Perl LibXML获取节点的最后一行数 [英] Perl LibXML get last line number of Node

问题描述

我在Perl中使用LibXML，它存储每个节点的起始行号，但我怎么能得到最后一个？

..

• ..在节点的innerhtml中计算换行符，但是LibXML以不同于原始格式的格式返回innerhtml，以便行号
  
• .. node-> getLastChild-> line_number，但也没有成功。

<如果 line_number 返回了第一行如你所说，所有你需要的是

  my $ s_line_num = $ node-> line_number（）; 
 my $ e_line_num = $ node-> nextSibling（） - > line_number（）; 
  

但事实并非如此。什么 line_number 返回实际上更接近该节点的最后一行的数量。

  my $ s_line_num = $ node-> previousSibling（） - > LINE_NUMBER（）; 
 my $ e_line_num = $ node-> line_number（）; 
  

虽然这是非元素节点返回的结果，但它返回开始的最后一行数标记（而不是整个元素）作为元素。这完全没用。

对不起，不能做！

I use LibXML in Perl, which store the start line number of each node, but how i can get the last one?

I tried get last line number through..

• ..counting newlines in innerhtml of the node, but LibXML return the innerhtml in different formatting than original, so that the line number differ.
• ..node->getLastChild->line_number, but also havin no success.

Any Idea?

解决方案

If line_number returned the first line of a node as you say, all you'd need is

my $s_line_num = $node->line_number();
my $e_line_num = $node->nextSibling()->line_number();

But it doesn't. What line_number returns is actually closer the number of the last line of the node. For that, we could simply look at the previous sibling's line number.

my $s_line_num = $node->previousSibling()->line_number();
my $e_line_num = $node->line_number();

But while that's what it returns for non-element nodes, it returns the last line number of the start tag (rather than of the element as a whole) for elements. That's completely useless.

Sorry, no can do!

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