cmd/micro/view.go

   1 package main
   2
   3 import (
   4         "reflect"
   5         "runtime"
   6         "strconv"
   7         "strings"
   8         "time"
   9
  10         "github.com/mattn/go-runewidth"
  11         "github.com/zyedidia/tcell"
  12 )
  13
  14 // The View struct stores information about a view into a buffer.
  15 // It stores information about the cursor, and the viewport
  16 // that the user sees the buffer from.
  17 type View struct {
  18         // A pointer to the buffer's cursor for ease of access
  19         Cursor *Cursor
  20
  21         // The topmost line, used for vertical scrolling
  22         Topline int
  23         // The leftmost column, used for horizontal scrolling
  24         leftCol int
  25
  26         // Percentage of the terminal window that this view takes up (from 0 to 100)
  27         widthPercent  int
  28         heightPercent int
  29
  30         // Actual with and height
  31         width  int
  32         height int
  33
  34         // Where this view is located
  35         x, y int
  36
  37         // How much to offset because of line numbers
  38         lineNumOffset int
  39
  40         // Holds the list of gutter messages
  41         messages map[string][]GutterMessage
  42
  43         // Is the help text opened in this view
  44         helpOpen bool
  45
  46         // This is the index of this view in the views array
  47         Num int
  48         // What tab is this view stored in
  49         TabNum int
  50
  51         // Is this view modifiable?
  52         Modifiable bool
  53
  54         // The buffer
  55         Buf *Buffer
  56         // This is the buffer that was last opened
  57         // This is used to open help, and then go back to the previously opened buffer
  58         lastBuffer *Buffer
  59         // The statusline
  60         sline Statusline
  61
  62         // Since tcell doesn't differentiate between a mouse release event
  63         // and a mouse move event with no keys pressed, we need to keep
  64         // track of whether or not the mouse was pressed (or not released) last event to determine
  65         // mouse release events
  66         mouseReleased bool
  67
  68         // This stores when the last click was
  69         // This is useful for detecting double and triple clicks
  70         lastClickTime time.Time
  71
  72         // lastCutTime stores when the last ctrl+k was issued.
  73         // It is used for clearing the clipboard to replace it with fresh cut lines.
  74         lastCutTime time.Time
  75
  76         // freshClip returns true if the clipboard has never been pasted.
  77         freshClip bool
  78
  79         // Was the last mouse event actually a double click?
  80         // Useful for detecting triple clicks -- if a double click is detected
  81         // but the last mouse event was actually a double click, it's a triple click
  82         doubleClick bool
  83         // Same here, just to keep track for mouse move events
  84         tripleClick bool
  85
  86         // Syntax highlighting matches
  87         matches SyntaxMatches
  88         // The matches from the last frame
  89         lastMatches SyntaxMatches
  90 }
  91
  92 // NewView returns a new fullscreen view
  93 func NewView(buf *Buffer) *View {
  94         return NewViewWidthHeight(buf, 100, 100)
  95 }
  96
  97 // NewViewWidthHeight returns a new view with the specified width and height percentages
  98 // Note that w and h are percentages not actual values
  99 func NewViewWidthHeight(buf *Buffer, w, h int) *View {
 100         v := new(View)
 101
 102         v.x, v.y = 0, 0
 103
 104         v.widthPercent = w
 105         v.heightPercent = h
 106         v.Resize(screen.Size())
 107
 108         v.OpenBuffer(buf)
 109
 110         v.messages = make(map[string][]GutterMessage)
 111
 112         v.sline = Statusline{
 113                 view: v,
 114         }
 115
 116         return v
 117 }
 118
 119 // Resize recalculates the actual width and height of the view from the width and height
 120 // percentages
 121 // This is usually called when the window is resized, or when a split has been added and
 122 // the percentages have changed
 123 func (v *View) Resize(w, h int) {
 124         // Always include 1 line for the command line at the bottom
 125         h--
 126         if len(tabs) > 1 {
 127                 // Include one line for the tab bar at the top
 128                 h--
 129                 v.y = 1
 130         } else {
 131                 v.y = 0
 132         }
 133         v.width = int(float32(w) * float32(v.widthPercent) / 100)
 134         // We subtract 1 for the statusline
 135         v.height = int(float32(h) * float32(v.heightPercent) / 100)
 136         if settings["statusline"].(bool) {
 137                 // Make room for the status line if it is enabled
 138                 v.height--
 139         }
 140 }
 141
 142 // ScrollUp scrolls the view up n lines (if possible)
 143 func (v *View) ScrollUp(n int) {
 144         // Try to scroll by n but if it would overflow, scroll by 1
 145         if v.Topline-n >= 0 {
 146                 v.Topline -= n
 147         } else if v.Topline > 0 {
 148                 v.Topline--
 149         }
 150 }
 151
 152 // ScrollDown scrolls the view down n lines (if possible)
 153 func (v *View) ScrollDown(n int) {
 154         // Try to scroll by n but if it would overflow, scroll by 1
 155         if v.Topline+n <= v.Buf.NumLines-v.height {
 156                 v.Topline += n
 157         } else if v.Topline < v.Buf.NumLines-v.height {
 158                 v.Topline++
 159         }
 160 }
 161
 162 // CanClose returns whether or not the view can be closed
 163 // If there are unsaved changes, the user will be asked if the view can be closed
 164 // causing them to lose the unsaved changes
 165 // The message is what to print after saying "You have unsaved changes. "
 166 func (v *View) CanClose(msg string) bool {
 167         if v.Buf.IsModified {
 168                 quit, canceled := messenger.Prompt("You have unsaved changes. "+msg, "Unsaved", NoCompletion)
 169                 if !canceled {
 170                         if strings.ToLower(quit) == "yes" || strings.ToLower(quit) == "y" {
 171                                 return true
 172                         } else if strings.ToLower(quit) == "save" || strings.ToLower(quit) == "s" {
 173                                 v.Save()
 174                                 return true
 175                         }
 176                 }
 177         } else {
 178                 return true
 179         }
 180         return false
 181 }
 182
 183 // OpenBuffer opens a new buffer in this view.
 184 // This resets the topline, event handler and cursor.
 185 func (v *View) OpenBuffer(buf *Buffer) {
 186         screen.Clear()
 187         v.CloseBuffer()
 188         v.Buf = buf
 189         v.Cursor = &buf.Cursor
 190         v.Topline = 0
 191         v.leftCol = 0
 192         v.Cursor.ResetSelection()
 193         v.Relocate()
 194         v.messages = make(map[string][]GutterMessage)
 195
 196         v.matches = Match(v)
 197
 198         // Set mouseReleased to true because we assume the mouse is not being pressed when
 199         // the editor is opened
 200         v.mouseReleased = true
 201         v.lastClickTime = time.Time{}
 202 }
 203
 204 // CloseBuffer performs any closing functions on the buffer
 205 func (v *View) CloseBuffer() {
 206         if v.Buf != nil {
 207                 v.Buf.Serialize()
 208         }
 209 }
 210
 211 // ReOpen reloads the current buffer
 212 func (v *View) ReOpen() {
 213         if v.CanClose("Continue? (yes, no, save) ") {
 214                 screen.Clear()
 215                 v.Buf.ReOpen()
 216                 v.Relocate()
 217                 v.matches = Match(v)
 218         }
 219 }
 220
 221 // Relocate moves the view window so that the cursor is in view
 222 // This is useful if the user has scrolled far away, and then starts typing
 223 func (v *View) Relocate() bool {
 224         ret := false
 225         cy := v.Cursor.Y
 226         scrollmargin := int(settings["scrollmargin"].(float64))
 227         if cy < v.Topline+scrollmargin && cy > scrollmargin-1 {
 228                 v.Topline = cy - scrollmargin
 229                 ret = true
 230         } else if cy < v.Topline {
 231                 v.Topline = cy
 232                 ret = true
 233         }
 234         if cy > v.Topline+v.height-1-scrollmargin && cy < v.Buf.NumLines-scrollmargin {
 235                 v.Topline = cy - v.height + 1 + scrollmargin
 236                 ret = true
 237         } else if cy >= v.Buf.NumLines-scrollmargin && cy > v.height {
 238                 v.Topline = v.Buf.NumLines - v.height
 239                 ret = true
 240         }
 241
 242         cx := v.Cursor.GetVisualX()
 243         if cx < v.leftCol {
 244                 v.leftCol = cx
 245                 ret = true
 246         }
 247         if cx+v.lineNumOffset+1 > v.leftCol+v.width {
 248                 v.leftCol = cx - v.width + v.lineNumOffset + 1
 249                 ret = true
 250         }
 251         return ret
 252 }
 253
 254 // MoveToMouseClick moves the cursor to location x, y assuming x, y were given
 255 // by a mouse click
 256 func (v *View) MoveToMouseClick(x, y int) {
 257         if y-v.Topline > v.height-1 {
 258                 v.ScrollDown(1)
 259                 y = v.height + v.Topline - 1
 260         }
 261         if y >= v.Buf.NumLines {
 262                 y = v.Buf.NumLines - 1
 263         }
 264         if y < 0 {
 265                 y = 0
 266         }
 267         if x < 0 {
 268                 x = 0
 269         }
 270
 271         x = v.Cursor.GetCharPosInLine(y, x)
 272         if x > Count(v.Buf.Line(y)) {
 273                 x = Count(v.Buf.Line(y))
 274         }
 275         v.Cursor.X = x
 276         v.Cursor.Y = y
 277         v.Cursor.LastVisualX = v.Cursor.GetVisualX()
 278 }
 279
 280 // HandleEvent handles an event passed by the main loop
 281 func (v *View) HandleEvent(event tcell.Event) {
 282         // This bool determines whether the view is relocated at the end of the function
 283         // By default it's true because most events should cause a relocate
 284         relocate := true
 285
 286         v.Buf.CheckModTime()
 287
 288         switch e := event.(type) {
 289         case *tcell.EventResize:
 290                 // Window resized
 291                 v.Resize(e.Size())
 292         case *tcell.EventKey:
 293                 if e.Key() == tcell.KeyRune && (e.Modifiers() == 0 || e.Modifiers() == tcell.ModShift) {
 294                         // Insert a character
 295                         if v.Cursor.HasSelection() {
 296                                 v.Cursor.DeleteSelection()
 297                                 v.Cursor.ResetSelection()
 298                         }
 299                         v.Buf.Insert(v.Cursor.Loc, string(e.Rune()))
 300                         v.Cursor.Right()
 301                 } else {
 302                         for key, actions := range bindings {
 303                                 if e.Key() == key.keyCode {
 304                                         if e.Key() == tcell.KeyRune {
 305                                                 if e.Rune() != key.r {
 306                                                         continue
 307                                                 }
 308                                         }
 309                                         if e.Modifiers() == key.modifiers {
 310                                                 relocate = false
 311                                                 for _, action := range actions {
 312                                                         relocate = action(v) || relocate
 313                                                         for _, pl := range loadedPlugins {
 314                                                                 funcName := strings.Split(runtime.FuncForPC(reflect.ValueOf(action).Pointer()).Name(), ".")
 315                                                                 err := Call(pl+"_on"+funcName[len(funcName)-1], nil)
 316                                                                 if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
 317                                                                         TermMessage(err)
 318                                                                 }
 319                                                         }
 320                                                 }
 321                                         }
 322                                 }
 323                         }
 324                 }
 325         case *tcell.EventPaste:
 326                 if v.Cursor.HasSelection() {
 327                         v.Cursor.DeleteSelection()
 328                         v.Cursor.ResetSelection()
 329                 }
 330                 clip := e.Text()
 331                 v.Buf.Insert(v.Cursor.Loc, clip)
 332                 v.Cursor.Loc = v.Cursor.Loc.Move(Count(clip), v.Buf)
 333                 v.freshClip = false
 334         case *tcell.EventMouse:
 335                 x, y := e.Position()
 336                 x -= v.lineNumOffset - v.leftCol
 337                 y += v.Topline - v.y
 338                 // Don't relocate for mouse events
 339                 relocate = false
 340
 341                 button := e.Buttons()
 342
 343                 switch button {
 344                 case tcell.Button1:
 345                         // Left click
 346                         if v.mouseReleased {
 347                                 v.MoveToMouseClick(x, y)
 348                                 if time.Since(v.lastClickTime)/time.Millisecond < doubleClickThreshold {
 349                                         if v.doubleClick {
 350                                                 // Triple click
 351                                                 v.lastClickTime = time.Now()
 352
 353                                                 v.tripleClick = true
 354                                                 v.doubleClick = false
 355
 356                                                 v.Cursor.SelectLine()
 357                                         } else {
 358                                                 // Double click
 359                                                 v.lastClickTime = time.Now()
 360
 361                                                 v.doubleClick = true
 362                                                 v.tripleClick = false
 363
 364                                                 v.Cursor.SelectWord()
 365                                         }
 366                                 } else {
 367                                         v.doubleClick = false
 368                                         v.tripleClick = false
 369                                         v.lastClickTime = time.Now()
 370
 371                                         v.Cursor.OrigSelection[0] = v.Cursor.Loc
 372                                         v.Cursor.CurSelection[0] = v.Cursor.Loc
 373                                         v.Cursor.CurSelection[1] = v.Cursor.Loc
 374                                 }
 375                                 v.mouseReleased = false
 376                         } else if !v.mouseReleased {
 377                                 v.MoveToMouseClick(x, y)
 378                                 if v.tripleClick {
 379                                         v.Cursor.AddLineToSelection()
 380                                 } else if v.doubleClick {
 381                                         v.Cursor.AddWordToSelection()
 382                                 } else {
 383                                         v.Cursor.CurSelection[1] = v.Cursor.Loc
 384                                 }
 385                         }
 386                 case tcell.ButtonNone:
 387                         // Mouse event with no click
 388                         if !v.mouseReleased {
 389                                 // Mouse was just released
 390
 391                                 // Relocating here isn't really necessary because the cursor will
 392                                 // be in the right place from the last mouse event
 393                                 // However, if we are running in a terminal that doesn't support mouse motion
 394                                 // events, this still allows the user to make selections, except only after they
 395                                 // release the mouse
 396
 397                                 if !v.doubleClick && !v.tripleClick {
 398                                         v.MoveToMouseClick(x, y)
 399                                         v.Cursor.CurSelection[1] = v.Cursor.Loc
 400                                 }
 401                                 v.mouseReleased = true
 402                         }
 403                 case tcell.WheelUp:
 404                         // Scroll up
 405                         scrollspeed := int(settings["scrollspeed"].(float64))
 406                         v.ScrollUp(scrollspeed)
 407                 case tcell.WheelDown:
 408                         // Scroll down
 409                         scrollspeed := int(settings["scrollspeed"].(float64))
 410                         v.ScrollDown(scrollspeed)
 411                 }
 412         }
 413
 414         if relocate {
 415                 v.Relocate()
 416         }
 417         if settings["syntax"].(bool) {
 418                 v.matches = Match(v)
 419         }
 420 }
 421
 422 // GutterMessage creates a message in this view's gutter
 423 func (v *View) GutterMessage(section string, lineN int, msg string, kind int) {
 424         lineN--
 425         gutterMsg := GutterMessage{
 426                 lineNum: lineN,
 427                 msg:     msg,
 428                 kind:    kind,
 429         }
 430         for _, v := range v.messages {
 431                 for _, gmsg := range v {
 432                         if gmsg.lineNum == lineN {
 433                                 return
 434                         }
 435                 }
 436         }
 437         messages := v.messages[section]
 438         v.messages[section] = append(messages, gutterMsg)
 439 }
 440
 441 // ClearGutterMessages clears all gutter messages from a given section
 442 func (v *View) ClearGutterMessages(section string) {
 443         v.messages[section] = []GutterMessage{}
 444 }
 445
 446 // ClearAllGutterMessages clears all the gutter messages
 447 func (v *View) ClearAllGutterMessages() {
 448         for k := range v.messages {
 449                 v.messages[k] = []GutterMessage{}
 450         }
 451 }
 452
 453 // DisplayView renders the view to the screen
 454 func (v *View) DisplayView() {
 455         // The character number of the character in the top left of the screen
 456         charNum := Loc{0, v.Topline}
 457
 458         // Convert the length of buffer to a string, and get the length of the string
 459         // We are going to have to offset by that amount
 460         maxLineLength := len(strconv.Itoa(v.Buf.NumLines))
 461         // + 1 for the little space after the line number
 462         if settings["ruler"] == true {
 463                 v.lineNumOffset = maxLineLength + 1
 464         } else {
 465                 v.lineNumOffset = 0
 466         }
 467         highlightStyle := defStyle
 468
 469         var hasGutterMessages bool
 470         for _, v := range v.messages {
 471                 if len(v) > 0 {
 472                         hasGutterMessages = true
 473                 }
 474         }
 475         if hasGutterMessages {
 476                 v.lineNumOffset += 2
 477         }
 478
 479         for lineN := 0; lineN < v.height; lineN++ {
 480                 x := v.x
 481                 // If the buffer is smaller than the view height
 482                 if lineN+v.Topline >= v.Buf.NumLines {
 483                         // We have to clear all this space
 484                         for i := 0; i < v.width; i++ {
 485                                 screen.SetContent(i, lineN+v.y, ' ', nil, defStyle)
 486                         }
 487
 488                         continue
 489                 }
 490                 line := v.Buf.Line(lineN + v.Topline)
 491
 492                 if hasGutterMessages {
 493                         msgOnLine := false
 494                         for k := range v.messages {
 495                                 for _, msg := range v.messages[k] {
 496                                         if msg.lineNum == lineN+v.Topline {
 497                                                 msgOnLine = true
 498                                                 gutterStyle := defStyle
 499                                                 switch msg.kind {
 500                                                 case GutterInfo:
 501                                                         if style, ok := colorscheme["gutter-info"]; ok {
 502                                                                 gutterStyle = style
 503                                                         }
 504                                                 case GutterWarning:
 505                                                         if style, ok := colorscheme["gutter-warning"]; ok {
 506                                                                 gutterStyle = style
 507                                                         }
 508                                                 case GutterError:
 509                                                         if style, ok := colorscheme["gutter-error"]; ok {
 510                                                                 gutterStyle = style
 511                                                         }
 512                                                 }
 513                                                 screen.SetContent(x, lineN+v.y, '>', nil, gutterStyle)
 514                                                 x++
 515                                                 screen.SetContent(x, lineN+v.y, '>', nil, gutterStyle)
 516                                                 x++
 517                                                 if v.Cursor.Y == lineN+v.Topline {
 518                                                         messenger.Message(msg.msg)
 519                                                         messenger.gutterMessage = true
 520                                                 }
 521                                         }
 522                                 }
 523                         }
 524                         if !msgOnLine {
 525                                 screen.SetContent(x, lineN+v.y, ' ', nil, defStyle)
 526                                 x++
 527                                 screen.SetContent(x, lineN+v.y, ' ', nil, defStyle)
 528                                 x++
 529                                 if v.Cursor.Y == lineN+v.Topline && messenger.gutterMessage {
 530                                         messenger.Reset()
 531                                         messenger.gutterMessage = false
 532                                 }
 533                         }
 534                 }
 535
 536                 // Write the line number
 537                 lineNumStyle := defStyle
 538                 if style, ok := colorscheme["line-number"]; ok {
 539                         lineNumStyle = style
 540                 }
 541                 // Write the spaces before the line number if necessary
 542                 var lineNum string
 543                 if settings["ruler"] == true {
 544                         lineNum = strconv.Itoa(lineN + v.Topline + 1)
 545                         for i := 0; i < maxLineLength-len(lineNum); i++ {
 546                                 screen.SetContent(x, lineN+v.y, ' ', nil, lineNumStyle)
 547                                 x++
 548                         }
 549                         // Write the actual line number
 550                         for _, ch := range lineNum {
 551                                 screen.SetContent(x, lineN+v.y, ch, nil, lineNumStyle)
 552                                 x++
 553                         }
 554
 555                         if settings["ruler"] == true {
 556                                 // Write the extra space
 557                                 screen.SetContent(x, lineN+v.y, ' ', nil, lineNumStyle)
 558                                 x++
 559                         }
 560                 }
 561                 // Write the line
 562                 for colN, ch := range line {
 563                         lineStyle := defStyle
 564
 565                         if settings["syntax"].(bool) {
 566                                 // Syntax highlighting is enabled
 567                                 highlightStyle = v.matches[lineN][colN]
 568                         }
 569
 570                         if v.Cursor.HasSelection() &&
 571                                 (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
 572                                         charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
 573
 574                                 lineStyle = defStyle.Reverse(true)
 575
 576                                 if style, ok := colorscheme["selection"]; ok {
 577                                         lineStyle = style
 578                                 }
 579                         } else {
 580                                 lineStyle = highlightStyle
 581                         }
 582
 583                         if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
 584                                 if style, ok := colorscheme["cursor-line"]; ok {
 585                                         fg, _, _ := style.Decompose()
 586                                         lineStyle = lineStyle.Background(fg)
 587                                 }
 588                         }
 589
 590                         if ch == '\t' {
 591                                 lineIndentStyle := defStyle
 592                                 if style, ok := colorscheme["indent-char"]; ok {
 593                                         lineIndentStyle = style
 594                                 }
 595                                 if v.Cursor.HasSelection() &&
 596                                         (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
 597                                                 charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
 598
 599                                         lineIndentStyle = defStyle.Reverse(true)
 600
 601                                         if style, ok := colorscheme["selection"]; ok {
 602                                                 lineIndentStyle = style
 603                                         }
 604                                 }
 605                                 if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
 606                                         if style, ok := colorscheme["cursor-line"]; ok {
 607                                                 fg, _, _ := style.Decompose()
 608                                                 lineIndentStyle = lineIndentStyle.Background(fg)
 609                                         }
 610                                 }
 611                                 indentChar := []rune(settings["indentchar"].(string))
 612                                 if x-v.leftCol >= v.lineNumOffset {
 613                                         screen.SetContent(x-v.leftCol, lineN+v.y, indentChar[0], nil, lineIndentStyle)
 614                                 }
 615                                 tabSize := int(settings["tabsize"].(float64))
 616                                 for i := 0; i < tabSize-1; i++ {
 617                                         x++
 618                                         if x-v.leftCol >= v.lineNumOffset {
 619                                                 screen.SetContent(x-v.leftCol, lineN+v.y, ' ', nil, lineStyle)
 620                                         }
 621                                 }
 622                         } else if runewidth.RuneWidth(ch) > 1 {
 623                                 if x-v.leftCol >= v.lineNumOffset {
 624                                         screen.SetContent(x-v.leftCol, lineN, ch, nil, lineStyle)
 625                                 }
 626                                 for i := 0; i < runewidth.RuneWidth(ch)-1; i++ {
 627                                         x++
 628                                         if x-v.leftCol >= v.lineNumOffset {
 629                                                 screen.SetContent(x-v.leftCol, lineN, ' ', nil, lineStyle)
 630                                         }
 631                                 }
 632                         } else {
 633                                 if x-v.leftCol >= v.lineNumOffset {
 634                                         screen.SetContent(x-v.leftCol, lineN+v.y, ch, nil, lineStyle)
 635                                 }
 636                         }
 637                         charNum = charNum.Move(1, v.Buf)
 638                         x++
 639                 }
 640                 // Here we are at a newline
 641
 642                 // The newline may be selected, in which case we should draw the selection style
 643                 // with a space to represent it
 644                 if v.Cursor.HasSelection() &&
 645                         (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
 646                                 charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
 647
 648                         selectStyle := defStyle.Reverse(true)
 649
 650                         if style, ok := colorscheme["selection"]; ok {
 651                                 selectStyle = style
 652                         }
 653                         screen.SetContent(x-v.leftCol, lineN+v.y, ' ', nil, selectStyle)
 654                         x++
 655                 }
 656
 657                 charNum = charNum.Move(1, v.Buf)
 658
 659                 for i := 0; i < v.width-(x-v.leftCol); i++ {
 660                         lineStyle := defStyle
 661                         if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
 662                                 if style, ok := colorscheme["cursor-line"]; ok {
 663                                         fg, _, _ := style.Decompose()
 664                                         lineStyle = lineStyle.Background(fg)
 665                                 }
 666                         }
 667                         if !(x-v.leftCol < v.lineNumOffset) {
 668                                 screen.SetContent(x+i, lineN+v.y, ' ', nil, lineStyle)
 669                         }
 670                 }
 671         }
 672 }
 673
 674 // DisplayCursor draws the current buffer's cursor to the screen
 675 func (v *View) DisplayCursor() {
 676         // Don't draw the cursor if it is out of the viewport or if it has a selection
 677         if (v.Cursor.Y-v.Topline < 0 || v.Cursor.Y-v.Topline > v.height-1) || v.Cursor.HasSelection() {
 678                 screen.HideCursor()
 679         } else {
 680                 screen.ShowCursor(v.x+v.Cursor.GetVisualX()+v.lineNumOffset-v.leftCol, v.Cursor.Y-v.Topline+v.y)
 681         }
 682 }
 683
 684 // Display renders the view, the cursor, and statusline
 685 func (v *View) Display() {
 686         v.DisplayView()
 687         v.DisplayCursor()
 688         if settings["statusline"].(bool) {
 689                 v.sline.Display()
 690         }
 691 }