mirror of
https://github.com/bloeys/gopad.git
synced 2025-12-29 06:58:21 +00:00
Basic (and buggy) insert and delete
This commit is contained in:
bloeys
149
editor.go
149
editor.go
@ -6,7 +6,9 @@ import (
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"path/filepath"
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"github.com/bloeys/gopad/settings"
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"github.com/bloeys/nmage/input"
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"github.com/inkyblackness/imgui-go/v4"
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"github.com/veandco/go-sdl2/sdl"
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)
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// hello there my friend
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@ -46,6 +48,23 @@ type Editor struct {
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StartPos float32
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}
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type MousePosInfo struct {
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//Global represents a grid on the whole window (i.e. 0,0 is the top left of the program window)
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GridXGlobal int
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//Global represents a grid on the whole window (i.e. 0,0 is the top left of the program window)
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GridYGlobal int
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//Editor represents a grid on the editor window (i.e. 0,0 is the top left of the editor window)
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GridXEditor int
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//Editor represents a grid on the editor window (i.e. 0,0 is the top left of the editor window)
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GridYEditor int
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//Line is the currently selected line
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Line *Line
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LineNum int
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}
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func (e *Editor) SetCursorPos(x, y int) {
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e.MouseX = x
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e.MouseY = y
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@ -68,8 +87,12 @@ func (e *Editor) RefreshFontSettings() {
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e.CharWidth = imgui.CalcTextSize("abcdefghijklmnopqrstuvwxyz", false, 1000).X / 26
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}
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func (e *Editor) RoundToGrid(x float32) float32 {
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return float32(math.Round(float64(x/e.CharWidth))) * e.CharWidth
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func (e *Editor) RoundToGridX(x float32) float32 {
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return clampF32(float32(math.Round(float64(x/e.CharWidth)))*e.CharWidth, 0, math.MaxFloat32)
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}
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func (e *Editor) RoundToGridY(x float32) float32 {
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return clampF32(float32(math.Round(float64(x/e.LineHeight)))*e.LineHeight, 0, math.MaxFloat32)
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}
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func (e *Editor) UpdateAndDraw(drawStartPos, winSize *imgui.Vec2, newRunes []rune) {
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@ -87,6 +110,26 @@ func (e *Editor) UpdateAndDraw(drawStartPos, winSize *imgui.Vec2, newRunes []run
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drawStartPos.Y += textPadding
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paddedDrawStartPos := *drawStartPos
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//Make edits
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posInfo := e.getPositions(&paddedDrawStartPos)
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e.Insert(&posInfo, newRunes)
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if input.KeyClicked(sdl.K_LEFT) {
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e.MoveMouseXByChars(-1, &posInfo)
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} else if input.KeyClicked(sdl.K_RIGHT) {
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e.MoveMouseXByChars(1, &posInfo)
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}
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if input.KeyClicked(sdl.K_UP) {
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e.MoveMouseYByLines(-1, &posInfo)
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} else if input.KeyClicked(sdl.K_DOWN) {
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e.MoveMouseYByLines(1, &posInfo)
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}
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if input.KeyClicked(sdl.K_BACKSPACE) {
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e.Delete(&posInfo, 1)
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}
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//Draw text
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dl := imgui.WindowDrawList()
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linesToDraw := int(winSize.Y / e.LineHeight)
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@ -96,9 +139,7 @@ func (e *Editor) UpdateAndDraw(drawStartPos, winSize *imgui.Vec2, newRunes []run
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drawStartPos.Y += e.LineHeight
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}
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posInfo := e.getPositions(&paddedDrawStartPos)
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tabCount, charsToOffsetBy := getTabs(posInfo.Line, posInfo.GridXEditor)
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textWidth := float32(len(posInfo.Line.chars)-tabCount+tabCount*settings.TabSize) * e.CharWidth
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lineX := clampF32(float32(posInfo.GridXGlobal)+float32(charsToOffsetBy)*e.CharWidth, 0, paddedDrawStartPos.X+textWidth)
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@ -116,24 +157,92 @@ func (e *Editor) UpdateAndDraw(drawStartPos, winSize *imgui.Vec2, newRunes []run
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// println("Chars:", "'"+charAtCursor+"'", ";", clickedColGridXEditor)
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}
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type mousePosInfo struct {
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func (e *Editor) Insert(posInfo *MousePosInfo, rs []rune) {
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//Global represents a grid on the whole window (i.e. 0,0 is the top left of the program window)
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GridXGlobal int
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//Global represents a grid on the whole window (i.e. 0,0 is the top left of the program window)
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GridYGlobal int
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if len(rs) == 0 {
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return
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}
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//Editor represents a grid on the editor window (i.e. 0,0 is the top left of the editor window)
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GridXEditor int
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//Editor represents a grid on the editor window (i.e. 0,0 is the top left of the editor window)
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GridYEditor int
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l := posInfo.Line
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if len(l.chars) == 0 {
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l.chars = append(l.chars, rs...)
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return
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}
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//Line is the currently selected line
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Line *Line
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LineNum int
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charIndex := getCharIndexFromCursor(posInfo.Line, posInfo.GridXEditor)
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if charIndex == -1 {
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charIndex = 0
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} else if charIndex == len(l.chars)-1 {
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l.chars = append(l.chars, rs...)
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return
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} else {
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charIndex++
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}
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//Make a new array that can accomodate the changes
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c := l.chars
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newLength := len(c) + len(rs)
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l.chars = make([]rune, newLength)
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//Copy the left half (before the changes), then copy the changes in the new space, and
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//lastly copy the pushed elements to the right of the changes
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copy(l.chars, c[:charIndex])
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copy(l.chars[charIndex:], rs)
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copy(l.chars[charIndex+len(rs):], c[charIndex:])
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e.MoveMouseXByChars(len(rs), posInfo)
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}
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func (e *Editor) getPositions(paddedDrawStartPos *imgui.Vec2) mousePosInfo {
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func (e *Editor) Delete(posInfo *MousePosInfo, count int) {
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l := posInfo.Line
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if len(l.chars) == 0 {
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return
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}
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if count >= len(l.chars) {
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l.chars = []rune{}
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return
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}
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charIndex := getCharIndexFromCursor(l, posInfo.GridXEditor)
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if charIndex == -1 {
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return
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}
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l.chars = append(l.chars[:charIndex-count+1], l.chars[charIndex+1:]...)
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e.MoveMouseXByChars(-1, posInfo)
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}
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func (e *Editor) MoveMouseXByChars(charCount int, posInfo *MousePosInfo) {
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if posInfo.GridXEditor == 0 && charCount < 0 {
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return
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}
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delta := float32(charCount) * e.CharWidth
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e.MouseX = int(e.RoundToGridX(float32(e.MouseX) + delta))
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posInfo.GridXGlobal = int(e.RoundToGridX(float32(posInfo.GridXGlobal) + delta))
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posInfo.GridXEditor = int(e.RoundToGridX(float32(posInfo.GridXEditor) + delta))
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}
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func (e *Editor) MoveMouseYByLines(lineCount int, posInfo *MousePosInfo) {
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if lineCount < 0 && posInfo.LineNum == 0 {
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return
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}
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if lineCount > 0 && posInfo.LineNum == e.LineCount {
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return
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}
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delta := float32(lineCount) * e.LineHeight
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e.MouseY = int(e.RoundToGridY(float32(e.MouseY) + delta))
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posInfo.GridYGlobal = int(e.RoundToGridY(float32(posInfo.GridYGlobal) + delta))
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posInfo.GridYEditor = int(e.RoundToGridY(float32(posInfo.GridYEditor) + delta))
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}
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func (e *Editor) getPositions(paddedDrawStartPos *imgui.Vec2) MousePosInfo {
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//Calculate position of cursor in window and grid coords.
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//Window coords are as reported by SDL, but we correct for padding and snap to the nearest
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@ -145,10 +254,10 @@ func (e *Editor) getPositions(paddedDrawStartPos *imgui.Vec2) mousePosInfo {
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//'Global' suffix means the position is in window coords.
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//'Editor' suffix means coords are within the text editor coords, where sidebar and tabs have been adjusted for
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roundedMouseX := e.RoundToGrid(float32(e.MouseX))
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roundedMouseX := e.RoundToGridX(float32(e.MouseX))
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gridXGlobal := clampInt(int(roundedMouseX), 0, math.MaxInt)
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roundedMouseY := e.RoundToGrid(float32(e.MouseY))
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roundedMouseY := e.RoundToGridY(float32(e.MouseY))
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gridYGlobal := clampInt(int(roundedMouseY), 0, math.MaxInt)
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gridXEditor := int(
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@ -161,7 +270,7 @@ func (e *Editor) getPositions(paddedDrawStartPos *imgui.Vec2) mousePosInfo {
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gridYEditor := clampInt(windowYEditor/int(e.LineHeight), 0, e.LineCount)
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startLineIndex := clampInt(int(e.StartPos), 0, e.LineCount)
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return mousePosInfo{
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return MousePosInfo{
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GridXGlobal: gridXGlobal,
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GridYGlobal: gridYGlobal,
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