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Diffstat (limited to 'platform/iphone/keyboard_input_view.mm')
| -rw-r--r-- | platform/iphone/keyboard_input_view.mm | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/platform/iphone/keyboard_input_view.mm b/platform/iphone/keyboard_input_view.mm new file mode 100644 index 0000000000..e2bd0acff4 --- /dev/null +++ b/platform/iphone/keyboard_input_view.mm @@ -0,0 +1,197 @@ +/*************************************************************************/ +/* keyboard_input_view.mm */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 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; + + 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++) { + 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((Key)character, true); + DisplayServerIPhone::get_singleton()->key((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 |