toCss method
Convert to CSS string for HTML output
Implementation
String toCss() {
if (width == double.infinity && height == double.infinity) {
return '100% 100%';
}
if (width == double.infinity) {
return '100% ${height}px';
}
if (height == double.infinity) {
return '${width}px 100%';
}
return '${width}px ${height}px';
}