private void CheckScrollPage(ref int valueX, ref int valueY, IntSize charSize)
{
if (scrollPage_Need)
{
valueY = FixScrollY(valueY, charSize);
int pageSizeY = (textAreaHeight - charSize.y) / charSize.y;
Selection selection = lines.LastSelection;
Pos pos = lines.UniversalPosOf(lines.PlaceOf(selection.caret));
pos.ix = selection.wwPreferredPos;
pos.iy += pageSizeY * scrollPage_Pages;
selection.caret = lines.IndexOf(lines.Normalize(lines.UniversalPlaceOf(pos)));
if (!scrollPage_WithSelection)
{
selection.anchor = selection.caret;
}
valueY += pageSizeY * charSize.y * scrollPage_Pages;
scrollPage_Need = false;
scrollPage_Pages = 0;
scrollPage_WithSelection = false;
needScrollToCaret = true;
}
}
private void ValidateSize()
{
if (this.size != null)
{
return;
}
IntSize size = new IntSize(0, 0);
size.y = LinesCount;
for (int i = 0; i < blocksCount; i++)
{
LineBlock block = blocks[i];
if ((block.valid & LineBlock.MaxSizeXValid) == 0)
{
block.valid |= LineBlock.MaxSizeXValid;
block.maxSizeX = 0;
for (int j = 0; j < block.count; j++)
{
int sizeI = block.array[j].Size;
if (block.maxSizeX < sizeI)
{
block.maxSizeX = sizeI;
}
}
}
if (size.x < block.maxSizeX)
{
size.x = block.maxSizeX;
}
}
this.size = size;
}
private void ScrollToCaret(ref int valueX, ref int valueY, IntSize charSize)
{
if (!needScrollToCaret)
{
return;
}
needScrollToCaret = false;
int indentX = charSize.x * scrollingIndent;
int indentY = charSize.y * scrollingIndent;
if (indentX > (textAreaWidth - charSize.x) / 2)
{
indentX = ((textAreaWidth - charSize.x) / (2 * charSize.x)) * charSize.x;
}
if (indentY > (textAreaHeight - charSize.y) / 2)
{
indentY = ((textAreaHeight - charSize.y) / (2 * charSize.y)) * charSize.y;
}
Pos pos = lines.UniversalPosOf(lines.PlaceOf(lines.LastSelection.caret));
int x = pos.ix * charSize.x;
int y = pos.iy * charSize.y;
bool changed = false;
if (valueX > x - indentX)
{
valueX = x - indentX;
changed = true;
}
else if (valueX < x - textAreaWidth + indentX)
{
valueX = x - textAreaWidth + indentX;
changed = true;
}
if (valueY > y - indentY)
{
valueY = y - indentY;
changed = true;
}
else if (valueY < y - textAreaHeight + indentY + charSize.y)
{
valueY = y - textAreaHeight + indentY + charSize.y;
changed = true;
}
if (changed)
{
valueX = CommonHelper.Clamp(valueX, 0, scrollX.contentSize - scrollX.areaSize);
valueY = CommonHelper.Clamp(valueY, 0, scrollY.contentSize - scrollY.areaSize);
}
}
private void CheckScroll(ref int valueX, ref int valueY, IntSize charSize)
{
if (scroll_Need)
{
valueX += scroll_X * charSize.y;
valueY = FixScrollY(valueY, charSize) + scroll_Y * charSize.y;
scroll_Need = false;
scroll_X = 0;
scroll_Y = 0;
}
if (scroll_ValueNeed)
{
valueX = scroll_ValueX;
valueY = FixScrollY(scroll_ValueY, charSize);
scroll_ValueNeed = false;
scroll_ValueX = 0;
scroll_ValueY = 0;
}
}
public void UpdateScrollOnPaint(ScrollOnPaintInfo info, ref int valueX, ref int valueY)
{
int width = info.width;
int height = info.height;
IntSize charSize = info.charSize;
CheckScrollPage(ref valueX, ref valueY, charSize);
CheckScroll(ref valueX, ref valueY, charSize);
if (lines.wordWrap)
{
int vScrollBarValue = FixScrollY(valueY, charSize);
bool needFixByOldLine = vScrollBarValue == FixScrollY(valueY, charSize);
IntSize oldSize = new IntSize(lines.wwSizeX, lines.wwSizeY);
bool showVScrollBar = scrollY.visible;
if (showVScrollBar)
{
textAreaWidth = width - info.leftIndent - info.scrollBarBreadth;
lines.wwValidator.Validate(textAreaWidth / charSize.x);
if (lines.wwSizeY * charSize.y < height)
{
textAreaWidth = width - info.leftIndent;
lines.wwValidator.Validate(textAreaWidth / charSize.x);
showVScrollBar = false;
}
}
else
{
textAreaWidth = width - info.leftIndent;
lines.wwValidator.Validate(textAreaWidth / charSize.x);
if (lines.wwSizeY * charSize.y > height)
{
textAreaWidth = width - info.leftIndent - info.scrollBarBreadth;
lines.wwValidator.Validate(textAreaWidth / charSize.x);
showVScrollBar = true;
}
}
textAreaHeight = height;
scrollX.contentSize = lines.wwSizeX * charSize.x;
scrollX.areaSize = textAreaWidth;
scrollX.visible = false;
scrollY.contentSize = lines.wwSizeY * charSize.y + charSize.y / 2;
scrollY.areaSize = textAreaHeight;
scrollY.visible = showVScrollBar;
textSizeX = lines.wwSizeX;
textSizeY = lines.wwSizeY;
if (oldWWLine != null &&
oldFirstLine != null &&
!object.Equals(new IntSize(lines.wwSizeX, lines.wwSizeY), oldSize) && needFixByOldLine)
{
int wwLine = lines.wwValidator.GetWWILine(oldFirstLine.Value.iLine) + oldFirstLine.Value.iSubline;
int delta = wwLine - oldWWLine.Value;
if (delta != 0)
{
valueY = CommonHelper.Clamp(vScrollBarValue + delta * charSize.y, 0, scrollY.contentSize - scrollY.areaSize);
}
}
}
else
{
IntSize size = lines.Size;
int textWidth = size.x * charSize.x;
int textHeight = size.y * charSize.y;
bool showVScrollBar = textHeight > height;
textAreaWidth = showVScrollBar ? width - info.leftIndent - info.scrollBarBreadth : width - info.leftIndent;
bool showHScrollBar = textWidth > textAreaWidth;
textAreaHeight = showHScrollBar ? height - info.scrollBarBreadth : height;
if (!showVScrollBar && showHScrollBar && textHeight > height - info.scrollBarBreadth)
{
showVScrollBar = true;
textAreaHeight = height - info.scrollBarBreadth;
}
scrollX.contentSize = size.x * charSize.x;
scrollX.areaSize = textAreaWidth;
scrollX.visible = showHScrollBar;
scrollY.contentSize = size.y * charSize.y + charSize.y / 2;
scrollY.areaSize = textAreaHeight;
scrollY.visible = showVScrollBar;
textSizeX = size.x;
textSizeY = size.y;
}
if (needVScrollFix)
{
needVScrollFix = false;
valueY = FixScrollY(valueY, charSize);
}
if (lines.wordWrap)
{
oldWWLine = Math.Max(0, valueY / charSize.y);
oldFirstLine = lines.wwValidator.GetLineIndexOfWW(oldWWLine.Value);
}
ScrollToCaret(ref valueX, ref valueY, charSize);
valueX = scrollX.ClampValue(valueX);
valueY = scrollY.ClampValue(valueY);
scrollX.value = valueX;
scrollY.value = FixScrollY(valueY, charSize);
}
private int FixScrollY(int value, IntSize charSize)
{
return(Convert.ToInt32(Math.Round((float)value / charSize.y) * charSize.y));
}