Show save button thumbnail in the preview if it's available

This is good enough for now but also more limited than I'd like because if the thumbnail arrives (gets rendered or downloaded) later than the preview is opened, it's never shown.

src/gui/game/GameController.cpp

@@ -1213,7 +1213,7 @@ void GameController::OpenSaveDone()
 
 void GameController::OpenSavePreview(int saveID, int saveDate, bool instant)
 {
-	activePreview = new PreviewController(saveID, saveDate, instant, [this] { OpenSaveDone(); });
+	activePreview = new PreviewController(saveID, saveDate, instant, [this] { OpenSaveDone(); }, nullptr);
 	ui::Engine::Ref().ShowWindow(activePreview->GetView());
 }
 
@@ -1221,7 +1221,7 @@ void GameController::OpenSavePreview()
 {
 	if(gameModel->GetSave())
 	{
-		activePreview = new PreviewController(gameModel->GetSave()->GetID(), 0, false, [this] { OpenSaveDone(); });
+		activePreview = new PreviewController(gameModel->GetSave()->GetID(), 0, false, [this] { OpenSaveDone(); }, nullptr);
 		ui::Engine::Ref().ShowWindow(activePreview->GetView());
 	}
 }

src/gui/game/GameController.h

@@ -21,6 +21,7 @@ class SearchController;
 class PreviewController;
 class RenderController;
 class CommandInterface;
+class VideoBuffer;
 class Tool;
 class Menu;
 class SaveInfo;

src/gui/interface/SaveButton.cpp

@@ -401,4 +401,13 @@ void SaveButton::DoSelection()
 		actionCallback.selected();
 }
 
+std::unique_ptr<VideoBuffer> SaveButton::CloneThumbnail() const
+{
+	if (thumbnail)
+	{
+		return std::make_unique<VideoBuffer>(*thumbnail);
+	}
+	return nullptr;
+}
+
 } /* namespace ui */

src/gui/interface/SaveButton.h

@@ -75,6 +75,11 @@ public:
 	void DoAltAction2();
 	void DoSelection();
 	inline void SetActionCallback(SaveButtonAction action) { actionCallback = action; }
+
+	// TODO: clone the request instead because sometimes the user of CloneThumbnail might end up
+	// with a nullptr even though the thumbnail for the SaveButton will eventually arrive.
+	std::unique_ptr<VideoBuffer> CloneThumbnail() const;
+
 protected:
 	bool isButtonDown, state, isMouseInside, selected, selectable;
 };

src/gui/preview/PreviewController.cpp

@@ -7,19 +7,20 @@
 #include "client/SaveInfo.h"
 #include "client/GameSave.h"
 #include "common/platform/Platform.h"
+#include "graphics/Graphics.h"
 #include "gui/dialogues/ErrorMessage.h"
 #include "gui/dialogues/InformationMessage.h"
 #include "gui/login/LoginController.h"
 #include "gui/login/LoginView.h"
 #include "Config.h"
 
-PreviewController::PreviewController(int saveID, int saveDate, bool instant, std::function<void ()> onDone_):
+PreviewController::PreviewController(int saveID, int saveDate, bool instant, std::function<void ()> onDone_, std::unique_ptr<VideoBuffer> thumbnail):
 	saveId(saveID),
 	loginWindow(NULL),
 	HasExited(false)
 {
 	previewModel = new PreviewModel();
-	previewView = new PreviewView();
+	previewView = new PreviewView(std::move(thumbnail));
 	previewModel->AddObserver(previewView);
 	previewView->AttachController(this);
 	previewModel->SetDoOpen(instant);

src/gui/preview/PreviewController.h

@@ -3,6 +3,7 @@
 #include <functional>
 #include <memory>
 
+class VideoBuffer;
 class SaveInfo;
 class LoginController;
 class PreviewModel;
@@ -18,7 +19,7 @@ public:
 	inline int SaveID() { return saveId; }
 
 	bool HasExited;
-	PreviewController(int saveID, int saveDate, bool instant, std::function<void ()> onDone = nullptr);
+	PreviewController(int saveID, int saveDate, bool instant, std::function<void ()> onDone, std::unique_ptr<VideoBuffer> thumbnail);
 	void Exit();
 	void DoOpen();
 	void OpenInBrowser();

src/gui/preview/PreviewView.cpp

@@ -33,9 +33,8 @@
 # undef GetUserName // dammit windows
 #endif
 
-PreviewView::PreviewView():
+PreviewView::PreviewView(std::unique_ptr<VideoBuffer> newSavePreview):
 	ui::Window(ui::Point(-1, -1), ui::Point((XRES/2)+210, (YRES/2)+150)),
-	savePreview(nullptr),
 	submitCommentButton(NULL),
 	addCommentBox(NULL),
 	commentWarningLabel(NULL),
@@ -48,6 +47,11 @@ PreviewView::PreviewView():
 	commentBoxHeight(20),
 	commentHelpText(false)
 {
+	if (newSavePreview)
+	{
+		newSavePreview->Resize(RES / 2, true);
+		savePreview = std::move(newSavePreview);
+	}
 	showAvatars = ui::Engine::Ref().ShowAvatars;
 
 	favButton = new ui::Button(ui::Point(50, Size.Y-19), ui::Point(51, 19), "Fav");
@@ -416,7 +420,6 @@ void PreviewView::OnKeyPress(int key, int scan, bool repeat, bool shift, bool ct
 void PreviewView::NotifySaveChanged(PreviewModel * sender)
 {
 	auto *save = sender->GetSaveInfo();
-	savePreview = nullptr;
 	if(save)
 	{
 		votesUp = save->votesUp;

src/gui/preview/PreviewView.h

@@ -66,7 +66,7 @@ class PreviewView: public ui::Window
 	void CheckComment();
 public:
 	void AttachController(PreviewController * controller);
-	PreviewView();
+	PreviewView(std::unique_ptr<VideoBuffer> newSavePreviev);
 	void NotifySaveChanged(PreviewModel * sender);
 	void NotifyCommentsChanged(PreviewModel * sender);
 	void NotifyCommentsPageChanged(PreviewModel * sender);

src/gui/search/SearchController.cpp

@@ -204,21 +204,12 @@ void SearchController::OpenSaveDone()
 	}
 }
 
-void SearchController::OpenSave(int saveID)
+void SearchController::OpenSave(int saveID, int saveDate, std::unique_ptr<VideoBuffer> thumbnail)
 {
 	delete activePreview;
 	Graphics * g = searchView->GetGraphics();
 	g->BlendFilledRect(RectSized(Vec2{ XRES/3, WINDOWH-20 }, Vec2{ XRES/3, 20 }), 0x000000_rgb .WithAlpha(150)); //dim the "Page X of Y" a little to make the CopyTextButton more noticeable
-	activePreview = new PreviewController(saveID, 0, instantOpen, [this] { OpenSaveDone(); });
-	activePreview->GetView()->MakeActiveWindow();
-}
-
-void SearchController::OpenSave(int saveID, int saveDate)
-{
-	delete activePreview;
-	Graphics * g = searchView->GetGraphics();
-	g->BlendFilledRect(RectSized(Vec2{ XRES/3, WINDOWH-20 }, Vec2{ XRES/3, 20 }), 0x000000_rgb .WithAlpha(150)); //dim the "Page X of Y" a little to make the CopyTextButton more noticeable
-	activePreview = new PreviewController(saveID, saveDate, instantOpen, [this] { OpenSaveDone(); });
+	activePreview = new PreviewController(saveID, saveDate, instantOpen, [this] { OpenSaveDone(); }, std::move(thumbnail));
 	activePreview->GetView()->MakeActiveWindow();
 }
 

src/gui/search/SearchController.h

@@ -8,6 +8,7 @@ class PreviewController;
 class PreviewController;
 class SearchView;
 class SearchModel;
+class VideoBuffer;
 class SearchController
 {
 private:
@@ -42,8 +43,7 @@ public:
 	void Selected(int saveID, bool selected);
 	void SelectAllSaves();
 	void InstantOpen(bool instant);
-	void OpenSave(int saveID);
-	void OpenSave(int saveID, int saveDate);
+	void OpenSave(int saveID, int saveDate, std::unique_ptr<VideoBuffer> thumbnail);
 	void Update();
 	void ClearSelection();
 	void RemoveSelected();

src/gui/search/SearchView.cpp

@@ -562,7 +562,7 @@ void SearchView::NotifySaveListChanged(SearchModel * sender)
 						saves[i]);
 			saveButton->AddContextMenu(0);
 			saveButton->SetActionCallback({
-				[this, saveButton] { c->OpenSave(saveButton->GetSave()->GetID(), saveButton->GetSave()->GetVersion()); },
+				[this, saveButton] { c->OpenSave(saveButton->GetSave()->GetID(), saveButton->GetSave()->GetVersion(), saveButton->CloneThumbnail()); },
 				[this, saveButton] { Search(String::Build("history:", saveButton->GetSave()->GetID())); },
 				[this, saveButton] { Search(String::Build("user:", saveButton->GetSave()->GetUserName().FromUtf8())); },
 				[this, saveButton] { c->Selected(saveButton->GetSave()->GetID(), saveButton->GetSelected()); }