namespace Tvl.VisualStudio.Language.Java

{

using System.Collections.Generic;

using System.Runtime.InteropServices;

using Antlr4.Runtime;

using Antlr4.Runtime.Tree;

using Microsoft.VisualStudio.Text;

using Tvl.VisualStudio.Language.Java.Debugger;

using Tvl.VisualStudio.Shell;

using Tvl.VisualStudio.Text;

using IVsEditorAdaptersFactoryService = Microsoft.VisualStudio.Editor.IVsEditorAdaptersFactoryService;

using IVsTextBuffer = Microsoft.VisualStudio.TextManager.Interop.IVsTextBuffer;

using SVsServiceProvider = Microsoft.VisualStudio.Shell.SVsServiceProvider;

using TextSpan = Microsoft.VisualStudio.TextManager.Interop.TextSpan;

using VSConstants = Microsoft.VisualStudio.VSConstants;

[Guid(Constants.JavaLanguageGuidString)]

internal class JavaLanguageInfo : LanguageInfo

{

public JavaLanguageInfo(SVsServiceProvider serviceProvider)

: base(serviceProvider, typeof(JavaLanguageInfo).GUID)

{

}

public override string LanguageName

{

get

{

return Constants.JavaLanguageName;

}

}

public override IEnumerable<string> FileExtensions

{

get

{

yield return Constants.JavaFileExtension;

}

}

public override int ValidateBreakpointLocation(IVsTextBuffer buffer, int line, int col, TextSpan[] pCodeSpan)

{

var componentModel = ServiceProvider.GetComponentModel();

var adapterFactoryService = componentModel.DefaultExportProvider.GetExport<IVsEditorAdaptersFactoryService>();

ITextBuffer textBuffer = adapterFactoryService.Value.GetDataBuffer(buffer);

ITextSnapshot snapshot = textBuffer.CurrentSnapshot;

ITextSnapshotLine snapshotLine = snapshot.GetLineFromLineNumber(line);

string lineText = snapshotLine.GetText();

IList<IParseTree> statementTrees;

IList<IToken> tokens;

if (!LineStatementAnalyzer.TryGetLineStatements(textBuffer, line, out statementTrees, out tokens))

return VSConstants.E_FAIL;

IParseTree tree = null;

for (int i = statementTrees.Count - 1; i >= 0; i--)

{

// want the last tree ending at or after col

IParseTree current = statementTrees[i];

if (current.SourceInterval.Length == 0)

continue;

IToken token = tokens[current.SourceInterval.b];

if (token.Line - 1 < line)

break;

if (token.Line - 1 == line && (token.Column + token.StopIndex - token.StartIndex + 1) < col)

break;

tree = current;

}

if (tree == null)

return VSConstants.E_FAIL;

IToken startToken = tokens[tree.SourceInterval.a];

IToken stopToken = tokens[tree.SourceInterval.b];

pCodeSpan[0].iStartLine = startToken.Line - 1;

pCodeSpan[0].iStartIndex = startToken.Column;

pCodeSpan[0].iEndLine = stopToken.Line - 1;

pCodeSpan[0].iEndIndex = stopToken.Column + stopToken.StopIndex - stopToken.StartIndex + 1;

return VSConstants.S_OK;

}

}

}