SharpDevelop研究笔记

public virtual int SearchBracketBackward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            int brackets = -1;
            // first try "quick find" - find the matching bracket if there is no string/comment in the way
            for (int i = offset; i > 0; --i) {
                char ch = document.GetCharAt(i);
                if (ch == openBracket) {
                    ++brackets;
                    if (brackets == 0) return i;
                } else if (ch == closingBracket) {
                    --brackets;
                //} else if (ch == '"') {
                //    break;
                //} else if (ch == '\'') {
                //    break;
                //} else if (ch == '/' && i > 0) {
                //    if (document.GetCharAt(i - 1) == '/') break;
                //    if (document.GetCharAt(i - 1) == '*') break;
                }
            }
            return -1;
        }
        
        public virtual int SearchBracketForward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            int brackets = 1;
            // try "quick find" - find the matching bracket if there is no string/comment in the way
            for (int i = offset; i < document.TextLength; ++i) {
                char ch = document.GetCharAt(i);
                if (ch == openBracket) {
                    ++brackets;
                } else if (ch == closingBracket) {
                    --brackets;
                    if (brackets == 0) return i;
                //} else if (ch == '"') {
                //    break;
                //} else if (ch == '\'') {
                //    break;
                //} else if (ch == '/' && i > 0) {
                //    if (document.GetCharAt(i - 1) == '/') break;
                //} else if (ch == '*' && i > 0) {
                //    if (document.GetCharAt(i - 1) == '/') break;
                }
            }
            return -1;
        }

ICSharpCode:Gui/TextEditor中

括号匹配在何处被定义和捕捉更新？奇怪的是如果加了//或者/*就会失效，所以把上面的注示掉
答：TextArea.cs中的List<BracketHighlightingSheme> bracketshemes  = new List<BracketHighlightingSheme>();变量存储在查找的匹配 项，SearchMatchingBracket()方法中搜索并更新匹配项的显示

代码在Document/FormattingStrategy下

后来想想也有道理，因为注示掉的文字，可能也有括号，这样匹配项就不对了，这里还有修改的空间?????

在4.30的源码里找到了如下段，可是已经给注示掉了，不过证明了原来的两段是不合理的！

 

int DoQuickFindBackward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            int brackets = -1;
            // first try "quick find" - find the matching bracket if there is no string/comment in the way
            for (int i = offset; i >= 0; --i) {
                char ch = document.GetCharAt(i);
                if (ch == openBracket) {
                    ++brackets;
                    if (brackets == 0) return i;
                } else if (ch == closingBracket) {
                    --brackets;
                } else if (ch == '"') {
                    break;
                } else if (ch == '#') {
                    break;
                } else if (ch == '\'') {
                    break;
                } else if (ch == '/' && i > 0) {
                    if (document.GetCharAt(i - 1) == '/') break;
                    if (document.GetCharAt(i - 1) == '*') break;
                }
            }
            return -1;
        }
        
        int DoQuickFindForward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            int brackets = 1;
            // try "quick find" - find the matching bracket if there is no string/comment in the way
            for (int i = offset; i < document.TextLength; ++i) {
                char ch = document.GetCharAt(i);
                if (ch == openBracket) {
                    ++brackets;
                } else if (ch == closingBracket) {
                    --brackets;
                    if (brackets == 0) return i;
                } else if (ch == '"') {
                    break;
                } else if (ch == '#') {
                    break;
                } else if (ch == '\'') {
                    break;
                } else if (ch == '/' && i > 0) {
                    if (document.GetCharAt(i - 1) == '/') break;
                } else if (ch == '*' && i > 0) {
                    if (document.GetCharAt(i - 1) == '/') break;
                }
            }
            return -1;
        }
        
        public override int SearchBracketBackward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            // Implemented Boo specific "quick find" of brackets
            // needed because of "#" --> comment character
            int quickFind = DoQuickFindBackward(document, offset, openBracket, closingBracket);
            if (quickFind >= 0)
                return quickFind;
            
            // Same as with C# - can not parse a boo file backwards
            // -> all brackets from the beginning are put on a stack
            
            bool inSingleComment = false;
            int multiCommentLevel = 0; // Boo has nested multiline comments
            bool inMultiString = false;
            bool inSingleString = false;
            bool inSingleString2 = false; // ' ... ' strings
            Stack<int> bracketStack = new Stack<int>();
            
            if (document.TextContent.StartsWith("//")) {
                inSingleComment = true;
            }
            
            for (int position = 0; position <= offset; ++position) {
                try {
                    char ch = document.GetCharAt(position);
                    
                    if (ch == openBracket) {
                        if (!(inSingleString || inSingleString2 || inMultiString || inSingleComment || (multiCommentLevel != 0))) {
                            bracketStack.Push(position);
                        }
                    } else {
                        if (ch == closingBracket) {
                            if (!(inSingleString || inSingleString2 || inMultiString || inSingleComment || (multiCommentLevel != 0))) {
                                if (bracketStack.Count > 0) {
                                    bracketStack.Pop();
                                }
                            }
                        } else {
                            switch (ch) {
                                case '/':
                                    if (!(inMultiString || inSingleString2 || inSingleString || inSingleComment)) {
                                        if (document.GetCharAt(position + 1) == '*') {
                                            multiCommentLevel++;
                                        }
                                        if (document.GetCharAt(position + 1) == '/') {
                                            inSingleComment = true;
                                        }
                                        if (document.GetCharAt(position - 1) == '*') {
                                            multiCommentLevel--;
                                        }
                                    }
                                    break;
                                case '#':
                                    if (!inMultiString && !inSingleString && !inSingleString2)
                                        inSingleComment = true;
                                    break;
                                case '\n':
                                    if (!inMultiString && !inSingleString && !inSingleString2)
                                        inSingleComment = false;
                                    break;
                                case '"':
                                    if (IsMultilineString(document, position)) {
                                        position += 2;
                                        inMultiString = !inMultiString;
                                    } else {
                                        if (!inMultiString && !inSingleString2) {
                                            inSingleString = !inSingleString;
                                        }
                                    }
                                    break;
                                case '\'':
                                    if (!inMultiString && !inSingleString2) {
                                        inSingleString2 = !inSingleString2;
                                    }
                                    break;
                                case '\\':
                                    if (!inMultiString)
                                        position++;
                                    break;
                            }
                        }
                    }
                } catch (ArgumentOutOfRangeException) {
                    break;
                }
            }
            
            if (bracketStack.Count > 0)
                return bracketStack.Pop();
            
            return -1;
        }
        
        bool IsMultilineString(IDocument document, int offset)
        {
            if (offset + 2 >= document.TextLength)
                return false;
            
            if ((document.GetCharAt(offset) == document.GetCharAt(offset + 1))
                && (document.GetCharAt(offset) == document.GetCharAt(offset + 2))) {
                return true;
            }
            
            return false;
        }
        
        public override int SearchBracketForward(IDocument document, int offset, char openBracket, char closingBracket)
        {
            // Implemented Boo specific "quick find" of brackets
            // needed because of "#" --> comment character
            int quickFind = DoQuickFindForward(document, offset, openBracket, closingBracket);
            if (quickFind >= 0)
                return quickFind;
            
            int brackets = 1;
            bool inSingleComment = false;
            int multiCommentLevel = 0;
            bool inMultiString = false;
            bool inSingleString = false;
            
            while (offset < document.TextLength) {
                char ch = document.GetCharAt(offset);
                
                if (ch == openBracket) {
                    if (!(inSingleString || inMultiString || inSingleComment || (multiCommentLevel != 0))) {
                        brackets++;
                    }
                } else {
                    if (ch == closingBracket) {
                        if (!(inSingleString || inMultiString || inSingleComment || (multiCommentLevel != 0))) {
                            brackets--;
                            if (brackets == 0) return offset;
                        }
                    } else {
                        switch (ch) {
                            case '/':
                                if (!inMultiString && !inSingleString) {
                                    if (offset + 1 < document.TextLength) {
                                        if (document.GetCharAt(offset + 1) == '*') {
                                            multiCommentLevel++;
                                        } else if (document.GetCharAt(offset + 1) == '/') {
                                            inSingleComment = true;
                                        }
                                    }
                                }
                                break;
                            case '*':
                                if (!inMultiString && !inSingleString) {
                                    if (offset + 1 < document.TextLength && document.GetCharAt(offset + 1) == '/') {
                                        multiCommentLevel--;
                                    }
                                }
                                break;
                            case '#':
                                if (!inMultiString && !inSingleString)
                                    inSingleComment = true;
                                break;
                            case '\n':
                                if (!inMultiString && !inSingleString)
                                    inSingleComment = false;
                                break;
                            case '"':
                                if (IsMultilineString(document, offset)) {

                                    offset += 2;
                                    inMultiString = !inMultiString;
                                } else {
                                    if (!inMultiString) {
                                        inSingleString = !inSingleString;
                                    }
                                }
                                break;
                            case '\\':
                                if (!inMultiString)
                                    offset++;
                                break;
                        }
                    }
                }
                offset++;
            }
            
            return -1;
        }