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window.go
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window.go
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package main
import (
glisp "github.com/glycerine/zygomys/zygo"
termbox "github.com/nsf/termbox-go"
)
type winTree struct {
split bool
hor bool
focused bool
buf *EditorBuffer
childLT *winTree
childRB *winTree
Parent *winTree
}
func getFocusWindow() *winTree {
return getWindowWithProps(func(t *winTree) bool { return t.focused },
Global.WindowTree)
}
func getWindowWithProps(f func(*winTree) bool, t *winTree) *winTree {
if !t.split {
if f(t) {
return t
}
return nil
}
ret := getWindowWithProps(f, t.childLT)
if ret == nil {
return getWindowWithProps(f, t.childRB)
}
return ret
}
func (t *winTree) mapTree(f func(*winTree)) {
if t.split {
t.childLT.mapTree(f)
t.childRB.mapTree(f)
} else {
f(t)
}
}
func vSplit() {
win := getFocusWindow()
win.focused = false
win.split = true
win.hor = false
win.childLT = &winTree{false, false, true, win.buf, nil, nil, win}
win.childRB = &winTree{false, false, false, win.buf, nil, nil, win}
win.buf = nil
}
func hSplit() {
win := getFocusWindow()
win.focused = false
win.split = true
win.hor = true
win.childLT = &winTree{false, false, true, win.buf, nil, nil, win}
win.childRB = &winTree{false, false, false, win.buf, nil, nil, win}
win.buf = nil
}
func closeOtherWindows() {
win := getFocusWindow()
Global.WindowTree = win
Global.WindowTree.Parent = nil
}
func closeThisWindow() {
win := getFocusWindow()
if win == Global.WindowTree {
Global.Input = "Can't delete the only window!"
return
}
parent := win.Parent
if parent.childLT == win {
parent.buf = parent.childRB.buf
} else {
parent.buf = parent.childLT.buf
}
parent.childLT = nil
parent.childRB = nil
parent.split = false
parent.focused = true
}
func switchWindow() {
win := getFocusWindow()
if win == Global.WindowTree {
Global.Input = "Only window"
return
}
win.focused = false
parent := win.Parent
cwin := win
for parent != nil {
if parent.childLT == cwin {
parent.childRB.setFocus()
return
}
cwin = parent
parent = cwin.Parent
}
Global.WindowTree.setFocus()
}
func switchWindowOrientation() {
win := getFocusWindow()
if win == Global.WindowTree {
Global.Input = "Only window"
return
}
parent := win.Parent
parent.hor = !parent.hor
}
func swapWindows() {
win := getFocusWindow()
if win == Global.WindowTree {
Global.Input = "Only window"
return
}
parent := win.Parent
bak := parent.childLT
parent.childLT = parent.childRB
parent.childRB = bak
}
func (t *winTree) setFocus() {
if t.split {
t.childLT.setFocus()
} else {
t.focused = true
Global.CurrentB = t.buf
}
}
func (t *winTree) draw(x, y, wx, wy int) {
if t.split {
if t.hor {
t.childLT.draw(x, y, wx/2, wy)
for i := 0; i < wy; i++ {
termbox.SetCell(
x+(wx/2), y+i, '│',
termbox.ColorDefault,
termbox.ColorDefault)
}
termbox.SetCell(x+wx/2, y+wy, ' ',
termbox.ColorDefault|termbox.AttrReverse,
termbox.ColorDefault)
t.childRB.draw(x+(wx/2)+1, y, (wx / 2), wy)
} else {
t.childLT.draw(x, y, wx, wy/2)
t.childRB.draw(x, y+1+(wy/2), wx, (wy/2)-1)
}
return
}
gutter := 0
if t.buf.hasMode("line-number-mode") && t.buf.NumRows > 0 {
gutter = GetGutterWidth(t.buf.NumRows)
}
editorDrawStatusLine(x, y+wy, wx, t)
editorScroll(wx-gutter, wy)
if t.buf.regionActive {
t.buf.recalcRegion()
}
if t.focused {
Global.CurrentBHeight = wy
editorDrawRowsFocused(x, y, x+wx, y+wy, t.buf, gutter)
} else {
editorDrawRows(x, y, x+wx, y+wy, t.buf, gutter)
}
}
func editorWriteFile(env *glisp.Zlisp) {
fn := tabCompletedEditorPrompt("Write File", tabCompleteFilename)
if fn == "" {
return
}
Global.CurrentB.Filename = fn
Global.CurrentB.UpdateRenderName()
EditorSave(env)
}
func editorVisitFile(env *glisp.Zlisp) {
fn := tabCompletedEditorPrompt("Visit File", tabCompleteFilename)
if fn == "" {
return
}
oldcb := Global.CurrentB
openFile(fn, env)
Global.WindowTree.mapTree(func(t *winTree) {
if t.buf == oldcb {
t.buf = Global.CurrentB
}
})
for i, buf := range Global.Buffers {
if buf == oldcb {
killGivenBuffer(i)
return
}
}
}
func editorFindFile(env *glisp.Zlisp) {
fn := tabCompletedEditorPrompt("Find File", tabCompleteFilename)
if fn == "" {
return
}
openFile(fn, env)
}
func openFile(fn string, env *glisp.Zlisp) {
buffer := &EditorBuffer{}
Global.Buffers = append(Global.Buffers, buffer)
win := getFocusWindow()
if win == nil {
Global.WindowTree = &winTree{}
Global.WindowTree.focused = true
Global.WindowTree.buf = buffer
} else {
win.buf = buffer
}
Global.CurrentB = buffer
ferr := EditorOpen(fn, env)
if ferr != nil {
Global.Input = ferr.Error()
AddErrorMessage(ferr.Error())
Global.CurrentB.Rows = make([]*EditorRow, 1)
Global.CurrentB.Rows[0] = &EditorRow{Global.CurrentB.NumRows,
0, "", 0, "", nil, nil, 0}
}
}
func (e *EditorBuffer) getFilename() string {
if e.Filename == "" {
return "*unnamed buffer*"
}
return e.Filename
}
func (e *EditorBuffer) getRenderName() string {
if e.Filename == "" {
return "*unnamed buffer*"
}
return e.Rendername
}
func bufferChoiceList() ([]string, int) {
choices := []string{}
def := 0
for i, buf := range Global.Buffers {
if buf == Global.CurrentB {
def = i
}
d := ""
if buf.Dirty {
d = "[M] "
}
choices = append(choices, d+buf.getFilename())
}
return choices, def
}
func editorSwitchBuffer() {
choices, def := bufferChoiceList()
in := editorChoiceIndex("Switch buffer", append([]string{"View Messages"}, choices...), def+1)
if in == 0 {
showMessages(Global.messages...)
} else {
win := getFocusWindow()
win.buf = Global.Buffers[in-1]
Global.CurrentB = Global.Buffers[in-1]
}
}
func killGivenBuffer(i int) {
// Deleting the last buffer will result in painful death!
if len(Global.Buffers) == 1 {
Global.Input = "Can't kill the last buffer!"
return
}
if i <= -1 || i >= len(Global.Buffers) {
Global.Input = "Cancel."
return
}
kb := Global.Buffers[i]
// Prompt the user if buffer modified
if kb.Dirty {
c, _ := editorYesNoPrompt("Buffer has unsaved changes; kill anyway?", false)
if !c {
return
}
}
// Find a replacement buffer.
// If the killed buffer is selected, select replacement.
var rb *EditorBuffer
for _, buf := range Global.Buffers {
if buf != kb {
rb = buf
break
}
}
if Global.CurrentB == kb {
Global.CurrentB = rb
}
// Delete the killed buffer.
copy(Global.Buffers[i:], Global.Buffers[i+1:])
Global.Buffers[len(Global.Buffers)-1] = nil
Global.Buffers = Global.Buffers[:len(Global.Buffers)-1]
// Replace any instance of the killed buffer in the window list with replacement
Global.WindowTree.mapTree(func(t *winTree) {
if t.buf == kb {
t.buf = rb
}
})
// Delete any mentions of this buffer in the registers
for _, reg := range Global.Registers.Registers {
if reg.Type == RegisterPos && reg.PosBuffer == kb {
reg.Type = RegisterInvalid
reg.PosBuffer = nil
}
}
}
func killBuffer() {
// Deleting the last buffer will result in painful death!
if len(Global.Buffers) == 1 {
Global.Input = "Can't kill the last buffer!"
return
}
// Choose a buffer to kill
choices, _ := bufferChoiceList()
killGivenBuffer(editorChoiceIndex("Kill buffer", choices, -1))
}
func callFunOtherWindow(f func()) {
if !Global.WindowTree.split {
vSplit()
}
switchWindow()
f()
}
func callFunOtherWindowAndGoBack(f func()) {
oldfw := getFocusWindow()
callFunOtherWindow(f)
getFocusWindow().focused = false
oldfw.setFocus()
}
func getIndexOfCurrentBuffer() int {
win := getFocusWindow()
for i, buf := range Global.Buffers {
if buf == win.buf {
return i
}
}
return -1
}
func KillBufferAndWindow() {
bufi := getIndexOfCurrentBuffer()
closeThisWindow()
killGivenBuffer(bufi)
}