#include "stdafx.h"

#include "common.h"

void IconEdit_UndoCommand(int WndNum){
	int i;
	BYTE *pByte;
	ICONEDIT_UNDOSTATE *pUndoState;

	pUndoState=&MdiInfo[WndNum]->MdiIconEditInfo->undo[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum];

	i=pUndoState->NowPos-1;
	if(i==-1) i=MAX_ICONEDIT_UNDONUM-1;
	if(!pUndoState->lpData[i]){
		MessageBeep(0);
		return;
	}
	pUndoState->NowPos=i;

	pByte=MdiInfo[WndNum]->MdiIconEditInfo->pIconImage[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum];
	MdiInfo[WndNum]->MdiIconEditInfo->pIconImage[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum]=
		pUndoState->lpData[i];
	pUndoState->lpData[i]=pByte;

	//選択フレームを消去
	if(MdiInfo[WndNum]->MdiIconEditInfo->SelectLevel==2){
		DeleteObject(MdiInfo[WndNum]->MdiIconEditInfo->hSelectingBmp);
		MdiInfo[WndNum]->MdiIconEditInfo->SelectLevel=0;
	}

	//再描画
	DrawIconToMemBmp(WndNum,0);
	InvalidateRect(MdiInfo[WndNum]->MdiIconEditInfo->hMain,NULL,0);

	MdiInfo[WndNum]->MdiIconEditInfo->bModify=1;

	//メニューを有効化
	ResetState_UndoMenu();
}
void IconEdit_RedoCommand(int WndNum){
	BYTE *pByte;
	ICONEDIT_UNDOSTATE *pUndoState;

	pUndoState=&MdiInfo[WndNum]->MdiIconEditInfo->undo[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum];

	if(!pUndoState->lpData[pUndoState->NowPos]){
		MessageBeep(0);
		return;
	}

	pByte=MdiInfo[WndNum]->MdiIconEditInfo->pIconImage[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum];
	MdiInfo[WndNum]->MdiIconEditInfo->pIconImage[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum]=
		pUndoState->lpData[pUndoState->NowPos];
	pUndoState->lpData[pUndoState->NowPos]=pByte;

	DrawIconToMemBmp(WndNum,0);
	InvalidateRect(MdiInfo[WndNum]->MdiIconEditInfo->hMain,NULL,0);

	pUndoState->NowPos++;
	if(pUndoState->NowPos==MAX_ICONEDIT_UNDONUM) pUndoState->NowPos=0;

	MdiInfo[WndNum]->MdiIconEditInfo->bModify=1;

	ResetState_UndoMenu();
}
void IconEdit_NoticeChanging(int WndNum){
	extern HANDLE hHeap;
	int i;
	ICONEDIT_UNDOSTATE *pUndoState;

	pUndoState=&MdiInfo[WndNum]->MdiIconEditInfo->undo[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum];

	//Redoされた場合の不要なデータを削除する
	for(i=pUndoState->NowPos;;i++){
		if(i==MAX_ICONEDIT_UNDONUM) i=0;
		if(pUndoState->lpData[i]==0) break;
		HeapDefaultFree(pUndoState->lpData[i]);
		pUndoState->lpData[i]=0;
	}

	pUndoState->lpData[pUndoState->NowPos]=(BYTE *)
		HeapAlloc(hHeap,0,MdiInfo[WndNum]->MdiIconEditInfo->dwBytesInRes[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum]);

	memcpy(pUndoState->lpData[pUndoState->NowPos],
		MdiInfo[WndNum]->MdiIconEditInfo->pIconImage[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum],
		MdiInfo[WndNum]->MdiIconEditInfo->dwBytesInRes[MdiInfo[WndNum]->MdiIconEditInfo->SelectIconNum]);

	pUndoState->NowPos++;
	if(pUndoState->NowPos==MAX_ICONEDIT_UNDONUM) pUndoState->NowPos=0;
	if(pUndoState->lpData[pUndoState->NowPos]){
		//一番古い情報を切り捨てる
		HeapDefaultFree(pUndoState->lpData[pUndoState->NowPos]);
		pUndoState->lpData[pUndoState->NowPos]=0;
	}

	MdiInfo[WndNum]->MdiIconEditInfo->bModify=1;

	ResetState_UndoMenu();
}