// Token: 0x06007033 RID: 28723 RVA: 0x00203B70 File Offset: 0x00201D70
protected sealed override Size ArrangeOverride(Size arrangeSize)
{
Rect empty = Rect.Empty;
bool flag = false;
Size size = arrangeSize;
if (!this._suspendLayout)
{
TextDpi.SnapToTextDpi(ref size);
if (this.Document != null)
{
this.EnsureFormatter();
if (this._scrollData != null)
{
if (!DoubleUtil.AreClose(this._scrollData.Viewport, size))
{
this._scrollData.Viewport = size;
flag = true;
}
if (!DoubleUtil.AreClose(this._scrollData.Extent, this._formatter.DocumentPage.Size))
{
this._scrollData.Extent = this._formatter.DocumentPage.Size;
flag = true;
if (Math.Abs(this._scrollData.ExtentWidth - this._scrollData.ViewportWidth) < 1.0)
{
this._scrollData.ExtentWidth = this._scrollData.ViewportWidth;
}
if (Math.Abs(this._scrollData.ExtentHeight - this._scrollData.ViewportHeight) < 1.0)
{
this._scrollData.ExtentHeight = this._scrollData.ViewportHeight;
}
}
Vector vector = new Vector(Math.Max(0.0, Math.Min(this._scrollData.ExtentWidth - this._scrollData.ViewportWidth, this._scrollData.HorizontalOffset)), Math.Max(0.0, Math.Min(this._scrollData.ExtentHeight - this._scrollData.ViewportHeight, this._scrollData.VerticalOffset)));
if (!DoubleUtil.AreClose(vector, this._scrollData.Offset))
{
this._scrollData.Offset = vector;
flag = true;
}
if (flag && this._scrollData.ScrollOwner != null)
{
this._scrollData.ScrollOwner.InvalidateScrollInfo();
}
empty = new Rect(this._scrollData.HorizontalOffset, this._scrollData.VerticalOffset, size.Width, size.Height);
}
this._formatter.Arrange(size, empty);
if (this._pageVisual != this._formatter.DocumentPage.Visual)
{
if (this._textView != null)
{
this._textView.OnPageConnected();
}
if (this._pageVisual != null)
{
base.RemoveVisualChild(this._pageVisual);
}
this._pageVisual = (PageVisual)this._formatter.DocumentPage.Visual;
base.AddVisualChild(this._pageVisual);
}
if (this._scrollData != null)
{
this._pageVisual.Offset = new Vector(-this._scrollData.HorizontalOffset, -this._scrollData.VerticalOffset);
}
PtsHelper.UpdateMirroringTransform(base.FlowDirection, FlowDirection.LeftToRight, this._pageVisual, size.Width);
}
else
{
if (this._pageVisual != null)
{
if (this._textView != null)
{
this._textView.OnPageDisconnected();
}
base.RemoveVisualChild(this._pageVisual);
this._pageVisual = null;
}
if (this._scrollData != null)
{
if (!DoubleUtil.AreClose(this._scrollData.Viewport, size))
{
this._scrollData.Viewport = size;
flag = true;
}
if (!DoubleUtil.AreClose(this._scrollData.Extent, default(Size)))
{
this._scrollData.Extent = default(Size);
flag = true;
}
if (!DoubleUtil.AreClose(this._scrollData.Offset, default(Vector)))
{
this._scrollData.Offset = default(Vector);
flag = true;
}
if (flag && this._scrollData.ScrollOwner != null)
{
this._scrollData.ScrollOwner.InvalidateScrollInfo();
}
}
}
}
return(arrangeSize);
}
/// <summary>
/// Content arrangement.
/// </summary>
/// <param name="arrangeSize">Size that element should use to arrange itself and its children.</param>
protected sealed override Size ArrangeOverride(Size arrangeSize)
{
Rect viewport = Rect.Empty;
Vector offset;
bool invalidateScrollInfo = false;
Size safeArrangeSize = arrangeSize;
if (!_suspendLayout)
{
// Convert to TextDpi and convert back to double, to make sure that we are not
// getting rounding errors later.
TextDpi.SnapToTextDpi(ref safeArrangeSize);
if (Document != null)
{
// Create bottomless formatter, if necessary.
EnsureFormatter();
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, _formatter.DocumentPage.Size))
{
_scrollData.Extent = _formatter.DocumentPage.Size;
invalidateScrollInfo = true;
// DocumentPage Size is calculated by converting double to int and then back to double.
// This conversion may produce rounding errors and force us to show scrollbars in cases
// when extent is within 1px from viewport. To workaround this issue, snap extent to viewport
// if we are within 1px range.
if (Math.Abs(_scrollData.ExtentWidth - _scrollData.ViewportWidth) < 1)
{
_scrollData.ExtentWidth = _scrollData.ViewportWidth;
}
if (Math.Abs(_scrollData.ExtentHeight - _scrollData.ViewportHeight) < 1)
{
_scrollData.ExtentHeight = _scrollData.ViewportHeight;
}
}
offset = new Vector(
Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)),
Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset)));
if (!DoubleUtil.AreClose(offset, _scrollData.Offset))
{
_scrollData.Offset = offset;
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
viewport = new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, safeArrangeSize.Width, safeArrangeSize.Height);
}
_formatter.Arrange(safeArrangeSize, viewport);
// Connect to visual tree.
if (_pageVisual != _formatter.DocumentPage.Visual)
{
if (_textView != null)
{
_textView.OnPageConnected();
}
if (_pageVisual != null)
{
RemoveVisualChild(_pageVisual);
}
_pageVisual = (PageVisual)_formatter.DocumentPage.Visual;
AddVisualChild(_pageVisual);
}
// Set appropriate content offset
if (_scrollData != null)
{
_pageVisual.Offset = new Vector(-_scrollData.HorizontalOffset, -_scrollData.VerticalOffset);
}
// DocumentPage.Visual is always returned in LeftToRight FlowDirection.
// Hence, if the the current FlowDirection is RightToLeft,
// mirroring transform need to be applied to the content.
PtsHelper.UpdateMirroringTransform(FlowDirection, FlowDirection.LeftToRight, _pageVisual, safeArrangeSize.Width);
}
else
{
if (_pageVisual != null)
{
if (_textView != null)
{
_textView.OnPageDisconnected();
}
RemoveVisualChild(_pageVisual);
_pageVisual = null;
}
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, new Size()))
{
_scrollData.Extent = new Size();
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Offset, new Vector()))
{
_scrollData.Offset = new Vector();
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
}
}
}
return(arrangeSize);
}