package main
import (
- "io/ioutil"
"reflect"
"runtime"
"strconv"
"strings"
"time"
+ "github.com/mattn/go-runewidth"
"github.com/zyedidia/tcell"
)
// It stores information about the cursor, and the viewport
// that the user sees the buffer from.
type View struct {
- Cursor Cursor
+ // A pointer to the buffer's cursor for ease of access
+ Cursor *Cursor
// The topmost line, used for vertical scrolling
Topline int
width int
height int
+ // Where this view is located
+ x, y int
+
// How much to offset because of line numbers
lineNumOffset int
- // The eventhandler for undo/redo
- eh *EventHandler
-
// Holds the list of gutter messages
messages map[string][]GutterMessage
+ // Is the help text opened in this view
+ helpOpen bool
+
+ // This is the index of this view in the views array
+ Num int
+ // What tab is this view stored in
+ TabNum int
+
+ // Is this view modifiable?
+ Modifiable bool
+
// The buffer
Buf *Buffer
+ // This is the buffer that was last opened
+ // This is used to open help, and then go back to the previously opened buffer
+ lastBuffer *Buffer
// The statusline
sline Statusline
func NewViewWidthHeight(buf *Buffer, w, h int) *View {
v := new(View)
+ v.x, v.y = 0, 0
+
v.widthPercent = w
v.heightPercent = h
v.Resize(screen.Size())
v.OpenBuffer(buf)
- v.eh = NewEventHandler(v)
-
v.messages = make(map[string][]GutterMessage)
v.sline = Statusline{
func (v *View) Resize(w, h int) {
// Always include 1 line for the command line at the bottom
h--
+ if len(tabs) > 1 {
+ // Include one line for the tab bar at the top
+ h--
+ v.y = 1
+ }
v.width = int(float32(w) * float32(v.widthPercent) / 100)
// We subtract 1 for the statusline
- v.height = int(float32(h)*float32(v.heightPercent)/100) - 1
+ v.height = int(float32(h) * float32(v.heightPercent) / 100)
+ if settings["statusline"].(bool) {
+ // Make room for the status line if it is enabled
+ v.height--
+ }
}
// ScrollUp scrolls the view up n lines (if possible)
// causing them to lose the unsaved changes
// The message is what to print after saying "You have unsaved changes. "
func (v *View) CanClose(msg string) bool {
- if v.Buf.IsDirty() {
- quit, canceled := messenger.Prompt("You have unsaved changes. " + msg)
+ if v.Buf.IsModified {
+ quit, canceled := messenger.Prompt("You have unsaved changes. "+msg, "Unsaved")
if !canceled {
if strings.ToLower(quit) == "yes" || strings.ToLower(quit) == "y" {
return true
// OpenBuffer opens a new buffer in this view.
// This resets the topline, event handler and cursor.
func (v *View) OpenBuffer(buf *Buffer) {
+ screen.Clear()
+ v.CloseBuffer()
v.Buf = buf
+ v.Cursor = &buf.Cursor
v.Topline = 0
v.leftCol = 0
- // Put the cursor at the first spot
- v.Cursor = Cursor{
- x: 0,
- y: 0,
- v: v,
- }
v.Cursor.ResetSelection()
+ v.Relocate()
v.messages = make(map[string][]GutterMessage)
- v.eh = NewEventHandler(v)
v.matches = Match(v)
// Set mouseReleased to true because we assume the mouse is not being pressed when
v.lastClickTime = time.Time{}
}
+// CloseBuffer performs any closing functions on the buffer
+func (v *View) CloseBuffer() {
+ if v.Buf != nil {
+ v.Buf.Serialize()
+ }
+}
+
// ReOpen reloads the current buffer
func (v *View) ReOpen() {
if v.CanClose("Continue? (yes, no, save) ") {
- file, err := ioutil.ReadFile(v.Buf.Path)
- filename := v.Buf.Name
-
- if err != nil {
- messenger.Error(err.Error())
- return
- }
- buf := NewBuffer(string(file), filename)
- v.Buf = buf
- v.matches = Match(v)
- v.Cursor.Relocate()
+ screen.Clear()
+ v.Buf.ReOpen()
v.Relocate()
+ v.matches = Match(v)
}
}
// This is useful if the user has scrolled far away, and then starts typing
func (v *View) Relocate() bool {
ret := false
- cy := v.Cursor.y
- if cy < v.Topline {
+ cy := v.Cursor.Y
+ scrollmargin := int(settings["scrollmargin"].(float64))
+ if cy < v.Topline+scrollmargin && cy > scrollmargin-1 {
+ v.Topline = cy - scrollmargin
+ ret = true
+ } else if cy < v.Topline {
v.Topline = cy
ret = true
}
- if cy > v.Topline+v.height-1 {
- v.Topline = cy - v.height + 1
+ if cy > v.Topline+v.height-1-scrollmargin && cy < v.Buf.NumLines-scrollmargin {
+ v.Topline = cy - v.height + 1 + scrollmargin
+ ret = true
+ } else if cy >= v.Buf.NumLines-scrollmargin && cy > v.height {
+ v.Topline = v.Buf.NumLines - v.height
ret = true
}
}
x = v.Cursor.GetCharPosInLine(y, x)
- if x > Count(v.Buf.Lines[y]) {
- x = Count(v.Buf.Lines[y])
+ if x > Count(v.Buf.Line(y)) {
+ x = Count(v.Buf.Line(y))
}
- v.Cursor.x = x
- v.Cursor.y = y
- v.Cursor.lastVisualX = v.Cursor.GetVisualX()
+ v.Cursor.X = x
+ v.Cursor.Y = y
+ v.Cursor.LastVisualX = v.Cursor.GetVisualX()
}
// HandleEvent handles an event passed by the main loop
// By default it's true because most events should cause a relocate
relocate := true
+ v.Buf.CheckModTime()
+
switch e := event.(type) {
case *tcell.EventResize:
// Window resized
v.Resize(e.Size())
case *tcell.EventKey:
- if e.Key() == tcell.KeyRune {
+ if e.Key() == tcell.KeyRune && e.Modifiers() == 0 {
// Insert a character
if v.Cursor.HasSelection() {
v.Cursor.DeleteSelection()
v.Cursor.ResetSelection()
}
- v.eh.Insert(v.Cursor.Loc(), string(e.Rune()))
+ v.Buf.Insert(v.Cursor.Loc, string(e.Rune()))
v.Cursor.Right()
} else {
- for key, action := range bindings {
- if e.Key() == key {
- relocate = action(v)
- for _, pl := range loadedPlugins {
- funcName := strings.Split(runtime.FuncForPC(reflect.ValueOf(action).Pointer()).Name(), ".")
- err := Call(pl + "_on" + funcName[len(funcName)-1])
- if err != nil {
- TermMessage(err)
+ for key, actions := range bindings {
+ if e.Key() == key.keyCode {
+ if e.Key() == tcell.KeyRune {
+ if e.Rune() != key.r {
+ continue
+ }
+ }
+ if e.Modifiers() == key.modifiers {
+ relocate = false
+ for _, action := range actions {
+ relocate = action(v) || relocate
+ for _, pl := range loadedPlugins {
+ funcName := strings.Split(runtime.FuncForPC(reflect.ValueOf(action).Pointer()).Name(), ".")
+ err := Call(pl+"_on"+funcName[len(funcName)-1], nil)
+ if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
+ TermMessage(err)
+ }
+ }
}
}
}
v.Cursor.ResetSelection()
}
clip := e.Text()
- v.eh.Insert(v.Cursor.Loc(), clip)
- v.Cursor.SetLoc(v.Cursor.Loc() + Count(clip))
+ v.Buf.Insert(v.Cursor.Loc, clip)
+ v.Cursor.Loc = v.Cursor.Loc.Move(Count(clip), v.Buf)
v.freshClip = false
case *tcell.EventMouse:
x, y := e.Position()
x -= v.lineNumOffset - v.leftCol
y += v.Topline
+ // Don't relocate for mouse events
+ relocate = false
button := e.Buttons()
switch button {
case tcell.Button1:
// Left click
- if v.mouseReleased && !e.HasMotion() {
+ if v.mouseReleased {
v.MoveToMouseClick(x, y)
if time.Since(v.lastClickTime)/time.Millisecond < doubleClickThreshold {
if v.doubleClick {
v.tripleClick = false
v.lastClickTime = time.Now()
- loc := v.Cursor.Loc()
- v.Cursor.origSelection[0] = loc
- v.Cursor.curSelection[0] = loc
- v.Cursor.curSelection[1] = loc
+ v.Cursor.OrigSelection[0] = v.Cursor.Loc
+ v.Cursor.CurSelection[0] = v.Cursor.Loc
+ v.Cursor.CurSelection[1] = v.Cursor.Loc
}
v.mouseReleased = false
} else if !v.mouseReleased {
} else if v.doubleClick {
v.Cursor.AddWordToSelection()
} else {
- v.Cursor.curSelection[1] = v.Cursor.Loc()
+ v.Cursor.CurSelection[1] = v.Cursor.Loc
}
}
case tcell.ButtonNone:
if !v.doubleClick && !v.tripleClick {
v.MoveToMouseClick(x, y)
- v.Cursor.curSelection[1] = v.Cursor.Loc()
+ v.Cursor.CurSelection[1] = v.Cursor.Loc
}
v.mouseReleased = true
}
- // We don't want to relocate because otherwise the view will be relocated
- // every time the user moves the cursor
- relocate = false
case tcell.WheelUp:
- // Scroll up two lines
- v.ScrollUp(2)
- // We don't want to relocate if the user is scrolling
- relocate = false
+ // Scroll up
+ scrollspeed := int(settings["scrollspeed"].(float64))
+ v.ScrollUp(scrollspeed)
case tcell.WheelDown:
- // Scroll down two lines
- v.ScrollDown(2)
- // We don't want to relocate if the user is scrolling
- relocate = false
+ // Scroll down
+ scrollspeed := int(settings["scrollspeed"].(float64))
+ v.ScrollDown(scrollspeed)
}
}
v.messages[section] = []GutterMessage{}
}
+// ClearAllGutterMessages clears all the gutter messages
+func (v *View) ClearAllGutterMessages() {
+ for k := range v.messages {
+ v.messages[k] = []GutterMessage{}
+ }
+}
+
// DisplayView renders the view to the screen
func (v *View) DisplayView() {
// The character number of the character in the top left of the screen
- charNum := ToCharPos(0, v.Topline, v.Buf)
+ charNum := Loc{0, v.Topline}
// Convert the length of buffer to a string, and get the length of the string
// We are going to have to offset by that amount
}
for lineN := 0; lineN < v.height; lineN++ {
- var x int
+ x := v.x
// If the buffer is smaller than the view height
- // and we went too far, break
if lineN+v.Topline >= v.Buf.NumLines {
- break
+ // We have to clear all this space
+ for i := 0; i < v.width; i++ {
+ screen.SetContent(i, lineN+v.y, ' ', nil, defStyle)
+ }
+
+ continue
}
- line := v.Buf.Lines[lineN+v.Topline]
+ line := v.Buf.Line(lineN + v.Topline)
if hasGutterMessages {
msgOnLine := false
gutterStyle = style
}
}
- screen.SetContent(x, lineN, '>', nil, gutterStyle)
+ screen.SetContent(x, lineN+v.y, '>', nil, gutterStyle)
x++
- screen.SetContent(x, lineN, '>', nil, gutterStyle)
+ screen.SetContent(x, lineN+v.y, '>', nil, gutterStyle)
x++
- if v.Cursor.y == lineN+v.Topline {
+ if v.Cursor.Y == lineN+v.Topline {
messenger.Message(msg.msg)
messenger.gutterMessage = true
}
}
}
if !msgOnLine {
- screen.SetContent(x, lineN, ' ', nil, tcell.StyleDefault)
+ screen.SetContent(x, lineN+v.y, ' ', nil, tcell.StyleDefault)
x++
- screen.SetContent(x, lineN, ' ', nil, tcell.StyleDefault)
+ screen.SetContent(x, lineN+v.y, ' ', nil, tcell.StyleDefault)
x++
- if v.Cursor.y == lineN+v.Topline && messenger.gutterMessage {
+ if v.Cursor.Y == lineN+v.Topline && messenger.gutterMessage {
messenger.Reset()
messenger.gutterMessage = false
}
if settings["ruler"] == true {
lineNum = strconv.Itoa(lineN + v.Topline + 1)
for i := 0; i < maxLineLength-len(lineNum); i++ {
- screen.SetContent(x, lineN, ' ', nil, lineNumStyle)
+ screen.SetContent(x, lineN+v.y, ' ', nil, lineNumStyle)
x++
}
// Write the actual line number
for _, ch := range lineNum {
- screen.SetContent(x, lineN, ch, nil, lineNumStyle)
+ screen.SetContent(x, lineN+v.y, ch, nil, lineNumStyle)
x++
}
if settings["ruler"] == true {
// Write the extra space
- screen.SetContent(x, lineN, ' ', nil, lineNumStyle)
+ screen.SetContent(x, lineN+v.y, ' ', nil, lineNumStyle)
x++
}
}
// Write the line
- tabchars := 0
for colN, ch := range line {
var lineStyle tcell.Style
}
if v.Cursor.HasSelection() &&
- (charNum >= v.Cursor.curSelection[0] && charNum < v.Cursor.curSelection[1] ||
- charNum < v.Cursor.curSelection[0] && charNum >= v.Cursor.curSelection[1]) {
+ (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
+ charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
lineStyle = tcell.StyleDefault.Reverse(true)
lineStyle = highlightStyle
}
+ if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
+ if style, ok := colorscheme["cursor-line"]; ok {
+ fg, _, _ := style.Decompose()
+ lineStyle = lineStyle.Background(fg)
+ }
+ }
+
if ch == '\t' {
- screen.SetContent(x+tabchars, lineN, ' ', nil, lineStyle)
+ lineIndentStyle := defStyle
+ if style, ok := colorscheme["indent-char"]; ok {
+ lineIndentStyle = style
+ }
+ if v.Cursor.HasSelection() &&
+ (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
+ charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
+
+ lineIndentStyle = tcell.StyleDefault.Reverse(true)
+
+ if style, ok := colorscheme["selection"]; ok {
+ lineIndentStyle = style
+ }
+ }
+ if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
+ if style, ok := colorscheme["cursor-line"]; ok {
+ fg, _, _ := style.Decompose()
+ lineIndentStyle = lineIndentStyle.Background(fg)
+ }
+ }
+ indentChar := []rune(settings["indentchar"].(string))
+ if x-v.leftCol >= v.lineNumOffset {
+ screen.SetContent(x-v.leftCol, lineN+v.y, indentChar[0], nil, lineIndentStyle)
+ }
tabSize := int(settings["tabsize"].(float64))
for i := 0; i < tabSize-1; i++ {
- tabchars++
- if x-v.leftCol+tabchars >= v.lineNumOffset {
- screen.SetContent(x-v.leftCol+tabchars, lineN, ' ', nil, lineStyle)
+ x++
+ if x-v.leftCol >= v.lineNumOffset {
+ screen.SetContent(x-v.leftCol, lineN+v.y, ' ', nil, lineStyle)
+ }
+ }
+ } else if runewidth.RuneWidth(ch) > 1 {
+ if x-v.leftCol >= v.lineNumOffset {
+ screen.SetContent(x-v.leftCol, lineN, ch, nil, lineStyle)
+ }
+ for i := 0; i < runewidth.RuneWidth(ch)-1; i++ {
+ x++
+ if x-v.leftCol >= v.lineNumOffset {
+ screen.SetContent(x-v.leftCol, lineN, ' ', nil, lineStyle)
}
}
} else {
- if x-v.leftCol+tabchars >= v.lineNumOffset {
- screen.SetContent(x-v.leftCol+tabchars, lineN, ch, nil, lineStyle)
+ if x-v.leftCol >= v.lineNumOffset {
+ screen.SetContent(x-v.leftCol, lineN+v.y, ch, nil, lineStyle)
}
}
- charNum++
+ charNum = charNum.Move(1, v.Buf)
x++
}
// Here we are at a newline
// The newline may be selected, in which case we should draw the selection style
// with a space to represent it
if v.Cursor.HasSelection() &&
- (charNum >= v.Cursor.curSelection[0] && charNum < v.Cursor.curSelection[1] ||
- charNum < v.Cursor.curSelection[0] && charNum >= v.Cursor.curSelection[1]) {
+ (charNum.GreaterEqual(v.Cursor.CurSelection[0]) && charNum.LessThan(v.Cursor.CurSelection[1]) ||
+ charNum.LessThan(v.Cursor.CurSelection[0]) && charNum.GreaterEqual(v.Cursor.CurSelection[1])) {
selectStyle := defStyle.Reverse(true)
if style, ok := colorscheme["selection"]; ok {
selectStyle = style
}
- screen.SetContent(x-v.leftCol+tabchars, lineN, ' ', nil, selectStyle)
+ screen.SetContent(x-v.leftCol, lineN+v.y, ' ', nil, selectStyle)
+ x++
}
- charNum++
+ charNum = charNum.Move(1, v.Buf)
+
+ for i := 0; i < v.width-(x-v.leftCol); i++ {
+ lineStyle := tcell.StyleDefault
+ if settings["cursorline"].(bool) && !v.Cursor.HasSelection() && v.Cursor.Y == lineN+v.Topline {
+ if style, ok := colorscheme["cursor-line"]; ok {
+ fg, _, _ := style.Decompose()
+ lineStyle = lineStyle.Background(fg)
+ }
+ }
+ if !(x-v.leftCol < v.lineNumOffset) {
+ screen.SetContent(x+i, lineN+v.y, ' ', nil, lineStyle)
+ }
+ }
+ }
+}
+
+// DisplayCursor draws the current buffer's cursor to the screen
+func (v *View) DisplayCursor() {
+ // Don't draw the cursor if it is out of the viewport or if it has a selection
+ if (v.Cursor.Y-v.Topline < 0 || v.Cursor.Y-v.Topline > v.height-1) || v.Cursor.HasSelection() {
+ screen.HideCursor()
+ } else {
+ screen.ShowCursor(v.x+v.Cursor.GetVisualX()+v.lineNumOffset-v.leftCol, v.Cursor.Y-v.Topline+v.y)
}
}
// Display renders the view, the cursor, and statusline
func (v *View) Display() {
v.DisplayView()
- v.Cursor.Display()
- v.sline.Display()
+ v.DisplayCursor()
+ if settings["statusline"].(bool) {
+ v.sline.Display()
+ }
}
projects / micro.git / blobdiff