Move client/{base, observable, layout, touch, util, view} to samples/ui_lib .

client/layout/GridLayoutParams.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.
-
-/**
- * Caches the layout parameters that were specified in CSS during a layout
- * computation. These values are immutable during a layout.
- */
-// TODO(jmesserly): I would like all fields to be final, but it's too painful
-// to do this right now in Dart. If I create a factory constructor, then I need
-// to create locals, and pass all parameters to the real constructor. Each
-// field ends up being mentioned 4 times instead of just twice.
-class GridLayoutParams extends LayoutParams {
-  /** The coordinates of this item in the grid. */
-  int row;
-  int column;
-  int rowSpan;
-  int columnSpan;
-  int layer;
-
-  /** Alignment within its box */
-  GridItemAlignment rowAlign;
-  GridItemAlignment columnAlign;
-
-  GridLayoutParams(Positionable view, GridLayout layout)
-    : super(view.node) {
-
-    // TODO(jmesserly): this can be cleaned up a lot by just passing "view"
-    // into the parsers.
-
-    rowAlign = new GridItemAlignment.fromString(
-        view.customStyle['grid-row-align']);
-    columnAlign = new GridItemAlignment.fromString(
-        view.customStyle['grid-column-align']);
-
-    layer = StringUtils.parseInt(view.customStyle['grid-layer'], 0);
-
-    rowSpan = StringUtils.parseInt(view.customStyle['grid-row-span']);
-    columnSpan = StringUtils.parseInt(view.customStyle['grid-column-span']);
-
-    var line = _GridItemParser.parse(
-        view.customStyle['grid-row'], layout.rows);
-    if (line != null) {
-      row = line.start;
-      if (line.length != null) {
-        if (rowSpan != null) {
-          throw new UnsupportedOperationException(
-            'grid-row-span cannot be with grid-row that defines an end');
-        }
-        rowSpan = line.length;
-      }
-    }
-
-    line = _GridItemParser.parse(
-        view.customStyle['grid-column'], layout.columns);
-
-    if (line != null) {
-      column = line.start;
-      if (line.length != null) {
-        if (columnSpan != null) {
-          throw new UnsupportedOperationException(
-            'grid-column-span cannot be with grid-column that defines an end');
-        }
-        columnSpan = line.length;
-      }
-    }
-
-    String cell = _GridTemplateParser.parseCell(view.customStyle['grid-cell']);
-    if (cell != null && cell != 'none') {
-      // TODO(jmesserly): I didn't see anything spec'd about conflicts and
-      // error handling. For now, throw an error on a misconfigured view.
-      // CSS is designed to be a permissive language, though, so we should do
-      // better and resolve conflicts more intelligently.
-      if (row != null || column != null ||
-          rowSpan != null || columnSpan != null) {
-        throw new UnsupportedOperationException(
-            'grid-cell cannot be used with grid-row and grid-column');
-      }
-
-      if (layout.template == null) {
-        throw new UnsupportedOperationException(
-            'grid-cell requires that grid-template is set on the parent');
-      }
-
-      final rect = layout.template.lookupCell(cell);
-      row = rect.row;
-      column = rect.column;
-      rowSpan = rect.rowSpan;
-      columnSpan = rect.columnSpan;
-
-    } else {
-      // Apply default row, column span values.
-      if (rowSpan == null) rowSpan = 1;
-      if (columnSpan == null) columnSpan = 1;
-
-      if (row == null && column == null) {
-        throw new  UnsupportedOperationException('grid-flow is not implemented'
-            + ' so at least one row or one column must be defined');
-      }
-
-      if (row == null) row = 1;
-      if (column == null) column = 1;
-    }
-
-    assert(row > 0 && rowSpan > 0 && column > 0 && columnSpan > 0);
-  }
-}