/// <summary>
/// Transforms HTML tags to word element labels with different styles to enable rich text.
/// </summary>
/// <param name="htmlText"></param>
/// <param name="targetContainer">
/// The following need to set for the container's style:
/// flex-direction: row;
/// flex-wrap: wrap;
/// </param>
public static void RichTextToVisualElements(string htmlText, VisualElement targetContainer)
{
bool addError = false;
string errorText = "";
try
{
XDocument.Parse("<content>" + htmlText + "</content>");
}
catch (Exception e)
{
targetContainer.Clear();
errorText = e.Message;
htmlText = ShowContentWithError(htmlText);
addError = true;
}
// TODO should translation be a responsibility of the caller of this function instead?
htmlText = Localization.Tr(htmlText);
targetContainer.Clear();
bool boldOn = false; // <b> sets this on </b> sets off
bool italicOn = false; // <i> </i>
bool linkOn = false;
string linkURL = "";
bool firstLine = true;
bool lastLineHadText = false;
// start streaming text per word to elements while retaining current style for each word block
string[] lines = htmlText.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
foreach (string line in lines)
{
string[] words = line.Split(new[] { " " }, StringSplitOptions.None);
if (!firstLine && !lastLineHadText)
{
AddParagraphToElement(targetContainer);
}
if (!firstLine && lastLineHadText)
{
AddLinebreakToElement(targetContainer);
//AddParagraphToElement(targetContainer);
lastLineHadText = false;
}
foreach (string word in words)
{
if (word == "" || word == " " || word == " ")
{
continue;
}
lastLineHadText = true;
string strippedWord = word;
bool removeBold = false;
bool removeItalic = false;
bool addParagraph = false;
bool removeLink = false;
if (strippedWord.Contains("<b>"))
{
strippedWord = strippedWord.Replace("<b>", "");
boldOn = true;
}
if (strippedWord.Contains("<i>"))
{
strippedWord = strippedWord.Replace("<i>", "");
italicOn = true;
}
if (strippedWord.Contains("<a"))
{
strippedWord = strippedWord.Replace("<a", "");
linkOn = true;
}
if (linkOn && strippedWord.Contains("href="))
{
strippedWord = strippedWord.Replace("href=", "");
int linkFrom = strippedWord.IndexOf("\"", StringComparison.Ordinal) + 1;
int linkTo = strippedWord.LastIndexOf("\"", StringComparison.Ordinal);
linkURL = strippedWord.Substring(linkFrom, linkTo - linkFrom);
strippedWord = strippedWord.Substring(linkTo + 2, (strippedWord.Length - 2) - linkTo);
strippedWord.Replace("\">", "");
}
if (strippedWord.Contains("</a>"))
{
strippedWord = strippedWord.Replace("</a>", "");
// TODO </a>text -> also text part is still blue. Parse - for now we can take care when authoring.
removeLink = true;
}
if (strippedWord.Contains("<br/>"))
{
strippedWord = strippedWord.Replace("<br/>", "");
addParagraph = true;
}
if (strippedWord.Contains("</b>"))
{
strippedWord = strippedWord.Replace("</b>", "");
removeBold = true;
}
if (strippedWord.Contains("</i>"))
{
strippedWord = strippedWord.Replace("</i>", "");
removeItalic = true;
}
if (boldOn)
{
Label wordLabel = new Label(strippedWord);
wordLabel.style.unityFontStyleAndWeight = new StyleEnum <FontStyle>(FontStyle.Bold);
targetContainer.Add(wordLabel);
}
else if (italicOn)
{
Label wordLabel = new Label(strippedWord);
wordLabel.style.unityFontStyleAndWeight = new StyleEnum <FontStyle>(FontStyle.Italic);
targetContainer.Add(wordLabel);
}
else if (addParagraph)
{
AddParagraphToElement(targetContainer);
}
else if (linkOn && !string.IsNullOrEmpty(linkURL))
{
var label = new HyperlinkLabel
{
text = strippedWord,
tooltip = linkURL
};
label.RegisterCallback <MouseUpEvent, string>(
(evt, linkurl) =>
{
// Supporting only hyperlinks to Unity's websites.
// The user needs be be logged in in order the hyperlink to work.
UnityConnectProxy.OpenAuthorizedURLInWebBrowser(linkurl);
},
linkURL
);
targetContainer.Add(label);
}
else
{
Label newlabel = new Label(strippedWord);
targetContainer.Add(newlabel);
}
if (removeBold)
{
boldOn = false;
}
if (removeItalic)
{
italicOn = false;
}
if (removeLink)
{
linkOn = false;
linkURL = "";
}
}
firstLine = false;
}
if (addError)
{
var label = new ParseErrorLabel()
{
text = Localization.Tr("PARSE ERROR"),
tooltip = Localization.Tr("Click here to see more information in the console.")
};
label.RegisterCallback <MouseUpEvent>((e) => Debug.LogError(errorText));
targetContainer.Add(label);
}
}
/// <summary>
/// Transforms HTML tags to word element labels with different styles to enable rich text.
/// </summary>
/// <param name="htmlText"></param>
/// <param name="targetContainer">
/// The following need to set for the container's style:
/// flex-direction: row;
/// flex-wrap: wrap;
/// </param>
/// <returns>List of VisualElements made from the parsed text.</returns>
public static List <VisualElement> RichTextToVisualElements(string htmlText, VisualElement targetContainer)
{
bool addError = false;
string errorText = "";
try
{
XDocument.Parse("<content>" + htmlText + "</content>");
}
catch (Exception e)
{
targetContainer.Clear();
errorText = e.Message;
htmlText = ShowContentWithError(htmlText);
addError = true;
}
List <VisualElement> elements = new List <VisualElement>();
targetContainer.Clear();
bool boldOn = false; // <b> sets this on </b> sets off
bool italicOn = false; // <i> </i>
bool forceWordWrap = false;
bool linkOn = false;
string linkURL = "";
bool firstLine = true;
bool lastLineHadText = false;
// start streaming text per word to elements while retaining current style for each word block
string[] lines = htmlText.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
foreach (string line in lines)
{
// Check if the line begins with whitespace and turn that into corresponding Label
string initialWhiteSpaces = "";
foreach (char singleCharacter in line)
{
if (singleCharacter == ' ' || singleCharacter == '\t')
{
initialWhiteSpaces += singleCharacter;
}
else
{
break;
}
}
string processedLine = PreProcessRichText(line);
// Separate the line into words
string[] words = processedLine.Split(new[] { " ", "\t" }, StringSplitOptions.RemoveEmptyEntries);
if (!lastLineHadText)
{
if (!firstLine)
{
elements.Add(AddParagraphToElement(targetContainer));
}
if (initialWhiteSpaces.Length > 0)
{
WhiteSpaceLabel indentationLabel = new WhiteSpaceLabel(initialWhiteSpaces);
targetContainer.Add(indentationLabel);
elements.Add(indentationLabel);
}
}
if (!firstLine && lastLineHadText)
{
elements.Add(AddLinebreakToElement(targetContainer));
lastLineHadText = false;
if (initialWhiteSpaces.Length > 0)
{
WhiteSpaceLabel indentationLabel = new WhiteSpaceLabel(initialWhiteSpaces);
targetContainer.Add(indentationLabel);
elements.Add(indentationLabel);
}
}
foreach (string word in words)
{
// Wrap every character instead of word in case of Chinese and Japanese
// Note: override with <wordwrap>Force word wrapping here</wordwrap>
if (word == "" || word == " " || word == " ")
{
continue;
}
lastLineHadText = true;
string strippedWord = word;
bool removeBold = false;
bool removeItalic = false;
bool addParagraph = false;
bool removeLink = false;
bool removeWordWrap = false;
strippedWord = strippedWord.Trim();
if (strippedWord.Contains("<b>"))
{
strippedWord = strippedWord.Replace("<b>", "");
boldOn = true;
}
if (strippedWord.Contains("<i>"))
{
strippedWord = strippedWord.Replace("<i>", "");
italicOn = true;
}
if (strippedWord.Contains("<wordwrap>"))
{
strippedWord = strippedWord.Replace("<wordwrap>", "");
forceWordWrap = true;
}
if (strippedWord.Contains("<a"))
{
strippedWord = strippedWord.Replace("<a", "");
linkOn = true;
}
bool wrapCharacters = !forceWordWrap && NeedSymbolWrapping(word);
if (linkOn && strippedWord.Contains("href="))
{
strippedWord = strippedWord.Replace("href=", "");
int linkFrom = strippedWord.IndexOf("\"", StringComparison.Ordinal) + 1;
int linkTo = strippedWord.LastIndexOf("\"", StringComparison.Ordinal);
linkURL = strippedWord.Substring(linkFrom, linkTo - linkFrom);
strippedWord = strippedWord.Substring(linkTo + 2, (strippedWord.Length - 2) - linkTo);
strippedWord.Replace("\">", "");
}
if (strippedWord.Contains("</a>"))
{
strippedWord = strippedWord.Replace("</a>", "");
removeLink = true;
}
if (strippedWord.Contains("<br/>"))
{
strippedWord = strippedWord.Replace("<br/>", "");
addParagraph = true;
}
if (strippedWord.Contains("</b>"))
{
strippedWord = strippedWord.Replace("</b>", "");
removeBold = true;
}
if (strippedWord.Contains("</i>"))
{
strippedWord = strippedWord.Replace("</i>", "");
removeItalic = true;
}
if (strippedWord.Contains("</wordwrap>"))
{
strippedWord = strippedWord.Replace("</wordwrap>", "");
removeWordWrap = true;
}
if (boldOn && strippedWord != "")
{
if (wrapCharacters)
{
foreach (char character in strippedWord)
{
AddLabel <BoldLabel>(character.ToString(), elements, targetContainer);
}
}
else
{
AddLabel <BoldLabel>(strippedWord, elements, targetContainer);
}
}
else if (italicOn && strippedWord != "")
{
if (wrapCharacters)
{
foreach (char character in strippedWord)
{
AddLabel <ItalicLabel>(character.ToString(), elements, targetContainer);
}
}
else
{
AddLabel <ItalicLabel>(strippedWord, elements, targetContainer);
}
}
else if (addParagraph)
{
elements.Add(AddParagraphToElement(targetContainer));
}
else if (linkOn && !string.IsNullOrEmpty(linkURL))
{
var label = new HyperlinkLabel
{
text = strippedWord,
tooltip = linkURL
};
label.RegisterCallback <MouseUpEvent, string>(
(evt, linkurl) =>
{
TutorialEditorUtils.OpenUrl(linkurl);
},
linkURL
);
targetContainer.Add(label);
elements.Add(label);
}
else
{
if (strippedWord != "")
{
if (wrapCharacters)
{
foreach (char character in strippedWord)
{
AddLabel <TextLabel>(character.ToString(), elements, targetContainer);
}
}
else
{
AddLabel <TextLabel>(strippedWord, elements, targetContainer);
}
}
}
if (removeBold)
{
boldOn = false;
}
if (removeItalic)
{
italicOn = false;
}
if (removeLink)
{
linkOn = false;
linkURL = "";
}
if (removeWordWrap)
{
forceWordWrap = false;
}
}
firstLine = false;
}
if (addError)
{
var label = new ParseErrorLabel()
{
text = Localization.Tr("PARSE ERROR"),
tooltip = Localization.Tr("Click here to see more information in the console.")
};
label.RegisterCallback <MouseUpEvent>((e) => Debug.LogError(errorText));
targetContainer.Add(label);
elements.Add(label);
}
return(elements);
}