/// <summary> /// Content arrangement. /// </summary> /// <param name="finalSize">The final size that element should use to arrange itself and its children.</param> protected override sealed Size ArrangeOverride(Size finalSize) { Transform pageTransform; ScaleTransform pageScaleTransform; Visual pageVisual; Size pageSize, pageZoom; CheckDisposed(); if (_pageVisualClone == null) { if (_pageHost == null) { _pageHost = new DocumentPageHost(); this.AddVisualChild(_pageHost); } Invariant.Assert(_pageHost != null); pageVisual = (_documentPage == null) ? null : _documentPage.Visual; if (pageVisual == null) { // Remove existing visiual children. _pageHost.PageVisual = null; // Reset offset and transform on the page host before Arrange _pageHost.CachedOffset = new Point(); _pageHost.RenderTransform = null; // Size for the page host needs to be set to finalSize _pageHost.Arrange(new Rect(_pageHost.CachedOffset, finalSize)); } else { // Add visual representing the page contents. For performance reasons // first check if it is already insered there. if (_pageHost.PageVisual != pageVisual) { // There might be a case where a visual associated with a page was // inserted to a visual tree before. It got removed later, but GC did not // destroy its parent yet. To workaround this case always check for the parent // of page visual and disconnect it, when necessary. DocumentPageHost.DisconnectPageVisual(pageVisual); _pageHost.PageVisual = pageVisual; } // Compute transform to be applied to the page visual. First take into account // mirroring transform, if necessary. Apply also scaling transform. pageSize = _documentPage.Size; pageTransform = Transform.Identity; // DocumentPage.Visual is always LeftToRight, so if the current // FlowDirection is RightToLeft, need to unmirror the child visual. if (FlowDirection == FlowDirection.RightToLeft) { pageTransform = new MatrixTransform(-1.0, 0.0, 0.0, 1.0, pageSize.Width, 0.0); } // Apply zooming if (!DoubleUtil.IsOne(_pageZoom)) { pageScaleTransform = new ScaleTransform(_pageZoom, _pageZoom); if (pageTransform == Transform.Identity) { pageTransform = pageScaleTransform; } else { pageTransform = new MatrixTransform(pageTransform.Value * pageScaleTransform.Value); } pageSize = new Size(pageSize.Width * _pageZoom, pageSize.Height * _pageZoom); } // Apply stretch properties pageZoom = Viewbox.ComputeScaleFactor(finalSize, pageSize, this.Stretch, this.StretchDirection); if (!DoubleUtil.IsOne(pageZoom.Width) || !DoubleUtil.IsOne(pageZoom.Height)) { pageScaleTransform = new ScaleTransform(pageZoom.Width, pageZoom.Height); if (pageTransform == Transform.Identity) { pageTransform = pageScaleTransform; } else { pageTransform = new MatrixTransform(pageTransform.Value * pageScaleTransform.Value); } pageSize = new Size(pageSize.Width * pageZoom.Width, pageSize.Height * pageZoom.Height); } // Set offset and transform on the page host before Arrange _pageHost.CachedOffset = new Point((finalSize.Width - pageSize.Width) / 2, (finalSize.Height - pageSize.Height) / 2); _pageHost.RenderTransform = pageTransform; // Arrange pagehost to original size of the page. _pageHost.Arrange(new Rect(_pageHost.CachedOffset, _documentPage.Size)); } // Fire sync notification if new page was connected. if (_newPageConnected) { OnPageConnected(); } // Transform for the page has been changed, need to notify TextView about the changes. OnTransformChangedAsync(); } else { if (_pageHost.PageVisual != _pageVisualClone) { // Remove existing visiual children. _pageHost.PageVisual = _pageVisualClone; // Size for the page host needs to be set to finalSize // Use previous offset and transform _pageHost.Arrange(new Rect(_pageHost.CachedOffset, finalSize)); } } return(base.ArrangeOverride(finalSize)); }
/// <summary>Arranges the content to fit a specified view size.</summary> /// <param name="finalSize">The maximum size that the page view should use to arrange itself and its children.</param> /// <returns>The actual size that the page view used to arrange itself and its children.</returns> // Token: 0x06005D78 RID: 23928 RVA: 0x001A4EA8 File Offset: 0x001A30A8 protected sealed override Size ArrangeOverride(Size finalSize) { this.CheckDisposed(); if (this._pageVisualClone == null) { if (this._pageHost == null) { this._pageHost = new DocumentPageHost(); base.AddVisualChild(this._pageHost); } Invariant.Assert(this._pageHost != null); Visual visual = (this._documentPage == null) ? null : this._documentPage.Visual; if (visual == null) { this._pageHost.PageVisual = null; this._pageHost.CachedOffset = default(Point); this._pageHost.RenderTransform = null; this._pageHost.Arrange(new Rect(this._pageHost.CachedOffset, finalSize)); } else { if (this._pageHost.PageVisual != visual) { DocumentPageHost.DisconnectPageVisual(visual); this._pageHost.PageVisual = visual; } Size size = this._documentPage.Size; Transform transform = Transform.Identity; if (base.FlowDirection == FlowDirection.RightToLeft) { transform = new MatrixTransform(-1.0, 0.0, 0.0, 1.0, size.Width, 0.0); } if (!DoubleUtil.IsOne(this._pageZoom)) { ScaleTransform scaleTransform = new ScaleTransform(this._pageZoom, this._pageZoom); if (transform == Transform.Identity) { transform = scaleTransform; } else { transform = new MatrixTransform(transform.Value * scaleTransform.Value); } size = new Size(size.Width * this._pageZoom, size.Height * this._pageZoom); } Size size2 = Viewbox.ComputeScaleFactor(finalSize, size, this.Stretch, this.StretchDirection); if (!DoubleUtil.IsOne(size2.Width) || !DoubleUtil.IsOne(size2.Height)) { ScaleTransform scaleTransform = new ScaleTransform(size2.Width, size2.Height); if (transform == Transform.Identity) { transform = scaleTransform; } else { transform = new MatrixTransform(transform.Value * scaleTransform.Value); } size = new Size(size.Width * size2.Width, size.Height * size2.Height); } this._pageHost.CachedOffset = new Point((finalSize.Width - size.Width) / 2.0, (finalSize.Height - size.Height) / 2.0); this._pageHost.RenderTransform = transform; this._pageHost.Arrange(new Rect(this._pageHost.CachedOffset, this._documentPage.Size)); } if (this._newPageConnected) { this.OnPageConnected(); } this.OnTransformChangedAsync(); } else if (this._pageHost.PageVisual != this._pageVisualClone) { this._pageHost.PageVisual = this._pageVisualClone; this._pageHost.Arrange(new Rect(this._pageHost.CachedOffset, finalSize)); } return(base.ArrangeOverride(finalSize)); }