亚当嵌入d代码

水深无声 2022-09-09 09:48 101阅读 0赞

import arsd.dom;
    
    string toD(string s) { 
    	return `append(` ~ "`" ~ s ~ "`" ~ `);`;
    }
    
    template loadTemplateMixin(string doc) { 
    	string helper() { 
    		Document document = new Document;
    		document.parseSawAspCode = (string) => true;
    		document.parseStrict(doc);
    		string code;
    
    		void expand(Element element) { 
    			if(auto asp = cast(AspCode) element) { 
    				if(asp.source.length > 3 && asp.source[1] == '=')
    					code ~= `append(` ~ asp.source[2 .. $-1] ~ `);`;
    				else
    					code ~= asp.source[1 .. $-1];
    			} else if(auto tn = cast(TextNode) element) { 
    				code ~= toD(tn.toString());
    			} else if(auto sn = cast(SpecialElement) element) { 
    				code ~= toD(sn.toString());
    			} else { 
    				code ~= toD("<" ~ element.tagName);
    				foreach(k, v; element.attributes) { 
    					code ~= toD(" ");
    					code ~= toD(k.htmlEntitiesEncode);
    					code ~= toD("=\"");
    					code ~= toD(v.htmlEntitiesEncode);
    					code ~= toD("\"");
    				}
    
    				code ~= toD(">");
    				foreach(child; element.children)
    					expand(child);
    				code ~= toD("</" ~ element.tagName ~ ">");
    			}
    		}
    
    		expand(document.root);
    
    		return code;
    
    	}
    	enum loadTemplateMixin = helper();
    }
    
    
    // 用法
    
    //也可这样:import("file.html")导入
    enum doc = `<html><script> foo</script><style>css</style><test id="main"><%= my_string[0 .. 5] %></test>
    	<span>foo</span>
    	<span>foo</span>
    	<span>foo</span>
    	<% foreach(item; strings)
    		append(item);
    	%>
    </html>`;
    
    void main() { 
    	string html;
        //在<% %> 块中可看见.
        string my_string = "你好.世界";
    	string[] strings = ["omg", "wtf", "lol"];
    	void append(string s) { 
    		html ~= s;
    	}
    	mixin(loadTemplateMixin!doc);
    	import std.stdio;
    	writeln(html);
    }