/************************************************************
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* * Hyphenate CONFIDENTIAL
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* __________________
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* Copyright (C) 2016 Hyphenate Inc. All rights reserved.
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*
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* NOTICE: All information contained herein is, and remains
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* the property of Hyphenate Inc.
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* Dissemination of this information or reproduction of this material
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* is strictly forbidden unless prior written permission is obtained
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* from Hyphenate Inc.
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*/
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#import "EaseTextView.h"
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@implementation EaseTextView
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#pragma mark - Setters
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- (void)setPlaceHolder:(NSString *)placeHolder {
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if([placeHolder isEqualToString:_placeHolder]) {
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return;
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}
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NSUInteger maxChars = [EaseTextView maxCharactersPerLine];
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if([placeHolder length] > maxChars) {
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placeHolder = [placeHolder substringToIndex:maxChars - 8];
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placeHolder = [[placeHolder stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] stringByAppendingFormat:@"..."];
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}
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_placeHolder = placeHolder;
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[self setNeedsDisplay];
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}
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- (void)setPlaceHolderTextColor:(UIColor *)placeHolderTextColor {
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if([placeHolderTextColor isEqual:_placeHolderTextColor]) {
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return;
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}
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_placeHolderTextColor = placeHolderTextColor;
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[self setNeedsDisplay];
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}
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#pragma mark - Message text view
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- (NSUInteger)numberOfLinesOfText
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{
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return [EaseTextView numberOfLinesForMessage:self.text];
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}
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+ (NSUInteger)maxCharactersPerLine {
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return ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone) ? 33 : 109;
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}
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+ (NSUInteger)numberOfLinesForMessage:(NSString *)text {
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return (text.length / [EaseTextView maxCharactersPerLine]) + 1;
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}
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#pragma mark - Text view overrides
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- (void)setText:(NSString *)text {
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[super setText:text];
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[self setNeedsDisplay];
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}
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- (void)setAttributedText:(NSAttributedString *)attributedText {
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[super setAttributedText:attributedText];
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[self setNeedsDisplay];
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}
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//- (void)setContentInset:(UIEdgeInsets)contentInset {
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// [super setContentInset:contentInset];
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// [self setNeedsDisplay];
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//}
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- (void)setFont:(UIFont *)font {
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[super setFont:font];
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[self setNeedsDisplay];
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}
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- (void)setTextAlignment:(NSTextAlignment)textAlignment {
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[super setTextAlignment:textAlignment];
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[self setNeedsDisplay];
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}
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#pragma mark - Notifications
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- (void)didReceiveTextDidChangeNotification:(NSNotification *)notification {
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[self setNeedsDisplay];
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}
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#pragma mark - Life cycle
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- (void)setup {
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self.accessibilityIdentifier = @"text_view";
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(didReceiveTextDidChangeNotification:)
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name:UITextViewTextDidChangeNotification
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object:self];
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_placeHolderTextColor = [UIColor lightGrayColor];
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self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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self.scrollIndicatorInsets = UIEdgeInsetsMake(10.0f, 0.0f, 10.0f, 8.0f);
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self.contentInset = UIEdgeInsetsZero;
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self.scrollEnabled = YES;
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self.scrollsToTop = NO;
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self.userInteractionEnabled = YES;
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self.font = [UIFont systemFontOfSize:16.0f];
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self.textColor = [UIColor blackColor];
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self.backgroundColor = [UIColor whiteColor];
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self.keyboardAppearance = UIKeyboardAppearanceDefault;
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self.keyboardType = UIKeyboardTypeDefault;
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self.returnKeyType = UIReturnKeyDefault;
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self.textAlignment = NSTextAlignmentLeft;
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}
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- (id)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self) {
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// Initialization code
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[self setup];
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}
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return self;
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}
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- (void)dealloc {
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_placeHolder = nil;
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_placeHolderTextColor = nil;
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[[NSNotificationCenter defaultCenter] removeObserver:self name:UITextViewTextDidChangeNotification object:self];
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}
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#pragma mark - Drawing
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- (void)drawRect:(CGRect)rect
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{
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[super drawRect:rect];
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if([self.text length] == 0 && self.placeHolder) {
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CGRect placeHolderRect = CGRectMake(10.0f,
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7.0f,
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rect.size.width,
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rect.size.height);
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[self.placeHolderTextColor set];
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if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_0) {
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;
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paragraphStyle.alignment = self.textAlignment;
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[self.placeHolder drawInRect:placeHolderRect
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withAttributes:@{ NSFontAttributeName : self.font,
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NSForegroundColorAttributeName : self.placeHolderTextColor,
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NSParagraphStyleAttributeName : paragraphStyle }];
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}
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else {
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[self.placeHolder drawInRect:placeHolderRect
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withFont:self.font
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lineBreakMode:NSLineBreakByTruncatingTail
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alignment:self.textAlignment];
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}
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}
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}
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@end
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