public ABnfElement GetIndentRoot()
{
if (m_indent_root == null)
{
var file = new UIABnfFile(m_full_path, m_abnf_ui, m_view.TextBuffer.CurrentSnapshot.GetText());
m_indent_root = m_abnf_ui.Analysis(file);
}
return(m_indent_root);
}
private bool CheckAutoPair(int offset, char left_pair, string right_pair)
{
if (m_indent_root == null)
{
var file = new UIABnfFile(m_full_path, m_abnf_ui, m_view.TextBuffer.CurrentSnapshot.GetText());
m_indent_root = m_abnf_ui.Analysis(file);
}
if (m_indent_root == null)
{
return(false);
}
// 获取元素
var element = m_indent_root.GetException(offset - 1);
if (element == null)
{
return(false);
}
// 如果是错误元素，那么就以目标元素来判定
if (element is ABnfErrorElement)
{
var error_element = element as ABnfErrorElement;
if (error_element.GetTargetElement() is ABnfRegexElement)
{
return((error_element.GetTargetElement() as ABnfRegexElement).IsMatch(left_pair + right_pair));
}
return(false);
}
// 如果是正则表达式，那么就直接匹配
if (element is ABnfRegexElement)
{
return((element as ABnfRegexElement).IsMatch(left_pair + right_pair));
}
// 获取类型
ABnfNodeElement node = element as ABnfNodeElement;
if (node == null)
{
node = element.GetParent();
}
if (node == null)
{
return(false);
}
// 查找规则
var rule = m_abnf.GetRule(node.GetNodeType());
foreach (var node_list in rule.node.node_list)
{
// 如果还有一个子规则，那么就跳过
if (node_list.Count <= 1)
{
continue;
}
// 如果找到规则并且和left_pair一致，那么就找到left_pair对应的规则
int index = -1;
for (int i = 0; i < node_list.Count; ++i)
{
var node_token = node_list[i];
if (node_token.value == null)
{
continue;
}
if (node_token.value.type == ABnfRuleTokenType.TT_STRING)
{
if (node_token.value.value.Length == 1 &&
node_token.value.value[0] == left_pair)
{
index = i;
break;
}
}
}
// 如果没有找到就跳过当前规则组
if (index == -1)
{
continue;
}
// 从后面往前找，找到与right_pair配对的子规则，如果有，那么就返回true
for (int i = node_list.Count - 1; i >= index + 1; --i)
{
var node_token = node_list[i];
if (node_token.value == null)
{
continue;
}
if (node_token.value.type == ABnfRuleTokenType.TT_STRING)
{
if (node_token.value.value == right_pair)
{
return(true);
}
}
}
}
return(false);
}
