备份

zengh

2022-05-09 52c39f5e2711e5535b689b66dfa5e100c7882b7f

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
<template>
    <image
        mode="widthFix"
        :lazy-load="node.attr.lazyLoad"
        :class="node.classStr"
        :style="newStyleStr || node.styleStr"
        :data-src="node.attr.src"
        :src="node.attr.src"
        @tap="wxParseImgTap"
        @load="wxParseImgLoad"
    />
</template>
 
<script>
export default {
    name: 'wxParseImg',
    data() {
        return {
            newStyleStr: '',
            preview: true
        };
    },
    inject: ['parseWidth'],
    mounted() {},
    props: {
        node: {
            type: Object,
            default() {
                return {};
            }
        }
    },
    
    methods: {
        wxParseImgTap(e) {
            if (!this.preview) return;
            const { src } = e.currentTarget.dataset;
            if (!src) return;
            let parent = this.$parent;
            while (!parent.preview || typeof parent.preview !== 'function') {
                // TODO 遍历获取父节点执行方法
                parent = parent.$parent;
            }
            parent.preview(src, e);
        },
        // 图片视觉宽高计算函数区
        wxParseImgLoad(e) {
            const { src } = e.currentTarget.dataset;
            if (!src) return;
            let { width, height } = e.mp.detail;
 
            const recal = this.wxAutoImageCal(width, height);
 
            const { imageheight, imageWidth } = recal;
            const { padding, mode } = this.node.attr;//删除padding
            // const { mode } = this.node.attr;
 
            const { styleStr } = this.node;
            const imageHeightStyle = mode === 'widthFix' ? '' : `height: ${imageheight}px;`;
 
            if(!styleStr) this.newStyleStr = `${styleStr}; ${imageHeightStyle}; width: ${imageWidth}px; padding: 0 ${+padding}px;`;//删除padding
            // this.newStyleStr = `${styleStr}; ${imageHeightStyle}; width: ${imageWidth}px;`;
        },
        // 计算视觉优先的图片宽高
        wxAutoImageCal(originalWidth, originalHeight) {
            // 获取图片的原始长宽
            const windowWidth = this.parseWidth.value;
            const results = {};
 
            if (originalWidth < 60 || originalHeight < 60) {
                const { src } = this.node.attr;
                let parent = this.$parent;
                while (!parent.preview || typeof parent.preview !== 'function') {
                    parent = parent.$parent;
                }
                parent.removeImageUrl(src);
                this.preview = false;
            }
 
            // 判断按照那种方式进行缩放
            if (originalWidth > windowWidth) {
                // 在图片width大于手机屏幕width时候
                results.imageWidth = windowWidth;
                results.imageheight = windowWidth * (originalHeight / originalWidth);
            } else {
                // 否则展示原来的数据
                results.imageWidth = originalWidth;
                results.imageheight = originalHeight;
            }
            return results;
        }
    }
};
</script>