示例#1
0
 internal HeightTreeNode(DocumentLine documentLine, double height)
 {
     this.documentLine = documentLine;
     this.totalCount = 1;
     this.lineNode = new HeightTreeLineNode(height);
     this.totalHeight = height;
 }
示例#2
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 internal VisualLine(TextView textView, DocumentLine firstDocumentLine)
 {
     Debug.Assert(textView != null);
     Debug.Assert(firstDocumentLine != null);
     this.textView = textView;
     this.Document = textView.Document;
     this.FirstDocumentLine = firstDocumentLine;
 }
示例#3
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 void ILineTracker.BeforeRemoveLine(DocumentLine line)
 {
     ILineTracker targetTracker = targetObject.Target as ILineTracker;
     if (targetTracker != null)
         targetTracker.BeforeRemoveLine(line);
     else
         Deregister();
 }
示例#4
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 void ILineTracker.LineInserted(DocumentLine insertionPos, DocumentLine newLine)
 {
     ILineTracker targetTracker = targetObject.Target as ILineTracker;
     if (targetTracker != null)
         targetTracker.LineInserted(insertionPos, newLine);
     else
         Deregister();
 }
 internal CollapsedLineSection(HeightTree heightTree, DocumentLine start, DocumentLine end)
 {
     this.heightTree = heightTree;
     this.start = start;
     this.end = end;
     #if DEBUG
     unchecked {
         this.ID = " #" + (nextId++);
     }
     #endif
 }
        /// <inheritdoc cref="IIndentationStrategy.IndentLine"/>
        public override void IndentLine(TextDocument document, DocumentLine line)
        {
            int lineNr = line.LineNumber;
            TextDocumentAccessor acc = new TextDocumentAccessor(document, lineNr, lineNr);
            Indent(acc, false);

            string t = acc.Text;
            if (t.Length == 0) {
                // use AutoIndentation for new lines in comments / verbatim strings.
                base.IndentLine(document, line);
            }
        }
 /// <inheritdoc/>
 public virtual void IndentLine(TextDocument document, DocumentLine line)
 {
     if (document == null)
         throw new ArgumentNullException("document");
     if (line == null)
         throw new ArgumentNullException("line");
     DocumentLine previousLine = line.PreviousLine;
     if (previousLine != null) {
         ISegment indentationSegment = TextUtilities.GetWhitespaceAfter(document, previousLine.Offset);
         string indentation = document.GetText(indentationSegment);
         // copy indentation to line
         indentationSegment = TextUtilities.GetWhitespaceAfter(document, line.Offset);
         document.Replace(indentationSegment, indentation);
     }
 }
示例#8
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 void CheckIsInSection(CollapsedLineSection cs, DocumentLine line)
 {
     HeightTreeNode node = GetNode(line);
     if (node.lineNode.collapsedSections != null && node.lineNode.collapsedSections.Contains(cs))
         return;
     while (node != null) {
         if (node.collapsedSections != null && node.collapsedSections.Contains(cs))
             return;
         node = node.parent;
     }
     throw new InvalidOperationException(cs + " not found for line " + line);
 }
示例#9
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 HeightTreeNode InsertAfter(HeightTreeNode node, DocumentLine newLine)
 {
     HeightTreeNode newNode = new HeightTreeNode(newLine, defaultLineHeight);
     if (node.right == null) {
         if (node.lineNode.collapsedSections != null) {
             // we are inserting directly after node - so copy all collapsedSections
             // that do not end at node.
             foreach (CollapsedLineSection cs in node.lineNode.collapsedSections) {
                 if (cs.End != node.documentLine)
                     newNode.AddDirectlyCollapsed(cs);
             }
         }
         InsertAsRight(node, newNode);
     } else {
         node = node.right.LeftMost;
         if (node.lineNode.collapsedSections != null) {
             // we are inserting directly before node - so copy all collapsedSections
             // that do not start at node.
             foreach (CollapsedLineSection cs in node.lineNode.collapsedSections) {
                 if (cs.Start != node.documentLine)
                     newNode.AddDirectlyCollapsed(cs);
             }
         }
         InsertAsLeft(node, newNode);
     }
     return newNode;
 }
示例#10
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 HeightTreeNode GetNode(DocumentLine ls)
 {
     return GetNodeByIndex(ls.LineNumber - 1);
 }
示例#11
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 void ILineTracker.BeforeRemoveLine(DocumentLine line)
 {
     CheckIsHighlighting();
     int number = line.LineNumber;
     storedSpanStacks.RemoveAt(number);
     isValid.RemoveAt(number);
     if (number < isValid.Count) {
         isValid[number] = false;
         if (number < firstInvalidLine)
             firstInvalidLine = number;
     }
 }
        static void CopyWholeLine(TextArea textArea, DocumentLine line)
        {
            ISegment wholeLine = new SimpleSegment(line.Offset, line.TotalLength);
            string text = textArea.Document.GetText(wholeLine);
            // Ensure we use the appropriate newline sequence for the OS
            text = TextUtilities.NormalizeNewLines(text, Environment.NewLine);
            DataObject data = new DataObject(text);

            // Also copy text in HTML format to clipboard - good for pasting text into Word
            // or to the SharpDevelop forums.
            IHighlighter highlighter = textArea.GetService(typeof(IHighlighter)) as IHighlighter;
            HtmlClipboard.SetHtml(data, HtmlClipboard.CreateHtmlFragment(textArea.Document, highlighter, wholeLine, new HtmlOptions(textArea.Options)));

            MemoryStream lineSelected = new MemoryStream(1);
            lineSelected.WriteByte(1);
            data.SetData(LineSelectedType, lineSelected, false);

            try {
                Clipboard.SetDataObject(data, true);
            } catch (ExternalException) {
                // Apparently this exception sometimes happens randomly.
                // The MS controls just ignore it, so we'll do the same.
                return;
            }
            textArea.OnTextCopied(new TextEventArgs(text));
        }
            protected override void OnHighlightStateChanged(DocumentLine line, int lineNumber)
            {
                base.OnHighlightStateChanged(line, lineNumber);
                if (colorizer.lineNumberBeingColorized != lineNumber) {
                    // Ignore notifications for any line except the one we're interested in.
                    // This improves the performance as Redraw() can take quite some time when called repeatedly
                    // while scanning the document (above the visible area) for highlighting changes.
                    return;
                }
                if (textView.Document != this.Document) {
                    // May happen if document on text view was changed but some user code is still using the
                    // existing IHighlighter instance.
                    return;
                }

                // The user may have inserted "/*" into the current line, and so far only that line got redrawn.
                // So when the highlighting state is changed, we issue a redraw for the line immediately below.
                // If the highlighting state change applies to the lines below, too, the construction of each line
                // will invalidate the next line, and the construction pass will regenerate all lines.

                Debug.WriteLine("OnHighlightStateChanged forces redraw of line " + (lineNumber + 1));

                // If the VisualLine construction is in progress, we have to avoid sending redraw commands for
                // anything above the line currently being constructed.
                // It takes some explanation to see why this cannot happen.
                // VisualLines always get constructed from top to bottom.
                // Each VisualLine construction calls into the highlighter and thus forces an update of the
                // highlighting state for all lines up to the one being constructed.

                // To guarantee that we don't redraw lines we just constructed, we need to show that when
                // a VisualLine is being reused, the highlighting state at that location is still up-to-date.

                // This isn't exactly trivial and the initial implementation was incorrect in the presence of external document changes
                // (e.g. split view).

                // For the first line in the view, the TextView.VisualLineConstructionStarting event is used to check that the
                // highlighting state is up-to-date. If it isn't, this method will be executed, and it'll mark the first line
                // in the view as requiring a redraw. This is safely possible because that event occurs before any lines are reused.

                // Once we take care of the first visual line, we won't get in trouble with other lines due to the top-to-bottom
                // construction process.

                // We'll prove that: if line N is being reused, then the highlighting state is up-to-date until (end of) line N-1.

                // Start of induction: the first line in view is reused only if the highlighting state was up-to-date
                // until line N-1 (no change detected in VisualLineConstructionStarting event).

                // Induction step:
                // If another line N+1 is being reused, then either
                //     a) the previous line (the visual line containing document line N) was newly constructed
                // or  b) the previous line was reused
                // In case a, the construction updated the highlighting state. This means the stack at end of line N is up-to-date.
                // In case b, the highlighting state at N-1 was up-to-date, and the text of line N was not changed.
                //   (if the text was changed, the line could not have been reused).
                // From this follows that the highlighting state at N is still up-to-date.

                // The above proof holds even in the presence of folding: folding only ever hides text in the middle of a visual line.
                // Our Colorize-override ensures that the highlighting state is always updated for the LastDocumentLine,
                // so it will always invalidate the next visual line when a folded line is constructed
                // and the highlighting stack has changed.

                textView.Redraw(line.NextLine, DispatcherPriority.Normal);

                /*
                 * Meta-comment: "why does this have to be so complicated?"
                 *
                 * The problem is that I want to re-highlight only on-demand and incrementally;
                 * and at the same time only repaint changed lines.
                 * So the highlighter and the VisualLine construction both have to run in a single pass.
                 * The highlighter must take care that it never touches already constructed visual lines;
                 * if it detects that something must be redrawn because the highlighting state changed,
                 * it must do so early enough in the construction process.
                 * But doing it too early means it doesn't have the information necessary to re-highlight and redraw only the desired parts.
                 */
            }
示例#14
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 /// <summary>
 /// Is called when the highlighting state at the end of the specified line has changed.
 /// </summary>
 /// <remarks>This callback must not call HighlightLine or InvalidateHighlighting.
 /// It may call GetSpanStack, but only for the changed line and lines above.
 /// This method must not modify the document.</remarks>
 protected virtual void OnHighlightStateChanged(DocumentLine line, int lineNumber)
 {
 }
示例#15
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 void ILineTracker.SetLineLength(DocumentLine line, int newTotalLength)
 {
     ILineTracker targetTracker = targetObject.Target as ILineTracker;
     if (targetTracker != null)
         targetTracker.SetLineLength(line, newTotalLength);
     else
         Deregister();
 }
示例#16
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 public double GetHeight(DocumentLine line)
 {
     return GetNode(line).lineNode.height;
 }
示例#17
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 /// <summary>
 /// Collapses the specified text section.
 /// Runtime: O(log n)
 /// </summary>
 public CollapsedLineSection CollapseText(DocumentLine start, DocumentLine end)
 {
     if (!document.Lines.Contains(start))
         throw new ArgumentException("Line is not part of this document", "start");
     if (!document.Lines.Contains(end))
         throw new ArgumentException("Line is not part of this document", "end");
     int length = end.LineNumber - start.LineNumber + 1;
     if (length < 0)
         throw new ArgumentException("start must be a line before end");
     CollapsedLineSection section = new CollapsedLineSection(this, start, end);
     AddCollapsedSection(section, length);
     #if DEBUG
     CheckProperties();
     #endif
     return section;
 }
示例#18
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        void HighlightLineInternal(DocumentLine line)
        {
            lineStartOffset = line.Offset;
            lineText = document.GetText(line.Offset, line.Length);
            position = 0;
            ResetColorStack();
            HighlightingRuleSet currentRuleSet = this.CurrentRuleSet;
            Stack<Match[]> storedMatchArrays = new Stack<Match[]>();
            Match[] matches = AllocateMatchArray(currentRuleSet.Spans.Count);
            Match endSpanMatch = null;

            while (true) {
                for (int i = 0; i < matches.Length; i++) {
                    if (matches[i] == null || (matches[i].Success && matches[i].Index < position))
                        matches[i] = currentRuleSet.Spans[i].StartExpression.Match(lineText, position);
                }
                if (endSpanMatch == null && !spanStack.IsEmpty)
                    endSpanMatch = spanStack.Peek().EndExpression.Match(lineText, position);

                Match firstMatch = Minimum(matches, endSpanMatch);
                if (firstMatch == null)
                    break;

                HighlightNonSpans(firstMatch.Index);

                Debug.Assert(position == firstMatch.Index);

                if (firstMatch == endSpanMatch) {
                    HighlightingSpan poppedSpan = spanStack.Peek();
                    if (!poppedSpan.SpanColorIncludesEnd)
                        PopColor(); // pop SpanColor
                    PushColor(poppedSpan.EndColor);
                    position = firstMatch.Index + firstMatch.Length;
                    PopColor(); // pop EndColor
                    if (poppedSpan.SpanColorIncludesEnd)
                        PopColor(); // pop SpanColor
                    spanStack = spanStack.Pop();
                    currentRuleSet = this.CurrentRuleSet;
                    //FreeMatchArray(matches);
                    if (storedMatchArrays.Count > 0) {
                        matches = storedMatchArrays.Pop();
                        int index = currentRuleSet.Spans.IndexOf(poppedSpan);
                        Debug.Assert(index >= 0 && index < matches.Length);
                        if (matches[index].Index == position) {
                            throw new InvalidOperationException(
                                "A highlighting span matched 0 characters, which would cause an endless loop.\n" +
                                "Change the highlighting definition so that either the start or the end regex matches at least one character.\n" +
                                "Start regex: " + poppedSpan.StartExpression + "\n" +
                                "End regex: " + poppedSpan.EndExpression);
                        }
                    } else {
                        matches = AllocateMatchArray(currentRuleSet.Spans.Count);
                    }
                } else {
                    int index = Array.IndexOf(matches, firstMatch);
                    Debug.Assert(index >= 0);
                    HighlightingSpan newSpan = currentRuleSet.Spans[index];
                    spanStack = spanStack.Push(newSpan);
                    currentRuleSet = this.CurrentRuleSet;
                    storedMatchArrays.Push(matches);
                    matches = AllocateMatchArray(currentRuleSet.Spans.Count);
                    if (newSpan.SpanColorIncludesStart)
                        PushColor(newSpan.SpanColor);
                    PushColor(newSpan.StartColor);
                    position = firstMatch.Index + firstMatch.Length;
                    PopColor();
                    if (!newSpan.SpanColorIncludesStart)
                        PushColor(newSpan.SpanColor);
                }
                endSpanMatch = null;
            }
            HighlightNonSpans(line.Length);

            PopAllColors();
        }
示例#19
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 void HighlightLineAndUpdateTreeList(DocumentLine line, int lineNumber)
 {
     //Debug.WriteLine("Highlight line " + lineNumber + (highlightedLine != null ? "" : " (span stack only)"));
     spanStack = storedSpanStacks[lineNumber - 1];
     HighlightLineInternal(line);
     if (!EqualSpanStacks(spanStack, storedSpanStacks[lineNumber])) {
         isValid[lineNumber] = true;
         //Debug.WriteLine("Span stack in line " + lineNumber + " changed from " + storedSpanStacks[lineNumber] + " to " + spanStack);
         storedSpanStacks[lineNumber] = spanStack;
         if (lineNumber + 1 < isValid.Count) {
             isValid[lineNumber + 1] = false;
             firstInvalidLine = lineNumber + 1;
         } else {
             firstInvalidLine = int.MaxValue;
         }
         OnHighlightStateChanged(line, lineNumber);
     } else if (firstInvalidLine == lineNumber) {
         isValid[lineNumber] = true;
         firstInvalidLine = isValid.IndexOf(false);
         if (firstInvalidLine < 0)
             firstInvalidLine = int.MaxValue;
     }
 }
示例#20
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 void ILineTracker.LineInserted(DocumentLine insertionPos, DocumentLine newLine)
 {
     CheckIsHighlighting();
     Debug.Assert(insertionPos.LineNumber + 1 == newLine.LineNumber);
     int lineNumber = newLine.LineNumber;
     storedSpanStacks.Insert(lineNumber, null);
     isValid.Insert(lineNumber, false);
     if (lineNumber < firstInvalidLine)
         firstInvalidLine = lineNumber;
 }
示例#21
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 public double GetVisualPosition(DocumentLine line)
 {
     return GetVisualPositionFromNode(GetNode(line));
 }
示例#22
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 void ILineTracker.SetLineLength(DocumentLine line, int newTotalLength)
 {
     CheckIsHighlighting();
     int number = line.LineNumber;
     isValid[number] = false;
     if (number < firstInvalidLine)
         firstInvalidLine = number;
 }
示例#23
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		/// <summary>
		/// Creates a new VisualLineConstructionStartEventArgs instance.
		/// </summary>
		public VisualLineConstructionStartEventArgs(DocumentLine firstLineInView)
		{
			if (firstLineInView == null)
				throw new ArgumentNullException("firstLineInView");
			this.FirstLineInView = firstLineInView;
		}
示例#24
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 void ILineTracker.BeforeRemoveLine(DocumentLine line)
 {
     HeightTreeNode node = GetNode(line);
     if (node.lineNode.collapsedSections != null) {
         foreach (CollapsedLineSection cs in node.lineNode.collapsedSections.ToArray()) {
             if (cs.Start == line && cs.End == line) {
                 cs.Start = null;
                 cs.End = null;
             } else if (cs.Start == line) {
                 Uncollapse(cs);
                 cs.Start = line.NextLine;
                 AddCollapsedSection(cs, cs.End.LineNumber - cs.Start.LineNumber + 1);
             } else if (cs.End == line) {
                 Uncollapse(cs);
                 cs.End = line.PreviousLine;
                 AddCollapsedSection(cs, cs.End.LineNumber - cs.Start.LineNumber + 1);
             }
         }
     }
     BeginRemoval();
     RemoveNode(node);
     // clear collapsedSections from removed line: prevent damage if removed line is in "nodesToCheckForMerging"
     node.lineNode.collapsedSections = null;
     EndRemoval();
 }
 /// <inheritdoc/>
 protected override void ColorizeLine(DocumentLine line)
 {
     IHighlighter highlighter = CurrentContext.TextView.Services.GetService(typeof(IHighlighter)) as IHighlighter;
     if (highlighter != null) {
         lineNumberBeingColorized = line.LineNumber;
         HighlightedLine hl = highlighter.HighlightLine(lineNumberBeingColorized);
         lineNumberBeingColorized = 0;
         foreach (HighlightedSection section in hl.Sections) {
             if (IsEmptyColor(section.Color))
                 continue;
             ChangeLinePart(section.Offset, section.Offset + section.Length,
                            visualLineElement => ApplyColorToElement(visualLineElement, section.Color));
         }
     }
     this.lastColorizedLine = line;
 }
示例#26
0
 //        void ILineTracker.AfterRemoveLine(DocumentLine line)
 //        {
 //
 //        }
 void ILineTracker.LineInserted(DocumentLine insertionPos, DocumentLine newLine)
 {
     InsertAfter(GetNode(insertionPos), newLine);
     #if DEBUG
     CheckProperties();
     #endif
 }
 /// <inheritdoc/>
 protected override void Colorize(ITextRunConstructionContext context)
 {
     this.lastColorizedLine = null;
     base.Colorize(context);
     if (this.lastColorizedLine != context.VisualLine.LastDocumentLine) {
         IHighlighter highlighter = context.TextView.Services.GetService(typeof(IHighlighter)) as IHighlighter;
         if (highlighter != null) {
             // In some cases, it is possible that we didn't highlight the last document line within the visual line
             // (e.g. when the line ends with a fold marker).
             // But even if we didn't highlight it, we'll have to update the highlighting state for it so that the
             // proof inside TextViewDocumentHighlighter.OnHighlightStateChanged holds.
             lineNumberBeingColorized = context.VisualLine.LastDocumentLine.LineNumber;
             highlighter.GetSpanStack(lineNumberBeingColorized);
             lineNumberBeingColorized = 0;
         }
     }
     this.lastColorizedLine = null;
 }
示例#28
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 public void SetHeight(DocumentLine line, double val)
 {
     var node = GetNode(line);
     node.lineNode.height = val;
     UpdateAfterChildrenChange(node);
 }
示例#29
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 void ILineTracker.SetLineLength(DocumentLine ls, int newTotalLength)
 {
 }
示例#30
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 public HighlightedLine HighlightLine(DocumentLine line)
 {
     if (!document.Lines.Contains(line))
         throw new ArgumentException("The specified line does not belong to the document.");
     return HighlightLine(line.LineNumber);
 }