xplor / xplor.go

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
// 2010 - Mathieu Lonjaret

package main

import (
	"os"
//	"bytes"
	"path"
	"fmt"
	"strings"
	"sort"
	"flag"
	//	"bytes"

	"goplan9.googlecode.com/hg/plan9"
	"goplan9.googlecode.com/hg/plan9/acme"
	"bitbucket.org/fhs/goplumb/plumb"
)

var (
	root string
	w *acme.Win
	PLAN9 = os.Getenv("PLAN9")
	unfolded map[int] string
//	chartoline *List 
)

const (
	NBUF = 512
	INDENT = "	"
	dirflag = "+ "
)

type dir struct  {
	charaddr string
	depth int
}
	
func usage() {
	fmt.Fprintf(os.Stderr, "usage: xplor [path] \n")
	flag.PrintDefaults()
	os.Exit(2)
}

//TODO: send error messages to +Errors instead of Stderr? easy sol: start xplor from the acme tag
//TODO: make a closeAll command ?
//TODO: keep a list of unfolded  dirs because it will be faster to go through that list and find the right parent for a file when constructing the fullpath, than going recursively up. After some experimenting, it's not that easy to do, so I may as well make a full rework that uses a tree in memory to map the filesystem tree, rather than go all textual.

func main() {
	flag.Usage = usage
	flag.Parse()

	args := flag.Args()

	switch len(args) {
	case 0:
		root, _ = os.Getwd()
	case 1:
		temp := path.Clean(args[0])
		if temp[0] != '/' {
			cwd, _ := os.Getwd()
			root = path.Join(cwd, temp)
		} else {
			root = temp
		}
	default:
		usage()
	}

	err := initWindow()
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		return
	}
//	unfolded = make(map[string] int, 1)

	for word := range events() {
		if word == "DotDot" {
			doDotDot()
			continue
		}
		if word[0] == 'X' {
			onExec(word[1:len(word)])
			continue
		}
		if len(word) >= 3 {
			if word[0:3] == "Win" {
				doWin(word[3:len(word)])
				continue
			}
		}
		onLook(word)
	}
}

/*
func initCharToLine(lines int) (err os.Error) {
	b := make([]byte, 64)
	var (
		m, n int
		addr string = "#1+1-"
	)
	chartoline.Init() 

	for i:= 0; i < lines; i++ {
		err = w.Addr("%s", addr)
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String())
			os.Exit(1)
		}
		n, err = w.Read("xdata", b)
		if err != nil && err != os.EOF{
			fmt.Fprintf(os.Stderr, err.String())
			os.Exit(1)
		}
		m += n
		print(m, "\n")
		chartoline[i] = m
		addr = "#" + fmt.Sprint(m+1) + "+1-"
	}
	for i:= 0; i < lines; i++ {
		print(i, ": ", chartoline[i], "\n")
	}
	return err
}
*/

func initWindow() os.Error {
	var err os.Error = nil
	w, err = acme.New()
	if err != nil {
		return err
	}

	title := "xplor-" + root
	w.Name(title)
	tag := "DotDot Win"
	w.Write("tag", []byte(tag))
	_, err = printDirContents(root, 0)
//	initCharToLine(len(newlines))
	return err
}

func printDirContents(dirpath string, depth int) (newlines []int, err os.Error) {
	var m int
	currentDir, err := os.Open(dirpath, os.O_RDONLY, 0644)
	if err != nil {
		return newlines, err
	}
	names, err := currentDir.Readdirnames(-1)
	if err != nil {
		return newlines, err
	}
	currentDir.Close()

	sort.SortStrings(names)
	indents := ""
	for i := 0; i < depth; i++ {
		indents = indents + INDENT
	}
	for _, v := range names {
		// we want to be fast so we assume (for the printing) that any name containing a dot is not a dir
		if !strings.Contains(v, ".") {
			fullpath := path.Join(dirpath, v)
			fi, err := os.Lstat(fullpath)
			if err != nil {
				return newlines, err
			}
			if fi.IsDirectory() {
				m, _ = w.Write("data", []byte(dirflag+indents+v+"\n"))
				newlines = append(newlines, m)
			}
		} else {
			m, _ = w.Write("data", []byte("  "+indents+v+"\n"))
			newlines = append(newlines, m)
		}
	}

	if depth == 0 {
	//lame trick for now to dodge the out of range issue, until my address-foo gets better
		w.Write("body", []byte("\n"))
		w.Write("body", []byte("\n"))
		w.Write("body", []byte("\n"))
	} 

	return newlines, err
}

func readLine(addr string) ([]byte, os.Error) {
	var b []byte = make([]byte, NBUF)
	var err os.Error = nil
	err = w.Addr("%s", addr)
	if err != nil {
		return b, err
	}
	n, err := w.Read("xdata", b)

	// remove dirflag, if any
	if n < 2 {
		return b[0 : n-1], err
	}
	return b[2 : n-1], err
}

func getDepth(line []byte) (depth int, trimedline string) {
	trimedline = strings.TrimLeft(string(line), INDENT)
	depth = (len(line) - len(trimedline)) / len(INDENT)
	return depth, trimedline
}

func isFolded(charaddr string) (bool, os.Error) {
	var err os.Error = nil
	var b []byte
	addr := "#" + charaddr + "+1-"
	b, err = readLine(addr)
	if err != nil {
		return true, err
	}
	depth, _ := getDepth(b)
	addr = "#" + charaddr + "+-"
	b, err = readLine(addr)
	if err != nil {
		return true, err
	}
	nextdepth, _ := getDepth(b)
	return (nextdepth <= depth), err
}

/*
func getParent(line string) string {
	d, leaf := getDepth(line)
	var parent string 
	for k, v := range unfolded {
			fullpath := path.Join(k, leaf)
			fi, err := os.Lstat(fullpath)
			if err == nil {
			fmt.Fprintf(os.Stderr, err.String())
		return
	}		
		dist, _ := strconv.Atoi(v.charaddr)
		dist-= pos
		if dist > 0 && dist < min {
			depth, _ := getDepth(b)
			if v.depth == depth - 1 {
				min = dist
				parent = k
			}
		}
	}
	print(parent, "\n")
	return parent
}
*/

func getParents(charaddr string, depth int, prevline int) string {
	var addr string
	if depth == 0 {
		return ""
	}
	if prevline == 1 {
		addr = "#" + charaddr + "-+"
	} else {
		addr = "#" + charaddr + "-" + fmt.Sprint(prevline-1)
	}
	for {
		b, err := readLine(addr)
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String())
			os.Exit(1)
		}
		newdepth, line := getDepth(b)
		if newdepth < depth {
			fullpath := path.Join(getParents(charaddr, newdepth, prevline), line)
			return fullpath
		}
		prevline++
		addr = "#" + charaddr + "-" + fmt.Sprint(prevline-1)
	}
	return ""
}

/*
func addToCharToLine(newlines []int, where int) {
	for i:=0; i<len(newlines); i++ {
		print(newlines[i], " ")
	}
}

//IDEA: get the offset from the total size before and after the folding
func removeFromCharToLine([]newLines, offset) {

}

func addToUnfolded(fullpath string, newdir dir) os.Error {
	_, ok := unfolded[fullpath]
	if ok {
		errstring := fullpath + " already in list"
		return os.NewError(errstring)
	}
	unfolded[fullpath] = newdir
	for k,v := range unfolded {
		print(k, " ", v.charaddr, " ", v.depth, "\n")
	}
	print("\n")
	return nil
}

//TODO: remove all the children as well
func removeFromUnfolded(fullpath string) os.Error {
	for k, _ := range unfolded {
		if strings.Contains(k, fullpath) {
			unfolded[k] = dir{}, false
		}
	}
	for k,v := range unfolded {
		print(k, " ", v.charaddr, " ", v.depth, "\n")
	}
	print("\n")
	return nil
}
*/

//TODO: maybe break this one in a fold and unfold functions
func onLook(charaddr string) {
	// reconstruct full path and check if file or dir
	addr := "#" + charaddr + "+1-"
	b, err := readLine(addr)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		return
	}
	depth, line := getDepth(b)
	fullpath := path.Join(root, getParents(charaddr, depth, 1), line)
//	fullpath := path.Join(root, getParent(charaddr), line)
	fi, err := os.Lstat(fullpath)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		return
	}

	if !fi.IsDirectory() {
		// not a dir -> send that file to the plumber
		port, err := plumb.Open("send", plan9.OWRITE)
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String())
			return
		}
		defer port.Close()
		port.Send(&plumb.Msg{
			Src:  "xplor",
			Dst:  "",
			WDir: "/",
			Kind: "text",
			Attr: map[string]string{},
			Data: []byte(fullpath),
		})
		return
	}

	folded, err := isFolded(charaddr)
	if err != nil {
		fmt.Fprint(os.Stderr, err.String())
		return
	}
	if folded {
		// print dir contents
		addr = "#" + charaddr + "+2-1-#0"
		err = w.Addr("%s", addr)
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String()+addr)
			return
		}
		printDirContents(fullpath, depth+1)
//		newlines, _ := printDirContents(fullpath, depth+1)
//		addToCharToLine(newlines, 1)
//		addToUnfolded(fullpath, dir{charaddr, depth})
	} else {
		// fold, ie delete lines below dir until we hit a dir of the same depth
		addr = "#" + charaddr + "+-"
		nextdepth := depth + 1
		nextline := 1
		for nextdepth > depth {
			err = w.Addr("%s", addr)
			if err != nil {
				fmt.Fprint(os.Stderr, err.String())
				return
			}
			b, err = readLine(addr)
			if err != nil {
				fmt.Fprint(os.Stderr, err.String())
				return
			}
			nextdepth, _ = getDepth(b)
			nextline++
			addr = "#" + charaddr + "+" + fmt.Sprint(nextline-1)
		}
		nextline--
		addr = "#" + charaddr + "+-#0,#" + charaddr + "+" + fmt.Sprint(nextline-2)
		err = w.Addr("%s", addr)
		if err != nil {
			fmt.Fprint(os.Stderr, err.String())
			return
		}
		w.Write("data", []byte(""))
//		removeFromUnfolded(charaddr)
	}
}

//TODO: deal with errors
func getFullPath(charaddr string) (fullpath string, err os.Error) {
	// reconstruct full path and print it to Stdout
	addr := "#" + charaddr + "+1-"
	b, err := readLine(addr)
	if err != nil {
		return fullpath, err
	}
	depth, line := getDepth(b)
	fullpath = path.Join(root, getParents(charaddr, depth, 1), line)
//	fullpath = path.Join(root, getParent(charaddr), line)
	return fullpath, err
}

func doDotDot() {
	// blank the window
	err := w.Addr("0,$")
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		os.Exit(1)
	}
	w.Write("data", []byte(""))

	// restart from ..
	root = path.Clean(root + "/../")
	title := "xplor-" + root
	w.Name(title)
	_, err = printDirContents(root, 0)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		os.Exit(1)
	}
}

// For this function to work as intended, it needs to be coupled with a
// plumbing rule, such as:
// # start rc from xplor in an acme win at the specified path 
// type is text
// src is xplor
// dst is win
// plumb start win rc -c '@{cd '$data'; exec rc -l}'
func doWin(loc string) {
	print("loc: ", loc, "\n")
	var fullpath string
	if loc == "" {
		fullpath = root
	} else {
		var err os.Error
		charaddr := strings.SplitAfter(loc, ",#", 2) 
		fullpath, err = getFullPath(charaddr[1])
			print("fullpath0: ", fullpath, "\n")
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String())
			return
		}
		fi, err := os.Lstat(fullpath)
		if err != nil {
			fmt.Fprintf(os.Stderr, err.String())
			return
		}
		if !fi.IsDirectory() {
			fullpath, _ = path.Split(fullpath)
			print("fullpath1: ", fullpath, "\n")
		}
	}
	print("fullpath: ", fullpath, "\n")
	// send the fullpath as a win command to the plumber
	port, err := plumb.Open("send", plan9.OWRITE)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		return
	}
	defer port.Close()
	port.Send(&plumb.Msg{
		Src:  "xplor",
		Dst:  "win",
		WDir: "/",
		Kind: "text",
		Attr: map[string]string{},
		Data: []byte(fullpath),
	})
	return
}

// on a B2 click event we print the fullpath of the file to Stdout.
// This can come in handy for paths with spaces in it, because the
// plumber will fail to open them.  Printing it to Stdout allows us to do
// whatever we want with it when that happens.
// Also usefull with a dir path: once printed to stdout, a B3 click on
// the path to open it the "classic" acme way.
func onExec(charaddr string) {
	fullpath, err := getFullPath(charaddr)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.String())
		return
	}
	fmt.Fprintf(os.Stderr, fullpath+"\n")
}

func events() <-chan string {
	c := make(chan string, 10)
	go func() {
		for e := range w.EventChan() {
			switch e.C2 {
			case 'x': // execute in tag
				switch string(e.Text) {
				case "Del":
					w.Ctl("delete")
				case "DotDot":
					c <- "DotDot"
				case "Win":
					tmp := ""
					if e.Flag != 0 {
						tmp = string(e.Loc)
					}
					c <- ("Win" + tmp)
				default:
					w.WriteEvent(e)
				}
			case 'X': // execute in body
				c <- ("X" + fmt.Sprint(e.OrigQ0))
			case 'l': // button 3 in tag
				// let the plumber deal with it
				w.WriteEvent(e)
			case 'L': // button 3 in body
				w.Ctl("clean")
				//ignore expansions
				if e.OrigQ0 != e.OrigQ1 {
					continue
				}
				c <- fmt.Sprint(e.OrigQ0)
			}
		}
		w.CloseFiles()
		close(c)
	}()
	return c
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.