1 function AnnotationPlugin(options) {

     2 

     3   const { onChange } = options

     4 

     5   return {

     6     onSelect(event, data, state, editor) {

     7       event.preventDefault()

     8 

     9       const selection = data.selection;

    10 

    11       const startOffset = selection.startOffset;

    12       const endOffset = selection.endOffset;

    13 

    14       if (selection.isCollapsed) {

    15         return;

    16       }

    17 

    18       let nodes = [];

    19       let hasStarted = false;

    20       let hasEnded = false;

    21 

    22       // Keep only the relevant nodes,

    23       // i.e. nodes which are contained within selection

    24       state.document.nodes.forEach((node) => {

    25         if (selection.hasStartIn(node)) {

    26           hasStarted = true;

    27         }

    28         if (hasStarted && !hasEnded) {

    29           nodes.push(node);

    30         }

    31         if (selection.hasEndIn(node)) {

    32           hasEnded = true;

    33         }

    34       });

    35 

    36       let text = '';

    37 

    38       // Concatenate the nodes text

    39       if (nodes.length === 1) {

    40         text = nodes[0].text.substring(startOffset, endOffset);

    41       } else {

    42         text = nodes.map((node) => {

    43           if (selection.hasStartIn(node)) return node.text.substring(startOffset);

    44           if (selection.hasEndIn(node)) return node.text.substring(0, endOffset);

    45           return node.text;

    46         }).join('\n');

    47       }

    48 

    49       if (onChange) {

    50         onChange(text);

    51       }

    52     }

    53 

    54   };

    55 }

    56 

    57 export default AnnotationPlugin;