Initial commit, lots of cleanup and stuff to do, it may not work.

uiterm/textview.go

@@ -0,0 +1,160 @@
+package uiterm
+
+import (
+	"strings"
+
+	"github.com/nsf/termbox-go"
+)
+
+type Textview struct {
+	Lines          []string
+	CurrentLine    int
+	Fg, Bg         Attribute
+	showTimestamps bool
+	parsedLines    []string
+
+	ui             *Ui
+	x0, y0, x1, y1 int
+}
+
+func (t *Textview) uiInitialize(ui *Ui) {
+	t.ui = ui
+	t.showTimestamps = true
+}
+
+func (t *Textview) ToggleTimestamps() {
+	if t.showTimestamps == true {
+		t.showTimestamps = false
+	} else {
+		t.showTimestamps = true
+	}
+	t.updateParsedLines()
+	t.uiDraw()
+}
+
+func (t *Textview) uiSetActive(active bool) {
+}
+
+func (t *Textview) uiSetBounds(x0, y0, x1, y1 int) {
+	t.x0 = x0
+	t.y0 = y0
+	t.x1 = x1
+	t.y1 = y1
+	t.updateParsedLines()
+	t.uiDraw()
+}
+
+func (t *Textview) ScrollUp() {
+	if newLine := t.CurrentLine + 1; newLine < len(t.parsedLines) {
+		t.CurrentLine = newLine
+	}
+	t.uiDraw()
+}
+
+func (t *Textview) ScrollDown() {
+	if newLine := t.CurrentLine - 1; newLine >= 0 {
+		t.CurrentLine = newLine
+	}
+	t.uiDraw()
+}
+
+func (t *Textview) ScrollTop() {
+	if newLine := len(t.parsedLines) - 1; newLine > 0 {
+		t.CurrentLine = newLine
+	} else {
+		t.CurrentLine = 0
+	}
+	t.uiDraw()
+}
+
+func (t *Textview) ScrollBottom() {
+	t.CurrentLine = 0
+	t.uiDraw()
+}
+
+func (t *Textview) updateParsedLines() {
+	width := t.x1 - t.x0
+
+	if t.Lines == nil || width <= 0 {
+		t.parsedLines = nil
+		return
+	}
+
+	parsed := make([]string, 0, len(t.Lines))
+	for _, line := range t.Lines {
+		var l = line
+		if t.showTimestamps == false {
+			l = strings.TrimSpace(strings.Split(line, "]")[1])
+		}
+		current := ""
+		chars := 0
+		reader := strings.NewReader(l)
+		for {
+			if chars >= width {
+				parsed = append(parsed, current)
+				chars = 0
+				current = ""
+			}
+			if reader.Len() <= 0 {
+				if chars > 0 {
+					parsed = append(parsed, current)
+				}
+				break
+			}
+			if ch, _, err := reader.ReadRune(); err == nil {
+				current = current + string(ch)
+				chars++
+			}
+		}
+	}
+	t.parsedLines = parsed
+}
+
+func (t *Textview) AddLine(line string) {
+	t.Lines = append(t.Lines, line)
+	t.updateParsedLines()
+	t.uiDraw()
+}
+
+func (t *Textview) Clear() {
+	t.Lines = nil
+	t.CurrentLine = 0
+	t.parsedLines = nil
+	t.uiDraw()
+}
+
+func (t *Textview) uiDraw() {
+	t.ui.beginDraw()
+	defer t.ui.endDraw()
+
+	var reader *strings.Reader
+	writeableLines := t.y1 - t.y0
+	lineNum := 0
+	if writeableLines < len(t.parsedLines) {
+		lineNum = len(t.parsedLines) - writeableLines
+	}
+	//Beep()
+	for y := t.y0; y < writeableLines; y++ {
+		if lineNum < len(t.parsedLines) {
+			reader = strings.NewReader(t.parsedLines[lineNum])
+		} else {
+			reader = nil
+		}
+		for x := t.x0; x < t.x1; x++ {
+			var chr rune = ' '
+			if reader != nil {
+				if ch, _, err := reader.ReadRune(); err == nil {
+					chr = ch
+				} //no err
+			} //reader != nil
+			termbox.SetCell(x, y, chr, termbox.Attribute(t.Fg), termbox.Attribute(t.Bg))
+		} //each x
+		lineNum++
+	} //each y
+} //func
+
+func (t *Textview) uiKeyEvent(key Key) {
+}
+
+func (t *Textview) uiCharacterEvent(chr rune) {
+}