Ykkrosh
835003d525
Renamed 'not' to 'negated', since 'not' is special in C++. Added some includes, etc. This was SVN commit r4665.
126 lines
2.6 KiB
C++
126 lines
2.6 KiB
C++
#include "precompiled.h"
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#include "CommandProc.h"
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#include <cassert>
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#include <algorithm>
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//////////////////////////////////////////////////////////////////////////
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template<typename T> T next(T x) { T t = x; return ++t; }
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template<typename T> void delete_fn(T* v) { delete v; }
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//////////////////////////////////////////////////////////////////////////
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using namespace AtlasMessage;
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namespace AtlasMessage {
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CommandProc& GetCommandProc()
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{
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static CommandProc commandProc;
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return commandProc;
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}
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cmdHandlers& GetCmdHandlers()
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{
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static cmdHandlers h;
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return h;
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}
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}
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CommandProc::CommandProc()
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{
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// Start the list with a NULL, so m_CurrentCommand can point at
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// something even when the command stack is empty
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m_Commands.push_back(NULL);
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m_CurrentCommand = m_Commands.begin();
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}
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CommandProc::~CommandProc()
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{
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// Make sure Destroy has been called before now (to avoid
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// problems from the destruction order of static variables)
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debug_assert(!m_Commands.size());
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}
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void CommandProc::Destroy()
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{
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std::for_each(m_Commands.begin(), m_Commands.end(), delete_fn<Command>);
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m_Commands.clear();
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}
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void CommandProc::Submit(Command* cmd)
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{
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// If some commands have been undone at the time we insert this new one,
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// delete and remove them all.
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std::for_each(next(m_CurrentCommand), m_Commands.end(), delete_fn<Command>);
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m_Commands.erase(next(m_CurrentCommand), m_Commands.end());
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assert(next(m_CurrentCommand) == m_Commands.end());
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m_CurrentCommand = m_Commands.insert(next(m_CurrentCommand), cmd);
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(*m_CurrentCommand)->Do();
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}
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void CommandProc::Undo()
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{
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if (m_CurrentCommand != m_Commands.begin())
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{
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(*m_CurrentCommand)->Undo();
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--m_CurrentCommand;
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}
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}
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void CommandProc::Redo()
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{
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if (next(m_CurrentCommand) != m_Commands.end())
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{
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++m_CurrentCommand;
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(*m_CurrentCommand)->Redo();
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}
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}
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void CommandProc::Merge()
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{
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if (m_CurrentCommand == m_Commands.begin())
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{
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debug_warn("Merge illogic: no commands");
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return;
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}
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if (next(m_CurrentCommand) != m_Commands.end())
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{
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debug_warn("Merge illogic: not at stack top");
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return;
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}
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cmdIt prev = m_CurrentCommand;
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--prev;
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if (prev == m_Commands.begin())
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{
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debug_warn("Merge illogic: only 1 command");
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return;
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}
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if ((*prev)->GetType() != (*m_CurrentCommand)->GetType())
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{
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const char* a = (*prev)->GetType();
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const char* b = (*m_CurrentCommand)->GetType();
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debug_printf("[incompatible: %s -> %s]\n", a, b);
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debug_warn("Merge illogic: incompatible command");
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return;
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}
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(*m_CurrentCommand)->Merge(*prev);
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delete *m_CurrentCommand;
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m_Commands.erase(m_CurrentCommand);
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m_CurrentCommand = prev;
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}
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