基于JavaScript的公式解释器 - 14 【单元格对象】

Cell单元格对象

文件：Cell.js

// JScript source code var $MIN_ROW = 1, $MAX_ROW = 65535, $MIN_COL = 1, $MAX_COL = 256, $COL_STEP = 26; // -------------- Cell --------------- function Cell(addrStr, absoluteAddr) { this.set_ClassName("Cell"); this._row = 1; this._col1 = 0; this._col2 = 1; this._content = null; this._absoluteCol = false; this._absoluteRow = false; if (arguments.length > 0) { switch ($T(addrStr)) { case "Cell": // copy { this.set_Row(addrStr.get_Row()); this.set_Col(addrStr.get_Col()); this.set_Content(addrStr.get_Content()); this.set_AbsoluteCol(addrStr.get_AbsoluteCol()); this.set_AbsoluteRow(addrStr.get_AbsoluteRow()); } break; case "string": // Assignment { this.FromAddress(addrStr); if (arguments.length > 0) this._absoluteAddress = absoluteAddr == true; } break; } // switch } // if arguments }; Cell.prototype = { // Property: Content get_Content: function() { return this._content; }, set_Content: function(val) { this._content = val; }, // Property: Row get_Row: function() { return this._row; }, set_Row: function(val) { if (arguments.length == 0) throw new Exception(this, "set_Row", "Need an argument"); switch ($T(val)) { case "number": { this._row = val.toFixed(); } break; case "string": { var match = //$(/d+)/.exec(val); if (match != null) { this.set_AbsoluteRow(true); } else { match = /(/d+)/.exec(val); if (match != null) this.set_AbsoluteRow(false); } // if ... else match $123 if (match == null) throw new Exception(this, "set_Row", "Wrong address type:" + val); this._row = parseInt(match[1]); } break; default: throw new Exception(this, "set_Row", "Unsupported argument type:" + $T(val)); } // switch }, // Property: Col get_Col: function() { return this._col1 * $COL_STEP + this._col2; }, set_Col: function(val) { if (arguments.length == 0) throw new Exception(this, "set_Col", "Need an argument"); switch ($T(val)) { case "number": { this._col1 = (val / $COL_STEP).toFixed(); this._col2 = (val - ($COL_STEP * this._col1)).toFixed(); } break; case "string": { var col1 = 0, col2 = 0; var match = //$([a-z]{1, 2})/i.exec(val); if (match != null) { this.set_AbsoluteCol(true); } else { match = /([a-z]{1,2})/i.exec(val); if (match != null) this.set_AbsoluteCol(false); } // if ... else match if (match == null) throw new Exception(this, "set_Col", "Invalid address:" + val); this.set_AbsoluteCol(false); // absolute switch (match[1].length) { case 1: { col2 = $Ord(match[1].charAt(0)) - $Ord('A') + $MIN_COL; } break; case 2: { col1 = $Ord(match[1].charAt(0)) - $Ord('A') + $MIN_COL; col2 = $Ord(match[1].charAt(1)) - $Ord('A') + $MIN_COL; } break; default: throw new Exception(this, "FromAddress", "Invalid address:" + val); } // switch var col = col1 * $COL_STEP + col2; if (col < $MIN_COL || col > $MAX_COL) throw new Exception(this, "set_Col", "Column overrange"); this._absoluteAddress = absAddr; this._col1 = col1; this._col2 = col2; } break; default: throw new Exception(this, "set_Col", "Invalid format:" + val); } // switch }, // Property: Absolute Col/row get_AbsoluteCol: function() { return this._absoluteCol; }, set_AbsoluteCol: function(val) { this._absoluteCol = val; }, get_AbsoluteRow: function() { return this._absoluteRow; }, set_AbsoluteRow: function(val) { this._absoluteRow = val; }, // Property: IsValid IsValid: function() { return this._row >= $MIN_ROW && this._row <= $MAX_ROW && this._col >= $MIN_COL && this._col <= $MAX_COL; }, // Function: ToString // Return the formatted string address ToString: function() { return this.ToAddress(); }, // Function: ToAddress() // Return the formated cell address. ToAddress: function() { var col = (this.get_AbsoluteCol() ? "$" : "") + $Chr($ALPHABET, this._col2 - $MIN_COL); ; if (this._col1 > 0) { col = (this.get_AbsoluteCol() ? "$" : "") + $Chr($ALPHABET, this._col1 - $MIN_COL) + col; } return col + (this.get_AbsoluteRow() ? "$" : "") + this.get_Row().toString(); }, // function ToAddress // Function: FromAddress(addr) // Convert an address string to row/col position. FromAddress: function(addrStr) { if (arguments.length == 0) throw new Exception(this, "FromAddress", "Need arguments"); var row = 0, col1 = 0, col2 = 0; var match = //$([a-z]{1,2})/$(/d+)/i.exec(addrStr); if (match != null) { this.set_AbsoluteCol(true); this.set_AbsoluteRow(true); } else { match = //$([a-z]{1,2})(/d+)/i.exec(addrStr); if (match != null) { this.set_AbsoluteCol(true); this.set_AbsoluteRow(false); } else { match = /([a-z]{1,2})/$(/d+)/i.exec(addrStr); if (match != null) { this.set_AbsoluteCol(false); this.set_AbsoluteRow(false); } else { match = /([a-z]{1,2})(/d+)/i.exec(addrStr); if (match != null) { this.set_AbsoluteCol(false); this.set_AbsoluteRow(false); } // if ... else match 4: AB123 } // if ... else match 3: AB$123 } // if ... else match 2: $AB123 } // if ... else match: $AB$123 if (match == null) throw new Exception(this, "FromAddress", "Invalid address:" + addrStr); // absolute switch (match[1].length) { case 1: { col2 = $Ord(match[1].charAt(0)) - $Ord('A') + $MIN_COL; } break; case 2: { col1 = $Ord(match[1].charAt(0)) - $Ord('A') + $MIN_COL; col2 = $Ord(match[1].charAt(1)) - $Ord('A') + $MIN_COL; } break; default: throw new Exception(this, "FromAddress", "Invalid address:" + addrStr); } // switch row = parseInt(match[2]); var col = col1 * $COL_STEP + col2; if (col < $MIN_COL || col > $MAX_COL || row < $MIN_ROW || row > $MAX_ROW) throw new Exception(this, "FromAddress", "Address over range:" + addrStr); this._col1 = col1; this._col2 = col2; this._row = row; }, // function FromAddress // ------------------------ Test ------------------------ Test: function() { var str = [ "Ax12", "A0", "A1", "A5", "A9", "A999", "Z0", "Z1", "Z5", "Z9", "Z999", "ZZ0", "ZZ9", "ZZ5", "AZ0", "AZ1", "AZ9", "AZ999", "ZA0", "ZA1", "ZA9", "ZA999", "$A$1", "$A$B$255", "$A1" ]; var cell = new Cell(); for (var v in str) { if ($T(str[v]) == "function") continue; try { cell.FromAddress(str[v]); $Debug.WriteLine(str[v] + "=" + cell.ToAddress()); } catch (e) { $Debug.WriteLine("Invalid address:" + str[v] + "/nException:" + e.description); } // try ... catch } // for } // Test }; // prototype

注意，Cell._content对象未使用，留待有用之人来完成吧。