/// <summary>
/// Formats an inline instance with shadow properties.
/// </summary>
/// <param name="textNode">The text shadow node.</param>
/// <param name="inline">The inline.</param>
protected static void FormatInline(ReactTextInputShadowNode textNode, TextElement inline)
{
if (textNode._fontSize != Unset)
{
var fontSize = textNode._fontSize;
inline.FontSize = fontSize;
}
if (textNode._fontStyle.HasValue)
{
var fontStyle = textNode._fontStyle.Value;
inline.FontStyle = fontStyle;
}
if (textNode._fontWeight.HasValue)
{
var fontWeight = textNode._fontWeight.Value;
inline.FontWeight = fontWeight;
}
if (textNode._fontFamily != null)
{
var fontFamily = new FontFamily(textNode._fontFamily);
inline.FontFamily = fontFamily;
}
}
private static void ApplyStyles(ReactTextInputShadowNode textNode, TextBlock textBlock)
{
if (textNode._fontSize != Unset)
{
var fontSize = textNode._fontSize;
textBlock.FontSize = fontSize;
}
if (textNode._fontStyle.HasValue)
{
var fontStyle = textNode._fontStyle.Value;
textBlock.FontStyle = fontStyle;
}
if (textNode._fontWeight.HasValue)
{
var fontWeight = textNode._fontWeight.Value;
textBlock.FontWeight = fontWeight;
}
if (textNode._fontFamily != null)
{
var fontFamily = new FontFamily(textNode._fontFamily);
textBlock.FontFamily = fontFamily;
}
if (textNode._maxHeight.HasValue)
{
textBlock.MaxHeight = textNode._maxHeight.Value;
}
}
private static YogaSize MeasureTextInput(ReactTextInputShadowNode textInputNode, YogaNode node, float width, YogaMeasureMode widthMode, float height, YogaMeasureMode heightMode)
{
textInputNode._computedPadding = textInputNode.GetComputedPadding();
var normalizedWidth = Math.Max(0,
(YogaConstants.IsUndefined(width) ? double.PositiveInfinity : width));
var normalizedHeight = Math.Max(0,
(YogaConstants.IsUndefined(height) ? double.PositiveInfinity : height));
var normalizedText = string.IsNullOrEmpty(textInputNode._text) ? " " : textInputNode._text;
var textBlock = new TextBlock
{
Text = normalizedText,
TextWrapping = textInputNode._multiline ? TextWrapping.Wrap : TextWrapping.NoWrap,
};
ApplyStyles(textInputNode, textBlock);
textBlock.Measure(new Size(normalizedWidth, normalizedHeight));
return(MeasureOutput.Make(
(float)Math.Ceiling(width),
(float)Math.Ceiling(textBlock.ActualHeight)));
}
private static YogaSize MeasureTextInput(ReactTextInputShadowNode textInputNode, YogaNode node, float width, YogaMeasureMode widthMode, float height, YogaMeasureMode heightMode)
{
textInputNode._computedPadding = textInputNode.GetComputedPadding();
var borderLeftWidth = textInputNode.GetBorder(YogaEdge.Left);
var borderRightWidth = textInputNode.GetBorder(YogaEdge.Right);
var normalizedWidth = Math.Max(0,
(YogaConstants.IsUndefined(width) ? double.PositiveInfinity : width)
- textInputNode._computedPadding[0]
- textInputNode._computedPadding[2]
- (YogaConstants.IsUndefined(borderLeftWidth) ? 0 : borderLeftWidth)
- (YogaConstants.IsUndefined(borderRightWidth) ? 0 : borderRightWidth));
var normalizedHeight = Math.Max(0, YogaConstants.IsUndefined(height) ? double.PositiveInfinity : height);
// This is not a terribly efficient way of projecting the height of
// the text elements. It requires that we have access to the
// dispatcher in order to do measurement, which, for obvious
// reasons, can cause perceived performance issues as it will block
// the UI thread from handling other work.
//
// TODO: determine another way to measure text elements.
var task = DispatcherHelpers.CallOnDispatcher(() =>
{
/*
* var textBlock = new TextBlock
* {
* TextWrapping = TextWrapping.Wrap,
* };
*
* var normalizedText = string.IsNullOrEmpty(textNode._text) ? " " : textNode._text;
* var inline = new Run { Text = normalizedText };
* FormatInline(textNode, inline);
*
* textBlock.Inlines.Add(inline);
*
* textBlock.Measure(new Size(normalizedWidth, normalizedHeight));
*
* var borderTopWidth = textInputNode.GetBorder(CSSSpacingType.Top);
* var borderBottomWidth = textInputNode.GetBorder(CSSSpacingType.Bottom);
*
* var finalizedHeight = (float)textBlock.DesiredSize.Height;
* finalizedHeight += textInputNode._computedPadding[1];
* finalizedHeight += textInputNode._computedPadding[3];
* finalizedHeight += CSSConstants.IsUndefined(borderTopWidth) ? 0 : borderTopWidth;
* finalizedHeight += CSSConstants.IsUndefined(borderBottomWidth) ? 0 : borderBottomWidth;
*
* return new MeasureOutput(width, finalizedHeight);
*/
float finalizedHeight = 1;
return(MeasureOutput.Make(
(float)Math.Ceiling(width),
(float)Math.Ceiling(finalizedHeight)));
});
return(task.Result);
}
private static YogaSize MeasureTextInput(ReactTextInputShadowNode textInputNode, YogaNode node, float width, YogaMeasureMode widthMode, float height, YogaMeasureMode heightMode)
{
textInputNode._computedPadding = textInputNode.GetComputedPadding();
var borderLeftWidth = textInputNode.GetBorder(YogaEdge.Left);
var borderRightWidth = textInputNode.GetBorder(YogaEdge.Right);
var normalizedWidth = Math.Max(0,
(YogaConstants.IsUndefined(width) ? double.PositiveInfinity : width)
- textInputNode._computedPadding[0]
- textInputNode._computedPadding[2]
- (YogaConstants.IsUndefined(borderLeftWidth) ? 0 : borderLeftWidth)
- (YogaConstants.IsUndefined(borderRightWidth) ? 0 : borderRightWidth));
var normalizedHeight = Math.Max(0, YogaConstants.IsUndefined(height) ? double.PositiveInfinity : height);
var textBlock = new TextBlock
{
TextWrapping = TextWrapping.Wrap,
};
var normalizedText = string.IsNullOrEmpty(textInputNode._text) ? " " : textInputNode._text;
var inline = new Run {
Text = normalizedText
};
FormatInline(textInputNode, inline);
textBlock.Inlines.Add(inline);
textBlock.Measure(new Size(normalizedWidth, normalizedHeight));
var borderTopWidth = textInputNode.GetBorder(YogaEdge.Top);
var borderBottomWidth = textInputNode.GetBorder(YogaEdge.Bottom);
var finalizedHeight = (float)textBlock.DesiredSize.Height;
finalizedHeight += textInputNode._computedPadding[1];
finalizedHeight += textInputNode._computedPadding[3];
finalizedHeight += YogaConstants.IsUndefined(borderTopWidth) ? 0 : borderTopWidth;
finalizedHeight += YogaConstants.IsUndefined(borderBottomWidth) ? 0 : borderBottomWidth;
return(MeasureOutput.Make(
(float)Math.Ceiling(width),
(float)Math.Ceiling(finalizedHeight)));
}