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Syntax highlighting setup

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This commit is contained in:
bloeys
2022-07-15 15:27:39 +04:00
parent ecd6bdae3e
commit 7f7f90d4c6
2 changed files with 94 additions and 6 deletions
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98
main.go
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@ -26,6 +26,11 @@ import (
"golang.org/x/image/font"
)
type Settings struct {
DefaultColor gglm.Vec4
StringColor gglm.Vec4
}
type Cmd struct {
C *exec.Cmd
Stdout io.ReadCloser
@ -61,6 +66,8 @@ type program struct {
scrollSpd int64
activeCmd *Cmd
Settings *Settings
}
const (
@ -80,7 +87,6 @@ var (
drawGrid bool
textToShow = ""
textColor = gglm.NewVec4(1, 1, 1, 1)
xOff float32 = 0
yOff float32 = 0
@ -117,6 +123,11 @@ func main() {
cmdBufLen: 0,
scrollSpd: defaultScrollSpd,
Settings: &Settings{
DefaultColor: *gglm.NewVec4(1, 1, 1, 1),
StringColor: *gglm.NewVec4(242/255.0, 244/255.0, 10/255.0, 1),
},
}
p.win.EventCallbacks = append(p.win.EventCallbacks, p.handleSDLEvent)
@ -289,13 +300,89 @@ func (p *program) MainUpdate() {
}
//Draw textBuf
p.lastCmdCharPos.Data = p.GlyphRend.DrawTextOpenGLAbs(p.textBuf[p.scrollPos:p.textBufLen], gglm.NewVec3(0, float32(p.GlyphRend.ScreenHeight)-p.GlyphRend.Atlas.LineHeight, 0), gglm.NewVec4(1, 1, 1, 1)).Data
p.lastCmdCharPos.Data = p.SyntaxHighlightAndDraw(p.textBuf[p.scrollPos:p.textBufLen], gglm.NewVec3(0, float32(p.GlyphRend.ScreenHeight)-p.GlyphRend.Atlas.LineHeight, 0)).Data
sepLinePos.Data = p.lastCmdCharPos.Data
//Draw cmd buf
p.lastCmdCharPos.SetX(0)
p.lastCmdCharPos.AddY(-p.GlyphRend.Atlas.LineHeight)
p.lastCmdCharPos.Data = p.GlyphRend.DrawTextOpenGLAbs(p.cmdBuf[:p.cmdBufLen], p.lastCmdCharPos, gglm.NewVec4(1, 1, 1, 1)).Data
p.lastCmdCharPos.Data = p.SyntaxHighlightAndDraw(p.cmdBuf[:p.cmdBufLen], p.lastCmdCharPos).Data
}
func (p *program) SyntaxHighlightAndDraw(text []rune, pos *gglm.Vec3) gglm.Vec3 {
startIndex := 0
startPos := pos.Clone()
currColor := &p.Settings.DefaultColor
inSingleString := false
inDoubleString := false
for i := 0; i < len(text); i++ {
r := text[i]
switch r {
// Text might be drawn in multiple calls, once per color for example. If the first half
// of the text gets drawn and the second half has a newline, the renderer will reset the X pos
// to the middle of the text not the start as it uses the start X position of the second half.
// So to get correct new line handling we handle newlines here
case '\n':
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:i], pos, currColor).Data
pos.SetX(startPos.X())
pos.AddY(-p.GlyphRend.Atlas.LineHeight)
startIndex = i + 1
continue
case '"':
if inSingleString {
continue
}
if !inDoubleString {
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:i], pos, currColor).Data
startIndex = i
inDoubleString = true
currColor = &p.Settings.StringColor
continue
}
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:i+1], pos, currColor).Data
startIndex = i + 1
inDoubleString = false
currColor = &p.Settings.DefaultColor
case '\'':
if inDoubleString {
continue
}
if !inSingleString {
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:i], pos, currColor).Data
startIndex = i
inSingleString = true
currColor = &p.Settings.StringColor
continue
}
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:i+1], pos, &p.Settings.StringColor).Data
startIndex = i + 1
inSingleString = false
currColor = &p.Settings.DefaultColor
}
}
if startIndex < len(text) {
if inDoubleString || inSingleString {
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:], pos, &p.Settings.StringColor).Data
} else {
pos.Data = p.GlyphRend.DrawTextOpenGLAbs(text[startIndex:], pos, &p.Settings.DefaultColor).Data
}
}
return *pos
}
func (p *program) DeletePrevChar() {
@ -321,6 +408,7 @@ func (p *program) DeleteNextChar() {
p.cmdBufLen--
}
// @TODO: Handle double quotes not being sent properly to cmd
func (p *program) HandleReturn() {
cmdRunes := p.cmdBuf[:p.cmdBufLen]
@ -529,12 +617,12 @@ func (p *program) DebugRender() {
if drawManyLines {
const charsPerFrame = 500_000
for i := 0; i < charsPerFrame/charCount; i++ {
p.GlyphRend.DrawTextOpenGLAbsString(str, gglm.NewVec3(xOff, float32(p.GlyphRend.Atlas.LineHeight)*5+yOff, 0), textColor)
p.GlyphRend.DrawTextOpenGLAbsString(str, gglm.NewVec3(xOff, float32(p.GlyphRend.Atlas.LineHeight)*5+yOff, 0), &p.Settings.DefaultColor)
}
p.win.SDLWin.SetTitle(fmt.Sprint("FPS: ", fps, " Draws/f: ", math.Ceil(charsPerFrame/glyphs.MaxGlyphsPerBatch), " chars/f: ", charsPerFrame, " chars/s: ", fps*charsPerFrame))
} else {
charsPerFrame := float64(charCount)
p.GlyphRend.DrawTextOpenGLAbsString(str, gglm.NewVec3(xOff, float32(p.GlyphRend.Atlas.LineHeight)*5+yOff, 0), textColor)
p.GlyphRend.DrawTextOpenGLAbsString(str, gglm.NewVec3(xOff, float32(p.GlyphRend.Atlas.LineHeight)*5+yOff, 0), &p.Settings.DefaultColor)
p.win.SDLWin.SetTitle(fmt.Sprint("FPS: ", fps, " Draws/f: ", math.Ceil(charsPerFrame/glyphs.MaxGlyphsPerBatch), " chars/f: ", int(charsPerFrame), " chars/s: ", fps*int(charsPerFrame)))
}
}