private int GetMaximumVisibleLineWidth()
{
var max = 0;
using (var graphics = TextArea.CreateGraphics())
{
var firstLine = TextArea.TextView.FirstVisibleLine;
var lastLine =
Document.GetFirstLogicalLine(TextArea.TextView.FirstPhysicalLine + TextArea.TextView.VisibleLineCount);
if (lastLine >= Document.TotalNumberOfLines)
{
lastLine = Document.TotalNumberOfLines - 1;
}
var tabIndent = Document.TextEditorProperties.TabIndent;
var minTabWidth = 4;
var wideSpaceWidth = TextArea.TextView.WideSpaceWidth;
var fontContainer = TextEditorProperties.FontContainer;
for (var lineNumber = firstLine; lineNumber <= lastLine; lineNumber++)
{
var lineSegment = Document.GetLineSegment(lineNumber);
if (Document.FoldingManager.IsLineVisible(lineNumber))
{
var lineWidth = 0;
var words = lineSegment.Words;
var wordCount = words.Count;
var offset = 0;
for (var i = 0; i < wordCount; i++)
{
var word = words[i];
switch (word.Type)
{
case TextWordType.Space:
lineWidth += TextArea.TextView.SpaceWidth;
break;
case TextWordType.Tab:
// go to next tab position
lineWidth = (lineWidth + minTabWidth) / tabIndent / wideSpaceWidth * tabIndent * wideSpaceWidth;
lineWidth += tabIndent * wideSpaceWidth;
break;
case TextWordType.Word:
var text = Document.GetText(offset + lineSegment.Offset, word.Length);
lineWidth += TextArea.TextView.MeasureStringWidth(graphics, text,
word.GetFont(fontContainer) ?? fontContainer.RegularFont);
break;
}
offset += word.Length;
}
max = Math.Max(max, lineWidth);
}
}
}
return(max);
}
