Browse Source
git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/vbnet@5780 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61pull/1/head
Siegfried Pammer
15 years ago
30 changed files with 3228 additions and 2737 deletions
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// <file>
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// <copyright see="prj:///doc/copyright.txt"/>
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// <license see="prj:///doc/license.txt"/>
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// <owner name="Siegfried Pammer" email="siegfriedpammer@gmail.com" />
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// <version>$Revision$</version>
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// </file>
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text.RegularExpressions; |
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using ICSharpCode.Core; |
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using ICSharpCode.NRefactory; |
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using ICSharpCode.NRefactory.Parser; |
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using ICSharpCode.NRefactory.Parser.VB; |
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using ICSharpCode.SharpDevelop.Editor; |
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namespace VBNetBinding |
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{ |
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public class VBNetBracketSearcher : IBracketSearcher |
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{ |
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string openingBrackets = "([{"; |
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string closingBrackets = ")]}"; |
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public BracketSearchResult SearchBracket(IDocument document, int offset) |
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{ |
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if (offset > 0) { |
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char c = document.GetCharAt(offset - 1); |
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int index = openingBrackets.IndexOf(c); |
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int otherOffset = -1; |
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if (index > -1) |
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otherOffset = SearchBracketForward(document, offset, openingBrackets[index], closingBrackets[index]); |
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index = closingBrackets.IndexOf(c); |
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if (index > -1) |
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otherOffset = SearchBracketBackward(document, offset - 2, openingBrackets[index], closingBrackets[index]); |
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if (otherOffset > -1) |
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return new BracketSearchResult(Math.Min(offset - 1, otherOffset), 1, Math.Max(offset - 1, otherOffset), 1); |
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int length; |
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VBStatement statement; |
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int startIndex = FindBeginStatementAroundOffset(document, offset, out statement, out length); |
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int endIndex = 0; |
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if (statement != null) |
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endIndex = FindEndStatement(document, statement); |
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else { |
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endIndex = FindEndStatementAroundOffset(document, offset, out statement); |
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if (statement != null) |
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startIndex = FindBeginStatement(document, statement, document.OffsetToPosition(endIndex), out length); |
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} |
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if (startIndex > -1 && endIndex > -1) |
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return new BracketSearchResult(startIndex, length, endIndex, statement.EndStatement.Length); |
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} |
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return null; |
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} |
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#region bracket search
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int SearchBracketBackward(IDocument document, int offset, char openBracket, char closingBracket) |
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{ |
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bool inString = false; |
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char ch; |
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int brackets = -1; |
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for (int i = offset; i > 0; --i) { |
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ch = document.GetCharAt(i); |
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if (ch == openBracket && !inString) { |
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++brackets; |
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if (brackets == 0) return i; |
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} else if (ch == closingBracket && !inString) { |
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--brackets; |
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} else if (ch == '"') { |
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inString = !inString; |
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} else if (ch == '\n') { |
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int lineStart = ScanLineStart(document, i); |
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if (lineStart >= 0) { // line could have a comment
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inString = false; |
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for (int j = lineStart; j < i; ++j) { |
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ch = document.GetCharAt(j); |
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if (ch == '"') inString = !inString; |
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if (ch == '\'' && !inString) { |
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// comment found!
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// Skip searching in the comment:
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i = j; |
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break; |
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} |
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} |
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} |
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inString = false; |
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} |
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} |
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return -1; |
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} |
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static int ScanLineStart(IDocument document, int offset) |
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{ |
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bool hasComment = false; |
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for (int i = offset - 1; i > 0; --i) { |
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char ch = document.GetCharAt(i); |
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if (ch == '\n') { |
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if (!hasComment) return -1; |
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return i + 1; |
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} else if (ch == '\'') { |
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hasComment = true; |
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} |
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} |
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return 0; |
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} |
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int SearchBracketForward(IDocument document, int offset, char openBracket, char closingBracket) |
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{ |
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bool inString = false; |
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bool inComment = false; |
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int brackets = 1; |
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for (int i = offset; i < document.TextLength; ++i) { |
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char ch = document.GetCharAt(i); |
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if (ch == '\n') { |
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inString = false; |
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inComment = false; |
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} |
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if (inComment) continue; |
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if (ch == '"') inString = !inString; |
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if (inString) continue; |
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if (ch == '\'') { |
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inComment = true; |
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} else if (ch == openBracket) { |
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++brackets; |
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} else if (ch == closingBracket) { |
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--brackets; |
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if (brackets == 0) return i; |
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} |
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} |
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return -1; |
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} |
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#endregion
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#region statement search
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int FindBeginStatementAroundOffset(IDocument document, int offset, out VBStatement statement, out int length) |
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{ |
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length = 0; |
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statement = null; |
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return -1; |
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} |
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int FindEndStatementAroundOffset(IDocument document, int offset, out VBStatement statement) |
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{ |
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IDocumentLine line = document.GetLineForOffset(offset); |
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string interestingText = VBNetFormattingStrategy.TrimLine(line.Text).Trim(' ', '\t'); |
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//LoggingService.Debug("text: '" + interestingText + "'");
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foreach (VBStatement s in VBNetFormattingStrategy.Statements) { |
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Match match = Regex.Matches(interestingText, s.EndRegex, RegexOptions.Singleline | RegexOptions.IgnoreCase).OfType<Match>().FirstOrDefault(); |
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if (match != null) { |
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//LoggingService.DebugFormatted("Found end statement at offset {1}: {0}", s, offset);
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statement = s; |
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int result = match.Index + (line.Length - line.Text.TrimStart(' ', '\t').Length) + line.Offset; |
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if (offset >= result && offset <= (result + match.Length)) |
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return result; |
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} |
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} |
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statement = null; |
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return -1; |
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} |
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int FindBeginStatement(IDocument document, VBStatement statement, Location endLocation, out int length) |
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{ |
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ILexer lexer = ParserFactory.CreateLexer(SupportedLanguage.VBNet, document.CreateReader()); |
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Token currentToken = null; |
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Token prevToken = null; |
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int lookFor = statement.StatementToken; |
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Stack<Token> tokens = new Stack<Token>(); |
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if (statement.EndStatement == "Next") { |
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lookFor = Tokens.For; |
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} |
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Token result = null; |
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while ((currentToken = lexer.NextToken()).Kind != Tokens.EOF) { |
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if (prevToken == null) |
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prevToken = currentToken; |
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if (VBNetFormattingStrategy.IsBlockStart(lexer, currentToken, prevToken)) |
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tokens.Push(currentToken); |
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if (VBNetFormattingStrategy.IsBlockEnd(currentToken, prevToken)) { |
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while (tokens.Count > 0 && !VBNetFormattingStrategy.IsMatchingEnd(tokens.Peek(), currentToken)) |
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tokens.Pop(); |
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if (tokens.Count > 0) { |
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Token t = tokens.Pop(); |
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if (currentToken.Location.Line == endLocation.Line) { |
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result = t; |
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break; |
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} |
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} |
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} |
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prevToken = currentToken; |
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} |
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if (result != null) { |
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IDocumentLine line = document.GetLine(result.Location.Line); |
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string interestingText = VBNetFormattingStrategy.TrimLine(line.Text).Trim(' ', '\t'); |
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//LoggingService.Debug("text2: '" + interestingText + "'");
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Match matchResult = Regex.Match(interestingText, statement.StartRegex, RegexOptions.Singleline | RegexOptions.IgnoreCase); |
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if (matchResult != null) { |
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length = matchResult.Value.TrimEnd(' ', '\t').Length; |
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int diff = line.Length - line.Text.TrimStart(' ', '\t').Length; |
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int start = diff + line.Offset; |
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if (IsDeclaration(result.Kind)) { |
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length += diff + matchResult.Index; |
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return start; |
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} |
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return matchResult.Index + start; |
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} |
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} |
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length = 0; |
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return -1; |
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} |
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int FindEndStatement(IDocument document, VBStatement statement) |
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{ |
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return -1; |
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} |
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#endregion
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bool IsDeclaration(int kind) |
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{ |
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return kind == Tokens.Sub || kind == Tokens.Function || kind == Tokens.Operator || VBNetFormattingStrategy.IsDeclaration(kind); |
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} |
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} |
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} |
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