gilo/editor/document.go

package editor

import (
	"bufio"
	"log"
	"os"
)

type document struct {
	filename string
	rows     []*row
}

func newDocument() *document {
	var rows []*row

	return &document{
		"",
		rows,
	}
}

func (d *document) open(filename string) {
	file, err := os.Open(filename)
	if err != nil {
		log.Fatalf("failed to open file")
	}
	defer file.Close()

	d.filename = filename
	scanner := bufio.NewScanner(file)
	scanner.Split(bufio.ScanLines)

	for scanner.Scan() {
		d.appendRow(scanner.Text())
	}
}

func (d *document) appendRow(s string) {
	newRow := newRow(s)
	newRow.update()
	d.rows = append(d.rows, newRow)
}

func (d *document) rowCount() int {
	return len(d.rows)
}