element-web-Github/res/css/views/elements/_Field.pcss

/*
Copyright 2019-2024 New Vector Ltd.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

/* TODO: Consider unifying with general input styles in _light.pcss */

.mx_Field {
    display: flex;
    flex: 1;
    min-width: 0;
    position: relative;
    margin: 1em 0;
    border-radius: 8px;
    transition: border-color 0.25s;
    border: 1px solid var(--cpd-color-border-interactive-secondary);
}

.mx_Field_prefix {
    border-right: 1px solid var(--cpd-color-border-interactive-secondary);
}

.mx_Field_postfix {
    border-left: 1px solid var(--cpd-color-border-interactive-secondary);
}

.mx_Field input,
.mx_Field select,
.mx_Field textarea {
    font: var(--cpd-font-body-md-regular);
    border: none;
    /* Even without a border here, we still need this avoid overlapping the rounded */
    /* corners on the field above. */
    border-radius: 8px;
    padding: 8px 9px;
    color: $primary-content;
    background-color: $background;
    flex: 1;
    min-width: 0;
}

.mx_Field select {
    -moz-appearance: none;
    -webkit-appearance: none;
    text-overflow: ellipsis;
}

/* Can't add pseudo-elements to a select directly, so we use its parent. */
.mx_Field_select::before {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 4px;
    width: 18px;
    height: 18px;
    mask: url("@vector-im/compound-design-tokens/icons/chevron-down.svg");
    mask-repeat: no-repeat;
    mask-position: center;
    mask-size: contain;
    background-color: $primary-content;
    z-index: 1;
    pointer-events: none;
}

.mx_Field:focus-within {
    border-color: $accent-alt;
}

.mx_Field input:focus,
.mx_Field select:focus,
.mx_Field textarea:focus {
    outline: 0;
}

.mx_Field input::placeholder,
.mx_Field textarea::placeholder {
    transition: color 0.25s ease-in 0s;
    color: transparent;
}

.mx_Field input:placeholder-shown:focus::placeholder,
.mx_Field textarea:placeholder-shown:focus::placeholder,
.mx_Field.mx_Field_placeholderIsHint input::placeholder {
    transition: color 0.25s ease-in 0.1s;
    color: $info-plinth-fg-color;
}

.mx_Field label {
    transition:
        font-size 0.25s ease-out 0.1s,
        color 0.25s ease-out 0.1s,
        transform 0.25s ease-out 0.1s,
        background-color 0.25s ease-out 0.1s;
    background-color: transparent;
    font: var(--cpd-font-body-md-regular);
    color: var(--cpd-color-text-secondary);
    transform: translateY(0);
    position: absolute;
    left: 0px;
    margin: 7px 8px;
    padding: 2px;
    pointer-events: none; /* Allow clicks to fall through to the input */
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    max-width: calc(100% - 20px); /* 100% of parent minus margin and padding */
}

.mx_Field_labelAlwaysTopLeft label,
.mx_Field select + label /* Always show a select's label on top to not collide with the value */,
.mx_Field input:focus + label,
.mx_Field input:not(:placeholder-shown) + label,
.mx_Field textarea:focus + label,
.mx_Field textarea:not(:placeholder-shown) + label {
    transition:
        font-size 0.25s ease-out 0s,
        color 0.25s ease-out 0s,
        transform 0.25s ease-out 0s,
        background-color 0.25s ease-out 0s;
    font-size: $font-10px;
    transform: translateY(-13px);
    padding: 0 2px;
    background-color: $background;
    pointer-events: initial;
}

.mx_Field input:focus + label,
.mx_Field select:focus + label,
.mx_Field textarea:focus + label {
    color: $accent-alt;
}

.mx_Field select:disabled,
.mx_Field select:disabled + label,
.mx_Field input:disabled,
.mx_Field input:disabled + label,
.mx_Field textarea:disabled,
.mx_Field textarea:disabled + label {
    background-color: $background;
    color: $info-plinth-fg-color;
}

.mx_Field_valid {
    &.mx_Field,
    &.mx_Field:focus-within {
        border-color: $accent;
    }

    &.mx_Field label,
    &.mx_Field:focus-within label {
        color: $accent;
    }
}

.mx_Field_invalid {
    &.mx_Field,
    &.mx_Field:focus-within {
        border-color: $alert;
    }

    &.mx_Field label,
    &.mx_Field:focus-within label {
        color: $alert;
    }
}

/* Customise other components when placed inside a Field */

.mx_Field .mx_Dropdown_input {
    border: initial;
    border-radius: initial;
}

.mx_Field .mx_CountryDropdown {
    width: fit-content;
}