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

samples/total/client/Cell.dart

-// 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.
-
-/**
- * A Cell holds all the information for a single spreadsheet cell location.
- *
- * A cell has contents and style, and tracks cells that depend on this cell (dependents).
- */
-class Cell {
-  CellContent _content;
-  Set<CellLocation> _dependents;
-  bool _isStyleDirty;
-  Style _style;
-
-  CellContent get content() => _content;
-
-  /**
-   * Return the Set of (row, col) references to the cells that depend on this cell directly.
-   *
-   * 'null' indicates the empty set.
-   */
-  Set<CellLocation> get dependents() => _dependents;
-
-  Style get style() => _style;
-
-  Cell() {
-    _style = new Style();
-  }
-
-  Cell.content(CellContent this._content) {
-    // Default style
-    _style = new Style();
-  }
-
-  Cell.contentAndStyle(CellContent this._content, Style this._style) {
-    if (_style == null) {
-      throw new RuntimeException("style == null");
-    }
-  }
-
-  Cell.style(Style this._style) {
-    if (_style == null) {
-      throw new RuntimeException("style == null");
-    }
-    _isStyleDirty = true;
-    // Leave content null
-  }
-
-  bool operator==(Cell o) {
-    if (o is !Cell) {
-      return false;
-    }
-    Cell other = o;
-    return _content == other._content && _style == other._style;
-  }
-
-  /**
-   * Add a single dependent.
-   */
-  void addDependent(CellLocation location) {
-    if (_dependents == null) {
-      _dependents = new Set<CellLocation>();
-    }
-    _dependents.add(location);
-  }
-
-  /**
-   * Add a set of dependents (cells that rely on this cell for values).
-   */
-  void addDependents(Set<CellLocation> locations) {
-    if (locations == null || locations.isEmpty()) {
-      return;
-    }
-    if (_dependents == null) {
-      _dependents = new Set<CellLocation>();
-    }
-    _dependents.addAll(locations);
-  }
-
-  /**
-   * Return true if the cell's value should be refreshed on every spreadsheet recalculation.
-   */
-  bool alwaysRecalculate() => _content == null ? false : _content.alwaysRecalculate();
-
-  /**
-   * Clear the set of dependents.
-   */
-  void clearDependents() {
-    _dependents = null;
-  }
-
-  /**
-   * Clear the dirty style flag.
-   *
-   * Call this when you have used the style information to update the display and will not need
-   * to update it again until the style for the cell changes.
-   */
-  void clearStyleDirty() {
-    _isStyleDirty = false;
-  }
-
-  // Return the content as a string
-  String getContentString() => _content == null ? "" : _content.getContent();
-
-  /**
-   * Return the datatype of this cell, one of [Value.TYPE_BOOLEAN], [Value.TYPE_DOUBLE],
-   * [Value.TYPE_DATE_TIME], [Value.TYPE_DOUBLE], [Value.TYPE_STRING], or [Value.TYPE_TIME],
-   * or [Value.TYPE_UNKNOWN] if unknown.
-   */
-  int getDatatype() => _content == null ? Value.TYPE_UNKNOWN : _content.getDatatype();
-
-  /**
-   * Return a displayable version of the datatype associated with this cell.
-   */
-  String getDatatypeAsString() => Value.getDatatypeAsString(getDatatype());
-
-  /**
-   * Return the Set of (row, col) references to the cells on which this cell depends directly.
-   *
-   * 'null' indicates the empty set.
-   */
-  Set<CellLocation> getDependencies() => _content == null ? null : _content.getDependencies();
-
-  double getDoubleValue() => getValue().asDouble(null);
-
-  // Return the cell contents in 'RC' form, suitable for pasting into another cell.
-  String getPasteContent() => _content == null ? "" : _content.getPasteContent();
-
-  String getStringValue() => getValue().asString(null);
-
-  /**
-   * Return a displayable HTML version of the Style associated with this cell.
-   */
-  String getStyleAsHtml() => _style.toHtml();
-
-  /**
-   * Return what the user typed to produce the cell.
-   */
-  String getUserContent() => _content == null ? "" : _content.getContent();
-
-  /**
-   * Return the computed value of this cell, or throw a ValueException if there is
-   * no way to compute a value.
-   */
-  Value getValue() {
-    if (_content == null) {
-      throw new ValueException();
-    }
-    CellContent cc = _content;
-    return cc.getValue();
-  }
-
-  /**
-   * Invalidate this cell's reference to a range of cells that will be removed.
-   *
-   * See [CellContents].
-   *
-   * Return the old content if the content has changed; otherwise null.
-   */
-  CellContent invalidateReferences(CellLocation thisLocation, CellRange range, RowCol shiftOffset) {
-    if (_content == null) {
-      return null;
-    }
-
-    CellContent originalContent = _content;
-    CellContent newContent = _content.invalidateReferences(thisLocation, range, shiftOffset);
-    if (newContent != null) {
-      _content = newContent;
-      return originalContent;
-    }
-
-    return null;
-  }
-
-  /**
-   * Return true if this cell requires recomputation.
-   */
-  bool isDirty() => _isStyleDirty || (_content == null ? false : _content.isDirty());
-
-  /**
-   * A cell with [:null:] content is considered empty for the purposes of the "COUNTA" function.
-   */
-  bool isEmpty() => _content == null;
-
-  /**
-   * Return true if this cell contains a formula.
-   */
-  bool isFormula() => _content == null ? false : _content.isFormula();
-
-  /**
-   * Return true if this cell contains a numeric value.
-   */
-  bool isNumeric() => _content == null ? false : _content.isNumeric();
-
-  /**
-   * Return true if this cell contains a String value.
-   */
-  bool isString() => _content == null ? false : _content.isString();
-
-  /**
-   * Return true if the Style associated with this cell is the default style.
-   */
-  bool isStyleDefault() => _style.isDefault();
-
-  /**
-   * Update formula dependencies for an insertion.
-   *
-   * See [CellContents].
-   *
-   * Return the old content if the content has changed; otherwise null.
-   */
-  CellContent modifyDependenciesForShift(CellRange range, RowCol offset) {
-    if (_content == null) {
-      return null;
-    }
-
-    CellContent originalContent = _content;
-    CellContent newContent = _content.modifyDependenciesForShift(range, offset);
-    if (newContent != null) {
-      _content = newContent;
-      return originalContent;
-    }
-
-    return null;
-  }
-
-  /**
-   * Remove a single dependent.
-   */
-  void removeDependent(CellLocation location) {
-    if (_dependents == null) {
-      return;
-    }
-    _dependents.remove(location);
-    if (_dependents.isEmpty()) {
-      _dependents = null;
-    }
-  }
-
-  /**
-   * Set the content associated with this cell.
-   *
-   * Returns the former content associated with the cell.
-   */
-  CellContent setContent(CellContent newContent) {
-    CellContent originalContent = _content;
-    _content = newContent;
-    return originalContent;
-  }
-
-  /**
-   * Mark this cell as dirty for the purposes of spreadsheet recalculation.
-   *
-   * For cells that don't perform computation, this has no effect.
-   */
-  void setContentDirty() {
-    if (_content != null) {
-      _content.setDirty();
-    }
-  }
-
-  /**
-   * Set the style associated with this cell.
-   *
-   * Returns the former style associated with the cell.
-   */
-  Style setStyle(Style newStyle) {
-    Style originalStyle = _style;
-    if (newStyle == null) {
-      _style = new Style();
-    } else {
-      _style = newStyle;
-    }
-    _isStyleDirty = true;
-    return originalStyle;
-  }
-
-  /**
-   * Return a formatted HTML version of the content of this cell.
-   */
-  String toHtml() => _content == null ? "" : _content.toHtml(_style);
-}