DACS #

DACS brings Tailwind-inspired utility classes to Flutter. Write concise string expressions to define text styles, padding, colors, borders, shadows, transforms, gradients, and more.

Text('Hello, World!', style: 'text-2xl font-medium text-sky-500'.dText)

Features #

Zero-config — just install and use
Tailwind v3 color palette — 22 colors × 11 shades
Spacing scale — 0 to 384px in Tailwind increments
Text utilities — size, weight, color, letter spacing, line height, decoration
Background & border — colors, border width, border radius with directional variants
Sizing, shadows & opacity — width, height, box shadows, opacity
Position — inset-, top-, right-, bottom-, left-*
Transform — scale, rotate, translate, skew
Gradient — linear gradients from Tailwind color tokens
Theme colors from ColorScheme — text-primary, bg-surface, border-error
Arbitrary values — text-[#ff0000], p-[20], w-[50%], rounded-[12]
Material widget extensions — style any Material widget: .dButton(context), .dCheckbox(context), .dCard(context), etc.
WidgetState variants — hover:, focus:, disabled:, pressed:, selected:, error:, dragged:, scrolledUnder:
Chained compound variants — combine any prefixes: dark:hover:, dark:md:focus:, light:lg:disabled:
Dark/Light mode & responsive variants — dark:, light:, sm:, md:, lg:, xl:, 2xl:

Documentation #

Installation #

dependencies:
  dacs: ^0.4.0

Usage #

Configuration and compilation #

DACS works without configuration, but you can enable diagnostics for unknown utilities and tune the parser cache:

Dacs.configure(
  strictMode: false,
  cacheSize: 500,
  onUnknownUtility: (utility) {
    debugPrint('Unknown DACS utility: $utility');
  },
);

final sheet = DacsCompiler.compile('text-sm dark:md:hover:bg-red-500');

Compilation is context-free: DacsCompiler.compile only parses the string into a DacsStyleSheet. Runtime values such as BuildContext, theme colors, brightness, breakpoints, and widget states are applied later by methods such as .dTextOf(context), .dBoxOf(context), and .dButton(context).

Text styles #

Text('Heading', style: 'text-3xl font-bold text-gray-900'.dText)
Text('Body', style: 'text-base leading-relaxed text-gray-600'.dText)

Padding & Margin #

Container(
  padding: 'px-4 py-2'.dPads,
  margin: 'mt-4'.dPads,
  child: Text('Content', style: 'text-base'.dText),
)

Box decoration #

Container(
  decoration: 'bg-blue-500 rounded-lg shadow-md'.dBox,
  child: Text('Button', style: 'text-white font-medium'.dText),
)

Gradients #

Container(
  decoration: 'bg-gradient-to-r from-sky-400 to-blue-600'.dBox,
  child: Text('Gradient', style: 'text-white text-xl'.dText),
)

Shadows #

Container(decoration: 'bg-white rounded-xl shadow-lg'.dBox)
// Or just the shadow list:
final shadows = 'shadow-lg'.dShadow;

Sizing #

final (width, height) = 'w-64 h-48'.dSize;

Position (for Stack) #

final (top, right, bottom, left) = 'inset-0'.dPosition;

Transform #

Transform(
  transform: 'scale-125 rotate-45'.dTransform,
  child: Text('Styled'),
)

Dark / Light mode variants #

// Resolves automatically from MediaQuery:
Text(
  'Responsive text',
  style: 'text-gray-900 dark:text-white'.dTextOf(context),
)

Container(
  decoration: 'bg-white dark:bg-gray-900'.dBoxOf(context),
  child: Text(
    'Content',
    style: 'text-base text-gray-600 dark:text-gray-300'.dTextOf(context),
  ),
)

Responsive variants #

// Applies breakpoints based on screen width from MediaQuery:
Text(
  'Responsive heading',
  style: 'text-base sm:text-lg md:text-xl lg:text-2xl'.dTextOf(context),
)

Container(
  padding: 'p-4 md:p-8 lg:p-12'.dPadsOf(context),
  decoration: 'bg-white dark:bg-gray-900 rounded-lg'.dBoxOf(context),
  child: Text(
    'Content',
    style: 'text-sm md:text-base'.dTextOf(context),
  ),
)

Theme colors #

Use any ColorScheme key as a color — no need to import or reference the theme directly:

Text('Primary', style: 'text-primary font-bold'.dTextOf(context))
Container(decoration: 'bg-surface rounded-lg border-outline'.dBoxOf(context))
CheckboxTheme(
  data: 'checked:bg-primary unchecked:bg-surface'.dCheckbox(context),
  child: Checkbox(value: true, onChanged: (_) {}),
)

Supported keys: primary, onPrimary, primaryContainer, onPrimaryContainer, secondary, onSecondary, secondaryContainer, onSecondaryContainer, tertiary, onTertiary, tertiaryContainer, onTertiaryContainer, error, onError, errorContainer, onErrorContainer, surface, onSurface, surfaceVariant, onSurfaceVariant, outline, outlineVariant, inverseSurface, onInverseSurface, inversePrimary, shadow, scrim

Arbitrary values #

Use square brackets for one-off values:

'text-[#ff0000]'         // exact color
'bg-[rgb(255,0,0)]'      // rgb syntax
'p-[20]'                  // 20px padding
'w-[50%]'                 // 50% width
'rounded-[12]'            // 12px border radius
'opacity-[0.75]'          // 75% opacity
'scale-[200]'             // 2x scale

Material widget extensions #

Style Material widgets via context-aware methods. WidgetState variant support (hover:, focus:, disabled:, etc.) varies by adapter — see the table below.

ElevatedButton(
  style: 'bg-primary text-white rounded-lg'.dButton(context),
  onPressed: () {},
  child: const Text('Submit'),
)

CheckboxTheme(
  data: 'bg-primary hover:bg-primaryContainer'.dCheckbox(context),
  child: Checkbox(value: true, onChanged: (_) {}),
)

CardTheme(
  data: 'bg-surface rounded-xl shadow-md'.dCard(context),
  child: Card(child: Text('Content', style: 'text-base'.dText)),
)

All 27 Material widgets are supported: dButton, dCheckbox, dSwitch, dRadio, dChip, dAppBar, dCard, dListTile, dTabBar, dBottomNav, dInput, dProgress, dTooltip, dDivider, dScrollbar, dSnackBar, dDialog, dBottomSheet, dExpansionTile, dNavBar, dFab, dDataTable, dSearchBar, dMenu, dSlider, dIcon, dShape.

For the detailed per-widget property matrix, see the widget support matrix.

TextField inputs #

TextField.style and TextField.decoration are different Flutter APIs. Use .dTextOf(context) for the typed text and .dInputOf(context) for the input chrome: label, hint, helper, error, prefix/suffix, fill, density, padding, and borders.

const classes = 'text-onSurface label-[Email] hint-[you@example.com] '
    'helper-[Use your work email] filled dense bg-surface '
    'border-outline focus:border-primary error:border-error '
    'focus:error:border-primaryContainer rounded-lg p-4';

TextField(
  style: classes.dTextOf(context),
  decoration: classes.dInputOf(context),
)

WidgetState variants #

For Material widgets, use interactive state variants:

ElevatedButton(
  style: 'bg-primary hover:bg-primaryContainer disabled:bg-surface 
          rounded-lg hover:rounded-xl'.dButton(context),
  onPressed: () {},
  child: const Text('Submit'),
)

State order: base → disabled → pressed → hover → focus → selected → error → dragged → scrolledUnder. Shape variants (hover:rounded-xl, pressed:rounded-sm) resolve dynamically via _stateProp.

Chained compound variants #

Combine any variant prefixes with ::

// Applies only in dark mode AND when hovered
Text(
  'Styled text',
  style: 'text-white dark:hover:text-primary'.dTextOf(context),
)

// Triple compound: dark mode, medium breakpoint, hover
Container(
  decoration: 'bg-primary dark:md:hover:bg-error'.dBoxOf(context),
)

Parsed style access #

final sheet = 'text-lg font-bold text-red-600 dark:text-white'.dStyle;
final base = sheet.base;

print(base.fontSize);   // 18
print(base.fontWeight); // FontWeight.w700
print(base.color);      // Color(0xFFDC2626)

final resolved = sheet.resolveFor(context); // DacsResolvedStyle

Extension methods #

Simple getters (no context) #

These parse classes and convert immediately. Useful when you don't need variant resolution.

Getter	Returns
`.dText`	`TextStyle`
`.dPads`	`EdgeInsets`
`.dBox`	`BoxDecoration`
`.dStyle`	`DacsStyleSheet`
`.dBase`	`DacsStyle`
`.dShadow`	`List<BoxShadow>`
`.dSize`	`(double?, double?)`
`.dFixedSize`	`Size?`
`.dLayout`	`DacsLayoutStyle`
`.dPosition`	`(double?, double?, double?, double?)`
`.dTransform`	`Matrix4`
`.dGradient`	`LinearGradient?`
`.dBorder`	`BoxBorder?`
`.dBorderSide`	`BorderSide?`
`.dRadius`	`BorderRadiusGeometry?`
`.dConstraints`	`BoxConstraints?`
`.dAlignment`	`AlignmentGeometry?`
`.dShapeBorder`	`ShapeBorder?`

Context-aware methods (resolve variants) #

These accept a BuildContext to resolve dark/light mode, responsive breakpoints, and theme colors from MediaQuery / Theme.

Method	Returns
`.dTextOf(context)`	`TextStyle`
`.dPadsOf(context)`	`EdgeInsets`
`.dMarginOf(context)`	`EdgeInsets`
`.dBoxOf(context)`	`BoxDecoration`
`.dStyleOf(context)`	`DacsResolvedStyle`
`.dShadowOf(context)`	`List<BoxShadow>`
`.dSizeOf(context)`	`(double?, double?)`
`.dFixedSizeOf(context)`	`Size?`
`.dLayoutOf(context)`	`DacsLayoutStyle`
`.dPositionOf(context)`	`(double?, double?, double?, double?)`
`.dTransformOf(context)`	`Matrix4`
`.dGradientOf(context)`	`LinearGradient?`
`.dBorderOf(context)`	`BoxBorder?`
`.dBorderSideOf(context)`	`BorderSide?`
`.dRadiusOf(context)`	`BorderRadiusGeometry?`
`.dConstraintsOf(context)`	`BoxConstraints?`
`.dAlignmentOf(context)`	`AlignmentGeometry?`
`.dShapeBorderOf(context)`	`ShapeBorder?`

Material widget extensions #

These accept a BuildContext and return Material theme data with variant resolution. WidgetState support is marked per method. For property-level support, see the widget support matrix.

Method	Returns	WidgetState
`.dButton(context)`	`ButtonStyle`	full
`.dCheckbox(context)`	`CheckboxThemeData`	partial
`.dSwitch(context)`	`SwitchThemeData`	partial
`.dRadio(context)`	`RadioThemeData`	partial
`.dChip(context)`	`ChipThemeData`	only color
`.dScrollbar(context)`	`ScrollbarThemeData`	partial
`.dNavBar(context)`	`NavigationBarThemeData`	only label
`.dDataTable(context)`	`DataTableThemeData`	partial
`.dSearchBar(context)`	`SearchBarThemeData`	partial
`.dMenu(context)`	`MenuStyle`	partial
`.dSlider(context)`	`SliderThemeData`	partial
`.dAppBar(context)`	`AppBarTheme`	—
`.dCard(context)`	`CardTheme`	—
`.dListTile(context)`	`ListTileThemeData`	—
`.dTabBar(context)`	`TabBarTheme`	—
`.dBottomNav(context)`	`BottomNavigationBarThemeData`	—
`.dInput(context)` / `.dInputOf(context)`	`InputDecoration`	focus, disabled, error, focus:error border mappings
`.dProgress(context)`	`ProgressIndicatorThemeData`	—
`.dTooltip(context)`	`TooltipThemeData`	—
`.dDivider(context)`	`DividerThemeData`	—
`.dSnackBar(context)`	`SnackBarThemeData`	—
`.dDialog(context)`	`DialogTheme`	—
`.dBottomSheet(context)`	`BottomSheetThemeData`	—
`.dExpansionTile(context)`	`ExpansionTileThemeData`	—
`.dFab(context)`	`FloatingActionButtonThemeData`	—
`.dIcon(context)`	`IconThemeData`	—
`.dShape(context)`	`ShapeDecoration`	—

Supported classes #

Typography #

Class	Flutter property
`text-xs` … `text-9xl`	`fontSize` (12 … 128)
`font-thin` … `font-black`	`fontWeight` (100 … 900)
`leading-3` … `leading-10`	`height` (line height)
`leading-none` … `leading-loose`	`height` (relative)
`tracking-tighter` … `tracking-widest`	`letterSpacing`
`italic` / `not-italic`	`fontStyle`
`underline` / `line-through` / `no-underline`	`textDecoration`
`decoration-solid` / `double` / `dotted` / `dashed` / `wavy`	`textDecorationStyle`
`decoration-{1..}`	`textDecorationThickness`
`decoration-{color}-{shade}`	`textDecorationColor`

Colors (text, background, border, decoration) #

Format: {prefix}-{color}-{shade}

'text-sky-500'         // text color
'bg-blue-200'          // background color
'border-red-600'       // border color
'decoration-green-500' // text decoration color

Supported colors: slate, gray, zinc, neutral, stone, red, orange, amber, yellow, lime, green, emerald, teal, cyan, sky, blue, indigo, violet, purple, fuchsia, pink, rose

Shades: 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 950

Also: text-black, text-white, text-transparent

Spacing #

Class	Output
`p-4`	`EdgeInsets.all(16)`
`px-4`	`EdgeInsets.symmetric(horizontal: 16)`
`py-2`	`EdgeInsets.symmetric(vertical: 8)`
`pt-4`, `pr-4`, `pb-4`, `pl-4`	Directional padding
`m-`, `mx-`, `my-`, `mt-`, `mr-`, `mb-`, `ml-*`	Same for margin

Spacing keys: 0, px, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 72, 80, 96

Border #

Class	Output
`rounded-none`	`BorderRadius.circular(0)`
`rounded-sm`	`BorderRadius.circular(2)`
`rounded`	`BorderRadius.circular(4)`
`rounded-md` / `rounded-lg` / `rounded-xl` / `rounded-2xl` / `rounded-3xl`	6 / 8 / 12 / 16 / 24
`rounded-full`	`BorderRadius.circular(9999)`
`rounded-t-lg`, `rounded-b-sm`, `rounded-l-md`, `rounded-r-xl`	Directional
`rounded-tl-lg`, `rounded-tr-lg`, `rounded-bl-lg`, `rounded-br-lg`	Corner-specific
`border`	`Border.all(width: 1)`
`border-2` … `border-8`	`Border.all(width: size)`

Sizing & opacity #

'w-64'       // width: 256
'h-32'       // height: 128
'w-full'     // width: double.infinity
'opacity-50' // opacity: 0.5

Shadows #

Class	BoxShadows
`shadow-sm`	1 shadow (subtle)
`shadow`	2 shadows (default)
`shadow-md` / `shadow-lg` / `shadow-xl` / `shadow-2xl`	Increasing blur/spread
`shadow-inner`	Inset shadow
`shadow-none`	Empty list

Position #

Class	Properties
`inset-0`	top=0, right=0, bottom=0, left=0
`inset-x-4`	left=16, right=16
`inset-y-2`	top=8, bottom=8
`top-4`, `right-4`, `bottom-4`, `left-4`	Individual inset

Transform #

Class	Property
`scale-125`	`scaleX=1.25, scaleY=1.25`
`scale-x-150`	`scaleX=1.5`
`scale-y-75`	`scaleY=0.75`
`rotate-45`	`rotateDegrees=45`
`translate-x-4`	`translateX=16`
`translate-y-2`	`translateY=8`
`skew-x-12`	`skewX=12`
`skew-y-6`	`skewY=6`

Gradient #

'bg-gradient-to-r from-red-500 to-blue-600'
'bg-gradient-to-tl from-amber-400 via-orange-500 to-red-600'

Directions: to-r, to-l, to-t, to-b, to-tr, to-tl, to-br, to-bl

Variants #

Prefix any class with a variant to scope it:

Variant	Trigger
`dark:`	Applies when `MediaQuery.platformBrightness == Brightness.dark`
`light:`	Applies when `MediaQuery.platformBrightness == Brightness.light`
`sm:`	Applies at `min-width: 640px`
`md:`	Applies at `min-width: 768px`
`lg:`	Applies at `min-width: 1024px`
`xl:`	Applies at `min-width: 1280px`
`2xl:`	Applies at `min-width: 1536px`
`hover:`	`WidgetState.hovered`
`focus:`	`WidgetState.focused`
`active:` / `pressed:`	`WidgetState.pressed`
`disabled:`	`WidgetState.disabled`
`selected:`	`WidgetState.selected`
`error:`	`WidgetState.error`
`dragged:`	`WidgetState.dragged`
`scrolledUnder:`	`WidgetState.scrolledUnder`

Resolution order (Material contexts): base → disabled → pressed → hover → focus → selected → error → dragged → scrolledUnder.

Chained compound variants: combine multiple prefix types with :.

'dark:hover:text-white'      // dark mode + hover
'light:md:bg-primary'        // light mode + md breakpoint
'dark:lg:focus:border-error' // dark + lg + focus

Compound variants match only when ALL conditions are met. WidgetState conditions re-map to simple keys for Material widget resolution.

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Metadata

DACS #

Features #

Documentation #

Installation #

Usage #

Configuration and compilation #

Text styles #

Padding & Margin #

Box decoration #

Gradients #

Shadows #

Sizing #

Position (for Stack) #

Transform #

Dark / Light mode variants #

Responsive variants #

Theme colors #

Arbitrary values #

Material widget extensions #

TextField inputs #

WidgetState variants #

Chained compound variants #

Parsed style access #

Extension methods #

Simple getters (no context) #

Context-aware methods (resolve variants) #

Material widget extensions #

Supported classes #

Typography #

Colors (text, background, border, decoration) #

Spacing #

Border #

Sizing & opacity #

Shadows #

Position #

Transform #

Gradient #

Variants #

Additional information #

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dacs 0.4.0
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