rework mime types, support pasting file lists, SIP when dropping single files

src/sdl_clipboard_utils.cpp

@@ -2,22 +2,67 @@
 
 #include <SDL3/SDL.h>
 
+#include <string_view>
 #include <vector>
+#include <algorithm>
 
-const char* clipboardHasImage(void) {
-	const static std::vector<const char*> image_mime_types {
-		"image/png",
-		"image/webp",
-		"image/gif",
-		"image/jpeg",
-		"image/bmp",
-	};
-
-	for (const char* mime_type : image_mime_types) {
-		if (SDL_HasClipboardData(mime_type) == SDL_TRUE) {
-			return mime_type;
+static const char* clipboardHas(const std::vector<std::string_view>& filter_mime_types) {
+	for (const auto& mime_type : filter_mime_types) {
+		// ASSERTS that stringview is null terminated
+		if (SDL_HasClipboardData(mime_type.data()) == SDL_TRUE) {
+			return mime_type.data();
 		}
 	}
 
 	return nullptr;
 }
+
+const static std::vector<std::string_view> image_mime_types {
+	"image/svg+xml",
+	"image/jxl",
+	"image/avif",
+	"image/apng",
+	"image/webp",
+	"image/png",
+	"image/gif",
+	"image/jpeg",
+	"image/qoi",
+	"image/bmp",
+	// tiff?
+};
+
+const static std::vector<std::string_view> file_list_mime_types {
+	"text/uri-list",
+	"text/x-moz-url",
+};
+
+const char* clipboardHasImage(void) {
+	return clipboardHas(image_mime_types);
+}
+
+const char* clipboardHasFileList(void) {
+	return clipboardHas(file_list_mime_types);
+}
+
+bool mimeIsImage(const char* mime_type) {
+	if (mime_type == nullptr) {
+		return false;
+	}
+
+	std::string_view mt_sv {mime_type};
+	auto it = std::find(image_mime_types.cbegin(), image_mime_types.cend(), mime_type);
+
+	return it != image_mime_types.cend();
+}
+
+bool mimeIsFileList(const char* mime_type) {
+	if (mime_type == nullptr) {
+		return false;
+	}
+
+	std::string_view mt_sv {mime_type};
+	auto it = std::find(file_list_mime_types.cbegin(), file_list_mime_types.cend(), mime_type);
+
+	return it != image_mime_types.cend();
+}
+