src/core/text.js
const context = require('../context');
const bubbleset = require('./bubbleset');
const { getSelection, correctSelection } = require('./utils');
/* eslint-disable max-len */
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const REG_ZWS = /\u200B/;
const TEXT_ZWS = '\u200B';
exports.isEmptyLeft = isEmptyLeft;
exports.isEmptyRight = isEmptyRight;
exports.arrowRight = arrowRight;
exports.arrowLeft = arrowLeft;
exports.remove = remove;
exports.html2text = html2text;
exports.currentTextRange = currentTextRange;
exports.text2bubble = text2bubble;
exports.replaceString = replaceString;
exports.selectAll = selectAll;
exports.textClean = textClean;
exports.checkZws = checkZws;
exports.createZws = createZws;
function isEmptyLeft(selection) {
let { startNode, startOffset } = correctSelection(selection);
let isEmpty = true;
let node = startNode;
while (node) {
if (node.nodeType === Node.TEXT_NODE) {
const value = startOffset > 0 ? node.nodeValue.substring(0, startOffset) : node.nodeValue;
if (textClean(value)) {
isEmpty = false;
break;
}
} else {
break;
}
startOffset = 0;
node = node.previousSibling;
}
return isEmpty;
}
function isEmptyRight(selection) {
let { endNode, endOffset } = correctSelection(selection);
let node = endNode;
while (node) {
if (node.nodeType === Node.TEXT_NODE) {
const value = endOffset > -1 && endOffset < node.nodeValue.length ? node.nodeValue.substring(endOffset) : node.nodeValue;
if (textClean(value)) {
return false;
}
} else {
return false;
}
endOffset = -1;
node = node.nextSibling;
}
return true;
}
function text2bubble(nodeEditor, nodeBubble) {
const selection = getSelection(nodeEditor);
const range = selection && currentTextRange(nodeEditor, selection);
if (range) {
selection.removeAllRanges();
selection.addRange(range);
replace(selection, nodeBubble);
} else {
nodeEditor.appendChild(nodeBubble);
}
return true;
}
function currentTextRange(nodeEditor, selection) {
selection = selection || getSelection(nodeEditor);
if (!selection) {
return;
}
const pointNode = do {
if (selection.focusNode && selection.focusNode.nodeType === Node.TEXT_NODE) {
selection.focusNode;
} else if (selection.anchorNode && selection.anchorNode.nodeType === Node.TEXT_NODE) {
selection.anchorNode;
} else {
undefined;
}
};
if (!pointNode) {
return;
}
let startNode = pointNode;
let endNode = pointNode;
let item = pointNode;
while (item && item.nodeType === Node.TEXT_NODE) {
startNode = item;
item = item.previousSibling;
}
item = pointNode;
while (item && item.nodeType === Node.TEXT_NODE) {
endNode = item;
item = item.nextSibling;
}
const range = nodeEditor.ownerDocument.createRange();
range.setStartBefore(startNode);
range.setEndAfter(endNode);
return range;
}
function remove(selection) {
return replace(selection, createZws());
}
function replace(selection, node) {
if (!selection || !selection.rangeCount) {
return false;
}
const anchor = context.document.createElement('span');
selection.getRangeAt(0).surroundContents(anchor);
anchor.parentNode.replaceChild(node, anchor);
selection.removeAllRanges();
if (node.nodeType === Node.TEXT_NODE) {
const range = context.document.createRange();
// для ИЕ обязательно указывать node.nodeValue.length
range.setStart(node, node.nodeValue.length);
range.collapse(false);
selection.addRange(range);
} else {
selection.collapse(node, 0);
}
return true;
}
function replaceString(data, selection) {
data = textClean(data);
if (!data) {
return false;
}
selection = selection || context.getSelection();
const textNode = context.document.createTextNode(data);
if (!replace(selection, textNode)) {
return false;
}
selection.collapse(textNode, textNode.nodeValue.length);
return true;
}
function arrowLeft(selection, extend) {
selection = selection || context.getSelection();
if (!selection ||
!selection.anchorNode ||
selection.anchorNode.nodeType !== Node.TEXT_NODE) {
return false;
}
let { startNode, endNode, startOffset, endOffset, revert } = correctSelection(selection);
if (!selection.isCollapsed && !extend) {
selection.collapse(startNode, startOffset);
return true;
}
const isNativeExtend = Boolean(selection.extend);
revert = isNativeExtend ? revert : !revert;
let node = revert ? startNode : endNode;
let offset = revert ? startOffset : endOffset;
while (node) {
if (node.nodeType !== Node.TEXT_NODE) {
return false;
}
if (offset === null) {
offset = node.nodeValue.length;
}
if (offset - 1 < 0) {
node = node.previousSibling;
offset = null;
continue;
}
const text = node.nodeValue.substring(offset - 1, offset);
if (checkZws(text)) {
offset = offset - 1;
continue;
}
break;
}
if (!node || offset === null) {
return false;
}
if (extend) {
if (isNativeExtend) {
selection.extend(node, offset - 1);
} else {
const range = context.document.createRange();
if (revert) {
range.setStart(node, offset - 1);
range.setEnd(endNode, endOffset);
} else {
range.setStart(startNode, startOffset);
range.setEnd(node, offset - 1);
}
selection.removeAllRanges();
selection.addRange(range);
}
} else {
selection.collapse(node, offset - 1);
}
return true;
}
function arrowRight(selection, extend) {
selection = selection || context.getSelection();
if (!selection ||
!selection.focusNode ||
selection.focusNode.nodeType !== Node.TEXT_NODE) {
return false;
}
let { startNode, endNode, startOffset, endOffset, revert } = correctSelection(selection);
if (!selection.isCollapsed && !extend) {
selection.collapse(endNode, endOffset);
return true;
}
let node = revert ? startNode : endNode;
let offset = revert ? startOffset : endOffset;
while (node) {
if (node.nodeType !== Node.TEXT_NODE) {
return false;
}
const len = node.nodeValue.length;
if (offset + 1 > len) {
node = node.nextSibling;
offset = 0;
continue;
}
const text = node.nodeValue.substring(offset, offset + 1);
if (checkZws(text)) {
offset = offset + 1;
continue;
}
break;
}
if (!node) {
return false;
}
if (extend) {
const isNativeExtend = Boolean(selection.extend);
if (isNativeExtend) {
selection.extend(node, offset + 1);
} else {
const range = context.document.createRange();
if (revert) {
range.setStart(node, offset + 1);
range.setEnd(endNode, endOffset);
} else {
range.setStart(startNode, startOffset);
range.setEnd(node, offset + 1);
}
selection.removeAllRanges();
selection.addRange(range);
}
} else {
selection.collapse(node, offset + 1);
}
return true;
}
function html2text(value) {
if (!value) {
return '';
}
var DOMContainer = context.document.implementation.createHTMLDocument('').body;
DOMContainer.innerText = value;
return DOMContainer.innerText
.replace(/^[\u0020\u00a0]+$/gm, '')
.replace(/\n/gm, ' ')
.trim();
}
function selectAll(selection, nodeSet) {
selection = selection || context.getSelection();
const node = selection && selection.anchorNode;
if (!node || node.nodeType !== Node.TEXT_NODE) {
return false;
}
let fromNode;
let toNode;
let item = node;
while (item && item.nodeType === Node.TEXT_NODE) {
fromNode = item;
item = item.previousSibling;
}
item = node;
while (item && item.nodeType === Node.TEXT_NODE) {
toNode = item;
item = item.nextSibling;
}
const hasBubbles = bubbleset.hasBubbles(nodeSet);
const range = context.document.createRange();
range.setStartBefore(fromNode);
range.setEndAfter(toNode);
const dataText = textClean(range.toString());
if (dataText || (!dataText && !hasBubbles)) {
if (!dataText) {
range.collapse();
}
selection.removeAllRanges();
selection.addRange(range);
return true;
}
return false;
}
function createZws() {
return context.document.createTextNode(TEXT_ZWS);
}
function checkZws(value) {
return REG_ZWS.test(value);
}
function textClean(value) {
return String(value || '')
.trim()
.replace(REG_REPLACE_NON_PRINTABLE, '');
}