/// <summary>
/// Read @directive from header file
/// </summary>
private KeyValuePair <string, string> ReadDirective(StringScanner s)
{
var key = s.Scan(@"\s*@(\w+)", 1);
if (key.Length == 0)
{
return(new KeyValuePair <string, string>(null, null));
}
var value = s.Scan(@"[\s\S]*?\n").Trim();
return(new KeyValuePair <string, string>(key, value));
}
/// <summary>
/// Read @directive from header file
/// </summary>
private IEnumerable <KeyValuePair <string, string> > ReadDirectives(StringScanner s)
{
while (!s.HasTerminated)
{
var key = s.Scan(@"\s*@(\w+)", 1);
if (key.Length == 0)
{
yield break;
}
var value = s.Scan(@"[\s\S]*?\n").Trim();
yield return(new KeyValuePair <string, string>(key, string.IsNullOrWhiteSpace(value) ? null : value));
}
}
/// <summary>
/// Read root tags from file
/// </summary>
private HtmlTag ReadTag(StringScanner s)
{
// discard non tag text before
if (!s.Match(@"[\s\S]*?<[\w-]+"))
{
return(null);
}
var tag = new HtmlTag(s.Scan(@"[\s\S]*?<([\w-]+)", 1).ToLower());
// read attributes
while (!s.HasTerminated)
{
var key = s.Scan(@"\s*([\w:@\-\.]+)\s*=?\s*", 1);
var quote = s.Scan(@"[""']");
var value = quote.Length == 0 ?
s.Scan(@"\w+") :
s.Scan(@"([\s\S]*?)" + quote, 1);
if (key.Length > 0)
{
tag.Attributes[key] = value;
}
if (s.Scan(@"\/>").Length > 0)
{
return(tag); // self closed tag
}
if (s.Read(1) == ">")
{
break;
}
}
if (tag.TagName.Equals("link", StringComparison.OrdinalIgnoreCase))
{
return(tag);
}
var expr = (tag.TagName.Equals("template", StringComparison.OrdinalIgnoreCase)) ?
@"([\s\S]*)</" + tag.TagName + ">" :
@"([\s\S]*?)</" + tag.TagName + ">";
tag.InnerHtml.Append(s.Scan(expr, 1));
return(tag);
}
public HtmlFile(string content, StringBuilder globalScripts)
{
var s = new StringScanner(content, RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace);
this.Directives = this.ReadDirectives(s).ToDictionary(x => x.Key, x => x.Value, StringComparer.OrdinalIgnoreCase);
var scoped = false;
var scopedId = "s-" + Guid.NewGuid().ToString("d").Substring(0, 6);
while (!s.HasTerminated)
{
if (s.Match(@"<style\s+scoped>([\s\S]*?)</style>"))
{
if (scoped)
{
this.Template.Append("<h1>Only 1 style scoped supported<h1>");
}
else
{
scoped = true;
var style = s.Scan(@"<style\s+scoped>([\s\S]*?)</style>", 1);
this.Styles.Append($"[{scopedId}] {{ {style} }}");
}
}
else if (s.Match(@"<style>([\s\S]*?)</style>"))
{
this.Styles.Append(s.Scan(@"<style>([\s\S]*?)</style>", 1));
}
else if (s.Match(@"<script>([\s\S]*?)</script>"))
{
this.Scripts.Append(s.Scan(@"<script>([\s\S]*?)</script>", 1));
}
else if (s.Match(@"<script\s+mixin>([\s\S]*?)</script>"))
{
this.Mixins.Add(s.Scan(@"<script\s+mixin>([\s\S]*?)</script>", 1));
}
else if (s.Match(@"<script\s+global>([\s\S]*?)</script>"))
{
globalScripts.Append(s.Scan(@"<script\s+global>([\s\S]*?)</script>", 1));
}
else if (s.Match(@"<template>([\s\S]*?)</template>"))
{
this.Template.Append(s.Scan(@"<template>([\s\S]*?)</template>", 1));
}
else
{
this.Template.Append(s.Read(1));
}
}
// change template if scoped was used
if (scoped)
{
var htm = Regex.Replace(this.Template.ToString(), @"^\s*(<[\w-]+)", $"$1 {scopedId}");
this.Template.Clear();
this.Template.Append(htm);
}
}