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Improved selection placement when emoji is typed #22827

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merged 2 commits into from
Jul 17, 2023
Merged

Improved selection placement when emoji is typed #22827

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31096c5
Added getCommonEndingLength and implemented it
alitoshmatov Jul 13, 2023
e1580b5
Updated function name
alitoshmatov Jul 17, 2023
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19 changes: 18 additions & 1 deletion src/libs/ComposerUtils/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -25,4 +25,21 @@ function canSkipTriggerHotkeys(isSmallScreenWidth, isKeyboardShown) {
return (isSmallScreenWidth && DeviceCapabilities.canUseTouchScreen()) || isKeyboardShown;
}

export {getNumberOfLines, updateNumberOfLines, insertText, canSkipTriggerHotkeys};
/**
* Returns the length of the common suffix between two input strings.
* The common suffix is the number of characters shared by both strings
* at the end (suffix) until a mismatch is encountered.
*
* @param {string} str1
* @param {string} str2
* @returns {number} The length of the common suffix between the strings.
*/
function getCommonSuffixLength(str1, str2) {
let i = 0;
while (str1[str1.length - 1 - i] === str2[str2.length - 1 - i]) {
i++;
}
return i;
}

export {getNumberOfLines, updateNumberOfLines, insertText, canSkipTriggerHotkeys, getCommonSuffixLength};
4 changes: 2 additions & 2 deletions src/pages/home/report/ReportActionCompose.js
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Expand Up @@ -797,13 +797,13 @@ class ReportActionCompose extends React.Component {
this.debouncedUpdateFrequentlyUsedEmojis();
}

this.setState((prevState) => {
this.setState(() => {
const newState = {
isCommentEmpty: !!newComment.match(/^(\s)*$/),
value: newComment,
};
if (comment !== newComment) {
const remainder = prevState.value.slice(prevState.selection.end).length;
const remainder = ComposerUtils.getCommonSuffixLength(comment, newComment);
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Coming from #27195, this has caused a small inconsistency between the composer when sending a message and when editing it.
We should have used the same calculation for the remainder (getCommonSuffixLength) in ReportActionItemMessageEdit too.

newState.selection = {
start: newComment.length - remainder,
end: newComment.length - remainder,
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