/// <summary>
/// Looks for tab stops in the specified content and returns a processed version with expanded
/// placeholders and tab stops found.
/// </summary>
/// <param name="engine">V8 instance with Emmet engine compiled in it.</param>
/// <param name="content">Expanded abbreviation content.</param>
/// <exception cref="Exception{EmmetEngineExceptionArgs}">
/// Indicates that Emmet engine has failed to parse the specified content.
/// </exception>
public static TabStopsParser ParseContent(V8Engine engine, string content)
{
ObjectHandle tabStopsUtil = engine.DynamicGlobalObject.window.emmet.tabStops;
Handle extractResult = tabStopsUtil.Call("extract", null, engine.CreateValue(content));
if (extractResult.IsError)
{
var ex = new EmmetEngineExceptionArgs(
"Error while trying to extract tab stops.",
extractResult);
throw new Exception <EmmetEngineExceptionArgs>(ex);
}
TabStopsParser retVal = new TabStopsParser();
ObjectHandle tabStopsObj = (ObjectHandle)extractResult;
retVal.Content = tabStopsObj.GetProperty(@"text").AsString;
ObjectHandle tabStopsList = tabStopsObj.GetProperty(@"tabstops");
// Tab stops should be added before modifying document so that editor can track their position.
int tabStopsCount = tabStopsList.ArrayLength;
if (tabStopsCount > 0)
{
retVal.TabStops = new Range[tabStopsCount];
retVal.TabStopGroups = new int[tabStopsCount];
for (int i = 0; i < tabStopsCount; i++)
{
ObjectHandle tabStopObj = tabStopsList.GetProperty(i.ToString());
int start = tabStopObj.GetProperty("start").AsInt32;
int end = tabStopObj.GetProperty("end").AsInt32;
int group = tabStopObj.GetProperty("group").AsInt32;
retVal.TabStops[i] = new Range(start, end);
retVal.TabStopGroups[i] = group;
}
}
return(retVal);
}
/// <summary>
/// Looks for tab stops in the specified content and returns a processed version with expanded
/// placeholders and tab stops found.
/// </summary>
/// <param name="content">Expanded abbreviation content.</param>
/// <param name="offset">(Optional) The offset of the content in containing document.</param>
public static TabStopsParser ParseContent(string content, int offset = 0)
{
var tabStops = new List <Span>(5);
int tabStopOffset = 0;
var retVal = new TabStopsParser();
retVal.Content = Parser.Replace(
content,
(Match m) =>
{
string replacement = m.Groups[1]?.Value ?? string.Empty;
tabStops.Add(new Span(offset + m.Index - tabStopOffset, replacement.Length));
tabStopOffset += m.Length - replacement.Length;
return(replacement);
});
retVal.TabStops = tabStops.ToArray();
return(retVal);
}
/// <summary>
/// Looks for tab stops in the specified content and returns a processed version with expanded
/// placeholders and tab stops found.
/// </summary>
/// <param name="engine">V8 instance with Emmet engine compiled in it.</param>
/// <param name="content">Expanded abbreviation content.</param>
/// <exception cref="Exception{EmmetEngineExceptionArgs}">
/// Indicates that Emmet engine has failed to parse the specified content.
/// </exception>
public static TabStopsParser ParseContent(V8Engine engine, string content)
{
ObjectHandle tabStopsUtil = engine.DynamicGlobalObject.window.emmet.tabStops;
Handle extractResult = tabStopsUtil.Call("extract", null, engine.CreateValue(content));
if (extractResult.IsError)
{
var ex = new EmmetEngineExceptionArgs(
"Error while trying to extract tab stops.",
extractResult);
throw new Exception<EmmetEngineExceptionArgs>(ex);
}
TabStopsParser retVal = new TabStopsParser();
ObjectHandle tabStopsObj = (ObjectHandle)extractResult;
retVal.Content = tabStopsObj.GetProperty(@"text").AsString;
ObjectHandle tabStopsList = tabStopsObj.GetProperty(@"tabstops");
// Tab stops should be added before modifying document so that editor can track their position.
int tabStopsCount = tabStopsList.ArrayLength;
if (tabStopsCount > 0)
{
retVal.TabStops = new Range[tabStopsCount];
retVal.TabStopGroups = new int[tabStopsCount];
for (int i = 0; i < tabStopsCount; i++)
{
ObjectHandle tabStopObj = tabStopsList.GetProperty(i.ToString());
int start = tabStopObj.GetProperty("start").AsInt32;
int end = tabStopObj.GetProperty("end").AsInt32;
int group = tabStopObj.GetProperty("group").AsInt32;
retVal.TabStops[i] = new Range(start, end);
retVal.TabStopGroups[i] = group;
}
}
return retVal;
}
/// <summary>
/// JavaScript callback. Replace editor's content or it's part (from <code>start</code> to
/// <code>end</code> index). If <code>value</code> contains <code>caret_placeholder</code>, the editor
/// will put caret into this position. If you skip <code>start</code> and <code>end</code> arguments,
/// the whole target's content will be replaced with <code>value</code>.
/// If you pass <code>start</code> argument only, the <code>value</code> will be placed at
/// <code>start</code> string index of current content.
/// If you pass <code>start</code> and <code>end</code> arguments, the corresponding substring of
/// current target's content will be replaced with <code>value</code>.
/// </summary>
public InternalHandle ReplaceContent(
V8Engine engine,
bool isConstructCall,
InternalHandle self,
params InternalHandle[] args)
{
string rawContent = args[0].AsString;
int regionStart = args.Length > 1 ? args[1].AsInt32 : -1;
int regionLength = args.Length > 2 ? args[2].AsInt32 - regionStart : 0;
bool indentContent = args.Length == 4 ? args[3].AsBoolean : true;
this.Trace($"Received new content for the editor: {rawContent}");
// Extract tab stops placeholders from the specified content.
var tabStops = TabStopsParser.ParseContent(engine, rawContent);
_editor.ReplaceContentRange(tabStops.Content, regionStart, regionStart + regionLength);
if (null != tabStops.TabStops)
{
Range[] tabStopRanges = tabStops.TabStops;
// Tab stop offsets are relative to the newly generated content ranges, we need to convert
// them to the document-wide offsets.
if (regionStart > 0)
{
tabStopRanges = tabStopRanges.Select(
item => new Range(item.Start + regionStart, item.End + regionStart)).ToArray();
}
_editor.TrackTabStops(tabStopRanges, tabStops.TabStopGroups);
}
if (indentContent)
{
_editor.FormatRegion(regionStart, regionStart + tabStops.Content.Length);
}
return(engine.CreateValue(true));
}
