Core/PrintableView.cs

   1 /*
   2  * Copyright (C) 2013 FooProject
   3  * * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
   5
   6  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
   8
   9 You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
  10  */
  11 using System;
  12
  13 namespace FooEditEngine
  14 {
  15     sealed class PrintableView : ViewBase
  16     {
  17         public PrintableView(Document doc, IPrintableTextRender r, Padding margin)
  18             : base (doc,r,margin)
  19         {
  20         }
  21
  22         public string Header
  23         {
  24             get;
  25             set;
  26         }
  27
  28         public string Footer
  29         {
  30             get;
  31             set;
  32         }
  33
  34         public override void Draw(Rectangle updateRect, bool force = false)
  35         {
  36             if (this.LayoutLines.Count == 0)
  37                 return;
  38
  39             if (this.Hilighter != null)
  40                 this.Hilighter.Reset();
  41
  42             Point pos = this.render.TextArea.TopLeft;
  43             pos.X = Src.X;
  44             pos.Y = 0;
  45
  46             IPrintableTextRender render = (IPrintableTextRender)this.render;
  47
  48             //ヘッダーを印刷する
  49             if (this.Header != null && this.Header != string.Empty)
  50             {
  51                 this.render.DrawString(this.Header, pos.X, pos.Y, StringAlignment.Center,
  52                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea), render.FooterHeight));
  53                 pos.Y += (int)render.HeaderHeight;
  54             }
  55
  56             //レイアウト行を印刷する
  57             Rectangle contentArea = new Rectangle(pos.X, pos.Y, this.PageBound.Width, this.render.TextArea.Height);
  58             this.render.BeginClipRect(contentArea);
  59
  60             Size lineNumberSize = new Size(this.render.LineNemberWidth, this.render.TextArea.Height);
  61             for (int i = Src.Row; pos.Y <= this.render.TextArea.Bottom; i++)
  62             {
  63                 if (i >= this.LayoutLines.Count)
  64                     break;
  65
  66                 double layoutHeight = this.LayoutLines.GetLayout(i).Height;
  67
  68                 this.render.DrawOneLine(this.Document, this.LayoutLines, i, pos.X + this.render.TextArea.X, pos.Y + this.Src.OffsetY);
  69                 if (this.Document.DrawLineNumber)
  70                     this.render.DrawString((i + 1).ToString(), this.PageBound.X + this.GetRealtiveX(AreaType.LineNumberArea), pos.Y + this.Src.OffsetY, StringAlignment.Right, lineNumberSize);
  71
  72                 pos.Y += layoutHeight;
  73
  74             }
  75
  76             this.render.EndClipRect();
  77
  78             //フッターを印刷する
  79             if (this.Footer != null && this.Footer != string.Empty)
  80             {
  81                 pos.Y = render.TextArea.Bottom;
  82                 this.render.DrawString(this.Footer, pos.X, pos.Y, StringAlignment.Center,
  83                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea), render.FooterHeight));
  84             }
  85
  86             return;
  87         }
  88
  89         public bool TryPageDown()
  90         {
  91             double alignedPage = (int)(this.render.TextArea.Height / this.render.emSize.Height) * this.render.emSize.Height;
  92             return base.TryScroll(this.Src.X, alignedPage);
  93         }
  94
  95         protected override void CalculateClipRect()
  96         {
  97             double x, y, width, height;
  98
  99             if (this.Document.DrawLineNumber)
 100             {
 101                 if (this.render.RightToLeft)
 102                     x = this.Padding.Left;
 103                 else
 104                     x = this.render.LineNemberWidth + this.render.emSize.Width + this.Padding.Left + this.LineNumberMargin;
 105                 width = this.PageBound.Width - this.render.LineNemberWidth - this.render.emSize.Width - this.Padding.Right - this.Padding.Left - this.LineNumberMargin;
 106             }
 107             else
 108             {
 109                 x = this.Padding.Left;
 110                 width = this.PageBound.Width  - this.Padding.Right - this.Padding.Left;
 111             }
 112
 113             y = this.Padding.Top;
 114             height = this.PageBound.Height - this.Padding.Bottom - this.Padding.Top;
 115
 116             if (width < 0)
 117                 width = 0;
 118
 119             if (height < 0)
 120                 height = 0;
 121
 122             IPrintableTextRender render = (IPrintableTextRender)this.render;
 123
 124             if (this.Footer != null && this.Footer != string.Empty)
 125                 height -= render.FooterHeight;
 126             if (this.Header != null && this.Header != string.Empty)
 127                 height -= render.HeaderHeight;
 128
 129             this.render.TextArea = new Rectangle(x, y, width, height);
 130         }
 131
 132         public override void CalculateLineCountOnScreen()
 133         {
 134         }
 135
 136         enum AreaType
 137         {
 138             LineNumberArea,
 139             TextArea
 140         }
 141
 142         double GetRealtiveX(AreaType type)
 143         {
 144             switch (type)
 145             {
 146                 case AreaType.LineNumberArea:
 147                     if (this.Document.DrawLineNumber == false)
 148                         throw new InvalidOperationException();
 149                     if (this.render.RightToLeft)
 150                         return this.PageBound.TopRight.X - this.render.LineNemberWidth;
 151                     else
 152                         return this.render.TextArea.X - this.render.LineNemberWidth - this.render.emSize.Width - this.LineNumberMargin;
 153                 case AreaType.TextArea:
 154                     return this.render.TextArea.X;
 155             }
 156             throw new ArgumentOutOfRangeException();
 157         }
 158     }
 159 }