// Unity C# reference source

// Copyright (c) Unity Technologies. For terms of use, see

// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using System;

namespace UnityEngine.Experimental.UIElements

{

public abstract class BaseTextElement : VisualElement

{

[SerializeField]

private string m_Text;

public virtual string text

{

get { return m_Text ?? String.Empty; }

set

{

if (m_Text == value)

return;

m_Text = value;

Dirty(ChangeType.Layout);

if (!string.IsNullOrEmpty(persistenceKey))

SavePersistentData();

}

}

public override void DoRepaint()

{

var painter = elementPanel.stylePainter;

painter.DrawBackground(this);

painter.DrawBorder(this);

painter.DrawText(this);

}

protected internal override Vector2 DoMeasure(float width, MeasureMode widthMode, float height, MeasureMode heightMode)

{

float measuredWidth = float.NaN;

float measuredHeight = float.NaN;

Font usedFont = style.font;

if (text == null || usedFont == null)

return new Vector2(measuredWidth, measuredHeight);

var stylePainter = elementPanel.stylePainter;

if (widthMode == MeasureMode.Exactly)

{

measuredWidth = width;

}

else

{

var textParams = stylePainter.GetDefaultTextParameters(this);

textParams.text = text;

textParams.font = usedFont;

textParams.wordWrapWidth = 0.0f;

textParams.wordWrap = false;

textParams.richText = true;

measuredWidth = stylePainter.ComputeTextWidth(textParams);

if (widthMode == MeasureMode.AtMost)

{

measuredWidth = Mathf.Min(measuredWidth, width);

}

}

if (heightMode == MeasureMode.Exactly)

{

measuredHeight = height;

}

else

{

var textParams = stylePainter.GetDefaultTextParameters(this);

textParams.text = text;

textParams.font = usedFont;

textParams.wordWrapWidth = measuredWidth;

textParams.richText = true;

measuredHeight = stylePainter.ComputeTextHeight(textParams);

if (heightMode == MeasureMode.AtMost)

{

measuredHeight = Mathf.Min(measuredHeight, height);

}

}

return new Vector2(measuredWidth, measuredHeight);

}

}

}