internal static Vector2 MeasureVisualElementTextSize(VisualElement ve, string textToMeasure, float width, VisualElement.MeasureMode widthMode, float height, VisualElement.MeasureMode heightMode, ITextHandle textHandle)
{
float measuredWidth = float.NaN;
float measuredHeight = float.NaN;
if (textToMeasure == null || (ve.computedStyle.unityFont == null && ve.computedStyle.unityFontDefinition.IsEmpty()))
{
return(new Vector2(measuredWidth, measuredHeight));
}
var elementScaling = ve.ComputeGlobalScale();
if (elementScaling.x + elementScaling.y <= 0 || ve.scaledPixelsPerPoint <= 0)
{
return(Vector2.zero);
}
float pixelsPerPoint = ve.scaledPixelsPerPoint;
float pixelOffset = 0.02f;
float pointOffset = pixelOffset / pixelsPerPoint;
if (widthMode == VisualElement.MeasureMode.Exactly)
{
measuredWidth = width;
}
else
{
var textParams = MeshGenerationContextUtils.TextParams.MakeStyleBased(ve, textToMeasure);
textParams.wordWrap = false;
// Case 1215962: round up as yoga could decide to round down and text would start wrapping
measuredWidth = textHandle.ComputeTextWidth(textParams, pixelsPerPoint);
measuredWidth = measuredWidth < pointOffset ? 0 : AlignmentUtils.CeilToPixelGrid(measuredWidth, pixelsPerPoint, pixelOffset);
if (widthMode == VisualElement.MeasureMode.AtMost)
{
measuredWidth = Mathf.Min(measuredWidth, width);
}
}
if (heightMode == VisualElement.MeasureMode.Exactly)
{
measuredHeight = height;
}
else
{
var textParams = MeshGenerationContextUtils.TextParams.MakeStyleBased(ve, textToMeasure);
textParams.wordWrapWidth = measuredWidth;
measuredHeight = textHandle.ComputeTextHeight(textParams, pixelsPerPoint);
measuredHeight = measuredHeight < pointOffset ? 0 : AlignmentUtils.CeilToPixelGrid(measuredHeight, pixelsPerPoint, pixelOffset);
if (heightMode == VisualElement.MeasureMode.AtMost)
{
measuredHeight = Mathf.Min(measuredHeight, height);
}
}
return(new Vector2(measuredWidth, measuredHeight));
}
public float ComputeTextHeight(MeshGenerationContextUtils.TextParams parms, float scaling)
{
return(textHandle.ComputeTextHeight(parms, scaling));
}
