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Preserve location on first and last line when scrolling through inputs

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This commit is contained in:
Nachtalb 2021-05-01 00:51:55 +02:00
parent c66f9c885e
commit c5f6b4617f
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1 changed files with 27 additions and 6 deletions
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33
client/components/ChatInput.vue
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@ -140,11 +140,10 @@ export default {
return;
}
const onRow = (
this.$refs.input.value.slice(null, this.$refs.input.selectionStart).match(/\n/g) ||
[]
).length;
const totalRows = (this.$refs.input.value.match(/\n/g) || []).length;
const oldValue = this.$refs.input.value;
const oldPosition = this.$refs.input.selectionStart;
const onRow = (oldValue.slice(null, oldPosition).match(/\n/g) || []).length;
const totalRows = (oldValue.match(/\n/g) || []).length;
const {channel} = this;
@ -165,7 +164,29 @@ export default {
}
channel.pendingMessage = channel.inputHistory[channel.inputHistoryPosition];
this.$refs.input.value = channel.pendingMessage;
const newValue = channel.pendingMessage;
this.$refs.input.value = newValue;
let newPosition;
if (key === "up") {
const lastIndexOfNewLine = newValue.lastIndexOf("\n");
const lastLine = newValue.slice(null, lastIndexOfNewLine);
newPosition =
oldPosition > lastLine.length
? newValue.length
: lastIndexOfNewLine + oldPosition + 1;
} else {
const lastPositionOnFirstLine =
newValue.indexOf("\n") === -1 ? newValue.length + 1 : newValue.indexOf("\n");
const relativeRowPos = oldPosition - oldValue.lastIndexOf("\n") - 1;
newPosition =
relativeRowPos > lastPositionOnFirstLine
? lastPositionOnFirstLine
: relativeRowPos;
}
this.$refs.input.setSelectionRange(newPosition, newPosition);
this.setInputSize();
return false;