using System;
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using System.Collections;
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using System.Drawing;
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namespace HH.WMS.Utils.Gios.Pdf
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{
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/// <summary>
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/// Describes a Flow Text Area for writing text without use Pdf positioning.
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/// </summary>
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public class PdfFlowTextArea : PdfObject
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{
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private double posX,posY;
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private double endX,endY;
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private double startX,startY;
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private double interline;
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internal ArrayList Fonts;
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Font ActualFont;Color ActualColor;
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internal string Stream;
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/// <summary>
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/// gets the Actual X position of the writer.
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/// </summary>
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public double PosX
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{
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get
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{
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return this.posX;
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}
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}
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/// <summary>
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/// gets the Actual Y position of the writer.
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/// </summary>
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public double PosY
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{
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get
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{
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return this.posY;
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}
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}
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/// <summary>
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/// Creates a new Flow Text Area.
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/// </summary>
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/// <param name="TextArea">the PdfArea which will contains the Text.</param>
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/// <param name="Font">the starting Font of the writings.</param>
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/// <param name="Color">the starting Color of the writings.</param>
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public PdfFlowTextArea(PdfArea TextArea,Font Font,Color Color)
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{
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this.Stream="";
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this.posX=TextArea.PosX;
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this.posY=TextArea.PosY;
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this.startX=TextArea.PosX;
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this.startY=TextArea.PosY;
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this.endX=TextArea.BottomRightCornerX;
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this.endY=TextArea.BottomRightCornerY;
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this.interline=Font.Size*1.6;
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this.Fonts=new ArrayList();
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this.SetColor(Color);
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this.SetFont(Font);
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}
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/// <summary>
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/// Creates a new Flow Text Area.
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/// </summary>
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/// <param name="TextArea">the PdfArea which will contains the Text.</param>
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/// <param name="Font">the starting Font of the writings.</param>
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/// <param name="Color">the starting Color of the writings.</param>
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/// <param name="StartX">the starting X position of the writing cursor.</param>
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/// <param name="StartY">the starting Y position of the writing cursor.</param>
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public PdfFlowTextArea(PdfArea TextArea,Font Font,Color Color,double StartX,double StartY)
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{
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this.Stream="";
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this.posX=TextArea.PosX;
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this.posY=TextArea.PosY;
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this.startX=StartX;
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this.startY=StartY;
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this.endX=TextArea.BottomRightCornerX;
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this.endY=TextArea.BottomRightCornerY;
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if (this.startX<this.posX||this.startX>this.endX) throw new Exception("Starting Point cannot be outside the FlowTextArea.");
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if (this.startY<this.posY||this.startY>this.endY) throw new Exception("Starting Point cannot be outside the FlowTextArea.");
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this.Fonts=new ArrayList();
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this.SetColor(Color);
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this.SetFont(Font);
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this.interline=Font.Size*1.6;
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}
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/// <summary>
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/// Creates a new Flow Text Area.
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/// </summary>
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/// <param name="TextArea">the PdfArea which will contains the Text.</param>
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/// <param name="Font">the starting Font of the writings.</param>
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/// <param name="Color">the starting Color of the writings.</param>
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/// <param name="StartX">the starting X position of the writing cursor.</param>
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/// <param name="StartY">the starting Y position of the writing cursor.</param>
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/// <param name="Interline">the Interline Size.</param>
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public PdfFlowTextArea(PdfArea TextArea,Font Font,Color Color,double StartX,double StartY,double Interline)
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{
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this.Stream="";
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this.posX=TextArea.PosX;
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this.posY=TextArea.PosY;
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this.startX=StartX;
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this.startY=StartY;
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this.endX=TextArea.BottomRightCornerX;
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this.endY=TextArea.BottomRightCornerY;
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if (this.startX<this.posX||this.startX>this.endX) throw new Exception("Starting Point cannot be outside the FlowTextArea.");
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if (this.startY<this.posY||this.startY>this.endY) throw new Exception("Starting Point cannot be outside the FlowTextArea.");
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this.Fonts=new ArrayList();
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this.SetColor(Color);
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this.SetFont(Font);
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this.interline=Interline;
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}
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/// <summary>
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/// Creates a new Flow Text Area.
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/// </summary>
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/// <param name="TextArea">the PdfArea which will contains the Text.</param>
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/// <param name="Font">the starting Font of the writings.</param>
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/// <param name="Color">the starting Color of the writings.</param>
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/// <param name="Interline">the Interline Size.</param>
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public PdfFlowTextArea(PdfArea TextArea,Font Font,Color Color,double Interline)
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{
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this.Stream="";
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this.posX=TextArea.PosX;
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this.posY=TextArea.PosY;
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this.startX=TextArea.PosX;
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this.startY=TextArea.PosY;
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this.endX=TextArea.BottomRightCornerX;
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this.endY=TextArea.BottomRightCornerY;
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this.Fonts=new ArrayList();
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this.SetColor(Color);
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this.SetFont(Font);
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this.interline=Interline;
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}
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/// <summary>
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/// Writes a string to the FlowTextArea width the current font style, color and size.
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/// </summary>
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/// <param name="text">The string to be written.</param>
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/// <returns>The Substring rejected by the method (text that doesn't fit inside the area.</returns>
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public string Write(string text)
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{
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if (text==null) throw new Exception("Text string cannot be null.");
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return this.Write(text,ActualFont,ActualColor);
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}
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/// <summary>
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/// Writes a string to the FlowTextArea width the current font style, color and size and
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/// applies a carriage return "\n"
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/// </summary>
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/// <param name="text">The line to be written.</param>
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/// <returns>The Substring rejected by the method (text that doesn't fit inside the area.</returns>
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public string WriteLine(string text)
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{
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if (text==null) throw new Exception("Text string cannot be null.");
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return this.Write(text+"\n",ActualFont,ActualColor);
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}
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/// <summary>
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/// Sets the foreground color for the following writings.
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/// </summary>
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/// <param name="Color"></param>
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public void SetColor(Color Color)
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{
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this.Stream+=Utility.ColorrgLine(Color);
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this.ActualColor=Color;
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}
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/// <summary>
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/// Sets the font style for the following writings.
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/// </summary>
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/// <param name="Font"></param>
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public void SetFont(Font Font)
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{
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if (this.ActualFont==null) this.ActualFont=Font;
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Font f=new Font(Font.Name,ActualFont.Size,Font.Style);
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this.ActualFont=Font;
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this.Fonts.Add(Font);
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this.Stream+=Utility.FontToFontLine(Font);
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}
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private string Write(string text,Font Font,Color Color)
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{
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char[] textchars=text.ToCharArray();
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ArrayList words=new ArrayList();
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string aWord="";
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for (int index=0;index<textchars.Length;index++)
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{
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char c=textchars[index];
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switch (c)
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{
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case ' ':
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{
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if (aWord!="") words.Add(aWord);
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words.Add(" "); aWord=""; break;
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}
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case '\n': words.Add(aWord); words.Add("\n"); aWord=""; break;
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default: aWord+=c; break;
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}
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}
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if (aWord!="") words.Add(aWord);
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words.Add("");
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double startLine=this.posX;
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string oldLine="",newLine="";
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double WordWidth=0,newLineWidth=0,oldLineWidth=0;
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for (int wordIndex=0;wordIndex<words.Count;wordIndex++)
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{
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string word=words[wordIndex] as string;
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WordWidth=Utility.Measure(Font,word);
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if (Font.Name!="Courier New") WordWidth=WordWidth*1.008;
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oldLineWidth=newLineWidth;
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newLineWidth+=WordWidth;
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oldLine=newLine;
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newLine+=word;
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if (word=="\n")
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{
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this.Stream+=LineToStream(Color,Font,oldLine,startLine,this.posY);
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newLineWidth=0;
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startLine=this.startX;
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newLine="";
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posX=this.startX;
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this.posY+=this.interline;
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}
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else
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if (startLine+newLineWidth>this.endX)
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{
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this.Stream+=LineToStream(Color,Font,oldLine,startLine,this.posY);
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this.posY+=this.interline;
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newLineWidth=WordWidth;
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startLine=this.startX;
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if (word!=" ") newLine=word; else newLine="";
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posX=this.startX;
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}
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if (wordIndex==words.Count-1)
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{
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this.Stream+=LineToStream(Color,Font,newLine,startLine,this.posY);
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this.posX=startLine+newLineWidth;
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}
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if (this.posY+this.interline>this.endY)
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{
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string s="";
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for (int wordIndex2=wordIndex+1;wordIndex2<words.Count;wordIndex2++)
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{
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s+=words[wordIndex2];
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}
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return newLine+s;
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}
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}
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return "";
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}
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internal override int StreamWrite(System.IO.Stream stream)
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{
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Byte[] part2;
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if (PdfDocument.FlateCompression) part2=Utility.Deflate("BT\n"+this.Stream+"ET\n"); else
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part2=System.Text.ASCIIEncoding.ASCII.GetBytes("BT\n"+this.Stream+"ET\n");
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string s1="";
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s1+=this.id.ToString()+" 0 obj\n";
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s1+="<< /Lenght "+part2.Length;
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if (PdfDocument.FlateCompression) s1+=" /Filter /FlateDecode";
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s1+=">>\n";
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s1+="stream\n";
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string s3="\nendstream\n";
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s3+="endobj\n";
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Byte[] part1=System.Text.ASCIIEncoding.ASCII.GetBytes(s1);
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Byte[] part3=System.Text.ASCIIEncoding.ASCII.GetBytes(s3);
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stream.Write(part1,0,part1.Length);
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stream.Write(part2,0,part2.Length);
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stream.Write(part3,0,part3.Length);
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return part1.Length+part2.Length+part3.Length;
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}
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private string LineToStream(Color Color,Font Font,string Line,double PosX,double PosY)
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{
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System.Text.StringBuilder sb=new System.Text.StringBuilder();
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sb.Append("1 0 0 1 ");
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sb.Append(PosX.ToString("0.##").Replace(",","."));
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sb.Append(" ");
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sb.Append((this.PdfDocument.PH-PosY-(Font.Height*0.525)).ToString("0.##").Replace(",","."));
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sb.Append(" Tm (");
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sb.Append(Utility.TextEncode(Utility.TextEncode(Line)));
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sb.Append(") Tj\n");
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return sb.ToString();
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}
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}
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}
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