118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/*
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* Command.h - command model and registry for editor actions
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*/
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#ifndef KTE_COMMAND_H
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#define KTE_COMMAND_H
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#include <functional>
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#include <string>
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#include <vector>
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class Editor;
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// Identifiers for editor commands. This is intentionally small for now and
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// will grow as features are implemented.
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enum class CommandId {
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Save,
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SaveAs,
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// Placeholders for future commands from ke's model
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Quit,
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QuitNow, // immediate quit, no confirmation
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SaveAndQuit,
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Refresh, // force redraw
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KPrefix, // show "C-k _" prompt in status when entering k-command
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FindStart, // begin incremental search (placeholder)
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OpenFileStart, // begin open-file prompt
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// Buffers
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BufferSwitchStart, // begin buffer switch prompt
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BufferClose,
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BufferNext,
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BufferPrev,
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// Editing
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InsertText, // arg: text to insert at cursor (UTF-8, no newlines)
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Newline, // insert a newline at cursor
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Backspace, // delete char before cursor (may join lines)
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DeleteChar, // delete char at cursor (may join lines)
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KillToEOL, // delete from cursor to end of line; if at EOL, delete newline
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KillLine, // delete the entire current line (including newline)
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Yank, // insert most recently killed text at cursor
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// Region/mark and file-boundary navigation
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MoveFileStart, // move to beginning of file
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MoveFileEnd, // move to end of file
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ToggleMark, // toggle mark at cursor
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JumpToMark, // jump to mark, set mark to previous cursor
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KillRegion, // kill region between mark and cursor (to kill ring)
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CopyRegion, // copy region to kill ring (Alt-w)
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FlushKillRing, // clear kill ring
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// Navigation (basic)
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MoveLeft,
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MoveRight,
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MoveUp,
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MoveDown,
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MoveHome,
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MoveEnd,
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PageUp,
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PageDown,
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WordPrev,
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WordNext,
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// Direct cursor placement
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MoveCursorTo, // arg: "y:x" (zero-based row:col)
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// Undo/Redo
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Undo,
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Redo,
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// Meta
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UnknownKCommand, // arg: single character that was not recognized after C-k
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};
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// Context passed to command handlers.
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struct CommandContext {
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Editor &editor;
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// Optional argument string (e.g., filename for SaveAs).
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std::string arg;
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// Optional repeat count (C-u support). 0 means not provided.
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int count = 0;
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};
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using CommandHandler = std::function<bool(CommandContext &)>; // return true on success
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struct Command {
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CommandId id;
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std::string name; // stable, unique name (e.g., "save", "save-as")
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std::string help; // short help/description
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CommandHandler handler;
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};
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// Simple global registry. Not thread-safe; suitable for this app.
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class CommandRegistry {
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public:
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static void Register(const Command &cmd);
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static const Command *FindById(CommandId id);
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static const Command *FindByName(const std::string &name);
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static const std::vector<Command> &All();
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private:
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static std::vector<Command> &storage_();
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};
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// Built-in command installers
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void InstallDefaultCommands();
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// Dispatcher entry points for the input layer
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// Returns true if the command executed successfully.
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bool Execute(Editor &ed, CommandId id, const std::string &arg = std::string(), int count = 0);
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bool Execute(Editor &ed, const std::string &name, const std::string &arg = std::string(), int count = 0);
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#endif // KTE_COMMAND_H
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