/
UUTextField.m
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/
UUTextField.m
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//
// UITextField.m
// Useful Utilities - UITextField extensions
//
// License:
// You are free to use this code for whatever purposes you desire. The only requirement is that you smile everytime you use it.
//
// Contact: @cheesemaker or jon@threejacks.com
#import "UUTextField.h"
#if __has_feature(objc_arc)
#define UU_RELEASE(x) (void)(0)
#define UU_RETAIN(x) x
#define UU_AUTORELEASE(x) x
#define UU_BLOCK_RELEASE(x) (void)(0)
#define UU_BLOCK_COPY(x) [x copy]
#define UU_NATIVE_CAST(x) (__bridge x)
#else
#define UU_RELEASE(x) [x release]
#define UU_RETAIN(x) [x retain]
#define UU_AUTORELEASE(x) [(x) autorelease]
#define UU_BLOCK_RELEASE(x) Block_release(x)
#define UU_BLOCK_COPY(x) Block_copy(x)
#define UU_NATIVE_CAST(x) (x)
#endif
//Implementaiont Comment:
//Unfortunately, while both UITextField and UITextView implement the UITextInput protocol the nearest shared base class they have
//is UIView so we create a private category extension for UIView that is only for use with UITextField and UITextView.
@interface UIView (UUFramework_TextNavigation_Private)
@end
@implementation UIView (UUFramework_TextNavigation_Private)
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - Range manipulation on a UITextInput
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void) uuBackOneLetter
{
}
- (void) uuAdvanceOneLetter
{
}
- (void) uuBackOneWord
{
}
- (void) uuAdvanceOneWord
{
}
- (void) uuAddGestureNavigation
{
}
+ (NSRange) uuSelectedRange:(UIView<UITextInput>*)object
{
UITextPosition* beginning = object.beginningOfDocument;
UITextRange* selectedRange = object.selectedTextRange;
UITextPosition* selectionStart = selectedRange.start;
UITextPosition* selectionEnd = selectedRange.end;
const NSInteger location = [object offsetFromPosition:beginning toPosition:selectionStart];
const NSInteger length = [object offsetFromPosition:selectionStart toPosition:selectionEnd];
return NSMakeRange(location, length);
}
+ (void) uuSetSelectedRange:(NSRange)range onTextInput:(UIView<UITextInput>*)object
{
UITextPosition* beginning = object.beginningOfDocument;
UITextPosition* startPosition = [object positionFromPosition:beginning offset:range.location];
UITextPosition* endPosition = [object positionFromPosition:beginning offset:range.location + range.length];
UITextRange* selectionRange = [object textRangeFromPosition:startPosition toPosition:endPosition];
[object setSelectedTextRange:selectionRange];
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - UITextInput manipulation
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ (void) uuTextInputAdvanceOneLetter:(UIView<UITextInput>*)object
{
NSRange selection = [UIView uuSelectedRange:object];
NSUInteger end = selection.location + selection.length;
//If there is a selection, just go to the right side of the selection
if (selection.length)
{
selection.location = end;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
return;
}
NSString* text = nil;
if ([object respondsToSelector:@selector(text)])
text = [object performSelector:@selector(text)];
if (end < text.length)
{
end++;
selection.location = end;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
}
}
+ (void) uuTextInputBackOneLetter:(UIView<UITextInput>*)object
{
NSRange selection = [UIView uuSelectedRange:object];
NSUInteger end = selection.location + selection.length;
if (selection.length > 0)
{
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
}
else if (end > 0)
{
end--;
selection.location = end;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
}
}
+ (void) uuTextInputAdvanceOneWord:(UIView<UITextInput>*)object
{
NSCharacterSet* characterSet = [NSCharacterSet whitespaceCharacterSet];
NSRange selection = [UIView uuSelectedRange:object];
NSUInteger end = selection.location + selection.length;
//If there is a selection, just go to the right side of the selection
if (selection.length)
{
selection.location = end;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
return;
}
NSString* text = nil;
if ([object respondsToSelector:@selector(text)])
text = [object performSelector:@selector(text)];
NSScanner* scanner = [NSScanner scannerWithString:text];
[scanner setScanLocation:0];
NSUInteger location = text.length;
NSArray* words = [text componentsSeparatedByCharactersInSet:characterSet];
for (NSString* word in words)
{
if ([scanner scanUpToString:word intoString:nil])
{
NSUInteger scanLocation = [scanner scanLocation];
if ( scanLocation > end)
{
location = scanLocation;
break;
}
}
}
selection.location = location;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
}
+ (void) uuTextInputBackOneWord:(UIView<UITextInput>*)object
{
NSCharacterSet* characterSet = [NSCharacterSet whitespaceCharacterSet];
NSRange selection = [UIView uuSelectedRange:object];
//If there is a selection, just go to the left side of the selection
if (selection.length)
{
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
return;
}
NSUInteger end = selection.location + selection.length;
NSString* text = nil;
if ([object respondsToSelector:@selector(text)])
text = [object performSelector:@selector(text)];
NSScanner* scanner = [NSScanner scannerWithString:text];
[scanner setScanLocation:0];
NSUInteger begin = 0;
NSArray* words = [text componentsSeparatedByCharactersInSet:characterSet];
for (NSString* word in words)
{
if ([scanner scanUpToString:word intoString:nil])
{
NSUInteger scanLocation = [scanner scanLocation];
if (scanLocation < end)
begin = scanLocation;
}
}
selection.location = begin;
selection.length = 0;
[UIView uuSetSelectedRange:selection onTextInput:object];
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - UITextInput gesture creation
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ (void) uuAddGestureNavigationToTextInput:(UIView<UITextInput>*)object
{
UISwipeGestureRecognizer* swipeHandler = UU_AUTORELEASE([[UISwipeGestureRecognizer alloc] initWithTarget:object action:@selector(uuBackOneLetter)]);
swipeHandler.direction = UISwipeGestureRecognizerDirectionLeft;
[object.superview addGestureRecognizer:swipeHandler];
swipeHandler = UU_AUTORELEASE([[UISwipeGestureRecognizer alloc] initWithTarget:object action:@selector(uuAdvanceOneLetter)]);
swipeHandler.direction = UISwipeGestureRecognizerDirectionRight;
[object.superview addGestureRecognizer:swipeHandler];
swipeHandler = UU_AUTORELEASE([[UISwipeGestureRecognizer alloc] initWithTarget:object action:@selector(uuBackOneWord)]);
swipeHandler.numberOfTouchesRequired = 2;
swipeHandler.direction = UISwipeGestureRecognizerDirectionLeft;
[object.superview addGestureRecognizer:swipeHandler];
swipeHandler = UU_AUTORELEASE([[UISwipeGestureRecognizer alloc] initWithTarget:object action:@selector(uuAdvanceOneWord)]);
swipeHandler.numberOfTouchesRequired = 2;
swipeHandler.direction = UISwipeGestureRecognizerDirectionRight;
[object.superview addGestureRecognizer:swipeHandler];
}
@end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - UITextField implementation
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@implementation UITextField (UUFramework)
- (void) uuBackOneLetter
{
[UIView uuTextInputBackOneLetter:self];
}
- (void) uuAdvanceOneLetter
{
[UIView uuTextInputAdvanceOneLetter:self];
}
- (void) uuBackOneWord
{
[UIView uuTextInputBackOneWord:self];
}
- (void) uuAdvanceOneWord
{
[UIView uuTextInputAdvanceOneWord:self];
}
- (void) uuAddGestureNavigation
{
[UIView uuAddGestureNavigationToTextInput:self];
}
@end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - UITextView implementation
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@implementation UITextView (UUFramework)
- (void) uuBackOneLetter
{
[UIView uuTextInputBackOneLetter:self];
[self scrollRangeToVisible:self.selectedRange];
}
- (void) uuAdvanceOneLetter
{
[UIView uuTextInputAdvanceOneLetter:self];
[self scrollRangeToVisible:self.selectedRange];
}
- (void) uuBackOneWord
{
[UIView uuTextInputBackOneWord:self];
[self scrollRangeToVisible:self.selectedRange];
}
- (void) uuAdvanceOneWord
{
[UIView uuTextInputAdvanceOneWord:self];
[self scrollRangeToVisible:self.selectedRange];
}
- (void) uuAddGestureNavigation
{
[UIView uuAddGestureNavigationToTextInput:self];
[self scrollRangeToVisible:self.selectedRange];
}
@end