private void RenderSelection(EditText editText, UIRenderingContext context, int start, int length, Color color, out float offsetTextStart, out float offsetAlignment, out float selectionSize, UIBatch Batch)
{
// calculate the size of the text region by removing padding
var textRegionSize = new Vector2(editText.ActualWidth - editText.Padding.Left - editText.Padding.Right,
editText.ActualHeight - editText.Padding.Top - editText.Padding.Bottom);
var font = editText.Font;
// determine the image to draw in background of the edit text
var fontScale = editText.LayoutingContext.RealVirtualResolutionRatio;
var provider = editText.IsSelectionActive ? editText.ActiveImage : editText.MouseOverState == MouseOverState.MouseOverElement ? editText.MouseOverImage : editText.InactiveImage;
var image = provider?.GetSprite();
var fontSize = new Vector2(fontScale.Y * editText.ActualTextSize);
offsetTextStart = font.MeasureString(editText.TextToDisplay, ref fontSize, start).X;
selectionSize = font.MeasureString(editText.TextToDisplay, ref fontSize, start + length).X - offsetTextStart;
var lineSpacing = font.GetTotalLineSpacing(editText.ActualTextSize);
if (font.FontType == SpriteFontType.Dynamic)
{
offsetTextStart /= fontScale.X;
selectionSize /= fontScale.X;
}
var scaleRatio = editText.ActualTextSize / font.Size;
if (font.FontType != SpriteFontType.Dynamic)
{
offsetTextStart *= scaleRatio;
selectionSize *= scaleRatio;
lineSpacing *= editText.ActualTextSize / font.Size;
}
offsetAlignment = -textRegionSize.X / 2f;
if (editText.TextAlignment != TextAlignment.Left)
{
var textWidth = font.MeasureString(editText.TextToDisplay, ref fontSize).X;
if (font.FontType == SpriteFontType.Dynamic)
{
textWidth /= fontScale.X;
}
else
{
textWidth *= scaleRatio;
}
offsetAlignment = editText.TextAlignment == TextAlignment.Center ? -textWidth / 2 : -textRegionSize.X / 2f + (textRegionSize.X - textWidth);
}
var selectionWorldMatrix = editText.WorldMatrixInternal;
selectionWorldMatrix.M41 += offsetTextStart + selectionSize / 2 + offsetAlignment;
var selectionScaleVector = new Vector3(selectionSize, editText.LineCount * lineSpacing, 0);
Batch.DrawRectangle(ref selectionWorldMatrix, ref selectionScaleVector, ref color, context.DepthBias + 1);
}
public override void RenderColor(UIElement element, UIRenderingContext context, UIBatch Batch)
{
base.RenderColor(element, context, Batch);
var editText = (EditText)element;
if (editText.Font == null)
{
return;
}
// determine the image to draw in background of the edit text
var fontScale = element.LayoutingContext.RealVirtualResolutionRatio;
var color = editText.RenderOpacity * Color.White;
var provider = editText.IsSelectionActive ? editText.ActiveImage : editText.MouseOverState == MouseOverState.MouseOverElement ? editText.MouseOverImage : editText.InactiveImage;
var image = provider?.GetSprite();
if (image?.Texture != null)
{
Batch.DrawImage(image.Texture, ref editText.WorldMatrixInternal, ref image.RegionInternal, ref editText.RenderSizeInternal, ref image.BordersInternal, ref color, context.DepthBias, image.Orientation);
}
// calculate the size of the text region by removing padding
var textRegionSize = new Vector2(editText.ActualWidth - editText.Padding.Left - editText.Padding.Right,
editText.ActualHeight - editText.Padding.Top - editText.Padding.Bottom);
var font = editText.Font;
var caretColor = editText.RenderOpacity * editText.CaretColor;
var offsetTextStart = 0f;
var offsetAlignment = 0f;
var selectionSize = 0f;
// Draw the composition selection
if (editText.Composition.Length > 0)
{
var imeSelectionColor = editText.RenderOpacity * editText.IMESelectionColor;
RenderSelection(editText, context, editText.SelectionStart, editText.Composition.Length, imeSelectionColor, out offsetTextStart, out offsetAlignment, out selectionSize, Batch);
}
// Draw the regular selection
else if (editText.IsSelectionActive)
{
var selectionColor = editText.RenderOpacity * editText.SelectionColor;
RenderSelection(editText, context, editText.SelectionStart, editText.SelectionLength, selectionColor, out offsetTextStart, out offsetAlignment, out selectionSize, Batch);
}
// create the text draw command
var drawCommand = new SpriteFont.InternalUIDrawCommand
{
Color = editText.RenderOpacity * editText.TextColor,
DepthBias = context.DepthBias + 2,
RealVirtualResolutionRatio = fontScale,
RequestedFontSize = editText.ActualTextSize,
Batch = Batch,
SnapText = context.ShouldSnapText && !editText.DoNotSnapText,
Matrix = editText.WorldMatrixInternal,
Alignment = editText.TextAlignment,
TextBoxSize = textRegionSize
};
if (editText.Font.FontType == SpriteFontType.SDF)
{
Batch.End();
Batch.BeginCustom(context.GraphicsContext, 1);
}
// Draw the text
Batch.DrawString(font, editText.TextToDisplay, ref drawCommand);
if (editText.Font.FontType == SpriteFontType.SDF)
{
Batch.End();
Batch.BeginCustom(context.GraphicsContext, 0);
}
// Draw the cursor
if (editText.IsCaretVisible)
{
var lineSpacing = editText.Font.GetTotalLineSpacing(editText.ActualTextSize);
if (editText.Font.FontType != SpriteFontType.Dynamic)
{
lineSpacing *= editText.ActualTextSize / font.Size;
}
var sizeCaret = editText.CaretWidth / fontScale.X;
var caretWorldMatrix = element.WorldMatrixInternal;
caretWorldMatrix.M41 += offsetTextStart + offsetAlignment + (editText.CaretPosition > editText.SelectionStart? selectionSize: 0);
var caretScaleVector = new Vector3(sizeCaret, editText.LineCount * lineSpacing, 0);
Batch.DrawRectangle(ref caretWorldMatrix, ref caretScaleVector, ref caretColor, context.DepthBias + 3);
}
}