[英]Angularjs directive to replace text
How would I create a directive in angularjs that for example takes this element: 我如何在angularjs中创建一个指令,例如获取此元素:
<div>Example text http://example.com</div>
And convert it in to this 并将其转换为此
<div>Example text <a href="http://example.com">http://example.com</a></div>
I already have the functionality written to auto link the text in a function and return the html (let's call the function "autoLink" ) but i'm not up to scratch on my directives. 我已经将函数编写为自动链接函数中的文本并返回html(让我们调用函数“autoLink”),但我不会在我的指令上划伤。
I would also like to add a attribute to the element to pass a object in to the directive. 我还想在元素中添加一个属性,将对象传递给指令。 eg 例如
<div linkprops="link.props" >Example text http://example.com</div>
Where link.props is object like {a: 'bla bla', b: 'waa waa'} which is to be passed to the autoLink function as a second param (the first been the text). 其中link.props是像{a:'bla bla',b:'waa waa'}这样的对象,它将作为第二个参数传递给autoLink函数(第一个是文本)。
Two ways of doing it: 两种方式:
app.directive('parseUrl', function () {
var urlPattern = /(http|ftp|https):\/\/[\w-]+(\.[\w-]+)+([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?/gi;
return {
restrict: 'A',
require: 'ngModel',
replace: true,
scope: {
props: '=parseUrl',
ngModel: '=ngModel'
},
link: function compile(scope, element, attrs, controller) {
scope.$watch('ngModel', function (value) {
var html = value.replace(urlPattern, '<a target="' + scope.props.target + '" href="$&">$&</a>') + " | " + scope.props.otherProp;
element.html(html);
});
}
};
});
HTML: HTML:
<p parse-url="props" ng-model="text"></p>
app.filter('parseUrlFilter', function () {
var urlPattern = /(http|ftp|https):\/\/[\w-]+(\.[\w-]+)+([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?/gi;
return function (text, target, otherProp) {
return text.replace(urlPattern, '<a target="' + target + '" href="$&">$&</a>') + " | " + otherProp;
};
});
HTML: HTML:
<p ng-bind-html-unsafe="text | parseUrlFilter:'_blank':'otherProperty'"></p>
Note: The 'otherProperty'
is just for example, in case you want to pass more properties into the filter. 注意: 'otherProperty'
仅作为示例,以防您想要将更多属性传递到过滤器中。
Update: Improved replacing algorithm. 更新:改进替换算法。
要回答这个问题的前半部分,没有额外的属性要求,可以使用Angular的linky过滤器: https ://docs.angularjs.org/api/ngSanitize/filter/linky
The top voted answer does not work if there are multiple links. 如果有多个链接,则最高投票的答案不起作用。 Linky already does 90% of the work for us, the only problem is that it sanitizes the html thus removing html/newlines. Linky已经为我们完成了90%的工作,唯一的问题是它清理了html,从而删除了html / newlines。 My solution was to just edit the linky filter (below is Angular 1.2.19) to not sanitize the input. 我的解决方案是只编辑linky过滤器(下面是Angular 1.2.19)以不清理输入。
app.filter('linkyUnsanitized', ['$sanitize', function($sanitize) {
var LINKY_URL_REGEXP =
/((ftp|https?):\/\/|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>]/,
MAILTO_REGEXP = /^mailto:/;
return function(text, target) {
if (!text) return text;
var match;
var raw = text;
var html = [];
var url;
var i;
while ((match = raw.match(LINKY_URL_REGEXP))) {
// We can not end in these as they are sometimes found at the end of the sentence
url = match[0];
// if we did not match ftp/http/mailto then assume mailto
if (match[2] == match[3]) url = 'mailto:' + url;
i = match.index;
addText(raw.substr(0, i));
addLink(url, match[0].replace(MAILTO_REGEXP, ''));
raw = raw.substring(i + match[0].length);
}
addText(raw);
return html.join('');
function addText(text) {
if (!text) {
return;
}
html.push(text);
}
function addLink(url, text) {
html.push('<a ');
if (angular.isDefined(target)) {
html.push('target="');
html.push(target);
html.push('" ');
}
html.push('href="');
html.push(url);
html.push('">');
addText(text);
html.push('</a>');
}
};
}]);
I wanted a pause button that swaps text. 我想要一个交换文本的暂停按钮。 here is how I did it: 这是我如何做到的:
in CSS: 在CSS中:
.playpause.paused .pause, .playpause .play { display:none; }
.playpause.paused .play { display:inline; }
in template: 在模板中:
<button class="playpause" ng-class="{paused:paused}" ng-click="paused = !paused">
<span class="play">play</span><span class="pause">pause</span>
</button>
I would analyze the text in the link function on the directive: 我会分析指令上链接函数中的文本:
directive("myDirective", function(){
return {
restrict: "A",
link: function(scope, element, attrs){
// use the 'element' to manipulate it's contents...
}
}
});
Inspired by @Neal I made this "no sanitize" filter from the newer Angular 1.5.8. 受到@Neal的启发,我从较新的Angular 1.5.8制作了这款“no sanitize”过滤器。 It also recognizes addresses without ftp|http(s) but starting with www. 它还识别没有ftp | http(s)的地址,但是以www开头。 This means that both https://google.com
and www.google.com
will be linkyfied. 这意味着https://google.com
和www.google.com
都将被链接。
angular.module('filter.parselinks',[])
.filter('parseLinks', ParseLinks);
function ParseLinks() {
var LINKY_URL_REGEXP =
/((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"\u201d\u2019]/i,
MAILTO_REGEXP = /^mailto:/i;
var isDefined = angular.isDefined;
var isFunction = angular.isFunction;
var isObject = angular.isObject;
var isString = angular.isString;
return function(text, target, attributes) {
if (text == null || text === '') return text;
if (typeof text !== 'string') return text;
var attributesFn =
isFunction(attributes) ? attributes :
isObject(attributes) ? function getAttributesObject() {return attributes;} :
function getEmptyAttributesObject() {return {};};
var match;
var raw = text;
var html = [];
var url;
var i;
while ((match = raw.match(LINKY_URL_REGEXP))) {
// We can not end in these as they are sometimes found at the end of the sentence
url = match[0];
// if we did not match ftp/http/www/mailto then assume mailto
if (!match[2] && !match[4]) {
url = (match[3] ? 'http://' : 'mailto:') + url;
}
i = match.index;
addText(raw.substr(0, i));
addLink(url, match[0].replace(MAILTO_REGEXP, ''));
raw = raw.substring(i + match[0].length);
}
addText(raw);
return html.join('');
function addText(text) {
if (!text) {
return;
}
html.push(text);
}
function addLink(url, text) {
var key, linkAttributes = attributesFn(url);
html.push('<a ');
for (key in linkAttributes) {
html.push(key + '="' + linkAttributes[key] + '" ');
}
if (isDefined(target) && !('target' in linkAttributes)) {
html.push('target="',
target,
'" ');
}
html.push('href="',
url.replace(/"/g, '"'),
'">');
addText(text);
html.push('</a>');
}
};
}
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