/**************************************************************************/ /* keyboard_input_view.mm */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* 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" #import "display_server_ios.h" #import "os_ios.h" #include "core/os/keyboard.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 cursorStart:(NSInteger)start cursorEnd:(NSInteger)end { self.text = existingString; self.previousText = existingString; NSInteger safeStartIndex = MAX(start, 0); NSRange textRange; // Either a simple cursor or a selection. if (end > 0) { textRange = NSMakeRange(safeStartIndex, end - start); } else { textRange = NSMakeRange(safeStartIndex, 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++) { DisplayServerIOS::get_singleton()->key(Key::BACKSPACE, 0, Key::BACKSPACE, Key::NONE, 0, true); DisplayServerIOS::get_singleton()->key(Key::BACKSPACE, 0, Key::BACKSPACE, Key::NONE, 0, false); } } - (void)enterText:(NSString *)substring { String characters; characters.parse_utf8([substring UTF8String]); for (int i = 0; i < characters.size(); i++) { int character = characters[i]; Key key = Key::NONE; if (character == '\t') { // 0x09 key = Key::TAB; } else if (character == '\n') { // 0x0A key = Key::ENTER; } else if (character == 0x2006) { key = Key::SPACE; } DisplayServerIOS::get_singleton()->key(key, character, key, Key::NONE, 0, true); DisplayServerIOS::get_singleton()->key(key, character, key, Key::NONE, 0, 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