More actions and view relocation

cmd/micro/action/actions.go

@@ -2,8 +2,10 @@ package action
 
 import (
 	"os"
+	"time"
 	"unicode/utf8"
 
+	"github.com/zyedidia/clipboard"
 	"github.com/zyedidia/micro/cmd/micro/buffer"
 	"github.com/zyedidia/micro/cmd/micro/screen"
 	"github.com/zyedidia/micro/cmd/micro/util"
@@ -18,11 +20,21 @@ func (h *BufHandler) MousePress(e *tcell.EventMouse) bool {
 
 // ScrollUpAction scrolls the view up
 func (h *BufHandler) ScrollUpAction() bool {
+	b := h.Buf
+	sspeed := b.Settings["scrollspeed"].(int)
+	if h.Win.StartLine >= sspeed {
+		h.Win.StartLine -= sspeed
+	}
 	return false
 }
 
 // ScrollDownAction scrolls the view up
 func (h *BufHandler) ScrollDownAction() bool {
+	b := h.Buf
+	sspeed := b.Settings["scrollspeed"].(int)
+	if h.Win.StartLine <= h.Buf.LinesNum()-1-sspeed {
+		h.Win.StartLine += sspeed
+	}
 	return false
 }
 
@@ -358,12 +370,12 @@ func (h *BufHandler) IndentSelection() bool {
 		tabsize := int(h.Buf.Settings["tabsize"].(float64))
 		indentsize := len(h.Buf.IndentString(tabsize))
 		for y := startY; y <= endY; y++ {
-			h.Buf.Insert(buffer.Loc{0, y}, h.Buf.IndentString(tabsize))
+			h.Buf.Insert(buffer.Loc{X: 0, Y: y}, h.Buf.IndentString(tabsize))
 			if y == startY && start.X > 0 {
 				h.Cursor.SetSelectionStart(start.Move(indentsize, h.Buf))
 			}
 			if y == endY {
-				h.Cursor.SetSelectionEnd(buffer.Loc{endX + indentsize + 1, endY})
+				h.Cursor.SetSelectionEnd(buffer.Loc{X: endX + indentsize + 1, Y: endY})
 			}
 		}
 		h.Cursor.Relocate()
@@ -371,21 +383,58 @@ func (h *BufHandler) IndentSelection() bool {
 		return true
 	}
 	return false
-	return false
 }
 
 // OutdentLine moves the current line back one indentation
 func (h *BufHandler) OutdentLine() bool {
+	if h.Cursor.HasSelection() {
+		return false
+	}
+
+	for x := 0; x < len(h.Buf.IndentString(h.Buf.Settings["tabsize"].(int))); x++ {
+		if len(util.GetLeadingWhitespace(h.Buf.LineBytes(h.Cursor.Y))) == 0 {
+			break
+		}
+		h.Buf.Remove(buffer.Loc{X: 0, Y: h.Cursor.Y}, buffer.Loc{X: 1, Y: h.Cursor.Y})
+	}
+	h.Cursor.Relocate()
 	return true
 }
 
 // OutdentSelection takes the current selection and moves it back one indent level
 func (h *BufHandler) OutdentSelection() bool {
-	return true
+	if h.Cursor.HasSelection() {
+		start := h.Cursor.CurSelection[0]
+		end := h.Cursor.CurSelection[1]
+		if end.Y < start.Y {
+			start, end = end, start
+			h.Cursor.SetSelectionStart(start)
+			h.Cursor.SetSelectionEnd(end)
+		}
+
+		startY := start.Y
+		endY := end.Move(-1, h.Buf).Y
+		for y := startY; y <= endY; y++ {
+			for x := 0; x < len(h.Buf.IndentString(h.Buf.Settings["tabsize"].(int))); x++ {
+				if len(util.GetLeadingWhitespace(h.Buf.LineBytes(y))) == 0 {
+					break
+				}
+				h.Buf.Remove(buffer.Loc{X: 0, Y: y}, buffer.Loc{X: 1, Y: y})
+			}
+		}
+		h.Cursor.Relocate()
+
+		return true
+	}
+	return false
 }
 
 // InsertTab inserts a tab or spaces
 func (h *BufHandler) InsertTab() bool {
+	indent := h.Buf.IndentString(h.Buf.Settings["tabsize"].(int))
+	tabBytes := len(indent)
+	bytesUntilIndent := tabBytes - (h.Cursor.GetVisualX() % tabBytes)
+	h.Buf.Insert(h.Cursor.Loc, indent[:bytesUntilIndent])
 	return true
 }
 
@@ -422,36 +471,91 @@ func (h *BufHandler) FindPrevious() bool {
 
 // Undo undoes the last action
 func (h *BufHandler) Undo() bool {
+	// TODO: clear cursors and message
+	h.Buf.Undo()
 	return true
 }
 
 // Redo redoes the last action
 func (h *BufHandler) Redo() bool {
+	// TODO: clear cursors and message
+	h.Buf.Redo()
 	return true
 }
 
 // Copy the selection to the system clipboard
 func (h *BufHandler) Copy() bool {
+	if h.Cursor.HasSelection() {
+		h.Cursor.CopySelection("clipboard")
+		h.freshClip = true
+		// TODO: message
+	}
 	return true
 }
 
 // CutLine cuts the current line to the clipboard
 func (h *BufHandler) CutLine() bool {
+	h.Cursor.SelectLine()
+	if !h.Cursor.HasSelection() {
+		return false
+	}
+	if h.freshClip == true {
+		if h.Cursor.HasSelection() {
+			if clip, err := clipboard.ReadAll("clipboard"); err != nil {
+				// messenger.Error(err)
+			} else {
+				clipboard.WriteAll(clip+string(h.Cursor.GetSelection()), "clipboard")
+			}
+		}
+	} else if time.Since(h.lastCutTime)/time.Second > 10*time.Second || h.freshClip == false {
+		h.Copy()
+	}
+	h.freshClip = true
+	h.lastCutTime = time.Now()
+	h.Cursor.DeleteSelection()
+	h.Cursor.ResetSelection()
+	// messenger.Message("Cut line")
 	return true
 }
 
 // Cut the selection to the system clipboard
 func (h *BufHandler) Cut() bool {
-	return true
+	if h.Cursor.HasSelection() {
+		h.Cursor.CopySelection("clipboard")
+		h.Cursor.DeleteSelection()
+		h.Cursor.ResetSelection()
+		h.freshClip = true
+		// messenger.Message("Cut selection")
+
+		return true
+	} else {
+		return h.CutLine()
+	}
 }
 
 // DuplicateLine duplicates the current line or selection
 func (h *BufHandler) DuplicateLine() bool {
+	if h.Cursor.HasSelection() {
+		h.Buf.Insert(h.Cursor.CurSelection[1], string(h.Cursor.GetSelection()))
+	} else {
+		h.Cursor.End()
+		h.Buf.Insert(h.Cursor.Loc, "\n"+string(h.Buf.LineBytes(h.Cursor.Y)))
+		// h.Cursor.Right()
+	}
+
+	// messenger.Message("Duplicated line")
 	return true
 }
 
 // DeleteLine deletes the current line
 func (h *BufHandler) DeleteLine() bool {
+	h.Cursor.SelectLine()
+	if !h.Cursor.HasSelection() {
+		return false
+	}
+	h.Cursor.DeleteSelection()
+	h.Cursor.ResetSelection()
+	// messenger.Message("Deleted line")
 	return true
 }
 
@@ -484,6 +588,11 @@ func (h *BufHandler) JumpToMatchingBrace() bool {
 
 // SelectAll selects the entire buffer
 func (h *BufHandler) SelectAll() bool {
+	h.Cursor.SetSelectionStart(h.Buf.Start())
+	h.Cursor.SetSelectionEnd(h.Buf.End())
+	// Put the cursor at the beginning
+	h.Cursor.X = 0
+	h.Cursor.Y = 0
 	return true
 }
 
@@ -494,11 +603,18 @@ func (h *BufHandler) OpenFile() bool {
 
 // Start moves the viewport to the start of the buffer
 func (h *BufHandler) Start() bool {
+	h.Win.StartLine = 0
 	return false
 }
 
 // End moves the viewport to the end of the buffer
 func (h *BufHandler) End() bool {
+	// TODO: softwrap problems?
+	if h.Win.Height > h.Buf.LinesNum() {
+		h.Win.StartLine = 0
+	} else {
+		h.StartLine = h.Buf.LinesNum() - h.Win.Height
+	}
 	return false
 }
 
@@ -544,6 +660,13 @@ func (h *BufHandler) HalfPageDown() bool {
 
 // ToggleRuler turns line numbers off and on
 func (h *BufHandler) ToggleRuler() bool {
+	if !h.Buf.Settings["ruler"].(bool) {
+		h.Buf.Settings["ruler"] = true
+		// messenger.Message("Enabled ruler")
+	} else {
+		h.Buf.Settings["ruler"] = false
+		// messenger.Message("Disabled ruler")
+	}
 	return false
 }
 

cmd/micro/action/bufhandler.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"github.com/zyedidia/micro/cmd/micro/buffer"
+	"github.com/zyedidia/micro/cmd/micro/display"
 	"github.com/zyedidia/micro/cmd/micro/util"
 	"github.com/zyedidia/tcell"
 )
@@ -46,6 +47,7 @@ func BufMapMouse(k MouseEvent, action string) {
 // visual positions for mouse clicks and scrolling
 type BufHandler struct {
 	Buf *buffer.Buffer
+	Win *display.BufWindow
 
 	cursors []*buffer.Cursor
 	Cursor  *buffer.Cursor // the active cursor
@@ -81,9 +83,10 @@ type BufHandler struct {
 	tripleClick bool
 }
 
-func NewBufHandler(buf *buffer.Buffer) *BufHandler {
+func NewBufHandler(buf *buffer.Buffer, win *display.BufWindow) *BufHandler {
 	h := new(BufHandler)
 	h.Buf = buf
+	h.Win = win
 
 	h.cursors = []*buffer.Cursor{buffer.NewCursor(buf, buf.StartCursor)}
 	h.Cursor = h.cursors[0]
@@ -117,7 +120,9 @@ func (h *BufHandler) HandleEvent(event tcell.Event) {
 
 func (h *BufHandler) DoKeyEvent(e KeyEvent) bool {
 	if action, ok := BufKeyBindings[e]; ok {
-		action(h)
+		if action(h) {
+			h.Win.Relocate()
+		}
 		return true
 	}
 	return false
@@ -125,7 +130,9 @@ func (h *BufHandler) DoKeyEvent(e KeyEvent) bool {
 
 func (h *BufHandler) DoMouseEvent(e MouseEvent, te *tcell.EventMouse) bool {
 	if action, ok := BufMouseBindings[e]; ok {
-		action(h, te)
+		if action(h, te) {
+			h.Win.Relocate()
+		}
 		return true
 	}
 	return false

cmd/micro/display/statusline.go

@@ -8,7 +8,6 @@ import (
 	"strconv"
 	"unicode/utf8"
 
-	"github.com/zyedidia/micro/cmd/micro/action"
 	"github.com/zyedidia/micro/cmd/micro/buffer"
 	"github.com/zyedidia/micro/cmd/micro/config"
 	"github.com/zyedidia/micro/cmd/micro/screen"
@@ -84,12 +83,13 @@ func (s *StatusLine) Display() {
 			option := name[4:]
 			return []byte(fmt.Sprint(s.FindOpt(string(option))))
 		} else if bytes.HasPrefix(name, []byte("bind")) {
-			binding := string(name[5:])
-			for k, v := range action.Bindings {
-				if v == binding {
-					return []byte(k)
-				}
-			}
+			// binding := string(name[5:])
+			// TODO: search bindings
+			// for k, v := range action.Bindings {
+			// 	if v == binding {
+			// 		return []byte(k)
+			// 	}
+			// }
 			return []byte("null")
 		} else {
 			return []byte(s.Info[string(name)](s.win.Buf))

cmd/micro/display/window.go

@@ -1,6 +1,7 @@
 package display
 
 import (
+	"log"
 	"strconv"
 	"unicode/utf8"
 
@@ -37,12 +38,15 @@ type BufWindow struct {
 	Buf *buffer.Buffer
 
 	sline *StatusLine
+
+	lineHeight []int
 }
 
 // NewBufWindow creates a new window at a location in the screen with a width and height
 func NewBufWindow(x, y, width, height int, buf *buffer.Buffer) *BufWindow {
 	w := new(BufWindow)
 	w.X, w.Y, w.Width, w.Height, w.Buf = x, y, width, height, buf
+	w.lineHeight = make([]int, height)
 
 	w.sline = NewStatusLine(w)
 
@@ -58,6 +62,71 @@ func (w *BufWindow) Clear() {
 	}
 }
 
+// Bottomline returns the line number of the lowest line in the view
+// You might think that this is obviously just v.StartLine + v.Height
+// but if softwrap is enabled things get complicated since one buffer
+// line can take up multiple lines in the view
+func (w *BufWindow) Bottomline() int {
+	// b := w.Buf
+
+	// if !b.Settings["softwrap"].(bool) {
+	// 	return w.StartLine + w.Height
+	// }
+
+	prev := 0
+	for i, l := range w.lineHeight {
+		if l >= prev {
+			log.Println("lineHeight[", i, "] = ", l)
+			prev = l
+		} else {
+			break
+		}
+	}
+	return prev
+}
+
+// Relocate moves the view window so that the cursor is in view
+// This is useful if the user has scrolled far away, and then starts typing
+// Returns true if the window location is moved
+func (w *BufWindow) Relocate() bool {
+	b := w.Buf
+	height := w.Bottomline() + 1 - w.StartLine
+	log.Println("Height: ", height)
+	ret := false
+	activeC := w.Buf.GetActiveCursor()
+	cy := activeC.Y
+	scrollmargin := int(b.Settings["scrollmargin"].(float64))
+	if cy < w.StartLine+scrollmargin && cy > scrollmargin-1 {
+		w.StartLine = cy - scrollmargin
+		ret = true
+	} else if cy < w.StartLine {
+		w.StartLine = cy
+		ret = true
+	}
+	if cy > w.StartLine+height-1-scrollmargin && cy < b.LinesNum()-scrollmargin {
+		w.StartLine = cy - height + 1 + scrollmargin
+		ret = true
+	} else if cy >= b.LinesNum()-scrollmargin && cy >= height {
+		w.StartLine = b.LinesNum() - height
+		log.Println(w.StartLine)
+		ret = true
+	}
+
+	// TODO: horizontal scroll
+	// if !b.Settings["softwrap"].(bool) {
+	// 	cx := activeC.GetVisualX()
+	// 	if cx < w.StartCol {
+	// 		w.StartCol = cx
+	// 		ret = true
+	// 	}
+	// 	if cx+v.lineNumOffset+1 > v.leftCol+v.Width {
+	// 		v.leftCol = cx - v.Width + v.lineNumOffset + 1
+	// 		ret = true
+	// 	}
+	// }
+	return ret
+}
+
 func (w *BufWindow) drawLineNum(lineNumStyle tcell.Style, softwrapped bool, maxLineNumLength int, vloc *buffer.Loc, bloc *buffer.Loc) {
 	lineNum := strconv.Itoa(bloc.Y + 1)
 
@@ -173,6 +242,8 @@ func (w *BufWindow) displayBuffer() {
 			nColsBeforeStart--
 		}
 
+		w.lineHeight[vloc.Y] = bloc.Y
+
 		totalwidth := bloc.X - nColsBeforeStart
 		for len(line) > 0 {
 			if activeC.X == bloc.X && activeC.Y == bloc.Y {
@@ -217,6 +288,7 @@ func (w *BufWindow) displayBuffer() {
 						break
 					}
 					vloc.X = 0
+					w.lineHeight[vloc.Y] = bloc.Y
 					// This will draw an empty line number because the current line is wrapped
 					w.drawLineNum(lineNumStyle, true, maxLineNumLength, &vloc, &bloc)
 				}

cmd/micro/editpane.go

@@ -13,8 +13,10 @@ type EditPane struct {
 
 func NewBufEditPane(x, y, width, height int, b *buffer.Buffer) *EditPane {
 	e := new(EditPane)
-	e.Window = display.NewBufWindow(x, y, width, height, b)
-	e.Handler = action.NewBufHandler(b)
+	// TODO: can probably replace editpane with bufhandler entirely
+	w := display.NewBufWindow(x, y, width, height, b)
+	e.Window = w
+	e.Handler = action.NewBufHandler(b, w)
 
 	return e
 }

cmd/micro/util/util.go

@@ -231,3 +231,19 @@ func EscapePath(path string) string {
 	path = filepath.ToSlash(path)
 	return strings.Replace(path, "/", "%", -1)
 }
+
+// GetLeadingWhitespace returns the leading whitespace of the given byte array
+func GetLeadingWhitespace(b []byte) []byte {
+	ws := []byte{}
+	for len(b) > 0 {
+		r, size := utf8.DecodeRune(b)
+		if r == ' ' || r == '\t' {
+			ws = append(ws, byte(r))
+		} else {
+			break
+		}
+
+		b = b[size:]
+	}
+	return ws
+}