From fb44abddf8e3f232f63ad854b9f4226435de1335 Mon Sep 17 00:00:00 2001
From: Maas Lalani <maas@lalani.dev>
Date: Tue, 9 Aug 2022 16:25:31 -0400
Subject: [PATCH] refactor: split files into {modal,normal,insert}.go

---
 textarea/insert.go   | 117 ++++++++++++++++
 textarea/modal.go    |  75 ++++++++++
 textarea/normal.go   | 150 ++++++++++++++++++++
 textarea/textarea.go | 316 +------------------------------------------
 4 files changed, 343 insertions(+), 315 deletions(-)
 create mode 100644 textarea/insert.go
 create mode 100644 textarea/modal.go
 create mode 100644 textarea/normal.go

diff --git a/textarea/insert.go b/textarea/insert.go
new file mode 100644
index 0000000..2337ab4
--- /dev/null
+++ b/textarea/insert.go
@@ -0,0 +1,117 @@
+package textarea
+
+import (
+	tea "github.com/charmbracelet/bubbletea"
+	rw "github.com/mattn/go-runewidth"
+)
+
+func (m *Model) insertUpdate(msg tea.Msg) tea.Cmd {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "esc":
+			return m.SetMode(ModeNormal)
+		case "ctrl+k":
+			m.col = clamp(m.col, 0, len(m.value[m.row]))
+			if m.col >= len(m.value[m.row]) {
+				m.mergeLineBelow(m.row)
+				break
+			}
+			m.deleteAfterCursor()
+		case "ctrl+u":
+			m.col = clamp(m.col, 0, len(m.value[m.row]))
+			if m.col <= 0 {
+				m.mergeLineAbove(m.row)
+				break
+			}
+			m.deleteBeforeCursor()
+		case "backspace", "ctrl+h":
+			m.col = clamp(m.col, 0, len(m.value[m.row]))
+			if m.col <= 0 {
+				m.mergeLineAbove(m.row)
+				break
+			}
+			if len(m.value[m.row]) > 0 {
+				m.value[m.row] = append(m.value[m.row][:max(0, m.col-1)], m.value[m.row][m.col:]...)
+				if m.col > 0 {
+					m.SetCursor(m.col - 1)
+				}
+			}
+		case "delete", "ctrl+d":
+			if len(m.value[m.row]) > 0 && m.col < len(m.value[m.row]) {
+				m.value[m.row] = append(m.value[m.row][:m.col], m.value[m.row][m.col+1:]...)
+			}
+			if m.col >= len(m.value[m.row]) {
+				m.mergeLineBelow(m.row)
+				break
+			}
+		case "alt+backspace", "ctrl+w":
+			if m.col <= 0 {
+				m.mergeLineAbove(m.row)
+				break
+			}
+			m.deleteWordLeft()
+		case "alt+delete", "alt+d":
+			m.col = clamp(m.col, 0, len(m.value[m.row]))
+			if m.col >= len(m.value[m.row]) {
+				m.mergeLineBelow(m.row)
+				break
+			}
+			m.deleteWordRight()
+		case "enter", "ctrl+m":
+			if len(m.value) >= maxHeight {
+				return nil
+			}
+			m.col = clamp(m.col, 0, len(m.value[m.row]))
+			m.splitLine(m.row, m.col)
+		case "end", "ctrl+e":
+			m.CursorEnd()
+		case "home", "ctrl+a":
+			m.CursorStart()
+		case "right", "ctrl+f":
+			if m.col < len(m.value[m.row]) {
+				m.SetCursor(m.col + 1)
+			} else {
+				if m.row < len(m.value)-1 {
+					m.row++
+					m.CursorStart()
+				}
+			}
+		case "down", "ctrl+n":
+			m.CursorDown()
+		case "alt+right", "alt+f":
+			m.wordRight()
+		case "ctrl+v":
+			return Paste
+		case "left", "ctrl+b":
+			if m.col == 0 && m.row != 0 {
+				m.row--
+				m.CursorEnd()
+				break
+			}
+			if m.col > 0 {
+				m.SetCursor(m.col - 1)
+			}
+		case "up", "ctrl+p":
+			m.CursorUp()
+		case "alt+left", "alt+b":
+			m.wordLeft()
+		default:
+			if m.CharLimit > 0 && rw.StringWidth(m.Value()) >= m.CharLimit {
+				break
+			}
+
+			m.col = min(m.col, len(m.value[m.row]))
+			m.value[m.row] = append(m.value[m.row][:m.col], append(msg.Runes, m.value[m.row][m.col:]...)...)
+			m.SetCursor(m.col + len(msg.Runes))
+		}
+
+	case pasteMsg:
+		m.handlePaste(string(msg))
+
+	case pasteErrMsg:
+		m.Err = msg
+	}
+
+	return nil
+}
diff --git a/textarea/modal.go b/textarea/modal.go
new file mode 100644
index 0000000..8edf8c4
--- /dev/null
+++ b/textarea/modal.go
@@ -0,0 +1,75 @@
+package textarea
+
+import (
+	"github.com/charmbracelet/bubbles/cursor"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+// Mode is the possible modes of the textarea for modal editing.
+type Mode string
+
+const (
+	// ModeNormal is the normal mode for navigating around text.
+	ModeNormal Mode = "normal"
+	// ModeInsert is the insert mode for inserting text.
+	ModeInsert Mode = "insert"
+)
+
+// SetMode sets the mode of the textarea.
+func (m *Model) SetMode(mode Mode) tea.Cmd {
+	switch mode {
+	case ModeInsert:
+		m.mode = ModeInsert
+		return m.Cursor.SetCursorMode(cursor.CursorBlink)
+	case ModeNormal:
+		m.mode = ModeNormal
+		return m.Cursor.SetCursorMode(cursor.CursorStatic)
+	}
+	return nil
+}
+
+// Action is the type of action that will be performed when the user completes
+// a key combination.
+type Action int
+
+const (
+	// ActionMove moves the cursor.
+	ActionMove Action = iota
+	// ActionSeek seeks the cursor to the desired character.
+	// Used in conjunction with f/F/t/T.
+	ActionSeek
+	// ActionReplace replaces text.
+	ActionReplace
+	// ActionDelete deletes text.
+	ActionDelete
+	// ActionYank yanks text.
+	ActionYank
+)
+
+// Position is a (row, column) pair representing a position of the cursor or
+// any character.
+type Position struct {
+	Row int
+	Col int
+}
+
+// Range is a range of characters in the text area.
+type Range struct {
+	Start Position
+	End   Position
+}
+
+// NormalCommand is a helper for keeping track of the various relevant information
+// when performing vim motions in the textarea.
+type NormalCommand struct {
+	// Buffer is the buffer of keys that have been press for the current
+	// command.
+	Buffer string
+	// Count is the number of times to replay the action. This is usually
+	// optional and defaults to 1.
+	Count int
+	// Action is the action to be performed.
+	Action Action
+	// Range is the range of characters to perform the action on.
+	Range Range
+}
diff --git a/textarea/normal.go b/textarea/normal.go
new file mode 100644
index 0000000..a9fec1f
--- /dev/null
+++ b/textarea/normal.go
@@ -0,0 +1,150 @@
+package textarea
+
+import (
+	"strconv"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+func (m *Model) normalUpdate(msg tea.Msg) tea.Cmd {
+	var cmd tea.Cmd
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "esc":
+			m.command = &NormalCommand{}
+		case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
+			v := m.command.Buffer + msg.String()
+			count, err := strconv.Atoi(v)
+			if err != nil {
+				count, _ = strconv.Atoi(msg.String())
+				m.command = &NormalCommand{Buffer: msg.String(), Count: count}
+			} else {
+				m.command = &NormalCommand{Buffer: v, Count: count}
+			}
+		case "G":
+			var row int
+			if m.command.Count > 0 {
+				row = m.command.Count - 1
+			} else {
+				row = len(m.value) - 1
+			}
+			m.row = clamp(row, 0, len(m.value)-1)
+			return nil
+		case "g":
+			if m.command.Buffer == "g" {
+				m.command = &NormalCommand{}
+				m.row = clamp(m.command.Count-1, 0, len(m.value)-1)
+			} else {
+				m.command = &NormalCommand{Buffer: "g"}
+			}
+			return nil
+		case "d":
+			if m.command.Action == ActionDelete {
+				for i := 0; i < max(m.command.Count, 1); i++ {
+					m.CursorStart()
+					m.deleteAfterCursor()
+					m.mergeLineBelow(m.row)
+				}
+				m.command = &NormalCommand{}
+				break
+			}
+			m.command.Action = ActionDelete
+		case "y":
+			m.command.Action = ActionYank
+		case "r":
+			m.command.Action = ActionReplace
+		case "i":
+			return m.SetMode(ModeInsert)
+		case "I":
+			m.CursorStart()
+			return m.SetMode(ModeInsert)
+		case "a":
+			m.SetCursor(m.col + 1)
+			return m.SetMode(ModeInsert)
+		case "A":
+			m.CursorEnd()
+			return m.SetMode(ModeInsert)
+		case "^":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row, 0},
+			}
+		case "$":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row, len(m.value[m.row]) - 1},
+			}
+		case "e", "E":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   m.findWordEnd(m.command.Count, msg.String() == "E"),
+			}
+		case "w", "W":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   m.findWordStart(m.command.Count, msg.String() == "W"),
+			}
+		case "b", "B":
+			direction := -1
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   m.findWordStart(direction*m.command.Count, msg.String() == "B"),
+			}
+		case "h":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row, m.col - max(m.command.Count, 1)},
+			}
+		case "j":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row + max(m.command.Count, 1), m.col},
+			}
+		case "k":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row - max(m.command.Count, 1), m.col},
+			}
+		case "l":
+			m.command.Range = Range{
+				Start: Position{m.row, m.col},
+				End:   Position{m.row, m.col + max(m.command.Count, 1)},
+			}
+		case "J":
+			m.CursorEnd()
+			m.mergeLineBelow(m.row)
+			return nil
+		case "p":
+			cmd = Paste
+		}
+
+		switch msg.String() {
+		case "i", "I", "a", "A", "e", "w", "W", "b", "B", "h", "j", "k", "l", "p", "$", "^":
+			switch m.command.Action {
+			case ActionDelete:
+				m.deleteRange(m.command.Range)
+			case ActionMove:
+				rowDelta := m.command.Range.End.Row - m.command.Range.Start.Row
+				if rowDelta > 0 {
+					for i := 0; i < rowDelta; i++ {
+						m.CursorDown()
+					}
+				} else if rowDelta < 0 {
+					for i := 0; i < -rowDelta; i++ {
+						m.CursorUp()
+					}
+				} else {
+					m.SetCursor(m.command.Range.End.Col)
+				}
+			}
+			m.command = &NormalCommand{}
+		}
+
+	case pasteMsg:
+		m.handlePaste(string(msg))
+	}
+
+	return cmd
+}
diff --git a/textarea/textarea.go b/textarea/textarea.go
index 12f31a4..5667f58 100644
--- a/textarea/textarea.go
+++ b/textarea/textarea.go
@@ -2,7 +2,6 @@ package textarea
 
 import (
 	"fmt"
-	"strconv"
 	"strings"
 	"unicode"
 
@@ -24,16 +23,6 @@ const (
 	maxWidth         = 500
 )
 
-// Mode is the possible modes of the textarea for modal editing.
-type Mode string
-
-const (
-	// ModeNormal is the normal mode for navigating around text.
-	ModeNormal Mode = "normal"
-	// ModeInsert is the insert mode for inserting text.
-	ModeInsert Mode = "insert"
-)
-
 // Internal messages for clipboard operations.
 type pasteMsg string
 type pasteErrMsg struct{ error }
@@ -63,52 +52,6 @@ type LineInfo struct {
 	CharOffset int
 }
 
-// Action is the type of action that will be performed when the user completes
-// a key combination.
-type Action int
-
-const (
-	// ActionMove moves the cursor.
-	ActionMove Action = iota
-	// ActionSeek seeks the cursor to the desired character.
-	// Used in conjunction with f/F/t/T.
-	ActionSeek
-	// ActionReplace replaces text.
-	ActionReplace
-	// ActionDelete deletes text.
-	ActionDelete
-	// ActionYank yanks text.
-	ActionYank
-)
-
-// Position is a (row, column) pair representing a position of the cursor or
-// any character.
-type Position struct {
-	Row int
-	Col int
-}
-
-// Range is a range of characters in the text area.
-type Range struct {
-	Start Position
-	End   Position
-}
-
-// NormalCommand is a helper for keeping track of the various relevant information
-// when performing vim motions in the textarea.
-type NormalCommand struct {
-	// Buffer is the buffer of keys that have been press for the current
-	// command.
-	Buffer string
-	// Count is the number of times to replay the action. This is usually
-	// optional and defaults to 1.
-	Count int
-	// Action is the action to be performed.
-	Action Action
-	// Range is the range of characters to perform the action on.
-	Range Range
-}
-
 // Style that will be applied to the text area.
 //
 // Style can be applied to focused and unfocused states to change the styles
@@ -790,264 +733,7 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	return m, tea.Batch(cmds...)
 }
 
-// SetMode sets the mode of the textarea.
-func (m *Model) SetMode(mode Mode) tea.Cmd {
-	switch mode {
-	case ModeInsert:
-		m.mode = ModeInsert
-		return m.Cursor.SetCursorMode(cursor.CursorBlink)
-	case ModeNormal:
-		m.mode = ModeNormal
-		return m.Cursor.SetCursorMode(cursor.CursorStatic)
-	}
-	return nil
-}
-
-func (m *Model) normalUpdate(msg tea.Msg) tea.Cmd {
-	var cmd tea.Cmd
-
-	switch msg := msg.(type) {
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "esc":
-			m.command = &NormalCommand{}
-		case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
-			v := m.command.Buffer + msg.String()
-			count, err := strconv.Atoi(v)
-			if err != nil {
-				count, _ = strconv.Atoi(msg.String())
-				m.command = &NormalCommand{Buffer: msg.String(), Count: count}
-			} else {
-				m.command = &NormalCommand{Buffer: v, Count: count}
-			}
-		case "G":
-			var row int
-			if m.command.Count > 0 {
-				row = m.command.Count - 1
-			} else {
-				row = len(m.value) - 1
-			}
-			m.row = clamp(row, 0, len(m.value)-1)
-			return nil
-		case "g":
-			if m.command.Buffer == "g" {
-				m.command = &NormalCommand{}
-				m.row = clamp(m.command.Count-1, 0, len(m.value)-1)
-			} else {
-				m.command = &NormalCommand{Buffer: "g"}
-			}
-			return nil
-		case "d":
-			if m.command.Action == ActionDelete {
-				for i := 0; i < m.command.Count; i++ {
-					m.CursorStart()
-					m.deleteAfterCursor()
-					m.mergeLineBelow(m.row)
-				}
-				m.command = &NormalCommand{}
-				break
-			}
-			m.command.Action = ActionDelete
-		case "y":
-			m.command.Action = ActionYank
-		case "r":
-			m.command.Action = ActionReplace
-		case "i":
-			return m.SetMode(ModeInsert)
-		case "I":
-			m.CursorStart()
-			return m.SetMode(ModeInsert)
-		case "a":
-			m.SetCursor(m.col + 1)
-			return m.SetMode(ModeInsert)
-		case "A":
-			m.CursorEnd()
-			return m.SetMode(ModeInsert)
-		case "^":
-			m.CursorStart()
-			return nil
-		case "$":
-			m.CursorEnd()
-			return nil
-		case "e", "E":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   m.findWordEnd(m.command.Count, msg.String() == "E"),
-			}
-		case "w", "W":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   m.findWordStart(m.command.Count, msg.String() == "W"),
-			}
-		case "b", "B":
-			direction := -1
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   m.findWordStart(direction*m.command.Count, msg.String() == "B"),
-			}
-		case "h":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   Position{m.row, m.col - max(m.command.Count, 1)},
-			}
-		case "j":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   Position{m.row + max(m.command.Count, 1), m.col},
-			}
-		case "k":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   Position{m.row - max(m.command.Count, 1), m.col},
-			}
-		case "l":
-			m.command.Range = Range{
-				Start: Position{m.row, m.col},
-				End:   Position{m.row, m.col + max(m.command.Count, 1)},
-			}
-		case "J":
-			m.CursorEnd()
-			m.mergeLineBelow(m.row)
-			return nil
-		case "p":
-			cmd = Paste
-		}
-
-		switch msg.String() {
-		case "i", "I", "a", "A", "e", "w", "W", "b", "B", "h", "j", "k", "l", "p":
-			if m.command.Action == ActionMove {
-				rowDelta := m.command.Range.End.Row - m.command.Range.Start.Row
-				if rowDelta > 0 {
-					for i := 0; i < rowDelta; i++ {
-						m.CursorDown()
-					}
-				} else if rowDelta < 0 {
-					for i := 0; i < -rowDelta; i++ {
-						m.CursorUp()
-					}
-				} else {
-					m.SetCursor(m.command.Range.End.Col)
-				}
-			}
-			m.command = &NormalCommand{}
-		}
-
-	case pasteMsg:
-		m.handlePaste(string(msg))
-	}
-
-	return cmd
-}
-
-func (m *Model) insertUpdate(msg tea.Msg) tea.Cmd {
-	switch msg := msg.(type) {
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "esc":
-			return m.SetMode(ModeNormal)
-		case "ctrl+k":
-			m.col = clamp(m.col, 0, len(m.value[m.row]))
-			if m.col >= len(m.value[m.row]) {
-				m.mergeLineBelow(m.row)
-				break
-			}
-			m.deleteAfterCursor()
-		case "ctrl+u":
-			m.col = clamp(m.col, 0, len(m.value[m.row]))
-			if m.col <= 0 {
-				m.mergeLineAbove(m.row)
-				break
-			}
-			m.deleteBeforeCursor()
-		case "backspace", "ctrl+h":
-			m.col = clamp(m.col, 0, len(m.value[m.row]))
-			if m.col <= 0 {
-				m.mergeLineAbove(m.row)
-				break
-			}
-			if len(m.value[m.row]) > 0 {
-				m.value[m.row] = append(m.value[m.row][:max(0, m.col-1)], m.value[m.row][m.col:]...)
-				if m.col > 0 {
-					m.SetCursor(m.col - 1)
-				}
-			}
-		case "delete", "ctrl+d":
-			if len(m.value[m.row]) > 0 && m.col < len(m.value[m.row]) {
-				m.value[m.row] = append(m.value[m.row][:m.col], m.value[m.row][m.col+1:]...)
-			}
-			if m.col >= len(m.value[m.row]) {
-				m.mergeLineBelow(m.row)
-				break
-			}
-		case "alt+backspace", "ctrl+w":
-			if m.col <= 0 {
-				m.mergeLineAbove(m.row)
-				break
-			}
-			m.deleteWordLeft()
-		case "alt+delete", "alt+d":
-			m.col = clamp(m.col, 0, len(m.value[m.row]))
-			if m.col >= len(m.value[m.row]) {
-				m.mergeLineBelow(m.row)
-				break
-			}
-			m.deleteWordRight()
-		case "enter", "ctrl+m":
-			if len(m.value) >= maxHeight {
-				return nil
-			}
-			m.col = clamp(m.col, 0, len(m.value[m.row]))
-			m.splitLine(m.row, m.col)
-		case "end", "ctrl+e":
-			m.CursorEnd()
-		case "home", "ctrl+a":
-			m.CursorStart()
-		case "right", "ctrl+f":
-			if m.col < len(m.value[m.row]) {
-				m.SetCursor(m.col + 1)
-			} else {
-				if m.row < len(m.value)-1 {
-					m.row++
-					m.CursorStart()
-				}
-			}
-		case "down", "ctrl+n":
-			m.CursorDown()
-		case "alt+right", "alt+f":
-			m.wordRight()
-		case "ctrl+v":
-			return Paste
-		case "left", "ctrl+b":
-			if m.col == 0 && m.row != 0 {
-				m.row--
-				m.CursorEnd()
-				break
-			}
-			if m.col > 0 {
-				m.SetCursor(m.col - 1)
-			}
-		case "up", "ctrl+p":
-			m.CursorUp()
-		case "alt+left", "alt+b":
-			m.wordLeft()
-		default:
-			if m.CharLimit > 0 && rw.StringWidth(m.Value()) >= m.CharLimit {
-				break
-			}
-
-			m.col = min(m.col, len(m.value[m.row]))
-			m.value[m.row] = append(m.value[m.row][:m.col], append(msg.Runes, m.value[m.row][m.col:]...)...)
-			m.SetCursor(m.col + len(msg.Runes))
-		}
-
-	case pasteMsg:
-		m.handlePaste(string(msg))
-
-	case pasteErrMsg:
-		m.Err = msg
-	}
-
-	return nil
+func (m *Model) deleteRange(r Range) {
 }
 
 // View renders the text area in its current state.