Return the value of paginator.TotalPages in SetTotalPages...

when the given number of items is below 1.

.github/workflows/build.yml

@@ -4,14 +4,14 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x, 1.15.x]
+        go-version: [~1.13, ^1]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     env:
       GO111MODULE: "on"
     steps:
       - name: Install Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go-version }}
 
@@ -26,12 +26,3 @@ jobs:
 
       - name: Test
         run: go test ./...
-
-      - name: Coverage
-        env:
-          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          go test -race -covermode atomic -coverprofile=profile.cov ./...
-          GO111MODULE=off go get github.com/mattn/goveralls
-          $(go env GOPATH)/bin/goveralls -coverprofile=profile.cov -service=github
-        if: matrix.go-version == '1.15.x' && matrix.os == 'ubuntu-latest'

.github/workflows/coverage.yml

@@ -0,0 +1,28 @@
+name: coverage
+on: [push, pull_request]
+
+jobs:
+  coverage:
+    strategy:
+      matrix:
+        go-version: [^1]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    env:
+      GO111MODULE: "on"
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Coverage
+        env:
+          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          go test -race -covermode atomic -coverprofile=profile.cov ./...
+          GO111MODULE=off go get github.com/mattn/goveralls
+          $(go env GOPATH)/bin/goveralls -coverprofile=profile.cov -service=github

README.md

@@ -1,9 +1,10 @@
 Bubbles
 =======
 
+[![Latest Release](https://img.shields.io/github/release/charmbracelet/bubbles.svg)](https://github.com/charmbracelet/bubbles/releases)
+[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/charmbracelet/bubbles)
 [![Build Status](https://github.com/charmbracelet/bubbles/workflows/build/badge.svg)](https://github.com/charmbracelet/bubbles/actions)
 [![Go ReportCard](http://goreportcard.com/badge/charmbracelet/bubbles)](http://goreportcard.com/report/charmbracelet/bubbles)
-[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/charmbracelet/bubbles)
 
 Some components for [Bubble Tea](https://github.com/charmbracelet/bubbletea) applications.
 
@@ -32,7 +33,7 @@ pasting, in-place scrolling when the value exceeds the width of the element and
 the common, and many customization options.
 
 * [Example code, one field](https://github.com/charmbracelet/tea/tree/master/examples/textinput/main.go)
-* [Example code, many fields](https://github.com/charmbracelet/tea/tree/master/examples/textinput/main.go)
+* [Example code, many fields](https://github.com/charmbracelet/tea/tree/master/examples/textinputs/main.go)
 
 
 ## Paginator

paginator/paginator.go

@@ -40,8 +40,8 @@ type Model struct {
 // used for other things beyond navigating sets. Note that it both returns the
 // number of total pages and alters the model.
 func (m *Model) SetTotalPages(items int) int {
-	if items == 0 {
-		return 0
+	if items < 1 {
+		return m.TotalPages
 	}
 	n := items / m.PerPage
 	if items%m.PerPage > 0 {

textinput/textinput.go

@@ -11,7 +11,7 @@ import (
 	"github.com/muesli/termenv"
 )
 
-const defaultBlinkSpeed = time.Millisecond * 600
+const defaultBlinkSpeed = time.Millisecond * 530
 
 const (
 	// EchoNormal displays text as is. This is the default behavior.
@@ -91,7 +91,7 @@ func (m *Model) SetValue(s string) {
 		m.value = runes
 	}
 	if m.pos > len(m.value) {
-		m.pos = len(m.value)
+		m.SetCursor(len(m.value))
 	}
 	m.handleOverflow()
 }
@@ -105,19 +105,18 @@ func (m Model) Value() string {
 // out of bounds the cursor will be moved to the start or end accordingly.
 func (m *Model) SetCursor(pos int) {
 	m.pos = clamp(pos, 0, len(m.value))
+	m.blink = false
 	m.handleOverflow()
 }
 
 // CursorStart moves the cursor to the start of the field.
 func (m *Model) CursorStart() {
-	m.pos = 0
-	m.handleOverflow()
+	m.SetCursor(0)
 }
 
 // CursorEnd moves the cursor to the end of the field.
 func (m *Model) CursorEnd() {
-	m.pos = len(m.value)
-	m.handleOverflow()
+	m.SetCursor(len(m.value))
 }
 
 // Focused returns the focus state on the model.
@@ -140,8 +139,7 @@ func (m *Model) Blur() {
 // Reset sets the input to its default state with no input.
 func (m *Model) Reset() {
 	m.value = nil
-	m.pos = 0
-	m.blink = false
+	m.SetCursor(0)
 }
 
 // Paste pastes the contents of the clipboard into the text area (if supported).
@@ -152,7 +150,10 @@ func (m *Model) Paste() {
 	}
 	paste := []rune(pasteString)
 
-	availSpace := m.CharLimit - len(m.value)
+	var availSpace int
+	if m.CharLimit > 0 {
+		availSpace = m.CharLimit - len(m.value)
+	}
 
 	// If the char limit's been reached cancel
 	if m.CharLimit > 0 && availSpace <= 0 {
@@ -161,7 +162,7 @@ func (m *Model) Paste() {
 
 	// If there's not enough space to paste the whole thing cut the pasted
 	// runes down so they'll fit
-	if availSpace < len(paste) {
+	if m.CharLimit > 0 && availSpace < len(paste) {
 		paste = paste[:len(paste)-availSpace]
 	}
 
@@ -174,15 +175,20 @@ func (m *Model) Paste() {
 	// Insert pasted runes
 	for _, r := range paste {
 		head = append(head, r)
-		availSpace--
 		m.pos++
-		if m.CharLimit > 0 && availSpace <= 0 {
-			break
+		if m.CharLimit > 0 {
+			availSpace--
+			if availSpace <= 0 {
+				break
+			}
 		}
 	}
 
 	// Put it all back together
 	m.value = append(head, tail...)
+
+	// Reset blink state and run overflow checks
+	m.SetCursor(m.pos)
 }
 
 // If a max width is defined, perform some logic to treat the visible area
@@ -250,6 +256,67 @@ func (m *Model) colorPlaceholder(s string) string {
 		String()
 }
 
+// deleteWordLeft deletes the word left to the cursor.
+func (m *Model) deleteWordLeft() {
+	if m.pos == 0 || len(m.value) == 0 {
+		return
+	}
+
+	i := m.pos
+	m.SetCursor(m.pos - 1)
+	for unicode.IsSpace(m.value[m.pos]) {
+		// ignore series of whitespace before cursor
+		m.SetCursor(m.pos - 1)
+	}
+
+	for m.pos > 0 {
+		if !unicode.IsSpace(m.value[m.pos]) {
+			m.SetCursor(m.pos - 1)
+		} else {
+			if m.pos > 0 {
+				// keep the previous space
+				m.SetCursor(m.pos + 1)
+			}
+			break
+		}
+	}
+
+	if i > len(m.value) {
+		m.value = m.value[:m.pos]
+	} else {
+		m.value = append(m.value[:m.pos], m.value[i:]...)
+	}
+}
+
+// deleteWordRight deletes the word right to the cursor.
+func (m *Model) deleteWordRight() {
+	if m.pos >= len(m.value) || len(m.value) == 0 {
+		return
+	}
+
+	i := m.pos
+	m.SetCursor(m.pos + 1)
+	for unicode.IsSpace(m.value[m.pos]) {
+		// ignore series of whitespace after cursor
+		m.SetCursor(m.pos + 1)
+	}
+
+	for m.pos < len(m.value) {
+		if !unicode.IsSpace(m.value[m.pos]) {
+			m.SetCursor(m.pos + 1)
+		} else {
+			break
+		}
+	}
+
+	if m.pos > len(m.value) {
+		m.value = m.value[:i]
+	} else {
+		m.value = append(m.value[:i], m.value[m.pos:]...)
+	}
+	m.SetCursor(i)
+}
+
 func (m *Model) wordLeft() {
 	if m.pos == 0 || len(m.value) == 0 {
 		return
@@ -259,7 +326,7 @@ func (m *Model) wordLeft() {
 
 	for i >= 0 {
 		if unicode.IsSpace(m.value[i]) {
-			m.pos--
+			m.SetCursor(m.pos - 1)
 			i--
 		} else {
 			break
@@ -268,7 +335,7 @@ func (m *Model) wordLeft() {
 
 	for i >= 0 {
 		if !unicode.IsSpace(m.value[i]) {
-			m.pos--
+			m.SetCursor(m.pos - 1)
 			i--
 		} else {
 			break
@@ -285,7 +352,7 @@ func (m *Model) wordRight() {
 
 	for i < len(m.value) {
 		if unicode.IsSpace(m.value[i]) {
-			m.pos++
+			m.SetCursor(m.pos + 1)
 			i++
 		} else {
 			break
@@ -294,7 +361,7 @@ func (m *Model) wordRight() {
 
 	for i < len(m.value) {
 		if !unicode.IsSpace(m.value[i]) {
-			m.pos++
+			m.SetCursor(m.pos + 1)
 			i++
 		} else {
 			break
@@ -351,10 +418,14 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 	case tea.KeyMsg:
 		switch msg.Type {
 		case tea.KeyBackspace: // delete character before cursor
-			if len(m.value) > 0 {
-				m.value = append(m.value[:max(0, m.pos-1)], m.value[m.pos:]...)
-				if m.pos > 0 {
-					m.pos--
+			if msg.Alt {
+				m.deleteWordLeft()
+			} else {
+				if len(m.value) > 0 {
+					m.value = append(m.value[:max(0, m.pos-1)], m.value[m.pos:]...)
+					if m.pos > 0 {
+						m.SetCursor(m.pos - 1)
+					}
 				}
 			}
 		case tea.KeyLeft:
@@ -363,7 +434,7 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 				break
 			}
 			if m.pos > 0 {
-				m.pos--
+				m.SetCursor(m.pos - 1)
 			}
 		case tea.KeyRight:
 			if msg.Alt { // alt+right arrow, forward one word
@@ -371,8 +442,10 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 				break
 			}
 			if m.pos < len(m.value) {
-				m.pos++
+				m.SetCursor(m.pos + 1)
 			}
+		case tea.KeyCtrlW: // ^W, delete word left of cursor
+			m.deleteWordLeft()
 		case tea.KeyCtrlF: // ^F, forward one character
 			fallthrough
 		case tea.KeyCtrlB: // ^B, back one charcter
@@ -387,16 +460,19 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 			m.CursorEnd()
 		case tea.KeyCtrlK: // ^K, kill text after cursor
 			m.value = m.value[:m.pos]
-			m.pos = len(m.value)
+			m.SetCursor(len(m.value))
 		case tea.KeyCtrlU: // ^U, kill text before cursor
 			m.value = m.value[m.pos:]
-			m.pos = 0
+			m.SetCursor(0)
 			m.offset = 0
 		case tea.KeyCtrlV: // ^V paste
 			m.Paste()
 		case tea.KeyRune: // input a regular character
-
 			if msg.Alt {
+				if msg.Rune == 'd' { // alt+d, delete word right of cursor
+					m.deleteWordRight()
+					break
+				}
 				if msg.Rune == 'b' { // alt+b, back one word
 					m.wordLeft()
 					break
@@ -410,7 +486,7 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 			// Input a regular character
 			if m.CharLimit <= 0 || len(m.value) < m.CharLimit {
 				m.value = append(m.value[:m.pos], append([]rune{msg.Rune}, m.value[m.pos:]...)...)
-				m.pos++
+				m.SetCursor(m.pos + 1)
 			}
 		}
 

viewport/viewport.go

@@ -77,7 +77,7 @@ func (m *Model) SetContent(s string) {
 func (m Model) visibleLines() (lines []string) {
 	if len(m.lines) > 0 {
 		top := max(0, m.YOffset)
-		bottom := min(len(m.lines), m.YOffset+m.Height)
+		bottom := clamp(m.YOffset+m.Height, top, len(m.lines))
 		lines = m.lines[top:bottom]
 	}
 	return lines
@@ -125,7 +125,7 @@ func (m *Model) HalfViewDown() (lines []string) {
 
 	if len(m.lines) > 0 {
 		top := max(m.YOffset+m.Height/2, 0)
-		bottom := min(m.YOffset+m.Height, len(m.lines)-1)
+		bottom := clamp(m.YOffset+m.Height, top, len(m.lines)-1)
 		lines = m.lines[top:bottom]
 	}
 
@@ -145,7 +145,7 @@ func (m *Model) HalfViewUp() (lines []string) {
 
 	if len(m.lines) > 0 {
 		top := max(m.YOffset, 0)
-		bottom := min(m.YOffset+m.Height/2, len(m.lines)-1)
+		bottom := clamp(m.YOffset+m.Height/2, top, len(m.lines)-1)
 		lines = m.lines[top:bottom]
 	}
 
@@ -171,7 +171,7 @@ func (m *Model) LineDown(n int) (lines []string) {
 
 	if len(m.lines) > 0 {
 		top := max(m.YOffset+m.Height-n, 0)
-		bottom := min(m.YOffset+m.Height, len(m.lines)-1)
+		bottom := clamp(m.YOffset+m.Height, top, len(m.lines)-1)
 		lines = m.lines[top:bottom]
 	}
 
@@ -193,7 +193,7 @@ func (m *Model) LineUp(n int) (lines []string) {
 
 	if len(m.lines) > 0 {
 		top := max(0, m.YOffset)
-		bottom := min(m.YOffset+n, len(m.lines)-1)
+		bottom := clamp(m.YOffset+n, top, len(m.lines)-1)
 		lines = m.lines[top:bottom]
 	}
 
@@ -210,7 +210,7 @@ func (m *Model) GotoTop() (lines []string) {
 
 	if len(m.lines) > 0 {
 		top := m.YOffset
-		bottom := min(m.YOffset+m.Height, len(m.lines)-1)
+		bottom := clamp(m.YOffset+m.Height, top, len(m.lines)-1)
 		lines = m.lines[top:bottom]
 	}
 
@@ -245,7 +245,7 @@ func Sync(m Model) tea.Cmd {
 	// TODO: we should probably use m.visibleLines() rather than these two
 	// expressions.
 	top := max(m.YOffset, 0)
-	bottom := min(m.YOffset+m.Height, len(m.lines)-1)
+	bottom := clamp(m.YOffset+m.Height, 0, len(m.lines)-1)
 
 	return tea.SyncScrollArea(
 		m.lines[top:bottom],
@@ -376,6 +376,10 @@ func View(m Model) string {
 
 // ETC
 
+func clamp(v, low, high int) int {
+	return min(high, max(low, v))
+}
+
 func min(a, b int) int {
 	if a < b {
 		return a