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Finishing the implementation with the stringify and load methods in t…
…he DockingLayout class. #1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,206 @@ | ||
| import 'package:docking/src/internal/layout/layout_tokenizer.dart'; | ||
| import 'package:docking/src/layout/area_builder.dart'; | ||
| import 'package:docking/src/layout/docking_layout.dart'; | ||
| import 'package:docking/src/layout/layout_parser.dart'; | ||
| import 'package:meta/meta.dart'; | ||
|
|
||
| @internal | ||
| class LayoutFactory { | ||
| /// Builds a [DockingLayout] from formatted layout String. | ||
| static DockingArea? buildRoot( | ||
| {required String layout, | ||
| required LayoutParser parser, | ||
| required AreaBuilder builder}) { | ||
| if (layout.startsWith('V1:')) { | ||
| Tokenizer tokenizer = Tokenizer(layout.substring(3)); | ||
|
|
||
| final int areasLength = tokenizer.removeFirstRequiredInt( | ||
| stop: ':', | ||
| errorMessage: 'The number of areas could not be identified.'); | ||
|
|
||
| Map<int, _AreaConfig> areas = {}; | ||
|
|
||
| for (int areaIndex = 1; areaIndex <= areasLength; areaIndex++) { | ||
| final int indexFromLayout = tokenizer.removeFirstRequiredInt( | ||
| stop: '(', | ||
| errorMessage: 'The area index could not be identified: $areaIndex'); | ||
| if (areaIndex != indexFromLayout) { | ||
| throw StateError('Unexpected index: $indexFromLayout'); | ||
| } | ||
| final String acronym = tokenizer.removeFirstToken( | ||
| stop: ';', | ||
| errorMessage: 'The area acronym could not be identified.'); | ||
|
|
||
| final int idLength = tokenizer.removeFirstRequiredInt( | ||
| stop: ';', | ||
| errorMessage: | ||
| 'Error reading area $areaIndex. Not found: id length.'); | ||
| final String id = tokenizer.removeToken( | ||
| length: idLength, | ||
| errorMessage: 'Error reading area $areaIndex. Not found: id.'); | ||
|
|
||
| final double? weight = tokenizer.removeFirstOptionalDouble( | ||
| stop: ';', errorMessage: 'Invalid weight.'); | ||
|
|
||
| if (acronym == 'I') { | ||
| final bool maximized = tokenizer.removeFirstRequiredBool( | ||
| stop: ')', | ||
| errorMessage: | ||
| 'Error reading area $areaIndex. Not found: maximized.'); | ||
| areas[areaIndex] = | ||
| _ItemConfig(id: id, weight: weight, maximized: maximized); | ||
| } else if (acronym == 'R') { | ||
| List<int> childrenIndexes = tokenizer.removeChildrenIndexes(); | ||
| areas[areaIndex] = _RowConfig( | ||
| id: id, weight: weight, childrenIndexes: childrenIndexes); | ||
| } else if (acronym == 'C') { | ||
| List<int> childrenIndexes = tokenizer.removeChildrenIndexes(); | ||
| areas[areaIndex] = _ColumnConfig( | ||
| id: id, weight: weight, childrenIndexes: childrenIndexes); | ||
| } else if (acronym == 'T') { | ||
| final bool maximized = tokenizer.removeFirstRequiredBool( | ||
| stop: ';', errorMessage: 'Unrecognized syntax.'); | ||
| List<int> childrenIndexes = tokenizer.removeChildrenIndexes(); | ||
| areas[areaIndex] = _TabsConfig( | ||
| id: id, | ||
| weight: weight, | ||
| maximized: maximized, | ||
| childrenIndexes: childrenIndexes); | ||
| } else { | ||
| throw StateError('Invalid area acronym: $acronym'); | ||
| } | ||
|
|
||
| if (areaIndex < areasLength) { | ||
| if (tokenizer.removeNext() != ',') { | ||
| throw StateError('Unrecognized syntax. Area separator not found.'); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (tokenizer.isNotEmpty) { | ||
| throw StateError('Unrecognized syntax: ${tokenizer.layout}'); | ||
| } | ||
|
|
||
| if (areasLength == 0) { | ||
| return null; | ||
| } | ||
| final _AreaConfig rootConfig = areas.getArea(1); | ||
| return _buildArea( | ||
| parser: parser, builder: builder, parent: rootConfig, areas: areas); | ||
| } else { | ||
| if (layout.startsWith('V')) { | ||
| throw StateError('Unsupported layout version.'); | ||
| } | ||
| throw StateError('Unable to identify layout version.'); | ||
| } | ||
| } | ||
|
|
||
| static DockingArea _buildArea( | ||
| {required LayoutParser parser, | ||
| required AreaBuilder builder, | ||
| required _AreaConfig parent, | ||
| required Map<int, _AreaConfig> areas}) { | ||
| if (parent is _ItemConfig) { | ||
| return builder.buildDockingItem( | ||
| id: parser.stringToId(parent.id), | ||
| weight: parent.weight, | ||
| maximized: parent.maximized); | ||
| } else if (parent is _ParentConfig) { | ||
| List<DockingArea> children = []; | ||
| parent.childrenIndexes.forEach((childIndex) { | ||
| final _AreaConfig childConfig = areas.getArea(childIndex); | ||
| children.add(_buildArea( | ||
| parser: parser, | ||
| builder: builder, | ||
| parent: childConfig, | ||
| areas: areas)); | ||
| }); | ||
| if (parent is _RowConfig) { | ||
| return builder.buildDockingRow( | ||
| id: parser.stringToId(parent.id), | ||
| weight: parent.weight, | ||
| children: children); | ||
| } else if (parent is _ColumnConfig) { | ||
| return builder.buildDockingColumn( | ||
| id: parser.stringToId(parent.id), | ||
| weight: parent.weight, | ||
| children: children); | ||
| } | ||
| if (parent is _TabsConfig) { | ||
| List<DockingItem> items = []; | ||
| for (DockingArea area in children) { | ||
| items.add(area as DockingItem); | ||
| } | ||
| return builder.buildDockingTabs( | ||
| id: parser.stringToId(parent.id), | ||
| weight: parent.weight, | ||
| maximized: parent.maximized, | ||
| children: items); | ||
| } | ||
| } | ||
| throw StateError('Unrecognized type: ${parent.runtimeType}'); | ||
| } | ||
| } | ||
|
|
||
| class _AreaConfig { | ||
| _AreaConfig({required this.id, required this.weight}); | ||
|
|
||
| final String id; | ||
| final double? weight; | ||
| } | ||
|
|
||
| class _ParentConfig extends _AreaConfig { | ||
| _ParentConfig( | ||
| {required String id, | ||
| required double? weight, | ||
| required List<int> childrenIndexes}) | ||
| : childrenIndexes = List.unmodifiable(childrenIndexes), | ||
| super(id: id, weight: weight); | ||
|
|
||
| final List<int> childrenIndexes; | ||
| } | ||
|
|
||
| class _RowConfig extends _ParentConfig { | ||
| _RowConfig( | ||
| {required String id, | ||
| required double? weight, | ||
| required List<int> childrenIndexes}) | ||
| : super(id: id, weight: weight, childrenIndexes: childrenIndexes); | ||
| } | ||
|
|
||
| class _ColumnConfig extends _ParentConfig { | ||
| _ColumnConfig( | ||
| {required String id, | ||
| required double? weight, | ||
| required List<int> childrenIndexes}) | ||
| : super(id: id, weight: weight, childrenIndexes: childrenIndexes); | ||
| } | ||
|
|
||
| class _TabsConfig extends _ParentConfig { | ||
| _TabsConfig( | ||
| {required String id, | ||
| required double? weight, | ||
| required this.maximized, | ||
| required List<int> childrenIndexes}) | ||
| : super(id: id, weight: weight, childrenIndexes: childrenIndexes); | ||
|
|
||
| final bool maximized; | ||
| } | ||
|
|
||
| class _ItemConfig extends _AreaConfig { | ||
| final bool maximized; | ||
|
|
||
| _ItemConfig( | ||
| {required String id, required double? weight, required this.maximized}) | ||
| : super(id: id, weight: weight); | ||
| } | ||
|
|
||
| extension E on Map<int, _AreaConfig> { | ||
| _AreaConfig getArea(int index) { | ||
| _AreaConfig? config = this[index]; | ||
| if (config == null) { | ||
| throw StateError('Area index not found: $index'); | ||
| } | ||
| return config; | ||
| } | ||
| } |
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