@atlaskit/editor-common
Version:
A package that contains common classes and components for editor and renderer
66 lines (64 loc) • 2.48 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.computeSelectionOffsets = computeSelectionOffsets;
exports.restoreSelection = restoreSelection;
var _state = require("@atlaskit/editor-prosemirror/state");
var _selection = require("../selection");
/**
* Compute the new selection offsets after list items have been moved/indented/outdented.
*
* Uses the content start offsets computed during fragment rebuild to map each
* selection endpoint to its new absolute position, accounting for the change
* in the list structure.
*/
function computeSelectionOffsets(_ref) {
var items = _ref.items,
startIndex = _ref.startIndex,
endIndex = _ref.endIndex,
originalFrom = _ref.originalFrom,
originalTo = _ref.originalTo,
contentStartOffsets = _ref.contentStartOffsets,
rootListStart = _ref.rootListStart,
docSize = _ref.docSize;
// +1 shifts from the outer edge of the list item node to the start of the content within
var fromContentStart = items[startIndex].pos + 1;
var toContentStart = items[endIndex].pos + 1;
var fromOffset = originalFrom - fromContentStart;
var toOffset = originalTo - toContentStart;
var clamp = function clamp(pos) {
return Math.min(Math.max(0, pos), docSize);
};
return {
from: clamp(rootListStart + contentStartOffsets[startIndex] + fromOffset),
to: clamp(rootListStart + contentStartOffsets[endIndex] + toOffset)
};
}
/**
* Restore the transaction's selection after a list structural change
* (indent/outdent of list items or task list items).
*
* Uses the content start offsets computed during fragment rebuild to
* map each selection endpoint to its new absolute position.
*
* Handles NodeSelection, GapCursorSelection, and TextSelection.
*/
function restoreSelection(_ref2) {
var tr = _ref2.tr,
originalSelection = _ref2.originalSelection,
from = _ref2.from,
to = _ref2.to;
var maxPos = tr.doc.content.size;
if (originalSelection instanceof _state.NodeSelection) {
try {
tr.setSelection(_state.NodeSelection.create(tr.doc, Math.min(from, maxPos - 1)));
} catch (_unused) {
tr.setSelection(_state.Selection.near(tr.doc.resolve(from)));
}
} else if (originalSelection instanceof _selection.GapCursorSelection) {
tr.setSelection(new _selection.GapCursorSelection(tr.doc.resolve(from), originalSelection.side));
} else {
tr.setSelection(_state.TextSelection.create(tr.doc, from, to));
}
}