Functional browser added notes
This commit is contained in:
parent
0398caf9e3
commit
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314
cui/cui.go
Normal file
314
cui/cui.go
Normal file
@ -0,0 +1,314 @@
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package cui
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import (
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"strings"
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"bytes"
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"fmt"
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"bufio"
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"os"
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"os/exec"
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)
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var shapes = map[string]string{
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"wall": "│",
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"ceiling": "─",
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"tl": "┌",
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"tr": "┐",
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"bl": "└",
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"br": "┘",
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"scroll-thumb": "▉",
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"scroll-track": "░",
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}
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var screenInit bool = false
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type Screen struct {
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Height int
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Width int
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Windows []*Window
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Activewindow int
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}
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type box struct {
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row1 int
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col1 int
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row2 int
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col2 int
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}
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type Window struct {
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Box box
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Scrollbar bool
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Scrollposition int
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Content []string
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drawBox bool
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Active bool
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}
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func (s *Screen) AddWindow(r1, c1, r2, c2 int, scroll, border bool) {
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w := Window{box{r1, c1, r2, c2}, scroll, 0, []string{}, border, false}
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s.Windows = append(s.Windows, &w)
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}
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func (s Screen) DrawFullScreen() {
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s.Clear()
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// w := s.Windows[s.Activewindow]
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for _, w := range s.Windows {
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if w.drawBox {
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w.DrawBox()
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}
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w.DrawContent()
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}
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MoveCursorTo(s.Height - 1, 1)
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}
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func (s Screen) Clear() {
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fill := strings.Repeat(" ", s.Width)
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for i := 0; i <= s.Height; i++ {
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MoveCursorTo(i, 0)
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fmt.Print(fill)
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}
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}
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func (s Screen) SetCharMode() {
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exec.Command("stty", "-F", "/dev/tty", "cbreak", "min", "1").Run()
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exec.Command("stty", "-F", "/dev/tty", "-echo").Run()
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fmt.Print("\033[?25l")
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}
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// Checks for a screen resize and resizes windows if needed
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// Then redraws the screen. Takes a bool to decide whether
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// to redraw the full screen or just the content. On a resize
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// event, the full screen will always be redrawn.
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func (s *Screen) ReflashScreen(clearScreen bool) {
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oldh, oldw := s.Height, s.Width
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s.GetSize()
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if s.Height != oldh || s.Width != oldw {
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for _, w := range s.Windows {
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w.Box.row2 = s.Height - 2
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w.Box.col2 = s.Width
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}
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s.DrawFullScreen()
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} else if clearScreen {
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s.DrawFullScreen()
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} else {
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s.Windows[s.Activewindow].DrawContent()
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}
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}
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func (s *Screen) GetSize() {
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cmd := exec.Command("stty", "size")
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cmd.Stdin = os.Stdin
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out, err := cmd.Output()
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if err != nil {
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fmt.Println("Fatal error: Unable to retrieve terminal size")
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os.Exit(1)
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}
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var h, w int
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fmt.Sscan(string(out), &h, &w)
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s.Height = h
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s.Width = w
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}
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func (w *Window) DrawBox(){
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moveThenDrawShape(w.Box.row1, w.Box.col1, "tl")
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moveThenDrawShape(w.Box.row1, w.Box.col2, "tr")
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moveThenDrawShape(w.Box.row2, w.Box.col1, "bl")
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moveThenDrawShape(w.Box.row2, w.Box.col2, "br")
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for i := w.Box.col1 + 1; i < w.Box.col2; i++ {
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moveThenDrawShape(w.Box.row1, i, "ceiling")
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moveThenDrawShape(w.Box.row2, i, "ceiling")
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}
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for i:= w.Box.row1 + 1; i < w.Box.row2; i++ {
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moveThenDrawShape(i, w.Box.col1, "wall")
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moveThenDrawShape(i, w.Box.col2, "wall")
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}
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}
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func (w *Window) DrawContent(){
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var maxlines, borderw, contenth int
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if w.drawBox {
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borderw, contenth = -1, 1
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} else {
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borderw, contenth = 1, 0
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}
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height, width := w.Box.row2 - w.Box.row1 + borderw, w.Box.col2 - w.Box.col1 + borderw
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content := WrapLines(w.Content, width)
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if len(content) < w.Scrollposition + height {
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maxlines = len(content)
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} else {
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maxlines = w.Scrollposition + height
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}
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for i := w.Scrollposition; i < maxlines; i++ {
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MoveCursorTo(w.Box.row1 + contenth + i - w.Scrollposition, w.Box.col1 + contenth)
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fmt.Print( strings.Repeat(" ", width) )
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MoveCursorTo(w.Box.row1 + contenth + i - w.Scrollposition, w.Box.col1 + contenth)
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fmt.Print(content[i])
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}
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}
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func (w *Window) ScrollDown() {
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height := w.Box.row2 - w.Box.row1 - 1
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contentLength := len(w.Content)
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if w.Scrollposition < contentLength - height {
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w.Scrollposition++
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} else {
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fmt.Print("\a")
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}
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}
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func (w *Window) ScrollUp() {
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if w.Scrollposition > 0 {
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w.Scrollposition--
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} else {
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fmt.Print("\a")
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}
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}
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//--------------------------------------------------------------------------//
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// //
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// F U N C T I O N S //
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// //
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//--------------------------------------------------------------------------//
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func drawShape(shape string) {
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if val, ok := shapes[shape]; ok {
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fmt.Printf("%s", val)
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} else {
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fmt.Print("x")
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}
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}
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func moveThenDrawShape(r, c int, s string) {
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MoveCursorTo(r, c)
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drawShape(s)
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}
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func MoveCursorTo(row, col int) {
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fmt.Printf("\033[%d;%dH", row, col)
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}
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func moveCursorToward(dir string, amount int) {
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directions := map[string]string{
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"up": "A",
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"down": "B",
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"left": "D",
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"right": "C",
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}
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if val, ok := directions[dir]; ok {
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fmt.Printf("\033[%d%s", amount, val)
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}
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}
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func Exit() {
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moveCursorToward("down", 500)
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moveCursorToward("right", 500)
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SetLineMode()
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fmt.Print("\n")
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fmt.Print("\033[?25h")
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os.Exit(0)
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}
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func Clear(dir string) {
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directions := map[string]string{
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"up": "\033[1J",
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"down": "\033[0J",
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"left": "\033[1K",
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"right": "\033[0K",
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"line": "\033[2K",
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"screen": "\033[2J",
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}
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if val, ok := directions[dir]; ok {
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fmt.Print(val)
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}
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}
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func WrapLines(s []string, length int) []string {
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out := []string{}
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for _, ln := range s {
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if len(ln) <= length {
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out = append(out, ln)
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} else {
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words := strings.Split(ln, " ")
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var subout bytes.Buffer
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for i, wd := range words {
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sublen := subout.Len()
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if sublen + len(wd) + 1 <= length {
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if sublen > 0 {
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subout.WriteString(" ")
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}
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subout.WriteString(wd)
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if i == len(words) - 1 {
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out = append(out, subout.String())
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}
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} else {
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out = append(out, subout.String())
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subout.Reset()
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subout.WriteString(wd)
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if i == len(words) - 1 {
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out = append(out, subout.String())
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subout.Reset()
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}
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}
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}
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}
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}
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return out
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}
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func NewScreen() *Screen {
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if screenInit {
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fmt.Println("Fatal error: Cannot create multiple screens")
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os.Exit(1)
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}
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var s Screen
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s.GetSize()
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for i := 0; i < s.Height; i++ {
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fmt.Println()
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}
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SetCharMode()
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Clear("screen")
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screenInit = true
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return &s
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}
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func Getch() rune {
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reader := bufio.NewReader(os.Stdin)
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char, _, err := reader.ReadRune()
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if err != nil {
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return '@'
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}
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return char
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}
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func GetLine() string {
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SetLineMode()
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reader := bufio.NewReader(os.Stdin)
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fmt.Print(": ")
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text, _ := reader.ReadString('\n')
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SetCharMode()
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return text[:len(text)-1]
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}
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func SetCharMode() {
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exec.Command("stty", "-F", "/dev/tty", "cbreak", "min", "1").Run()
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exec.Command("stty", "-F", "/dev/tty", "-echo").Run()
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fmt.Print("\033[?25l")
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}
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func SetLineMode() {
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exec.Command("stty", "-F", "/dev/tty", "-cbreak").Run()
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exec.Command("stty", "-F", "/dev/tty", "echo").Run()
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}
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148
gclient.go
148
gclient.go
@ -4,92 +4,146 @@ import (
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"fmt"
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"gsock/gopher"
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"os"
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"bufio"
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"os/user"
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"regexp"
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"strings"
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"strconv"
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"gsock/cui"
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"errors"
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)
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var history gopher.History = gopher.MakeHistory()
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var screen *cui.Screen
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var userinfo, _ = user.Current()
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func err_exit(err string, code int) {
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fmt.Println(err)
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os.Exit(code)
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}
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func getln() string {
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reader := bufio.NewReader(os.Stdin)
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fmt.Print(": ")
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text, _ := reader.ReadString('\n')
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return text[:len(text)-1]
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func save_file() {
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//TODO add a way to save a file...
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//eg. :save 5 test.txt
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}
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func search(u string) error {
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cui.MoveCursorTo(screen.Height - 1, 0)
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cui.Clear("line")
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fmt.Print("Enter form input: ")
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cui.MoveCursorTo(screen.Height - 1, 17)
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entry := cui.GetLine()
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searchurl := fmt.Sprintf("%s\t%s", u, entry[:len(entry) - 1])
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sv, err := gopher.Visit(searchurl)
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if err != nil {
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return err
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}
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history.Add(sv)
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return nil
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}
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func route_input(s string) {
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sl := strings.ToLower(s)
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if sl == "quit" || sl == "exit" || sl == "q" {
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err_exit("Quitting...", 0)
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} else if num, _ := regexp.MatchString(`^\d+$`, s); num && history.Length > 0 {
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func route_input(s string) error {
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if num, _ := regexp.MatchString(`^\d+$`, s); num && history.Length > 0 {
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linkcount := len(history.Collection[history.Position].Links)
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item, _ := strconv.Atoi(s)
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if item <= linkcount {
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linkurl := history.Collection[history.Position].Links[item - 1]
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v, err := history.Visit(linkurl)
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v, err := gopher.Visit(linkurl)
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if err != nil {
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fmt.Println(err.Error())
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return err
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}
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if v.Address.IsBinary {
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// Query for download here
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fmt.Println("Would you like to download this file?")
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if v.Address.Gophertype == "7" {
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err := search(linkurl)
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if err != nil {
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return err
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}
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} else if v.Address.IsBinary {
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// TODO add download querying here
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} else {
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history.Add(v)
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history.DisplayCurrentView()
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}
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} else {
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fmt.Println("Invalid link id")
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errname := fmt.Sprintf("Invalid link id: %s", s)
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return errors.New(errname)
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}
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} else if sl == "back" || sl == "b" {
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history.GoBack()
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} else if sl == "forward" || sl == "f" {
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history.GoForward()
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} else {
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v, err := history.Visit(s)
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v, err := gopher.Visit(s)
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if err != nil {
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fmt.Println(err.Error())
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return err
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}
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if v.Address.IsBinary {
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// Query for download here
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fmt.Println("Would you like to download this file?")
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if v.Address.Gophertype == "7" {
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err := search(v.Address.Full)
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if err != nil {
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return err
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}
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} else if v.Address.IsBinary {
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// TODO add download querying here
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} else {
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history.Add(v)
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history.DisplayCurrentView()
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}
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}
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return nil
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}
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func make_request(s string) ([]string, gopher.Url, error) {
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u, _ := gopher.MakeUrl(s)
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text, err := gopher.Retrieve(u)
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if err != nil {
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return []string{}, u, err
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}
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return strings.Split(string(text), "\n"), u, nil
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}
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func main() {
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// fmt.Println(userinfo.HomeDir)
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history.Position = -1
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var inp string
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if len(os.Args) >= 2 {
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inp = os.Args[1]
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route_input(inp)
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}
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screen = cui.NewScreen()
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screen.SetCharMode()
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defer cui.Exit()
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screen.AddWindow(1, 1, screen.Height - 2, screen.Width, false, false)
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mainWindow := screen.Windows[0]
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redrawScreen := true
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for {
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inp = getln()
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if inp == "" {
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continue
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screen.ReflashScreen(redrawScreen)
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redrawScreen = false
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c := cui.Getch()
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switch c {
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case 'j', 'J':
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mainWindow.ScrollDown()
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case 'k', 'K':
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mainWindow.ScrollUp()
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case 'q', 'Q':
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cui.Exit()
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case 'b', 'B':
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history.GoBack()
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mainWindow.Scrollposition = 0
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redrawScreen = true
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case 'f', 'F':
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history.GoForward()
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mainWindow.Scrollposition = 0
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redrawScreen = true
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case ':':
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redrawScreen = true
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cui.MoveCursorTo(screen.Height - 1, 0)
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entry := cui.GetLine()
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// Clear entry line
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cui.MoveCursorTo(screen.Height - 1, 0)
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cui.Clear("line")
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if entry == "" {
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cui.MoveCursorTo(screen.Height - 1, 0)
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fmt.Print(" ")
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continue
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}
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err := route_input(entry)
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if err != nil {
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// Display error
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cui.MoveCursorTo(screen.Height, 0)
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fmt.Print("\033[41m\033[37m", err, "\033[0m")
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// Set screen to not reflash
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redrawScreen = false
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} else {
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mainWindow.Scrollposition = 0
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// screen.Clear()
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}
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}
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if history.Position >= 0 {
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mainWindow.Content = history.Collection[history.Position].Content
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}
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route_input(inp)
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}
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}
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|
@ -60,7 +60,7 @@ type Url struct {
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// Types is a map of gophertypes to a string representing their
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// type, to be used when displaying gophermaps
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var Types = map[string]string{
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var types = map[string]string{
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"0": "TXT",
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"1": "MAP",
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"h": "HTM",
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@ -123,7 +123,8 @@ func (h History) Get() (*View, error) {
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func (h *History) GoBack() {
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if h.Position > 0 {
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h.Position--
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h.DisplayCurrentView()
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} else {
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fmt.Print("\a")
|
||||
}
|
||||
}
|
||||
|
||||
@ -136,6 +137,8 @@ func (h *History) GoForward() {
|
||||
if h.Position + 1 < h.Length {
|
||||
h.Position++
|
||||
h.DisplayCurrentView()
|
||||
} else {
|
||||
fmt.Print("\a")
|
||||
}
|
||||
}
|
||||
|
||||
@ -148,33 +151,6 @@ func (h *History) DisplayCurrentView() {
|
||||
h.Collection[h.Position].Display()
|
||||
}
|
||||
|
||||
// The "Visit" receiver is a high level combination of a few
|
||||
// different receivers that makes it easy to create a Url,
|
||||
// make a request to that Url, and add the response and Url
|
||||
// to a View. That View then gets added to the History struct
|
||||
// that the Visit receiver was called on. Returns a boolean
|
||||
// value indicating whether or not the content is binary or
|
||||
// textual data.
|
||||
func (h *History) Visit(addr string) (View, error) {
|
||||
u, err := MakeUrl(addr)
|
||||
if err != nil {
|
||||
return View{}, err
|
||||
}
|
||||
|
||||
text, err := Retrieve(u)
|
||||
if err != nil {
|
||||
return View{}, err
|
||||
}
|
||||
|
||||
var pageContent []string
|
||||
if u.IsBinary {
|
||||
pageContent = []string{string(text)}
|
||||
} else {
|
||||
pageContent = strings.Split(string(text), "\n")
|
||||
}
|
||||
|
||||
return MakeView(u, pageContent), nil
|
||||
}
|
||||
|
||||
// The "ParseMap" receiver is called by a view struct. It
|
||||
// checks if the view is for a gophermap. If not,it does
|
||||
@ -185,17 +161,23 @@ func (h *History) Visit(addr string) (View, error) {
|
||||
// relates to the link position in the links slice. This
|
||||
// receiver does not return anything.
|
||||
func (v *View) ParseMap() {
|
||||
if v.Address.Gophertype == "1" {
|
||||
if v.Address.Gophertype == "1" || v.Address.Gophertype == "7" {
|
||||
for i, e := range v.Content {
|
||||
e = strings.Trim(e, "\r\n")
|
||||
line := strings.Split(e,"\t")
|
||||
var title string
|
||||
if len(line[0]) > 1 {
|
||||
title = line[0][1:]
|
||||
} else {
|
||||
title = ""
|
||||
}
|
||||
if len(line[0]) > 0 && string(line[0][0]) == "i" {
|
||||
v.Content[i] = " " + string(line[0][1:])
|
||||
v.Content[i] = " " + string(title)
|
||||
continue
|
||||
} else if len(line) >= 4 {
|
||||
fulllink := fmt.Sprintf("%s:%s/%s%s", line[2], line[3], string(line[0][0]), line[1])
|
||||
v.Links = append(v.Links, fulllink)
|
||||
linktext := fmt.Sprintf("(%s) %2d %s", Types[string(line[0][0])], len(v.Links), string(line[0][1:]))
|
||||
linktext := fmt.Sprintf("(%s) %2d %s", GetType(string(line[0][0])), len(v.Links), title)
|
||||
v.Content[i] = linktext
|
||||
}
|
||||
}
|
||||
@ -208,9 +190,7 @@ func (v *View) ParseMap() {
|
||||
func (v View) Display() {
|
||||
fmt.Println()
|
||||
for _, el := range v.Content {
|
||||
if el != "." {
|
||||
fmt.Println(el)
|
||||
}
|
||||
fmt.Println(el)
|
||||
}
|
||||
}
|
||||
|
||||
@ -341,3 +321,36 @@ func Retrieve(u Url) ([]byte, error) {
|
||||
}
|
||||
|
||||
|
||||
// The "Visit" function is a high level combination of a few
|
||||
// different types that makes it easy to create a Url,
|
||||
// make a request to that Url, and add the response and Url
|
||||
// to a View. Returns a copy of the view and an error (or nil).
|
||||
func Visit(addr string) (View, error) {
|
||||
u, err := MakeUrl(addr)
|
||||
if err != nil {
|
||||
return View{}, err
|
||||
}
|
||||
|
||||
text, err := Retrieve(u)
|
||||
if err != nil {
|
||||
return View{}, err
|
||||
}
|
||||
|
||||
var pageContent []string
|
||||
if u.IsBinary && u.Gophertype != "7" {
|
||||
pageContent = []string{string(text)}
|
||||
} else {
|
||||
pageContent = strings.Split(string(text), "\n")
|
||||
}
|
||||
|
||||
return MakeView(u, pageContent), nil
|
||||
}
|
||||
|
||||
func GetType(t string) string {
|
||||
if val, ok := types[t]; ok {
|
||||
return val
|
||||
}
|
||||
return "???"
|
||||
|
||||
}
|
||||
|
||||
|
45
notes.md
Normal file
45
notes.md
Normal file
@ -0,0 +1,45 @@
|
||||
Control keys/input:
|
||||
|
||||
q quit
|
||||
j scrolldown
|
||||
k scrollup
|
||||
f toggle showing favorites as subwindow
|
||||
r refresh current page data (re-request)
|
||||
|
||||
:# go to link num
|
||||
:url go to url
|
||||
|
||||
:w # name write linknum to file
|
||||
:w url name write url to file
|
||||
:w name write current to file
|
||||
|
||||
:q quit
|
||||
|
||||
:f add #__ name add link num as favorite
|
||||
:f add url name add link url as favorite
|
||||
:f add name add current page as favorite
|
||||
:f del # delete favorite with num
|
||||
:f del url delete favorite with url
|
||||
:f del name delete favorite with name
|
||||
:f # visit favorite with num
|
||||
|
||||
:s ...kywds search assigned engine with keywords
|
||||
|
||||
:home # set homepage to link num
|
||||
:home url set homepage to url
|
||||
:home visit home
|
||||
|
||||
- - - - - - - - - - - - - - - - - -
|
||||
|
||||
Config format:
|
||||
|
||||
[favorites]
|
||||
colorfield.space ++ gopher://colorfield.space:70/
|
||||
My phlog ++ gopher://circumlunar.space/1/~sloum/
|
||||
|
||||
[options]
|
||||
homepage ++ gopher://sdf.org
|
||||
searchengine ++ gopher://floodgap.place/v2/veronicasomething
|
||||
savelocation ++ ~/Downloads/
|
||||
httpbrowser ++ lynx
|
||||
openhttp ++ true
|
@ -1,48 +0,0 @@
|
||||
package socket
|
||||
|
||||
import (
|
||||
"net"
|
||||
"io/ioutil"
|
||||
"gsock/gopher"
|
||||
"errors"
|
||||
)
|
||||
|
||||
|
||||
|
||||
func Retrieve(u gopher.Url) ([]byte, error) {
|
||||
nullRes := make([]byte, 0)
|
||||
if u.Host == "" || u.Port == "" {
|
||||
return nullRes, errors.New("Incomplete request url")
|
||||
}
|
||||
|
||||
addr := u.Host + ":" + u.Port
|
||||
tcpAddr, err := net.ResolveTCPAddr("tcp", addr)
|
||||
if err != nil {
|
||||
errortext := "Could not find host: " + u.Full
|
||||
return nullRes, errors.New(errortext)
|
||||
}
|
||||
|
||||
conn, err := net.DialTCP("tcp", nil, tcpAddr)
|
||||
if err != nil {
|
||||
return nullRes, err
|
||||
}
|
||||
|
||||
send := u.Resource + "\n"
|
||||
if u.Scheme == "http" || u.Scheme == "https" {
|
||||
send = u.Gophertype
|
||||
}
|
||||
|
||||
_, err = conn.Write([]byte(send))
|
||||
if err != nil {
|
||||
return nullRes, err
|
||||
}
|
||||
|
||||
result, err := ioutil.ReadAll(conn)
|
||||
if err != nil {
|
||||
return nullRes, err
|
||||
}
|
||||
|
||||
return result, err
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user