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Desktop: Fixes #8476: Text that is pasted in Rich Text editor had extra new lines

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This commit is contained in:
Laurent Cozic 2023-07-27 14:48:41 +01:00
parent 35f375d756
commit b9659bb9c1
2 changed files with 78 additions and 7 deletions
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26
packages/lib/htmlUtils.test.ts
View File

@ -10,7 +10,31 @@ describe('htmlUtils', () => {
],
[
'line 1\nline 2',
'<p>line 1</p><p>line 2</p>',
'<p>line 1<br/>line 2</p>',
],
[
'one\n\ntwo\nthree\n\nfour',
'<p>one</p><p>two<br/>three</p><p>four</p>',
],
[
'\n\n',
'<br/><br/>',
],
[
'\n\none',
'<br/><p>one</p>',
],
[
'\none\ntwo\n',
'<p>one<br/>two</p>',
],
[
'one\n\n\ntwo',
'<p>one</p><br/><p>two</p>',
],
[
'one\n\n\n\ntwo',
'<p>one</p><br/><br/><p>two</p>',
],
[
'<img onerror="http://downloadmalware.com"/>',

59
packages/lib/htmlUtils.ts
View File

@ -176,13 +176,60 @@ export default new HtmlUtils();
export function plainTextToHtml(plainText: string): string {
const lines = plainText
.replace(/[\n\r]/g, '\n')
.replace(/\r\n/g, '\n')
.split('\n');
const lineOpenTag = lines.length > 1 ? '<p>' : '';
const lineCloseTag = lines.length > 1 ? '</p>' : '';
if (lines.length === 1) return escapeHtml(lines[0]);
return lines
.map(line => lineOpenTag + escapeHtml(line) + lineCloseTag)
.join('');
// Step 1: Merge adjacent lines into paragraphs, with each line separated by
// '<br/>'. So 'one\ntwo' will become '<p>one</br>two</p>'
const step1: string[] = [];
let currentLine = '';
for (let line of lines) {
line = line.trim();
if (!line) {
if (currentLine) {
step1.push(`<p>${currentLine}</p>`);
currentLine = '';
}
step1.push(line);
} else {
if (currentLine) {
currentLine += `<br/>${escapeHtml(line)}`;
} else {
currentLine = escapeHtml(line);
}
}
}
if (currentLine) step1.push(`<p>${currentLine}</p>`);
// Step 2: Convert the remaining empty lines to <br/> tags. Note that `n`
// successive empty lines should produced `n-1` <br/> tags. This makes more
// sense when looking at the tests.
const step2: string[] = [];
let newLineCount = 0;
for (let i = 0; i < step1.length; i++) {
const line = step1[i];
if (!line) {
newLineCount++;
if (newLineCount >= 2) step2.push('');
} else {
newLineCount = 0;
step2.push(line);
}
}
// Step 3: Actually convert the empty lines to <br/> tags
const step3: string[] = [];
for (const line of step2) {
step3.push(line ? line : '<br/>');
}
return step3.join('');
}