@use '../core/tokens/m2/mat/form-field' as tokens-mat-form-field; @use '../core/tokens/token-utils'; // Mixin that includes the density styles for form fields. MDC provides their own density // styles for MDC text-field which we cannot use. MDC relies on input elements to stretch // vertically when the height is reduced as per density scale. This doesn't work for our // form field since we support custom form field controls without a fixed height. Instead, we // provide spacing that makes arbitrary controls align as specified in the Material Design // specification. In order to support density, we need to adjust the vertical spacing to be // based on the density scale. @mixin private-text-field-density-overrides() { @include token-utils.use-tokens( tokens-mat-form-field.$prefix, tokens-mat-form-field.get-token-slots()) { $height: token-utils.get-token-variable(container-height); .mat-mdc-form-field-infix { // We add a minimum height to the infix container to ensure that custom controls have the // same default vertical space as text-field inputs (with respect to the vertical padding). min-height: #{$height}; @include token-utils.create-token-slot(padding-top, filled-with-label-container-padding-top); @include token-utils.create-token-slot(padding-bottom, filled-with-label-container-padding-bottom); .mdc-text-field--outlined &, .mdc-text-field--no-label & { @include token-utils.create-token-slot(padding-top, container-vertical-padding); @include token-utils.create-token-slot(padding-bottom, container-vertical-padding); } } // By default, MDC aligns the label using percentage. This will be overwritten based // on whether a textarea is used. This is not possible in our implementation of the // form-field because we do not know what type of form-field control is set up. Hence // we always use a fixed position for the label. This does not have any implications. .mat-mdc-text-field-wrapper .mat-mdc-form-field-flex .mat-mdc-floating-label { top: calc(#{$height} / 2); } // We need to conditionally hide the floating label based on the height of the form field. .mdc-text-field--filled .mat-mdc-floating-label { display: token-utils.get-token-variable(filled-label-display, $fallback: block); } // For the outline appearance, we re-create the active floating label transform. This is // necessary because the transform for docked floating labels can be updated to account for // the width of prefix container. .mat-mdc-text-field-wrapper.mdc-text-field--outlined .mdc-notched-outline--upgraded .mdc-floating-label--float-above { // Needs to be in a string form to work around an internal check that incorrectly flags this // interpolation in `calc` as unnecessary. If we don't have it, Sass won't evaluate it. $offset: 'calc(6.75px + #{$height} / 2)'; $translate: 'calc(#{$offset} * -1)'; --mat-mdc-form-field-label-transform: translateY(#{$translate}) scale(var(--mat-mdc-form-field-floating-label-scale, 0.75)); transform: var(--mat-mdc-form-field-label-transform); } } }