140 lines
5.1 KiB
C++
140 lines
5.1 KiB
C++
/*************************************************************************/
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/* undo_redo.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef UNDO_REDO_H
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#define UNDO_REDO_H
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#include "core/object/class_db.h"
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#include "core/object/ref_counted.h"
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class UndoRedo : public Object {
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GDCLASS(UndoRedo, Object);
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OBJ_SAVE_TYPE(UndoRedo);
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public:
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enum MergeMode {
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MERGE_DISABLE,
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MERGE_ENDS,
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MERGE_ALL
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};
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typedef void (*CommitNotifyCallback)(void *p_ud, const String &p_name);
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Variant _add_do_method(const Variant **p_args, int p_argcount, Callable::CallError &r_error);
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Variant _add_undo_method(const Variant **p_args, int p_argcount, Callable::CallError &r_error);
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typedef void (*MethodNotifyCallback)(void *p_ud, Object *p_base, const StringName &p_name, VARIANT_ARG_DECLARE);
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typedef void (*PropertyNotifyCallback)(void *p_ud, Object *p_base, const StringName &p_property, const Variant &p_value);
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private:
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struct Operation {
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enum Type {
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TYPE_METHOD,
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TYPE_PROPERTY,
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TYPE_REFERENCE
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};
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Type type;
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Ref<RefCounted> ref;
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ObjectID object;
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StringName name;
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Variant args[VARIANT_ARG_MAX];
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};
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struct Action {
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String name;
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List<Operation> do_ops;
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List<Operation> undo_ops;
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uint64_t last_tick;
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};
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Vector<Action> actions;
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int current_action = -1;
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int action_level = 0;
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MergeMode merge_mode = MERGE_DISABLE;
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bool merging = false;
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uint64_t version = 1;
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void _pop_history_tail();
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void _process_operation_list(List<Operation>::Element *E);
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void _discard_redo();
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bool _redo(bool p_execute);
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CommitNotifyCallback callback = nullptr;
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void *callback_ud = nullptr;
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void *method_callbck_ud = nullptr;
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void *prop_callback_ud = nullptr;
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MethodNotifyCallback method_callback = nullptr;
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PropertyNotifyCallback property_callback = nullptr;
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int committing = 0;
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protected:
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static void _bind_methods();
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public:
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void create_action(const String &p_name = "", MergeMode p_mode = MERGE_DISABLE);
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void add_do_method(Object *p_object, const StringName &p_method, VARIANT_ARG_LIST);
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void add_undo_method(Object *p_object, const StringName &p_method, VARIANT_ARG_LIST);
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void add_do_property(Object *p_object, const StringName &p_property, const Variant &p_value);
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void add_undo_property(Object *p_object, const StringName &p_property, const Variant &p_value);
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void add_do_reference(Object *p_object);
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void add_undo_reference(Object *p_object);
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bool is_committing_action() const;
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void commit_action(bool p_execute = true);
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bool redo();
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bool undo();
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String get_current_action_name() const;
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int get_history_count();
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int get_current_action();
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String get_action_name(int p_id);
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void clear_history(bool p_increase_version = true);
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bool has_undo();
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bool has_redo();
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uint64_t get_version() const;
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void set_commit_notify_callback(CommitNotifyCallback p_callback, void *p_ud);
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void set_method_notify_callback(MethodNotifyCallback p_method_callback, void *p_ud);
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void set_property_notify_callback(PropertyNotifyCallback p_property_callback, void *p_ud);
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UndoRedo() {}
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~UndoRedo();
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};
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VARIANT_ENUM_CAST(UndoRedo::MergeMode);
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#endif // UNDO_REDO_H
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