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Handle long lines and partially visibile paragraphs

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This commit is contained in:
bloeys
2022-08-01 06:53:07 +04:00
parent dd61b2a871
commit 7bb7e25e0d
1 changed files with 56 additions and 12 deletions
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68
main.go
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@ -279,10 +279,18 @@ func (nt *nterm) MainUpdate() {
paraIt := nt.Paras.Iterator()
for p, done := paraIt.NextPtr(); !done; p, done = paraIt.NextPtr() {
if !IsParaValid(nt.textBuf, p) {
paraStatus := getParaStatus(nt.textBuf, p)
if paraStatus == ParaStatus_Invalid {
continue
}
// If start index is invalid but end index is still valid then we push the start into a valid position
if paraStatus == ParaStatus_PartiallyInvalid {
diff := nt.textBuf.WrittenElements - nt.firstValidPara.StartIndex_WriteCount
deltaToValid := diff - uint64(nt.textBuf.Cap) + 1 // How much we need to move startIndex to be barely valid
nt.firstValidPara.StartIndex_WriteCount = clamp(nt.firstValidPara.StartIndex_WriteCount+deltaToValid, 0, nt.firstValidPara.EndIndex_WriteCount-1)
}
nt.firstValidPara = p
break
}
@ -318,9 +326,14 @@ func (nt *nterm) MainUpdate() {
func (nt *nterm) ReadInputs() {
if input.KeyClicked(sdl.K_RETURN) || input.KeyClicked(sdl.K_KP_ENTER) {
nt.cursorCharIndex = nt.cmdBufLen // This is so \n is written to the end of the cmdBuf
nt.WriteToCmdBuf([]rune{'\n'})
nt.HandleReturn()
if nt.cmdBufLen > 0 {
nt.cursorCharIndex = nt.cmdBufLen // This is so \n is written to the end of the cmdBuf
nt.WriteToCmdBuf([]rune{'\n'})
nt.HandleReturn()
} else {
nt.WriteToTextBuf([]byte{'\n'})
}
}
// Cursor movement and scroll
@ -337,7 +350,11 @@ func (nt *nterm) ReadInputs() {
}
if input.KeyDown(sdl.K_LCTRL) && input.KeyClicked(sdl.K_END) {
nt.scrollPosRel = nt.textBuf.Len - 1
charsPerLine, _ := nt.GridSize()
nt.scrollPosRel = FindNLinesIndexIterator(nt.textBuf.Iterator(), nt.Paras.Iterator(), nt.textBuf.Len-1, -nt.scrollSpd, charsPerLine-1)
nt.scrollPosRel = clamp(nt.scrollPosRel, int64(nt.textBuf.RelIndexFromWriteCount(nt.firstValidPara.StartIndex_WriteCount)), nt.textBuf.Len-1)
} else if input.KeyDown(sdl.K_LCTRL) && input.KeyClicked(sdl.K_HOME) {
nt.scrollPosRel = 0
}
@ -649,6 +666,7 @@ func (p *nterm) HandleReturn() {
func (p *nterm) ParseParas(bs []byte) {
// @TODO We should virtually break lines when they are too long
checkedBytes := uint64(0)
for len(bs) > 0 {
@ -671,11 +689,6 @@ func (p *nterm) WritePara(para *Para) {
p.Paras.Write(*para)
}
func IsParaValid(textBuf *ring.Buffer[byte], p *Para) bool {
isValid := textBuf.WrittenElements-p.StartIndex_WriteCount < uint64(textBuf.Cap)
return isValid
}
func (p *nterm) ClearActiveCmd() {
if p.activeCmd == nil {
@ -1000,7 +1013,7 @@ func FindNLinesIndexIterator(it ring.Iterator[byte], paraIt ring.Iterator[Para],
if startMinusOneIndexByte == '\n' {
charsIntoLine := getCharGridPosX(it.Buf.Iterator(), paraIt, startIndex-2, charsPerLine)
charsIntoLine := getCharGridPosX(it.Buf.Iterator(), paraIt, clamp(startIndex-2, 0, it.Buf.Len-1), charsPerLine)
if charsIntoLine > 0 {
charsSeenThisLine = charsPerLine - charsIntoLine
}
@ -1113,7 +1126,7 @@ func GetParaFromTextBufIndex(it ring.Iterator[byte], paraIt ring.Iterator[Para],
break
}
// println("Ticks to finding para:", ticks)
println("Ticks to finding para:", ticks)
if outPara == nil {
panic("Could not find para")
@ -1121,3 +1134,34 @@ func GetParaFromTextBufIndex(it ring.Iterator[byte], paraIt ring.Iterator[Para],
return outPara, pIndex
}
type ParaStatus byte
const (
ParaStatus_Unknown ParaStatus = iota
ParaStatus_Valid
// PartiallyInvalid is when the start index is invalid but the end index is in a valid position
ParaStatus_PartiallyInvalid
ParaStatus_Invalid
)
// IsParaValid returns true only if the status is ParaStatus_Valid
func IsParaValid(textBuf *ring.Buffer[byte], p *Para) bool {
isValid := textBuf.WrittenElements-p.StartIndex_WriteCount < uint64(textBuf.Cap)
return isValid
}
func getParaStatus(textBuf *ring.Buffer[byte], p *Para) ParaStatus {
startValid := textBuf.WrittenElements-p.StartIndex_WriteCount < uint64(textBuf.Cap)
if startValid {
return ParaStatus_Valid
}
endValid := textBuf.WrittenElements-p.EndIndex_WriteCount < uint64(textBuf.Cap)
if endValid {
return ParaStatus_PartiallyInvalid
}
return ParaStatus_Invalid
}