// ===========================================================================
// ©2013-2026 WebSupergoo. All rights reserved.
//
// This source code is for use exclusively with the ABCpdf product with
// which it is distributed, under the terms of the license for that
// product. Details can be found at
//
// http://www.websupergoo.com/
//
// This copyright notice must not be deleted and must be reproduced alongside
// any sections of code extracted from this module.
// ===========================================================================
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml;
namespace ABCpdfControls
{
/// <summary>
/// Text block
/// </summary>
internal class TextBlock
{
/// <summary>
/// Constructor
/// </summary>
/// <param name="inText">Text string</param>
/// <param name="points">Vertices of the bounding box</param>
/// <param name="inNode">Xml node from the text content description</param>
public TextBlock(string inText, GraphicsPath path, XmlNode inNode)
{
Text = inText;
Path = path;
Node = inNode;
}
/// <summary>
/// Determines if point is inside the bounding box of a text block
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
public bool ContainsPoint(PointF p)
{
if (Path.PointCount < 4)
return false;
return (ClassifyPoint(Path.PathPoints[0], Path.PathPoints[1], p) <= 0) &&
(ClassifyPoint(Path.PathPoints[1], Path.PathPoints[2], p) <= 0) &&
(ClassifyPoint(Path.PathPoints[2], Path.PathPoints[3], p) <= 0) &&
(ClassifyPoint(Path.PathPoints[3], Path.PathPoints[0], p) <= 0);
}
/// <summary>
/// Check the position of the point relative to the line p0 - p1
/// </summary>
/// <param name="p0">Point of the line</param>
/// <param name="p1">Point of the line</param>
/// <param name="p">Point</param>
/// <returns> 1 if point is on the right side from the line
/// 0 if point is on the line itself
/// -1 if point is on the left side from the line</returns>
private int ClassifyPoint(PointF p0, PointF p1, PointF p)
{
PointF a = new PointF(p1.X - p0.X, p1.Y - p0.Y);
PointF b = new PointF(p.X - p0.X, p.Y - p0.Y);
double sa = a. X * b.Y - b.X * a.Y;
if (sa > 0.0)
return -1;
if (sa < 0.0)
return 1;
return 0;
}
public GraphicsPath GetGraphics(Matrix viewTransform)
{
GraphicsPath thePath = (GraphicsPath)Path.Clone();
thePath.Transform(viewTransform);
return thePath;
}
public GraphicsPath Path;
public XmlNode Node;
public int StreamId = 0;
public int StreamOffset = 0;
public int Length = 0;
public bool Selected;
public Matrix TextRenderingMatrix;
public string Text;
public Color TextColor;
public string TextColorOperator;
public float FontSize;
public string FontFamily;
public string FontOperator;
public string PDFOperator;
public float TextRise = 0;
public float WordSpacing = 0;
public float CharacterSpacing = 0;
public float TextLeading = 0;
public float HorizontalScaling = 100;
}
}
