我正在尝试构建语法高亮指令。
基本上是这样的指令:
<div syntax-highlight="language">{{codeValue}}</div>
应该变成:
<div syntax-highlight="language">
<pre><code>{{codeValue that has been syntax highlighted with span tags}}</code></pre>
</div>
所以我拥有的是:
return {
scope: {
'syntaxHighlight': '@'
},
template: '<pre><code ng-transclude></code></pre>',
transclude: true,
link: function (scope, element, attributes, controller, transclude) {
}
};
当此代码当前运行时,{{codeValue}}
中基本上是字符串的所有内容都会被包含在<code ng-transclude></code>
元素中时放入span
。
这不好,因为我不只是想要code
元素中的字符串。我需要在被转换之前修改这个值。
我需要将此{{codeValue}}
传递给语法突出显示功能,该功能将返回语法突出显示的代码,该代码将是原始HTML(因此原始字符串(已清理和转义)将转换为带有span标记的HTML)。然后,需要将此原始HTML放在code
元素内。
我尝试过使用transclude功能,但内容似乎已被转录。
答案 0 :(得分:2)
所以基本上你想将CodeValue传递给指令并在链接函数中操作它?
怎么样:
<syntaxhighlight codevalue="codeValue"> </syntaxhighlight>
return {
restrict: 'E',
scope: {'codevalue': '='},
template: '<div> <pre><code ><span>{{sanitizedText}}</span></code></pre></div> ',
replace: true,
link: function (scope, element, attributes, controller) {
scope.sanitizedText = textEditingFunction(scope.codevalue); //pass codevalue to the modifying function, who will return the sanitized text
}
};
答案 1 :(得分:2)
这就是我最终做的事情:
['$sce', function($sce){
return {
scope: {
'syntaxLanguage': '@'
},
restrict: 'AE',
template: codeBlockTemplate,
transclude: true,
replace: true,
link: function (scope, element, attributes, controller, transclude) {
//transclude's clone is children elements of the directive element, it will wrap any unwrapped text nodes with the span tag
transclude(scope, function (clone) {
//get the directive element's content as text, this will be the {{code}}
var code = angular.element(clone).text();
//convert the code string into a highlighted code string
var highlightedCode = hljs.highlight(scope.syntaxLanguage, code, true);
//bind to the scope as trusted HTML
scope.highlightedCode = $sce.trustAsHtml(highlightedCode.value);
});
}
};
}]
以此为模板:
<pre><code ng-bind-html="highlightedCode"></code></pre>