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import clamp from './clamp';
import convertToCSSPTValue from './convertToCSSPTValue';
import toCSSLineSpacing from './toCSSLineSpacing';
import { Node, DOMOutputSpec } from 'prosemirror-model';
//import type { NodeSpec } from './Types';
type NodeSpec = {
attrs?: { [key: string]: any },
content?: string,
draggable?: boolean,
group?: string,
inline?: boolean,
name?: string,
parseDOM?: Array<any>,
toDOM?: (node: any) => DOMOutputSpec,
};
// This assumes that every 36pt maps to one indent level.
export const INDENT_MARGIN_PT_SIZE = 36;
export const MIN_INDENT_LEVEL = 0;
export const MAX_INDENT_LEVEL = 7;
export const ATTRIBUTE_INDENT = 'data-indent';
export const EMPTY_CSS_VALUE = new Set(['', '0%', '0pt', '0px']);
const ALIGN_PATTERN = /(left|right|center|justify)/;
// https://github.com/ProseMirror/prosemirror-schema-basic/blob/master/src/schema-basic.js
// :: NodeSpec A plain paragraph textblock. Represented in the DOM
// as a `<p>` element.
const ParagraphNodeSpec: NodeSpec = {
attrs: {
align: { default: null },
color: { default: null },
id: { default: null },
indent: { default: null },
lineSpacing: { default: null },
// TODO: Add UI to let user edit / clear padding.
paddingBottom: { default: null },
// TODO: Add UI to let user edit / clear padding.
paddingTop: { default: null },
},
content: 'inline*',
group: 'block',
parseDOM: [{ tag: 'p', getAttrs }],
toDOM,
};
function getAttrs(dom: HTMLElement): Object {
const {
lineHeight,
textAlign,
marginLeft,
paddingTop,
paddingBottom,
} = dom.style;
let align = dom.getAttribute('align') || textAlign || '';
align = ALIGN_PATTERN.test(align) ? align : "";
let indent = parseInt(dom.getAttribute(ATTRIBUTE_INDENT) || "", 10);
if (!indent && marginLeft) {
indent = convertMarginLeftToIndentValue(marginLeft);
}
indent = indent || MIN_INDENT_LEVEL;
const lineSpacing = lineHeight ? toCSSLineSpacing(lineHeight) : null;
const id = dom.getAttribute('id') || '';
return { align, indent, lineSpacing, paddingTop, paddingBottom, id };
}
function toDOM(node: Node): DOMOutputSpec {
const {
align,
indent,
lineSpacing,
paddingTop,
paddingBottom,
id,
} = node.attrs;
const attrs: { [key: string]: any } | null = {};
let style = '';
if (align && align !== 'left') {
style += `text-align: ${align};`;
}
if (lineSpacing) {
const cssLineSpacing = toCSSLineSpacing(lineSpacing);
style +=
`line-height: ${cssLineSpacing};` +
// This creates the local css variable `--czi-content-line-height`
// that its children may apply.
`--czi-content-line-height: ${cssLineSpacing}`;
}
if (paddingTop && !EMPTY_CSS_VALUE.has(paddingTop)) {
style += `padding-top: ${paddingTop};`;
}
if (paddingBottom && !EMPTY_CSS_VALUE.has(paddingBottom)) {
style += `padding-bottom: ${paddingBottom};`;
}
style && (attrs.style = style);
if (indent) {
attrs[ATTRIBUTE_INDENT] = String(indent);
}
if (id) {
attrs.id = id;
}
return ['p', attrs, 0];
}
export const toParagraphDOM = toDOM;
export const getParagraphNodeAttrs = getAttrs;
export function convertMarginLeftToIndentValue(marginLeft: string): number {
const ptValue = convertToCSSPTValue(marginLeft);
return clamp(
MIN_INDENT_LEVEL,
Math.floor(ptValue / INDENT_MARGIN_PT_SIZE),
MAX_INDENT_LEVEL
);
}
export default ParagraphNodeSpec;
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