// BookmarkMarker.cs
//
// Author:
//   Lluis Sanchez Gual <lluis@novell.com>
//
// Copyright (c) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//

using System;
using MonoDevelop.Core;

using Mono.TextEditor.Highlighting;

namespace Mono.TextEditor
{
	class BookmarkMarker : MarginMarker
	{
		internal static BookmarkMarker Instance = new BookmarkMarker ();
		
		public BookmarkMarker ()
		{
		}

		public override bool CanDrawBackground (Margin margin)
		{
			return false;
		}

		public override bool CanDrawForeground (Margin margin)
		{
			return margin is IconMargin;
		}

		public override void DrawForeground (MonoTextEditor editor, Cairo.Context cr, MarginDrawMetrics metrics)
		{
			if (DrawBookmarkFunc != null)
				DrawBookmarkFunc (editor, cr, LineSegment, metrics.X, metrics.Y, metrics.Width, metrics.Height);
		}

		public override void UpdateAccessibilityDetails (out string label, out string help)
		{
			label = GettextCatalog.GetString ("Bookmark: line {0}", LineSegment.LineNumber);
			help = "";
		}

		public static Action<MonoTextEditor, Cairo.Context, DocumentLine, double, double, double, double> DrawBookmarkFunc;

		static void DrawRoundRectangle (Cairo.Context cr, double x, double y, double r, double w, double h)
		{
			const double ARC_TO_BEZIER = 0.55228475;
			double radius_x = r;
			double radius_y = r / 4;
			
			if (radius_x > w - radius_x)
				radius_x = w / 2;
					
			if (radius_y > h - radius_y)
				radius_y = h / 2;
			
			double c1 = ARC_TO_BEZIER * radius_x;
			double c2 = ARC_TO_BEZIER * radius_y;
			
			cr.NewPath ();
			cr.MoveTo (x + radius_x, y);
			cr.RelLineTo (w - 2 * radius_x, 0.0);
			cr.RelCurveTo (c1, 0.0, 
			               radius_x, c2, 
			               radius_x, radius_y);
			cr.RelLineTo (0, h - 2 * radius_y);
			cr.RelCurveTo (0.0, c2, c1 - radius_x, radius_y, -radius_x, radius_y);
			cr.RelLineTo (-w + 2 * radius_x, 0);
			cr.RelCurveTo (-c1, 0, -radius_x, -c2, -radius_x, -radius_y);
			cr.RelLineTo (0, -h + 2 * radius_y);
			cr.RelCurveTo (0.0, -c2, radius_x - c1, -radius_y, radius_x, -radius_y);
			cr.ClosePath ();
		}
	}
}