src/SSCMS.Core/StlParser/StlElement/StlImage.cs

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using System.Collections.Specialized;
using System.Threading.Tasks;
using SSCMS.Core.StlParser.Attributes;
using SSCMS.Parse;
using SSCMS.Core.StlParser.Utility;
using SSCMS.Core.Utils;
using SSCMS.Enums;
using SSCMS.Models;
using SSCMS.Services;
using SSCMS.Utils;

namespace SSCMS.Core.StlParser.StlElement
{
    [StlElement(Title = "显示图片", Description = "通过 stl:image 标签在模板中显示栏目或内容的图片")]
    public static class StlImage
    {
        public const string ElementName = "stl:image";

        [StlAttribute(Title = "栏目索引")]
        private const string ChannelIndex = nameof(ChannelIndex);

        [StlAttribute(Title = "栏目索引")]
        private const string Index = nameof(Index);

        [StlAttribute(Title = "栏目名称")]
        private const string ChannelName = nameof(ChannelName);

        [StlAttribute(Title = "显示父栏目")]
        private const string Parent = nameof(Parent);

        [StlAttribute(Title = "上级栏目的级别")]
        private const string UpLevel = nameof(UpLevel);

        [StlAttribute(Title = "从首页向下的栏目级别")]
        private const string TopLevel = nameof(TopLevel);

        [StlAttribute(Title = "所处上下文")]
        private const string Context = nameof(Context);

        [StlAttribute(Title = "指定存储图片的字段")]
        private const string Type = nameof(Type);

        [StlAttribute(Title = "显示字段存储的第几幅图片，默认为 1")]
        private const string No = nameof(No);

        [StlAttribute(Title = "是否清除 HTML 标签")]
        private const string IsClearTags = nameof(IsClearTags);

        [StlAttribute(Title = "如果是引用内容，是否获取所引用内容的值")]
        private const string IsOriginal = nameof(IsOriginal);

        [StlAttribute(Title = "显示的图片地址")]
        private const string Src = nameof(Src);

        [StlAttribute(Title = "当指定的图片不存在时显示的图片地址")]
        private const string AltSrc = nameof(AltSrc);

        public static async Task<object> ParseAsync(IParseManager parseManager)
        {
            var isGetPicUrlFromAttribute = false;