XOOPS China :: 论坛

回复: 首页区块回调问题 [作者 sscnboluomi]

Mon, 06 Sep 2010 06:27:22 +1500

XOOPS使用::首页区块回调问题
看看值不值

回复: img tag alt [作者 ezsky]

Wed, 25 Aug 2010 08:37:01 +1500

XOOPS使用::img tag alt
LZ说明一下具体环境

回复: [教程]实例讲解怎样用XOOPS初步建站 [作者 zxc]

Tue, 17 Aug 2010 18:29:36 +1500

XOOPS使用::[教程]实例讲解怎样用XOOPS初步建站
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回复: XOOPS中文视频教程 [作者 shenqiulo]

Mon, 16 Aug 2010 14:23:26 +1500

XOOPS使用::XOOPS中文视频教程
还会有下一集吗？期待中。。。

回复: xoops架站视频教程汇总——以台湾欧展嘉老师的为主，好不容易找到的 [作者 hungrybaby]

Mon, 02 Aug 2010 02:43:28 +1500

XOOPS使用::xoops架站视频教程汇总——以台湾欧展嘉老师的为主，好不容易找到的
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回复: xoops 区块回调里的字段在Linux下怎么不起作用... [作者游客]

Tue, 27 Jul 2010 08:57:49 +1500

XOOPS使用::xoops 区块回调里的字段在Linux下怎么不起作用...
呵呵，学习

回复: 秀贝网二级域名 [作者游客]

Tue, 27 Jul 2010 08:53:04 +1500

XOOPS使用::秀贝网二级域名
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回复: 关于新闻字段控制问题?? [作者 ezsky]

Mon, 19 Jul 2010 08:20:03 +1500

XOOPS使用::关于新闻字段控制问题??

这个标题其实已经是一个老生常谈的问题了。很多时候，比如网站最基本的文章列表，标题会很长，而显示列表的区域宽度却没有这么宽，这时候最正常的做法就是让超出宽度的部分文字用省略号(…)来表示。通常做法是网站后台程序截取一定的字符然后输出到前台显示或者前台用javascript截取一定的字符，但是通过控制字数来截取的话还是存在一个大问题的，因为中文和英文的字符宽度问题，这个字数不好控制，而且通用性较差。那么有没有更好的方法呢，比如直接用CSS来解决的，当然是有的。

text-overflow是一个比较特殊的属性，W3C早前的文档中（http://leeiio.me/wp-content/themes/li ... orful/images/out-link.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; padding-right: 12px; background-position: 100% 50%; background-repeat: no-repeat no-repeat; ">目前的文档中没有包含text-overflow属性，FML!）对其的定义是:

http://leeiio.me/wp-content/themes/light-colorful/images/quote.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; background-position: initial initial; background-repeat: no-repeat no-repeat; ">
Name: text-overflow-mode

Value: clip | ellipsis | ellipsis-word

clip : 　不显示省略标记（…），而是简单的裁切

ellipsis : 　当对象内文本溢出时显示省略标记（…），省略标记插入的位置是最后一个字符。

ellipsis-word : 　当对象内文本溢出时显示省略标记（…），省略标记插入的位置是最后一个词（word）。

至于为什么一开始我说text-overflow是一个比较特殊的样式呢？因为我们可以用它代替我们通常所用的标题截取函数，而且这样做对搜索引擎更加友好，如：标题文件有50个汉字，而我们的列表可能只有300px的宽度。如果用标题截取函数，则标题不是完整的，如果我们用CSS样式text-overflow:ellipsis，输出的标题是完整的，只是受容器大小的局限不显示出来罢了（表现上是超出部分显示省略标记…）。

text-overflow: ellipsis属性仅是注解，当文本溢出时是否显示省略标记。并不具备其它的样式属性定义。我们想要实现溢出时产生省略号的效果。还必须定义：强制文本在一行内显示（white-space:nowrap）及溢出内容为隐藏（overflow:hidden）。只有这样才能实现溢出文本显示省略号的效果。http://leeiio.me/wp-content/themes/li ... orful/images/out-link.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; padding-right: 12px; background-position: 100% 50%; background-repeat: no-repeat no-repeat; ">Via.

那么，如果我们要给p标签定义text-overflow:ellipsis就可以这么写：


p {
      white-space: nowrap;
      width: 100%;                  /* IE6 需要定义宽度 */
      overflow: hidden;             
 
      -o-text-overflow: ellipsis;    /* Opera */
      text-overflow:    ellipsis;    /* IE, Safari (WebKit) */
   }

使用样式前：

我是一段测试文字，请分别用IE，Safari，chrome，opera浏览器查看我哦！

使用样式后：

我是一段加长过的测试文字，请分别用IE，Safari，chrome，opera浏览器查看我哦！哈哈哈，看到省略号了么？

浏览器兼容状况

Browser	Lowest Version	Support of
Internet Explorer	6.0	text-overflow
Firefox (Gecko)	—	—
Opera	9.0	-o-text-overflow
Safari (WebKit)	1.3 (312.3)	text-overflow

OH,FML!Firefox不支持这个属性！这回，Firefox你也太另类了吧！还有别的办法么，当然有，方法还挺多的。

比如Mozilla developer center推荐的http://leeiio.me/wp-content/themes/li ... orful/images/out-link.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; padding-right: 12px; background-position: 100% 50%; background-repeat: no-repeat no-repeat; ">-moz-binding CSS属性。Mozilla developer center给出的理由是text-overflow没有W3C的规范…但是因为Firefox支持XUL，一种XML的用户界面语言。并且Firefox还支持XBL，一种XML绑定语言，这样我们就可以使用Mozilla developer center推荐的http://leeiio.me/wp-content/themes/li ... orful/images/out-link.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; padding-right: 12px; background-position: 100% 50%; background-repeat: no-repeat no-repeat; ">-moz-binding CSS属性来绑定XUL里的ellipsis属性了。

1.XUL方式

首先，我们创建XUL，它应该被保存为ellipsis.xml：

<?xml version="1.0"?>  
<bindings   
  xmlns="http://www.mozilla.org/xbl"  
  xmlns:xbl="http://www.mozilla.org/xbl"  
  xmlns:xul="http://www.mozilla.org/keymaster/gate ... r/there.is.only.xul"  
>  
    <binding id="ellipsis">  
        <content>  
            <xul:window>  
                <xul:description crop="end" xbl:inherits="value=xbl:text"><children/></xul:description>  
            </xul:window>  
        </content>  
    </binding>  
</bindings>

然后我们需要把这个xml文件放到一个目录，原来的css需要加一条，变成这样


p {
      white-space: nowrap;
      width: 100%;                  /* IE6 需要定义宽度 */
      overflow: hidden;             
 
      -o-text-overflow: ellipsis;    /* Opera */
      text-overflow:    ellipsis;    /* IE, Safari (WebKit) */
      -moz-binding: url('ellipsis.xml#ellipsis');    /* Firefox */
   }

虽然Firefox通过XUL的方式实现了ellipsis，但是还是需要注意以下这些问题：

1.经过XUL处理过的文本你将不能被选中，按理说-moz-user-select: text; 属性将允许文本被选中，但是我没有试验成功。

2.如果你给父元素绑定了XUL，那么子元素的内容将变得不可见。例如：

It is a longhaha long long long long text!

如果你只是给p节点绑定了XUL，那么在Firefox下你将看不到haha这个内容。

它的源代码实际上是：

<p>It is a long<em> haha</em> long long long long text!</p>

参考资料:

http://www.w3.org/TR/2003/CR-css3-text-20030514/

http://www.quirksmode.org/css/contents.html

https://bugzilla.mozilla.org/show_bug.cgi?id=312156

https://developer.mozilla.org/En/XUL

https://developer.mozilla.org/En/XUL/Description

http://www.rikkertkoppes.com/thoughts/2008/6/

http://www.w3.org/TR/xbl/

http://www.w3.org/TR/css3-text/

2.Javascript方式

既然XUL无法完美解决Firefox下文字溢出显示…，那么我们就求助javascript吧，当然，并不是古老的截取一定数目的字符来实现。

这里以jQuery为例，代码如下：

(function($) {
	$.fn.ellipsis = function(enableUpdating){
		var s = document.documentElement.style;
		if (!('textOverflow' in s || 'OTextOverflow' in s)) {
			return this.each(function(){
				var el = $(this);
				if(el.css("overflow") == "hidden"){
					var originalText = el.html();
					var w = el.width();
 
					var t = $(this.cloneNode(true)).hide().css({
                        'position': 'absolute',
                        'width': 'auto',
                        'overflow': 'visible',
                        'max-width': 'inherit'
                    });
					el.after(t);
 
					var text = originalText;
					while(text.length > 0 && t.width() > el.width()){
						text = text.substr(0, text.length - 1);
						t.html(text + "...");
					}
					el.html(t.html());
 
					t.remove();
 
					if(enableUpdating == true){
						var oldW = el.width();
						setInterval(function(){
							if(el.width() != oldW){
								oldW = el.width();
								el.html(originalText);
								el.ellipsis();
							}
						}, 200);
					}
				}
			});
		} else return this;
	};
})(jQuery);

这段js的原理很简单，就是通过不断的比较宽度值，然后逐个缩短字符宽度，当最后宽度合适的时候，停止循环，就实现了文字溢出显示…的效果。

这段js还需要一段css来配合。

.overflow {
	text-overflow: ellipsis;
	-o-text-overflow: ellipsis;
	white-space: nowrap;
	overflow: hidden;
}

js里有个判断就是当样式里出现text-overflow或者-o-text-overflow的时候，便不会执行这段js。因为支持这两个属性的浏览器可以自己实现ellipsis效果。

这两种方法都可以实现Firefox下ellipsis的效果，如何取舍使用，具体还得根据你要运用到的项目的具体情况来具体分析，XUL实现的方法的不足之处在以上已经很详尽地列举了，如果你可以避免或者说这些无关你项目的大问题，那么XUL不失一个好方法。

至于其他的一些方法你可能在网上也有看到，比如用:after伪类来实现等，个人不推荐，所以我这里也不细说了，如果你有更好的方法，也希望能与我分享，谢谢观看！

作者：Leeiio

原文链接：溢出文本显示省略号,关于text-overflow:ellipsis的那些事

区块调用新闻标题中的截取字符怎么设置??? [作者 xulijunvip]

Mon, 12 Jul 2010 09:51:02 +1500

XOOPS使用::区块调用新闻标题中的截取字符怎么设置???
在后台添加一条新闻后标题字符大过设置的div 想要截取字符像about模块里面的那种请各位前辈们指教!

回复: 首页显示HTTP500错误 [作者 zoe2090]

Sat, 10 Jul 2010 16:37:57 +1500

XOOPS使用::[已解决] 首页显示HTTP500错误
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