//============================================================================
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//Gios Pdf.NET - A library for exporting Pdf Documents in C#
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//Copyright (C) 2005 Paolo Gios - www.paologios.com
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//
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//This library is free software; you can redistribute it and/or
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//modify it under the terms of the GNU Lesser General Public
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//License as published by the Free Software Foundation; either
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//version 2.1 of the License, or (at your option) any later version.
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//
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//This library is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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//Lesser General Public License for more details.
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//
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//You should have received a copy of the GNU Lesser General Public
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//License along with this library; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//=============================================================================
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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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/// an area to be use for Text writingsz
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/// </summary>
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public class PdfTextArea : PdfObject
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{
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internal ArrayList tl;
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internal string text;
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internal PdfDocument PdfDocument
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{
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get
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{
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return this.PdfArea.PdfDocument;
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}
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}
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//internal ArrayList TextLines;
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internal PdfArea textArea;
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/// <summary>
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/// gets the Area available for the Text
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/// </summary>
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public PdfArea PdfArea
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{
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get
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{
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return this.textArea;
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}
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}
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internal System.Drawing.Font Font;
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internal System.Drawing.Color Color=System.Drawing.Color.Black;
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internal int maxlines
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{
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get
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{
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return (int)(this.textArea.height/this.lineHeight);
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}
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}
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internal double lineHeight;
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internal int DrawnLines
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{
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get
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{
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int l=this.RenderLines().Count;
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if (l>this.maxlines) return maxlines;
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return l;
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}
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}
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/// <summary>
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/// returns the Text that can't fit inside the estabilished area
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/// </summary>
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public string OverFlowText
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{
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get
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{
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ArrayList lines=this.RenderLines();
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string s="";
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for (int index=this.maxlines;index<lines.Count;index++)
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{
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s+=lines[index];
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}
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return s;
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}
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}
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internal ContentAlignment textAlign;
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/// <summary>
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/// creates a new PdfTextArea
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/// </summary>
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/// <param name="Font">the font that will be used</param>
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/// <param name="Color">the color of the font that will be used</param>
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/// <param name="TextArea">the estabilished area for the Text</param>
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/// <param name="PdfTextAlign">the ContentAlignment for the Text inside the area</param>
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/// <param name="Text">the text that will be written inside the area</param>
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public PdfTextArea(System.Drawing.Font Font,System.Drawing.Color Color,PdfArea TextArea,ContentAlignment PdfTextAlign,string Text)
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{
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if (Text==null) throw new Exception("Text cannot be null.");
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this.Font=Font;
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this.Color=Color;
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this.textArea=TextArea;
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this.text=Text;
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this.textAlign=PdfTextAlign;
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this.lineHeight=(double)(Font.Size);
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}
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internal ArrayList RenderLines()
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{
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if (tl==null)
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{
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tl=new ArrayList();
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string line="",oldline="";
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double lineWidth=0,oldlineWidth=0;
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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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for (int s2index=0;s2index<words.Count;s2index++)
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{
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string s=(string)words[s2index];
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oldline=line;
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line+=s;
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double wordWidth=Utility.Measure(Font,s);
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oldlineWidth=lineWidth;
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lineWidth+=wordWidth;
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if (s=="\n")
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{
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tl.Add(oldline);
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line="";
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lineWidth=0;
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}
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else
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if (lineWidth>this.textArea.width)
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{
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if (oldline!=" "&&oldline!="")
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{
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tl.Add(oldline);
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if (s==" ")
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{ line=""; lineWidth=0;}
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else
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{ line=s; lineWidth=wordWidth;}
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}
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}
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if (s2index==words.Count-1)
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if (line!=" "&&line!="")
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tl.Add(line);
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}
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}
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return this.tl;
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}
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internal string ToLineStream()
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{
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System.Text.StringBuilder sb=new System.Text.StringBuilder();
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//string text="";
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double posx,posy;
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ArrayList al=this.RenderLines();
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//if (this.LineFits)
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int l=al.Count;
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int ml=this.maxlines;
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for(int index=0;((index<l)&&(index<ml));index++)
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{
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//string line=(al[index] as string).TrimEnd(new char[]{' '});
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string line=(al[index] as string);
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posx=textArea.posx;
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posy=textArea.posy;
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double xdiff=0,ydiff=0;
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if ((this.textAlign!=ContentAlignment.MiddleLeft)&&
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(this.textAlign!=ContentAlignment.TopLeft)&&
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(this.textAlign!=ContentAlignment.BottomLeft))
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{
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xdiff=textArea.width-Utility.Measure(this.Font,line);
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if ((this.textAlign==ContentAlignment.TopCenter)||
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(this.textAlign==ContentAlignment.MiddleCenter)||
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(this.textAlign==ContentAlignment.BottomCenter)) xdiff=xdiff/2;
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}
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if ((this.textAlign!=ContentAlignment.TopCenter)&&
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(this.textAlign!=ContentAlignment.TopLeft)&&
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(this.textAlign!=ContentAlignment.TopRight))
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{
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ydiff=(double)(this.lineHeight-(this.Font.Height*0.6)
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+(this.maxlines-this.DrawnLines)*this.lineHeight);
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if ((this.textAlign==ContentAlignment.MiddleLeft)||
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(this.textAlign==ContentAlignment.MiddleCenter)||
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(this.textAlign==ContentAlignment.MiddleRight)) ydiff=ydiff/2;
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}
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posy+=ydiff;
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sb.Append("1 0 0 1 ");
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sb.Append((posx+xdiff).ToString("0.##").Replace(",","."));
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sb.Append(" ");
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sb.Append((this.PdfDocument.PH-posy-(this.lineHeight*(index))-(Font.Height*0.525)).ToString("0.##").Replace(",","."));
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sb.Append(" Tm (");
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sb.Append(Utility.TextEncode(line));
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sb.Append(") Tj\n");
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}
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return sb.ToString();
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}
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internal string CompleteLineStream()
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{
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System.Text.StringBuilder sb=new System.Text.StringBuilder();
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sb.Append("BT\n");
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sb.Append(Utility.FontToFontLine(this.Font));
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sb.Append(Utility.ColorrgLine(this.Color));
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sb.Append(this.ToLineStream());
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sb.Append("ET\n");
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return sb.ToString();
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}
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internal override int StreamWrite(System.IO.Stream stream)
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{
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int num=this.id;
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string text=this.CompleteLineStream();
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Byte[] part2;
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if (PdfDocument.FlateCompression) part2=Utility.Deflate(text); else
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part2=System.Text.ASCIIEncoding.ASCII.GetBytes(text);
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string s1="";
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s1+=num.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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}
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}
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