mirror of https://github.com/liamg/aminal.git
439 lines
11 KiB
Go
439 lines
11 KiB
Go
package terminal
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import (
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"strconv"
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"strings"
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)
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func (terminal *Terminal) processInput(buffer chan rune) {
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// https://en.wikipedia.org/wiki/ANSI_escape_code
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for {
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b := <-buffer
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if b == 0x1b { // if the byte is an escape character, read the next byte to determine which one
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b = <-buffer
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switch b {
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case '[': // CSI: Control Sequence Introducer [
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var final rune
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param := ""
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intermediate := ""
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CSI:
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for {
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b = <-buffer
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switch true {
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case b >= 0x30 && b <= 0x3F:
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param = param + string(b)
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case b >= 0x20 && b <= 0x2F:
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//intermediate? useful?
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intermediate += string(b)
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case b >= 0x40 && b <= 0x7e:
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final = b
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break CSI
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}
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}
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params := strings.Split(param, ";")
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switch final {
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case 'A':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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if terminal.position.Line-distance >= 0 {
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terminal.position.Line -= distance
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} else {
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terminal.position.Line = 0
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}
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case 'B':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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_, h := terminal.GetSize()
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if terminal.position.Line+distance >= h {
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terminal.position.Line = h - 1
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} else {
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terminal.position.Line += distance
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}
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case 'C':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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terminal.position.Col += distance
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w, _ := terminal.GetSize()
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if terminal.position.Col >= w {
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terminal.position.Col = w - 1
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}
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case 'D':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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terminal.position.Col -= distance
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if terminal.position.Col < 0 {
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terminal.position.Col = 0
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}
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case 'E':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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terminal.position.Line += distance
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terminal.position.Col = 0
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case 'F':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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if terminal.position.Line-distance >= 0 {
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terminal.position.Line -= distance
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} else {
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terminal.position.Line = 0
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}
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terminal.position.Col = 0
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case 'G':
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distance := 1
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if len(params) > 0 {
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var err error
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distance, err = strconv.Atoi(params[0])
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if err != nil {
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distance = 1
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}
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}
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terminal.position.Col = distance - 1 // 1 based to 0 based
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case 'H', 'f':
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x, y := 1, 1
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if len(params) == 2 {
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var err error
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if params[0] != "" {
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x, err = strconv.Atoi(string(params[0]))
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if err != nil {
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x = 1
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}
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}
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if params[1] != "" {
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y, err = strconv.Atoi(string(params[y]))
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if err != nil {
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y = 1
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}
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}
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terminal.position.Col = x - 1
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terminal.position.Line = y - 1
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}
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case 'J':
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n := "0"
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if len(params) > 0 {
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n = params[0]
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}
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switch n {
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case "1":
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line := terminal.getBufferedLine(terminal.position.Line)
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if line != nil {
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for i := 0; i <= terminal.position.Col; i++ {
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if i < len(line.Cells) {
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line.Cells[i].r = ' '
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}
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}
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}
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for i := 0; i < terminal.position.Line; i++ {
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line := terminal.getBufferedLine(i)
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if line != nil {
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line.Cells = []Cell{}
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}
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}
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case "0", "":
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line := terminal.getBufferedLine(terminal.position.Line)
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if line != nil {
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line.Cells = line.Cells[:terminal.position.Col]
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}
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_, h := terminal.GetSize()
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for i := terminal.position.Line + 1; i < h; i++ {
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line := terminal.getBufferedLine(i)
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if line != nil {
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line.Cells = []Cell{}
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}
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}
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case "2":
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_, h := terminal.GetSize()
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for i := 0; i < h; i++ {
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line := terminal.getBufferedLine(i)
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if line != nil {
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line.Cells = []Cell{}
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}
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}
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terminal.position.Col = 0
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terminal.position.Line = 0
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case "3":
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terminal.lines = []Line{}
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terminal.position.Col = 0
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terminal.position.Line = 0
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default:
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terminal.logger.Errorf("Unknown CSI ED sequence: %s", n)
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}
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case 'K': // K - EOL - Erase to end of line
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n := "0"
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if len(params) > 0 {
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n = params[0]
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}
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switch n {
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case "1":
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line := terminal.getBufferedLine(terminal.position.Line)
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if line != nil {
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for i := 0; i <= terminal.position.Col; i++ {
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if i < len(line.Cells) {
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line.Cells[i].r = ' '
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}
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}
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}
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case "0", "":
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line := terminal.getBufferedLine(terminal.position.Line)
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if line != nil {
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line.Cells = line.Cells[:terminal.position.Col]
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}
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case "2":
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line := terminal.getBufferedLine(terminal.position.Line)
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if line != nil {
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line.Cells = []Cell{}
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}
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default:
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terminal.logger.Errorf("Unsupported EL: %s", n)
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}
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case 'm':
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// SGR: colour and shit
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for i := range params {
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param := params[i]
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switch param {
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case "0", "":
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terminal.cellAttr = terminal.defaultCellAttr
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case "1", "01":
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terminal.cellAttr.Bold = true
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case "2", "02":
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terminal.cellAttr.Dim = true
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case "4", "04":
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terminal.cellAttr.Underline = true
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case "5", "05":
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terminal.cellAttr.Blink = true
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case "7", "07":
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terminal.cellAttr.Reverse = true
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case "8", "08":
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terminal.cellAttr.Hidden = true
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case "21":
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terminal.cellAttr.Bold = false
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case "22":
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terminal.cellAttr.Dim = false
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case "24":
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terminal.cellAttr.Underline = false
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case "25":
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terminal.cellAttr.Blink = false
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case "27":
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terminal.cellAttr.Reverse = false
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case "28":
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terminal.cellAttr.Hidden = false
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case "39":
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terminal.cellAttr.FgColour = terminal.colourScheme.DefaultFg
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case "30":
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terminal.cellAttr.FgColour = terminal.colourScheme.BlackFg
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case "31":
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terminal.cellAttr.FgColour = terminal.colourScheme.RedFg
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case "32":
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terminal.cellAttr.FgColour = terminal.colourScheme.GreenFg
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case "33":
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terminal.cellAttr.FgColour = terminal.colourScheme.YellowFg
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case "34":
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terminal.cellAttr.FgColour = terminal.colourScheme.BlueFg
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case "35":
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terminal.cellAttr.FgColour = terminal.colourScheme.MagentaFg
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case "36":
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terminal.cellAttr.FgColour = terminal.colourScheme.CyanFg
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case "37":
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terminal.cellAttr.FgColour = terminal.colourScheme.WhiteFg
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case "90":
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terminal.cellAttr.FgColour = terminal.colourScheme.DarkGreyFg
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case "91":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightRedFg
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case "92":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightGreenFg
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case "93":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightYellowFg
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case "94":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightBlueFg
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case "95":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightMagentaFg
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case "96":
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terminal.cellAttr.FgColour = terminal.colourScheme.LightCyanFg
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case "97":
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terminal.cellAttr.FgColour = terminal.colourScheme.WhiteFg
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case "49":
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terminal.cellAttr.BgColour = terminal.colourScheme.DefaultBg
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case "40":
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terminal.cellAttr.BgColour = terminal.colourScheme.BlackBg
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case "41":
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terminal.cellAttr.BgColour = terminal.colourScheme.RedBg
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case "42":
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terminal.cellAttr.BgColour = terminal.colourScheme.GreenBg
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case "43":
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terminal.cellAttr.BgColour = terminal.colourScheme.YellowBg
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case "44":
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terminal.cellAttr.BgColour = terminal.colourScheme.BlueBg
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case "45":
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terminal.cellAttr.BgColour = terminal.colourScheme.MagentaBg
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case "46":
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terminal.cellAttr.BgColour = terminal.colourScheme.CyanBg
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case "47":
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terminal.cellAttr.BgColour = terminal.colourScheme.WhiteBg
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case "100":
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terminal.cellAttr.BgColour = terminal.colourScheme.DarkGreyBg
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case "101":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightRedBg
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case "102":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightGreenBg
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case "103":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightYellowBg
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case "104":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightBlueBg
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case "105":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightMagentaBg
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case "106":
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terminal.cellAttr.BgColour = terminal.colourScheme.LightCyanBg
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case "107":
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terminal.cellAttr.BgColour = terminal.colourScheme.WhiteBg
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default:
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terminal.logger.Errorf("Unknown SGR control sequence: (ESC[%s%s%s)", param, intermediate, string(final))
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}
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//terminal.logger.Debugf("SGR control sequence: (ESC[%s%s%s)", param, intermediate, string(final))
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}
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default:
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switch param + intermediate + string(final) {
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case "?25h":
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terminal.showCursor()
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case "?25l":
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terminal.hideCursor()
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case "?12h":
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// todo enable cursor blink
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case "?12l":
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// todo disable cursor blink
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default:
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terminal.logger.Errorf("Unknown CSI control sequence: 0x%02X (ESC[%s%s%s)", final, param, intermediate, string(final))
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}
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}
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case 0x5d: // OSC: Operating System Command
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b = <-buffer
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switch b {
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case rune('0'):
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b = <-buffer
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if b == rune(';') {
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title := []rune{}
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for {
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b = <-buffer
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if b == 0x07 {
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break
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}
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title = append(title, b)
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}
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terminal.logger.Debugf("Terminal title set to: %s", string(title))
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terminal.title = string(title)
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} else {
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terminal.logger.Errorf("Invalid OSC 0 control sequence: 0x%02X", b)
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}
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default:
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terminal.logger.Errorf("Unknown OSC control sequence: 0x%02X", b)
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}
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case rune('c'):
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terminal.logger.Errorf("RIS not yet supported")
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case rune(')'), rune('('):
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b = <-buffer
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// todo charset changes
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//terminal.logger.Debugf("Ignoring character set control code )%s", string(b))
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case '>':
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// numeric char selection @todo
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case '=':
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//alternate char selection @todo
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default:
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terminal.logger.Errorf("Unknown control sequence: 0x%02X [%s]", b, string(b))
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}
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} else {
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switch b {
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case 0x0a:
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_, h := terminal.GetSize()
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if terminal.position.Line+1 >= h {
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terminal.lines = append(terminal.lines, NewLine())
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} else {
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terminal.position.Line++
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}
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case 0x0d:
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terminal.position.Col = 0
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case 0x08:
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// backspace
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terminal.position.Col--
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case 0x07:
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// @todo ring bell
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default:
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// render character at current location
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// fmt.Printf("%s\n", string([]byte{b}))
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terminal.writeRune(b)
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}
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}
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terminal.triggerOnUpdate()
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}
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}
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