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GNU GENERAL PUBLIC LICENSE
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How to Apply These Terms to Your New Programs
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Also add information on how to contact you by electronic and paper mail.
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The hypothetical commands `show w' and `show c' should show the appropriate
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For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
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Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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boltbrowser
===========
A CLI Browser for BoltDB Files

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package main
import (
"errors"
"fmt"
"github.com/boltdb/bolt"
"os"
"strings"
)
// A Database, basically a collection of buckets
type BoltDB struct {
buckets []BoltBucket
}
type BoltBucket struct {
name string
pairs []BoltPair
buckets []BoltBucket
parent *BoltBucket
expanded bool
error_flag bool
}
type BoltPair struct {
parent *BoltBucket
key string
val string
}
func (bd *BoltDB) getGenericFromPath(path []string) (*BoltBucket, *BoltPair, error) {
// Check if 'path' leads to a pair
p, err := bd.getPairFromPath(path)
if err == nil {
return nil, p, nil
}
// Nope, check if it leads to a bucket
b, err := bd.getBucketFromPath(path)
if err == nil {
return b, nil, nil
}
// Nope, error
return nil, nil, errors.New("Invalid Path")
}
func (bd *BoltDB) getBucketFromPath(path []string) (*BoltBucket, error) {
if len(path) > 0 {
// Find the BoltBucket with a path == path
var b *BoltBucket
var err error
// Find the root bucket
b, err = memBolt.getBucket(path[0])
if err != nil {
return nil, err
}
if len(path) > 1 {
for p := 1; p < len(path); p++ {
b, err = b.getBucket(path[p])
if err != nil {
return nil, err
}
}
}
return b, nil
}
return nil, errors.New("Invalid Path")
}
func (bd *BoltDB) getPairFromPath(path []string) (*BoltPair, error) {
if len(path) <= 0 {
return nil, errors.New("No Path")
}
b, err := bd.getBucketFromPath(path[:len(path)-1])
if err != nil {
return nil, err
}
// Found the bucket, pull out the pair
p, err := b.getPair(path[len(path)-1])
return p, err
}
func (bd *BoltDB) getVisibleItemCount(path []string) (int, error) {
vis := 0
var ret_err error
if len(path) == 0 {
for i := range bd.buckets {
n, err := bd.getVisibleItemCount(bd.buckets[i].GetPath())
if err != nil {
return 0, err
}
vis += n
}
} else {
b, err := bd.getBucketFromPath(path)
if err != nil {
return 0, err
}
// 1 for the bucket
vis += 1
if b.expanded {
// This bucket is expanded, add up it's children
// * 1 for each pair
vis += len(b.pairs)
// * recurse for buckets
for i := range b.buckets {
n, err := bd.getVisibleItemCount(b.buckets[i].GetPath())
if err != nil {
return 0, err
}
vis += n
}
}
}
return vis, ret_err
}
func (bd *BoltDB) buildVisiblePathSlice() ([]string, error) {
var ret_slice []string
var ret_err error
// The root path, recurse for root buckets
for i := range bd.buckets {
bkt_s, bkt_err := bd.buckets[i].buildVisiblePathSlice([]string{})
if bkt_err == nil {
ret_slice = append(ret_slice, bkt_s...)
} else {
// Something went wrong, set the error flag
bd.buckets[i].error_flag = true
}
}
return ret_slice, ret_err
}
func (bd *BoltDB) getPrevVisiblePath(path []string) []string {
vis_paths, err := bd.buildVisiblePathSlice()
if path == nil {
if len(vis_paths) > 0 {
return strings.Split(vis_paths[len(vis_paths)-1], "/")
} else {
return nil
}
}
if err == nil {
find_path := strings.Join(path, "/")
for i := range vis_paths {
if vis_paths[i] == find_path && i > 0 {
return strings.Split(vis_paths[i-1], "/")
}
}
}
return nil
}
func (bd *BoltDB) getNextVisiblePath(path []string) []string {
vis_paths, err := bd.buildVisiblePathSlice()
if path == nil {
if len(vis_paths) > 0 {
return strings.Split(vis_paths[0], "/")
} else {
return nil
}
}
if err == nil {
find_path := strings.Join(path, "/")
for i := range vis_paths {
if vis_paths[i] == find_path && i < len(vis_paths)-1 {
return strings.Split(vis_paths[i+1], "/")
}
}
}
return nil
}
func (bd *BoltDB) toggleOpenBucket(path []string) error {
// Find the BoltBucket with a path == path
b, err := bd.getBucketFromPath(path)
if err == nil {
b.expanded = !b.expanded
}
return err
}
func (bd *BoltDB) closeBucket(path []string) error {
// Find the BoltBucket with a path == path
b, err := bd.getBucketFromPath(path)
if err == nil {
b.expanded = false
}
return err
}
func (bd *BoltDB) openBucket(path []string) error {
// Find the BoltBucket with a path == path
b, err := bd.getBucketFromPath(path)
if err == nil {
b.expanded = true
}
return err
}
func (bd *BoltDB) getBucket(k string) (*BoltBucket, error) {
for i := range bd.buckets {
if bd.buckets[i].name == k {
return &bd.buckets[i], nil
}
}
return nil, errors.New("Bucket Not Found")
}
func (bd *BoltDB) syncOpenBuckets(shadow *BoltDB) {
// First test this bucket
for i := range bd.buckets {
for j := range shadow.buckets {
if bd.buckets[i].name == shadow.buckets[j].name {
bd.buckets[i].syncOpenBuckets(&shadow.buckets[j])
}
}
}
}
func (bd *BoltDB) refreshDatabase() *BoltDB {
// Reload the database into memBolt
memBolt = new(BoltDB)
db.View(func(tx *bolt.Tx) error {
return tx.ForEach(func(nm []byte, b *bolt.Bucket) error {
bb, err := readBucket(b)
if err == nil {
bb.name = string(nm)
bb.expanded = false
memBolt.buckets = append(memBolt.buckets, *bb)
return nil
}
return err
})
})
return memBolt
}
func (b *BoltBucket) GetPath() []string {
if b.parent != nil {
return append(b.parent.GetPath(), b.name)
} else {
return []string{b.name}
}
}
func (b *BoltBucket) buildVisiblePathSlice(prefix []string) ([]string, error) {
var ret_slice []string
var ret_err error
// Add this bucket to the slice
prefix = append(prefix, b.name)
ret_slice = append(ret_slice, strings.Join(prefix, "/"))
if b.expanded {
// Add subbuckets
for i := range b.buckets {
bkt_s, bkt_err := b.buckets[i].buildVisiblePathSlice(prefix)
if bkt_err == nil {
ret_slice = append(ret_slice, bkt_s...)
} else {
// Something went wrong, set the error flag
b.buckets[i].error_flag = true
}
}
// Add Pairs
for i := range b.pairs {
ret_slice = append(ret_slice, strings.Join(prefix, "/")+"/"+b.pairs[i].key)
}
}
return ret_slice, ret_err
}
func (b *BoltBucket) syncOpenBuckets(shadow *BoltBucket) {
// First test this bucket
b.expanded = shadow.expanded
for i := range b.buckets {
for j := range shadow.buckets {
if b.buckets[i].name == shadow.buckets[j].name {
b.buckets[i].syncOpenBuckets(&shadow.buckets[j])
}
}
}
}
func (b *BoltBucket) getBucket(k string) (*BoltBucket, error) {
for i := range b.buckets {
if b.buckets[i].name == k {
return &b.buckets[i], nil
}
}
return nil, errors.New("Bucket Not Found")
}
func (b *BoltBucket) getPair(k string) (*BoltPair, error) {
for i := range b.pairs {
if b.pairs[i].key == k {
return &b.pairs[i], nil
}
}
return nil, errors.New("Pair Not Found")
}
func (p *BoltPair) GetPath() []string {
return append(p.parent.GetPath(), p.key)
}
/* This is a go-between function (between the boltbrowser structs
* above, and the bolt convenience functions below)
* for taking a boltbrowser bucket and recursively adding it
* and all of it's children into the database.
* Mainly used for moving a bucket from one path to another
* as in the 'renameBucket' function below.
*/
func addBucketFromBoltBucket(path []string, bb *BoltBucket) error {
if err := insertBucket(path, bb.name); err == nil {
bucket_path := append(path, bb.name)
for i := range bb.pairs {
if err = insertPair(bucket_path, bb.pairs[i].key, bb.pairs[i].val); err != nil {
return err
}
}
for i := range bb.buckets {
if err = addBucketFromBoltBucket(bucket_path, &bb.buckets[i]); err != nil {
return err
}
}
}
return nil
}
func deleteKey(path []string) error {
err := db.Update(func(tx *bolt.Tx) error {
// len(b.path)-1 is the key we need to delete,
// the rest are buckets leading to that key
if len(path) == 1 {
// Deleting a root bucket
return tx.DeleteBucket([]byte(path[0]))
} else {
b := tx.Bucket([]byte(path[0]))
if b != nil {
if len(path) > 1 {
for i := range path[1 : len(path)-1] {
b = b.Bucket([]byte(path[i+1]))
if b == nil {
return errors.New("deleteKey: Invalid Path")
}
}
}
// Now delete the last key in the path
var err error
if delete_bkt := b.Bucket([]byte(path[len(path)-1])); delete_bkt == nil {
// Must be a pair
err = b.Delete([]byte(path[len(path)-1]))
} else {
err = b.DeleteBucket([]byte(path[len(path)-1]))
}
return err
} else {
return errors.New("deleteKey: Invalid Path")
}
}
})
return err
}
func readBucket(b *bolt.Bucket) (*BoltBucket, error) {
bb := new(BoltBucket)
b.ForEach(func(k, v []byte) error {
if v == nil {
tb, err := readBucket(b.Bucket(k))
tb.parent = bb
if err == nil {
tb.name = string(k)
bb.buckets = append(bb.buckets, *tb)
}
} else {
tp := BoltPair{key: string(k), val: string(v)}
tp.parent = bb
bb.pairs = append(bb.pairs, tp)
}
return nil
})
return bb, nil
}
func renameBucket(path []string, name string) error {
if name == path[len(path)-1] {
// No change requested
return nil
}
var bb *BoltBucket // For caching the current bucket
err := db.View(func(tx *bolt.Tx) error {
// len(b.path)-1 is the key we need to delete,
// the rest are buckets leading to that key
b := tx.Bucket([]byte(path[0]))
if b != nil {
if len(path) > 1 {
for i := range path[1:len(path)] {
b = b.Bucket([]byte(path[i+1]))
if b == nil {
return errors.New("renameBucket: Invalid Path")
}
}
}
var err error
// Ok, cache b
bb, err = readBucket(b)
if err != nil {
return err
}
} else {
return errors.New("renameBucket: Invalid Bucket")
}
return nil
})
if err != nil {
return err
}
if bb == nil {
return errors.New("renameBucket: Couldn't find Bucket")
}
// Ok, we have the bucket cached, now delete the current instance
if err = deleteKey(path); err != nil {
return err
}
// Rechristen our cached bucket
bb.name = name
// And re-add it
parent_path := path[:len(path)-1]
if err = addBucketFromBoltBucket(parent_path, bb); err != nil {
return err
}
return nil
}
func updatePairKey(path []string, k string) error {
err := db.Update(func(tx *bolt.Tx) error {
// len(b.path)-1 is the key for the pair we're updating,
// the rest are buckets leading to that key
b := tx.Bucket([]byte(path[0]))
if b != nil {
if len(path) > 0 {
for i := range path[1 : len(path)-1] {
b = b.Bucket([]byte(path[i+1]))
if b == nil {
return errors.New("updatePairValue: Invalid Path")
}
}
}
bk := []byte(path[len(path)-1])
v := b.Get(bk)
err := b.Delete(bk)
if err == nil {
// Old pair has been deleted, now add the new one
err = b.Put([]byte(k), v)
}
// Now update the last key in the path
return err
} else {
return errors.New("updatePairValue: Invalid Path")
}
})
return err
}
func updatePairValue(path []string, v string) error {
err := db.Update(func(tx *bolt.Tx) error {
// len(b.GetPath())-1 is the key for the pair we're updating,
// the rest are buckets leading to that key
b := tx.Bucket([]byte(path[0]))
if b != nil {
if len(path) > 0 {
for i := range path[1 : len(path)-1] {
b = b.Bucket([]byte(path[i+1]))
if b == nil {
return errors.New("updatePairValue: Invalid Path")
}
}
}
// Now update the last key in the path
err := b.Put([]byte(path[len(path)-1]), []byte(v))
return err
} else {
return errors.New("updatePairValue: Invalid Path")
}
})
return err
}
func insertBucket(path []string, n string) error {
// Inserts a new bucket named 'n' at 'path'
err := db.Update(func(tx *bolt.Tx) error {
if len(path) == 0 {
// insert at root
_, err := tx.CreateBucket([]byte(n))
if err != nil {
return fmt.Errorf("insertBucket: %s", err)
}
} else {
root_bucket, path := path[0], path[1:]
b := tx.Bucket([]byte(root_bucket))
if b != nil {
for len(path) > 0 {
tst_bucket := ""
tst_bucket, path = path[0], path[1:]
n_b := b.Bucket([]byte(tst_bucket))
if n_b == nil {
// Not a bucket, if we're out of path, just move on
if len(path) != 0 {
// Out of path, error
return errors.New("insertBucket: Invalid Path 1")
}
} else {
b = n_b
}
}
_, err := b.CreateBucket([]byte(n))
return err
}
return fmt.Errorf("insertBucket: Invalid Path %s", root_bucket)
}
return nil
})
return err
}
func insertPair(path []string, k string, v string) error {
// Insert a new pair k => v at path
err := db.Update(func(tx *bolt.Tx) error {
if len(path) == 0 {
// We cannot insert a pair at root
return errors.New("insertPair: Cannot insert pair at root.")
} else {
var err error
b := tx.Bucket([]byte(path[0]))
if b != nil {
if len(path) > 0 {
for i := 1; i < len(path); i++ {
b = b.Bucket([]byte(path[i]))
if b == nil {
return fmt.Errorf("insertPair: %s", err)
}
}
}
err := b.Put([]byte(k), []byte(v))
if err != nil {
return fmt.Errorf("insertPair: %s", err)
}
}
}
return nil
})
return err
}
var f *os.File
func logToFile(s string) error {
var err error
if f == nil {
f, err = os.OpenFile("bolt-log", os.O_RDWR|os.O_APPEND, 0660)
}
if err != nil {
return err
}
if _, err = f.WriteString(s + "\n"); err != nil {
return err
}
if err = f.Sync(); err != nil {
return err
}
return nil
}

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boltbrowser.go Normal file
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package main
import (
"fmt"
"github.com/boltdb/bolt"
"github.com/nsf/termbox-go"
"os"
"syscall"
)
const PROGRAM_NAME = "boltbrowser"
var database_file string
var db *bolt.DB
var memBolt *BoltDB
func mainLoop(memBolt *BoltDB, style Style) {
screens := defaultScreensForData(memBolt)
display_screen := screens[BROWSER_SCREEN_INDEX]
layoutAndDrawScreen(display_screen, style)
for {
event := termbox.PollEvent()
if event.Type == termbox.EventKey {
if event.Key == termbox.KeyCtrlZ {
process, _ := os.FindProcess(os.Getpid())
termbox.Close()
process.Signal(syscall.SIGSTOP)
termbox.Init()
}
new_screen_index := display_screen.handleKeyEvent(event)
if new_screen_index < len(screens) {
display_screen = screens[new_screen_index]
layoutAndDrawScreen(display_screen, style)
} else {
break
}
}
if event.Type == termbox.EventResize {
layoutAndDrawScreen(display_screen, style)
}
}
}
func main() {
var err error
if len(os.Args) != 2 {
fmt.Printf("Usage: %s <filename>\n", PROGRAM_NAME)
os.Exit(1)
}
database_file := os.Args[1]
db, err = bolt.Open(database_file, 0600, nil)
if err != nil {
fmt.Printf("Error reading file: %q\n", err.Error())
os.Exit(1)
}
// First things first, load the database into memory
memBolt.refreshDatabase()
err = termbox.Init()
if err != nil {
panic(err)
}
defer termbox.Close()
style := defaultStyle()
termbox.SetOutputMode(termbox.Output256)
mainLoop(memBolt, style)
defer db.Close()
}

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screen.go Normal file
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package main
import "github.com/nsf/termbox-go"
type Screen interface {
handleKeyEvent(event termbox.Event) int
performLayout()
drawScreen(style Style)
}
const (
BROWSER_SCREEN_INDEX = iota
ABOUT_SCREEN_INDEX
EXIT_SCREEN_INDEX
)
func defaultScreensForData(db *BoltDB) []Screen {
var view_port ViewPort
browser_screen := BrowserScreen{db: db, view_port: view_port}
about_screen := AboutScreen(0)
screens := [...]Screen{
&browser_screen,
&about_screen,
}
return screens[:]
}
func drawBackground(bg termbox.Attribute) {
termbox.Clear(0, bg)
}
func layoutAndDrawScreen(screen Screen, style Style) {
screen.performLayout()
drawBackground(style.default_bg)
screen.drawScreen(style)
termbox.Flush()
}

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screen_about.go Normal file
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package main
import (
"fmt"
"github.com/br0xen/termbox-util"
"github.com/nsf/termbox-go"
)
type Command struct {
key string
description string
}
type AboutScreen int
func drawCommandsAtPoint(commands []Command, x int, y int, style Style) {
x_pos, y_pos := x, y
for index, cmd := range commands {
termbox_util.DrawStringAtPoint(fmt.Sprintf("%6s", cmd.key), x_pos, y_pos, style.default_fg, style.default_bg)
termbox_util.DrawStringAtPoint(cmd.description, x_pos+8, y_pos, style.default_fg, style.default_bg)
y_pos++
if index > 2 && index%2 == 1 {
y_pos++
}
}
}
func (screen *AboutScreen) handleKeyEvent(event termbox.Event) int {
return BROWSER_SCREEN_INDEX
}
func (screen *AboutScreen) performLayout() {}
func (screen *AboutScreen) drawScreen(style Style) {
default_fg := style.default_fg
default_bg := style.default_bg
width, height := termbox.Size()
template := [...]string{
" _______ _______ ___ _______ _______ ______ _______ _ _ _______ _______ ______ ",
"| _ || || | | || _ || _ | | || | _ | || || || _ | ",
"| |_| || _ || | |_ _|| |_| || | || | _ || || || || _____|| ___|| | || ",
"| || | | || | | | | || |_||_ | | | || || |_____ | |___ | |_||_ ",
"| _ | | |_| || |___ | | | _ | | __ || |_| || ||_____ || ___|| __ |",
"| |_| || || || | | |_| || | | || || _ | _____| || |___ | | | |",
"|_______||_______||_______||___| |_______||___| |_||_______||__| |__||_______||_______||___| |_|",
}
first_line := template[0]
start_x := (width - len(first_line)) / 2
start_y := ((height - 2*len(template)) / 2) - 2
x_pos := start_x
y_pos := start_y
if height <= 20 {
title := "BoltBrowser"
start_y = 0
y_pos = 0
termbox_util.DrawStringAtPoint(title, (width-len(title))/2, start_y, style.title_fg, style.title_bg)
} else {
if height < 25 {
start_y = 0
y_pos = 0
}
for _, line := range template {
x_pos = start_x
for _, runeValue := range line {
bg := default_bg
displayRune := ' '
if runeValue != ' ' {
//bg = termbox.Attribute(125)
displayRune = runeValue
termbox.SetCell(x_pos, y_pos, displayRune, default_fg, bg)
}
x_pos++
}
y_pos++
}
}
commands1 := [...]Command{
{"h,←", "close parent"},
{"j,↓", "down"},
{"k,↑", "up"},
{"l,→", "open item"},
{"g", "goto top"},
{"G", "goto bottom"},
{"ctrl+f", "jump down"},
{"ctrl+b", "jump up"},
}
commands2 := [...]Command{
{"p,P", "create pair/at parent"},
{"b,B", "create bucket/at parent"},
{"e", "edit value of pair"},
{"r", "rename pair/bucket"},
{"d", "delete item"},
{"?", "this screen"},
{"q", "quit program"},
}
x_pos = start_x + 20
y_pos++
drawCommandsAtPoint(commands1[:], x_pos, y_pos+1, style)
drawCommandsAtPoint(commands2[:], x_pos+20, y_pos+1, style)
exit_txt := "Press any key to return to browser"
termbox_util.DrawStringAtPoint(exit_txt, (width-len(exit_txt))/2, height-1, style.title_fg, style.title_bg)
}

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screen_browser.go Normal file
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package main
import (
"fmt"
"github.com/br0xen/termbox-util"
"github.com/nsf/termbox-go"
"strings"
"time"
)
type ViewPort struct {
bytes_per_row int
number_of_rows int
first_row int
}
type BrowserScreen struct {
db *BoltDB
view_port ViewPort
queued_command string
current_path []string
current_type int
message string
mode BrowserMode
input_modal *termbox_util.InputModal
confirm_modal *termbox_util.ConfirmModal
message_timeout time.Duration
message_time time.Time
}
type BrowserMode int
const (
MODE_BROWSE = 16 // 0000 0001 0000
MODE_CHANGE = 32 // 0000 0010 0000
MODE_CHANGE_KEY = 33 // 0000 0010 0001
MODE_CHANGE_VAL = 34 // 0000 0010 0010
MODE_INSERT = 64 // 0000 0100 0000
MODE_INSERT_BUCKET = 65 // 0000 0100 0001
MODE_INSERT_PAIR = 68 // 0000 0100 0100
MODE_INSERT_PAIR_KEY = 69 // 0000 0100 0101
MODE_INSERT_PAIR_VAL = 70 // 0000 0100 0110
MODE_DELETE = 256 // 0001 0000 0000
MODE_MOD_TO_PARENT = 8 // 0000 0000 1000
)
type BoltType int
const (
TYPE_BUCKET = iota
TYPE_PAIR
)
func (screen *BrowserScreen) handleKeyEvent(event termbox.Event) int {
if screen.mode == 0 {
screen.mode = MODE_BROWSE
}
if screen.mode == MODE_BROWSE {
return screen.handleBrowseKeyEvent(event)
} else if screen.mode&MODE_CHANGE == MODE_CHANGE {
return screen.handleInputKeyEvent(event)
} else if screen.mode&MODE_INSERT == MODE_INSERT {
return screen.handleInsertKeyEvent(event)
} else if screen.mode == MODE_DELETE {
return screen.handleDeleteKeyEvent(event)
}
return BROWSER_SCREEN_INDEX
}
func (screen *BrowserScreen) handleBrowseKeyEvent(event termbox.Event) int {
if event.Ch == '?' {
// About
return ABOUT_SCREEN_INDEX
} else if event.Ch == 'q' || event.Key == termbox.KeyEsc || event.Key == termbox.KeyCtrlC {
// Quit
return EXIT_SCREEN_INDEX
} else if event.Ch == 'g' {
// Jump to Beginning
screen.current_path = screen.db.getNextVisiblePath(nil)
} else if event.Ch == 'G' {
// Jump to End
screen.current_path = screen.db.getPrevVisiblePath(nil)
} else if event.Key == termbox.KeyCtrlR {
screen.refreshDatabase()
} else if event.Key == termbox.KeyCtrlF {
// Jump forward half a screen
_, h := termbox.Size()
half := h / 2
screen.jumpCursorDown(half)
} else if event.Key == termbox.KeyCtrlB {
_, h := termbox.Size()
half := h / 2
screen.jumpCursorUp(half)
} else if event.Ch == 'j' || event.Key == termbox.KeyArrowDown {
screen.moveCursorDown()
} else if event.Ch == 'k' || event.Key == termbox.KeyArrowUp {
screen.moveCursorUp()
} else if event.Ch == 'p' {
// p creates a new pair at the current level
screen.startInsertItem(TYPE_PAIR)
} else if event.Ch == 'P' {
// P creates a new pair at the parent level
screen.startInsertItemAtParent(TYPE_PAIR)
} else if event.Ch == 'b' {
// b creates a new bucket at the current level
screen.startInsertItem(TYPE_BUCKET)
} else if event.Ch == 'B' {
// B creates a new bucket at the parent level
screen.startInsertItemAtParent(TYPE_BUCKET)
} else if event.Ch == 'e' {
b, p, _ := screen.db.getGenericFromPath(screen.current_path)
if b != nil {
screen.setMessage("Cannot edit a bucket, did you mean to (r)ename?")
} else if p != nil {
screen.startEditItem()
}
} else if event.Ch == 'r' {
screen.startRenameItem()
} else if event.Key == termbox.KeyEnter {
b, p, _ := screen.db.getGenericFromPath(screen.current_path)
if b != nil {
screen.db.toggleOpenBucket(screen.current_path)
} else if p != nil {
screen.startEditItem()
}
} else if event.Ch == 'l' || event.Key == termbox.KeyArrowRight {
b, p, _ := screen.db.getGenericFromPath(screen.current_path)
// Select the current item
if b != nil {
screen.db.toggleOpenBucket(screen.current_path)
} else if p != nil {
screen.startEditItem()
} else {
screen.setMessage("Not sure what to do here...")
}
} else if event.Ch == 'h' || event.Key == termbox.KeyArrowLeft {
// If we are _on_ a bucket that's open, close it
b, _, e := screen.db.getGenericFromPath(screen.current_path)
if e == nil && b != nil && b.expanded {
screen.db.closeBucket(screen.current_path)
} else {
if len(screen.current_path) > 1 {
parent_bucket, err := screen.db.getBucketFromPath(screen.current_path[:len(screen.current_path)-1])
if err == nil {
screen.db.closeBucket(parent_bucket.GetPath())
// Figure out how far up we need to move the cursor
screen.current_path = parent_bucket.GetPath()
}
} else {
screen.db.closeBucket(screen.current_path)
}
}
} else if event.Ch == 'D' {
screen.startDeleteItem()
}
return BROWSER_SCREEN_INDEX
}
func (screen *BrowserScreen) handleInputKeyEvent(event termbox.Event) int {
if event.Key == termbox.KeyEsc {
screen.mode = MODE_BROWSE
screen.input_modal.Clear()
} else {
screen.input_modal.HandleKeyPress(event)
if screen.input_modal.IsDone() {
b, p, _ := screen.db.getGenericFromPath(screen.current_path)
if b != nil {
if screen.mode == MODE_CHANGE_KEY {
new_name := screen.input_modal.GetValue()
if renameBucket(screen.current_path, new_name) != nil {
screen.setMessage("Error renaming bucket.")
} else {
b.name = new_name
screen.current_path[len(screen.current_path)-1] = b.name
screen.setMessage("Bucket Renamed!")
screen.refreshDatabase()
}
}
} else if p != nil {
if screen.mode == MODE_CHANGE_KEY {
new_key := screen.input_modal.GetValue()
if updatePairKey(screen.current_path, new_key) != nil {
screen.setMessage("Error occurred updating Pair.")
} else {
p.key = new_key
screen.current_path[len(screen.current_path)-1] = p.key
screen.setMessage("Pair updated!")
screen.refreshDatabase()
}
} else if screen.mode == MODE_CHANGE_VAL {
new_val := screen.input_modal.GetValue()
if updatePairValue(screen.current_path, new_val) != nil {
screen.setMessage("Error occurred updating Pair.")
} else {
p.val = new_val
screen.setMessage("Pair updated!")
screen.refreshDatabase()
}
}
}
screen.mode = MODE_BROWSE
screen.input_modal.Clear()
}
}
return BROWSER_SCREEN_INDEX
}
func (screen *BrowserScreen) handleDeleteKeyEvent(event termbox.Event) int {
screen.confirm_modal.HandleKeyPress(event)
if screen.confirm_modal.IsDone() {
if screen.confirm_modal.IsAccepted() {
hold_next_path := screen.db.getNextVisiblePath(screen.current_path)
hold_prev_path := screen.db.getPrevVisiblePath(screen.current_path)
if deleteKey(screen.current_path) == nil {
screen.refreshDatabase()
// Move the current path endpoint appropriately
//found_new_path := false
if hold_next_path != nil {
if len(hold_next_path) > 2 {
if hold_next_path[len(hold_next_path)-2] == screen.current_path[len(screen.current_path)-2] {
screen.current_path = hold_next_path
} else if hold_prev_path != nil {
screen.current_path = hold_prev_path
} else {
// Otherwise, go to the parent
screen.current_path = screen.current_path[:(len(hold_next_path) - 2)]
}
} else {
// Root bucket deleted, set to next
screen.current_path = hold_next_path
}
} else if hold_prev_path != nil {
screen.current_path = hold_prev_path
} else {
screen.current_path = screen.current_path[:0]
}
}
}
screen.mode = MODE_BROWSE
screen.confirm_modal.Clear()
}
return BROWSER_SCREEN_INDEX
}
func (screen *BrowserScreen) handleInsertKeyEvent(event termbox.Event) int {
if event.Key == termbox.KeyEsc {
if len(screen.db.buckets) == 0 {
return EXIT_SCREEN_INDEX
} else {
screen.mode = MODE_BROWSE
screen.input_modal.Clear()
}
} else {
screen.input_modal.HandleKeyPress(event)
if screen.input_modal.IsDone() {
new_val := screen.input_modal.GetValue()
screen.input_modal.Clear()
var insert_path []string
if len(screen.current_path) > 0 {
_, p, e := screen.db.getGenericFromPath(screen.current_path)
if e != nil {
screen.setMessage("Error Inserting new item. Invalid Path.")
}
insert_path = screen.current_path
// where are we inserting?
if p != nil {
// If we're sitting on a pair, we have to go to it's parent
screen.mode = screen.mode | MODE_MOD_TO_PARENT
}
if screen.mode&MODE_MOD_TO_PARENT == MODE_MOD_TO_PARENT {
if len(screen.current_path) > 1 {
insert_path = screen.current_path[:len(screen.current_path)-1]
} else {
insert_path = make([]string, 0)
}
}
}
parent_b, _, _ := screen.db.getGenericFromPath(insert_path)
if screen.mode&MODE_INSERT_BUCKET == MODE_INSERT_BUCKET {
err := insertBucket(insert_path, new_val)
if err != nil {
screen.setMessage(fmt.Sprintf("%s => %s", err, insert_path))
} else {
if parent_b != nil {
parent_b.expanded = true
}
}
screen.current_path = append(insert_path, new_val)
screen.refreshDatabase()
screen.mode = MODE_BROWSE
screen.input_modal.Clear()
} else if screen.mode&MODE_INSERT_PAIR == MODE_INSERT_PAIR {
err := insertPair(insert_path, new_val, "")
if err != nil {
screen.setMessage(fmt.Sprintf("%s => %s", err, insert_path))
screen.refreshDatabase()
screen.mode = MODE_BROWSE
screen.input_modal.Clear()
} else {
if parent_b != nil {
parent_b.expanded = true
}
screen.current_path = append(insert_path, new_val)
screen.refreshDatabase()
screen.startEditItem()
}
}
}
}
return BROWSER_SCREEN_INDEX
}
func (screen *BrowserScreen) jumpCursorUp(distance int) bool {
// Jump up 'distance' lines
vis_paths, err := screen.db.buildVisiblePathSlice()
if err == nil {
find_path := strings.Join(screen.current_path, "/")
start_jump := false
for i := range vis_paths {
if vis_paths[len(vis_paths)-1-i] == find_path {
start_jump = true
}
if start_jump {
distance -= 1
if distance == 0 {
screen.current_path = strings.Split(vis_paths[len(vis_paths)-1-i], "/")
break
}
}
}
if strings.Join(screen.current_path, "/") == find_path {
screen.current_path = screen.db.getNextVisiblePath(nil)
}
}
return true
}
func (screen *BrowserScreen) jumpCursorDown(distance int) bool {
vis_paths, err := screen.db.buildVisiblePathSlice()
if err == nil {
find_path := strings.Join(screen.current_path, "/")
start_jump := false
for i := range vis_paths {
if vis_paths[i] == find_path {
start_jump = true
}
if start_jump {
distance -= 1
if distance == 0 {
screen.current_path = strings.Split(vis_paths[i], "/")
break
}
}
}
if strings.Join(screen.current_path, "/") == find_path {
screen.current_path = screen.db.getPrevVisiblePath(nil)
}
}
return true
}
func (screen *BrowserScreen) moveCursorUp() bool {
new_path := screen.db.getPrevVisiblePath(screen.current_path)
if new_path != nil {
screen.current_path = new_path
return true
}
return false
}
func (screen *BrowserScreen) moveCursorDown() bool {
new_path := screen.db.getNextVisiblePath(screen.current_path)
if new_path != nil {
screen.current_path = new_path
return true
}
return false
}
func (screen *BrowserScreen) performLayout() {}
func (screen *BrowserScreen) drawScreen(style Style) {
if len(screen.db.buckets) == 0 && screen.mode&MODE_INSERT_BUCKET != MODE_INSERT_BUCKET {
// Force a bucket insert
screen.startInsertItemAtParent(TYPE_BUCKET)
}
if screen.message == "" {
screen.setMessageWithTimeout("Press '?' for help", -1)
}
screen.drawLeftPane(style)
screen.drawRightPane(style)
screen.drawHeader(style)
screen.drawFooter(style)
if screen.input_modal != nil {
screen.input_modal.Draw()
}
if screen.mode == MODE_DELETE {
screen.confirm_modal.Draw()
}
}
func (screen *BrowserScreen) drawHeader(style Style) {
width, _ := termbox.Size()
spaces := strings.Repeat(" ", (width / 2))
termbox_util.DrawStringAtPoint(fmt.Sprintf("%s%s%s", spaces, PROGRAM_NAME, spaces), 0, 0, style.title_fg, style.title_bg)
}
func (screen *BrowserScreen) drawFooter(style Style) {
if screen.message_timeout > 0 && time.Since(screen.message_time) > screen.message_timeout {
screen.clearMessage()
}
_, height := termbox.Size()
termbox_util.DrawStringAtPoint(screen.message, 0, height-1, style.default_fg, style.default_bg)
}
func (screen *BrowserScreen) drawLeftPane(style Style) {
w, h := termbox.Size()
if w > 80 {
w = w / 2
}
screen.view_port.number_of_rows = h - 2
termbox_util.FillWithChar('=', 0, 1, w, 1, style.default_fg, style.default_bg)
y := 2
screen.view_port.first_row = y
if len(screen.current_path) == 0 {
screen.current_path = screen.db.getNextVisiblePath(nil)
}
// So we know how much of the tree _wants_ to be visible
// we only have screen.view_port.number_of_rows of space though
cur_path_spot := 0
vis_slice, err := screen.db.buildVisiblePathSlice()
if err == nil {
for i := range vis_slice {
if strings.Join(screen.current_path, "/") == vis_slice[i] {
cur_path_spot = i
}
}
}
tree_offset := 0
max_cursor := screen.view_port.number_of_rows * 2 / 3
if cur_path_spot > max_cursor {
tree_offset = cur_path_spot - max_cursor
}
for i := range screen.db.buckets {
// The drawBucket function returns how many lines it took up
bkt_h := screen.drawBucket(&screen.db.buckets[i], style, (y - tree_offset))
y += bkt_h
}
}
func (screen *BrowserScreen) drawRightPane(style Style) {
w, h := termbox.Size()
if w > 80 {
// Screen is wide enough, split it
termbox_util.FillWithChar('=', 0, 1, w, 1, style.default_fg, style.default_bg)
termbox_util.FillWithChar('|', (w / 2), screen.view_port.first_row-1, (w / 2), h, style.default_fg, style.default_bg)
b, p, err := screen.db.getGenericFromPath(screen.current_path)
if err == nil {
start_x := (w / 2) + 2
start_y := 2
if b != nil {
termbox_util.DrawStringAtPoint(fmt.Sprintf("Path: %s", strings.Join(b.GetPath(), "/")), start_x, start_y, style.default_fg, style.default_bg)
termbox_util.DrawStringAtPoint(fmt.Sprintf("Buckets: %d", len(b.buckets)), start_x, start_y+1, style.default_fg, style.default_bg)
termbox_util.DrawStringAtPoint(fmt.Sprintf("Pairs: %d", len(b.pairs)), start_x, start_y+2, style.default_fg, style.default_bg)
} else if p != nil {
termbox_util.DrawStringAtPoint(fmt.Sprintf("Path: %s", strings.Join(p.GetPath(), "/")), start_x, start_y, style.default_fg, style.default_bg)
termbox_util.DrawStringAtPoint(fmt.Sprintf("Key: %s", p.key), start_x, start_y+1, style.default_fg, style.default_bg)
termbox_util.DrawStringAtPoint(fmt.Sprintf("Value: %s", p.val), start_x, start_y+2, style.default_fg, style.default_bg)
}
}
}
}
/* drawBucket
* @bkt *BoltBucket - The bucket to draw
* @style Style - The style to use
* @w int - The Width of the lines
* @y int - The Y position to start drawing
* return - The number of lines used
*/
func (screen *BrowserScreen) drawBucket(bkt *BoltBucket, style Style, y int) int {
w, _ := termbox.Size()
if w > 80 {
w = w / 2
}
used_lines := 0
bucket_fg := style.default_fg
bucket_bg := style.default_bg
if comparePaths(screen.current_path, bkt.GetPath()) {
bucket_fg = style.cursor_fg
bucket_bg = style.cursor_bg
}
bkt_string := strings.Repeat(" ", len(bkt.GetPath())*2) //screen.db.getDepthFromPath(bkt.GetPath())*2)
if bkt.expanded {
bkt_string = bkt_string + "- " + bkt.name + " "
bkt_string = fmt.Sprintf("%s%s", bkt_string, strings.Repeat(" ", (w-len(bkt_string))))
termbox_util.DrawStringAtPoint(bkt_string, 0, (y + used_lines), bucket_fg, bucket_bg)
used_lines += 1
for i := range bkt.buckets {
used_lines += screen.drawBucket(&bkt.buckets[i], style, y+used_lines)
}
for i := range bkt.pairs {
used_lines += screen.drawPair(&bkt.pairs[i], style, y+used_lines)
}
} else {
bkt_string = bkt_string + "+ " + bkt.name
bkt_string = fmt.Sprintf("%s%s", bkt_string, strings.Repeat(" ", (w-len(bkt_string))))
termbox_util.DrawStringAtPoint(bkt_string, 0, (y + used_lines), bucket_fg, bucket_bg)
used_lines += 1
}
return used_lines
}
func (screen *BrowserScreen) drawPair(bp *BoltPair, style Style, y int) int {
w, _ := termbox.Size()
if w > 80 {
w = w / 2
}
bucket_fg := style.default_fg
bucket_bg := style.default_bg
if comparePaths(screen.current_path, bp.GetPath()) {
bucket_fg = style.cursor_fg
bucket_bg = style.cursor_bg
}
pair_string := strings.Repeat(" ", len(bp.GetPath())*2) //screen.db.getDepthFromPath(bp.GetPath())*2)
pair_string = fmt.Sprintf("%s%s: %s", pair_string, bp.key, bp.val)
if w-len(pair_string) > 0 {
pair_string = fmt.Sprintf("%s%s", pair_string, strings.Repeat(" ", (w-len(pair_string))))
}
termbox_util.DrawStringAtPoint(pair_string, 0, y, bucket_fg, bucket_bg)
return 1
}
func (screen *BrowserScreen) startDeleteItem() bool {
b, p, e := screen.db.getGenericFromPath(screen.current_path)
if e == nil {
w, h := termbox.Size()
inp_w, inp_h := (w / 2), 6
inp_x, inp_y := ((w / 2) - (inp_w / 2)), ((h / 2) - inp_h)
mod := termbox_util.CreateConfirmModal("", inp_x, inp_y, inp_w, inp_h, termbox.ColorWhite, termbox.ColorBlack)
if b != nil {
mod.SetTitle(termbox_util.AlignText(fmt.Sprintf("Delete Bucket '%s'?", b.name), inp_w-1, termbox_util.ALIGN_CENTER))
} else if p != nil {
mod.SetTitle(termbox_util.AlignText(fmt.Sprintf("Delete Pair '%s'?", p.key), inp_w-1, termbox_util.ALIGN_CENTER))
}
mod.Show()
mod.SetText(termbox_util.AlignText("This cannot be undone!", inp_w-1, termbox_util.ALIGN_CENTER))
screen.confirm_modal = mod
screen.mode = MODE_DELETE
return true
}
return false
}
func (screen *BrowserScreen) startEditItem() bool {
_, p, e := screen.db.getGenericFromPath(screen.current_path)
if e == nil {
w, h := termbox.Size()
inp_w, inp_h := (w / 2), 6
inp_x, inp_y := ((w / 2) - (inp_w / 2)), ((h / 2) - inp_h)
mod := termbox_util.CreateInputModal("", inp_x, inp_y, inp_w, inp_h, termbox.ColorWhite, termbox.ColorBlack)
if p != nil {
mod.SetTitle(termbox_util.AlignText(fmt.Sprintf("Input new value for '%s'", p.key), inp_w, termbox_util.ALIGN_CENTER))
mod.SetValue(p.val)
}
mod.Show()
screen.input_modal = mod
screen.mode = MODE_CHANGE_VAL
return true
}
return false
}
func (screen *BrowserScreen) startRenameItem() bool {
b, p, e := screen.db.getGenericFromPath(screen.current_path)
if e == nil {
w, h := termbox.Size()
inp_w, inp_h := (w / 2), 6
inp_x, inp_y := ((w / 2) - (inp_w / 2)), ((h / 2) - inp_h)
mod := termbox_util.CreateInputModal("", inp_x, inp_y, inp_w, inp_h, termbox.ColorWhite, termbox.ColorBlack)
if b != nil {
mod.SetTitle(termbox_util.AlignText(fmt.Sprintf("Rename Bucket '%s' to:", b.name), inp_w, termbox_util.ALIGN_CENTER))
mod.SetValue(b.name)
} else if p != nil {
mod.SetTitle(termbox_util.AlignText(fmt.Sprintf("Rename Key '%s' to:", p.key), inp_w, termbox_util.ALIGN_CENTER))
mod.SetValue(p.key)
}
mod.Show()
screen.input_modal = mod
screen.mode = MODE_CHANGE_KEY
return true
}
return false
}
func (screen *BrowserScreen) startInsertItemAtParent(tp BoltType) bool {
w, h := termbox.Size()
inp_w, inp_h := w-1, 7
if w > 80 {
inp_w, inp_h = (w / 2), 7
}
inp_x, inp_y := ((w / 2) - (inp_w / 2)), ((h / 2) - inp_h)
mod := termbox_util.CreateInputModal("", inp_x, inp_y, inp_w, inp_h, termbox.ColorWhite, termbox.ColorBlack)
screen.input_modal = mod
if len(screen.current_path) <= 0 {
// in the root directory
if tp == TYPE_BUCKET {
mod.SetTitle(termbox_util.AlignText("Create Root Bucket", inp_w, termbox_util.ALIGN_CENTER))
screen.mode = MODE_INSERT_BUCKET | MODE_MOD_TO_PARENT
mod.Show()
return true
}
} else {
var ins_path string
_, p, e := screen.db.getGenericFromPath(screen.current_path[:len(screen.current_path)-1])
if e == nil && p != nil {
ins_path = strings.Join(screen.current_path[:len(screen.current_path)-2], "/") + "/"
} else {
ins_path = strings.Join(screen.current_path[:len(screen.current_path)-1], "/") + "/"
}
title_prfx := ""
if tp == TYPE_BUCKET {
title_prfx = "New Bucket: "
} else if tp == TYPE_PAIR {
title_prfx = "New Pair: "
}
title_text := title_prfx + ins_path
if len(title_text) > inp_w {
trunc_w := len(title_text) - inp_w
title_text = title_prfx + "..." + ins_path[trunc_w+3:]
}
if tp == TYPE_BUCKET {
mod.SetTitle(termbox_util.AlignText(title_text, inp_w, termbox_util.ALIGN_CENTER))
screen.mode = MODE_INSERT_BUCKET | MODE_MOD_TO_PARENT
mod.Show()
return true
} else if tp == TYPE_PAIR {
mod.SetTitle(termbox_util.AlignText(title_text, inp_w, termbox_util.ALIGN_CENTER))
mod.Show()
screen.mode = MODE_INSERT_PAIR | MODE_MOD_TO_PARENT
return true
}
}
return false
}
func (screen *BrowserScreen) startInsertItem(tp BoltType) bool {
w, h := termbox.Size()
inp_w, inp_h := w-1, 7
if w > 80 {
inp_w, inp_h = (w / 2), 7
}
inp_x, inp_y := ((w / 2) - (inp_w / 2)), ((h / 2) - inp_h)
mod := termbox_util.CreateInputModal("", inp_x, inp_y, inp_w, inp_h, termbox.ColorWhite, termbox.ColorBlack)
screen.input_modal = mod
var ins_path string
_, p, e := screen.db.getGenericFromPath(screen.current_path)
if e == nil && p != nil {
ins_path = strings.Join(screen.current_path[:len(screen.current_path)-1], "/") + "/"
} else {
ins_path = strings.Join(screen.current_path, "/") + "/"
}
title_prfx := ""
if tp == TYPE_BUCKET {
title_prfx = "New Bucket: "
} else if tp == TYPE_PAIR {
title_prfx = "New Pair: "
}
title_text := title_prfx + ins_path
if len(title_text) > inp_w {
trunc_w := len(title_text) - inp_w
title_text = title_prfx + "..." + ins_path[trunc_w+3:]
}
if tp == TYPE_BUCKET {
mod.SetTitle(termbox_util.AlignText(title_text, inp_w, termbox_util.ALIGN_CENTER))
screen.mode = MODE_INSERT_BUCKET
mod.Show()
return true
} else if tp == TYPE_PAIR {
mod.SetTitle(termbox_util.AlignText(title_text, inp_w, termbox_util.ALIGN_CENTER))
mod.Show()
screen.mode = MODE_INSERT_PAIR
return true
}
return false
}
func (screen *BrowserScreen) setMessage(msg string) {
screen.message = msg
screen.message_time = time.Now()
screen.message_timeout = time.Second * 2
}
/* setMessageWithTimeout lets you specify the timeout for the message
* setting it to -1 means it won't timeout
*/
func (screen *BrowserScreen) setMessageWithTimeout(msg string, timeout time.Duration) {
screen.message = msg
screen.message_time = time.Now()
screen.message_timeout = timeout
}
func (screen *BrowserScreen) clearMessage() {
screen.message = ""
screen.message_timeout = -1
}
func (screen *BrowserScreen) refreshDatabase() {
shadowDB := screen.db
screen.db = screen.db.refreshDatabase()
screen.db.syncOpenBuckets(shadowDB)
}
func comparePaths(p1, p2 []string) bool {
return strings.Join(p1, "/") == strings.Join(p2, "/")
}

24
style.go Normal file
View File

@ -0,0 +1,24 @@
package main
import "github.com/nsf/termbox-go"
type Style struct {
default_bg termbox.Attribute
default_fg termbox.Attribute
title_fg termbox.Attribute
title_bg termbox.Attribute
cursor_fg termbox.Attribute
cursor_bg termbox.Attribute
}
func defaultStyle() Style {
var style Style
style.default_bg = termbox.ColorBlack
style.default_fg = termbox.ColorWhite
style.title_fg = termbox.ColorBlack
style.title_bg = termbox.ColorGreen
style.cursor_fg = termbox.ColorBlack
style.cursor_bg = termbox.ColorGreen
return style
}