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)
  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.LayoutLines,i, pos.X + this.render.TextArea.X, pos.Y, null);
  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
  82         public bool TryPageDown()
  83         {
  84             return base.TryScroll(this.Src.X, this.Src.Row + this.LineCountOnScreen);
  85         }
  86
  87         protected override void CalculateClipRect()
  88         {
  89             double x, y, width, height;
  90
  91             if (this.Document.DrawLineNumber)
  92             {
  93                 if (this.render.RightToLeft)
  94                     x = this.Padding.Left;
  95                 else
  96                     x = this.render.LineNemberWidth + this.render.emSize.Width + this.Padding.Left + this.LineNumberMargin;
  97                 width = this.PageBound.Width - this.render.LineNemberWidth - this.render.emSize.Width - this.Padding.Right - this.Padding.Left - this.LineNumberMargin;
  98             }
  99             else
 100             {
 101                 x = this.Padding.Left;
 102                 width = this.PageBound.Width  - this.Padding.Right - this.Padding.Left;
 103             }
 104
 105             y = this.Padding.Top;
 106             height = this.PageBound.Height - this.Padding.Bottom - this.Padding.Top;
 107
 108             if (width < 0)
 109                 width = 0;
 110
 111             if (height < 0)
 112                 height = 0;
 113
 114             IPrintableTextRender render = (IPrintableTextRender)this.render;
 115
 116             if (this.Footer != null && this.Footer != string.Empty)
 117                 height -= render.FooterHeight;
 118             if (this.Header != null && this.Header != string.Empty)
 119                 height -= render.HeaderHeight;
 120
 121             this.render.TextArea = new Rectangle(x, y, width, height);
 122         }
 123
 124         public override void CalculateLineCountOnScreen()
 125         {
 126             if (this.LayoutLines.Count == 0)
 127                 return;
 128
 129             double y = 0;
 130             int i = this.Src.Row;
 131             for (; true; i++)
 132             {
 133                 int row = i < this.LayoutLines.Count ? i : this.LayoutLines.Count - 1;
 134
 135                 ITextLayout layout = this.LayoutLines.GetLayout(row);
 136
 137                 double lineHeight = layout.Height;
 138
 139                 y += lineHeight;
 140
 141                 if (y >= this.render.TextArea.Height)
 142                     break;
 143             }
 144             this.LineCountOnScreen = Math.Max(i - this.Src.Row - 1, 0); //ループを抜けると+1されている
 145         }
 146
 147         enum AreaType
 148         {
 149             LineNumberArea,
 150             TextArea
 151         }
 152
 153         double GetRealtiveX(AreaType type)
 154         {
 155             switch (type)
 156             {
 157                 case AreaType.LineNumberArea:
 158                     if (this.Document.DrawLineNumber == false)
 159                         throw new InvalidOperationException();
 160                     if (this.render.RightToLeft)
 161                         return this.PageBound.TopRight.X - this.render.LineNemberWidth;
 162                     else
 163                         return this.render.TextArea.X - this.render.LineNemberWidth - this.render.emSize.Width - this.LineNumberMargin;
 164                 case AreaType.TextArea:
 165                     return this.render.TextArea.X;
 166             }
 167             throw new ArgumentOutOfRangeException();
 168         }
 169     }
 170 }