcxproj
+++ b/src/Client/Client.vcxproj
@@ -201,6 +201,7 @@
     <ClInclude Include="Formats.h" />
     <ClInclude Include="FrustumCulling.h" />
     <ClInclude Include="Deflate.h" />
+    <ClInclude Include="GameMode.h" />
     <ClInclude Include="Gui.h" />
     <ClInclude Include="IModel.h" />
     <ClInclude Include="Input.h" />
@@ -272,6 +273,7 @@
     <ClCompile Include="ExtMath.c" />
     <ClCompile Include="Formats.c" />
     <ClCompile Include="Game.c" />
+    <ClCompile Include="GameMode.c" />
     <ClCompile Include="Gui.c" />
     <ClCompile Include="Inventory.c" />
     <ClCompile Include="MapGenerator.c" />
diff --git a/src/Client/Client.vcxproj.filters b/src/Client/Client.vcxproj.filters
index 6a6b1f1e9..e6c2777d5 100644
--- a/src/Client/Client.vcxproj.filters
+++ b/src/Client/Client.vcxproj.filters
@@ -372,6 +372,9 @@
     <ClInclude Include="Screens.h">
       <Filter>Header Files\2D</Filter>
     </ClInclude>
+    <ClInclude Include="GameMode.h">
+      <Filter>Header Files\Game</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Noise.c">
@@ -575,5 +578,8 @@
     <ClCompile Include="Screens.c">
       <Filter>Source Files\2D</Filter>
     </ClCompile>
+    <ClCompile Include="GameMode.c">
+      <Filter>Source Files\Game</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/Client/GameMode.c b/src/Client/GameMode.c
index b5c6976f3..8fc28454f 100644
--- a/src/Client/GameMode.c
+++ b/src/Client/GameMode.c
@@ -1,13 +1,87 @@
 #include "GameMode.h"
+#include "Inventory.h"
+#include "Widgets.h"
+#include "Game.h"
+#include "Screens.h"
+#include "Block.h"
+#include "Events.h"
 
-IGameComponent GameMode_MakeComponent(void);
+void GameMode_Init(void) {
+	BlockID* inv = Inventory_Table;
+	inv[0] = BlockID_Stone;  inv[1] = BlockID_Cobblestone; inv[2] = BlockID_Brick;
+	inv[3] = BlockID_Dirt;   inv[4] = BlockID_Wood;        inv[5] = BlockID_Log;
+	inv[6] = BlockID_Leaves; inv[7] = BlockID_Grass;       inv[8] = BlockID_Slab;
+}
 
-bool GameMode_HandlesKeyDown(Key key);
-bool GameMode_PickingLeft(void);
-bool GameMode_PickingRight(void);
-void GameMode_PickLeft(BlockID old);
-void GameMode_PickMiddle(BlockID old);
-void GameMode_PickRight(BlockID old, BlockID block);
-HotbarWidget* GameMode_MakeHotbar(void);
-void GameMode_BeginFrame(Real64 delta);
-void GameMode_EndFrame(Real64 delta);
\ No newline at end of file
+IGameComponent GameMode_MakeComponent(void) {
+	IGameComponent comp = IGameComponent_MakeEmpty();
+	comp.Init = GameMode_Init;
+	return comp;
+}
+
+bool GameMode_HandlesKeyDown(Key key) {
+	Screen* activeScreen = Gui_GetActiveScreen();
+	if (key == KeyBind_Get(KeyBind_Inventory) && activeScreen == Gui_HUD) {
+		Screen* screen = InventoryScreen_MakeInstance();
+		Gui_SetNewScreen(screen);
+		return true;
+	} else if (key == KeyBind_Get(KeyBind_DropBlock) && !Game_ClassicMode) {
+		if (Inventory_CanChangeSelected()) {
+			/* Don't assign SelectedIndex directly, because we don't want held block
+			   switching positions if they already have air in their inventory hotbar. */
+			Inventory_Set(Inventory_SelectedIndex, BlockID_Air);
+			Event_RaiseVoid(&UserEvents_HeldBlockChanged);
+		}
+		return true;
+	}
+	return false;
+}
+
+bool GameMode_PickingLeft(void) {
+	/* always play delete animations, even if we aren't picking a block */
+	game.HeldBlockRenderer.ClickAnim(true);
+	return false;
+}
+bool GameMode_PickingRight(void) { return false; }
+
+void GameMode_PickLeft(BlockID old) {
+	Vector3I pos = Game_SelectedPos.BlockPos;
+	Game_UpdateBlock(pos.X, pos.Y, pos.Z, BlockID_Air);
+	Event_RaiseBlock(&UserEvents_BlockChanged, pos, old, BlockID_Air);
+}
+
+void GameMode_PickMiddle(BlockID old) {
+	if (Block_Draw[old] == DrawType_Gas) return;
+	if (!(Block_CanPlace[old] || Block_CanDelete[old])) return;
+	if (!Inventory_CanChangeSelected() || Inventory_SelectedBlock == old) return;
+
+	// Is the currently selected block an empty slot
+	if (Inventory_Get(Inventory_SelectedIndex) == BlockID_Air) {
+		Inventory_SetSelectedBlock(old);
+		return;
+	}
+
+	/* Try to replace same block or empty slots first */
+	UInt32 i;
+	for (i = 0; i < INVENTORY_BLOCKS_PER_HOTBAR; i++) {
+		if (Inventory_Get(i) != old && Inventory_Get(i) != BlockID_Air) continue;
+
+		Inventory_Set(i, old);
+		Inventory_SetSelectedIndex(i);
+		return;
+	}
+
+	/* Finally, replace the currently selected block */
+	Inventory_SetSelectedBlock(old);
+}
+
+void GameMode_PickRight(BlockID old, BlockID block) {
+	Vector3I pos = Game_SelectedPos.TranslatedPos;
+	Game_UpdateBlock(pos.X, pos.Y, pos.Z, block);
+	Event_RaiseBlock(&UserEvents_BlockChanged, pos, old, block);
+}
+
+HotbarWidget GameMode_Hotbar;
+HotbarWidget* GameMode_MakeHotbar(void) { return &GameMode_Hotbar; }
+void GameMode_BeginFrame(Real64 delta) { }
+void GameMode_EndFrame(Real64 delta) { }
\ No newline at end of file