public static Font get(Style style)
{
Font font;
if (!fontCache.TryGetValue(uidOf(style), out font))
{
fontCache[uidOf(style)] = font = createFont(style);
}
return font;
}
protected Document()
{
rows = new DocumentRowCollection();
style = new Style
{
FontName = Control.DefaultFont.Name,
FontHeight = Control.DefaultFont.SizeInPoints,
Foreground = Color.Black,
Background = Color.White
};
}
internal DocumentView(DocumentViewSurface surface)
{
this.surface = surface;
renderStuff = new RenderStuff(this);
trace = new ViewControlTrace(this);
keyActionMap = new KeyActionMap();
renderList = new Dictionary<int, DocumentRowView>();
createKeyCommands();
ClearStuff();
selectionStyle = new Style
{
Foreground = Color.White,
Background = Color.Blue
};
viewStyle = new ViewStyle();
}
public virtual Style Combine(Style style)
{
var result = new Style
{
FontHeight = FontHeight,
FontName = FontName,
Foreground = Foreground,
Background = Background
};
if (style.FontName != null)
result.FontName = style.FontName;
if (style.FontHeight > 0)
result.FontHeight = style.FontHeight;
if (!style.Foreground.IsEmpty)
result.Foreground = style.Foreground;
if (!style.Background.IsEmpty)
result.Background = style.Background;
result.FontStyle |= style.FontStyle;
return result;
}
public Face(string name, IStylizer owner)
{
this.name = name;
this.owner = owner;
faceStyle = new Style();
}
public StylizedRowElement(CharacterRange range, Style style)
{
this.range = range;
this.style = style;
}
private static Font createFont(Style style)
{
return new Font(style.FontName, style.FontHeight, style.FontStyle);
}
private static string uidOf(Style style)
{
return style.FontName + ", "
+ style.FontHeight + "pt, "
+ style.FontStyle;
}
private RectangleF MeasureStringPart(CharacterRange range, string str, Style style)
{
return MeasureStringPart(range, surface.Graphics, str, style);
}
private RectangleF MeasureStringPart(CharacterRange range, Graphics g, string str, Style style)
{
if (range.Length == 0)
return RectangleF.Empty;
return MeasureStringParts(new[] { range }, g, str, style)[0];
}
private RectangleF[] MeasureStringParts(CharacterRange[] range, Graphics g, string str, Style style)
{
UpdateTabStop(str, style);
stringFormat.SetMeasurableCharacterRanges(range);
Region[] regn = g.MeasureCharacterRanges(str, FontCache.get(style),
RectangleF.Empty, stringFormat);
return Array.ConvertAll(regn, rgn => rgn.GetBounds(g));
}
private void UpdateTabStop(string str, Style style)
{
var tabCount = countTabs(str);
if (tabCount <= 0)
{
return;
}
var tabString = new string(' ', ViewStyle.TabSize);
var tabSize = surface.Graphics.MeasureString(tabString, FontCache.get(style), 0, stringFormat);
stringFormat.SetTabStops(0, new[] { tabSize.Width });
}
private RectangleF DrawStringPart(CharacterRange range, Graphics g, string str, Style style, float offset)
{
string part = str.Substring(range.First, range.Length);
UpdateTabStop(part, style);
RectangleF size = MeasureStringPart(range, g, str, style);
if (!style.Background.IsEmpty)
{
RectangleF textRect = size;
textRect.X = 0;
textRect.Offset(offset, 0);
g.FillRectangle(BrushCache.getSolid(style.Background), textRect);
}
g.DrawString(part, FontCache.get(style), BrushCache.getForeground(style), offset, 0, stringFormat);
return size;
}
private int drawCursor(int cursor, CharacterRange part, float offset, Graphics g, string atomRaw, Style thisStyle)
{
if (cursor < 0 || cursor >= part.Length)
return part.Length;
renderStuff.caretRect = MeasureStringPart(new CharacterRange(cursor, 1), g, atomRaw, thisStyle);
var caretRect = renderStuff.caretRect;
caretRect.Offset(offset, 0);
var pen = PenCache.GetSolid(Color.Black);
pen.Width = 2;
g.DrawLine(pen, caretRect.Left, caretRect.Top, caretRect.Left, caretRect.Bottom);
return part.Length;
}
public static Brush getForeground(Style style)
{
return getSolid(style.Foreground);
}
