From 34f5b833d86ea1dad98d683723cf05a17684237b Mon Sep 17 00:00:00 2001
From: Aldrik Ramaekers <aldrikboy@gmail.com>
Date: Thu, 7 Mar 2024 20:49:22 +0100
Subject: add ImFileDialog with minor changes

---
 imfiledialog/ImFileDialog.h | 136 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 imfiledialog/ImFileDialog.h

(limited to 'imfiledialog/ImFileDialog.h')

diff --git a/imfiledialog/ImFileDialog.h b/imfiledialog/ImFileDialog.h
new file mode 100644
index 0000000..76b2123
--- /dev/null
+++ b/imfiledialog/ImFileDialog.h
@@ -0,0 +1,136 @@
+#pragma once
+#include <ctime>
+#include <stack>
+#include <string>
+#include <thread>
+#include <vector>
+#include <functional>
+#include <filesystem>
+#include <unordered_map>
+#include <algorithm> // std::min, std::max
+
+#define IFD_DIALOG_FILE			0
+#define IFD_DIALOG_DIRECTORY	1
+#define IFD_DIALOG_SAVE			2
+
+namespace ifd {
+	class FileDialog {
+	public:
+		static inline FileDialog& Instance()
+		{
+			static FileDialog ret;
+			return ret;
+		}
+
+		FileDialog();
+		~FileDialog();
+
+		bool Save(const std::string& key, const std::string& title, const std::string& filter, const std::string& startingDir = "");
+
+		bool Open(const std::string& key, const std::string& title, const std::string& filter, bool isMultiselect = false, const std::string& startingDir = "");
+
+		bool IsDone(const std::string& key, int window_w, int window_h);
+
+		inline bool HasResult() { return m_result.size(); }
+		inline const std::filesystem::path& GetResult() { return m_result[0]; }
+		inline const std::vector<std::filesystem::path>& GetResults() { return m_result; }
+
+		void Close();
+
+		inline void SetZoom(float z) { 
+			m_zoom = std::min<float>(25.0f, std::max<float>(1.0f, z)); 
+			m_refreshIconPreview();
+		}
+		inline float GetZoom() { return m_zoom; }
+
+		std::function<void*(uint8_t*, int, int, char)> CreateTexture; // char -> fmt -> { 0 = BGRA, 1 = RGBA }
+		std::function<void(void*)> DeleteTexture;
+
+		class FileTreeNode {
+		public:
+#ifdef _WIN32
+			FileTreeNode(const std::wstring& path) {
+				Path = std::filesystem::path(path);
+				Read = false;
+			}
+#endif
+
+			FileTreeNode(const std::string& path) {
+				Path = std::filesystem::u8path(path);
+				Read = false;
+			}
+
+			std::filesystem::path Path;
+			bool Read;
+			std::vector<FileTreeNode*> Children;
+		};
+		class FileData {
+		public:
+			FileData(const std::filesystem::path& path);
+
+			std::filesystem::path Path;
+			bool IsDirectory;
+			size_t Size;
+			time_t DateModified;
+
+			bool HasIconPreview;
+			void* IconPreview;
+			uint8_t* IconPreviewData;
+			int IconPreviewWidth, IconPreviewHeight;
+		};
+
+	private:
+		std::string m_currentKey;
+		std::string m_currentTitle;
+		std::filesystem::path m_currentDirectory;
+		bool m_isMultiselect;
+		bool m_isOpen;
+		uint8_t m_type;
+		char m_inputTextbox[1024];
+		char m_pathBuffer[1024];
+		char m_newEntryBuffer[1024];
+		char m_searchBuffer[128];
+		bool m_calledOpenPopup;
+		std::stack<std::filesystem::path> m_backHistory, m_forwardHistory;
+		float m_zoom;
+
+		std::vector<std::filesystem::path> m_selections;
+		int m_selectedFileItem;
+		void m_select(const std::filesystem::path& path, bool isCtrlDown = false);
+
+		std::vector<std::filesystem::path> m_result;
+		bool m_finalize(const std::string& filename = "");
+
+		std::string m_filter;
+		std::vector<std::vector<std::string>> m_filterExtensions;
+		size_t m_filterSelection;
+		void m_parseFilter(const std::string& filter);
+
+		std::vector<int> m_iconIndices;
+		std::vector<std::string> m_iconFilepaths; // m_iconIndices[x] <-> m_iconFilepaths[x]
+		std::unordered_map<std::string, void*> m_icons;
+		void* m_getIcon(const std::filesystem::path& path);
+		void m_clearIcons();
+		void m_refreshIconPreview();
+		void m_clearIconPreview();
+
+		std::thread* m_previewLoader;
+		bool m_previewLoaderRunning;
+		void m_stopPreviewLoader();
+		void m_loadPreview();
+
+		std::vector<FileTreeNode*> m_treeCache;
+		void m_clearTree(FileTreeNode* node);
+		void m_renderTree(FileTreeNode* node);
+
+		unsigned int m_sortColumn;
+		unsigned int m_sortDirection;
+		std::vector<FileData> m_content;
+		void m_setDirectory(const std::filesystem::path& p, bool addHistory = true);
+		void m_sortContent(unsigned int column, unsigned int sortDirection);
+		void m_renderContent();
+
+		void m_renderPopups();
+		void m_renderFileDialog();
+	};
+}
-- 
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