WTF-484 DigitalOcean module (#782)

* WTF-484 DigitalOcean module stubbed out
* WTF-484 Delete droplets via Ctrl-d
* WTF-484 Rebasing off master after a long time away
* WTF-484 Improve DigitalOcean display
* WTF-484 Can shutdown and restart the selected droplet
* WTF-484 Display info about the selected droplet using the ? key
* WTF-484 Display info about the selected droplet using the Return key
* WTF-484 Greatly improve the utils.Truncate function
* WTF-484 Display a droplet's features in the info modal
* WTF-484 Change reboot key from r to b to not conflict with refresh
* WTF-484 Panic if a keyboard control is mapped to the same character more than once
* WTF-484 Colorize droplet status indicator
* WTF-484 Extract view.InfoTable out into a reusable component

utils/text.go

@@ -27,16 +27,18 @@ func CenterText(str string, width int) string {
 // containing it. This is helpful for extending row highlighting across the entire width
 // of the view
 func HighlightableHelper(view *tview.TextView, input string, idx, offset int) string {
-	fmtStr := fmt.Sprintf(`["%d"][""]`, idx)
 	_, _, w, _ := view.GetInnerRect()
+
+	fmtStr := fmt.Sprintf(`["%d"][""]`, idx)
 	fmtStr += input
-	fmtStr += RowPadding(offset, w+1)
+	fmtStr += RowPadding(offset, w)
 	fmtStr += `[""]` + "\n"
+
 	return fmtStr
 }
 
 // RowPadding returns a padding for a row to make it the full width of the containing widget.
-// Useful for ensurig row highlighting spans the full width (I suspect tcell has a better
+// Useful for ensuring row highlighting spans the full width (I suspect tcell has a better
 // way to do this, but I haven't yet found it)
 func RowPadding(offset int, max int) string {
 	padSize := max - offset
@@ -46,3 +48,27 @@ func RowPadding(offset int, max int) string {
 
 	return strings.Repeat(" ", padSize)
 }
+
+// Truncate chops a given string at len length. Appends an ellipse character if warranted
+func Truncate(src string, maxLen int, withEllipse bool) string {
+	if len(src) < 1 || maxLen < 1 {
+		return ""
+	}
+
+	if maxLen == 1 {
+		return src[:1]
+	}
+
+	var runeCount = 0
+	for idx := range src {
+		runeCount++
+		if runeCount > maxLen {
+			if withEllipse == true {
+				return src[:idx-1] + "…"
+			}
+
+			return src[:idx]
+		}
+	}
+	return src
+}

utils/text_test.go

@@ -17,7 +17,7 @@ func Test_HighlightableHelper(t *testing.T) {
 	view := tview.NewTextView()
 	actual := HighlightableHelper(view, "cats", 0, 5)
 
-	assert.Equal(t, "[\"0\"][\"\"]cats           [\"\"]\n", actual)
+	assert.Equal(t, "[\"0\"][\"\"]cats          [\"\"]\n", actual)
 }
 
 func Test_RowPadding(t *testing.T) {
@@ -26,3 +26,20 @@ func Test_RowPadding(t *testing.T) {
 	assert.Equal(t, " ", RowPadding(1, 2))
 	assert.Equal(t, "     ", RowPadding(0, 5))
 }
+
+func Test_Truncate(t *testing.T) {
+	assert.Equal(t, "", Truncate("cat", 0, false))
+	assert.Equal(t, "c", Truncate("cat", 1, false))
+	assert.Equal(t, "ca", Truncate("cat", 2, false))
+	assert.Equal(t, "cat", Truncate("cat", 3, false))
+	assert.Equal(t, "cat", Truncate("cat", 4, false))
+
+	assert.Equal(t, "", Truncate("cat", 0, true))
+	assert.Equal(t, "c", Truncate("cat", 1, true))
+	assert.Equal(t, "c…", Truncate("cat", 2, true))
+	assert.Equal(t, "cat", Truncate("cat", 3, true))
+	assert.Equal(t, "cat", Truncate("cat", 4, true))
+
+	// Only supports non-ellipsed emoji
+	assert.Equal(t, "🌮🚙", Truncate("🌮🚙💥👾", 2, false))
+}