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[iOS/Text Input] Avoid deleting and reentering unchanged part of text.

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This commit is contained in:
bruvzg 2024-07-08 22:31:01 +03:00
parent 82cedc83c9
commit c632b47b48
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1 changed files with 18 additions and 12 deletions
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30
platform/ios/keyboard_input_view.mm
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@ -149,23 +149,18 @@
return;
}
NSString *substringToDelete = nil;
if (self.previousSelectedRange.length == 0) {
// We are deleting all text before cursor if no range was selected.
// This way any inserted or changed text will be updated.
NSString *substringToDelete = [self.previousText substringToIndex:self.previousSelectedRange.location];
[self deleteText:substringToDelete.length];
// Get previous text to delete.
substringToDelete = [self.previousText substringToIndex:self.previousSelectedRange.location];
} else {
// If text was previously selected
// we are sending only one `backspace`.
// It will remove all text from text input.
// If text was previously selected we are sending only one `backspace`. It will remove all text from text input.
[self deleteText:1];
}
NSString *substringToEnter;
NSString *substringToEnter = nil;
if (self.selectedRange.length == 0) {
// If previous cursor had a selection
// we have to calculate an inserted text.
// If previous cursor had a selection we have to calculate an inserted text.
if (self.previousSelectedRange.length != 0) {
NSInteger rangeEnd = self.selectedRange.location + self.selectedRange.length;
NSInteger rangeStart = MIN(self.previousSelectedRange.location, self.selectedRange.location);
@ -187,7 +182,18 @@
substringToEnter = [self.text substringWithRange:self.selectedRange];
}
[self enterText:substringToEnter];
NSInteger skip = 0;
if (substringToDelete != nil) {
for (NSInteger i = 0; i < MIN([substringToDelete length], [substringToEnter length]); i++) {
if ([substringToDelete characterAtIndex:i] == [substringToEnter characterAtIndex:i]) {
skip++;
} else {
break;
}
}
[self deleteText:[substringToDelete length] - skip]; // Delete changed part of previous text.
}
[self enterText:[substringToEnter substringFromIndex:skip]]; // Enter changed part of new text.
self.previousText = self.text;
self.previousSelectedRange = self.selectedRange;