55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
#ifndef DIFFMANAGER_H
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#define DIFFMANAGER_H
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#include "definition_global.h"
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#include <map>
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#include <vector>
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namespace paysages {
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namespace definition {
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/**
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* Manager of diffs produced by a definition tree.
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*
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* Watchers can register themselves to received these diffs.
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*/
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class DEFINITIONSHARED_EXPORT DiffManager
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{
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public:
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DiffManager(DefinitionNode *tree);
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/**
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* Add a watcher for a specific node.
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*
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* The watcher reference must remain valid through the manager lifetime.
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*/
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void addWatcher(const DefinitionNode *node, DefinitionWatcher *watcher);
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/**
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* Add a new diff of a node to the change flow.
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*/
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void addDiff(DefinitionNode *node, const DefinitionDiff *diff);
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/**
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* Undo a diff in the definition tree.
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*/
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void undo();
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/**
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* Redo a diff in the definition tree, undone by undo().
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*/
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void redo();
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private:
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DefinitionNode *tree;
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int undone;
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std::vector<const DefinitionDiff *> diffs;
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std::map<const DefinitionNode *, std::vector<DefinitionWatcher *>> watchers;
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};
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}
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}
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#endif // DIFFMANAGER_H
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