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// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine.Scripting;
namespace UnityEngine
{
// Must be kept in sync with the enum in TextFormatting.h
[Flags]
enum TextGenerationError
{
None = 0,
CustomSizeOnNonDynamicFont = 1,
CustomStyleOnNonDynamicFont = 2,
NoFont = 4
}
[StructLayout(LayoutKind.Sequential)]
public struct TextGenerationSettings
{
public Font font;
public Color color;
public int fontSize;
public float lineSpacing;
public bool richText;
public float scaleFactor;
public FontStyle fontStyle;
public TextAnchor textAnchor;
public bool alignByGeometry;
public bool resizeTextForBestFit;
public int resizeTextMinSize;
public int resizeTextMaxSize;
public bool updateBounds;
public VerticalWrapMode verticalOverflow;
public HorizontalWrapMode horizontalOverflow;
public Vector2 generationExtents;
public Vector2 pivot;
public bool generateOutOfBounds;
private bool CompareColors(Color left, Color right)
{
return Mathf.Approximately(left.r, right.r)
&& Mathf.Approximately(left.g, right.g)
&& Mathf.Approximately(left.b, right.b)
&& Mathf.Approximately(left.a, right.a);
}
private bool CompareVector2(Vector2 left, Vector2 right)
{
return Mathf.Approximately(left.x, right.x) && Mathf.Approximately(left.y, right.y);
}
public bool Equals(TextGenerationSettings other)
{
return CompareColors(color, other.color)
&& fontSize == other.fontSize
&& Mathf.Approximately(scaleFactor, other.scaleFactor)
&& resizeTextMinSize == other.resizeTextMinSize
&& resizeTextMaxSize == other.resizeTextMaxSize
&& Mathf.Approximately(lineSpacing, other.lineSpacing)
&& fontStyle == other.fontStyle
&& richText == other.richText
&& textAnchor == other.textAnchor
&& alignByGeometry == other.alignByGeometry
&& resizeTextForBestFit == other.resizeTextForBestFit
&& resizeTextMinSize == other.resizeTextMinSize
&& resizeTextMaxSize == other.resizeTextMaxSize
&& resizeTextForBestFit == other.resizeTextForBestFit
&& updateBounds == other.updateBounds
&& horizontalOverflow == other.horizontalOverflow
&& verticalOverflow == other.verticalOverflow
&& CompareVector2(generationExtents, other.generationExtents)
&& CompareVector2(pivot, other.pivot)
&& font == other.font;
}
}
public partial class TextGenerator : IDisposable
{
// WARNING: Because this is a partial class, do not add any data members here; there is no defined ordering between fields
// in multiple declarations of partial class. All instance fields must be in the same declaration (for this class, they
// are in the corresponding Bindings.txt file.
public TextGenerator()
: this(50)
{}
public TextGenerator(int initialCapacity)
{
m_Ptr = Internal_Create();
m_Verts = new List<UIVertex>((initialCapacity + 1) * 4);
m_Characters = new List<UICharInfo>(initialCapacity + 1);
m_Lines = new List<UILineInfo>(20);
lock (s_Instances)
{
m_Id = s_NextId++;
s_Instances.Add(m_Id, new WeakReference(this));
}
}
~TextGenerator()
{
((IDisposable)this).Dispose();
}
void IDisposable.Dispose()
{
lock (s_Instances)
{
s_Instances.Remove(m_Id);
}
if (m_Ptr != IntPtr.Zero)
{
Internal_Destroy(m_Ptr);
m_Ptr = IntPtr.Zero;
}
}
public int characterCountVisible => characterCount - 1;
[RequiredByNativeCode]
internal static void InvalidateAll()
{
lock (s_Instances)
{
foreach (var kvp in s_Instances)
{
WeakReference wr = kvp.Value;
if (wr.IsAlive)
(wr.Target as TextGenerator).Invalidate();
}
}
}
private TextGenerationSettings ValidatedSettings(TextGenerationSettings settings)
{
if (settings.font != null && settings.font.dynamic)
return settings;
if (settings.fontSize != 0 || settings.fontStyle != FontStyle.Normal)
{
if (settings.font != null)
Debug.LogWarningFormat(settings.font, "Font size and style overrides are only supported for dynamic fonts. Font '{0}' is not dynamic.", settings.font.name);
settings.fontSize = 0;
settings.fontStyle = FontStyle.Normal;
}
if (settings.resizeTextForBestFit)
{
if (settings.font != null)
Debug.LogWarningFormat(settings.font, "BestFit is only supported for dynamic fonts. Font '{0}' is not dynamic.", settings.font.name);
settings.resizeTextForBestFit = false;
}
return settings;
}
public void Invalidate()
{
m_HasGenerated = false;
}
public void GetCharacters(List<UICharInfo> characters)
{
GetCharactersInternal(characters);
}
public void GetLines(List<UILineInfo> lines)
{
GetLinesInternal(lines);
}
public void GetVertices(List<UIVertex> vertices)
{
GetVerticesInternal(vertices);
}
public float GetPreferredWidth(string str, TextGenerationSettings settings)
{
settings.horizontalOverflow = HorizontalWrapMode.Overflow;
settings.verticalOverflow = VerticalWrapMode.Overflow;
settings.updateBounds = true;
Populate(str, settings);
return rectExtents.width;
}
public float GetPreferredHeight(string str, TextGenerationSettings settings)
{
settings.verticalOverflow = VerticalWrapMode.Overflow;
settings.updateBounds = true;
Populate(str, settings);
return rectExtents.height;
}
public bool PopulateWithErrors(string str, TextGenerationSettings settings, GameObject context)
{
var error = PopulateWithError(str, settings);
if (error == TextGenerationError.None)
return true;
if ((error & TextGenerationError.CustomSizeOnNonDynamicFont) != 0)
Debug.LogErrorFormat(context, "Font '{0}' is not dynamic, which is required to override its size", settings.font);
if ((error & TextGenerationError.CustomStyleOnNonDynamicFont) != 0)
Debug.LogErrorFormat(context, "Font '{0}' is not dynamic, which is required to override its style", settings.font);
//if ((error & TextGenerationError.NoFont) == TextGenerationError.NoFont)
// Debug.LogErrorFormat(context, "Missing font, aborting text generation", settings.font);
return false;
}
public bool Populate(string str, TextGenerationSettings settings)
{
var textGenerationError = PopulateWithError(str, settings);
return textGenerationError == TextGenerationError.None;
}
private TextGenerationError PopulateWithError(string str, TextGenerationSettings settings)
{
if (m_HasGenerated && str == m_LastString && settings.Equals(m_LastSettings))
return m_LastValid;
m_LastValid = PopulateAlways(str, settings);
return m_LastValid;
}
private TextGenerationError PopulateAlways(string str, TextGenerationSettings settings)
{
m_LastString = str;
m_HasGenerated = true;
m_CachedVerts = false;
m_CachedCharacters = false;
m_CachedLines = false;
m_LastSettings = settings;
var validSettings = ValidatedSettings(settings);
TextGenerationError error;
Populate_Internal(str, validSettings.font, validSettings.color, validSettings.fontSize,
validSettings.scaleFactor, validSettings.lineSpacing, validSettings.fontStyle,
validSettings.richText, validSettings.resizeTextForBestFit, validSettings.resizeTextMinSize,
validSettings.resizeTextMaxSize, validSettings.verticalOverflow, validSettings.horizontalOverflow,
validSettings.updateBounds, validSettings.textAnchor, validSettings.generationExtents,
validSettings.pivot, validSettings.generateOutOfBounds, validSettings.alignByGeometry, out error);
m_LastValid = error;
return error;
}
public IList<UIVertex> verts
{
get
{
if (!m_CachedVerts)
{
GetVertices(m_Verts);
m_CachedVerts = true;
}
return m_Verts;
}
}
public IList<UICharInfo> characters
{
get
{
if (!m_CachedCharacters)
{
GetCharacters(m_Characters);
m_CachedCharacters = true;
}
return m_Characters;
}
}
public IList<UILineInfo> lines
{
get
{
if (!m_CachedLines)
{
GetLines(m_Lines);
m_CachedLines = true;
}
return m_Lines;
}
}
}
}
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