slow hacks

ked/buffer.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"os"
+	"bufio"
+	"fmt"
+)
+
+type Buffer struct {
+	contents []string
+	filename string
+	cursor Cursor
+	dirty bool
+}
+
+func NewBuffer(filename string) (*Buffer, error) {
+	buffer := &Buffer{
+		contents: []string{""},
+		filename: filename,
+		cursor: Cursor{row: 0, col: 0},
+	}
+
+	err := buffer.Load()
+	return buffer, err
+}
+
+func (buffer *Buffer) Load() error {
+	if buffer.filename == "" {
+		return nil
+	}
+	
+	file, err := os.Open(buffer.filename)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer file.Close()
+
+	buffer.contents = []string{}
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		buffer.contents = append(buffer.contents, line)
+		fmt.Printf("'%s'\n", line)
+	}
+
+	return nil
+}
+
+func (buffer *Buffer) Close() error {
+	return nil
+}

ked/cursor.go

@@ -0,0 +1,39 @@
+package main
+
+func clamp(int v, int m) int {
+	if v < 0 {
+		return 0
+	}
+	if v > m {
+		return m
+	}
+	return v
+}
+
+type Cursor struct {
+	row int
+	col int
+}
+
+func (c Cursor) clamp(dr, dc, maxRow, maxCol int) Cursor {
+	return Cursor{
+		row: clamp(c.row+dr, maxRow),
+		col: clamp(c.col+dc, maxCol),
+	}
+}
+
+func (c Cursor) left(maxRow, maxCol int) Cursor {
+	return c.clamp(0, -1, maxRow, maxCol)
+}
+
+func (c Cursor) right(maxRow, maxCol) Cursor {
+	return c.clamp(0, 1, maxRow, maxCol)
+}
+
+func (c Cursor) up(maxRow, maxCol) Cursor {
+	return c.clamp(-1, 0, maxRow, maxCol)
+}
+
+func (c Cursor) down(maxRow, maxCol) Cursor {
+	return c.clamp(1, 0, maxRow, maxCol)
+}

ked/go.mod

@@ -0,0 +1,3 @@
+module gitlab.com/kisom/ked
+
+go 1.12

ked/ked.go

@@ -0,0 +1,6 @@
+package main
+
+func main() {
+	buffer := NewBuffer("ked.go")
+	buffer.Close()
+}