package main
-// FromCharPos converts from a character position to an x, y position
-func FromCharPos(loc int, buf *Buffer) (int, int) {
- return FromCharPosStart(0, 0, 0, loc, buf)
-}
-
-// FromCharPosStart converts from a character position to an x, y position, starting at the specified character location
-func FromCharPosStart(startLoc, startX, startY, loc int, buf *Buffer) (int, int) {
- charNum := startLoc
- x, y := startX, startY
-
- lineLen := Count(buf.Lines[y]) + 1
- for charNum+lineLen <= loc {
- charNum += lineLen
- y++
- if y >= buf.NumLines {
- return 0, 0
- }
- lineLen = Count(buf.Lines[y]) + 1
- }
- x = loc - charNum
-
- return x, y
-}
-
-// ToCharPos converts from an x, y position to a character position
-func ToCharPos(x, y int, buf *Buffer) int {
- loc := 0
- for i := 0; i < y; i++ {
- // + 1 for the newline
- loc += Count(buf.Lines[i]) + 1
- }
- loc += x
- return loc
-}
+import "github.com/zyedidia/clipboard"
// The Cursor struct stores the location of the cursor in the view
// The complicated part about the cursor is storing its location.
// selection.
type Cursor struct {
buf *Buffer
-
- // The cursor display location
- X int
- Y int
+ Loc
// Last cursor x position
LastVisualX int
// The current selection as a range of character numbers (inclusive)
- CurSelection [2]int
+ CurSelection [2]Loc
// The original selection as a range of character numbers
// This is used for line and word selection where it is necessary
// to know what the original selection was
- OrigSelection [2]int
+ OrigSelection [2]Loc
}
// Goto puts the cursor at the given cursor's location and gives the current cursor its selection too
c.OrigSelection, c.CurSelection = b.OrigSelection, b.CurSelection
}
-// SetLoc sets the location of the cursor in terms of character number
-// and not x, y location
-// It's just a simple wrapper of FromCharPos
-func (c *Cursor) SetLoc(loc int) {
- c.X, c.Y = FromCharPos(loc, c.buf)
- c.LastVisualX = c.GetVisualX()
+// ResetSelection resets the user's selection
+func (c *Cursor) ResetSelection() {
+ c.SetSelectionStart(c.buf.Start())
+ c.SetSelectionEnd(c.buf.Start())
}
-// Loc gets the cursor location in terms of character number instead
-// of x, y location
-// It's just a simple wrapper of ToCharPos
-func (c *Cursor) Loc() int {
- return ToCharPos(c.X, c.Y, c.buf)
+// SetSelectionStart sets the start of the selection
+func (c *Cursor) SetSelectionStart(pos Loc) {
+ c.SetSelectionStart(pos)
+ // Copy to primary clipboard for linux
+ clipboard.WriteAll(c.GetSelection(), "primary")
}
-// ResetSelection resets the user's selection
-func (c *Cursor) ResetSelection() {
- c.CurSelection[0] = 0
- c.CurSelection[1] = 0
+// SetSelectionEnd sets the end of the selection
+func (c *Cursor) SetSelectionEnd(pos Loc) {
+ c.SetSelectionEnd(pos)
+ // Copy to primary clipboard for linux
+ clipboard.WriteAll(c.GetSelection(), "primary")
}
// HasSelection returns whether or not the user has selected anything
// DeleteSelection deletes the currently selected text
func (c *Cursor) DeleteSelection() {
- if c.CurSelection[0] > c.CurSelection[1] {
+ if c.CurSelection[0].GreaterThan(c.CurSelection[1]) {
c.buf.Remove(c.CurSelection[1], c.CurSelection[0])
- c.SetLoc(c.CurSelection[1])
+ c.Loc = c.CurSelection[1]
} else if c.GetSelection() == "" {
return
} else {
c.buf.Remove(c.CurSelection[0], c.CurSelection[1])
- c.SetLoc(c.CurSelection[0])
+ c.Loc = c.CurSelection[0]
}
}
// GetSelection returns the cursor's selection
func (c *Cursor) GetSelection() string {
- if c.CurSelection[0] > c.CurSelection[1] {
+ if c.CurSelection[0].GreaterThan(c.CurSelection[1]) {
return c.buf.Substr(c.CurSelection[1], c.CurSelection[0])
}
return c.buf.Substr(c.CurSelection[0], c.CurSelection[1])
// SelectLine selects the current line
func (c *Cursor) SelectLine() {
c.Start()
- c.CurSelection[0] = c.Loc()
+ c.SetSelectionStart(c.Loc)
c.End()
if c.buf.NumLines-1 > c.Y {
- c.CurSelection[1] = c.Loc() + 1
+ c.SetSelectionEnd(c.Loc.Move(1, c.buf))
} else {
- c.CurSelection[1] = c.Loc()
+ c.SetSelectionEnd(c.Loc)
}
c.OrigSelection = c.CurSelection
// AddLineToSelection adds the current line to the selection
func (c *Cursor) AddLineToSelection() {
- loc := c.Loc()
-
- if loc < c.OrigSelection[0] {
+ if c.Loc.LessThan(c.OrigSelection[0]) {
c.Start()
- c.CurSelection[0] = c.Loc()
- c.CurSelection[1] = c.OrigSelection[1]
+ c.SetSelectionStart(c.Loc)
+ c.SetSelectionEnd(c.OrigSelection[1])
}
- if loc > c.OrigSelection[1] {
+ if c.Loc.GreaterThan(c.OrigSelection[1]) {
c.End()
- c.CurSelection[1] = c.Loc() + 1
- c.CurSelection[0] = c.OrigSelection[0]
+ c.SetSelectionEnd(c.Loc.Move(1, c.buf))
+ c.SetSelectionStart(c.OrigSelection[0])
}
- if loc < c.OrigSelection[1] && loc > c.OrigSelection[0] {
+ if c.Loc.LessThan(c.OrigSelection[1]) && c.Loc.GreaterThan(c.OrigSelection[0]) {
c.CurSelection = c.OrigSelection
}
}
// SelectWord selects the word the cursor is currently on
func (c *Cursor) SelectWord() {
- if len(c.buf.Lines[c.Y]) == 0 {
+ if len(c.buf.Line(c.Y)) == 0 {
return
}
if !IsWordChar(string(c.RuneUnder(c.X))) {
- loc := c.Loc()
- c.CurSelection[0] = loc
- c.CurSelection[1] = loc + 1
+ c.SetSelectionStart(c.Loc)
+ c.SetSelectionEnd(c.Loc.Move(1, c.buf))
c.OrigSelection = c.CurSelection
return
}
backward--
}
- c.CurSelection[0] = ToCharPos(backward, c.Y, c.buf)
+ c.SetSelectionStart(Loc{backward, c.Y})
c.OrigSelection[0] = c.CurSelection[0]
- for forward < Count(c.buf.Lines[c.Y])-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
+ for forward < Count(c.buf.Line(c.Y))-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
forward++
}
- c.CurSelection[1] = ToCharPos(forward, c.Y, c.buf) + 1
+ c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
c.OrigSelection[1] = c.CurSelection[1]
- c.SetLoc(c.CurSelection[1])
+ c.Loc = c.CurSelection[1]
}
// AddWordToSelection adds the word the cursor is currently on to the selection
func (c *Cursor) AddWordToSelection() {
- loc := c.Loc()
-
- if loc > c.OrigSelection[0] && loc < c.OrigSelection[1] {
+ if c.Loc.GreaterThan(c.OrigSelection[0]) && c.Loc.LessThan(c.OrigSelection[1]) {
c.CurSelection = c.OrigSelection
return
}
- if loc < c.OrigSelection[0] {
+ if c.Loc.LessThan(c.OrigSelection[0]) {
backward := c.X
for backward > 0 && IsWordChar(string(c.RuneUnder(backward-1))) {
backward--
}
- c.CurSelection[0] = ToCharPos(backward, c.Y, c.buf)
- c.CurSelection[1] = c.OrigSelection[1]
+ c.SetSelectionStart(Loc{backward, c.Y})
+ c.SetSelectionEnd(c.OrigSelection[1])
}
- if loc > c.OrigSelection[1] {
+ if c.Loc.GreaterThan(c.OrigSelection[1]) {
forward := c.X
- for forward < Count(c.buf.Lines[c.Y])-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
+ for forward < Count(c.buf.Line(c.Y))-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
forward++
}
- c.CurSelection[1] = ToCharPos(forward, c.Y, c.buf) + 1
- c.CurSelection[0] = c.OrigSelection[0]
+ c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
+ c.SetSelectionStart(c.OrigSelection[0])
}
- c.SetLoc(c.CurSelection[1])
+ c.Loc = c.CurSelection[1]
}
// SelectTo selects from the current cursor location to the given location
-func (c *Cursor) SelectTo(loc int) {
- if loc > c.OrigSelection[0] {
- c.CurSelection[0] = c.OrigSelection[0]
- c.CurSelection[1] = loc
+func (c *Cursor) SelectTo(loc Loc) {
+ if loc.GreaterThan(c.OrigSelection[0]) {
+ c.SetSelectionStart(c.OrigSelection[0])
+ c.SetSelectionEnd(loc)
} else {
- c.CurSelection[0] = loc
- c.CurSelection[1] = c.OrigSelection[0]
+ c.SetSelectionStart(loc)
+ c.SetSelectionEnd(c.OrigSelection[0])
}
}
// WordRight moves the cursor one word to the right
func (c *Cursor) WordRight() {
- c.Right()
for IsWhitespace(c.RuneUnder(c.X)) {
- if c.X == Count(c.buf.Lines[c.Y]) {
+ if c.X == Count(c.buf.Line(c.Y)) {
+ c.Right()
return
}
c.Right()
}
- for !IsWhitespace(c.RuneUnder(c.X)) {
- if c.X == Count(c.buf.Lines[c.Y]) {
+ c.Right()
+ for IsWordChar(string(c.RuneUnder(c.X))) {
+ if c.X == Count(c.buf.Line(c.Y)) {
return
}
c.Right()
}
c.Left()
}
- for !IsWhitespace(c.RuneUnder(c.X)) {
+ c.Left()
+ for IsWordChar(string(c.RuneUnder(c.X))) {
if c.X == 0 {
return
}
// RuneUnder returns the rune under the given x position
func (c *Cursor) RuneUnder(x int) rune {
- line := []rune(c.buf.Lines[c.Y])
+ line := []rune(c.buf.Line(c.Y))
if len(line) == 0 {
return '\n'
}
}
c.Y = proposedY
- runes := []rune(c.buf.Lines[c.Y])
+ runes := []rune(c.buf.Line(c.Y))
c.X = c.GetCharPosInLine(c.Y, c.LastVisualX)
if c.X > len(runes) {
c.X = len(runes)
// Left moves the cursor left one cell (if possible) or to the last line if it is at the beginning
func (c *Cursor) Left() {
- if c.Loc() == 0 {
+ if c.Loc == c.buf.Start() {
return
}
if c.X > 0 {
// Right moves the cursor right one cell (if possible) or to the next line if it is at the end
func (c *Cursor) Right() {
- if c.Loc() == c.buf.Len() {
+ if c.Loc == c.buf.End() {
return
}
- // TermMessage(Count(c.buf.Lines[c.Y]))
- if c.X < Count(c.buf.Lines[c.Y]) {
+ if c.X < Count(c.buf.Line(c.Y)) {
c.X++
} else {
c.Down()
// End moves the cursor to the end of the line it is on
func (c *Cursor) End() {
- c.X = Count(c.buf.Lines[c.Y])
+ c.X = Count(c.buf.Line(c.Y))
c.LastVisualX = c.GetVisualX()
}
// GetCharPosInLine gets the char position of a visual x y coordinate (this is necessary because tabs are 1 char but 4 visual spaces)
func (c *Cursor) GetCharPosInLine(lineNum, visualPos int) int {
// Get the tab size
- tabSize := int(settings["tabsize"].(float64))
- // This is the visual line -- every \t replaced with the correct number of spaces
- visualLineLen := StringWidth(c.buf.Lines[lineNum])
+ tabSize := int(c.buf.Settings["tabsize"].(float64))
+ visualLineLen := StringWidth(c.buf.Line(lineNum), tabSize)
if visualPos > visualLineLen {
visualPos = visualLineLen
}
- width := WidthOfLargeRunes(c.buf.Lines[lineNum])
+ width := WidthOfLargeRunes(c.buf.Line(lineNum), tabSize)
if visualPos >= width {
return visualPos - width
}
// GetVisualX returns the x value of the cursor in visual spaces
func (c *Cursor) GetVisualX() int {
- runes := []rune(c.buf.Lines[c.Y])
- return StringWidth(string(runes[:c.X]))
+ runes := []rune(c.buf.Line(c.Y))
+ tabSize := int(c.buf.Settings["tabsize"].(float64))
+ return StringWidth(string(runes[:c.X]), tabSize)
}
// Relocate makes sure that the cursor is inside the bounds of the buffer
if c.X < 0 {
c.X = 0
- } else if c.X > Count(c.buf.Lines[c.Y]) {
- c.X = Count(c.buf.Lines[c.Y])
+ } else if c.X > Count(c.buf.Line(c.Y)) {
+ c.X = Count(c.buf.Line(c.Y))
}
}
projects / micro.git / blobdiff