private void WriteUnparsedTag(HtmlTag tag)
{
switch (tag.TagName)
{
case "%@":
{
// store directive for specialized parsing
this.Directives.Append(tag.ToString());
break;
}
case "%!":
{
// analogous to static code, or JSP declarations
// executed only on initialization of template
// output from declarations are appended after the template
this.Declarations.Append(tag.Content);
break;
}
case "%#": // databinding expression
{
// unparsed expressions are emitted directly into JBST
JbstUnparsedBlock code = new JbstUnparsedBlock(tag.Content);
this.AppendChild(code);
break;
}
case "%=": // inline expression
{
// expressions are emitted directly into JBST
JbstExpressionBlock code = new JbstExpressionBlock(tag.Content);
this.AppendChild(code);
break;
}
case "%$":
{
// expressions are emitted directly into JBST
JbstExtensionBlock code = new JbstExtensionBlock(tag.Content, this.path);
this.AppendChild(code);
break;
}
case "%":
{
// statements are emitted directly into JBST
JbstStatementBlock code = new JbstStatementBlock(tag.Content);
this.AppendChild(code);
break;
}
case "%--":
{
// server-side comments are omitted even for debug
break;
}
case "!--":
{
// HTML Comments are emitted directly into JBST
JbstCommentBlock code = new JbstCommentBlock(tag.Content);
this.AppendChild(code);
break;
}
default:
{
// unrecognized sequences get emitted as encoded text
this.AppendChild(tag.ToString());
break;
}
}
}
private void WriteAttributes(HtmlTag tag)
{
foreach (KeyValuePair<string, object> attrib in tag.FilteredAttributes)
{
// normalize JBST command names
string key = attrib.Key.StartsWith(JbstCommandBase.JbstPrefix, StringComparison.OrdinalIgnoreCase) ?
attrib.Key.ToLowerInvariant() : attrib.Key;
if (attrib.Value is string)
{
this.AddAttribute(attrib.Key, (string)attrib.Value);
}
else if (attrib.Value is HtmlTag)
{
HtmlTag codeVal = (HtmlTag)attrib.Value;
switch (codeVal.TagName)
{
case "%@":
{
// store directive for specialized parsing
this.Directives.Append(codeVal.ToString());
break;
}
case "%!":
{
// analogous to static code, or JSP declarations
// executed only on initialization of template
// output from declarations are appended after the template
this.Declarations.Append(codeVal.Content);
break;
}
case "%#": // databinding expression
//{
// // unparsed expressions are emitted directly into JBST
// JbstUnparsedBlock code = new JbstUnparsedBlock(codeVal.Content);
// this.AddAttribute(key, code);
// break;
//}
case "%=": // inline expression
{
// expressions are emitted directly into JBST
JbstExpressionBlock code = new JbstExpressionBlock(codeVal.Content);
this.AddAttribute(key, code);
break;
}
case "%$":
{
// expressions are emitted directly into JBST
JbstExtensionBlock code = new JbstExtensionBlock(codeVal.Content, this.path);
this.AddAttribute(key, code);
break;
}
case "%":
{
// statements are emitted directly into JBST
JbstStatementBlock code = new JbstStatementBlock(codeVal.Content);
this.AddAttribute(key, code);
break;
}
case "%--":
{
// server-side comments are omitted even for debug
break;
}
case "!--":
{
// HTML Comments are emitted directly into JBST
// but get removed when minified
JbstCommentBlock code = new JbstCommentBlock(codeVal.Content);
this.AddAttribute(key, code);
break;
}
default:
{
// unrecognized sequences get emitted as encoded text
this.AddAttribute(key, codeVal.ToString());
break;
}
}
}
}
}
private void WriteStyles(HtmlTag tag)
{
foreach (KeyValuePair<string, string> style in tag.FilteredStyles)
{
this.AddStyle(style.Key, style.Value);
}
}
private void RenderTag(HtmlTag tag)
{
try
{
if (this.htmlFilter == null || this.htmlFilter.FilterTag(tag))
{
this.htmlWriter.WriteTag(tag);
this.taxonomy |= tag.Taxonomy;
}
}
catch (Exception ex)
{
try { this.WriteLiteral("[ERROR: "+ex.Message+"]"); }
catch { }
}
}
void IHtmlWriter.WriteTag(HtmlTag tag)
{
switch (tag.TagType)
{
case HtmlTagType.Unparsed:
{
this.WriteUnparsedTag(tag);
break;
}
case HtmlTagType.FullTag:
case HtmlTagType.BeginTag:
{
this.PushTag(tag.RawName);
if (tag.HasAttributes)
{
this.WriteAttributes(tag);
}
if (tag.HasStyles)
{
this.WriteStyles(tag);
}
if (tag.TagType == HtmlTagType.FullTag)
{
this.PopTag(tag.RawName);
}
break;
}
case HtmlTagType.EndTag:
{
this.PopTag(tag.RawName);
break;
}
}
}
private void RenderCloseTag(HtmlTag tag)
{
tag = tag.CreateCloseTag();
if (tag != null)
{
this.RenderTag(tag);
}
}
/// <summary>
/// Attempts to parse the next sequence as a tag
/// </summary>
/// <returns>null if no tag was found (e.g. just LessThan char)</returns>
private HtmlTag ParseTag()
{
HtmlTag tag = this.ParseBlocks();
if (tag != null)
{
return tag;
}
int i = 1;
char ch = this.Peek(i);
if (ch == EndTagChar)
{
i++;
ch = this.Peek(i);
}
if (!IsNameStartChar(ch))
{
// not a tag, treat as LessThan char
return null;
}
while (IsNameChar(ch))
{
i++;
ch = this.Peek(i);
}
if (!Char.IsWhiteSpace(ch) &&
ch != EndTagChar &&
ch != CloseTagChar)
{
// not a tag, treat as LessThan char
return null;
}
// remove tag open char
this.EmptyBuffer(1);
tag = new HtmlTag(this.FlushBuffer(i-1), this.htmlFilter);
this.ParseSyncPoint();
this.ParseAttributes(tag);
if (this.Current == CloseTagChar)
{
// remove GreaterThan char from source
this.EmptyBuffer(1);
}
return tag;
}
/// <summary>
///
/// </summary>
/// <param name="tag"></param>
/// <param name="style"></param>
private void ParseStyles(HtmlTag tag, string style)
{
string name, value;
int start=0, i=0;
while (i < style.Length)
{
name = value = String.Empty;
// skip whitespace
while (i < style.Length &&
Char.IsWhiteSpace(style, i))
{
start = ++i;
}
// style name
while (i < style.Length &&
style[i] != StylePropChar)
{
i++;
}
// copy style name
if (start < style.Length)
{
name = style.Substring(start, i-start);
}
// inc first
start = ++i;
// skip whitespace
while (i < style.Length &&
Char.IsWhiteSpace(style, i))
{
// inc first
start = ++i;
}
// style value
while (i < style.Length &&
style[i] != StyleDelimChar)
{
// TODO: handle HTML entities (e.g. """)
i++;
}
if (!String.IsNullOrEmpty(name) &&
start < style.Length)
{
// copy style value
value = style.Substring(start, i-start);
// apply style to tag
tag.Styles[name.ToLowerInvariant()] = value;
}
// inc first
start = ++i;
}
}
/// <summary>
/// Parses for "unparsed blocks" (e.g. comments, code blocks)
/// </summary>
/// <returns>null if no comment found</returns>
/// <param name="startDelim"></param>
/// <param name="endDelim"></param>
/// <remarks>
/// This supports comments, DocType declarations, CDATA sections, and ASP/JSP-style blocks.
/// </remarks>
private HtmlTag ParseBlock(string startDelim, string endDelim)
{
int i=0;
for (i=0; i<startDelim.Length; i++)
{
if (this.Peek(i) != startDelim[i])
{
return null;
}
}
// consume LessThan
this.EmptyBuffer(1);
string blockName = this.FlushBuffer(startDelim.Length-1);
i = 0;
while (!this.IsEOF)
{
if (this.Peek(i) == endDelim[i])
{
i++;
if (i == endDelim.Length)
{
break;
}
}
else
{
i = 0;
// add to comment contents
this.Advance();
}
}
this.ParseSyncPoint();
string content = this.FlushBuffer();
if (!this.IsEOF)
{
this.EmptyBuffer(endDelim.Length);
}
HtmlTag unparsed = new HtmlTag(blockName, this.htmlFilter);
if (!String.IsNullOrEmpty(content))
{
unparsed.Content = content;
}
unparsed.EndDelim = endDelim.Substring(0, endDelim.Length-1);
return unparsed;
}
private void ParseAttributes(HtmlTag tag)
{
char ch = this.Current;
while (!this.IsEOF &&
ch != CloseTagChar &&
ch != OpenTagChar)
{
string name = this.ParseAttributeName();
if (name.Length == 1 &&
name[0] == EndTagChar)
{
tag.SetFullTag();
name = String.Empty;
}
this.ParseSyncPoint();
object value = String.Empty;
ch = this.Current;
if (ch != CloseTagChar &&
ch != OpenTagChar)
{
// Get the value(if any)
value = this.ParseAttributeValue();
}
this.ParseSyncPoint();
if (!String.IsNullOrEmpty(name))
{
if (value is String &&
HtmlTag.StyleAttrib.Equals(name, StringComparison.OrdinalIgnoreCase))
{
this.ParseStyles(tag, value.ToString());
}
else
{
tag.Attributes[name] = value;
}
}
ch = this.Current;
}
}
