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32 lines
763 B
32 lines
763 B
4 years ago
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import Parchment from 'parchment';
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class IdentAttributor extends Parchment.Attributor.Class {
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add(node, value) {
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if (value === '+1' || value === '-1') {
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let indent = this.value(node) || 0;
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value = (value === '+1' ? (indent + 1) : (indent - 1));
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}
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if (value === 0) {
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this.remove(node);
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return true;
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} else {
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return super.add(node, value);
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}
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}
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canAdd(node, value) {
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return super.canAdd(node, value) || super.canAdd(node, parseInt(value));
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}
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value(node) {
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return parseInt(super.value(node)) || undefined; // Don't return NaN
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}
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}
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let IndentClass = new IdentAttributor('indent', 'ql-indent', {
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scope: Parchment.Scope.BLOCK,
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whitelist: [1, 2, 3, 4, 5, 6, 7, 8]
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});
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export { IndentClass };
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