Remove extraneous methods

README.md

@@ -1,34 +1,79 @@
-# Bubbles
+Bubbles
+=======
 
-Some components for [Bubble Tea](https://github.com/charmbraclet/bubbletea):
+<p>
+    <a href="https://pkg.go.dev/github.com/charmbracelet/bubbles?tab=doc"><img src="https://godoc.org/github.com/golang/gddo?status.svg" alt="GoDoc"></a>
+    <a href="https://github.com/charmbracelet/bubbles/actions"><img src="https://github.com/charmbracelet/glow/workflows/build/badge.svg" alt="Build Status"></a>
+</p>
+
+Some components for [Bubble Tea](https://github.com/charmbraclet/bubbletea) applications.
+
+These components are used in production in [Glow][glow] and [Charm][charm].
+
+[glow]: https://github.com/charmbraclet/glow
+[charm]: https://github.com/charmbraclet/charm
 
-* Spinner
-* Text Input
-* Paginator
-* Viewport
 
 ## Spinner
 
-A spinner, useful for indicating that some kind of invisible operation is
-happening. There are a couple default ones, but you can also pass your own
-”frames.”
+<img src="https://stuff.charm.sh/bubbles-examples/spinner.gif" width="400" alt="Spinner Example">
+
+A spinner, useful for indicating that some kind an operation is happening.
+There are a couple default ones, but you can also pass your own ”frames.”
+
+* [Example code](https://github.com/charmbracelet/tea/tree/master/examples/spinner/main.go)
+
 
 ## Text Input
 
-A text input field, akin to an `<input type="text">` in HTML.
+<img src="https://stuff.charm.sh/bubbles-examples/textinput.gif" width="400" alt="Text Input Example">
+
+A text input field, akin to an `<input type="text">` in HTML. Supports unicode,
+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)
+
 
 ## Paginator
 
+<img src="https://stuff.charm.sh/bubbles-examples/pagination.gif" width="200" alt="Paginator Example">
+
 A component for handling pagination logic and optionally drawing pagination UI.
+Supports "dot-style" pagination (similar to what you might see on iOS) and
+numeric page numbering, but you could also just use this component for the
+logic and visualize pagination however you like.
+
+This component is used in [Glow][glow] to browse documents and [Charm][charm] to
+browse SSH keys.
+
 
 ## Viewport
 
-A viewport for vertically scrolling content which optionally includes standard
+<img src="https://stuff.charm.sh/bubbles-examples/viewport.gif" width="600" alt="Viewport Example">
+
+A viewport for vertically scrolling content. Optionally includes standard
 pager keybindings and mouse wheel support. A high performance mode is available
-for applications which make use of the alterate screen buffer. This is
-generally only necessary when dealing with content with a very large amount of
-ANSI escape sequences.
+for applications which make use of the alterate screen buffer.
+
+* [Example code](https://github.com/charmbracelet/tea/tree/master/examples/pager/main.go)
+
+This compoent is well complimented with [Reflow][reflow] for ANSI-aware
+indenting and text wrapping.
+
+[reflow]: https://github.com/muesli/reflow
+
 
 ## License
 
 [MIT](https://github.com/charmbracelet/teaparty/raw/master/LICENSE)
+
+
+***
+
+A [Charm](https://charm.sh) project.
+
+<img alt="the Charm logo" src="https://stuff.charm.sh/charm-badge.jpg" width="400">
+
+Charm热爱开源!

go.mod

@@ -3,6 +3,7 @@ module github.com/charmbracelet/bubbles
 go 1.13
 
 require (
+	github.com/atotto/clipboard v0.1.2 // indirect
 	github.com/charmbracelet/bubbletea v0.9.1-0.20200713153904-2f53eeb54b90
 	github.com/mattn/go-runewidth v0.0.9
 	github.com/muesli/termenv v0.5.3-0.20200625163851-04b5c30e4c04

go.sum

@@ -1,3 +1,5 @@
+github.com/atotto/clipboard v0.1.2 h1:YZCtFu5Ie8qX2VmVTBnrqLSiU9XOWwqNRmdT3gIQzbY=
+github.com/atotto/clipboard v0.1.2/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/google/goterm v0.0.0-20190703233501-fc88cf888a3f h1:5CjVwnuUcp5adK4gmY6i72gpVFVnZDP2h5TmPScB6u4=
 github.com/google/goterm v0.0.0-20190703233501-fc88cf888a3f/go.mod h1:nOFQdrUlIlx6M6ODdSpBj1NVA+VgLC6kmw60mkw34H4=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=

textinput/textinput.go

@@ -5,6 +5,7 @@ import (
 	"time"
 	"unicode"
 
+	"github.com/atotto/clipboard"
 	tea "github.com/charmbracelet/bubbletea"
 	rw "github.com/mattn/go-runewidth"
 	"github.com/muesli/termenv"
@@ -126,6 +127,47 @@ func (m *Model) Reset() {
 	m.blink = false
 }
 
+// Paste pastes the contents of the clipboard into the text area (if supported).
+func (m *Model) Paste() {
+	pasteString, err := clipboard.ReadAll()
+	if err != nil {
+		m.Err = err
+	}
+	paste := []rune(pasteString)
+
+	availSpace := m.CharLimit - len(m.value)
+
+	// If the char limit's been reached cancel
+	if m.CharLimit > 0 && availSpace <= 0 {
+		return
+	}
+
+	// If there's not enough space to paste the whole thing cut the pasted
+	// runes down so they'll fit
+	if availSpace < len(paste) {
+		paste = paste[:len(paste)-availSpace]
+	}
+
+	// Stuff before and after the cursor
+	head := m.value[:m.pos]
+	tailSrc := m.value[m.pos:]
+	tail := make([]rune, len(tailSrc))
+	copy(tail, tailSrc)
+
+	// Insert pasted runes
+	for _, r := range paste {
+		head = append(head, r)
+		availSpace--
+		m.pos++
+		if m.CharLimit > 0 && availSpace <= 0 {
+			break
+		}
+	}
+
+	// Put it all back together
+	m.value = append(head, tail...)
+}
+
 // If a max width is defined, perform some logic to treat the visible area
 // as a horizontally scrolling viewport.
 func (m *Model) handleOverflow() {
@@ -282,8 +324,10 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 			fallthrough
 		case tea.KeyDelete:
 			if len(m.value) > 0 {
-				m.value = append(m.value[:m.pos-1], m.value[m.pos:]...)
-				m.pos--
+				m.value = append(m.value[:max(0, m.pos-1)], m.value[m.pos:]...)
+				if m.pos > 0 {
+					m.pos--
+				}
 			}
 		case tea.KeyLeft:
 			if msg.Alt { // alt+left arrow, back one word
@@ -320,6 +364,8 @@ func Update(msg tea.Msg, m Model) (Model, tea.Cmd) {
 			m.value = m.value[m.pos:]
 			m.pos = 0
 			m.offset = 0
+		case tea.KeyCtrlV: // ^V paste
+			m.Paste()
 		case tea.KeyRune: // input a regular character
 
 			if msg.Alt {
@@ -366,7 +412,7 @@ func View(model tea.Model) string {
 	}
 
 	value := m.value[m.offset:m.offsetRight]
-	pos := m.pos - m.offset
+	pos := max(0, m.pos-m.offset)
 
 	v := m.colorText(string(value[:pos]))
 

viewport/viewport.go

@@ -37,21 +37,6 @@ type Model struct {
 	lines []string
 }
 
-// TODO: do we really need this?
-func NewModel(width, height int) Model {
-	return Model{
-		Width:  width,
-		Height: height,
-	}
-}
-
-// TODO: do we really need this?
-func (m Model) SetSize(yPos, width, height int) {
-	m.YPosition = yPos
-	m.Width = width
-	m.Height = height
-}
-
 // AtTop returns whether or not the viewport is in the very top position.
 func (m Model) AtTop() bool {
 	return m.YOffset <= 0