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using System;
using ElmSharp;
using ESize = ElmSharp.Size;
using ELayout = ElmSharp.Layout;
namespace Xamarin.Forms.Platform.Tizen.Native
{
/// <summary>
/// The Text Helper contains functions that assist in working with text-able objects.
/// </summary>
internal static class TextHelper
{
/// <summary>
/// Gets the size of raw text block.
/// </summary>
/// <param name="textable">The <see cref="EvasObject"/> with text part.</param>
/// <returns>Returns the size of raw text block.</returns>
public static ESize GetRawTextBlockSize(EvasObject textable)
{
return GetElmTextPart(textable).TextBlockNativeSize;
}
/// <summary>
/// Gets the size of formatted text block.
/// </summary>
/// <param name="textable">The <see cref="ElmSharp.EvasObject"/> with text part.</param>
/// <returns>Returns the size of formatted text block.</returns>
public static ESize GetFormattedTextBlockSize(EvasObject textable)
{
return GetElmTextPart(textable).TextBlockFormattedSize;
}
/// <summary>
/// Gets the ELM text part of evas object.
/// </summary>
/// <param name="textable">The <see cref="ElmSharp.EvasObject"/> with text part.</param>
/// <exception cref="ArgumentException">Throws exception when parameter <param name="textable"> isn't text-able object or doesn't have ELM text part.</exception>
/// <returns>Requested <see cref="ElmSharp.EdjeTextPartObject"/> instance.</returns>
static EdjeTextPartObject GetElmTextPart(EvasObject textable)
{
ELayout widget = textable as ELayout;
if (widget == null)
{
throw new ArgumentException("textable should be ElmSharp.Layout", "textable");
}
EdjeTextPartObject textPart = widget.EdjeObject["elm.text"];
if (textPart == null)
{
throw new ArgumentException("There is no elm.text part", "textable");
}
return textPart;
}
}
}
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