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Properly backspace over text that was entered when autocorrect updates text with the iPhone on-screen keyboard

This commit is contained in:
Sam Lantinga 2022-09-30 17:25:57 -07:00
parent e6640ef2d4
commit 28572702bf
2 changed files with 31 additions and 20 deletions
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0
Android.mk Normal file → Executable file
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49
src/video/uikit/SDL_uikitviewcontroller.m
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@ -75,7 +75,7 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
BOOL hardwareKeyboard;
BOOL showingKeyboard;
BOOL rotatingOrientation;
NSString *changeText;
NSString *committedText;
NSString *obligateForBackspace;
#endif
}
@ -263,12 +263,12 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
/* Set ourselves up as a UITextFieldDelegate */
- (void)initKeyboard
{
changeText = nil;
obligateForBackspace = @" "; /* 64 space */
textField = [[UITextField alloc] initWithFrame:CGRectZero];
textField.delegate = self;
/* placeholder so there is something to delete! */
textField.text = obligateForBackspace;
committedText = textField.text;
/* set UITextInputTrait properties, mostly to defaults */
textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
@ -408,21 +408,39 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
- (void)textFieldTextDidChange:(NSNotification *)notification
{
if (changeText!=nil && textField.markedTextRange == nil)
{
NSUInteger len = changeText.length;
if (len > 0) {
if (textField.markedTextRange == nil) {
NSUInteger compareLength = SDL_min(textField.text.length, committedText.length);
NSUInteger matchLength;
/* Backspace over characters that are no longer in the string */
for (matchLength = 0; matchLength < compareLength; ++matchLength) {
if ([committedText characterAtIndex:matchLength] != [textField.text characterAtIndex:matchLength]) {
break;
}
}
if (matchLength < committedText.length) {
size_t deleteLength = SDL_utf8strlen([[committedText substringFromIndex:matchLength] UTF8String]);
while (deleteLength > 0) {
/* Send distinct down and up events for each backspace action */
SDL_SendKeyboardKey(SDL_PRESSED, SDL_SCANCODE_BACKSPACE);
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_BACKSPACE);
--deleteLength;
}
}
if (matchLength < textField.text.length) {
NSString *pendingText = [textField.text substringFromIndex:matchLength];
if (!SDL_HardwareKeyboardKeyPressed()) {
/* Go through all the characters in the string we've been sent and
* convert them to key presses */
int i;
for (i = 0; i < len; i++) {
SDL_SendKeyboardUnicodeKey([changeText characterAtIndex:i]);
NSUInteger i;
for (i = 0; i < pendingText.length; i++) {
SDL_SendKeyboardUnicodeKey([pendingText characterAtIndex:i]);
}
}
SDL_SendKeyboardText([changeText UTF8String]);
SDL_SendKeyboardText([pendingText UTF8String]);
}
changeText = nil;
committedText = textField.text;
}
}
@ -463,18 +481,11 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
/* UITextFieldDelegate method. Invoked when user types something. */
- (BOOL)textField:(UITextField *)_textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSUInteger len = string.length;
if (len == 0) {
changeText = nil;
if (textField.markedTextRange == nil) {
/* it wants to replace text with nothing, ie a delete */
SDL_SendKeyboardKeyAutoRelease(SDL_SCANCODE_BACKSPACE);
}
if (textField.text.length < 16) {
textField.text = obligateForBackspace;
committedText = textField.text;
}
} else {
changeText = string;
}
return YES;
}