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- 'use strict';
- /*
- Copyright 2012-2015, Yahoo Inc.
- Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
- */
- function InsertionText(text, consumeBlanks) {
- this.text = text;
- this.origLength = text.length;
- this.offsets = [];
- this.consumeBlanks = consumeBlanks;
- this.startPos = this.findFirstNonBlank();
- this.endPos = this.findLastNonBlank();
- }
- const WHITE_RE = /[ \f\n\r\t\v\u00A0\u2028\u2029]/;
- InsertionText.prototype = {
- findFirstNonBlank() {
- let pos = -1;
- const text = this.text;
- const len = text.length;
- let i;
- for (i = 0; i < len; i += 1) {
- if (!text.charAt(i).match(WHITE_RE)) {
- pos = i;
- break;
- }
- }
- return pos;
- },
- findLastNonBlank() {
- const text = this.text;
- const len = text.length;
- let pos = text.length + 1;
- let i;
- for (i = len - 1; i >= 0; i -= 1) {
- if (!text.charAt(i).match(WHITE_RE)) {
- pos = i;
- break;
- }
- }
- return pos;
- },
- originalLength() {
- return this.origLength;
- },
- insertAt(col, str, insertBefore, consumeBlanks) {
- consumeBlanks =
- typeof consumeBlanks === 'undefined'
- ? this.consumeBlanks
- : consumeBlanks;
- col = col > this.originalLength() ? this.originalLength() : col;
- col = col < 0 ? 0 : col;
- if (consumeBlanks) {
- if (col <= this.startPos) {
- col = 0;
- }
- if (col > this.endPos) {
- col = this.origLength;
- }
- }
- const len = str.length;
- const offset = this.findOffset(col, len, insertBefore);
- const realPos = col + offset;
- const text = this.text;
- this.text = text.substring(0, realPos) + str + text.substring(realPos);
- return this;
- },
- findOffset(pos, len, insertBefore) {
- const offsets = this.offsets;
- let offsetObj;
- let cumulativeOffset = 0;
- let i;
- for (i = 0; i < offsets.length; i += 1) {
- offsetObj = offsets[i];
- if (
- offsetObj.pos < pos ||
- (offsetObj.pos === pos && !insertBefore)
- ) {
- cumulativeOffset += offsetObj.len;
- }
- if (offsetObj.pos >= pos) {
- break;
- }
- }
- if (offsetObj && offsetObj.pos === pos) {
- offsetObj.len += len;
- } else {
- offsets.splice(i, 0, { pos, len });
- }
- return cumulativeOffset;
- },
- wrap(startPos, startText, endPos, endText, consumeBlanks) {
- this.insertAt(startPos, startText, true, consumeBlanks);
- this.insertAt(endPos, endText, false, consumeBlanks);
- return this;
- },
- wrapLine(startText, endText) {
- this.wrap(0, startText, this.originalLength(), endText);
- },
- toString() {
- return this.text;
- }
- };
- module.exports = InsertionText;
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