如何为一种新语言编写括号扩展

Question

我正在为一种新的文本语言编写一个括号扩展，它是html和handlebas+javascript的混合体。我想通过使用现有的CodeMirror模式来编写一个代码模式，例如htmlmixed、javascript、handlers。

这是我目前拥有的(main.js(，

define(function (require, exports, module) {
    var CodeMirror = brackets.getModule("thirdparty/CodeMirror/lib/codemirror"),
        LanguageManager = brackets.getModule("language/LanguageManager");
    CodeMirror.defineMode('htmlbars', function (config, parserConfig) {
        var htmlMode = CodeMirror.getMode(config, "htmlmixed"),
            javascriptMode = CodeMirror.getMode(config, "javascript"),
            handlebarsMode = CodeMirror.getMode(config, "handlebars");
        function html(stream, state) {
            var style = htmlMode.token(stream, state.htmlState);
            return style; 
        }
        return {
            startState: function() {
                var state = htmlMode.startState();
                return {token: html, localMode: null, localState: null, htmlState: state};
            },
            copyState: function(state) {
                if (state.localState)
                    var local = CodeMirror.copyState(state.localMode, state.localState);
                    return { token: state.token, localMode: state.localMode, localState: local,
                             htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};
            },
            token: function(stream, state) {
                return state.token(stream, state);
            },
            indent: function(state, textAfter) {
                if (!state.localMode || /^s*<//.test(textAfter))
                    return htmlMode.indent(state.htmlState, textAfter);
                else if (state.localMode.indent)
                    return state.localMode.indent(state.localState, textAfter);
                else
                    return CodeMirror.Pass;
            },
            innerMode: function(state) {
                return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode};
            }
        };
    }); 
    CodeMirror.defineMIME("text/x-xhbs", "htmlbars");
    LanguageManager.defineLanguage("htmlbars", {
        name: "Htmlbars",
        mode: ["htmlbars", "text/x-hbs"],
        fileExtensions: ["xhbs"]
    });
});

---

所以我想知道的是，如果元素以<%开头，以%>结尾等，如何在这里定义使用javascript模式。。。目前它只适用于html

如果需要更多细节，请告诉我。

谢谢！：(

Answer 1

您可以通过使用CodeMirror多路复用模式、轻松实现这一点

例如

define(function (require, exports, module) {
    var CodeMirror = brackets.getModule("thirdparty/CodeMirror/lib/codemirror"),
        LanguageManager = brackets.getModule("language/LanguageManager");
    brackets.getModule(["thirdparty/CodeMirror/mode/handlebars/handlebars", "thirdparty/CodeMirror/mode/javascript/javascript"], function () {
        CodeMirror.defineMode("htmlbars", function (config) {
            return CodeMirror.multiplexingMode(
                CodeMirror.getMode(config, "text/html"),
                {
                    open: "<%",
                    close: "%>",
                    mode: CodeMirror.getMode(config, "javascript"),
                    parseDelimiters: true
                },
                {
                    open: "{{",
                    close: "}}",
                    mode: CodeMirror.getMode(config, "handlebars"),
                    parseDelimiters: true
                }
            );
        });
        CodeMirror.defineMIME("text/x-xhbs", "htmlbars");
        LanguageManager.defineLanguage("htmlbars", {
            name: "Htmlbars",
            mode: ["htmlbars", "text/x-hbs"],
            fileExtensions: ["xhbs"]
        });
    });
});

官方演示：https://codemirror.net/demo/multiplex.html

希望这能帮助其他人。：(