edit

package module
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 Go to latest Published: Feb 2, 2022 License: Apache-2.0 Imports: 16 Imported by: 2

README

edit

A text editor library PoC based on tcell, supporting Lua scripting

cmd/edit has an example of an editor built with it.

Documentation

Index

Constants

View Source 
const (
	ColorBlack   = tcell.ColorBlack
	ColorMaroon  = tcell.ColorMaroon
	ColorGreen   = tcell.ColorGreen
	ColorOlive   = tcell.ColorOlive
	ColorNavy    = tcell.ColorNavy
	ColorPurple  = tcell.ColorPurple
	ColorTeal    = tcell.ColorTeal
	ColorSilver  = tcell.ColorSilver
	ColorGray    = tcell.ColorGray
	ColorRed     = tcell.ColorRed
	ColorLime    = tcell.ColorLime
	ColorYellow  = tcell.ColorYellow
	ColorBlue    = tcell.ColorBlue
	ColorFuchsia = tcell.ColorFuchsia
	ColorAqua    = tcell.ColorAqua
	ColorWhite   = tcell.ColorWhite
)

Variables

View Source 
var DefaultStyle = tcell.StyleDefault

Functions

func CmdCarriageReturn 

func CmdCarriageReturn(w *Window)

func CmdCursorDown 

func CmdCursorDown(w *Window)

func CmdCursorLeft 

func CmdCursorLeft(w *Window)

func CmdCursorRight 

func CmdCursorRight(w *Window)

func CmdCursorUp 

func CmdCursorUp(w *Window)

func CmdDeletePrevRune 

func CmdDeletePrevRune(w *Window)

func CmdMoveToLineEnd 

func CmdMoveToLineEnd(w *Window)

func CmdMoveToLineStart 

func CmdMoveToLineStart(w *Window)

func CmdPageDown 

func CmdPageDown(w *Window)

func CmdPageUp 

func CmdPageUp(w *Window)

func CmdQuit 

func CmdQuit(w *Window)

func CmdSaveBuffer 

func CmdSaveBuffer(w *Window)

func CmdScrollDown 

func CmdScrollDown(w *Window)

func CmdScrollUp 

func CmdScrollUp(w *Window)

Types

type Action 

type Action func(win *Window)

func CmdInsertRune 

func CmdInsertRune(r rune) Action

func CmdMouseButtonUp 

func CmdMouseButtonUp(pos Position) Action

func CmdMouseDrag 

func CmdMouseDrag(pos Position) Action

func CmdMoveButtonDown 

func CmdMoveButtonDown(pos Position) Action

func CmdPasteString 

func CmdPasteString(s string) Action

func CmdResize 

func CmdResize(w, h int) Action

type ActionMaker 

type ActionMaker func([]interface{}) Action

func SimpleActionMaker 

func SimpleActionMaker(f Action) ActionMaker

type App 

type App struct {
	// contains filtered or unexported fields
}

func NewApp 

func NewApp(win *Window) *App

func (*App) BindEvents 

func (a *App) BindEvents(name, seq string, f runtime.Value) error

func (*App) CommandInput 

func (a *App) CommandInput()

func (*App) CopyToClipboard 

func (a *App) CopyToClipboard(s string) error

func (*App) Draw 

func (a *App) Draw(screen *Screen)

func (*App) GetEventHandler 

func (a *App) GetEventHandler(name string) *EventHandler

func (*App) HandleEvent 

func (a *App) HandleEvent(evt Event)

func (*App) InitLuaCode 

func (a *App) InitLuaCode(initfile string, luaCode []byte) error

func (*App) InitLuaFile 

func (a *App) InitLuaFile(initfile string) error

func (*App) Log 

func (a *App) Log(msg string)

func (*App) Logf 

func (a *App) Logf(format string, args ...interface{})

func (*App) LuaActionMaker 

func (a *App) LuaActionMaker(f runtime.Value) ActionMaker

func (*App) Quit 

func (a *App) Quit()

func (*App) Resize 

func (a *App) Resize(w, h int)

func (*App) Running 

func (a *App) Running() bool

func (*App) SwitchWindow 

func (a *App) SwitchWindow()

func (*App) UnbindEvents 

func (a *App) UnbindEvents(name, seq string) error

func (*App) Write 

func (a *App) Write(p []byte) (int, error)

type ArgType 

type ArgType interface {
	FromString() interface{}
}

type Buffer 

type Buffer interface {
	LineCount() int
	GetLine(l, c int) (Line, error)
	InsertRune(r rune, l, c int) error
	InsertString(s string, l, c int) (int, int, error)
	InsertLine(l int, line Line) error
	DeleteLine(l int) error
	MergeLineWithPrevious(l int) error
	SplitLine(l, c int) error
	DeleteRuneAt(l, c int) error
	AdvancePos(l, c, dl, dc int) (int, int)
	EndPos() (int, int)
	AppendLine(Line)
	Save() error
	StyledLineIter(l, c int) StyledLineIter
	Kind() string
	StringFromRegion(l0, c0, l1, c1 int) (string, error)
}

type Command 

type Command struct {
	Name        string
	Description string
	Parameters  []Parameter
	Action      CommandAction
}

type CommandAction 

type CommandAction interface {
	Apply(w *App)
}

type Event 

type Event struct {
	EventType
	KeyData
	Rune rune
	Modifiers
	MouseData
	Size
	PasteString string
}

func (Event) Name 

func (e Event) Name() string

type EventHandler 

type EventHandler struct {
	// contains filtered or unexported fields
}

func NewEventHandler 

func NewEventHandler() *EventHandler

func (*EventHandler) HandleEvent 

func (h *EventHandler) HandleEvent(evt Event) (Action, error)

HandleEvent transitions the state of the event handler and returns any action that may be triggered.

func (*EventHandler) RegisterAction 

func (h *EventHandler) RegisterAction(seq string, action ActionMaker) error

RegisterAction associates the given action with the event sequence represented by seq. E.g. RegisterAction("x y z", action) will create the following transitions:

"" -x-> x x -y-> x:y x:y -z-> x:y:z

It will also record that the state x:y:z triggers action x:y:z triggers action

func (*EventHandler) Reset 

func (h *EventHandler) Reset()

Reset the handler so any ongoing sequence is aborted.

func (*EventHandler) UnregisterAction 

func (h *EventHandler) UnregisterAction(seq string) error

type EventType 

type EventType int
const (
	NoEvent EventType = iota
	Rune
	Key
	Mouse
	Resize
	Paste
)

func (EventType) Name 

func (t EventType) Name() string

type FileBuffer 

type FileBuffer struct {
	// contains filtered or unexported fields
}

A FileBuffer maintains the data for a file.

func NewBufferFromFile 

func NewBufferFromFile(filename string) *FileBuffer

func NewEmptyFileBuffer 

func NewEmptyFileBuffer() *FileBuffer

func (*FileBuffer) AdvancePos 

func (b *FileBuffer) AdvancePos(l, c, dl, dc int) (int, int)

func (*FileBuffer) AppendLine 

func (b *FileBuffer) AppendLine(line Line)

func (*FileBuffer) DeleteLine 

func (b *FileBuffer) DeleteLine(l int) error

func (*FileBuffer) DeleteRuneAt 

func (b *FileBuffer) DeleteRuneAt(l, c int) error

func (*FileBuffer) EndPos 

func (b *FileBuffer) EndPos() (int, int)

func (*FileBuffer) GetLine 

func (b *FileBuffer) GetLine(l, c int) (Line, error)

func (*FileBuffer) InsertLine 

func (b *FileBuffer) InsertLine(l int, line Line) error

func (*FileBuffer) InsertRune 

func (b *FileBuffer) InsertRune(r rune, l, c int) error

func (*FileBuffer) InsertString 

func (b *FileBuffer) InsertString(s string, l, c int) (int, int, error)

func (*FileBuffer) Kind 

func (b *FileBuffer) Kind() string

func (*FileBuffer) Line 

func (b *FileBuffer) Line(l int) Line

func (*FileBuffer) LineCount 

func (b *FileBuffer) LineCount() int

func (*FileBuffer) MergeLineWithPrevious 

func (b *FileBuffer) MergeLineWithPrevious(l int) error

func (*FileBuffer) NearestPos 

func (b *FileBuffer) NearestPos(l, c int) (int, int)

func (*FileBuffer) Save 

func (b *FileBuffer) Save() error

func (*FileBuffer) SetLine 

func (b *FileBuffer) SetLine(l int, line Line) error

func (*FileBuffer) SplitLine 

func (b *FileBuffer) SplitLine(l, c int) error

func (*FileBuffer) StringFromRegion 

func (b *FileBuffer) StringFromRegion(l0, c0, l1, c1 int) (string, error)

func (*FileBuffer) StyledLineIter 

func (b *FileBuffer) StyledLineIter(l, c int) StyledLineIter

func (*FileBuffer) Truncate 

func (b *FileBuffer) Truncate(count int)

type ILine 

type ILine interface {
	Len() int
	InsertRune(r rune, c int) ILine
	DeleteAt(c int) Line
	MergeWith(l2 ILine) ILine
	String() string
	Iter(c int) LineIter
}

type Invocation 

type Invocation struct {
	*Command
	Arguments []interface{}
}

type KeyData 

type KeyData tcell.Key

type Line 

type Line struct {
	Runes []rune
	Meta  interface{}
}

func NewLineFromString 

func NewLineFromString(s string, meta interface{}) Line

func (Line) DeleteAt 

func (l Line) DeleteAt(c int) Line

func (Line) InsertRune 

func (l Line) InsertRune(r rune, c int) Line

func (Line) InsertString 

func (l Line) InsertString(s string, c int) Line

s must not contain a '\n'

func (Line) Iter 

func (l Line) Iter(c int) LineIter

func (Line) Len 

func (l Line) Len() int

func (Line) MergeWith 

func (l Line) MergeWith(l2 Line) Line

func (Line) SplitAt 

func (l Line) SplitAt(c int) (Line, Line)

func (Line) String 

func (l Line) String() string

type LineIter 

type LineIter interface {
	Next() rune
	HasNext() bool
}

type Modifiers 

type Modifiers int
const (
	Shift Modifiers = 1 << iota
	Control
	Alt
	Meta
)

type MouseButtons 

type MouseButtons int
const (
	Button1 MouseButtons = 1 << iota
	Button2
	Button3
	WheelDown
	WheelUp
	WheelLeft
	WheelRight
)

func (MouseButtons) Empty 

func (mb MouseButtons) Empty() bool

func (MouseButtons) Has 

func (mb MouseButtons) Has(mb1 MouseButtons) bool

func (MouseButtons) Name 

func (mb MouseButtons) Name() string

type MouseData 

type MouseData struct {
	Position
	Buttons         MouseButtons
	ButtonsPressed  MouseButtons
	ButtonsReleased MouseButtons
}

type Parameter 

type Parameter struct {
	Name        string
	Description string
	Type        ArgType
}

type Position 

type Position struct {
	X, Y int
}

func (Position) MoveBy 

func (p Position) MoveBy(q Position) Position

func (Position) MoveByX 

func (p Position) MoveByX(x int) Position

type Printer 

type Printer struct {
	Offset   int
	TabWidth int
}

A Printer knows how to print lines on a screen

func (Printer) LineCol 

func (p Printer) LineCol(l Line, i int) int

func (Printer) LineIndex 

func (p Printer) LineIndex(l Line, targetCol int) int

func (Printer) Print 

func (lp Printer) Print(s ScreenWriter, p Position, iter StyledLineIter)

Print the line to the screen starting at coordinates (p.X, p.Y)

type Rectangle 

type Rectangle struct {
	Position
	Size
}

func (Rectangle) BottomRight 

func (r Rectangle) BottomRight() Position

func (Rectangle) Intersect 

func (r Rectangle) Intersect(s Rectangle) Rectangle

type Screen 

type Screen struct {
	// contains filtered or unexported fields
}

func NewScreen 

func NewScreen() (*Screen, error)

func (*Screen) Cleanup 

func (s *Screen) Cleanup()

func (*Screen) Fill 

func (s *Screen) Fill(c rune)

func (*Screen) PollEvent 

func (s *Screen) PollEvent() Event

func (*Screen) Reverse 

func (s *Screen) Reverse(p Position)

func (*Screen) SetRune 

func (s *Screen) SetRune(p Position, c rune, style tcell.Style)

func (*Screen) Show 

func (s *Screen) Show()

func (*Screen) Size 

func (s *Screen) Size() Size

func (*Screen) SubScreen 

func (s *Screen) SubScreen(rect Rectangle) ScreenWriter

type ScreenWriter 

type ScreenWriter interface {
	Size() Size
	SetRune(Position, rune, tcell.Style)
	Reverse(Position)
	SubScreen(Rectangle) ScreenWriter
}

type Size 

type Size struct {
	W, H int
}

func (Size) Contains 

func (s Size) Contains(p Position) bool

type Style 

type Style = tcell.Style

type StyledLineIter 

type StyledLineIter interface {
	Next() (rune, Style)
	HasNext() bool
}

func NewConstStyleLineIter 

func NewConstStyleLineIter(iter LineIter, style Style) StyledLineIter

type SubScreen 

type SubScreen struct {
	// contains filtered or unexported fields
}

func (SubScreen) Reverse 

func (s SubScreen) Reverse(p Position)

func (SubScreen) SetRune 

func (s SubScreen) SetRune(p Position, c rune, style tcell.Style)

func (SubScreen) Size 

func (s SubScreen) Size() Size

func (SubScreen) SubScreen 

func (s SubScreen) SubScreen(rect Rectangle) ScreenWriter

type TcellEventConverter 

type TcellEventConverter struct {
	// contains filtered or unexported fields
}

func (*TcellEventConverter) EventFromTcell 

func (c *TcellEventConverter) EventFromTcell(tcevt tcell.Event) Event

type Window 

type Window struct {
	// contains filtered or unexported fields
}

A Window is a view to a buffer. It maintains a cursor position, and a rectangle view into the buffer.

func NewWindow 

func NewWindow(buf Buffer) *Window

func (*Window) App 

func (w *Window) App() *App

func (*Window) Buffer 

func (w *Window) Buffer() Buffer

func (*Window) CurrentLine 

func (w *Window) CurrentLine() (Line, error)

CurrentLine returns the line the cursor is on currently.

func (*Window) CursorLine 

func (w *Window) CursorLine() int

func (*Window) CursorPos 

func (w *Window) CursorPos() (int, int)

func (*Window) DeleteRune 

func (w *Window) DeleteRune() (err error)

DeleteRune deletes the character to the left of the cursor position.

func (*Window) Draw 

func (w *Window) Draw(screen ScreenWriter)

Draw draws the contents of the window on the screen.

func (*Window) DrawCursor 

func (w *Window) DrawCursor(screen ScreenWriter)

DrawCursor highlights the cursor if it is visible.

func (*Window) FocusCursor 

func (w *Window) FocusCursor(screen ScreenWriter)

FocusCursor adjusts the visible rectangle of the window if necessary to make the cursor visible.

func (*Window) GetHighlightedString 

func (w *Window) GetHighlightedString() (string, error)

func (*Window) GetLineCol 

func (w *Window) GetLineCol(x, y int) (int, int)

func (*Window) HandleEvent 

func (w *Window) HandleEvent(evt Event) (Action, error)

func (*Window) InsertRune 

func (w *Window) InsertRune(r rune)

InsertRune inserts a character into the buffer at the cursor position.

func (*Window) MoveCursor 

func (w *Window) MoveCursor(dl, dc int)

MoveCursor moves the cursor by a number of lines and columns.

func (*Window) MoveCursorTo 

func (w *Window) MoveCursorTo(x, y int)

MoveCursorTo moves the cursor to a given screen position.

func (*Window) MoveCursorToEnd 

func (w *Window) MoveCursorToEnd()

func (*Window) MoveCursorToLineEnd 

func (w *Window) MoveCursorToLineEnd()

MoveCursorToLineEnd moves the cursor to the end of the current line.

func (*Window) MoveCursorToLineStart 

func (w *Window) MoveCursorToLineStart()

MoveCursorToLineStart moves the cursor to the start of the current line.

func (*Window) MoveHighlightRegion 

func (w *Window) MoveHighlightRegion(x, y int)

func (*Window) PageDown 

func (w *Window) PageDown(n int)

PageDown moves the cursor down by n pages (or up by -n pages if n < 0).

func (*Window) PasteString 

func (w *Window) PasteString(s string) (err error)

func (*Window) RegisterWithApp 

func (w *Window) RegisterWithApp(app *App)

func (*Window) ResetHighlightRegion 

func (w *Window) ResetHighlightRegion()

func (*Window) Resize 

func (w *Window) Resize(width, height int)

Resize changes the size of the window.

func (*Window) ScrollDown 

func (w *Window) ScrollDown(n int)

ScrollDown scrolls down by n lines, attempting to keep the cursor on the same buffer line.

func (*Window) ScrollUp 

func (w *Window) ScrollUp(n int)

ScrollUp scrolls up by n lines, attempting to keep the cursor on the same buffer line.

func (*Window) SplitLine 

func (w *Window) SplitLine(move bool) error

SplitLine splits the current line at the cursor position. If move is true, the cursor is moved down otherwise it stays in the same position.

func (*Window) StartHighlightRegion 

func (w *Window) StartHighlightRegion(x, y int)

func (*Window) StopHightlightRegion 

func (w *Window) StopHightlightRegion(x, y int) bool

func (*Window) StyledLineIter 

func (w *Window) StyledLineIter(l, c int) StyledLineIter

Source Files

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Directories

Path Synopsis
cmd
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