From 42b3866753840b2cd8cbdef64fcaf4b5206e66e3 Mon Sep 17 00:00:00 2001
From: Green Sky <green@g-s.xyz>
Date: Sun, 30 Jul 2023 15:10:26 +0200
Subject: [PATCH] start thinking about pasting files

---
 src/CMakeLists.txt          |  2 ++
 src/chat_gui4.cpp           | 13 +++++++++++++
 src/main.cpp                |  6 +++++-
 src/main_screen.cpp         |  4 ++++
 src/main_screen.hpp         |  2 ++
 src/screen.hpp              |  5 +++++
 src/sdl_clipboard_utils.cpp | 23 +++++++++++++++++++++++
 src/sdl_clipboard_utils.hpp |  6 ++++++
 8 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 src/sdl_clipboard_utils.cpp
 create mode 100644 src/sdl_clipboard_utils.hpp

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ca8f5226..a4a38639 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,6 +19,8 @@ add_executable(tomato
 	texture_uploader.hpp
 	./sdlrenderer_texture_uploader.hpp
 	./sdlrenderer_texture_uploader.cpp
+	./sdl_clipboard_utils.hpp
+	./sdl_clipboard_utils.cpp
 	./file_selector.hpp
 	./file_selector.cpp
 
diff --git a/src/chat_gui4.cpp b/src/chat_gui4.cpp
index b9f2f314..de16df1c 100644
--- a/src/chat_gui4.cpp
+++ b/src/chat_gui4.cpp
@@ -11,6 +11,11 @@
 #include <imgui/imgui.h>
 #include <imgui/misc/cpp/imgui_stdlib.h>
 
+#include <SDL3/SDL.h>
+
+#include "./sdl_clipboard_utils.hpp"
+#include "SDL_clipboard.h"
+
 #include <string>
 #include <variant>
 #include <vector>
@@ -256,6 +261,14 @@ void ChatGui4::render(void) {
 					}
 				}
 				ImGui::EndChild();
+
+				if (ImGui::IsKeyPressed(ImGuiKey_V) && ImGui::IsKeyPressed(ImGuiMod_Shortcut)) {
+					if (const auto* mime_type = clipboardHasImage(); mime_type != nullptr) {
+						size_t data_size = 0;
+						const auto* data = SDL_GetClipboardData(mime_type, &data_size);
+						// open file send preview.rawpixels
+					}
+				}
 			}
 			ImGui::EndChild();
 		}
diff --git a/src/main.cpp b/src/main.cpp
index 42a1a1d0..ec0f3ba1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,7 +6,6 @@
 #include <imgui/backends/imgui_impl_sdlrenderer3.h>
 
 #include "./theme.hpp"
-#include "./sdlrenderer_texture_uploader.hpp"
 
 #include "./start_screen.hpp"
 
@@ -63,6 +62,11 @@ int main(int argc, char** argv) {
 				quit = true;
 				break;
 			}
+
+			if (screen->handleEvent(event)) {
+				continue;
+			}
+
 			ImGui_ImplSDL3_ProcessEvent(&event);
 		}
 		if (quit) {
diff --git a/src/main_screen.cpp b/src/main_screen.cpp
index 5d4cfa43..6a2f5a36 100644
--- a/src/main_screen.cpp
+++ b/src/main_screen.cpp
@@ -55,6 +55,10 @@ MainScreen::MainScreen(SDL_Renderer* renderer_, std::string save_path) :
 MainScreen::~MainScreen(void) {
 }
 
+bool MainScreen::handleEvent(SDL_Event& e) {
+	return false;
+}
+
 Screen* MainScreen::poll(bool& quit) {
 	auto new_time = std::chrono::high_resolution_clock::now();
 	const float time_delta {std::chrono::duration<float, std::chrono::seconds::period>(new_time - last_time).count()};
diff --git a/src/main_screen.hpp b/src/main_screen.hpp
index c8c71f5b..6f9de6a2 100644
--- a/src/main_screen.hpp
+++ b/src/main_screen.hpp
@@ -55,6 +55,8 @@ struct MainScreen final : public Screen {
 	MainScreen(SDL_Renderer* renderer_, std::string save_path);
 	~MainScreen(void);
 
+	bool handleEvent(SDL_Event& e) override;
+
 	// return nullptr if not next
 	// sets bool quit to true if exit
 	Screen* poll(bool&) override;
diff --git a/src/screen.hpp b/src/screen.hpp
index c48d9d1f..238f014f 100644
--- a/src/screen.hpp
+++ b/src/screen.hpp
@@ -1,8 +1,13 @@
 #pragma once
 
+#include <SDL3/SDL.h>
+
 struct Screen {
 	virtual ~Screen(void) = default;
 
+	// return true if handled
+	virtual bool handleEvent(SDL_Event& e) { return false; }
+
 	// return nullptr if not next
 	// sets bool quit to true if exit
 	virtual Screen* poll(bool& quit) = 0;
diff --git a/src/sdl_clipboard_utils.cpp b/src/sdl_clipboard_utils.cpp
new file mode 100644
index 00000000..3968462d
--- /dev/null
+++ b/src/sdl_clipboard_utils.cpp
@@ -0,0 +1,23 @@
+#include "./sdl_clipboard_utils.hpp"
+
+#include <SDL3/SDL.h>
+
+#include <vector>
+
+const char* clipboardHasImage(void) {
+	const static std::vector<const char*> image_mime_types {
+		"image/webp",
+		"image/png",
+		"image/gif",
+		"image/jpeg",
+		"image/bmp",
+	};
+
+	for (const char* mime_type : image_mime_types) {
+		if (SDL_HasClipboardData(mime_type) == SDL_TRUE) {
+			return mime_type;
+		}
+	}
+
+	return nullptr;
+}
diff --git a/src/sdl_clipboard_utils.hpp b/src/sdl_clipboard_utils.hpp
new file mode 100644
index 00000000..3e1fd52e
--- /dev/null
+++ b/src/sdl_clipboard_utils.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+// returns the mimetype (c-string) of the image in the clipboard
+// or nullptr, if there is none
+const char* clipboardHasImage(void);
+