private void UpdateTextLayout(IDraw sendMe = null)
{
float roX = 0, roY = 0;
Object passageLocker = new Object();
lock (passageLocker)
{
if (sendMe == null)
{
textLayoutNeedsUpdate = true;
Dirty(DisplayRectangle);
return;
}
else
{
textLayoutNeedsUpdate = false;
}
// sort out some settings
data.wrapped = layout == LayoutStyle.WrappedMultiLine;
data.width = PaddedRectangle.width;
data.height = PaddedRectangle.height;
data.valign = (layout == LayoutStyle.OneLine) ? UVAlign.Middle : UVAlign.Top;
bool rev = caretPos > shiftOrigin;
selectRange.start = rev ? shiftOrigin : caretPos;
selectRange.length = Math.Abs(caretPos - shiftOrigin);
// get size of the render
var ti = lastTextInfo = sendMe.uDraw.GetTextInfo(data);
int lines = ti.numLines;
Size tms = ti.minSize;
float lineHeight = tms.height / (float)lines;
// Get Caret location
Point cp = sendMe.uDraw.HitText(caretPos, false, data);
// determine render offset
roX = cp.X > PaddedRectangle.width ? cp.X - PaddedRectangle.width : 0;
roY = cp.Y > PaddedRectangle.height - lineHeight ? cp.Y - PaddedRectangle.height + lineHeight : 0;
float yCenteringOffset = PaddedRectangle.height / 2 - lineHeight / 2;
if (layout == LayoutStyle.OneLine)
{
roY += yCenteringOffset;
}
// set caret line
caret1 = new Point((float)Math.Round(PaddedRectangle.left + cp.X - roX) + 0.5f, (float)Math.Round(PaddedRectangle.top + cp.Y - roY));
caret2 = new Point((float)Math.Round(PaddedRectangle.left + cp.X - roX) + 0.5f, (float)Math.Round(PaddedRectangle.top + cp.Y - roY + lineHeight));
}
}
bool WrappedEndLine(UTextInfo ti, int lineNum)
{
if (ti.lineNewLineLength[lineNum] == 0)
{
// could be last line, could be wrapped
if (ti.numLines == (lineNum + 1))
{
return(false);
}
else
{
return(true);
}
}
return(false);
}
public UTextInfo NewTextInfo(TextLayout textLayout)
{
UTextInfo ret = new UTextInfo();
// get size of the render
float minHeight = 0;
ret.numLines = 0;
ret.lineLengths = new int[textLayout.Metrics.LineCount];
ret.lineNewLineLength = new int[textLayout.Metrics.LineCount];
int i = 0;
foreach (var tlm in textLayout.GetLineMetrics())
{
minHeight += tlm.Height;
ret.numLines++;
ret.lineLengths[i] = tlm.Length;
ret.lineNewLineLength[i] = tlm.NewlineLength;
i++;
}
ret.minSize = new Size(textLayout.DetermineMinWidth(), minHeight);
return(ret);
}
public void KeyDown(Keys key)
{
if (!focusManager.FocusGet(this))
{
return;
}
MKeys(key, true);
if (alt)
{
return;
}
// We dont like \r\n or \r in our text!
data.text = text.Replace("\r\n", "\n").Replace("\r", "\n");
// Copy
if (ctrl && key == Keys.C)
{
String cs = BoundSubString(data.text, caretPos, shiftOrigin);
if (cs != "")
{
SetClip(cs);
}
}
// Cut
if (ctrl && key == Keys.X)
{
String cs = BoundSubString(data.text, caretPos, shiftOrigin);
if (cs != "")
{
SetClip(cs);
}
ReplaceSelectionWithText("");
}
// Paste
if (ctrl && key == Keys.V)
{
ReplaceSelectionWithText(GetClip());
}
// Selcet all
if (ctrl && key == Keys.A)
{
caretPos = data.text.Length;
shiftOrigin = 0;
}
// Backspace
if (key == Keys.Back && caretPos > 0)
{
if (caretPos != shiftOrigin)
{
ReplaceSelectionWithText("");
}
else
{
data.text = data.text.Substring(0, caretPos - 1) + data.text.Substring(caretPos);
caretPos--;
}
}
if (shift && caretPos == shiftOrigin)
{
// cut line
if (key == Keys.Delete)
{
int start, end;
GetLineRange(out start, out end);
String cs = BoundSubString(data.text, start, end);
if (cs != "")
{
SetClip(cs);
}
data.text = data.text.Substring(0, start) + data.text.Substring(end, data.text.Length - end);
caretPos = shiftOrigin = start;
}
// paste line
if (key == Keys.Insert)
{
int lineNum, linePos;
UTextInfo ti = lastTextInfo;
FindMyLine(caretPos, ti.lineLengths, out lineNum, out linePos);
_caretPos = shiftOrigin = caretPos - linePos;
ReplaceSelectionWithText(GetClip().TrimEnd('\r', '\n') + "\n");
}
}
// Delete
else if (key == Keys.Delete && caretPos < data.text.Length && !ctrl)
{
if (caretPos != shiftOrigin)
{
ReplaceSelectionWithText("");
}
else
{
data.text = data.text.Substring(0, caretPos) + data.text.Substring(caretPos + 1);
}
}
if (key == Keys.Left && caretPos > 0)
{
if (ctrl)
{
String lText = data.text.Substring(0, caretPos).Replace("\r", "\n").Replace("\n", " ");
var reg = new Regex(@"\s+");
var mt = reg.Matches(lText);
int cp = 0;
if (mt.Count > 0)
{
cp = mt[mt.Count - 1].Index + mt[mt.Count - 1].Length;
}
if (cp == caretPos)
{
if (mt.Count > 1)
{
cp = caretPos = mt[mt.Count - 2].Index + mt[mt.Count - 2].Length;
}
else
{
cp = 0;
}
}
caretPos = cp;
}
else
{
caretPos--;
}
}
if (key == Keys.Right && caretPos < data.text.Length)
{
if (ctrl)
{
String rText = data.text.Substring(caretPos, data.text.Length - caretPos).Replace("\r", "\n").Replace("\n", " ");
var reg = new Regex(@"\s+");
var mt = reg.Matches(rText);
int cp = 0;
if (mt.Count > 0)
{
cp = mt[0].Index + mt[0].Length;
}
else
{
cp = rText.Length;
}
caretPos += cp;
}
else
{
caretPos++;
}
}
if (key == Keys.Up)
{
if (ctrl)
{
String lText = data.text.Substring(0, caretPos);
var reg = new Regex("[^\n]\n\n+[^\n]", RegexOptions.Multiline);
var mt = reg.Matches(lText);
int cp = 0;
if (mt.Count > 0)
{
cp = mt[mt.Count - 1].Index + mt[mt.Count - 1].Length - 1;
}
if (cp == caretPos)
{
if (mt.Count > 1)
{
cp = mt[mt.Count - 2].Index + mt[mt.Count - 2].Length;
}
else
{
cp = 0;
}
}
caretPos = cp;
}
else
{
int lineNum, linePos;
UTextInfo ti = lastTextInfo;
FindMyLine(caretPos, ti.lineLengths, out lineNum, out linePos);
if (lineNum != 0) // cant go up there!
{
int prevLine = 0;
for (int i = 0; i < lineNum - 1; i++)
{
prevLine += ti.lineLengths[i];
}
int prevLineLen = ti.lineLengths[lineNum - 1] - ti.lineNewLineLength[lineNum - 1];
if (linePos > prevLineLen)
{
linePos = prevLineLen;
}
caretPos = prevLine + linePos;
}
}
}
if (key == Keys.Down)
{
if (ctrl)
{
String rText = data.text.Substring(caretPos, data.text.Length - caretPos);
var reg = new Regex("[^\n]\n\n+[^\n]", RegexOptions.Multiline);
var mt = reg.Matches(rText);
int cp = 0;
if (mt.Count > 0)
{
cp = mt[0].Index + mt[0].Length - 1;
}
else
{
cp = rText.Length;
}
caretPos += cp;
}
else
{
int lineNum, linePos;
UTextInfo ti = lastTextInfo;
FindMyLine(caretPos, ti.lineLengths, out lineNum, out linePos);
if (lineNum != ti.numLines - 1) // cant go down there!
{
int nextLine = 0;
for (int i = 0; i < lineNum + 1; i++)
{
nextLine += ti.lineLengths[i];
}
int nextLineLen = ti.lineLengths[lineNum + 1] - ti.lineNewLineLength[lineNum + 1];
if (linePos > nextLineLen)
{
linePos = nextLineLen;
}
caretPos = nextLine + linePos;
}
}
}
if (key == Keys.End)
{
if (ctrl)
{
caretPos = data.text.Length;
}
else
{
int lineNum, linePos;
UTextInfo ti = lastTextInfo;
FindMyLine(caretPos, ti.lineLengths, out lineNum, out linePos);
int cp = caretPos + ti.lineLengths[lineNum] - linePos - 1;
char c;
while ((c = data.text[cp]) == '\r' || c == '\n')
{
cp--;
}
int el = WrappedEndLine(ti, lineNum) ? 0 : 1;
caretPos = cp + el;
}
}
if (key == Keys.Home)
{
if (ctrl)
{
caretPos = 0;
}
else
{
int lineNum, linePos;
UTextInfo ti = lastTextInfo;
FindMyLine(caretPos, ti.lineLengths, out lineNum, out linePos);
caretPos -= linePos;
}
}
}
