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SPL(Structured Process Language) A programming language specially for structured data computing.

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package com.scudata.cellset;

import com.scudata.common.CellLocation;
import com.scudata.common.Sentence;
import com.scudata.dm.KeyWord;

public final class CellRefUtil {
	// ????ĵ?Ԫ?????ñ?ʶ
	public static final String ERRORREF = "#REF!";

	/**
	 * ?ж??ַ??Ƿ????з???
	 * @param c ?ַ?
	 * @return true???ǣ?false??????
	 */
	public static boolean isRowChar(char c) {
		return c >= '0' && c <= '9';
	}

	/**
	 * ?ж??ַ??Ƿ????з???
	 * @param c ?ַ?
	 * @return true???ǣ?false??????
	 */
	public static boolean isColChar(char c) {
		return c >= 'A' && c <= 'Z';
	}

	/**
	 * ?ж??ַ???ָ??λ?õ?ǰһ???ַ??Ƿ???'.'
	 * @param str ????ʽ?ַ???
	 * @param pos λ??
	 * @return true???ǣ?false??????
	 */
	public static boolean isPrevDot(String str, int pos) {
		for (pos = pos - 1; pos >= 0; --pos) {
			char c = str.charAt(pos);
			if (c == '.') return true;
			if (!Character.isWhitespace(c)) return false;
		}

		return false;
	}

	/**
	 * ?ı??????õĵ?Ԫ????к?
	 * @param cellRow Դ?к?
	 * @param rowBase ?ڴ??н??????ӻ???ɾ????
	 * @param rowIncrement ???ӻ???ɾ????????
	 * @param oldRowCount ԭ??????????
	 * @return ?任?????????????null??ʾ???ø?ɾ??
	 */
	public static String changeRow(int cellRow, int rowBase, int rowIncrement, int oldRowCount) {
		if (rowBase != -1) {
			if (rowIncrement < 0) {
				//?????б?ɾ???????????ʽ
				if (cellRow >= rowBase && cellRow <= (rowBase - rowIncrement - 1)) {
					return null;
				}
			}

			if (cellRow >= rowBase) {
				cellRow += rowIncrement;
			}
		}
		return CellLocation.toRow(cellRow);
	}

	/**
	 * ?ı??????õĵ?Ԫ????к?
	 * @param cellCol Դ?к?
	 * @param colBase ?ڴ??н??????ӻ???ɾ????
	 * @param colIncrement ???ӻ???ɾ????????
	 * @param oldColCount ԭ??????????
	 * @return ?任?????????????null??ʾ???ø?ɾ??
	 */
	public static String changeCol(int cellCol, int colBase, int colIncrement, int oldColCount) {
		if (colBase != -1) {
			if (colIncrement < 0) {
				//?????б?ɾ???????????ʽ
				if (cellCol >= colBase && cellCol <= (colBase - colIncrement - 1)) {
					return null;
				}
			}

			if (cellCol >= colBase) {
				cellCol += colIncrement;
			}
		}
		return CellLocation.toCol(cellCol);
	}

	/**
	 * ?ı??????õĵ?Ԫ????кţ????ڴ?һ?????Ʊ???ʽ????һ???񣬱???ʽ?????õĸ?Ҫ????Դ??Ŀ???????λ??
	 * @param cellRow Դ?к?
	 * @param rowIncrement ???ӵ??????????ı?ʾɾ????????
	 * @param rowCount ??????
	 * @return ?任?????????????null??ʾ?????
	 */
	public static String changeRow(int cellRow, int rowIncrement, int rowCount) {
		cellRow += rowIncrement;
		if (cellRow <= 0 || cellRow > rowCount) return null;

		return CellLocation.toRow(cellRow);
	}

	/**
	 * ?ı??????õĵ?Ԫ????кţ????ڴ?һ?????Ʊ???ʽ????һ???񣬱???ʽ?????õĸ?Ҫ????Դ??Ŀ???????λ??
	 * @param cellCol Դ?к?
	 * @param colIncrement ???ӵ??????????ı?ʾɾ????????
	 * @param colCount ??????
	 * @return ?任?????????????null??ʾ?????
	 */
	public static String changeCol(int cellCol, int colIncrement, int colCount) {
		if (cellCol <= 0 || cellCol > colCount) return null;

		cellCol += colIncrement;
		if (cellCol <= 0 || cellCol > colCount) return null;

		return CellLocation.toCol(cellCol);
	}

	/**
	 * ???롢ɾ??????ʱ?Ա???ʽ?еĵ?Ԫ?????ý??б?Ǩ
	 * @param str ????ʽ
	 * @param rowBase ???????ڵ???
	 * @param rowIncrement ???????ɾ????????
	 * @param colBase ???????ڵ???
	 * @param colIncrement ???????ɾ????????
	 * @param oldRowCount ԭ??????????
	 * @param oldColCount ԭ??????????
	 * @param error ??????õĵ?Ԫ??ɾ??????error[0]Ϊtrue
	 * @return ??Ǩ??ı???ʽ
	 */
	public static String relativeRegulateString(String str, int rowBase, int rowIncrement,
										  int colBase, int colIncrement,
										  int oldRowCount, int oldColCount, boolean []error) {
		error[0] = false;
		if (str == null || str.length() == 0 || str.startsWith(ERRORREF)) {
			//????????ĵ?Ԫ?񲻴???
			return str;
		}

		StringBuffer strNew = null;
		int len = str.length();
		for (int idx = 0; idx < len; ) {
			char ch = str.charAt(idx);
			if (ch == '\'' || ch == '\"') { // ?????ַ???
				int tmp = Sentence.scanQuotation(str, idx);
				if (tmp < 0) {
					if (strNew != null) strNew.append(str.substring(idx));
					break;
				} else {
					tmp++;
					if (strNew != null) strNew.append(str.substring(idx, tmp));
					idx = tmp;
				}
			} else if (KeyWord.isSymbol(ch) || ch == KeyWord.CELLPREFIX) {
				if (strNew != null) strNew.append(ch);
				idx++;
			} else {
				int last = KeyWord.scanId(str, idx + 1);
				if (last - idx < 2 || (!isColChar(ch) && ch != '$') || isPrevDot(str, idx)) {
					if (strNew != null) strNew.append(str.substring(idx, last));
					idx = last;
					continue;
				}

				int macroIndex = -1; // A$23??$??????
				int numIndex = -1; // ???ֵ?????
				
				for (int i = idx + 1; i < last; ++i) {
					char tmp = str.charAt(i);
					if (tmp == '$') {
						macroIndex = i;
						numIndex = i + 1;
						break;
					} else if (isRowChar(tmp)) {
						numIndex = i;
						break;
					} else if (!isColChar(tmp)) {
						break;
					}
				}

				if (numIndex == -1) {
					if (strNew != null) strNew.append(str.substring(idx, last));
					idx = last;
					continue;
				}

				if (ch == '$') {
					if (macroIndex == -1) { // $A2
						CellLocation lct = CellLocation.parse(str.substring(idx + 1, last));
						if (lct == null || lct.getRow() > oldRowCount || lct.getCol() > oldColCount) {
							if (strNew != null) strNew.append(str.substring(idx, last));
						} else {
							String strCol = changeCol(lct.getCol(), colBase,
								colIncrement, oldColCount);
							if (strCol == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							String strRow = changeRow(lct.getRow(), rowBase,
								rowIncrement, oldRowCount);
							if (strRow == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(strCol);
							strNew.append(strRow);
						}
					} else { // $A$2
						int col = CellLocation.parseCol(str.substring(idx + 1, macroIndex));
						int row = CellLocation.parseRow(str.substring(numIndex, last));
						if (col == -1 || row == -1 || row > oldRowCount || col > oldColCount) {
							if (strNew != null) strNew.append(str.substring(idx, last));
						} else {
							String strCol = changeCol(col, colBase, colIncrement, oldColCount);
							if (strCol == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							String strRow = changeRow(row, rowBase, rowIncrement, oldRowCount);
							if (strRow == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(strCol);
							strNew.append('$');
							strNew.append(strRow);
						}
					}
				} else {
					if (macroIndex == -1) { // A2
						CellLocation lct = CellLocation.parse(str.substring(idx, last));
						if (lct == null || lct.getRow() > oldRowCount || lct.getCol() > oldColCount) {
							if (strNew != null) strNew.append(str.substring(idx, last));
						} else {
							String strCol = changeCol(lct.getCol(), colBase,
								colIncrement, oldColCount);
							if (strCol == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							String strRow = changeRow(lct.getRow(), rowBase,
								rowIncrement, oldRowCount);
							if (strRow == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(strCol);
							strNew.append(strRow);
						}
					} else { // A$2  A$2@cs
						int col = CellLocation.parseCol(str.substring(idx, macroIndex));
						int row = CellLocation.parseRow(str.substring(numIndex, last));
						if (col == -1 || row == -1 || row > oldRowCount || col > oldColCount) {
							if (strNew != null) strNew.append(str.substring(idx, last));
						} else {
							String strCol = changeCol(col, colBase, colIncrement, oldColCount);
							if (strCol == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							String strRow = changeRow(row, rowBase, rowIncrement, oldRowCount);
							if (strRow == null) {
								error[0] = true;
								return ERRORREF + str;
							}

							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(strCol);
							strNew.append('$');
							strNew.append(strRow);
						}
					}
				}

				idx = last;
			}
		}

		return strNew == null ? str : strNew.toString();
	}

	/**
	 * ??ɾ??ʱ??????Ԫ??????
	 * @param r ??Ԫ????к?
	 * @param rows ?????ɾ?????к?
	 * @param isInsert true?????룬false??ɾ??
	 * @return ????????кţ?????-1??ʾ???õ??б?ɾ??
	 */
	public static int adjustRowReference(int r, int []rows, boolean isInsert) {
		int count = rows.length;
		for (int i = 0; i < count; ++i) {
			if (rows[i] > r) {
				return isInsert ? r + i : r - i;
			} else if (rows[i] == r) {
				return isInsert ? r + i + 1 : -1;
			}
		}

		return isInsert ? r + count : r - count;
	}

	/**
	 * ?ѱ???ʽ?ж?lct1?????ø?Ϊlct2?????ڰ?һ??????е???һ???񣬸ı??Դ??????õ?Ŀ???
	 * @param str ????ʽ
	 * @param lct1 ԭ?????õĵ?Ԫ??
	 * @param lct2 Ŀ?굥Ԫ??
	 * @return ?任??ı???ʽ
	 */
	public static String exchangeCellString(String str, CellLocation lct1, CellLocation lct2) {
		//????????ĵ?Ԫ?񲻴???
		if (str == null || str.length() == 0 || str.startsWith(ERRORREF)) {
			return str;
		}

		StringBuffer strNew = null;
		int len = str.length();
		for (int idx = 0; idx < len; ) {
			char ch = str.charAt(idx);
			if (ch == '\'' || ch == '\"') { // ?????ַ???
				int tmp = Sentence.scanQuotation(str, idx);
				if (tmp < 0) {
					if (strNew != null) strNew.append(str.substring(idx));
					break;
				} else {
					tmp++;
					if (strNew != null) strNew.append(str.substring(idx, tmp));
					idx = tmp;
				}
			} else if (KeyWord.isSymbol(ch) || ch == KeyWord.CELLPREFIX) {
				if (strNew != null) strNew.append(ch);
				idx++;
			} else {
				int last = KeyWord.scanId(str, idx + 1);
				if (last - idx < 2 || (!isColChar(ch) && ch != '$') || isPrevDot(str, idx)) {
					if (strNew != null) strNew.append(str.substring(idx, last));
					idx = last;
					continue;
				}

				int macroIndex = -1; // A$23??$??????
				int numIndex = -1; // ???ֵ?????

				for (int i = idx + 1; i < last; ++i) {
					char tmp = str.charAt(i);
					if (tmp == '$') {
						macroIndex = i;
						numIndex = i + 1;
						break;
					} else if (isRowChar(tmp)) {
						numIndex = i;
						break;
					} else if (!isColChar(tmp)) {
						break;
					}
				}

				if (numIndex == -1) {
					if (strNew != null) strNew.append(str.substring(idx, last));
					idx = last;
					continue;
				}

				if (ch == '$') {
					if (macroIndex == -1) { // $A2
						CellLocation lct = CellLocation.parse(str.substring(idx + 1, last));

						if (lct1.equals(lct)) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(lct2.toString());
						} else if (lct2.equals(lct)) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(lct1.toString());
						} else {
							if (strNew != null) strNew.append(str.substring(idx, last));
						}
					} else { // $A$2
						int col = CellLocation.parseCol(str.substring(idx + 1, macroIndex));
						int row = CellLocation.parseRow(str.substring(numIndex, last));

						if (col == lct1.getCol() && row == lct1.getRow()) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(CellLocation.toCol(lct2.getCol()));
							strNew.append('$');
							strNew.append(CellLocation.toRow(lct2.getRow()));
						} else if (col == lct2.getCol() && row == lct2.getRow()) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append('$');
							strNew.append(CellLocation.toCol(lct1.getCol()));
							strNew.append('$');
							strNew.append(CellLocation.toRow(lct1.getRow()));
						} else {
							if (strNew != null) strNew.append(str.substring(idx, last));
						}
					}
				} else {
					if (macroIndex == -1) { // A2
						CellLocation lct = CellLocation.parse(str.substring(idx, last));
						if (lct1.equals(lct)) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(lct2.toString());
						} else if (lct2.equals(lct)) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(lct1.toString());
						} else {
							if (strNew != null) strNew.append(str.substring(idx, last));
						}
					} else { // A$2
						int col = CellLocation.parseCol(str.substring(idx, macroIndex));
						int row = CellLocation.parseRow(str.substring(numIndex, last));
						if (col == lct1.getCol() && row == lct1.getRow()) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(CellLocation.toCol(lct2.getCol()));
							strNew.append('$');
							strNew.append(CellLocation.toRow(lct2.getRow()));
						} else if (col == lct2.getCol() && row == lct2.getRow()) {
							if (strNew == null) {
								strNew = new StringBuffer(64);
								strNew.append(str.substring(0, idx));
							}

							strNew.append(CellLocation.toCol(lct1.getCol()));
							strNew.append('$');
							strNew.append(CellLocation.toRow(lct1.getRow()));
						} else {
							if (strNew != null) strNew.append(str.substring(idx, last));
						}
					}
				}

				idx = last;
			}
		}

		return strNew == null ? str : strNew.toString();
	}
}




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