zotero/scss/elements/_editableText.scss

@include comfortable {
	--editable-text-padding-inline: 4px;
	--editable-text-padding-block: 4px;
}

@include compact {
	--editable-text-padding-inline: 4px;
	--editable-text-padding-block: 1px;
}

editable-text {
	--min-visible-lines: 0;
	--max-visible-lines: 6;

	&[multiline] {
		--min-visible-lines: 5;
		--max-visible-lines: 20;
	}

	&[nowrap] {
		--min-visible-lines: 1;
	}

	&[tight] {
		@include comfortable {
			--editable-text-padding-inline: 4px;
			--editable-text-padding-block: 2px;
		}
		
		@include compact {
			--editable-text-padding-inline: 3px;
			--editable-text-padding-block: 1px;
		}
	}

	// Fun auto-sizing approach from CSSTricks:
	// https://css-tricks.com/the-cleanest-trick-for-autogrowing-textareas/
	
	display: grid;
	scrollbar-color: var(--color-scrollbar) var(--color-scrollbar-background);
	
	span {
		visibility: hidden;
		margin: 0;
		border: 1px solid transparent;
		width: fit-content;
		white-space: pre;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
	}
	
	&:not([nowrap])::after {
		content: attr(value) ' ';
		visibility: hidden;
		border: 1px solid transparent;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
		font: inherit;
		line-height: inherit;
		overflow: hidden;
		scrollbar-gutter: stable;
	}
	
	&:not([nowrap])::after, &:not([nowrap]) .input {
		grid-area: 1 / 1 / 2 / 2;
		overflow-wrap: anywhere;
		white-space: pre-wrap;
		max-height: calc(2ex * var(--max-visible-lines));
		// Somehow this hides scroll arrows on windows when the content is short or empty
		scrollbar-width: thin;
	}
	
	.input {
		--width-focus-border: 1px;
		--radius-focus-border: 5px;
		
		// No focus ring for read-only fields
		&:read-only {
			--width-focus-border: 0px;
		}
		@include focus-ring;
		// Necessary for consistent padding, even if it's actually an <input>
		-moz-default-appearance: textarea;
		
		min-height: calc(2ex * var(--min-visible-lines));
		margin: 0;
		border: 1px solid transparent;

		font: inherit;
		line-height: inherit;
		color: inherit;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
	
		&:read-only, &:not(:focus) {
			appearance: none;
			background: transparent;
		}
		
		&:hover:not(:read-only, :focus) {
			border-radius: 5px;
			background-color: var(--fill-quinary);
			box-shadow: 0 0 0 1px var(--fill-quinary);	
		}
		
		::placeholder {
			color: var(--fill-tertiary);
		}
	}
	
	&[multiline] {
		.input {
			min-height: 5em;
		}
	}
	&[nowrap] {
		.input:not(:focus, :hover) {
			text-overflow: ellipsis;
		}
	}
	&[hidden] {
		display: none;
	}
	textarea {
		// Per https://stackoverflow.com/a/22700700, somehow this removes an extra half-line
		// at the bottom of textarea on all platforms with non-overlay scrollbars
		overflow-x: hidden;
		
		// Match the gutters we apply to ::after
		overflow-y: scroll;
	}
}