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import { findWrapping, ReplaceAroundStep, canSplit, liftTarget, canJoin } from 'prosemirror-transform';
import { NodeRange, Fragment, Slice } from 'prosemirror-model';
import { Selection } from 'prosemirror-state';
const olDOM = ["ol", 0], ulDOM = ["ul", 0], liDOM = ["li", 0];
/**
An ordered list [node spec](https://prosemirror.net/docs/ref/#model.NodeSpec). Has a single
attribute, `order`, which determines the number at which the list
starts counting, and defaults to 1. Represented as an `<ol>`
element.
*/
const orderedList = {
attrs: { order: { default: 1, validate: "number" } },
parseDOM: [{ tag: "ol", getAttrs(dom) {
return { order: dom.hasAttribute("start") ? +dom.getAttribute("start") : 1 };
} }],
toDOM(node) {
return node.attrs.order == 1 ? olDOM : ["ol", { start: node.attrs.order }, 0];
}
};
/**
A bullet list node spec, represented in the DOM as `<ul>`.
*/
const bulletList = {
parseDOM: [{ tag: "ul" }],
toDOM() { return ulDOM; }
};
/**
A list item (`<li>`) spec.
*/
const listItem = {
parseDOM: [{ tag: "li" }],
toDOM() { return liDOM; },
defining: true
};
function add(obj, props) {
let copy = {};
for (let prop in obj)
copy[prop] = obj[prop];
for (let prop in props)
copy[prop] = props[prop];
return copy;
}
/**
Convenience function for adding list-related node types to a map
specifying the nodes for a schema. Adds
[`orderedList`](https://prosemirror.net/docs/ref/#schema-list.orderedList) as `"ordered_list"`,
[`bulletList`](https://prosemirror.net/docs/ref/#schema-list.bulletList) as `"bullet_list"`, and
[`listItem`](https://prosemirror.net/docs/ref/#schema-list.listItem) as `"list_item"`.
`itemContent` determines the content expression for the list items.
If you want the commands defined in this module to apply to your
list structure, it should have a shape like `"paragraph block*"` or
`"paragraph (ordered_list | bullet_list)*"`. `listGroup` can be
given to assign a group name to the list node types, for example
`"block"`.
*/
function addListNodes(nodes, itemContent, listGroup) {
return nodes.append({
ordered_list: add(orderedList, { content: "list_item+", group: listGroup }),
bullet_list: add(bulletList, { content: "list_item+", group: listGroup }),
list_item: add(listItem, { content: itemContent })
});
}
/**
Returns a command function that wraps the selection in a list with
the given type an attributes. If `dispatch` is null, only return a
value to indicate whether this is possible, but don't actually
perform the change.
*/
function wrapInList(listType, attrs = null) {
return function (state, dispatch) {
let { $from, $to } = state.selection;
let range = $from.blockRange($to);
if (!range)
return false;
let tr = dispatch ? state.tr : null;
if (!wrapRangeInList(tr, range, listType, attrs))
return false;
if (dispatch)
dispatch(tr.scrollIntoView());
return true;
};
}
/**
Try to wrap the given node range in a list of the given type.
Return `true` when this is possible, `false` otherwise. When `tr`
is non-null, the wrapping is added to that transaction. When it is
`null`, the function only queries whether the wrapping is
possible.
*/
function wrapRangeInList(tr, range, listType, attrs = null) {
let doJoin = false, outerRange = range, doc = range.$from.doc;
// This is at the top of an existing list item
if (range.depth >= 2 && range.$from.node(range.depth - 1).type.compatibleContent(listType) && range.startIndex == 0) {
// Don't do anything if this is the top of the list
if (range.$from.index(range.depth - 1) == 0)
return false;
let $insert = doc.resolve(range.start - 2);
outerRange = new NodeRange($insert, $insert, range.depth);
if (range.endIndex < range.parent.childCount)
range = new NodeRange(range.$from, doc.resolve(range.$to.end(range.depth)), range.depth);
doJoin = true;
}
let wrap = findWrapping(outerRange, listType, attrs, range);
if (!wrap)
return false;
if (tr)
doWrapInList(tr, range, wrap, doJoin, listType);
return true;
}
function doWrapInList(tr, range, wrappers, joinBefore, listType) {
let content = Fragment.empty;
for (let i = wrappers.length - 1; i >= 0; i--)
content = Fragment.from(wrappers[i].type.create(wrappers[i].attrs, content));
tr.step(new ReplaceAroundStep(range.start - (joinBefore ? 2 : 0), range.end, range.start, range.end, new Slice(content, 0, 0), wrappers.length, true));
let found = 0;
for (let i = 0; i < wrappers.length; i++)
if (wrappers[i].type == listType)
found = i + 1;
let splitDepth = wrappers.length - found;
let splitPos = range.start + wrappers.length - (joinBefore ? 2 : 0), parent = range.parent;
for (let i = range.startIndex, e = range.endIndex, first = true; i < e; i++, first = false) {
if (!first && canSplit(tr.doc, splitPos, splitDepth)) {
tr.split(splitPos, splitDepth);
splitPos += 2 * splitDepth;
}
splitPos += parent.child(i).nodeSize;
}
return tr;
}
/**
Build a command that splits a non-empty textblock at the top level
of a list item by also splitting that list item.
*/
function splitListItem(itemType, itemAttrs) {
return function (state, dispatch) {
let { $from, $to, node } = state.selection;
if ((node && node.isBlock) || $from.depth < 2 || !$from.sameParent($to))
return false;
let grandParent = $from.node(-1);
if (grandParent.type != itemType)
return false;
if ($from.parent.content.size == 0 && $from.node(-1).childCount == $from.indexAfter(-1)) {
// In an empty block. If this is a nested list, the wrapping
// list item should be split. Otherwise, bail out and let next
// command handle lifting.
if ($from.depth == 3 || $from.node(-3).type != itemType ||
$from.index(-2) != $from.node(-2).childCount - 1)
return false;
if (dispatch) {
let wrap = Fragment.empty;
let depthBefore = $from.index(-1) ? 1 : $from.index(-2) ? 2 : 3;
// Build a fragment containing empty versions of the structure
// from the outer list item to the parent node of the cursor
for (let d = $from.depth - depthBefore; d >= $from.depth - 3; d--)
wrap = Fragment.from($from.node(d).copy(wrap));
let depthAfter = $from.indexAfter(-1) < $from.node(-2).childCount ? 1
: $from.indexAfter(-2) < $from.node(-3).childCount ? 2 : 3;
// Add a second list item with an empty default start node
wrap = wrap.append(Fragment.from(itemType.createAndFill()));
let start = $from.before($from.depth - (depthBefore - 1));
let tr = state.tr.replace(start, $from.after(-depthAfter), new Slice(wrap, 4 - depthBefore, 0));
let sel = -1;
tr.doc.nodesBetween(start, tr.doc.content.size, (node, pos) => {
if (sel > -1)
return false;
if (node.isTextblock && node.content.size == 0)
sel = pos + 1;
});
if (sel > -1)
tr.setSelection(Selection.near(tr.doc.resolve(sel)));
dispatch(tr.scrollIntoView());
}
return true;
}
let nextType = $to.pos == $from.end() ? grandParent.contentMatchAt(0).defaultType : null;
let tr = state.tr.delete($from.pos, $to.pos);
let types = nextType ? [itemAttrs ? { type: itemType, attrs: itemAttrs } : null, { type: nextType }] : undefined;
if (!canSplit(tr.doc, $from.pos, 2, types))
return false;
if (dispatch)
dispatch(tr.split($from.pos, 2, types).scrollIntoView());
return true;
};
}
/**
Acts like [`splitListItem`](https://prosemirror.net/docs/ref/#schema-list.splitListItem), but
without resetting the set of active marks at the cursor.
*/
function splitListItemKeepMarks(itemType, itemAttrs) {
let split = splitListItem(itemType, itemAttrs);
return (state, dispatch) => {
return split(state, dispatch && (tr => {
let marks = state.storedMarks || (state.selection.$to.parentOffset && state.selection.$from.marks());
if (marks)
tr.ensureMarks(marks);
dispatch(tr);
}));
};
}
/**
Create a command to lift the list item around the selection up into
a wrapping list.
*/
function liftListItem(itemType) {
return function (state, dispatch) {
let { $from, $to } = state.selection;
let range = $from.blockRange($to, node => node.childCount > 0 && node.firstChild.type == itemType);
if (!range)
return false;
if (!dispatch)
return true;
if ($from.node(range.depth - 1).type == itemType) // Inside a parent list
return liftToOuterList(state, dispatch, itemType, range);
else // Outer list node
return liftOutOfList(state, dispatch, range);
};
}
function liftToOuterList(state, dispatch, itemType, range) {
let tr = state.tr, end = range.end, endOfList = range.$to.end(range.depth);
if (end < endOfList) {
// There are siblings after the lifted items, which must become
// children of the last item
tr.step(new ReplaceAroundStep(end - 1, endOfList, end, endOfList, new Slice(Fragment.from(itemType.create(null, range.parent.copy())), 1, 0), 1, true));
range = new NodeRange(tr.doc.resolve(range.$from.pos), tr.doc.resolve(endOfList), range.depth);
}
const target = liftTarget(range);
if (target == null)
return false;
tr.lift(range, target);
let $after = tr.doc.resolve(tr.mapping.map(end, -1) - 1);
if (canJoin(tr.doc, $after.pos) && $after.nodeBefore.type == $after.nodeAfter.type)
tr.join($after.pos);
dispatch(tr.scrollIntoView());
return true;
}
function liftOutOfList(state, dispatch, range) {
let tr = state.tr, list = range.parent;
// Merge the list items into a single big item
for (let pos = range.end, i = range.endIndex - 1, e = range.startIndex; i > e; i--) {
pos -= list.child(i).nodeSize;
tr.delete(pos - 1, pos + 1);
}
let $start = tr.doc.resolve(range.start), item = $start.nodeAfter;
if (tr.mapping.map(range.end) != range.start + $start.nodeAfter.nodeSize)
return false;
let atStart = range.startIndex == 0, atEnd = range.endIndex == list.childCount;
let parent = $start.node(-1), indexBefore = $start.index(-1);
if (!parent.canReplace(indexBefore + (atStart ? 0 : 1), indexBefore + 1, item.content.append(atEnd ? Fragment.empty : Fragment.from(list))))
return false;
let start = $start.pos, end = start + item.nodeSize;
// Strip off the surrounding list. At the sides where we're not at
// the end of the list, the existing list is closed. At sides where
// this is the end, it is overwritten to its end.
tr.step(new ReplaceAroundStep(start - (atStart ? 1 : 0), end + (atEnd ? 1 : 0), start + 1, end - 1, new Slice((atStart ? Fragment.empty : Fragment.from(list.copy(Fragment.empty)))
.append(atEnd ? Fragment.empty : Fragment.from(list.copy(Fragment.empty))), atStart ? 0 : 1, atEnd ? 0 : 1), atStart ? 0 : 1));
dispatch(tr.scrollIntoView());
return true;
}
/**
Create a command to sink the list item around the selection down
into an inner list.
*/
function sinkListItem(itemType) {
return function (state, dispatch) {
let { $from, $to } = state.selection;
let range = $from.blockRange($to, node => node.childCount > 0 && node.firstChild.type == itemType);
if (!range)
return false;
let startIndex = range.startIndex;
if (startIndex == 0)
return false;
let parent = range.parent, nodeBefore = parent.child(startIndex - 1);
if (nodeBefore.type != itemType)
return false;
if (dispatch) {
let nestedBefore = nodeBefore.lastChild && nodeBefore.lastChild.type == parent.type;
let inner = Fragment.from(nestedBefore ? itemType.create() : null);
let slice = new Slice(Fragment.from(itemType.create(null, Fragment.from(parent.type.create(null, inner)))), nestedBefore ? 3 : 1, 0);
let before = range.start, after = range.end;
dispatch(state.tr.step(new ReplaceAroundStep(before - (nestedBefore ? 3 : 1), after, before, after, slice, 1, true))
.scrollIntoView());
}
return true;
};
}
export { addListNodes, bulletList, liftListItem, listItem, orderedList, sinkListItem, splitListItem, splitListItemKeepMarks, wrapInList, wrapRangeInList };