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https://github.com/Tencent/Hippy.git
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luomy
78 lines
2.8 KiB
Plaintext
78 lines
2.8 KiB
Plaintext
/*!
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* iOS SDK
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*
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* Tencent is pleased to support the open source community by making
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* Hippy available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company.
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* All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "HippyShadowTextView.h"
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#import "MTTLayout.h"
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#import "x5LayoutUtil.h"
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@interface HippyShadowTextView ()
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@property (nonatomic, strong) NSDictionary *dicAttributes;
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@end
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static MTTSize x5MeasureFunc(
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MTTNodeRef node, float width, MeasureMode widthMeasureMode, __unused float height, __unused MeasureMode heightMeasureMode, void *layoutContext) {
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HippyShadowTextView *shadowText = (__bridge HippyShadowTextView *)MTTNodeGetContext(node);
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NSString *text = shadowText.text ?: shadowText.placeholder;
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if (nil == shadowText.dicAttributes) {
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if (shadowText.font == nil) {
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shadowText.font = [UIFont systemFontOfSize:16];
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}
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shadowText.dicAttributes = @ { NSFontAttributeName: shadowText.font };
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}
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CGSize computedSize = [text sizeWithAttributes:shadowText.dicAttributes];
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MTTSize result;
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result.width = x5CeilPixelValue(computedSize.width);
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result.height = x5CeilPixelValue(computedSize.height);
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return result;
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}
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@implementation HippyShadowTextView
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- (instancetype)init {
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self = [super init];
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if (self) {
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MTTNodeSetMeasureFunc(self.nodeRef, x5MeasureFunc);
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MTTNodeSetContext(self.nodeRef, (__bridge void *)self);
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}
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return self;
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}
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/*
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* text类型控件会响应用户输入交互，但是并不会更新shadowText中的props属性，
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* 导致前端下发新的props属性与当前属性实际值不一致
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* 因此需要对特定属性进行判断.
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* 这个案例中是text属性
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*/
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- (NSDictionary *)mergeProps:(NSDictionary *)props {
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NSDictionary *newProps = [super mergeProps:props];
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BOOL oldPropsContainsText = [[props allKeys] containsObject:@"text"];
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BOOL newPropsContainsText = [[newProps allKeys] containsObject:@"text"];
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if (!newPropsContainsText && oldPropsContainsText) {
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NSDictionary *textDic = [props dictionaryWithValuesForKeys:@[@"text"]];
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NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithDictionary:newProps];
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[dic addEntriesFromDictionary:textDic];
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newProps = dic;
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}
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return newProps;
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}
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@end
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