63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
|
|
|
|
package readline
|
|
|
|
import (
|
|
"fmt"
|
|
"kitty/tools/wcswidth"
|
|
)
|
|
|
|
var _ = fmt.Print
|
|
|
|
func (self *Readline) write_line_with_prompt(line, prompt string, screen_width int) int {
|
|
self.loop.QueueWriteString(prompt)
|
|
self.loop.QueueWriteString(line)
|
|
w := wcswidth.Stringwidth(prompt) + wcswidth.Stringwidth(line)
|
|
return w / screen_width
|
|
}
|
|
|
|
func (self *Readline) move_cursor_to_text_position(pos, screen_width int) int {
|
|
num_of_lines := pos / screen_width
|
|
if num_of_lines > 0 {
|
|
self.loop.MoveCursorVertically(num_of_lines)
|
|
}
|
|
self.loop.QueueWriteString("\r")
|
|
x := pos % screen_width
|
|
self.loop.MoveCursorHorizontally(x)
|
|
return num_of_lines
|
|
}
|
|
|
|
func (self *Readline) redraw() {
|
|
if self.cursor_y > 0 {
|
|
self.loop.MoveCursorVertically(-self.cursor_y)
|
|
}
|
|
self.loop.QueueWriteString("\r")
|
|
self.loop.ClearToEndOfScreen()
|
|
y := 0
|
|
line_with_cursor := 0
|
|
screen_size, err := self.loop.ScreenSize()
|
|
if err != nil {
|
|
screen_size.WidthCells = 80
|
|
screen_size.HeightCells = 24
|
|
}
|
|
for i, line := range self.lines {
|
|
p := self.prompt
|
|
if i > 0 {
|
|
p = self.continuation_prompt
|
|
}
|
|
num_lines := self.write_line_with_prompt(line, p, int(screen_size.WidthCells))
|
|
if i == self.cursor.Y {
|
|
line_with_cursor = y
|
|
}
|
|
y += num_lines
|
|
}
|
|
self.loop.MoveCursorVertically(-y + line_with_cursor)
|
|
line := self.lines[self.cursor.Y]
|
|
plen := self.prompt_len
|
|
if self.cursor.Y > 0 {
|
|
plen = self.continuation_prompt_len
|
|
}
|
|
line_with_cursor += self.move_cursor_to_text_position(plen+wcswidth.Stringwidth(line[:self.cursor.X]), int(screen_size.WidthCells))
|
|
self.cursor_y = line_with_cursor
|
|
}
|