Steven Kirk
11 years ago
14 changed files with 31 additions and 265 deletions
@ -1,92 +0,0 @@ |
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// -----------------------------------------------------------------------
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// <copyright file="TextService.cs" company="Steven Kirk">
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// Copyright 2014 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace Perspex.Cairo.Media |
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{ |
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using System; |
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using System.Linq; |
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using System.Runtime.InteropServices; |
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using Perspex.Media; |
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using Perspex.Platform; |
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public class TextService : ITextService |
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{ |
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/// <summary>
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/// Gets the pango context to be used by the service.
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/// </summary>
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/// <remarks>>
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/// There seems to be no way in GtkSharp to create a new Pango Context, so this has to
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/// be injected by CairoPlatform the first time a renderer is created.
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/// </remarks>
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public Pango.Context Context |
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{ |
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get; |
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internal set; |
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} |
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public Pango.Layout CreateLayout(FormattedText text) |
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{ |
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var layout = new Pango.Layout(this.Context) |
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{ |
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FontDescription = new Pango.FontDescription |
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{ |
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Family = text.FontFamilyName, |
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Size = Pango.Units.FromDouble(text.FontSize), |
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Style = (Pango.Style)text.FontStyle, |
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} |
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}; |
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layout.SetText(text.Text); |
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return layout; |
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} |
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public int GetCaretIndex(FormattedText text, Point point, Size constraint) |
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{ |
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var layout = this.CreateLayout(text); |
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int result; |
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int trailing; |
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return layout.XyToIndex( |
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Pango.Units.FromDouble(point.X), |
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Pango.Units.FromDouble(point.Y), |
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out result, |
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out trailing) ? result : text.Text.Length; |
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} |
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public Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint) |
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{ |
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// TODO: Rather than have this and GetLineHeights, might be best to just return
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// the rect if that's also possible in Direct2D backend.
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var layout = this.CreateLayout(text); |
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var rect = layout.IndexToPos(caretIndex); |
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return new Point(Pango.Units.ToDouble(rect.X), Pango.Units.ToDouble(rect.Y)); |
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} |
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public double[] GetLineHeights(FormattedText text, Size constraint) |
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{ |
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var layout = this.CreateLayout(text); |
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var lines = layout.Lines; |
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return lines.Select(x => |
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{ |
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var inkRect = new Pango.Rectangle(); |
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var logicalRect = new Pango.Rectangle(); |
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x.GetExtents(ref inkRect, ref logicalRect); |
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return (double)logicalRect.Height; |
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}).ToArray(); |
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} |
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public Size Measure(FormattedText text, Size constraint) |
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{ |
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var layout = this.CreateLayout(text); |
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Pango.Rectangle inkRect; |
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Pango.Rectangle logicalRect; |
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layout.GetExtents(out inkRect, out logicalRect); |
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return new Size(Pango.Units.ToDouble(logicalRect.Width), Pango.Units.ToDouble(logicalRect.Height)); |
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} |
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} |
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} |
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@ -1,23 +0,0 @@ |
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// -----------------------------------------------------------------------
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// <copyright file="ITextService.cs" company="Steven Kirk">
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// Copyright 2014 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace Perspex.Platform |
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{ |
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using System; |
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using Perspex.Media; |
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[Obsolete("Use methods on FormattedText instead.")] |
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public interface ITextService |
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{ |
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int GetCaretIndex(FormattedText text, Point point, Size constraint); |
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Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint); |
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double[] GetLineHeights(FormattedText text, Size constraint); |
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Size Measure(FormattedText text, Size constraint); |
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} |
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} |
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@ -1,90 +0,0 @@ |
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// -----------------------------------------------------------------------
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// <copyright file="TextService.cs" company="Steven Kirk">
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// Copyright 2014 MIT Licence. See licence.md for more information.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace Perspex.Direct2D1.Media |
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{ |
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using System; |
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using System.Linq; |
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using Perspex.Media; |
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using Perspex.Platform; |
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using SharpDX.DirectWrite; |
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public class TextService : ITextService |
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{ |
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private Factory factory; |
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public TextService(Factory factory) |
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{ |
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this.factory = factory; |
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} |
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public static TextFormat GetTextFormat(Factory factory, FormattedText text) |
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{ |
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return new TextFormat( |
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factory, |
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text.FontFamilyName, |
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FontWeight.Normal, |
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(SharpDX.DirectWrite.FontStyle)text.FontStyle, |
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(float)text.FontSize); |
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} |
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public TextLayout GetTextLayout(Factory factory, FormattedText text, Size constraint) |
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{ |
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return new TextLayout( |
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factory, |
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text.Text ?? string.Empty, |
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GetTextFormat(factory, text), |
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(float)constraint.Width, |
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(float)constraint.Height); |
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} |
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public int GetCaretIndex(FormattedText text, Point point, Size constraint) |
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{ |
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using (TextLayout layout = this.GetTextLayout(this.factory, text, constraint)) |
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{ |
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SharpDX.Bool isTrailingHit; |
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SharpDX.Bool isInside; |
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HitTestMetrics result = layout.HitTestPoint( |
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(float)point.X, |
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(float)point.Y, |
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out isTrailingHit, |
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out isInside); |
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return result.TextPosition + (isTrailingHit ? 1 : 0); |
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} |
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} |
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public Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint) |
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{ |
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using (TextLayout layout = this.GetTextLayout(this.factory, text, constraint)) |
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{ |
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float x; |
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float y; |
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layout.HitTestTextPosition(caretIndex, false, out x, out y); |
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return new Point(x, y); |
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} |
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} |
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public double[] GetLineHeights(FormattedText text, Size constraint) |
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{ |
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using (TextLayout layout = this.GetTextLayout(this.factory, text, constraint)) |
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{ |
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return layout.GetLineMetrics().Select(x => (double)x.Height).ToArray(); |
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} |
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} |
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public Size Measure(FormattedText text, Size constraint) |
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{ |
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using (TextLayout layout = this.GetTextLayout(this.factory, text, constraint)) |
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{ |
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return new Size( |
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layout.Metrics.WidthIncludingTrailingWhitespace, |
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layout.Metrics.Height); |
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} |
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} |
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} |
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} |
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