internal static CssSelectors Create(string selector)
{
CssSelectors selectors = new CssSelectors();
selectors.AddFromText(selector);
return(selectors);
}
internal void SetHtml(FrameworkElement rootElement, string htmlText, Control optionalFontTemplate)
{
try
{
// This is the main entry point, initialize everything
_RootElement = rootElement;
if (!(_RootElement is Panel || _RootElement is RichTextBox))
{
return;
}
if (_RootElement is Panel)
{
_CurrentRichTextBox = new RichTextBlock();
(_RootElement as Panel).Children.Clear();
(_RootElement as Panel).Children.Add(_CurrentRichTextBox);
}
else
if (_RootElement is RichTextBox)
{
_CurrentRichTextBox = _RootElement as RichTextBox;
}
_CurrentParagraph = new Paragraph();
_CurrentRichTextBox.Blocks.Add(_CurrentParagraph);
// Setup the initial document state
DocumentState documentState = new DocumentState();
if (optionalFontTemplate == null)
{
optionalFontTemplate = _RootElement as Control;
}
if (optionalFontTemplate != null)
{
documentState.Brush = optionalFontTemplate.Foreground;
documentState.Face = optionalFontTemplate.FontFamily.Source;
documentState.Size = optionalFontTemplate.FontSize;
documentState.Italic = (optionalFontTemplate.FontStyle == FontStyles.Italic);
documentState.Bold = (optionalFontTemplate.FontWeight != FontWeights.Normal);
documentState.Underline = false;
}
else
{
Run defaultRun = new Run();
documentState.Brush = defaultRun.Foreground;
documentState.Face = defaultRun.FontFamily.Source;
documentState.Size = defaultRun.FontSize;
documentState.Italic = (defaultRun.FontStyle == FontStyles.Italic);
documentState.Bold = (defaultRun.FontWeight != FontWeights.Normal);
documentState.Underline = (defaultRun.TextDecorations == TextDecorations.Underline);
}
_DocumentStates = new Stack <DocumentState>();
_DocumentStates.Push(documentState);
_PriorLineBreaks = 2; // As if we are following a paragraph
bool hasMarkup = (htmlText != null && htmlText.IndexOf("<") >= 0 && htmlText.IndexOf(">") > 0);
if (!hasMarkup) // translate ampersands & and the like
{
htmlText = HttpUtility.HtmlEncode(htmlText);
}
bool hasXmlDirective = (hasMarkup && htmlText.IndexOf("<?xml") >= 0);
if (!hasXmlDirective) // add an outer <span> to ensure valid XML regardless of the text markup
{
htmlText = string.Concat("<span>", htmlText, "</span>");
}
bool hasInvalidEntity = (htmlText.IndexOf(" ") >= 0);
if (hasInvalidEntity)
{
htmlText = htmlText.Replace(" ", " ");
}
hasInvalidEntity = (htmlText.IndexOf("©") >= 0);
if (hasInvalidEntity)
{
htmlText = htmlText.Replace("©", "©");
}
// Read the XML DOM input
StringReader stringReader = new StringReader(htmlText);
XmlReaderSettings settings = new XmlReaderSettings();
settings.DtdProcessing = DtdProcessing.Ignore;
settings.IgnoreWhitespace = false;
settings.IgnoreProcessingInstructions = true;
settings.IgnoreComments = true;
//settings.CheckCharacters = false;
//settings.ConformanceLevel = ConformanceLevel.Auto;
XmlReader xmlReader = XmlReader.Create(stringReader, settings);
while (xmlReader.Read())
{
string nameLower = xmlReader.Name.ToLower();
if (xmlReader.NodeType == XmlNodeType.Element)
{
// Process the element start
bool bEmpty = xmlReader.IsEmptyElement;
switch (nameLower)
{
// Process the following elements:
// "style"
// "a" "img" "font"
// "b" "strong"
// "h1" "h2" "h3" "h4" "h5" "h6"
// "i" "em" "cite"
// "u" "br" "pre" "code" "tt"
// "p" "form"
// "ol" "ul" "blockquote" "dir" "menu"
// "li" "div" "center" "span"
case "head":
case "object":
case "meta":
case "title":
case "script":
case "noscript":
{
_IgnoreText = true;
break;
}
case "style":
{
_InternalStyles = string.Empty;
break;
}
case "link":
{
string rel = null;
string href = null;
if (xmlReader.MoveToFirstAttribute())
{
do
{
if (xmlReader.Name.ToLower() == "rel")
{
rel = xmlReader.Value;
}
else
if (xmlReader.Name.ToLower() == "href")
{
href = xmlReader.Value;
}
}while (xmlReader.MoveToNextAttribute());
}
if (rel == "stylesheet" && href != null)
{
if (_DocumentUri != null)
{
href = _DocumentUri.Site().Append(href).ToString();
}
//j CssParser.DownloadStyles(UriHelper.MakeAbsolute(_DocumentUri.Site(), href), ref _GlobalStyles);
}
break;
}
case "a":
case "area":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
string href = null;
if (xmlReader.MoveToFirstAttribute())
{
do
{
if (xmlReader.Name.ToLower() == "href")
{
href = xmlReader.Value;
}
}while (xmlReader.MoveToNextAttribute());
}
if (href != null)
{
if (_DocumentUri != null && !href.StartsWith("#"))
{
href = _DocumentUri.Site().Append(href).ToString();
}
state.Href = href;
}
_DocumentStates.Push(state);
break;
}
case "base":
{
string href = null;
if (xmlReader.MoveToFirstAttribute())
{
do
{
if (xmlReader.Name.ToLower() == "href")
{
href = xmlReader.Value;
}
}while (xmlReader.MoveToNextAttribute());
}
if (href != null)
{
_DocumentUri = new Uri(href, UriKind.Absolute);
}
break;
}
case "img":
{
string source = null;
DocumentState state = _DocumentStates.Peek();
if (xmlReader.MoveToFirstAttribute())
{
do
{
if (xmlReader.Name.ToLower() == "src")
{
source = xmlReader.Value;
}
}while (xmlReader.MoveToNextAttribute());
}
if (source != null)
{
if (_DocumentUri != null)
{
source = _DocumentUri.Site().Append(source).ToString();
}
AddImage(source);
}
break;
}
case "font":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
if (xmlReader.MoveToFirstAttribute())
{
do
{
if (xmlReader.Name.ToLower() == "face")
{
state.Face = xmlReader.Value;
}
else
if (xmlReader.Name.ToLower() == "size")
{
state.Size = CssParser.ParseFontSize(xmlReader.Value, state.Size);
}
else
if (xmlReader.Name.ToLower() == "color")
{
state.Brush = xmlReader.Value.ToColor().ToBrush();
}
}while (xmlReader.MoveToNextAttribute());
}
_DocumentStates.Push(state);
break;
}
case "big":
case "small":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
double percent = (nameLower == "big" ? 1.2 : .8);
state.Size *= percent;
_DocumentStates.Push(state);
break;
}
case "b":
case "strong":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.Bold = true;
_DocumentStates.Push(state);
break;
}
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
{
MoveToBeginLine(true);
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
// Special h? font size handling
if (!ProcessCommonStyles(ref state, xmlReader, nameLower))
{
state.Size = CssParser.ParseFontSize(nameLower, state.Size);
}
state.Bold = true;
_DocumentStates.Push(state);
break;
}
case "i":
case "em":
case "cite":
case "address":
case "dfn": // Definition term
case "var": // Variable
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.Italic = true;
_DocumentStates.Push(state);
break;
}
case "u":
case "ins":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.Underline = true;
_DocumentStates.Push(state);
break;
}
case "s":
case "strike":
case "del":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
//state.StrikeThrough = true;
_DocumentStates.Push(state);
break;
}
case "br":
{
AddLineBreak();
break;
}
case "pre":
case "code":
case "samp": // Sample computer code
case "kbd":
case "tt":
{
if (nameLower == "pre")
{
MoveToBeginLine(true);
}
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.Face = "Courier New";
_DocumentStates.Push(state);
break;
}
case "ol":
case "ul":
case "dir": // Same as "ul"
case "menu": // Same as "ul"
{
DocumentState state = _DocumentStates.Peek();
bool newParagraph = (bEmpty || state.BulletType == '\0');
MoveToBeginLine(newParagraph);
if (bEmpty)
{
break;
}
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.BulletType = (nameLower == "ol" ? 'o' : 'u');
state.ListItemNumber = 0;
state.Indent += 8;
_DocumentStates.Push(state);
break;
}
case "li":
{
MoveToBeginLine(false);
// Bump the list item number
DocumentState state = _DocumentStates.Pop();
state.ListItemNumber++;
_DocumentStates.Push(state);
//DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
AddIndent();
AddListItem();
break;
}
case "blockquote":
{
MoveToBeginLine(true);
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
state.Indent += 8;
_DocumentStates.Push(state);
break;
}
case "div":
case "p":
case "body":
case "form":
case "center":
case "textarea":
{
MoveToBeginLine(true);
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
case "table":
case "caption":
case "tr":
case "td":
{
if (nameLower != "td")
{
MoveToBeginLine(false);
}
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
case "sup":
case "sub":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
case "dl":
case "dt":
case "dd":
{
bool newParagraph = (nameLower == "dl");
MoveToBeginLine(newParagraph);
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
if (nameLower == "dd")
{
state.Indent += 8;
}
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
case "span":
case "label":
case "q":
case "abbr":
case "acronym":
{
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
case "legend":
{
MoveToBeginLine(false);
if (bEmpty)
{
break;
}
DocumentState state = _DocumentStates.Peek();
ProcessCommonStyles(ref state, xmlReader, nameLower);
_DocumentStates.Push(state);
break;
}
}
}
else
if (xmlReader.NodeType == XmlNodeType.EndElement)
{
// Process the element end
switch (nameLower)
{
case "head":
case "object":
case "meta":
case "title":
case "script":
case "noscript":
{
_IgnoreText = false;
break;
}
case "style":
{
_GlobalSelectors = CssSelectors.Create(_InternalStyles);
_InternalStyles = null;
break;
}
case "link":
{
_IgnoreText = false;
break;
}
case "a":
case "area":
{
_DocumentStates.Pop();
break;
}
case "base":
{
break;
}
case "img":
{
break;
}
case "font":
{
_DocumentStates.Pop();
break;
}
case "big":
case "small":
{
_DocumentStates.Pop();
break;
}
case "b":
case "strong":
{
_DocumentStates.Pop();
break;
}
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
{
MoveToBeginLine(true);
_DocumentStates.Pop();
break;
}
case "i":
case "em":
case "cite":
case "address":
case "dfn": // Definition term
case "var": // Variable
{
_DocumentStates.Pop();
break;
}
case "u":
case "ins":
{
_DocumentStates.Pop();
break;
}
case "s":
case "strike":
case "del":
{
_DocumentStates.Pop();
break;
}
case "br":
{
break;
}
case "pre":
case "code":
case "samp": // Sample computer code
case "kbd":
case "tt":
{
if (nameLower == "pre")
{
MoveToBeginLine(true);
}
_DocumentStates.Pop();
break;
}
case "ol":
case "ul":
case "dir":
case "menu":
{
MoveToBeginLine(true);
_DocumentStates.Pop();
break;
}
case "li":
{
MoveToBeginLine(false);
_DocumentStates.Pop();
break;
}
case "blockquote":
{
MoveToBeginLine(true);
_DocumentStates.Pop();
break;
}
case "div":
case "p":
case "body":
case "form":
case "center":
case "textarea":
{
MoveToBeginLine(false);
_DocumentStates.Pop();
break;
}
case "table":
case "caption":
case "tr":
case "td":
{
if (nameLower != "td")
{
MoveToBeginLine(false);
}
_DocumentStates.Pop();
break;
}
case "sup":
case "sub":
{
_DocumentStates.Pop();
break;
}
case "dl":
case "dt":
case "dd":
{
bool newParagraph = (nameLower == "dl");
MoveToBeginLine(newParagraph);
_DocumentStates.Pop();
break;
}
case "span":
case "label":
case "q":
case "abbr":
case "acronym":
{
_DocumentStates.Pop();
break;
}
case "legend":
{
MoveToBeginLine(false);
_DocumentStates.Pop();
break;
}
}
}
else
if (xmlReader.NodeType == XmlNodeType.Text)
{
// Process the element text
string text = "";
try { text = xmlReader.Value; }
catch (Exception ex)
{
text = ex.Message;
}
if (_InternalStyles != null)
{
_InternalStyles += text;
}
else
if (!_IgnoreText)
{
// Remove redundant whitespace ala HTML
StringBuilder builder = new StringBuilder(text.Length);
char cLast = (_PriorLineBreaks > 0 ? ' ' : '\0');
foreach (char ch in text)
{
char c = ch;
if (c == '\t' || c == '\n')
{
c = ' ';
}
bool bSkip = (cLast == ' ' && c == ' ');
cLast = c;
if (!bSkip)
{
builder.Append(c);
}
}
// Output the text
string textRun = builder.ToString();
AddText(textRun);
}
}
else
if (xmlReader.NodeType == XmlNodeType.Whitespace)
{
// Process the element whitespace
if (_InternalStyles != null)
{
_InternalStyles += " ";
}
else
if (!_IgnoreText)
{
// Remove redundant whitespace ala HTML
bool bSkip = (_PriorLineBreaks > 0);
if (!bSkip)
{
AddText(" ");
}
}
}
}
FlushAll();
}
catch (Exception ex)
{
//ex.DebugOutput();
ex.Alert();
// Invalid XHTML; Clear any existing collection of Inlines
if (_RootElement is RichTextBox)
{
(_RootElement as RichTextBox).Blocks.Clear();
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(new Run()
{
Text = htmlText
});
(_RootElement as RichTextBox).Blocks.Add(paragraph);
}
}
finally
{
_DocumentStates.Clear();
_DocumentStates = null;
if (_GlobalSelectors != null)
{
_GlobalSelectors.Dispose();
_GlobalSelectors = null;
}
_RootElement = null;
_CurrentRichTextBox = null;
_CurrentParagraph = null;
}
}
