Core/EditView.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 using System.Linq;
  13 using System.Collections.Generic;
  14
  15 namespace FooEditEngine
  16 {
  17     enum AdjustFlow
  18     {
  19         Row,
  20         Col,
  21         Both,
  22     }
  23
  24     enum TextPointSearchRange
  25     {
  26         TextAreaOnly,
  27         Full
  28     }
  29
  30     /// <summary>
  31     /// キャレットとドキュメントの表示を担当します。レイアウト関連もこちらで行います
  32     /// </summary>
  33     sealed class EditView : ViewBase
  34
  35     {
  36         internal const float LineMarkerThickness = 2;
  37         long tickCount;
  38         bool _CaretBlink;
  39         internal const int LineNumberLength = 6;
  40         const int UpdateAreaPaddingWidth = 2;
  41         const int UpdateAreaWidth = 4;
  42         const int UpdateAreaTotalWidth = UpdateAreaWidth + UpdateAreaPaddingWidth;
  43
  44         /// <summary>
  45         /// コンストラクター
  46         /// </summary>
  47         public EditView(Document doc, IEditorRender r, int MarginLeftAndRight = 5)
  48             : this(doc, r, new Padding(MarginLeftAndRight, 0, MarginLeftAndRight, 0))
  49         {
  50         }
  51
  52         /// <summary>
  53         /// コンストラクター
  54         /// </summary>
  55         /// <param name="doc">ドキュメント</param>
  56         /// <param name="r">レンダー</param>
  57         /// <param name="margin">マージン（１番目：左、２番目：上、３番目：右、４番目：下）</param>
  58         public EditView(Document doc, IEditorRender r, Padding margin)
  59             : base(doc, r, margin)
  60         {
  61             this.CaretBlinkTime = 500;
  62             this.CaretWidthOnInsertMode = 1;
  63             this.CalculateClipRect();
  64             this.CaretLocation = new Point(this.render.TextArea.X, this.render.TextArea.Y);
  65             this.LayoutLines.FoldingCollection.StatusChanged += FoldingCollection_StatusChanged;
  66             this.IsFocused = false;
  67         }
  68
  69         /// <summary>
  70         /// 選択範囲コレクション
  71         /// </summary>
  72         internal SelectCollection Selections
  73         {
  74             get { return this.Document.Selections; }
  75             set { this.Document.Selections = value; }
  76         }
  77
  78         /// <summary>
  79         /// ラインマーカーを描くなら偽。そうでなければ真
  80         /// </summary>
  81         public bool HideLineMarker
  82         {
  83             get { return this.Document.HideLineMarker; }
  84             set { this.Document.HideLineMarker = value; }
  85         }
  86
  87         /// <summary>
  88         /// キャレットを描くなら偽。そうでなければ真
  89         /// </summary>
  90         public bool HideCaret
  91         {
  92             get { return this.Document.HideCaret; }
  93             set { this.Document.HideCaret = value; }
  94         }
  95
  96         /// <summary>
  97         /// 挿入モードなら真を返し、上書きモードなら偽を返す
  98         /// </summary>
  99         public bool InsertMode
 100         {
 101             get { return this.Document.InsertMode; }
 102             set { this.Document.InsertMode = value; }
 103         }
 104
 105         /// <summary>
 106         /// キャレットの点滅間隔
 107         /// </summary>
 108         public int CaretBlinkTime
 109         {
 110             get;
 111             set;
 112         }
 113
 114         /// <summary>
 115         /// 挿入モード時のキャレットの幅
 116         /// </summary>
 117         public double CaretWidthOnInsertMode
 118         {
 119             get;
 120             set;
 121         }
 122
 123         /// <summary>
 124         /// フォーカスがあるなら真をセットする
 125         /// </summary>
 126         public bool IsFocused
 127         {
 128             get;
 129             set;
 130         }
 131
 132         /// <summary>
 133         /// キャレットを点滅させるなら真。そうでないなら偽
 134         /// </summary>
 135         /// <remarks>キャレット点滅タイマーもリセットされます</remarks>
 136         public bool CaretBlink
 137         {
 138             get { return this._CaretBlink; }
 139             set
 140             {
 141                 this._CaretBlink = value;
 142                 if (value)
 143                     this.tickCount = DateTime.Now.Ticks + this.To100nsTime(this.CaretBlinkTime);
 144             }
 145         }
 146
 147         /// <summary>
 148         /// 一ページの高さに収まる行数を返す（こちらは表示されていない行も含みます）
 149         /// </summary>
 150         public int LineCountOnScreenWithInVisible
 151         {
 152             get;
 153             private set;
 154         }
 155
 156         /// <summary>
 157         /// スクロール時に確保するマージン幅
 158         /// </summary>
 159         public double ScrollMarginWidth
 160         {
 161             get { return this.PageBound.Width * 20 / 100; }
 162         }
 163
 164         /// <summary>
 165         /// キャレットがある領域を示す
 166         /// </summary>
 167         public Point CaretLocation
 168         {
 169             get;
 170             private set;
 171         }
 172
 173         /// <summary>
 174         /// ヒットテストを行う
 175         /// </summary>
 176         /// <param name="x">x座標</param>
 177         /// <param name="y">y座標</param>
 178         /// <returns>テキストエリア内にあれば真。そうでなければ偽</returns>
 179         public bool HitTextArea(double x, double y)
 180         {
 181             if (x >= this.render.TextArea.X && x <= this.render.TextArea.Right &&
 182                 y >= this.render.TextArea.Y && y <= this.render.TextArea.Bottom)
 183                 return true;
 184             else
 185                 return false;
 186         }
 187
 188         public bool IsUpperTextArea(double x, double y)
 189         {
 190             if (x >= this.render.TextArea.X && x <= this.render.TextArea.Right && y < this.render.TextArea.Y)
 191                 return true;
 192             else
 193                 return false;
 194         }
 195
 196         public bool IsUnderTextArea(double x,double y)
 197         {
 198             if (x >= this.render.TextArea.X && x <= this.render.TextArea.Right && y > this.render.TextArea.Bottom)
 199                 return true;
 200             else
 201                 return false;
 202         }
 203
 204         /// <summary>
 205         /// ヒットテストを行う
 206         /// </summary>
 207         /// <param name="x">x座標</param>
 208         /// <param name="row">行</param>
 209         /// <returns>ヒットした場合はFoldingDataオブジェクトが返され、そうでない場合はnullが返る</returns>
 210         public FoldingItem HitFoldingData(double x, int row)
 211         {
 212             IEditorRender render = (IEditorRender)base.render;
 213
 214             if (x >= this.GetRealtiveX(AreaType.FoldingArea) && x <= this.GetRealtiveX(AreaType.FoldingArea) + render.FoldingWidth)
 215             {
 216                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(row);
 217                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(row);
 218                 FoldingItem foldingData = this.LayoutLines.FoldingCollection.Get(lineHeadIndex, lineLength);
 219                 if (foldingData != null && foldingData.IsFirstLine(this.LayoutLines,row))
 220                     return foldingData;
 221             }
 222             return null;
 223         }
 224
 225         /// <summary>
 226         /// Rectで指定された範囲にドキュメントを描く
 227         /// </summary>
 228         /// <param name="updateRect">描写する範囲</param>
 229         /// <param name="force">キャッシュした内容を使用しない場合は真を指定する</param>
 230         /// <remarks>描写する範囲がPageBoundより小さい場合、キャッシュされた内容を使用することがあります。なお、レタリング後にrender.CacheContent()を呼び出さなかった場合は更新範囲にかかわらずキャッシュを使用しません</remarks>
 231         public override void Draw(Rectangle updateRect,bool force = false)
 232         {
 233             if (this.LayoutLines.Count == 0)
 234                 return;
 235
 236             IEditorRender render = (IEditorRender)base.render;
 237
 238             if ((updateRect.Height < this.PageBound.Height ||
 239                 updateRect.Width < this.PageBound.Width) &&
 240                 render.IsVaildCache() &&
 241                 !force)
 242             {
 243                 render.DrawCachedBitmap(updateRect);
 244             }
 245             else
 246             {
 247                 Rectangle background = this.PageBound;
 248                 render.FillBackground(background);
 249
 250                 if (this.Document.HideRuler == false)
 251                     this.DrawRuler();
 252
 253                 this.DrawLineMarker(this.Document.CaretPostion.row);
 254
 255                 Point pos = this.render.TextArea.TopLeft;
 256                 //画面上では(X,Y)が開始位置になるが、開始する行が決まっているのでオフセットを求める
 257                 pos.Y -= this.Src.GetOffsetY(this.render.emSize.Height);
 258
 259                 double endposy = this.render.TextArea.Bottom;
 260                 Size lineNumberSize = new Size(this.render.LineNemberWidth, this.render.TextArea.Height);
 261
 262                 this.render.BeginClipRect(new Rectangle(this.PageBound.X, this.render.TextArea.Y, this.PageBound.Width, this.render.TextArea.Height));
 263
 264                 //パフォーマンス向上のため行番号などを先に描く
 265                 for (int i = this.Src.Row; i < this.LayoutLines.Count; i++)
 266                 {
 267                     int lineIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 268                     int lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 269                     ITextLayout layout = this.LayoutLines.GetLayout(i);
 270
 271                     if (pos.Y > endposy)
 272                         break;
 273
 274                     FoldingItem foldingData = this.LayoutLines.FoldingCollection.Get(lineIndex, lineLength);
 275
 276                     if (foldingData != null)
 277                     {
 278                         if (this.LayoutLines.FoldingCollection.IsHidden(lineIndex))
 279                             continue;
 280                         if (foldingData.IsFirstLine(this.LayoutLines, i))
 281                             render.DrawFoldingMark(foldingData.Expand, this.PageBound.X + this.GetRealtiveX(AreaType.FoldingArea), pos.Y);
 282                     }
 283
 284                     if (this.Document.DrawLineNumber)
 285                     {
 286                         this.render.DrawString((i + 1).ToString(), this.PageBound.X + this.GetRealtiveX(AreaType.LineNumberArea), pos.Y, StringAlignment.Right, lineNumberSize,StringColorType.LineNumber);
 287                     }
 288
 289                     DrawUpdateArea(i, pos.Y);
 290
 291                     pos.Y += layout.Height;
 292                     //pos.Y += this.render.emSize.Height;
 293                 }
 294
 295                 this.render.EndClipRect();
 296
 297                 //リセットしないと行が正しく描けない
 298                 pos = this.render.TextArea.TopLeft;
 299                 pos.X -= this.Src.X;
 300                 pos.Y -= this.Src.GetOffsetY(this.render.emSize.Height);
 301
 302                 this.render.BeginClipRect(this.render.TextArea);
 303
 304                 for (int i = this.Src.Row; i < this.LayoutLines.Count; i++)
 305                 {
 306                     int lineIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 307                     int lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 308                     ITextLayout layout = this.LayoutLines.GetLayout(i);
 309
 310                     if (pos.Y > endposy)
 311                         break;
 312
 313                     FoldingItem foldingData = this.LayoutLines.FoldingCollection.Get(lineIndex, lineLength);
 314
 315                     if (foldingData != null)
 316                     {
 317                         if (this.LayoutLines.FoldingCollection.IsHidden(lineIndex))
 318                             continue;
 319                     }
 320
 321                     this.render.DrawOneLine(this.Document, this.LayoutLines, i, pos.X, pos.Y);
 322
 323                     pos.Y += layout.Height;
 324                     //pos.Y += this.render.emSize.Height;
 325                 }
 326
 327                 this.render.EndClipRect();
 328
 329                 this.DrawInsertPoint();
 330
 331                 this.Document.SelectGrippers.BottomLeft.Draw(this.render);
 332                 this.Document.SelectGrippers.BottomRight.Draw(this.render);
 333
 334                 render.CacheContent();
 335             }
 336
 337              this.DrawCaret();
 338         }
 339
 340         void DrawUpdateArea(int row,double ypos)
 341         {
 342             IEditorRender render = (IEditorRender)base.render;
 343             if(this.LayoutLines.GetDirtyFlag(row))
 344             {
 345                 Point pos = new Point(this.PageBound.X + this.GetRealtiveX(AreaType.UpdateArea), ypos);
 346                 Rectangle rect = new Rectangle(pos.X, pos.Y, UpdateAreaWidth, this.LayoutLines.GetLayout(row).Height);
 347                 render.FillRectangle(rect, FillRectType.UpdateArea);
 348             }
 349         }
 350
 351         void DrawRuler()
 352         {
 353             IEditorRender render = (IEditorRender)base.render;
 354
 355             Point pos, from, to;
 356             Size emSize = render.emSize;
 357             Rectangle clipRect = this.render.TextArea;
 358             int count = 0;
 359             double markerHeight = emSize.Height / 2;
 360             if (this.Document.RightToLeft)
 361             {
 362                 pos = new Point(clipRect.TopRight.X, clipRect.TopRight.Y - emSize.Height - LineMarkerThickness);
 363                 for (; pos.X >= clipRect.TopLeft.X; pos.X -= emSize.Width, count++)
 364                 {
 365                     from = pos;
 366                     to = new Point(pos.X, pos.Y + emSize.Height);
 367                     int mod = count % 10;
 368                     if (mod == 0)
 369                     {
 370                         string countStr = (count / 10).ToString();
 371                         double counterWidth = emSize.Width * countStr.Length;
 372                         this.render.DrawString(countStr, pos.X - counterWidth, pos.Y, StringAlignment.Right, new Size(counterWidth, double.MaxValue));
 373                     }
 374                     else if (mod == 5)
 375                         from.Y = from.Y + emSize.Height / 2;
 376                     else
 377                         from.Y = from.Y + emSize.Height * 3 / 4;
 378                     render.DrawLine(from, to);
 379                     if (this.CaretLocation.X >= pos.X && this.CaretLocation.X < pos.X + emSize.Width)
 380                         render.FillRectangle(new Rectangle(pos.X, pos.Y + markerHeight, emSize.Width, markerHeight), FillRectType.OverwriteCaret);
 381                 }
 382             }
 383             else
 384             {
 385                 pos = new Point(clipRect.TopLeft.X, clipRect.TopLeft.Y - emSize.Height - LineMarkerThickness);
 386                 for (; pos.X < clipRect.TopRight.X; pos.X += emSize.Width, count++)
 387                 {
 388                     from = pos;
 389                     to = new Point(pos.X, pos.Y + emSize.Height);
 390                     int mod = count % 10;
 391                     if (mod == 0)
 392                         this.render.DrawString((count / 10).ToString(), pos.X, pos.Y, StringAlignment.Left, new Size(double.MaxValue, double.MaxValue));
 393                     else if (mod == 5)
 394                         from.Y = from.Y + emSize.Height / 2;
 395                     else
 396                         from.Y = from.Y + emSize.Height * 3 / 4;
 397                     render.DrawLine(from, to);
 398                     if (this.CaretLocation.X >= pos.X && this.CaretLocation.X < pos.X + emSize.Width)
 399                         render.FillRectangle(new Rectangle(pos.X, pos.Y + markerHeight, emSize.Width, markerHeight), FillRectType.OverwriteCaret);
 400                 }
 401             }
 402             from = clipRect.TopLeft;
 403             from.Y -= LineMarkerThickness;
 404             to = clipRect.TopRight;
 405             to.Y -= LineMarkerThickness;
 406             render.DrawLine(from, to);
 407         }
 408
 409         void DrawInsertPoint()
 410         {
 411             //一つしかない場合は行選択の可能性がある
 412             if (this.Selections.Count <= 1)
 413                 return;
 414             IEditorRender render = (IEditorRender)base.render;
 415             foreach (Selection sel in this.Selections)
 416             {
 417                 if (sel.length == 0)
 418                 {
 419                     TextPoint tp = this.GetLayoutLineFromIndex(sel.start);
 420                     Point left = this.GetPostionFromTextPoint(tp);
 421                     double lineHeight = this.LayoutLines.GetLayout(tp.row).Height;
 422                     Rectangle InsertRect = new Rectangle(left.X,
 423                         left.Y,
 424                         CaretWidthOnInsertMode,
 425                         lineHeight);
 426                     render.FillRectangle(InsertRect, FillRectType.InsertPoint);
 427                 }
 428             }
 429         }
 430
 431         bool DrawCaret()
 432         {
 433             if (this.HideCaret || !this.IsFocused)
 434                 return false;
 435
 436             long diff = DateTime.Now.Ticks - this.tickCount;
 437             long blinkTime = this.To100nsTime(this.CaretBlinkTime);
 438
 439             if (this.CaretBlink && diff % blinkTime >= blinkTime / 2)
 440                 return false;
 441
 442             Rectangle CaretRect = new Rectangle();
 443
 444             IEditorRender render = (IEditorRender)base.render;
 445
 446             int row = this.Document.CaretPostion.row;
 447             ITextLayout layout = this.LayoutLines.GetLayout(row);
 448             double lineHeight = layout.Height;
 449             double charWidth = layout.GetWidthFromIndex(this.Document.CaretPostion.col);
 450
 451             if (this.InsertMode || charWidth == 0)
 452             {
 453                 CaretRect.Size = new Size(CaretWidthOnInsertMode, lineHeight);
 454                 CaretRect.Location = new Point(this.CaretLocation.X, this.CaretLocation.Y);
 455                 render.FillRectangle(CaretRect, FillRectType.InsertCaret);
 456             }
 457             else
 458             {
 459                 double height = lineHeight / 3;
 460                 CaretRect.Size = new Size(charWidth, height);
 461                 CaretRect.Location = new Point(this.CaretLocation.X, this.CaretLocation.Y + lineHeight - height);
 462                 render.FillRectangle(CaretRect, FillRectType.OverwriteCaret);
 463             }
 464             return true;
 465         }
 466
 467         long To100nsTime(int ms)
 468         {
 469             return ms * 10000;
 470         }
 471
 472         public void DrawLineMarker(int row)
 473         {
 474             if (this.HideLineMarker || !this.IsFocused)
 475                 return;
 476             IEditorRender render = (IEditorRender)base.render;
 477             Point p = this.CaretLocation;
 478             double height = this.LayoutLines.GetLayout(this.Document.CaretPostion.row).Height;
 479             double width = this.render.TextArea.Width;
 480             render.FillRectangle(new Rectangle(this.PageBound.X + this.render.TextArea.X, this.CaretLocation.Y, width, height), FillRectType.LineMarker);
 481         }
 482
 483         /// <summary>
 484         /// 現在のキャレット位置の領域を返す
 485         /// </summary>
 486         /// <returns>矩形領域を表すRectangle</returns>
 487         public Rectangle GetCurrentCaretRect()
 488         {
 489             ITextLayout layout = this.LayoutLines.GetLayout(this.Document.CaretPostion.row);
 490             double width = layout.GetWidthFromIndex(this.Document.CaretPostion.col);
 491             if (width == 0.0)
 492                 width = this.CaretWidthOnInsertMode;
 493             double height = layout.Height;
 494             Rectangle updateRect = new Rectangle(
 495                 this.CaretLocation.X,
 496                 this.CaretLocation.Y,
 497                 width,
 498                 height);
 499             return updateRect;
 500         }
 501
 502         /// <summary>
 503         /// 指定した座標の一番近くにあるTextPointを取得する
 504         /// </summary>
 505         /// <param name="p">テキストエリアを左上とする相対位置</param>
 506         /// <param name="searchRange">探索範囲</param>
 507         /// <returns>レイアウトラインを指し示すTextPoint</returns>
 508         public TextPoint GetTextPointFromPostion(Point p,TextPointSearchRange searchRange = TextPointSearchRange.TextAreaOnly)
 509         {
 510             if(searchRange == TextPointSearchRange.TextAreaOnly)
 511             {
 512                 if (p.Y < this.render.TextArea.TopLeft.Y ||
 513                     p.Y > this.render.TextArea.BottomRight.Y)
 514                     return TextPoint.Null;
 515             }
 516
 517             TextPoint tp = new TextPoint();
 518
 519             if (this.LayoutLines.Count == 0)
 520                 return tp;
 521
 522             //表示領域から探索を始めるのでパディングの分だけ引く
 523             p.Y -= this.render.TextArea.Y;
 524
 525             int lineHeadIndex, lineLength;
 526
 527             if(p.Y >= 0)
 528             {
 529                 double y = 0;
 530                 tp.row = this.LayoutLines.Count - 1;
 531                 for (int i = this.Src.Row; i < this.LayoutLines.Count; i++)
 532                 {
 533                     double height = this.LayoutLines.GetLayout(i).Height;
 534
 535                     lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 536                     lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 537
 538                     if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 539                         continue;
 540
 541                     if (y + height > p.Y)
 542                     {
 543                         tp.row = i;
 544                         break;
 545                     }
 546                     y += height;
 547                 }
 548             }else{
 549                 double y = 0;
 550                 tp.row = 0;
 551                 for (int i = this.Src.Row; i >= 0; i--)
 552                 {
 553                     double height = this.LayoutLines.GetLayout(i).Height;
 554
 555                     lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 556                     lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 557
 558                     if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 559                         continue;
 560
 561                     if (y - height < p.Y)
 562                     {
 563                         tp.row = i;
 564                         break;
 565                     }
 566                     y -= height;
 567                 }
 568             }
 569
 570             if (searchRange == TextPointSearchRange.TextAreaOnly)
 571             {
 572                 if (p.X < this.render.TextArea.X)
 573                     return tp;
 574             }
 575
 576             tp.col = GetIndexFromColPostion(tp.row, p.X);
 577
 578             lineLength = this.LayoutLines.GetLengthFromLineNumber(tp.row);
 579             if (tp.col > lineLength)
 580                 tp.col = lineLength;
 581
 582             return tp;
 583         }
 584
 585         /// <summary>
 586         /// 桁方向の座標に対応するインデックスを取得する
 587         /// </summary>
 588         /// <param name="row">対象となる行</param>
 589         /// <param name="x">テキストエリアからの相対位置</param>
 590         /// <returns></returns>
 591         public int GetIndexFromColPostion(int row, double x)
 592         {
 593             x -= this.render.TextArea.X;
 594             int lineLength = this.LayoutLines.GetLengthFromLineNumber(row);
 595             if (lineLength == 0)
 596                 return 0;
 597             int index = this.LayoutLines.GetLayout(row).GetIndexFromColPostion(this.Src.X + x);
 598             return index;
 599         }
 600
 601         /// <summary>
 602         /// インデックスに対応する桁方向の座標を得る
 603         /// </summary>
 604         /// <param name="row">対象となる行</param>
 605         /// <param name="index">インデックス</param>
 606         /// <returns>テキストエリアからの相対位置を返す</returns>
 607         public double GetColPostionFromIndex(int row, int index)
 608         {
 609             double x = this.LayoutLines.GetLayout(row).GetColPostionFromIndex(index);
 610             return x - Src.X + this.render.TextArea.X;
 611         }
 612
 613         /// <summary>
 614         /// TextPointに対応する座標を得る
 615         /// </summary>
 616         /// <param name="tp">レイアウトライン上の位置</param>
 617         /// <returns>テキストエリアを左上とする相対位置</returns>
 618         public Point GetPostionFromTextPoint(TextPoint tp)
 619         {
 620             Point p = new Point();
 621             for (int i = this.Src.Row; i < tp.row; i++)
 622             {
 623                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 624                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 625                 if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 626                     continue;
 627                 p.Y += this.LayoutLines.GetLayout(i).Height;
 628             }
 629             p.X = this.GetColPostionFromIndex(tp.row, tp.col);
 630             p.Y += this.render.TextArea.Y;
 631             return p;
 632         }
 633
 634         public Gripper HitGripperFromPoint(Point p)
 635         {
 636             if (this.Document.SelectGrippers.BottomLeft.IsHit(p))
 637                 return this.Document.SelectGrippers.BottomLeft;
 638             if (this.Document.SelectGrippers.BottomRight.IsHit(p))
 639                 return this.Document.SelectGrippers.BottomRight;
 640             return null;
 641         }
 642
 643         public Rectangle GetRectFromIndex(int index,int width,int height)
 644         {
 645             TextPoint tp = this.LayoutLines.GetTextPointFromIndex(index);
 646             return this.GetRectFromTextPoint(tp, width, height);
 647         }
 648
 649         public Rectangle GetRectFromTextPoint(TextPoint tp, int width, int height)
 650         {
 651             if (tp.row < this.Src.Row)
 652                 return Rectangle.Empty;
 653             double radius = width / 2;
 654             Point point = this.GetPostionFromTextPoint(tp);
 655             double lineHeight = this.LayoutLines.GetLayout(tp.row).Height;
 656             double srcOffsetY = this.Src.GetOffsetY(this.render.emSize.Height); //画面上ではずれているので引く必要がある
 657
 658             Rectangle rect =  new Rectangle(point.X - radius, point.Y + lineHeight - srcOffsetY, width, height);
 659
 660             if (rect.BottomLeft.Y >= this.render.TextArea.BottomLeft.Y ||
 661                 rect.BottomRight.X < this.render.TextArea.BottomLeft.X ||
 662                 rect.BottomLeft.X > this.render.TextArea.BottomRight.X)
 663                 return Rectangle.Empty;
 664             return rect;
 665         }
 666
 667         /// <summary>
 668         /// キャレットを指定した位置に移動させる
 669         /// </summary>
 670         /// <param name="row"></param>
 671         /// <param name="col"></param>
 672         /// <param name="autoExpand">折り畳みを展開するなら真</param>
 673         public void JumpCaret(int row, int col, bool autoExpand = true)
 674         {
 675             if (autoExpand)
 676             {
 677                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(row);
 678                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(row);
 679                 FoldingItem foldingData = this.LayoutLines.FoldingCollection.Get(lineHeadIndex, lineLength);
 680                 if(foldingData != null)
 681                 {
 682                     if (this.LayoutLines.FoldingCollection.IsParentHidden(foldingData) || !foldingData.IsFirstLine(this.LayoutLines, row))
 683                     {
 684                         this.LayoutLines.FoldingCollection.Expand(foldingData);
 685                     }
 686                 }
 687             }
 688
 689             //イベント呼び出しの再入防止のため
 690             this.Document.SetCaretPostionWithoutEvent(new TextPoint(row, col));
 691         }
 692
 693         /// <summary>
 694         /// index上の文字が表示されるようにSrcを調整する
 695         /// </summary>
 696         /// <param name="index">インデックス</param>
 697         /// <returns>調整されたら真。そうでなければ偽</returns>
 698         public bool AdjustSrc(int index)
 699         {
 700             TextPoint startTextPoint = this.GetLayoutLineFromIndex(index);
 701             double x = this.LayoutLines.GetLayout(startTextPoint.row).GetColPostionFromIndex(startTextPoint.col);
 702             if (x < this.Src.X ||
 703                 x > this.Src.X + this.PageBound.Width)
 704             {
 705                 this.TryScroll(x, this.Src.Row);
 706                 return true;
 707             }
 708             if (startTextPoint.row < this.Src.Row ||
 709                 startTextPoint.row > this.Src.Row + this.LineCountOnScreenWithInVisible)
 710             {
 711                 this.TryScroll(this.Src.X, startTextPoint.row);
 712                 return true;
 713             }
 714             return false;
 715         }
 716
 717         /// <summary>
 718         /// キャレットがあるところまでスクロールする
 719         /// </summary>
 720         /// <return>再描写する必要があるなら真を返す</return>
 721         /// <remarks>Document.Update(type == UpdateType.Clear)イベント時に呼び出した場合、例外が発生します</remarks>
 722         public bool AdjustCaretAndSrc(AdjustFlow flow = AdjustFlow.Both)
 723         {
 724             IEditorRender render = (IEditorRender)base.render;
 725
 726             if (this.PageBound.Width == 0 || this.PageBound.Height == 0)
 727             {
 728                 this.SetCaretPostion(this.Padding.Left + render.FoldingWidth, 0);
 729                 return false;
 730             }
 731
 732             bool result = false;
 733             TextPoint tp = this.Document.CaretPostion;
 734             double x = this.CaretLocation.X;
 735             double y = this.CaretLocation.Y;
 736
 737             if (flow == AdjustFlow.Col || flow == AdjustFlow.Both)
 738             {
 739                 x = this.LayoutLines.GetLayout(tp.row).GetColPostionFromIndex(tp.col);
 740
 741                 double left = this.Src.X;
 742                 double right = this.Src.X + this.render.TextArea.Width;
 743
 744                 if (x >= left && x <= right)    //xは表示領域にないにある
 745                 {
 746                     x -= left;
 747                 }
 748                 else if (x > right) //xは表示領域の右側にある
 749                 {
 750                     this.Document.Src = new SrcPoint(x - this.render.TextArea.Width + this.ScrollMarginWidth,this.Document.Src.Row,this.Document.Src.Y);
 751                     if (this.Document.RightToLeft && this.Document.Src.X > 0)
 752                     {
 753                         System.Diagnostics.Debug.Assert(x > 0);
 754                         this.Document.Src = new SrcPoint(0, this.Document.Src.Row, this.Document.Src.Y);
 755                     }
 756                     else
 757                     {
 758                         x = this.render.TextArea.Width - this.ScrollMarginWidth;
 759                     }
 760                     result = true;
 761                 }
 762                 else if (x < left)    //xは表示領域の左側にある
 763                 {
 764                     this.Document.Src = new SrcPoint(x - this.ScrollMarginWidth, this.Document.Src.Row, this.Document.Src.Y);
 765                     if (!this.Document.RightToLeft && this.Document.Src.X < this.render.TextArea.X)
 766                     {
 767                         this.Document.Src = new SrcPoint(0, this.Document.Src.Row, this.Document.Src.Y);
 768                     }
 769                     else
 770                     {
 771                         x = this.ScrollMarginWidth;
 772                     }
 773                     result = true;
 774                 }
 775                 x += this.render.TextArea.X;
 776             }
 777
 778             if (flow == AdjustFlow.Row || flow == AdjustFlow.Both)
 779             {
 780                 int caretRow = 0;
 781                 int lineCount = this.LineCountOnScreenWithInVisible;
 782                 if (tp.row >= this.Src.Row && tp.row < this.Src.Row + lineCount)
 783                 {
 784                     caretRow = tp.row - this.Src.Row;
 785                     y = -this.Src.GetOffsetY(this.render.emSize.Height);    //画面上ではずれているので引く必要がある
 786                 }
 787                 else if (tp.row >= this.Src.Row + lineCount)
 788                 {
 789                     int srcRow = this.GetSrcRow(tp.row, this.LineCountOnScreen);
 790                     this.Document.Src = new SrcPoint(this.Document.Src.X, srcRow, srcRow * this.render.emSize.Height);
 791                     caretRow = tp.row - this.Document.Src.Row;
 792                     y = 0;
 793                     result = true;
 794                     CalculateLineCountOnScreen();
 795                 }
 796                 else if (tp.row < this.Src.Row)
 797                 {
 798                     this.Document.Src = new SrcPoint(this.Document.Src.X, tp.row, tp.row * this.render.emSize.Height);
 799                     y = 0;
 800                     result = true;
 801                     CalculateLineCountOnScreen();
 802                 }
 803
 804                 if (caretRow > 0)
 805                 {
 806                     for (int i = 0; i < caretRow; i++)
 807                     {
 808                         int currentRow = this.Src.Row + i;
 809                         int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(currentRow);
 810                         int lineLength = this.LayoutLines.GetLengthFromLineNumber(currentRow);
 811
 812                         if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 813                             continue;
 814
 815                         y += this.LayoutLines.GetLayout(currentRow).Height;
 816                     }
 817                 }
 818                 y += this.render.TextArea.Y;
 819             }
 820
 821             this.SetCaretPostion(x, y);
 822
 823             if (result)
 824             {
 825                 this.OnSrcChanged(null);
 826             }
 827
 828             return result;
 829         }
 830
 831         int GetSrcRow(int row,int count)
 832         {
 833             if (this.LayoutLines.FoldingStrategy == null)
 834                 return row - count;
 835             for (int i = row; i >= 0; i--)
 836             {
 837                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 838                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 839                 if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 840                     continue;
 841                 if (count <= 0)
 842                     return i;
 843                 count--;
 844             }
 845             return 0;
 846         }
 847
 848         /// <summary>
 849         /// レイアウト行をテキストポイントからインデックスに変換する
 850         /// </summary>
 851         /// <param name="tp">テキストポイント表す</param>
 852         /// <returns>インデックスを返す</returns>
 853         public int GetIndexFromLayoutLine(TextPoint tp)
 854         {
 855             return this.LayoutLines.GetIndexFromTextPoint(tp);
 856         }
 857
 858         /// <summary>
 859         /// インデックスからレイアウト行を指し示すテキストポイントに変換する
 860         /// </summary>
 861         /// <param name="index">インデックスを表す</param>
 862         /// <returns>テキストポイント返す</returns>
 863         public TextPoint GetLayoutLineFromIndex(int index)
 864         {
 865             return this.LayoutLines.GetTextPointFromIndex(index);
 866         }
 867
 868         /// <summary>
 869         /// 指定した座標までスクロールする
 870         /// </summary>
 871         /// <param name="x"></param>
 872         /// <param name="row"></param>
 873         /// <remarks>
 874         /// 範囲外の座標を指定した場合、範囲内に収まるように調整されます
 875         /// </remarks>
 876         public void Scroll(double x, int row)
 877         {
 878             if (x < 0)
 879                 x = 0;
 880             if(row < 0)
 881                 row = 0;
 882             int endRow = this.LayoutLines.Count - 1 - this.LineCountOnScreen;
 883             if (endRow < 0)
 884                 endRow = 0;
 885             if (row > endRow)
 886                 row = endRow;
 887             base.TryScroll(x, row);
 888         }
 889
 890         /// <summary>
 891         /// 指定行までスクロールする
 892         /// </summary>
 893         /// <param name="row">行</param>
 894         /// <param name="alignTop">指定行を画面上に置くなら真。そうでないなら偽</param>
 895         public void ScrollIntoView(int row, bool alignTop)
 896         {
 897             this.Scroll(0, row);
 898             if (alignTop)
 899                 return;
 900             double y = this.render.TextArea.Height;
 901             for (int i = row; i >= 0; i--)
 902             {
 903                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(i);
 904                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(i);
 905                 double height = this.LayoutLines.GetLayout(i).Height;
 906                 if (y - height <= 0)
 907                 {
 908                     this.Scroll(0, i);
 909                 }
 910                 if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex))
 911                     continue;
 912                 y -= height;
 913             }
 914         }
 915
 916         public int AdjustRow(int row, bool isMoveNext)
 917         {
 918             if (this.LayoutLines.FoldingStrategy == null)
 919                 return row;
 920             int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(row);
 921             int lineLength = this.LayoutLines.GetLengthFromLineNumber(row);
 922             FoldingItem foldingData = this.LayoutLines.FoldingCollection.GetFarestHiddenFoldingData(lineHeadIndex, lineLength);
 923             if (foldingData != null && !foldingData.Expand)
 924             {
 925                 if (foldingData.End == this.Document.Length)
 926                     return row;
 927                 if (isMoveNext && lineHeadIndex > foldingData.Start)
 928                     row = this.LayoutLines.GetLineNumberFromIndex(foldingData.End) + 1;
 929                 else
 930                     row = this.LayoutLines.GetLineNumberFromIndex(foldingData.Start);
 931                 if(row > this.LayoutLines.Count - 1)
 932                     row = this.LayoutLines.GetLineNumberFromIndex(foldingData.Start);
 933             }
 934             return row;
 935         }
 936
 937         protected override void CalculateClipRect()
 938         {
 939             IEditorRender render = (IEditorRender)base.render;
 940             double x, y, width, height;
 941
 942             if (this.Document.DrawLineNumber)
 943             {
 944                 if (this.Document.RightToLeft)
 945                     x = this.Padding.Left;
 946                 else
 947                     x = this.Padding.Left + UpdateAreaTotalWidth + this.render.LineNemberWidth + this.LineNumberMargin + render.FoldingWidth;
 948                 width = this.PageBound.Width - this.render.LineNemberWidth - this.LineNumberMargin - this.Padding.Left - this.Padding.Right - render.FoldingWidth - UpdateAreaTotalWidth;
 949             }
 950             else
 951             {
 952                 if (this.Document.RightToLeft)
 953                     x = this.Padding.Left;
 954                 else
 955                     x = this.Padding.Left + UpdateAreaTotalWidth + render.FoldingWidth;
 956                 width = this.PageBound.Width - this.Padding.Left - this.Padding.Right - render.FoldingWidth - UpdateAreaTotalWidth;
 957             }
 958
 959             y = this.Padding.Top;
 960             height = this.PageBound.Height - this.Padding.Top - this.Padding.Bottom;
 961
 962             if (this.Document.HideRuler == false)
 963             {
 964                 double rulerHeight = this.render.emSize.Height + LineMarkerThickness;
 965                 y += rulerHeight;
 966                 height -= rulerHeight;
 967             }
 968
 969             if (width < 0)
 970                 width = 0;
 971
 972             if (height < 0)
 973                 height = 0;
 974
 975             this.render.TextArea = new Rectangle(x, y, width, height);
 976
 977             this.LineBreakingMarginWidth = width * 5 / 100;
 978         }
 979
 980         public override void CalculateLineCountOnScreen()
 981         {
 982             if (this.LayoutLines.Count == 0 || this.PageBound.Height == 0)
 983                 return;
 984
 985             double y = 0;
 986             int i = this.Src.Row;
 987             int visualCount = this.Src.Row;
 988             for (; true; i++)
 989             {
 990                 int row = i < this.LayoutLines.Count ? i : this.LayoutLines.Count - 1;
 991
 992                 int lineHeadIndex = this.LayoutLines.GetIndexFromLineNumber(row);
 993                 int lineLength = this.LayoutLines.GetLengthFromLineNumber(row);
 994
 995                 if (this.LayoutLines.FoldingCollection.IsHidden(lineHeadIndex) && row < this.LayoutLines.Count - 1)
 996                     continue;
 997
 998                 ITextLayout layout = this.LayoutLines.GetLayout(row);
 999
1000                 double width = layout.Width;
1001
1002                 if (width > this._LongestWidth)
1003                     this._LongestWidth = width;
1004
1005                 double lineHeight = layout.Height;
1006
1007                 y += lineHeight;
1008
1009                 if (y >= this.render.TextArea.Height)
1010                     break;
1011                 visualCount++;
1012             }
1013             this.LineCountOnScreen = Math.Max(visualCount - this.Src.Row - 1, 0);
1014             this.LineCountOnScreenWithInVisible = Math.Max(i - this.Src.Row - 1, 0);
1015         }
1016
1017         void SetCaretPostion(double x, double y)
1018         {
1019             this.CaretLocation = new Point(x + this.PageBound.X, y + this.PageBound.Y);
1020         }
1021
1022         void FoldingCollection_StatusChanged(object sender, FoldingItemStatusChangedEventArgs e)
1023         {
1024             this.CalculateLineCountOnScreen();
1025         }
1026
1027         enum AreaType
1028         {
1029             UpdateArea,
1030             FoldingArea,
1031             LineNumberArea,
1032             TextArea
1033         }
1034
1035         double GetRealtiveX(AreaType type)
1036         {
1037             IEditorRender render = (IEditorRender)base.render;
1038             switch (type)
1039             {
1040                 case AreaType.UpdateArea:
1041                     if (this.Document.RightToLeft)
1042                         return this.PageBound.TopRight.X - UpdateAreaTotalWidth;
1043                     if (this.Document.DrawLineNumber)
1044                         return this.render.TextArea.X - this.render.LineNemberWidth - this.LineNumberMargin - render.FoldingWidth - UpdateAreaTotalWidth;
1045                     else
1046                         return this.render.TextArea.X - render.FoldingWidth - UpdateAreaTotalWidth;
1047                 case AreaType.FoldingArea:
1048                     if (this.Document.RightToLeft)
1049                         return this.PageBound.TopRight.X - render.FoldingWidth;
1050                     if (this.Document.DrawLineNumber)
1051                         return this.render.TextArea.X - this.render.LineNemberWidth - this.LineNumberMargin - render.FoldingWidth;
1052                     else
1053                         return this.render.TextArea.X - render.FoldingWidth;
1054                 case AreaType.LineNumberArea:
1055                     if (this.Document.DrawLineNumber == false)
1056                         throw new InvalidOperationException();
1057                     if (this.Document.RightToLeft)
1058                         return this.PageBound.TopRight.X - UpdateAreaTotalWidth - render.FoldingWidth - this.render.LineNemberWidth;
1059                     else
1060                         return this.render.TextArea.X - this.render.LineNemberWidth - this.LineNumberMargin;
1061                 case AreaType.TextArea:
1062                     return this.render.TextArea.X;
1063             }
1064             throw new ArgumentOutOfRangeException();
1065         }
1066     }
1067 }