82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
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package readline
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import (
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"fmt"
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"kitty/tools/tui/loop"
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"kitty/tools/wcswidth"
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)
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var _ = fmt.Print
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const ST = "\x1b\\"
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const PROMPT_MARK = "\x1b]133;"
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type RlInit struct {
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Prompt string
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ContinuationPrompt string
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EmptyContinuationPrompt bool
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DontMarkPrompts bool
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}
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type Readline struct {
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prompt string
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prompt_len int
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continuation_prompt string
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continuation_prompt_len int
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mark_prompts bool
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loop *loop.Loop
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// The number of lines after the initial line
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cursor_y int
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// Input lines
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lines []string
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// The line the cursor is at currently
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cursor_line int
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// The offset into the text of the cursor line
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cursor_pos_in_line int
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}
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func New(loop *loop.Loop, r RlInit) *Readline {
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ans := &Readline{
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prompt: r.Prompt, prompt_len: wcswidth.Stringwidth(r.Prompt), mark_prompts: !r.DontMarkPrompts,
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loop: loop, lines: []string{""},
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}
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if r.ContinuationPrompt != "" || !r.EmptyContinuationPrompt {
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ans.continuation_prompt = r.ContinuationPrompt
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if ans.continuation_prompt == "" {
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ans.continuation_prompt = "> "
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}
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}
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if ans.mark_prompts {
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ans.prompt = PROMPT_MARK + "A" + ST + ans.prompt
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ans.continuation_prompt = PROMPT_MARK + "A;k=s" + ST + ans.continuation_prompt
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}
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return ans
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}
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func (self *Readline) Start() {
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self.loop.SetCursorShape(loop.BAR_CURSOR, true)
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self.Redraw()
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}
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func (self *Readline) Redraw() {
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self.loop.StartAtomicUpdate()
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self.RedrawNonAtomic()
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self.loop.EndAtomicUpdate()
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}
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func (self *Readline) RedrawNonAtomic() {
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self.redraw()
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}
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func (self *Readline) End() {
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self.loop.QueueWriteString("\r\n")
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self.loop.SetCursorShape(loop.BLOCK_CURSOR, true)
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if self.mark_prompts {
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self.loop.QueueWriteString(PROMPT_MARK + "C" + ST)
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}
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}
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