Blogger和WordPress的倒序显示

Blogger和WordPress都可以通过一定的设置,变成一个只供自己查看的私人博客,相当于私人日记本,具体方法是,在博客设置里将其设置为只有作者才能查看,然后将博客设置为在一页内全部显示(比如设置单页文章1千篇),在博客安装一个倒序显示脚本,即可完成日记本的功能,可供导出和打印。

除了打印,还可以将内容复制到TXT文件里,在邮箱里发送到Kindle邮箱,然后在自己的Kindle上看,相当于看书的体验。

这里面的一个技术问题是如何在Blogger和WordPress里实现按照日期倒序显示(Reverse Post Order)。这里分别给出Blogger和WordPress实现倒序的方法。

在Blogger中,页脚点击“添加小工具”,添加“HTML/JavaScript”微件,之后在微件内容里插入如下代码:

<!– Start Post Reversal Code –>
<script type=’text/javascript’>
//<![CDATA[
// —————————————————————————————–
// Name : PRS – Post Reversal Script for Blogger – Version 1.0
// Author : David Yockey
// URL : techsquirrels.blogspot.com/2012/04/swapping-to-reverse-post-order-on.html
// —————————————————————————————–

 

// Temp variable used to shorten classname references
var cn;
// This function is called as needed in the main program below.
function ReversePosts(BlogPostContainer,PostClass) {
// Arguments:
// BlogPostContainer — The node containing the posts to be reversed.
// PostClass — The className of each of the posts in the container to be reversed.
// (may be a single name from among names in the class attribute of the posts)
// Flag for checking whether any posts are found
var found=false;
var BlogPosts = BlogPostContainer.childNodes; // May include text-nodes containing
// whitespace in addition to post-nodes
// Set index variables to top and bottom of BlogPosts list
var i=0;
var j=BlogPosts.length-1;
for( ; ; ) { // Start Endless Loop
// Find next Post from the top
while( (i < j) && (!(cn=BlogPosts[i].className) || !(cn.match(PostClass))) )
++i;
// Find next Post from the bottom
while( (i < j) && (!(cn=BlogPosts[j].className) || !(found=cn.match(PostClass))) ) // (see Footnote 1)
–j;
if( found && i < j ) {
// Swap Posts (see Footnote 2)
var tempi = BlogPosts[i].cloneNode(true); // Store a copy of Post i in tempi
var tempj = BlogPosts[j].cloneNode(true); // Store a copy of Post j in tempj

 

BlogPostContainer.replaceChild(tempi,BlogPosts[j]); // Replace Post j with Post i in tempi
BlogPostContainer.replaceChild(tempj,BlogPosts[i]); // Replace Post i with Post j in tempj
} else {
// Done
break; // Break out of Endless Loop
}
++i; –j;
}
}
// Footnote 1:
// If a post is found from one end, then a post must necessarily be found from the other.
// So, recording and later checking for a post from one end is sufficient to ensure that
// one was found from both.
//
// Footnote 2:
// At least in Firefox 11.0 on Fedora Linux, replacing a child directly with another child
// causes some text-nodes containing whitespace to be deleted. That node deletion messes up

 

// the positions of the posts in the BlogPosts list. This is avoided by cloning both posts
// rather than just one and replacing both posts from the cloned copies.
// *** MAIN POST REVERSAL PROGRAM ***
// Magic Words
var BlogWidget = ‘Blog1’;
var BlogPostContainerClass = ‘blog-posts’;
var BlogPostClass = ‘date-outer’;
var DatePostContainerClass = ‘date-posts’;
var DatePostClass = ‘post-outer’;
var Blog1 = document.getElementById(BlogWidget);
// Find the node containing the blog posts
var BlogPostContainer;
var x=0;
do {
BlogPostContainer = Blog1.childNodes[x++];
} while ( !(cn=BlogPostContainer.className) || !(cn.match(BlogPostContainerClass)) );
// Reverse different day posts
ReversePosts(BlogPostContainer,BlogPostClass);
// Reverse same day posts – Loop thru contents of BlogPostContainer to find each day’s posts
var BlogPosts = BlogPostContainer.childNodes;
for ( i = 0; i < BlogPosts.length; ++i ) {
// Check for an actual post-node rather than a text-node or such
if ( (cn=BlogPosts[i].className) && cn.match(BlogPostClass) ) {
var DatePostContainer;
x=0;
// Find the node containing the posts to be reversed for the current day being processed
do {
DatePostContainer = BlogPosts[i].childNodes[x++];
} while ( !(cn=DatePostContainer.className) || !(cn.match(DatePostContainerClass)) );
ReversePosts(DatePostContainer,DatePostClass);
}
}
//]]>
</script>
<!– End Post Reversal Code –>

之后保存,设置“主页上显示的博文数量上限”的数量,然后打开页面即可看到倒序的文章。

对于WordPress来说,操作起来比较简单,安装一个名为“Chronological Posts”的Plugin即可实现倒序文章。

从安全性来说,Blogger更为安全一些,谷歌帐号设置两步验证,在谷歌Blogger中写内容,然后设置只有自己只读,安装一个倒序显示脚本,然后复制到TXT文件里,在邮箱里发送到Kindle邮箱,然后在自己的Kindle上看,看完了就删,只要谷歌帐号不泄露,秘密的信息就不会泄漏。

来源:月光博客

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