From e826894632f59c214c309d934843c49d73103612 Mon Sep 17 00:00:00 2001
From: hnOsmium0001 <hn.osmium0001@gmail.com>
Date: Mon, 25 Apr 2022 20:32:25 -0700
Subject: Replace EditorCommandPalette.hpp/cpp with the copy from P6503

---
 source/EditorCommandPalette.hpp | 109 ++++++++++++++++++++++++++++------------
 1 file changed, 77 insertions(+), 32 deletions(-)

(limited to 'source/EditorCommandPalette.hpp')

diff --git a/source/EditorCommandPalette.hpp b/source/EditorCommandPalette.hpp
index 1603f41..101344d 100644
--- a/source/EditorCommandPalette.hpp
+++ b/source/EditorCommandPalette.hpp
@@ -2,48 +2,93 @@
 
 #include <imgui.h>
 #include <cstddef>
-#include <cstdint>
 #include <functional>
 #include <string>
-#include <vector>
+#include <string_view>
 
-enum ImCmdTextType {
-	ImCmdTextType_Regular,
-	ImCmdTextType_Highlight,
-	ImCmdTextType_COUNT,
+class EditorCommandExecuteContext;
+class EditorCommand {
+public:
+	std::string name;
+	std::function<void(EditorCommandExecuteContext& ctx)> callback;
+	std::function<void(EditorCommandExecuteContext& ctx, size_t selectedOptionId)> subsequentCallback;
+	std::function<void()> terminate;
 };
 
-namespace ImCmd {
-struct Command {
-	const char* Name;
-	std::function<void()> InitialCallback;
-	std::function<void(int selected_option)> SubsequentCallback;
-	std::function<void()> TerminatingCallback;
+class EditorCommandExecuteContext {
+	friend class EditorCommandPalette;
+
+private:
+	const EditorCommand* mCommand = nullptr;
+	std::vector<std::string> mCurrentOptions;
+	int mDepth = 0;
+
+public:
+	bool IsInitiated() const;
+	const EditorCommand* GetCurrentCommand() const;
+	void Initiate(const EditorCommand& command);
+
+	void Prompt(std::vector<std::string> options);
+	void Finish();
+
+	/// Return the number of prompts that the user is currently completing. For example, when the user opens command
+	/// palette fresh and selects a command, 0 is returned. If the command asks some prompt, and then the user selects
+	/// again, 1 is returned.
+	int GetExecutionDepth() const;
 };
 
-// Command management
-void AddCommand(Command command);
-void RemoveCommand(const char* name);
+class EditorCommandPalette {
+private:
+	struct SearchResult;
+	struct Item;
+
+	std::vector<EditorCommand> mCommands;
+	std::vector<Item> mItems;
+	std::vector<SearchResult> mSearchResults;
+	std::string mSearchText;
+	EditorCommandExecuteContext mExeCtx;
+	int mFocusedItemId = 0;
+	bool mFocusSearchBox = false;
+	bool mShouldCloseNextFrame = false;
 
-// Styling
-void SetStyleFont(ImCmdTextType type, ImFont* font);
-void SetStyleColor(ImCmdTextType type, ImU32 color);
-void ClearStyleColor(ImCmdTextType type); //< Clear the style color for the given type, defaulting to ImGuiCol_Text
+public:
+	EditorCommandPalette();
+	~EditorCommandPalette();
 
-// Command palette widget
-void SetNextCommandPaletteSearch(const char* text);
-void SetNextCommandPaletteSearchBoxFocused();
-void ShowCommandPalette(const char* name);
-bool IsAnyItemSelected();
+	EditorCommandPalette(const EditorCommandPalette&) = delete;
+	EditorCommandPalette& operator=(const EditorCommandPalette&) = delete;
+	EditorCommandPalette(EditorCommandPalette&&) = default;
+	EditorCommandPalette& operator=(EditorCommandPalette&&) = default;
 
-void RemoveCache(const char* name);
-void RemoveAllCaches();
+	void AddCommand(std::string_view category, std::string_view name, EditorCommand command);
+	void RemoveCommand(std::string_view category, std::string_view name);
+	void RemoveCommand(const std::string& commandName);
 
-// Command palette widget in a window helper
-void SetNextWindowAffixedTop(ImGuiCond cond = 0);
-void ShowCommandPaletteWindow(const char* name, bool* p_open);
+	void Show(bool* open = nullptr);
 
-// Command responses, only call these in command callbacks (except TerminatingCallback)
-void Prompt(std::vector<std::string> options);
+	enum ItemType {
+		CommandItem,
+		CommandOptionItem,
+	};
 
-} // namespace ImCmd
+	enum IndexType {
+		DirectIndex,
+		SearchResultIndex,
+	};
+
+	struct ItemInfo {
+		const char* text;
+		const EditorCommand* command;
+		int itemId;
+		ItemType itemType;
+		IndexType indexType;
+	};
+
+	size_t GetItemCount() const;
+	ItemInfo GetItem(size_t idx) const;
+
+	void SelectFocusedItem();
+
+private:
+	void InvalidateSearchResults();
+};
-- 
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