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
  45             int endRow = Math.Min(this.LayoutLines.Count - 1, Src.Row + this.LineCountOnScreen - 1);
  46
  47             Size lineNumberSize = new Size(this.render.LineNemberWidth, this.render.TextArea.Height);
  48
  49             IPrintableTextRender render = (IPrintableTextRender)this.render;
  50
  51             //ヘッダーを印刷する
  52             if (this.Header != null && this.Header != string.Empty)
  53             {
  54                 this.render.DrawString(this.Header, pos.X, pos.Y, StringAlignment.Center,
  55                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea),render.FooterHeight));
  56
  57                 pos.Y += (int)render.HeaderHeight;
  58             }
  59
  60             //レイアウト行を印刷する
  61             for (int i = Src.Row; i <= endRow; i++)
  62             {
  63                 double lineHeight = this.LayoutLines.GetLayout(i).Height;
  64
  65                 this.render.DrawOneLine(this.Document, this.LayoutLines,i, pos.X + this.render.TextArea.X, pos.Y);
  66
  67                 if (this.Document.DrawLineNumber)
  68                     this.render.DrawString((i + 1).ToString(), this.PageBound.X + this.GetRealtiveX(AreaType.LineNumberArea), pos.Y, StringAlignment.Right, lineNumberSize);
  69
  70                 pos.Y += lineHeight;
  71             }
  72
  73             //フッターを印刷する
  74             if (this.Footer != null && this.Footer != string.Empty)
  75             {
  76                 pos.Y = render.TextArea.Bottom;
  77                 this.render.DrawString(this.Footer, pos.X, pos.Y, StringAlignment.Center,
  78                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea), render.FooterHeight));
  79             }
  80
  81             return;
  82         }
  83
  84         public bool TryPageDown()
  85         {
  86             return base.TryScroll(this.Src.X, this.Src.Row + this.LineCountOnScreen);
  87         }
  88
  89         protected override void CalculateClipRect()
  90         {
  91             double x, y, width, height;
  92
  93             if (this.Document.DrawLineNumber)
  94             {
  95                 if (this.render.RightToLeft)
  96                     x = this.Padding.Left;
  97                 else
  98                     x = this.render.LineNemberWidth + this.render.emSize.Width + this.Padding.Left + this.LineNumberMargin;
  99                 width = this.PageBound.Width - this.render.LineNemberWidth - this.render.emSize.Width - this.Padding.Right - this.Padding.Left - this.LineNumberMargin;
 100             }
 101             else
 102             {
 103                 x = this.Padding.Left;
 104                 width = this.PageBound.Width  - this.Padding.Right - this.Padding.Left;
 105             }
 106
 107             y = this.Padding.Top;
 108             height = this.PageBound.Height - this.Padding.Bottom - this.Padding.Top;
 109
 110             if (width < 0)
 111                 width = 0;
 112
 113             if (height < 0)
 114                 height = 0;
 115
 116             IPrintableTextRender render = (IPrintableTextRender)this.render;
 117
 118             if (this.Footer != null && this.Footer != string.Empty)
 119                 height -= render.FooterHeight;
 120             if (this.Header != null && this.Header != string.Empty)
 121                 height -= render.HeaderHeight;
 122
 123             this.render.TextArea = new Rectangle(x, y, width, height);
 124         }
 125
 126         public override void CalculateLineCountOnScreen()
 127         {
 128             if (this.LayoutLines.Count == 0)
 129                 return;
 130
 131             double y = 0;
 132             int i = this.Src.Row;
 133             for (; true; i++)
 134             {
 135                 int row = i < this.LayoutLines.Count ? i : this.LayoutLines.Count - 1;
 136
 137                 ITextLayout layout = this.LayoutLines.GetLayout(row);
 138
 139                 double lineHeight = layout.Height;
 140
 141                 y += lineHeight;
 142
 143                 if (y >= this.render.TextArea.Height)
 144                     break;
 145             }
 146             this.LineCountOnScreen = Math.Max(i - this.Src.Row - 1, 0); //ループを抜けると+1されている
 147         }
 148
 149         enum AreaType
 150         {
 151             LineNumberArea,
 152             TextArea
 153         }
 154
 155         double GetRealtiveX(AreaType type)
 156         {
 157             switch (type)
 158             {
 159                 case AreaType.LineNumberArea:
 160                     if (this.Document.DrawLineNumber == false)
 161                         throw new InvalidOperationException();
 162                     if (this.render.RightToLeft)
 163                         return this.PageBound.TopRight.X - this.render.LineNemberWidth;
 164                     else
 165                         return this.render.TextArea.X - this.render.LineNemberWidth - this.render.emSize.Width - this.LineNumberMargin;
 166                 case AreaType.TextArea:
 167                     return this.render.TextArea.X;
 168             }
 169             throw new ArgumentOutOfRangeException();
 170         }
 171     }
 172 }