| 1 | import Parchment from 'parchment';
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| 2 |
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| 3 | class IdentAttributor extends Parchment.Attributor.Class {
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| 4 | add(node, value) {
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| 5 | if (value === '+1' || value === '-1') {
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| 6 | let indent = this.value(node) || 0;
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| 7 | value = (value === '+1' ? (indent + 1) : (indent - 1));
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| 8 | }
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| 9 | if (value === 0) {
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| 10 | this.remove(node);
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| 11 | return true;
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| 12 | } else {
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| 13 | return super.add(node, value);
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| 14 | }
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| 15 | }
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| 16 |
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| 17 | canAdd(node, value) {
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| 18 | return super.canAdd(node, value) || super.canAdd(node, parseInt(value));
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| 19 | }
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| 20 |
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| 21 | value(node) {
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| 22 | return parseInt(super.value(node)) || undefined;
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| 23 | }
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| 24 | }
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| 25 |
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| 26 | let IndentClass = new IdentAttributor('indent', 'ql-indent', {
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| 27 | scope: Parchment.Scope.BLOCK,
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| 28 | whitelist: [1, 2, 3, 4, 5, 6, 7, 8]
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| 29 | });
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| 30 |
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| 31 | export { IndentClass };
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