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112 lines
1.6 KiB
112 lines
1.6 KiB
package acedoc
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import (
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"strings"
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"sync"
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)
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type Document struct {
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mtx sync.RWMutex
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lines []string
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deltas []Delta
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clients []*Client
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logger *Client
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}
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type DeltaHandler interface {
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Handle([]Delta) error
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}
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type DeltaHandlerFunc func([]Delta) error
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func (fn DeltaHandlerFunc) Handle(d []Delta) error {
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return fn(d)
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}
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func NewString(str string) *Document {
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d := &Document{
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lines: strings.Split(str, "\n"),
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}
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return d
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}
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func (d *Document) nLines() uint {
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n := uint(len(d.lines))
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if n == 0 {
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n = 1
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}
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return n
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}
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func (d Delta) nLines() uint {
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n := uint(len(d.Lines))
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if n == 0 {
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n = 1
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}
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return n
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}
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func (d Document) line(i uint) string {
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if i >= uint(len(d.lines)) {
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return ""
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}
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return d.lines[i]
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}
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func (d Delta) line(i uint) string {
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if i >= uint(len(d.Lines)) {
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return ""
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}
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return d.Lines[i]
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}
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func (d Delta) nRows() uint {
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r := d.End.Row - d.Start.Row
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r += 1
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if r == 0 {
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return 1
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}
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return r
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}
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func (d Delta) rows() int {
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r := int(d.End.Row) - int(d.Start.Row)
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return r
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}
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func (d Delta) cols() int {
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if d.Start.Row == d.End.Row {
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return int(d.End.Column) - int(d.Start.Column)
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} else {
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return int(d.End.Column)
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}
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}
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func (d *Document) Contents() string {
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d.mtx.RLock()
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defer d.mtx.RUnlock()
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return d.contents()
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}
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func (d *Document) contents() string {
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return strings.Join(d.lines, "\n")
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}
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type Position struct {
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Row uint `json:"row"`
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Column uint `json:"column"`
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}
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func (d *Document) InDocument(pos Position) bool {
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if pos.Row > d.nLines() {
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return false
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}
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line := d.line(pos.Row)
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if pos.Column > uint(len(line)) {
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return false
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}
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return true
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}
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