600 lines
18 KiB
Go
600 lines
18 KiB
Go
package main
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import (
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"fmt"
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"github.com/nsf/termbox-go"
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"gogs.bullercodeworks.com/brian/termbox-util"
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"strings"
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)
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type ViewPort struct {
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bytes_per_row int
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number_of_rows int
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first_row int
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}
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type BrowserScreen struct {
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db *BoltDB
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cursor Cursor
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view_port ViewPort
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queued_command string
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current_path []string
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current_type int
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message string
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mode BrowserMode
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input_modal *termbox_util.InputModal
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confirm_modal *termbox_util.ConfirmModal
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}
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type BrowserMode int
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const (
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MODE_BROWSE = 16 // 0001 0000
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MODE_CHANGE_VAL = 32 // 0010 0000
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MODE_INSERT_BUCKET = 48 // 0011 0000
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MODE_INSERT_PAIR = 64 // 0100 0000
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MODE_INSERT_PAIR_KEY = 65 // 0100 0001
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MODE_INSERT_PAIR_VAL = 66 // 0100 0010
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MODE_DELETE = 128 // 1000 0000
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MODE_MOD_TO_PARENT = 8 // 0000 1000
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)
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type BoltType int
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const (
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TYPE_BUCKET = iota
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TYPE_PAIR
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)
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func (screen *BrowserScreen) handleKeyEvent(event termbox.Event) int {
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if screen.mode == 0 {
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screen.mode = MODE_BROWSE
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}
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if screen.mode == MODE_BROWSE {
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return screen.handleBrowseKeyEvent(event)
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} else if screen.mode == MODE_CHANGE_VAL {
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return screen.handleInputKeyEvent(event)
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} else if screen.mode&MODE_INSERT_BUCKET == MODE_INSERT_BUCKET || screen.mode&MODE_INSERT_PAIR == MODE_INSERT_PAIR {
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return screen.handleInsertKeyEvent(event)
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} else if screen.mode == MODE_DELETE {
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return screen.handleDeleteKeyEvent(event)
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}
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return BROWSER_SCREEN_INDEX
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}
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func (screen *BrowserScreen) handleBrowseKeyEvent(event termbox.Event) int {
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if event.Ch == '?' {
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// About
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return ABOUT_SCREEN_INDEX
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} else if event.Ch == 'q' || event.Key == termbox.KeyEsc || event.Key == termbox.KeyCtrlC {
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// Quit
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return EXIT_SCREEN_INDEX
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} else if event.Ch == 'g' {
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// Jump to Beginning
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screen.current_path = screen.db.getNextVisiblePath(nil)
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} else if event.Ch == 'G' {
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// Jump to End
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screen.current_path = screen.db.getPrevVisiblePath(nil)
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} else if event.Key == termbox.KeyCtrlF {
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// Jump forward half a screen
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_, h := termbox.Size()
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half := h / 2
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screen.jumpCursorDown(half)
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} else if event.Key == termbox.KeyCtrlB {
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_, h := termbox.Size()
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half := h / 2
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screen.jumpCursorUp(half)
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} else if event.Ch == 'j' || event.Key == termbox.KeyArrowDown {
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screen.moveCursorDown()
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} else if event.Ch == 'k' || event.Key == termbox.KeyArrowUp {
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screen.moveCursorUp()
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} else if event.Ch == 'p' {
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// p creates a new pair at the current level
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screen.startInsertItem(TYPE_PAIR)
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} else if event.Ch == 'P' {
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// P creates a new pair at the parent level
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screen.startInsertItemAtParent(TYPE_PAIR)
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} else if event.Ch == 'b' {
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// b creates a new bucket at the current level
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screen.startInsertItem(TYPE_BUCKET)
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} else if event.Ch == 'B' {
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// B creates a new bucket at the parent level
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screen.startInsertItemAtParent(TYPE_BUCKET)
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} else if event.Ch == 'e' {
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b, p, _ := screen.db.getGenericFromPath(screen.current_path)
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if b != nil {
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screen.message = "Cannot edit a bucket yet"
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} else if p != nil {
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screen.startEditItem()
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}
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} else if event.Key == termbox.KeyEnter {
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b, p, _ := screen.db.getGenericFromPath(screen.current_path)
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if b != nil {
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screen.db.toggleOpenBucket(screen.current_path)
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} else if p != nil {
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screen.startEditItem()
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}
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} else if event.Ch == 'l' || event.Key == termbox.KeyArrowRight {
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b, p, _ := screen.db.getGenericFromPath(screen.current_path)
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// Select the current item
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if b != nil {
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screen.db.toggleOpenBucket(screen.current_path)
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} else if p != nil {
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screen.startEditItem()
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} else {
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screen.message = "Not sure what to do here..."
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}
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} else if event.Ch == 'h' || event.Key == termbox.KeyArrowLeft {
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// If we are _on_ a bucket that's open, close it
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b, _, e := screen.db.getGenericFromPath(screen.current_path)
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if e == nil && b != nil && b.expanded {
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screen.db.closeBucket(screen.current_path)
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} else {
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if len(screen.current_path) > 1 {
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parent_bucket, err := screen.db.getBucketFromPath(screen.current_path[:len(screen.current_path)-1])
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if err == nil {
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screen.db.closeBucket(parent_bucket.path)
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// Figure out how far up we need to move the cursor
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screen.current_path = parent_bucket.path
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}
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} else {
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screen.db.closeBucket(screen.current_path)
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}
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}
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} else if event.Ch == 'D' {
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screen.startDeleteItem()
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}
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return BROWSER_SCREEN_INDEX
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}
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func (screen *BrowserScreen) handleInputKeyEvent(event termbox.Event) int {
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if event.Key == termbox.KeyEsc {
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screen.mode = MODE_BROWSE
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screen.input_modal.Clear()
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} else {
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screen.input_modal.HandleKeyPress(event)
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if screen.input_modal.IsDone() {
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new_val := screen.input_modal.GetValue()
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_, p, _ := screen.db.getGenericFromPath(screen.current_path)
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if p != nil {
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if updatePairValue(screen.current_path, new_val) != nil {
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screen.message = "Error occurred updating Pair."
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} else {
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p.val = new_val
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screen.message = "Pair updated!"
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}
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}
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screen.mode = MODE_BROWSE
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screen.input_modal.Clear()
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}
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}
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return BROWSER_SCREEN_INDEX
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}
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func (screen *BrowserScreen) handleDeleteKeyEvent(event termbox.Event) int {
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screen.confirm_modal.HandleKeyPress(event)
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if screen.confirm_modal.IsDone() {
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if screen.confirm_modal.IsAccepted() {
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hold_next_path := screen.db.getNextVisiblePath(screen.current_path)
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hold_prev_path := screen.db.getPrevVisiblePath(screen.current_path)
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if deleteKey(screen.current_path) == nil {
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shadow_db := screen.db
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screen.db = refreshDatabase()
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screen.db.syncOpenBuckets(shadow_db)
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// Move the current path endpoint appropriately
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//found_new_path := false
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if hold_next_path != nil {
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if len(hold_next_path) > 2 {
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if hold_next_path[len(hold_next_path)-2] == screen.current_path[len(screen.current_path)-2] {
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screen.current_path = hold_next_path
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} else if hold_prev_path != nil {
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screen.current_path = hold_prev_path
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} else {
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// Otherwise, go to the parent
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screen.current_path = screen.current_path[:(len(hold_next_path) - 2)]
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}
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} else {
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// Root bucket deleted, set to next
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screen.current_path = hold_next_path
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}
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} else if hold_prev_path != nil {
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screen.current_path = hold_prev_path
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} else {
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screen.current_path = screen.current_path[:0]
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}
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}
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}
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screen.mode = MODE_BROWSE
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screen.confirm_modal.Clear()
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}
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return BROWSER_SCREEN_INDEX
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}
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func (screen *BrowserScreen) handleInsertKeyEvent(event termbox.Event) int {
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if event.Key == termbox.KeyEsc {
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screen.mode = MODE_BROWSE
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screen.input_modal.Clear()
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} else {
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screen.input_modal.HandleKeyPress(event)
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if screen.input_modal.IsDone() {
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new_val := screen.input_modal.GetValue()
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b, p, e := screen.db.getGenericFromPath(screen.current_path)
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if e != nil {
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screen.message = "Error Inserting new item. Invalid Path."
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}
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insert_path := screen.current_path
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// where are we inserting?
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var parent *BoltBucket
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if p != nil {
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// If we're sitting on a pair, we have to go to it's parent
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screen.mode = screen.mode | MODE_MOD_TO_PARENT
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parent = p.parent
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} else if b != nil {
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parent = b.parent
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insert_path = b.path
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}
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if screen.mode&MODE_MOD_TO_PARENT == MODE_MOD_TO_PARENT {
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if parent != nil {
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insert_path = parent.path
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} else {
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insert_path = screen.current_path[:0]
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}
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}
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if screen.mode&MODE_INSERT_BUCKET == MODE_INSERT_BUCKET {
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insertBucket(insert_path, new_val)
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screen.mode = MODE_BROWSE
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screen.input_modal.Clear()
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} else if screen.mode&MODE_INSERT_PAIR == MODE_INSERT_PAIR {
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// insertPair(insert_path,
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if screen.mode&MODE_INSERT_PAIR_KEY == MODE_INSERT_PAIR_KEY {
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screen.input_modal.SetText("New Pair Value:")
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screen.mode = MODE_INSERT_PAIR | MODE_INSERT_PAIR_VAL
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} else if screen.mode&MODE_INSERT_PAIR_VAL == MODE_INSERT_PAIR_VAL {
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screen.mode = MODE_BROWSE
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screen.input_modal.Clear()
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}
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}
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}
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}
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return BROWSER_SCREEN_INDEX
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}
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func (screen *BrowserScreen) jumpCursorUp(distance int) bool {
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// Jump up 'distance' lines
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vis_paths, err := screen.db.buildVisiblePathSlice(nil)
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if err == nil {
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find_path := strings.Join(screen.current_path, "/")
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start_jump := false
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for i := range vis_paths {
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if vis_paths[len(vis_paths)-1-i] == find_path {
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start_jump = true
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}
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if start_jump {
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distance -= 1
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if distance == 0 {
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screen.current_path = strings.Split(vis_paths[len(vis_paths)-1-i], "/")
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break
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}
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}
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}
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if strings.Join(screen.current_path, "/") == find_path {
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screen.current_path = screen.db.getNextVisiblePath(nil)
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}
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}
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return true
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}
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func (screen *BrowserScreen) jumpCursorDown(distance int) bool {
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vis_paths, err := screen.db.buildVisiblePathSlice(nil)
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if err == nil {
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find_path := strings.Join(screen.current_path, "/")
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start_jump := false
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for i := range vis_paths {
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if vis_paths[i] == find_path {
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start_jump = true
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}
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if start_jump {
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distance -= 1
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if distance == 0 {
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screen.current_path = strings.Split(vis_paths[i], "/")
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break
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}
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}
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}
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if strings.Join(screen.current_path, "/") == find_path {
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screen.current_path = screen.db.getPrevVisiblePath(nil)
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}
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}
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return true
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}
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func (screen *BrowserScreen) moveCursorUp() bool {
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new_path := screen.db.getPrevVisiblePath(screen.current_path)
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if new_path != nil {
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screen.current_path = new_path
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return true
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}
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return false
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}
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func (screen *BrowserScreen) moveCursorDown() bool {
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new_path := screen.db.getNextVisiblePath(screen.current_path)
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if new_path != nil {
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screen.current_path = new_path
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return true
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}
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return false
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}
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func (screen *BrowserScreen) performLayout() {}
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func (screen *BrowserScreen) drawScreen(style Style) {
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screen.drawLeftPane(style)
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screen.drawRightPane(style)
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screen.drawHeader(style)
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screen.drawFooter(style)
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if screen.mode == MODE_CHANGE_VAL || screen.mode == MODE_INSERT_BUCKET ||
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screen.mode&MODE_INSERT_PAIR == MODE_INSERT_PAIR {
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screen.input_modal.Draw()
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}
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if screen.mode == MODE_DELETE {
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screen.confirm_modal.Draw()
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}
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}
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func (screen *BrowserScreen) drawHeader(style Style) {
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width, _ := termbox.Size()
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spaces := strings.Repeat(" ", (width / 2))
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termbox_util.DrawStringAtPoint(fmt.Sprintf("%s%s%s", spaces, PROGRAM_NAME, spaces), 0, 0, style.title_fg, style.title_bg)
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}
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func (screen *BrowserScreen) drawFooter(style Style) {
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_, height := termbox.Size()
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termbox_util.DrawStringAtPoint(fmt.Sprintf("%s(%d) - %s", screen.current_path, screen.current_type, screen.message), 0, height-1, style.default_fg, style.default_bg)
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}
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func (screen *BrowserScreen) drawLeftPane(style Style) {
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w, h := termbox.Size()
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if w >= 80 {
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w = w / 2
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}
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screen.view_port.number_of_rows = h - 2
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termbox_util.FillWithChar('=', 0, 1, w, 1, style.default_fg, style.default_bg)
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y := 2
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screen.view_port.first_row = y
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if len(screen.current_path) == 0 {
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screen.current_path = screen.db.getNextVisiblePath(nil)
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}
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// So we know how much of the tree _wants_ to be visible
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// we only have screen.view_port.number_of_rows of space though
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cur_path_spot := 0
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vis_slice, err := screen.db.buildVisiblePathSlice(nil)
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if err == nil {
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for i := range vis_slice {
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if strings.Join(screen.current_path, "/") == vis_slice[i] {
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cur_path_spot = i
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}
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}
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}
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tree_offset := 0
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max_cursor := screen.view_port.number_of_rows * 2 / 3
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if cur_path_spot > max_cursor {
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tree_offset = cur_path_spot - max_cursor
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}
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for i := range screen.db.buckets {
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// The drawBucket function returns how many lines it took up
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bkt_h := screen.drawBucket(&screen.db.buckets[i], style, (y - tree_offset))
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y += bkt_h
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}
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}
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func (screen *BrowserScreen) drawRightPane(style Style) {
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w, h := termbox.Size()
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if w >= 80 {
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// Screen is wide enough, split it
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termbox_util.FillWithChar('=', 0, 1, w, 1, style.default_fg, style.default_bg)
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termbox_util.FillWithChar('|', (w / 2), screen.view_port.first_row-1, (w / 2), h, style.default_fg, style.default_bg)
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b, p, err := screen.db.getGenericFromPath(screen.current_path)
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if err == nil {
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start_x := (w / 2) + 2
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start_y := 2
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if b != nil {
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Path: %s", strings.Join(b.path, "/")), start_x, start_y, style.default_fg, style.default_bg)
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Buckets: %d", len(b.buckets)), start_x, start_y+1, style.default_fg, style.default_bg)
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Pairs: %d", len(b.pairs)), start_x, start_y+2, style.default_fg, style.default_bg)
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} else if p != nil {
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Path: %s", strings.Join(p.path, "/")), start_x, start_y, style.default_fg, style.default_bg)
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Key: %s", p.key), start_x, start_y+1, style.default_fg, style.default_bg)
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termbox_util.DrawStringAtPoint(fmt.Sprintf("Value: %s", p.val), start_x, start_y+2, style.default_fg, style.default_bg)
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}
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}
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}
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}
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/* drawBucket
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* @bkt *BoltBucket - The bucket to draw
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* @style Style - The style to use
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* @w int - The Width of the lines
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* @y int - The Y position to start drawing
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* return - The number of lines used
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*/
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func (screen *BrowserScreen) drawBucket(bkt *BoltBucket, style Style, y int) int {
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w, _ := termbox.Size()
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if w >= 80 {
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w = w / 2
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}
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used_lines := 0
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bucket_fg := style.default_fg
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bucket_bg := style.default_bg
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if comparePaths(screen.current_path, bkt.path) {
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bucket_fg = style.cursor_fg
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bucket_bg = style.cursor_bg
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}
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bkt_string := strings.Repeat(" ", screen.db.getDepthFromPath(bkt.path)*2)
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if bkt.expanded {
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bkt_string = bkt_string + "- " + bkt.name + " "
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bkt_string = fmt.Sprintf("%s%s", bkt_string, strings.Repeat(" ", (w-len(bkt_string))))
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termbox_util.DrawStringAtPoint(bkt_string, 0, (y + used_lines), bucket_fg, bucket_bg)
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used_lines += 1
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for i := range bkt.buckets {
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used_lines += screen.drawBucket(&bkt.buckets[i], style, y+used_lines)
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}
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for i := range bkt.pairs {
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used_lines += screen.drawPair(&bkt.pairs[i], style, y+used_lines)
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}
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} else {
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bkt_string = bkt_string + "+ " + bkt.name
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bkt_string = fmt.Sprintf("%s%s", bkt_string, strings.Repeat(" ", (w-len(bkt_string))))
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termbox_util.DrawStringAtPoint(bkt_string, 0, (y + used_lines), bucket_fg, bucket_bg)
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used_lines += 1
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}
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return used_lines
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}
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func (screen *BrowserScreen) drawPair(bp *BoltPair, style Style, y int) int {
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w, _ := termbox.Size()
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if w >= 80 {
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w = w / 2
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}
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bucket_fg := style.default_fg
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bucket_bg := style.default_bg
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if comparePaths(screen.current_path, bp.path) {
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bucket_fg = style.cursor_fg
|
|
bucket_bg = style.cursor_bg
|
|
}
|
|
|
|
pair_string := strings.Repeat(" ", screen.db.getDepthFromPath(bp.path)*2)
|
|
pair_string = fmt.Sprintf("%s%s: %s", pair_string, bp.key, bp.val)
|
|
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.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 {
|
|
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("Input new value for '%s'", p.key), inp_w, termbox_util.ALIGN_CENTER))
|
|
mod.SetValue(p.val)
|
|
}
|
|
screen.input_modal = mod
|
|
screen.mode = MODE_CHANGE_VAL
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (screen *BrowserScreen) startInsertItemAtParent(tp BoltType) bool {
|
|
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)
|
|
screen.input_modal = mod
|
|
if len(screen.current_path) == 1 {
|
|
// in the root directory
|
|
if tp == TYPE_BUCKET {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Bucket", inp_w, termbox_util.ALIGN_CENTER))
|
|
screen.mode = MODE_INSERT_BUCKET | MODE_MOD_TO_PARENT
|
|
return true
|
|
}
|
|
} else {
|
|
if tp == TYPE_BUCKET {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Bucket", inp_w, termbox_util.ALIGN_CENTER))
|
|
screen.mode = MODE_INSERT_BUCKET | MODE_MOD_TO_PARENT
|
|
return true
|
|
} else if tp == TYPE_PAIR {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Pair", inp_w, termbox_util.ALIGN_CENTER))
|
|
mod.SetText("New Pair Key:")
|
|
screen.mode = MODE_INSERT_PAIR | MODE_MOD_TO_PARENT
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (screen *BrowserScreen) startInsertItem(tp BoltType) bool {
|
|
_, p, e := screen.db.getGenericFromPath(screen.current_path)
|
|
if e == nil {
|
|
return false
|
|
}
|
|
if p != nil {
|
|
// if the current path is at a pair, we _must_ go to the parent
|
|
return screen.startInsertItemAtParent(tp)
|
|
}
|
|
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)
|
|
screen.input_modal = mod
|
|
if len(screen.current_path) == 1 {
|
|
// in the root directory
|
|
if tp == TYPE_BUCKET {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Bucket", inp_w, termbox_util.ALIGN_CENTER))
|
|
screen.mode = MODE_INSERT_BUCKET
|
|
return true
|
|
}
|
|
} else {
|
|
if tp == TYPE_BUCKET {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Bucket", inp_w, termbox_util.ALIGN_CENTER))
|
|
screen.mode = MODE_INSERT_BUCKET
|
|
return true
|
|
} else if tp == TYPE_PAIR {
|
|
mod.SetTitle(termbox_util.AlignText("Create New Pair", inp_w, termbox_util.ALIGN_CENTER))
|
|
screen.mode = MODE_INSERT_PAIR
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func comparePaths(p1, p2 []string) bool {
|
|
return strings.Join(p1, "/") == strings.Join(p2, "/")
|
|
}
|