document.cxx.svn-base

Notepad++ is a generic source code editor (it tries to be anyway) and Notepad replacement written in

			        LinesTotal() - prevLinesTotal, text));
		}
		enteredModification--;
	}
	return !cb.IsReadOnly();
}

/**
 * Insert a string with a length.
 */
bool Document::InsertString(int position, const char *s, int insertLength) {
	if (insertLength <= 0) {
		return false;
	}
	CheckReadOnly();
	if (enteredModification != 0) {
		return false;
	} else {
		enteredModification++;
		if (!cb.IsReadOnly()) {
			NotifyModified(
			    DocModification(
			        SC_MOD_BEFOREINSERT | SC_PERFORMED_USER,
			        position, insertLength,
			        0, s));
			int prevLinesTotal = LinesTotal();
			bool startSavePoint = cb.IsSavePoint();
			bool startSequence = false;
			const char *text = cb.InsertString(position, s, insertLength, startSequence);
			if (startSavePoint && cb.IsCollectingUndo())
				NotifySavePoint(!startSavePoint);
			ModifiedAt(position);
			NotifyModified(
			    DocModification(
			        SC_MOD_INSERTTEXT | SC_PERFORMED_USER | (startSequence?SC_STARTACTION:0),
			        position, insertLength,
			        LinesTotal() - prevLinesTotal, text));
		}
		enteredModification--;
	}
	return !cb.IsReadOnly();
}

int Document::Undo() {
	int newPos = -1;
	CheckReadOnly();
	if (enteredModification == 0) {
		enteredModification++;
		if (!cb.IsReadOnly()) {
			bool startSavePoint = cb.IsSavePoint();
			bool multiLine = false;
			int steps = cb.StartUndo();
			//Platform::DebugPrintf("Steps=%d\n", steps);
			for (int step = 0; step < steps; step++) {
				const int prevLinesTotal = LinesTotal();
				const Action &action = cb.GetUndoStep();
				if (action.at == removeAction) {
					NotifyModified(DocModification(
									SC_MOD_BEFOREINSERT | SC_PERFORMED_UNDO, action));
				} else {
					NotifyModified(DocModification(
									SC_MOD_BEFOREDELETE | SC_PERFORMED_UNDO, action));
				}
				cb.PerformUndoStep();
				int cellPosition = action.position;
				ModifiedAt(cellPosition);
				newPos = cellPosition;

				int modFlags = SC_PERFORMED_UNDO;
				// With undo, an insertion action becomes a deletion notification
				if (action.at == removeAction) {
					newPos += action.lenData;
					modFlags |= SC_MOD_INSERTTEXT;
				} else {
					modFlags |= SC_MOD_DELETETEXT;
				}
				if (steps > 1)
					modFlags |= SC_MULTISTEPUNDOREDO;
				const int linesAdded = LinesTotal() - prevLinesTotal;
				if (linesAdded != 0)
					multiLine = true;
				if (step == steps - 1) {
					modFlags |= SC_LASTSTEPINUNDOREDO;
					if (multiLine)
						modFlags |= SC_MULTILINEUNDOREDO;
				}
				NotifyModified(DocModification(modFlags, cellPosition, action.lenData,
											   linesAdded, action.data));
			}

			bool endSavePoint = cb.IsSavePoint();
			if (startSavePoint != endSavePoint)
				NotifySavePoint(endSavePoint);
		}
		enteredModification--;
	}
	return newPos;
}

int Document::Redo() {
	int newPos = -1;
	CheckReadOnly();
	if (enteredModification == 0) {
		enteredModification++;
		if (!cb.IsReadOnly()) {
			bool startSavePoint = cb.IsSavePoint();
			bool multiLine = false;
			int steps = cb.StartRedo();
			for (int step = 0; step < steps; step++) {
				const int prevLinesTotal = LinesTotal();
				const Action &action = cb.GetRedoStep();
				if (action.at == insertAction) {
					NotifyModified(DocModification(
									SC_MOD_BEFOREINSERT | SC_PERFORMED_REDO, action));
				} else {
					NotifyModified(DocModification(
									SC_MOD_BEFOREDELETE | SC_PERFORMED_REDO, action));
				}
				cb.PerformRedoStep();
				ModifiedAt(action.position);
				newPos = action.position;

				int modFlags = SC_PERFORMED_REDO;
				if (action.at == insertAction) {
					newPos += action.lenData;
					modFlags |= SC_MOD_INSERTTEXT;
				} else {
					modFlags |= SC_MOD_DELETETEXT;
				}
				if (steps > 1)
					modFlags |= SC_MULTISTEPUNDOREDO;
				const int linesAdded = LinesTotal() - prevLinesTotal;
				if (linesAdded != 0)
					multiLine = true;
				if (step == steps - 1) {
					modFlags |= SC_LASTSTEPINUNDOREDO;
					if (multiLine)
						modFlags |= SC_MULTILINEUNDOREDO;
				}
				NotifyModified(
					DocModification(modFlags, action.position, action.lenData,
									linesAdded, action.data));
			}

			bool endSavePoint = cb.IsSavePoint();
			if (startSavePoint != endSavePoint)
				NotifySavePoint(endSavePoint);
		}
		enteredModification--;
	}
	return newPos;
}

/**
 * Insert a single character.
 */
bool Document::InsertChar(int pos, char ch) {
	char chs[1];
	chs[0] = ch;
	return InsertString(pos, chs, 1);
}

/**
 * Insert a null terminated string.
 */
bool Document::InsertCString(int position, const char *s) {
	return InsertString(position, s, strlen(s));
}

void Document::ChangeChar(int pos, char ch) {
	DeleteChars(pos, 1);
	InsertChar(pos, ch);
}

void Document::DelChar(int pos) {
	DeleteChars(pos, LenChar(pos));
}

void Document::DelCharBack(int pos) {
	if (pos <= 0) {
		return;
	} else if (IsCrLf(pos - 2)) {
		DeleteChars(pos - 2, 2);
	} else if (dbcsCodePage) {
		int startChar = MovePositionOutsideChar(pos - 1, -1, false);
		DeleteChars(startChar, pos - startChar);
	} else {
		DeleteChars(pos - 1, 1);
	}
}

static bool isindentchar(char ch) {
	return (ch == ' ') || (ch == '\t');
}

static int NextTab(int pos, int tabSize) {
	return ((pos / tabSize) + 1) * tabSize;
}

static void CreateIndentation(char *linebuf, int length, int indent, int tabSize, bool insertSpaces) {
	length--;	// ensure space for \0
	if (!insertSpaces) {
		while ((indent >= tabSize) && (length > 0)) {
			*linebuf++ = '\t';
			indent -= tabSize;
			length--;
		}
	}
	while ((indent > 0) && (length > 0)) {
		*linebuf++ = ' ';
		indent--;
		length--;
	}
	*linebuf = '\0';
}

int Document::GetLineIndentation(int line) {
	int indent = 0;
	if ((line >= 0) && (line < LinesTotal())) {
		int lineStart = LineStart(line);
		int length = Length();
		for (int i = lineStart;i < length;i++) {
			char ch = cb.CharAt(i);
			if (ch == ' ')
				indent++;
			else if (ch == '\t')
				indent = NextTab(indent, tabInChars);
			else
				return indent;
		}
	}
	return indent;
}

void Document::SetLineIndentation(int line, int indent) {
	int indentOfLine = GetLineIndentation(line);
	if (indent < 0)
		indent = 0;
	if (indent != indentOfLine) {
		char linebuf[1000];
		CreateIndentation(linebuf, sizeof(linebuf), indent, tabInChars, !useTabs);
		int thisLineStart = LineStart(line);
		int indentPos = GetLineIndentPosition(line);
		BeginUndoAction();
		DeleteChars(thisLineStart, indentPos - thisLineStart);
		InsertCString(thisLineStart, linebuf);
		EndUndoAction();
	}
}

int Document::GetLineIndentPosition(int line) {
	if (line < 0)
		return 0;
	int pos = LineStart(line);
	int length = Length();
	while ((pos < length) && isindentchar(cb.CharAt(pos))) {
		pos++;
	}
	return pos;
}

int Document::GetColumn(int pos) {
	int column = 0;
	int line = LineFromPosition(pos);
	if ((line >= 0) && (line < LinesTotal())) {
		for (int i = LineStart(line);i < pos;) {
			char ch = cb.CharAt(i);
			if (ch == '\t') {
				column = NextTab(column, tabInChars);
				i++;
			} else if (ch == '\r') {
				return column;
			} else if (ch == '\n') {
				return column;
			} else if (i >= Length()) {
				return column;
			} else {
				column++;
				i = MovePositionOutsideChar(i + 1, 1, false);
			}
		}
	}
	return column;
}

int Document::FindColumn(int line, int column) {
	int position = LineStart(line);
	int columnCurrent = 0;
	if ((line >= 0) && (line < LinesTotal())) {
		while ((columnCurrent < column) && (position < Length())) {
			char ch = cb.CharAt(position);
			if (ch == '\t') {
				columnCurrent = NextTab(columnCurrent, tabInChars);
				position++;
			} else if (ch == '\r') {
				return position;
			} else if (ch == '\n') {
				return position;
			} else {
				columnCurrent++;
				position = MovePositionOutsideChar(position + 1, 1, false);
			}
		}
	}
	return position;
}

void Document::Indent(bool forwards, int lineBottom, int lineTop) {
	// Dedent - suck white space off the front of the line to dedent by equivalent of a tab
	for (int line = lineBottom; line >= lineTop; line--) {
		int indentOfLine = GetLineIndentation(line);
		if (forwards) {
			if (LineStart(line) < LineEnd(line)) {
				SetLineIndentation(line, indentOfLine + IndentSize());
			}
		} else {
			SetLineIndentation(line, indentOfLine - IndentSize());
		}
	}
}

// Convert line endings for a piece of text to a particular mode.
// Stop at len or when a NUL is found.
// Caller must delete the returned pointer.
char *Document::TransformLineEnds(int *pLenOut, const char *s, size_t len, int eolMode) {
	char *dest = new char[2 * len + 1];
	const char *sptr = s;
	char *dptr = dest;
	for (size_t i = 0; (i < len) && (*sptr != '\0'); i++) {
		if (*sptr == '\n' || *sptr == '\r') {
			if (eolMode == SC_EOL_CR) {
				*dptr++ = '\r';
			} else if (eolMode == SC_EOL_LF) {
				*dptr++ = '\n';
			} else { // eolMode == SC_EOL_CRLF
				*dptr++ = '\r';
				*dptr++ = '\n';
			}
			if ((*sptr == '\r') && (i+1 < len) && (*(sptr+1) == '\n')) {
				i++;
				sptr++;
			}
			sptr++;
		} else {
			*dptr++ = *sptr++;
		}
	}
	*dptr++ = '\0';
	*pLenOut = (dptr - dest) - 1;
	return dest;
}

void Document::ConvertLineEnds(int eolModeSet) {
	BeginUndoAction();

	for (int pos = 0; pos < Length(); pos++) {
		if (cb.CharAt(pos) == '\r') {
			if (cb.CharAt(pos + 1) == '\n') {
				// CRLF
				if (eolModeSet == SC_EOL_CR) {
					DeleteChars(pos + 1, 1); // Delete the LF
				} else if (eolModeSet == SC_EOL_LF) {
					DeleteChars(pos, 1); // Delete the CR
				} else {
					pos++;
				}
			} else {
				// CR
				if (eolModeSet == SC_EOL_CRLF) {
					InsertString(pos + 1, "\n", 1); // Insert LF
					pos++;
				} else if (eolModeSet == SC_EOL_LF) {
					InsertString(pos, "\n", 1); // Insert LF
					DeleteChars(pos + 1, 1); // Delete CR
				}
			}
		} else if (cb.CharAt(pos) == '\n') {
			// LF
			if (eolModeSet == SC_EOL_CRLF) {
				InsertString(pos, "\r", 1); // Insert CR
				pos++;
			} else if (eolModeSet == SC_EOL_CR) {
				InsertString(pos, "\r", 1); // Insert CR
				DeleteChars(pos + 1, 1); // Delete LF
			}
		}
	}

	EndUndoAction();
}

bool Document::IsWhiteLine(int line) {
	int currentChar = LineStart(line);
	int endLine = LineEnd(line);
	while (currentChar < endLine) {
		if (cb.CharAt(currentChar) != ' ' && cb.CharAt(currentChar) != '\t') {
			return false;
		}
		++currentChar;
	}
	return true;
}

int Document::ParaUp(int pos) {
	int line = LineFromPosition(pos);
	line--;
	while (line >= 0 && IsWhiteLine(line)) { // skip empty lines
		line--;
	}
	while (line >= 0 && !IsWhiteLine(line)) { // skip non-empty lines
		line--;
	}
	line++;
	return LineStart(line);
}

int Document::ParaDown(int pos) {
	int line = LineFromPosition(pos);
	while (line < LinesTotal() && !IsWhiteLine(line)) { // skip non-empty lines
		line++;
	}
	while (line < LinesTotal() && IsWhiteLine(line)) { // skip empty lines
		line++;
	}
	if (line < LinesTotal())
		return LineStart(line);
	else // end of a document
		return LineEnd(line-1);
}

CharClassify::cc Document::WordCharClass(unsigned char ch) {
	if ((SC_CP_UTF8 == dbcsCodePage) && (ch >= 0x80))