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margin.dart
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margin.dart
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/*
* Copyright (C) 2019-present The Kraken authors. All rights reserved.
*/
import 'package:flutter/rendering.dart';
import 'package:kraken/css.dart';
import 'package:kraken/rendering.dart';
mixin CSSMarginMixin on RenderStyle {
/// The amount to margin the child in each dimension.
///
/// If this is set to an [EdgeInsetsDirectional] object, then [textDirection]
/// must not be null.
@override
EdgeInsets get margin {
EdgeInsets insets = EdgeInsets.only(
left: marginLeft.computedValue,
right: marginRight.computedValue,
bottom: marginBottom.computedValue,
top: marginTop.computedValue
).resolve(TextDirection.ltr);
return insets;
}
CSSLengthValue? _marginLeft;
set marginLeft(CSSLengthValue? value) {
if (_marginLeft == value) return;
_marginLeft = value;
_markSelfAndParentNeedsLayout();
}
@override
CSSLengthValue get marginLeft => _marginLeft ?? CSSLengthValue.zero;
CSSLengthValue? _marginRight;
set marginRight(CSSLengthValue? value) {
if (_marginRight == value) return;
_marginRight = value;
_markSelfAndParentNeedsLayout();
}
@override
CSSLengthValue get marginRight => _marginRight ?? CSSLengthValue.zero;
CSSLengthValue? _marginBottom;
set marginBottom(CSSLengthValue? value) {
if (_marginBottom == value) return;
_marginBottom = value;
_markSelfAndParentNeedsLayout();
}
@override
CSSLengthValue get marginBottom => _marginBottom ?? CSSLengthValue.zero;
CSSLengthValue? _marginTop;
set marginTop(CSSLengthValue? value) {
if (_marginTop == value) return;
_marginTop = value;
_markSelfAndParentNeedsLayout();
}
@override
CSSLengthValue get marginTop => _marginTop ?? CSSLengthValue.zero;
void _markSelfAndParentNeedsLayout() {
RenderBoxModel boxModel = renderBoxModel!;
boxModel.markNeedsLayout();
// Sizing may affect parent size, mark parent as needsLayout in case
// renderBoxModel has tight constraints which will prevent parent from marking.
if (boxModel.parent is RenderBoxModel) {
(boxModel.parent as RenderBoxModel).markNeedsLayout();
}
}
void debugMarginProperties(DiagnosticPropertiesBuilder properties) {
properties.add(DiagnosticsProperty('margin', margin));
}
}