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/*************************************************************************/
/* keyboard_input_view.mm */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#import "keyboard_input_view.h"
#include "core/os/keyboard.h"
#include "display_server_iphone.h"
#include "os_iphone.h"
@interface GodotKeyboardInputView () <UITextViewDelegate>
@property(nonatomic, copy) NSString *previousText;
@property(nonatomic, assign) NSRange previousSelectedRange;
@end
@implementation GodotKeyboardInputView
- (instancetype)initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (self) {
[self godot_commonInit];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame textContainer:(NSTextContainer *)textContainer {
self = [super initWithFrame:frame textContainer:textContainer];
if (self) {
[self godot_commonInit];
}
return self;
}
- (void)godot_commonInit {
self.hidden = YES;
self.delegate = self;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(observeTextChange:)
name:UITextViewTextDidChangeNotification
object:self];
}
- (void)dealloc {
self.delegate = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
// MARK: Keyboard
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (BOOL)becomeFirstResponderWithString:(NSString *)existingString multiline:(BOOL)flag cursorStart:(NSInteger)start cursorEnd:(NSInteger)end {
self.text = existingString;
self.previousText = existingString;
NSRange textRange;
// Either a simple cursor or a selection.
if (end > 0) {
textRange = NSMakeRange(start, end - start);
} else {
textRange = NSMakeRange(start, 0);
}
self.selectedRange = textRange;
self.previousSelectedRange = textRange;
return [self becomeFirstResponder];
}
- (BOOL)resignFirstResponder {
self.text = nil;
self.previousText = nil;
return [super resignFirstResponder];
}
// MARK: OS Messages
- (void)deleteText:(NSInteger)charactersToDelete {
for (int i = 0; i < charactersToDelete; i++) {
DisplayServerIPhone::get_singleton()->key(KEY_BACKSPACE, true);
DisplayServerIPhone::get_singleton()->key(KEY_BACKSPACE, false);
}
}
- (void)enterText:(NSString *)substring {
String characters;
characters.parse_utf8([substring UTF8String]);
for (int i = 0; i < characters.size(); i++) {
int character = characters[i];
switch (character) {
case 10:
character = KEY_ENTER;
break;
case 8198:
character = KEY_SPACE;
break;
default:
break;
}
DisplayServerIPhone::get_singleton()->key(character, true);
DisplayServerIPhone::get_singleton()->key(character, false);
}
}
// MARK: Observer
- (void)observeTextChange:(NSNotification *)notification {
if (notification.object != self) {
return;
}
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];
} else {
// If text was previously selected
// we are sending only one `backspace`.
// It will remove all text from text input.
[self deleteText:1];
}
NSString *substringToEnter;
if (self.selectedRange.length == 0) {
// 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);
NSInteger rangeLength = MAX(0, rangeEnd - rangeStart);
NSRange calculatedRange;
if (rangeLength >= 0) {
calculatedRange = NSMakeRange(rangeStart, rangeLength);
} else {
calculatedRange = NSMakeRange(rangeStart, 0);
}
substringToEnter = [self.text substringWithRange:calculatedRange];
} else {
substringToEnter = [self.text substringToIndex:self.selectedRange.location];
}
} else {
substringToEnter = [self.text substringWithRange:self.selectedRange];
}
[self enterText:substringToEnter];
self.previousText = self.text;
self.previousSelectedRange = self.selectedRange;
}
@end
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