/// <summary>
/// Get the object, which was inserted under the keyword (line, at offset, with length length),
/// returns null, if no such keyword was inserted.
/// </summary>
public object this[IDocument document, LineSegment line, int offset, int length] {
get {
if(length == 0) {
return null;
}
Node next = root;
int wordOffset = line.Offset + offset;
if (casesensitive) {
for (int i = 0; i < length; ++i) {
int index = ((int)document.GetCharAt(wordOffset + i)) % 256;
next = next.leaf[index];
if (next == null) {
return null;
}
if (next.color != null && TextUtility.RegionMatches(document, wordOffset, length, next.word)) {
return next.color;
}
}
} else {
for (int i = 0; i < length; ++i) {
int index = ((int)Char.ToUpper(document.GetCharAt(wordOffset + i))) % 256;
next = next.leaf[index];
if (next == null) {
return null;
}
if (next.color != null && TextUtility.RegionMatches(document, casesensitive, wordOffset, length, next.word)) {
return next.color;
}
}
}
return null;
}
}
int CreateLines(string text, int insertPosition, int offset)
{
int count = 0;
int start = 0;
ISegment nextDelimiter = NextDelimiter(text, 0);
while (nextDelimiter != null && nextDelimiter.Offset >= 0)
{
int index = nextDelimiter.Offset + (nextDelimiter.Length - 1);
LineSegment newLine = new LineSegment(offset + start, offset + index, nextDelimiter.Length);
markLines.Add(newLine);
if (insertPosition + count >= lineCollection.Count)
{
lineCollection.Add(newLine);
}
else
{
lineCollection.Insert(insertPosition + count, newLine);
}
++count;
start = index + 1;
nextDelimiter = NextDelimiter(text, start);
}
if (start < text.Length)
{
if (insertPosition + count < lineCollection.Count)
{
LineSegment l = (LineSegment)lineCollection[insertPosition + count];
int delta = text.Length - start;
l.Offset -= delta;
l.TotalLength += delta;
}
else
{
LineSegment newLine = new LineSegment(offset + start, text.Length - start);
markLines.Add(newLine);
lineCollection.Add(newLine);
++count;
}
}
OnLineCountChanged(new LineManagerEventArgs(document, insertPosition, count));
return count;
}
int Insert(int lineNumber, int offset, string text)
{
if (text == null || text.Length == 0) {
return 0;
}
textLength += text.Length;
if (lineCollection.Count == 0 || lineNumber >= lineCollection.Count) {
return CreateLines(text, lineCollection.Count, offset);
}
LineSegment line = (LineSegment)lineCollection[lineNumber];
ISegment nextDelimiter = NextDelimiter(text, 0);
if (nextDelimiter == null || nextDelimiter.Offset < 0) {
line.TotalLength += text.Length;
// Console.WriteLine("1:Line length of line {0} set to {1}", lineNumber, line.TotalLength - line.DelimiterLength);
markLines.Add(line);
OnLineLengthChanged(new LineLengthEventArgs(document, lineNumber, offset -line.Offset, text.Length));
return 0;
}
int restLength = line.Offset + line.TotalLength - offset;
if (restLength > 0) {
// Console.WriteLine("Insert: Set restline in line {0} to length {1}", lineNumber, restLength);
LineSegment lineRest = new LineSegment(offset, restLength);
lineRest.DelimiterLength = line.DelimiterLength;
lineRest.Offset += text.Length;
markLines.Add(lineRest);
if (restLength - line.DelimiterLength < 0) {
throw new ApplicationException("tried to insert inside delimiter string " + lineRest.ToString() + "!!!");
}
lineCollection.Insert(lineNumber + 1, lineRest);
OnLineCountChanged(new LineManagerEventArgs(document, lineNumber - 1, 1));
}
line.DelimiterLength = nextDelimiter.Length;
int nextStart = offset + nextDelimiter.Offset + nextDelimiter.Length;
line.TotalLength = nextStart - line.Offset;
// Console.WriteLine("2:Line length of line {0} set to {1}", lineNumber, line.TotalLength - line.DelimiterLength);
markLines.Add(line);
text = text.Substring(nextDelimiter.Offset + nextDelimiter.Length);
return CreateLines(text, lineNumber + 1, nextStart) + 1;
}
/// <remarks>
/// Returns true, if the line lineNumber is empty or filled with whitespaces.
/// </remarks>
public static bool IsEmptyLine(IDocument document, LineSegment line)
{
for (int i = line.Offset; i < line.Offset + line.Length; ++i) {
char ch = document.GetCharAt(i);
if (!Char.IsWhiteSpace(ch)) {
return false;
}
}
return true;
}
void DrawLine(Graphics g, LineSegment line, float yPos, RectangleF margin)
{
float xPos = 0;
float fontHeight = Font.GetHeight(g);
// bool gotNonWhitespace = false;
curTabIndent = 0 ;
foreach (TextWord word in line.Words) {
switch (word.Type) {
case TextWordType.Space:
Advance(ref xPos, ref yPos, margin.Width, textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Tab:
Advance(ref xPos, ref yPos, margin.Width, TabIndent * textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Word:
// if (!gotNonWhitespace) {
// gotNonWhitespace = true;
// curTabIndent += TabIndent * textAreaControl.TextArea.TextView.GetWidth(' ');
// }
g.DrawString(word.Word, word.Font, BrushRegistry.GetBrush(word.Color), xPos + margin.X, yPos);
SizeF drawingSize = g.MeasureString(word.Word, word.Font, new SizeF(margin.Width, fontHeight * 100), printingStringFormat);
Advance(ref xPos, ref yPos, margin.Width, drawingSize.Width, fontHeight);
break;
}
}
}
// Mark document文档中的一行.
bool MarkTokensInLine(IDocument document, int lineNumber, ref bool spanChanged)
{
bool processNextLine = false;
LineSegment previousLine = (lineNumber > 0 ? document.GetLineSegment(lineNumber - 1) : null);
currentSpanStack = ((previousLine != null && previousLine.HighlightSpanStack != null) ? ((Stack)(previousLine.HighlightSpanStack.Clone())) : null);
if (currentSpanStack != null) {
while (currentSpanStack.Count > 0 && ((Span)currentSpanStack.Peek()).StopEOL) {
currentSpanStack.Pop();
}
if (currentSpanStack.Count == 0) {
currentSpanStack = null;
}
}
currentLine = (LineSegment)document.LineSegmentCollection[lineNumber];
if (currentLine.Length == -1) { // happens when buffer is empty !
return false;
}
ArrayList words = ParseLine(document);
if (currentSpanStack != null && currentSpanStack.Count == 0) {
currentSpanStack = null;
}
// Check if the span state has changed, if so we must re-render the next line
// This check may seem utterly complicated but I didn't want to introduce any function calls
// or alllocations here for perf reasons.
if(currentLine.HighlightSpanStack != currentSpanStack) {
if (currentLine.HighlightSpanStack == null) {
processNextLine = false;
foreach (Span sp in currentSpanStack) {
if (!sp.StopEOL) {
spanChanged = true;
processNextLine = true;
break;
}
}
} else if (currentSpanStack == null) {
processNextLine = false;
foreach (Span sp in currentLine.HighlightSpanStack) {
if (!sp.StopEOL) {
spanChanged = true;
processNextLine = true;
break;
}
}
} else {
IEnumerator e1 = currentSpanStack.GetEnumerator();
IEnumerator e2 = currentLine.HighlightSpanStack.GetEnumerator();
bool done = false;
while (!done) {
bool blockSpanIn1 = false;
while (e1.MoveNext()) {
if (!((Span)e1.Current).StopEOL) {
blockSpanIn1 = true;
break;
}
}
bool blockSpanIn2 = false;
while (e2.MoveNext()) {
if (!((Span)e2.Current).StopEOL) {
blockSpanIn2 = true;
break;
}
}
if (blockSpanIn1 || blockSpanIn2) {
if (blockSpanIn1 && blockSpanIn2) {
if (e1.Current != e2.Current) {
done = true;
processNextLine = true;
spanChanged = true;
}
} else {
spanChanged = true;
done = true;
processNextLine = true;
}
} else {
done = true;
processNextLine = false;
}
}
}
} else {
processNextLine = false;
}
//// Alex: remove old words
if (currentLine.Words!=null) currentLine.Words.Clear();
currentLine.Words = words;
currentLine.HighlightSpanStack = (currentSpanStack != null && currentSpanStack.Count > 0) ? currentSpanStack : null;
return processNextLine;
}
float MeasurePrintingHeight(Graphics g, LineSegment line, float maxWidth)
{
float xPos = 0;
float yPos = 0;
float fontHeight = Font.GetHeight(g);
// bool gotNonWhitespace = false;
curTabIndent = 0;
foreach (TextWord word in line.Words) {
switch (word.Type) {
case TextWordType.Space:
Advance(ref xPos, ref yPos, maxWidth, textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Tab:
Advance(ref xPos, ref yPos, maxWidth, TabIndent * textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Word:
// if (!gotNonWhitespace) {
// gotNonWhitespace = true;
// curTabIndent += TabIndent * textAreaControl.TextArea.TextView.GetWidth(' ');
// }
SizeF drawingSize = g.MeasureString(word.Word, word.Font, new SizeF(maxWidth, fontHeight * 100), printingStringFormat);
Advance(ref xPos, ref yPos, maxWidth, drawingSize.Width, fontHeight);
break;
}
}
return yPos + fontHeight;
}
// Mark整个文档.
public void MarkTokens(IDocument document)
{
if (RuleSets.Count == 0) {//如果没有Rule Set则退出,即不给当前文档mark token
return;
}
int lineNumber = 0;//从第一行开始mark token
while (lineNumber < document.TotalNumberOfLines) {//一直循环到最后一行完成后结束,注:最后一行可能只有一个行结束符.
LineSegment previousLine = (lineNumber > 0 ? document.GetLineSegment(lineNumber - 1) : null);
if (lineNumber >= document.LineSegmentCollection.Count) { // may be, if the last line ends with a delimiter
break; // then the last line is not in the LineSegmentCollection :)
}
//当前行中的SpanStack总是获取前面一行中的SpanStack
currentSpanStack = ((previousLine != null && previousLine.HighlightSpanStack != null) ? ((Stack)(previousLine.HighlightSpanStack.Clone())) : null);
if (currentSpanStack != null) {
while (currentSpanStack.Count > 0 && ((Span)currentSpanStack.Peek()).StopEOL)
{
currentSpanStack.Pop();
}
if (currentSpanStack.Count == 0) currentSpanStack = null;
}
currentLine = (LineSegment)document.LineSegmentCollection[lineNumber];
if (currentLine.Length == -1) { // happens when buffer is empty !
return;
}
ArrayList words = ParseLine(document);
if (currentLine.Words!=null) currentLine.Words.Clear();
currentLine.Words = words;
currentLine.HighlightSpanStack = (currentSpanStack==null || currentSpanStack.Count==0) ? null : currentSpanStack;
++lineNumber;
}
document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.WholeTextArea));
document.OnUpdateCommited();
}
HighlightColor GetColor(HighlightRuleSet ruleSet, IDocument document, LineSegment currentSegment, int currentOffset, int currentLength)
{
if (ruleSet != null) {
if (ruleSet.Reference != null) {
return ruleSet.Highlighter.GetColor(document, currentSegment, currentOffset, currentLength);
} else {
return (HighlightColor)ruleSet.KeyWords[document, currentSegment, currentOffset, currentLength];
}
}
return null;
}
public HighlightColor GetColor(IDocument document, LineSegment currentSegment, int currentOffset, int currentLength)
{
//如果不指定RuleSet,则用defaultRuleSet来作为规则集.
return GetColor(defaultRuleSet, document, currentSegment, currentOffset, currentLength);
}
public int GetVisualColumn(LineSegment line, int logicalColumn)
{
int tabIndent = Document.TextEditorProperties.TabIndent;
int column = 0;
for (int i = 0; i < logicalColumn; ++i) {
char ch;
if (i >= line.Length) {
ch = ' ';
} else {
ch = Document.GetCharAt(line.Offset + i);
}
switch (ch) {
case '\t':
int oldColumn = column;
column += tabIndent;
column = (column / tabIndent) * tabIndent;
break;
default:
++column;
break;
}
}
return column;
}
public TextWord(IDocument document, LineSegment line, int offset, int length, HighlightColor highlightColor, bool hasDefaultColor)
{
Debug.Assert(document != null);
Debug.Assert(line != null);
Debug.Assert(highlightColor != null);
this.document = document;
this.line = line;
this.offset = offset;
this.length = length;
this.highlightColor = highlightColor;
this.hasDefaultColor = hasDefaultColor;
}