private unsafe void PaintColoredText(char[] chars, byte[] colors, IntPtr hdc, int rectLeft, int rectRight, int yPos, int startIndex, int endIndex, bool selected)
{
if ((chars == null) || (chars.Length <= 0))
{
this.ColorTable[0].SetupHdc(hdc);
Interop.RECT lpRect = new Interop.RECT(rectLeft, yPos, rectRight, yPos + this._fontHeight);
Interop.ExtTextOutW(hdc, 0, 0, 2, ref lpRect, IntPtr.Zero, 0, null);
}
else
{
// 清空行末空间颜色
if ((endIndex - startIndex) >= 0)
{
Interop.RECT rect = new Interop.RECT(rectLeft + ((endIndex - startIndex) * this._fontWidth), yPos, rectRight, yPos + this._fontHeight);
this.ColorTable[colors[chars.Length]].SetupHdc(hdc);
Interop.ExtTextOutW(hdc, 0, 0, 2, ref rect, IntPtr.Zero, 0, null);
}
// 开始把字符串画到控件上
Interop.RECT textRect = new Interop.RECT(rectLeft, yPos, rectLeft, yPos + this._fontHeight);
int startColumnIndex = startIndex;
int curColumnIndex = startColumnIndex;
int count = 0;
while (startColumnIndex < endIndex)
{
int colorIndex = colors[startColumnIndex];
while ((curColumnIndex < endIndex) && (colors[curColumnIndex] == colorIndex))
{
curColumnIndex++;
}
IntPtr zero = IntPtr.Zero;
try
{
ColorInfo info2 = this.ColorTable[colorIndex];
ColorInfo info3 = info2;
if (selected)
{
if (this._owner.ContainsFocus && (this._owner.ActiveView == this))
{
info2 = this.ColorTable[5];
}
else
{
info2 = this.ColorTable[6];
}
}
if (info3.IsStyledFont)
{
zero = info2.SetupHdc(hdc, this.GetStyledFont(info3.Bold, info3.Italic));
}
else
{
info2.SetupHdc(hdc);
}
count = curColumnIndex - startColumnIndex;
string text = new string(chars, startColumnIndex, count);
Interop.SIZE size = new Interop.SIZE();
bool ret = Interop.GetTextExtentPoint32W(hdc, text, count, ref size);
textRect.left = textRect.right;
textRect.right += size.x ;
fixed (char* chRef = chars)
{
char* chPtr = chRef;
chPtr += startColumnIndex;
Interop.ExtTextOutW(hdc, textRect.left, yPos, 2, ref textRect, (IntPtr) chPtr, count, null);
}
continue;
}
finally
{
startColumnIndex = curColumnIndex;
if (zero != IntPtr.Zero)
{
Interop.SelectObject(hdc, zero);
}
}
}
}
}
private Interop.SIZE MeasureString(IntPtr hdc, char[] chars, int startIndex, int length)
{
Interop.SIZE size = new Interop.SIZE();
if (length > 0)
{
string text = new string(chars, startIndex, length);
bool ret = Interop.GetTextExtentPoint32W(hdc, text, length, ref size);
}
return size;
}
internal void UpdateFont()
{
this._fontPtr = this.Font.ToHfont();
this._styledFontPtrs = null;
Graphics graphics = Graphics.FromHwnd(IntPtr.Zero);
IntPtr hdc = graphics.GetHdc();
Interop.SelectObject(hdc, this._fontPtr);
Interop.SIZE size = new Interop.SIZE();
Interop.GetTextExtentPoint32W(hdc, "O", 1, ref size);
this._fontWidth = size.x;
this._fontHeight = size.y;
graphics.ReleaseHdc(hdc);
if (this.LineNumbersVisible)
{
this._lineNumbersWidth = (this._fontWidth * 5) + 3;
}
this.UpdateLayout();
if (base.IsHandleCreated)
{
bool flag = !this._caretHiding;
this.HideCaret();
if (flag)
{
Interop.DestroyCaret();
this.UpdateCaret();
}
}
base.Invalidate();
}
private Interop.SIZE MeasureString(char[] chars, int startIndex, int length)
{
//NOTE: 使用这种方法的话, 反复选中文本会导致程序崩溃
//IntPtr fontPtr = this.Font.ToHfont();
//Graphics graphics = Graphics.FromHwnd(IntPtr.Zero);
//IntPtr hdc = graphics.GetHdc();
//Interop.SelectObject(hdc, fontPtr);
//Interop.SIZE size = this.MeasureString(hdc, chars, startIndex, length);
//Interop.SelectObject(hdc, IntPtr.Zero);
//graphics.ReleaseHdc(hdc);
//graphics.Dispose();
//return size;
//直接使用Graphics对象的MeasureString就没问题, 但是我觉得效率可能会比较低, 哪位童鞋比较了解这方面的请赐教!!
Graphics g = this.CreateGraphics();
SizeF s = g.MeasureString(new string(chars, startIndex, length), this.Font);
g.Dispose();
Interop.SIZE size = new Interop.SIZE();
size.x = (int)s.Width;
size.y = (int)s.Height;
return size;
}
protected override Size Measure(ElementRenderData renderData)
{
string text = this.Text;
Size empty = Size.Empty;
if (text.Length != 0)
{
if (renderData.AntiAliasedText)
{
return renderData.Graphics.MeasureString(this.Text, renderData.Font, new PointF(0f, 0f), renderData.TextFormat).ToSize();
}
IntPtr graphicsHandle = renderData.GraphicsHandle;
IntPtr hObject = Interop.SelectObject(graphicsHandle, renderData.FontHandle);
try
{
Interop.SIZE size = new Interop.SIZE();
Interop.GetTextExtentPoint32W(graphicsHandle, text, text.Length, ref size);
empty = new Size(size.x, size.y);
}
finally
{
Interop.SelectObject(graphicsHandle, hObject);
}
}
return empty;
}
