Common/PrintableView.cs

   1 /*\r
   2  * Copyright (C) 2013 FooProject\r
   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\r
   4  * the Free Software Foundation; either version 3 of the License, or (at your option) any later version.\r
   5 \r
   6  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of \r
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.\r
   8 \r
   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/>.\r
  10  */\r
  11 using System;\r
  12 \r
  13 namespace FooEditEngine\r
  14 {\r
  15     sealed class PrintableView : ViewBase\r
  16     {\r
  17         public PrintableView(Document doc, IPrintableTextRender r, Padding margin)\r
  18             : base (doc,r,margin)\r
  19         {\r
  20         }\r
  21 \r
  22         public string Header\r
  23         {\r
  24             get;\r
  25             set;\r
  26         }\r
  27 \r
  28         public string Footer\r
  29         {\r
  30             get;\r
  31             set;\r
  32         }\r
  33 \r
  34         public override void Draw(Rectangle updateRect)\r
  35         {\r
  36             if (this.LayoutLines.Count == 0)\r
  37                 return;\r
  38 \r
  39             if (this.Hilighter != null)\r
  40                 this.Hilighter.Reset();\r
  41 \r
  42             Point pos = this.render.TextArea.TopLeft;\r
  43             pos.X -= Src.X;\r
  44 \r
  45             int endRow = Math.Min(this.LayoutLines.Count - 1, Src.Row + this.LineCountOnScreen - 1);\r
  46 \r
  47             Size lineNumberSize = new Size(this.render.LineNemberWidth, this.render.TextArea.Height);\r
  48 \r
  49             IPrintableTextRender render = (IPrintableTextRender)this.render;\r
  50 \r
  51             //ヘッダーを印刷する\r
  52             if (this.Header != null && this.Header != string.Empty)\r
  53             {\r
  54                 this.render.DrawString(this.Header, pos.X, pos.Y, StringAlignment.Center,\r
  55                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea),render.FooterHeight));\r
  56 \r
  57                 pos.Y += (int)render.HeaderHeight;\r
  58             }\r
  59 \r
  60             //レイアウト行を印刷する\r
  61             for (int i = Src.Row; i <= endRow; i++)\r
  62             {\r
  63                 double lineHeight = this.LayoutLines.GetLayout(i).Height;\r
  64 \r
  65                 this.render.DrawOneLine(this.LayoutLines,i, pos.X + this.render.TextArea.X, pos.Y, null);\r
  66 \r
  67                 if (this.DrawLineNumber)\r
  68                     this.render.DrawString((i + 1).ToString(), this.PageBound.X + this.GetRealtiveX(AreaType.LineNumberArea), pos.Y, StringAlignment.Right, lineNumberSize);\r
  69 \r
  70                 pos.Y += lineHeight;\r
  71             }\r
  72 \r
  73             //フッターを印刷する\r
  74             if (this.Footer != null && this.Footer != string.Empty)\r
  75             {\r
  76                 pos.Y = render.TextArea.Bottom;\r
  77                 this.render.DrawString(this.Footer, pos.X, pos.Y, StringAlignment.Center,\r
  78                     new Size(render.TextArea.Width - this.GetRealtiveX(AreaType.TextArea), render.FooterHeight));\r
  79             }\r
  80         }\r
  81 \r
  82         public bool TryPageDown()\r
  83         {\r
  84             return base.TryScroll(this.Src.X, this.Src.Row + this.LineCountOnScreen);\r
  85         }\r
  86 \r
  87         protected override void CalculateClipRect()\r
  88         {\r
  89             double x, y, width, height;\r
  90 \r
  91             if (this.DrawLineNumber)\r
  92             {\r
  93                 if (this.render.RightToLeft)\r
  94                     x = this.Padding.Left;\r
  95                 else\r
  96                     x = this.render.LineNemberWidth + this.render.emSize.Width + this.Padding.Left + this.LineNumberMargin;\r
  97                 width = this.PageBound.Width - this.render.LineNemberWidth - this.render.emSize.Width - this.Padding.Right - this.Padding.Left - this.LineNumberMargin;\r
  98             }\r
  99             else\r
 100             {\r
 101                 x = this.Padding.Left;\r
 102                 width = this.PageBound.Width  - this.Padding.Right - this.Padding.Left;\r
 103             }\r
 104 \r
 105             y = this.Padding.Top;\r
 106             height = this.PageBound.Height - this.Padding.Bottom - this.Padding.Top;\r
 107 \r
 108             if (width < 0)\r
 109                 width = 0;\r
 110 \r
 111             if (height < 0)\r
 112                 height = 0;\r
 113 \r
 114             IPrintableTextRender render = (IPrintableTextRender)this.render;\r
 115 \r
 116             if (this.Footer != null && this.Footer != string.Empty)\r
 117                 height -= render.FooterHeight;\r
 118             if (this.Header != null && this.Header != string.Empty)\r
 119                 height -= render.HeaderHeight;\r
 120 \r
 121             this.render.TextArea = new Rectangle(x, y, width, height);\r
 122         }\r
 123 \r
 124         public override void CalculateLineCountOnScreen()\r
 125         {\r
 126             if (this.LayoutLines.Count == 0)\r
 127                 return;\r
 128 \r
 129             double y = 0;\r
 130             int i = this.Src.Row;\r
 131             for (; true; i++)\r
 132             {\r
 133                 int row = i < this.LayoutLines.Count ? i : this.LayoutLines.Count - 1;\r
 134 \r
 135                 ITextLayout layout = this.LayoutLines.GetLayout(row);\r
 136 \r
 137                 double lineHeight = layout.Height;\r
 138 \r
 139                 y += lineHeight;\r
 140 \r
 141                 if (y >= this.render.TextArea.Height)\r
 142                     break;\r
 143             }\r
 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\r
 145         }\r
 146 \r
 147         enum AreaType\r
 148         {\r
 149             LineNumberArea,\r
 150             TextArea\r
 151         }\r
 152 \r
 153         double GetRealtiveX(AreaType type)\r
 154         {\r
 155             switch (type)\r
 156             {\r
 157                 case AreaType.LineNumberArea:\r
 158                     if (this.DrawLineNumber == false)\r
 159                         throw new InvalidOperationException();\r
 160                     if (this.render.RightToLeft)\r
 161                         return this.PageBound.TopRight.X - this.render.LineNemberWidth;\r
 162                     else\r
 163                         return this.render.TextArea.X - this.render.LineNemberWidth - this.render.emSize.Width - this.LineNumberMargin;\r
 164                 case AreaType.TextArea:\r
 165                     return this.render.TextArea.X;\r
 166             }\r
 167             throw new ArgumentOutOfRangeException();\r
 168         }\r
 169     }\r
 170 }\r