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GUIContent.cs
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220 lines (189 loc) · 6.68 KB
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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.Runtime.InteropServices;
using UnityEngine.Bindings;
using UnityEngine.Scripting;
namespace UnityEngine
{
// The contents of a GUI element.
[StructLayout(LayoutKind.Sequential)]
[Serializable]
[NativeHeader("Modules/IMGUI/GUIContent.h")]
[RequiredByNativeCode(Optional = true, GenerateProxy = true)]
public class GUIContent
{
// MUST MATCH MEMORY LAYOUT IN GUICONTENT.CPP
[SerializeField]
string m_Text = string.Empty;
[SerializeField]
Texture m_Image;
[SerializeField]
string m_Tooltip = string.Empty;
[SerializeField]
string m_TextWithWhitespace = string.Empty;
internal event Action OnTextChanged;
private static readonly GUIContent s_Text = new GUIContent();
private static readonly GUIContent s_Image = new GUIContent();
private static readonly GUIContent s_TextImage = new GUIContent();
internal static string k_ZeroWidthSpace = "\u200B";
// The text contained.
public string text
{
get { return m_Text; }
set
{
if (m_Text == value)
return;
m_Text = value;
textWithWhitespace = value;
OnTextChanged?.Invoke();
}
}
internal string textWithWhitespace
{
get
{
return string.IsNullOrEmpty(m_TextWithWhitespace) ? k_ZeroWidthSpace : m_TextWithWhitespace;
}
set =>
//The NoWidthSpace unicode is added at the end of the string to make sure LineFeeds update the layout of the text.
m_TextWithWhitespace = value + k_ZeroWidthSpace;
}
internal void SetTextWithoutNotify(string value)
{
m_Text = value;
textWithWhitespace = value;
}
// The icon image contained.
public Texture image
{
get { return m_Image; }
set { m_Image = value; }
}
// The tooltip of this element.
public string tooltip
{
get { return m_Tooltip; }
set { m_Tooltip = value; }
}
// Constructor for GUIContent in all shapes and sizes
public GUIContent() {}
// Build a GUIContent object containing only text.
public GUIContent(string text) :
this(text, null, string.Empty)
{}
// Build a GUIContent object containing only an image.
public GUIContent(Texture image) :
this(string.Empty, image, string.Empty)
{}
// Build a GUIContent object containing both /text/ and an image.
public GUIContent(string text, Texture image) :
this(text, image, string.Empty)
{}
// Build a GUIContent containing some /text/. When the user hovers the mouse over it, the global GUI::ref::tooltip is set to the /tooltip/.
public GUIContent(string text, string tooltip) :
this(text, null, tooltip)
{}
// Build a GUIContent containing an image. When the user hovers the mouse over it, the global GUI::ref::tooltip is set to the /tooltip/.
public GUIContent(Texture image, string tooltip) :
this(string.Empty, image, tooltip)
{}
// Build a GUIContent that contains both /text/, an /image/ and has a /tooltip/ defined. When the user hovers the mouse over it, the global GUI::ref::tooltip is set to the /tooltip/.
public GUIContent(string text, Texture image, string tooltip)
{
this.text = text;
this.image = image;
this.tooltip = tooltip;
}
// Build a GUIContent as a copy of another GUIContent.
public GUIContent(GUIContent src)
{
text = src.m_Text;
image = src.m_Image;
tooltip = src.m_Tooltip;
}
// Shorthand for empty content.
public static GUIContent none = new GUIContent("");
// *undocumented*
internal int hash
{
get
{
int h = 0;
if (!string.IsNullOrEmpty(m_Text))
h = m_Text.GetHashCode() * 37;
return h;
}
}
internal static GUIContent Temp(string t)
{
s_Text.m_Text = t;
s_Text.textWithWhitespace = t;
s_Text.m_Tooltip = string.Empty;
return s_Text;
}
internal static GUIContent Temp(string t, string tooltip)
{
s_Text.m_Text = t;
s_Text.textWithWhitespace = t;
s_Text.m_Tooltip = tooltip;
return s_Text;
}
internal static GUIContent Temp(Texture i)
{
s_Image.m_Image = i;
s_Image.m_Tooltip = string.Empty;
return s_Image;
}
internal static GUIContent Temp(Texture i, string tooltip)
{
s_Image.m_Image = i;
s_Image.m_Tooltip = tooltip;
return s_Image;
}
internal static GUIContent Temp(string t, Texture i)
{
s_TextImage.m_Text = t;
s_Text.textWithWhitespace = t;
s_TextImage.m_Image = i;
return s_TextImage;
}
[VisibleToOtherModules("UnityEngine.UIElementsModule")]
internal static void ClearStaticCache()
{
s_Text.m_Text = null;
s_Text.m_TextWithWhitespace = null;
s_Text.m_Tooltip = string.Empty;
s_Image.m_Image = null;
s_Image.m_Tooltip = string.Empty;
s_Image.m_TextWithWhitespace = null;
s_TextImage.m_Text = null;
s_TextImage.m_Image = null;
s_TextImage.m_TextWithWhitespace = null;
}
internal static GUIContent[] Temp(string[] texts)
{
GUIContent[] retval = new GUIContent[texts.Length];
for (int i = 0; i < texts.Length; i++)
{
retval[i] = new GUIContent(texts[i]);
}
return retval;
}
internal static GUIContent[] Temp(Texture[] images)
{
GUIContent[] retval = new GUIContent[images.Length];
for (int i = 0; i < images.Length; i++)
{
retval[i] = new GUIContent(images[i]);
}
return retval;
}
public override string ToString()
{
return text ?? tooltip ?? base.ToString();
}
}
}