public static List <VisualElement> AddRichText(string text, IButtonRegistry buttonRegistry, VisualElement root, bool isInsideCodeBlock)
{
List <VisualElement> results = new List <VisualElement>();
IEnumerable <RichText> richTexts = ParseRichText(text, isInsideCodeBlock);
//Parse rich texts to create paragraphs.
List <List <RichText> > paragraphs = new List <List <RichText> > {
new List <RichText>()
};
foreach (RichText richText in richTexts)
{
if (richText.richTextTag.tag == RichTextTag.Tag.button || richText.richTextTag.tag == RichTextTag.Tag.code)
{
paragraphs[paragraphs.Count - 1].Add(richText);
continue;
}
string[] strings = richText.associatedText.Split('\n');
for (int i = 0; i < strings.Length; i++)
{
if (i != 0)
{
paragraphs.Add(new List <RichText>());
}
//Split paragraph content (already split by tag) into individual words
string[] wordSplit = Regex.Split(strings[i], @"(?<=[ -])"); //Split but keep delimiters attached.
foreach (var word in wordSplit)
{
if (!string.IsNullOrEmpty(word))
{
paragraphs[paragraphs.Count - 1].Add(new RichText(richText.richTextTag, word));
}
}
}
}
foreach (List <RichText> paragraph in paragraphs)
{
//Add all the paragraphs
VisualElement rootTemp = root;
root = AddParagraphContainer(root);
for (int i = 0; i < paragraph.Count; i++)
{
RichText word = paragraph[i];
if (i < paragraph.Count - 1)
{
//If there are more words
RichText nextWord = paragraph[i + 1];
string nextText = nextWord.associatedText;
if (Regex.IsMatch(nextText, "^[^a-zA-Z] ?"))
{
VisualElement inlineGroup = new VisualElement();
root.Add(inlineGroup);
inlineGroup.AddToClassList("inline-text-group");
AddRichTextInternal(word, inlineGroup);
AddRichTextInternal(nextWord, inlineGroup);
++i;
continue;
}
}
AddRichTextInternal(word, root);
//Add all the words and style them.
void AddRichTextInternal(RichText richText, VisualElement rootToAddTo)
{
RichTextTag tag = richText.richTextTag;
TextElement inlineText = null;
switch (tag.tag)
{
case RichTextTag.Tag.none:
inlineText = AddInlineText(richText.associatedText, rootToAddTo);
break;
case RichTextTag.Tag.button:
if (buttonRegistry == null)
{
Debug.LogWarning("There was no ButtonRegistry provided to AddRichText. Button tags will not function.");
inlineText = AddInlineButton(() => Debug.LogWarning("There was no ButtonRegistry provided to AddRichText. Button tags will not function."), richText.associatedText, rootToAddTo);
break;
}
if (!buttonRegistry.GetRegisteredButtonAction(tag.stringVariables, out Action action))
{
return;
}
inlineText = AddInlineButton(action, richText.associatedText, rootToAddTo);
break;
case RichTextTag.Tag.code:
//Scroll
ScrollView codeScroll = new ScrollView(ScrollViewMode.Horizontal);
VisualElement contentContainer = codeScroll.contentContainer;
codeScroll.contentViewport.style.flexDirection = FlexDirection.Column;
codeScroll.contentViewport.style.alignItems = Align.Stretch;
codeScroll.AddToClassList("code-scroll");
root.Add(codeScroll);
contentContainer.ClearClassList();
contentContainer.AddToClassList("code-container");
VisualElement codeContainer = contentContainer;
CSharpHighlighter highlighter = new CSharpHighlighter
{
AddStyleDefinition = false
};
// To add code, we first use the CSharpHighlighter to construct rich text for us.
string highlit = highlighter.Highlight(richText.associatedText);
// After constructing new rich text we pass the text back recursively through this function with the new parent.
AddRichText(highlit, buttonRegistry, codeContainer, true); // only parse spans because this is all the CSharpHighlighter parses.
//Finalise content container
foreach (VisualElement child in codeContainer.Children())
{
if (child.ClassListContains(paragraphContainerClass))
{
child.AddToClassList("code");
if (child.childCount == 1)
{
AddInlineText("", child); //This seems to be required to get layout to function properly.
}
}
}
//Begin Hack
FieldInfo m_inheritedStyle = typeof(VisualElement).GetField("inheritedStyle", BindingFlags.NonPublic | BindingFlags.Instance);
if (m_inheritedStyle == null)
{
m_inheritedStyle = typeof(VisualElement).GetField("m_InheritedStylesData", BindingFlags.NonPublic | BindingFlags.Instance);
}
Type inheritedStylesData = Type.GetType("UnityEngine.UIElements.StyleSheets.InheritedStylesData,UnityEngine");
FieldInfo font = inheritedStylesData.GetField("font", BindingFlags.Public | BindingFlags.Instance);
FieldInfo fontSize = inheritedStylesData.GetField("fontSize", BindingFlags.Public | BindingFlags.Instance);
Font consola = (Font)EditorGUIUtility.Load("consola");
contentContainer.Query <Label>().ForEach(l =>
{
l.AddToClassList("code");
//Hack to regenerate the font size as Rich Text tags are removed from the original calculation.
object value = m_inheritedStyle.GetValue(l);
StyleFont fontVar = (StyleFont)font.GetValue(value);
fontVar.value = consola;
font.SetValue(value, fontVar);
StyleLength fontSizeVar = 12; // = (StyleLength) fontSize.GetValue(value); //This doesn't seem to work properly, hard coded for now.
fontSize.SetValue(value, fontSizeVar);
m_inheritedStyle.SetValue(l, value);
Vector2 measuredTextSize = l.MeasureTextSize(l.text.Replace('>', ' '), 0, VisualElement.MeasureMode.Undefined, 0, VisualElement.MeasureMode.Undefined);
l.style.width = measuredTextSize.x;
l.style.height = measuredTextSize.y;
});
//Button
Button codeCopyButtonButtonContainer = new Button(() =>
{
EditorGUIUtility.systemCopyBuffer = richText.associatedText;
Debug.Log("Copied Code to Clipboard");
});
codeCopyButtonButtonContainer.ClearClassList();
codeCopyButtonButtonContainer.AddToClassList("code-button");
codeCopyButtonButtonContainer.StretchToParentSize();
codeContainer.Add(codeCopyButtonButtonContainer);
break;
case RichTextTag.Tag.span:
Label spanLabel = new Label
{
text = richText.associatedText
};
spanLabel.AddToClassList(tag.stringVariables);
rootToAddTo.Add(spanLabel);
break;
case RichTextTag.Tag.image:
throw new NotImplementedException();
default:
throw new ArgumentOutOfRangeException();
}
if (inlineText != null)
{
inlineText.style.unityFontStyleAndWeight = tag.fontStyle;
if (tag.size > 0)
{
inlineText.style.fontSize = tag.size;
}
if (tag.color != Color.clear)
{
inlineText.style.color = tag.color;
}
results.Add(inlineText);
}
}
}
root = rootTemp;
}
return(results);
/*void RichTextDebug(string richText) => Debug.Log(GetRichTextCapableText(richText));
* string GetRichTextCapableText(string richText) => text.Replace("<", "<<b></b>");*/
}
/// <summary> /// Adds VisualElements corresponding to the provided rich text to a root. /// </summary> /// <param name="text">The rich text to parse</param> /// <param name="buttonRegistry">A registry that can be queried for keys if there are any button tags.</param> /// <param name="root">Visual Element to append the rich text UI to.</param> /// <returns>A list of all immediate children added to the root.</returns> public static List <VisualElement> AddRichText(string text, IButtonRegistry buttonRegistry, VisualElement root) => AddRichText(text, buttonRegistry, root, false);
