Delete proxy and total samples, which have bit-rotted.

samples/total/client/CellContents.dart

Index: samples/total/client/CellContents.dart
===================================================================
--- samples/total/client/CellContents.dart	(revision 9011)
+++ samples/total/client/CellContents.dart	(working copy)
@@ -1,278 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/**
- * Classes that hold the content of cells.
- */
-
-/**
- * Base class for cell content.
- *
- * Cells content is immutable.
- */
-class CellContent {
-  /**
-   * Create new empty cell contents.
-   */
-  CellContent() {
-  }
-
-  /**
-   * Return true if the content's value should be refreshed on every spreadsheet recalculation.
-   *
-   * The implementation in this superclass returns false.
-   */
-  bool alwaysRecalculate() => false;
-
-  /**
-   * Create a clone (new instance that is an exact copy).
-   *
-   * Subclasses must override this method to clone their specific content.
-   */
-  CellContent clone() => new CellContent();
-
-  /**
-   * Return what the user typed to produce the content.
-   */
-  String getContent() => "";
-
-  /**
-   * Return the datatype of this content, one of [Functions.NUMBER], [Functions.DATE],
-   * [Functions.TIME], [Functions.DATE_TIME], [Functions.STRING] or -1 if unknown.
-   */
-  int getDatatype() {
-    try {
-      Value value = getValue();
-      return value.datatype;
-    } catch (TotalException e) {
-      // If getValue() fails, the datatype is unknown
-      return Value.TYPE_UNKNOWN;
-    }
-  }
-
-  /**
-   * Return the Set of (row, col) references to the cells on which this content depends directly.
-   *
-   * 'null' indicates the empty set.
-   */
-  Set<CellLocation> getDependencies() => null;
-
-  /**
-   * Return the cell contents in 'RC' form, suitable for pasting into another cell.
-   */
-  String getPasteContent() => getContent();
-
-  /**
-   * Return the computed value of this content.
-   *
-   * Since general content cannot be used as a source value, the implementation in this
-   * class throws a ValueException.
-   */
-  Value getValue() {
-    throw new ValueException();
-  }
-
-  /**
-   * Invalidate this content's reference to a range of cells that will be removed.
-   *
-   * This method only does work in content that references other cells (and hence
-   * not in this base class).
-   *
-   * Return new content if this content was modified; otherwise null
-   */
-  CellContent invalidateReferences(CellLocation thisLocation, CellRange range,
-      RowCol shiftOffset) => null;
-
-  /**
-   * Return true if this cell content requires recomputation.
-   *
-   * The implementation in this superclass returns false.
-   */
-  bool isDirty() => false;
-
-  /**
-   * Return true if this cell content contains a formula.
-   *
-   * The implementation in this superclass returns false.
-   */
-  bool isFormula() => false;
-
-  /**
-   * Return true if this content may be represented by a numeric value.  The datatype is
-   * retrieved by calling [getDatatype].  All datatypes except [Functions.STRING] and
-   * [Value.TYPE_UNKNOWN] are considered numeric.
-   */
-  bool isNumeric() {
-    int datatype = getDatatype();
-    return datatype != Value.TYPE_STRING && datatype != Value.TYPE_UNKNOWN;
-  }
-
-  /**
-   * Return true if this content is a string value.The datatype is
-   * retrieved by calling [getDatatype] and if it is equal to [Functions.STRING]
-   * then [:true:] is returned, otherwise [:false:] is returned.
-   */
-  bool isString() => getDatatype() == Value.TYPE_STRING;
-
-  /**
-   * Update formula dependencies for an insertion.
-   *
-   * Content for cells that have moved are in the range.min <= cell <= range.max range, and
-   * they have been moved by offset amount.
-   *
-   * This method only does work for content that references other cells (and hence
-   * not in this base class).
-   *
-   * Return new content if the content was modified; otherwise null.
-   */
-  CellContent modifyDependenciesForShift(CellRange range, RowCol offset) => null;
-
-  /**
-   * Set the content to be dirty, so that the next call to isDirty will return true if
-   * the content supports recalculation.
-   *
-   * Content that never changes can ignore the dirty setting.
-   */
-  void setDirty() {}
-
-  /**
-   * Return a formatted HTML version of this contents.  The value is retrieved using
-   * [getValue] and the [Style] and the value's datatype are used to select the formatting
-   * method.
-   */
-  String toHtml(Style style) {
-    String result;
-
-    try {
-      Value val = getValue();
-      int datatype = val.datatype;
-      if (datatype == Value.TYPE_STRING) {
-        String value = val.asString(null);
-        String qh = HtmlUtils.quoteHtml(value);
-        result = style.formatText(qh);
-      } else {
-        // All other datatypes are represented numerically
-        // The default format is responsible for displaying values as
-        // numbers, dates, times, booleans, etc.
-        double value = val.asDouble(null);
-        String nf = style.formatNumber(datatype, value);
-        result = style.formatText(nf);
-      }
-    } catch (TotalException e) {
-      return HtmlUtils.quoteHtml(e.toString());
-    }
-
-    return result;
-  }
-}
-
-class ValueContent extends CellContent {
-  String _content;
-  Value _value;
-
-  ValueContent(this._value, this._content) : super() { }
-
-  CellContent clone() => new ValueContent(_content, _value);
-
-  String getContent() => _content;
-
-  Value getValue() => _value;
-}
-
-/**
- * Cell content that evaluates to a formula.
- *
- * Formula objects (i.e., pre-compiled formulas) may be shared by multiple cells.
- * Using RC notation internally allows for greater sharing.
- */
-// TODO:  cache compiled formulas and canonicalize formula strings
-class FormulaContent extends CellContent {
-  static final int DIRTY = 0;
-  static final int ERROR = 1;
-  static final int IN_PROGRESS = 2;
-  static final int UP_TO_DATE = 3;
-
-  FormulaException _error;
-  final StringFormula _formula;
-  CellLocation _location;
-  int _state;
-  Value _val;
-
-  FormulaContent(this._location, this._formula) : super() {
-    _state = DIRTY;
-  }
-
-  bool alwaysRecalculate() => _formula.alwaysRecalculate();
-
-  CellContent clone() => new FormulaContent(_location, _formula);
-
-  String getContent() => _formula.getFormula(false);
-
-  Set<CellLocation> getDependencies() => _formula.getDependencies();
-
-  String getPasteContent() => _formula.getFormula(true);
-
-  Value getValue() {
-    // Evaluate each cell only once per recalculate pass
-    if (_state == DIRTY) {
-      _state = IN_PROGRESS;
-      try {
-        _val = _formula.calculate();
-        _location.spreadsheet.incrementCalculated();
-      } catch (FormulaException fe) {
-        _state = ERROR;
-        _error = fe;
-        throw _error;
-      }
-      _state = UP_TO_DATE;
-    } else if (_state == IN_PROGRESS) {
-      throw new CycleException();
-    } else if (_state == ERROR) {
-      throw _error;
-    }
-    return _val;
-  }
-
-  // Invalidate this cell's reference to another cell.
-  CellContent invalidateReferences(CellLocation thisLocation, CellRange range, RowCol offset) {
-    Formula newFormula = _formula.invalidateReferences(thisLocation, range, offset);
-    if (newFormula != null) {
-      return new FormulaContent(_location, newFormula);
-    }
-
-    return null;
-  }
-
-  // Returns true if this cell is in a dirty or in progress state.
-  bool isDirty() => _state != UP_TO_DATE && _state != ERROR;
-
-  bool isFormula() => true;
-
-  CellContent modifyDependenciesForShift(CellRange range, RowCol offset) {
-    Formula newFormula = _formula.modifyDependenciesForShift(range, offset);
-    CellLocation newLocation = null;
-    if (range.isInRange(_location)) {
-      newLocation = _location + offset;
-    }
-
-    if (newLocation != null || newFormula != null) {
-      if (newLocation == null) {
-        newLocation = _location;
-      }
-      if (newFormula == null) {
-        newFormula = _formula;
-      }
-      FormulaContent result = new FormulaContent(newLocation, newFormula);
-      return result;
-    }
-
-    return null;
-  }
-
-  // Set the state of the cell to dirty and clear any previous error.
-  void setDirty() {
-    _state = DIRTY;
-    _error = null;
-  }
-}