rich-text-editor
Version:
Rich text editor
145 lines (144 loc) • 10.3 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.loadingImage = exports.getAnswer = exports.setCaretPosition = exports.getCaretPositionAfterElement = exports.getCaretPosition = exports.eventHandlerWithoutFocusLoss = void 0;
exports.debounceAnswerSave = debounceAnswerSave;
exports.decodeBase64Image = decodeBase64Image;
exports.isForbiddenInlineImage = isForbiddenInlineImage;
const sanitization_1 = require("./utils/sanitization");
const create_math_stub_1 = require("./utils/create-math-stub");
const eventHandlerWithoutFocusLoss = (fn) => (e) => {
if (fn) {
fn();
}
e.preventDefault();
e.stopPropagation();
return false;
};
exports.eventHandlerWithoutFocusLoss = eventHandlerWithoutFocusLoss;
function debounceAnswerSave(func, timeout) {
let timer = null;
let initialCaretPosition = null;
return function (...args) {
const [content, caretPosition] = args;
if (initialCaretPosition === null) {
initialCaretPosition = caretPosition;
}
if (timer && typeof timeout === 'number') {
clearTimeout(timer);
}
timer = setTimeout(() => {
func(content, initialCaretPosition !== null && initialCaretPosition !== void 0 ? initialCaretPosition : caretPosition);
initialCaretPosition = null;
}, timeout);
};
}
const getCaretPosition = (textField) => {
let caretOffset = 0;
const selection = window.getSelection();
if (!selection)
return caretOffset;
if (selection.rangeCount > 0) {
const range = selection.getRangeAt(0);
const preCaretRange = range.cloneRange();
preCaretRange.selectNodeContents(textField);
preCaretRange.setEnd(range.endContainer, range.endOffset);
caretOffset = preCaretRange.toString().length;
}
return caretOffset;
};
exports.getCaretPosition = getCaretPosition;
const getCaretPositionAfterElement = (textField, element) => {
const range = document.createRange();
range.selectNodeContents(textField);
range.setEndAfter(element);
return range.toString().length;
};
exports.getCaretPositionAfterElement = getCaretPositionAfterElement;
const setCaretPosition = (textField, targetOffset) => {
const range = document.createRange();
let currentOffset = 0;
let found = false;
function traverseNodes(node) {
if (found)
return;
if (node.nodeType === Node.TEXT_NODE) {
const nextOffset = currentOffset + node.textContent.length;
if (nextOffset >= targetOffset) {
range.setStart(node, targetOffset - currentOffset);
range.collapse(true);
found = true;
}
currentOffset = nextOffset;
}
else {
// for non-text (divs and images in our case), traverse their children
for (const child of node.childNodes) {
traverseNodes(child);
if (found)
break;
}
}
}
traverseNodes(textField);
// If the old caret position is not found, default to the end of the field
if (!found) {
range.selectNodeContents(textField);
range.collapse(false);
}
const selection = window.getSelection();
if (selection) {
selection.removeAllRanges();
selection.addRange(range);
}
};
exports.setCaretPosition = setCaretPosition;
const getAnswer = (html) => {
const answerHtml = (0, sanitization_1.sanitize)(html, {
transformTags: {
img: (tagName, attribs) => attribs.src ? { tagName, attribs } : { tagName: '', attribs: {} },
},
exclusiveFilter: (frame) => { var _a; return frame.tag === 'span' && ((_a = frame.attribs) === null || _a === void 0 ? void 0 : _a.class) === create_math_stub_1.MATH_EDITOR_CLASS; },
});
const answer = new DOMParser().parseFromString(answerHtml, 'text/html').body;
const answerText = Array.from(answer.childNodes)
.map((node) => {
if (node.nodeName === 'BR')
return '\n';
return node.textContent;
})
.join('');
const screenshotCount = answer.querySelectorAll(':scope > img:not([src*="/math.svg?"])').length;
const equationCount = answer.querySelectorAll(':scope > img[src*="/math.svg?"]').length;
const isEmpty = (answerText === null || answerText === void 0 ? void 0 : answerText.trim().length) === 0 && screenshotCount === 0 && equationCount === 0;
return {
answerHtml: isEmpty ? '' : stripBrsAndTrimFromEnd(answerHtml),
answerText: stripNewLinesFromStartAndWhiteSpacesFromEnd(answerText !== null && answerText !== void 0 ? answerText : ''),
imageCount: screenshotCount,
};
};
exports.getAnswer = getAnswer;
const stripBrsAndTrimFromEnd = (answerHtml) => answerHtml.replace(/^(\n|<br ?\/?>)*/g, '').replace(/(\s|<br ?\/?>)*$/g, '');
const stripNewLinesFromStartAndWhiteSpacesFromEnd = (answerHtml) => answerHtml.replace(/^(\n)*/g, '').replace(/(\s)*$/g, '');
function decodeBase64Image(dataString) {
const matches = dataString.match(/^data:([A-Za-z-+/]+);base64,(.+)$/);
if (!matches || matches.length !== 3) {
return null;
}
const byteCharacters = atob(matches[2]);
const byteNumbers = new Array(byteCharacters.length);
for (let i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
return {
type: matches[1],
data: new Uint8Array(byteNumbers),
};
}
function isForbiddenInlineImage(type, element, allowedFileTypes) {
const isInlineMathSvg = type === 'image/svg+xml' && element.alt;
if (isInlineMathSvg) {
return false;
}
return !allowedFileTypes.includes(type);
}
exports.loadingImage = 'data:image/gif;base64,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';