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#pragma once
#include <imgui.h>
#include <cstddef>
#include <functional>
#include <string>
#include <string_view>
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;
};
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;
};
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;
public:
EditorCommandPalette();
~EditorCommandPalette();
EditorCommandPalette(const EditorCommandPalette&) = delete;
EditorCommandPalette& operator=(const EditorCommandPalette&) = delete;
EditorCommandPalette(EditorCommandPalette&&) = default;
EditorCommandPalette& operator=(EditorCommandPalette&&) = default;
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);
void Show(bool* open = nullptr);
enum ItemType {
CommandItem,
CommandOptionItem,
};
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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