109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
package operator
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import (
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"git.gophernest.net/azpect/TextEditor/internal/action"
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tea "github.com/charmbracelet/bubbletea"
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)
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// Implements Operator (x)
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type DeleteOperator struct{}
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func (o DeleteOperator) Operate(m action.Model, start, end action.Position) tea.Cmd {
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switch m.Mode() {
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case action.VisualMode:
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deleteCharSelection(m, start, end)
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case action.VisualLineMode:
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deleteLineSelection(m, start, end)
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case action.VisualBlockMode:
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deleteBlockSelection(m, start, end)
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}
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return nil
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}
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// Double press handles dd - delete the entire line
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func (o DeleteOperator) DoublePress(m action.Model, count int) tea.Cmd {
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// If we have a higher value than lines remaining, we can only run so many times
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opCount := min(count, m.LineCount()-m.CursorY())
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for range opCount {
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y := m.CursorY()
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m.DeleteLine(y)
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if m.LineCount() == 0 {
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m.InsertLine(0, "")
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}
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if y >= m.LineCount() {
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y = m.LineCount() - 1
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}
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m.SetCursorY(y)
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m.ClampCursorX()
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}
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return nil
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}
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func deleteCharSelection(m action.Model, start, end action.Position) {
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if start.Line == end.Line {
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line := m.Line(start.Line)
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endCol := min(end.Col+1, len(line))
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m.SetLine(start.Line, line[:start.Col]+line[endCol:])
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} else {
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startLine := m.Line(start.Line)
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endLine := m.Line(end.Line)
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prefix := startLine[:start.Col]
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suffix := ""
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if end.Col+1 < len(endLine) {
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suffix = endLine[end.Col+1:]
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}
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// Delete from end back to start to preserve indices
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for i := end.Line; i >= start.Line; i-- {
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m.DeleteLine(i)
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}
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m.InsertLine(start.Line, prefix+suffix)
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}
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m.SetCursorY(start.Line)
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m.SetCursorX(start.Col)
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m.ClampCursorX()
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}
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func deleteLineSelection(m action.Model, start, end action.Position) {
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for i := end.Line; i >= start.Line; i-- {
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m.DeleteLine(i)
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}
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if m.LineCount() == 0 {
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m.InsertLine(0, "")
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}
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y := start.Line
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if y >= m.LineCount() {
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y = m.LineCount() - 1
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}
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m.SetCursorY(y)
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m.ClampCursorX()
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}
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func deleteBlockSelection(m action.Model, start, end action.Position) {
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startCol := min(start.Col, end.Col)
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endCol := max(start.Col, end.Col)
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for y := start.Line; y <= end.Line; y++ {
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line := m.Line(y)
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if startCol >= len(line) {
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continue
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}
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ec := min(endCol+1, len(line))
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m.SetLine(y, line[:startCol]+line[ec:])
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}
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m.SetCursorY(start.Line)
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m.SetCursorX(startCol)
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m.ClampCursorX()
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}
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