core

type Action interface {
	Run()
}

type ActionDispatcher interface {
	Dispatch(action Action)
	Flush()
	Shutdown()
	Start()
}

type AddCrLfTransformer struct{}

type Backend interface {
	// SrcLoc returns the location of the original data.
	SrcLoc() string
	// BufferLoc is the location of the "copy" the backend works directly on.
	BufferLoc() string

	Insert(line, col int, text string) error
	Append(text string) error
	Remove(line1, col1, line2, col2 int) error

	LineCount() int

	// Save saves the edited data (BufferLoc) into the original (SrcLoc)
	Save(loc string) error

	SendBytes(data []byte)

	// Slice gets a region of text ("rectangle") as a runes matrix
	Slice(line1, col, line2, col2 int) *Slice

	// Close closes the backend resources.
	Close() error

	// ViewId returns the "unique" viewid given to this buffer.
	ViewId() int64

	// Completely clears the buffer text (empty document)
	Wipe()

	// Reloads the text (from SrcLoc to BufferLoc)
	Reload() error

	// return the color style at a specific location (mem backends)
	ColorAt(ln, col int) (fg, bg Style)

	//SourceMd5 or ts?
	//BufferMd5 or ts?
	SetVtCols(cols int)
	OnActivate()

	OffsetAt(ln, col int) int64
}

type Commander interface {
	Backspace()
	Clear()
	CursorMvmt(mvmt CursorMvmt)
	Delete()
	Insert(text string)
	NewLine()
}

type Config struct {
	SyntaxHighlighting bool
	Theme              string // ie: theme1.toml
	MaxCmdBufferLines  int    // Max # of lines to keep in buffer when running a command
	GuiFont            string // full path to a monospace TTF font
	GuiFontSize        int
	GuiFontDpi         int
	MinViewWidth       int // preferred minimum view width (in characters)
	LineWidthIndicator int // line width indicator (ie: 80 cols)
}

type CrLfEncoding struct {
	ChainWith encoding.Encoding
}

type CursorMvmt byte

type DropCrLfTransformer struct{}

type Editable interface {
	Commandbar() Commander
	CmdbarToggle()
	Config() Config
	CurViewId() int64
	DelColByIndex(col int, check bool)
	DelView(viewId int64, terminate bool)
	DelViewCheck(viewId int64, terminate bool)
	Dispatch(action Action)
	FileEvent(op FileOp, loc string)
	// CmdOn indicates whether the CommandBar is currently active
	CmdOn() bool
	// Open opens a file in the given view (new view if viewid<0)
	// create -> create file at loc if does not exist yet
	Open(loc string, viewId int64, rel string, create bool) (int64, error)
	Quit()
	QuitCheck() bool
	// Render updates the whole editor UI
	Render()
	Resize(h, w int)
	// SetStatusErr displays an error message in the status bar
	SetStatusErr(err string)
	// SetStatusErr displays a message in the status bar
	SetStatus(status string)
	SetCursor(y, x int)
	// SetCmdOn activates or desactives the CommandBar
	SetCmdOn(v bool)
	Size() (h, w int)
	StartTermView(args []string) int64
	SwapViews(v1, v2 int64)
	Start(locs []string)
	TermChar(y, x int, c rune)
	TermFB(fg, bg Style)
	TermFill(c rune, y1, x1, y2, x2 int)
	TermFlush()
	TermStr(y, x int, s string)
	TermStrv(y, x int, s string)
	Theme() *Theme
	ViewActivate(v int64)
	ViewAt(ln, col int) int64
	// ViewByLoc finds if there is an existing view for the given file (loc)
	ViewById(id int64) Viewable
	ViewsByLoc(loc string) []int64
	ViewIndex(id int64) (row, col int) // column, row **index** in the editor UI
	// Move a view
	ViewMove(y1, x1, y2, x2 int)
	// Navigate from a view to another
	ViewNavigate(mvmt CursorMvmt)
	Views() []int64 // list of all opened views
}

type FileOp uint32

type Highlighter interface {
	UpdateHighlights(v Viewable)
	ApplyHighlight(v Viewable, lnOffset, ln, col int)
}

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

type Rwsc interface {
	io.Reader
	io.Writer
	io.ReaderAt
	io.WriterAt
	io.Seeker
	io.Closer
}

type Selection struct {
	LineFrom, ColFrom int // selection start point
	LineTo, ColTo     int // selection end point (colto=-1 means whole lines)
}

type Slice struct {
	sync.RWMutex

	R1, C1, R2, C2 int //bounds
	// contains filtered or unexported fields
}

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

type StyledRune struct {
	Rune rune
	Fg   Style
	Bg   Style
}

type Term interface {
	Close()
	Clear(fg, bg Style)
	Char(y, x int, c rune, fg, bg Style)
	Flush()
	Init() error
	Listen()
	SetExtendedColors(bool)
	SetCursor(y, x int)
	Size() (y, x int)
}

type TextInfo struct {
	Enc encoding.Encoding
}

type Theme struct {
	Bg       Style // default to term bg
	Fg       Style // default to term fg
	BgSelect Style // default to term bg
	FgSelect Style // default to term fg
	BgCursor Style
	FgCursor Style

	Comment                            Style
	String                             Style
	Number                             Style
	Keyword1, Keyword2, Keyword3       Style
	Symbol1, Symbol2, Symbol3          Style
	Separator1, Separator2, Separator3 Style

	FileClean        StyledRune
	FileDirty        StyledRune
	Scrollbar        StyledRune
	ScrollTab        StyledRune
	Statusbar        StyledRune
	StatusbarText    Style
	StatusbarTextErr Style
	Cmdbar           StyledRune
	CmdbarText       Style
	CmdbarTextOn     Style
	Viewbar          StyledRune
	ViewbarText      Style
	MoreTextSide     StyledRune
	MoreTextUp       StyledRune
	MoreTextDown     StyledRune
	TabChar          StyledRune
	Margin           StyledRune
	Close            StyledRune
}

type ViewType int

type Viewable interface {
	Widget
	Backspace()
	Backend() Backend
	ClearSelections()
	Copy()
	CurCol() int
	CurLine() int
	CursorMvmt(mvmt CursorMvmt)
	Cut()
	Delete(row1, col1, row, col2 int, undoable bool)
	DeleteCur()
	Dirty() bool
	Id() int64
	Insert(row, col int, text string, undoable bool)
	InsertCur(text string)
	InsertNewLineCur()
	LastViewCol() int
	LastViewLine() int
	LineCount() int
	// LineRunesTo returns the number of raw runes to the given line column
	LineRunesTo(s *Slice, line, col int) int
	// MoveCursor moves the cursor by the y, x offsets (in runes)
	MoveCursor(y, x int)
	MoveCursorRoll(y, x int)
	OpenSelection(newView bool)
	Paste()
	// Reload reloads the view data from it's source (backend)
	Reload()
	// Reset reinitializes the view to it's startup state.
	Reset()
	Save() // Save from buffer to src
	ScrollPos() (ln, col int)
	SetBackend(backend Backend)
	SetDirty(bool)
	SelectAll()
	SelectWord(ln, col int)
	Selections() *[]Selection
	// SetAutoScroll is used to make the view scroll contonuously in y,x increments
	// keeps scrolling until x and y are set to 0.
	SetAutoScroll(y, x int, isSelect bool)
	SetCursorPos(y, x int)
	SetScrollPct(ypct int)
	SetScrollPos(y, x int)
	SetTitle(title string)
	SetViewType(t ViewType)
	SetVtCols(cols int)
	// Sets the view work directory, commands and "open" actions will be relative
	// to this path.
	SetWorkDir(dir string)
	// Slice returns a view's text subset (rectangle)
	Slice() *Slice
	StretchSelection(prevl, prevc, ln, c int)
	SyncSlice()
	Title() string
	Text(ln1, col1, ln2, col2 int) [][]rune
	Type() ViewType
	WorkDir() string
}

type Widget interface {
	// Get the widget bounds (within parent)
	Bounds() (y1, x1, y2, x2 int)
	// Get parent widget or nil if none
	GetParent() Widget
	// Render forces re-rendering the view UI.
	Render()
	// Set the widget bounds (within parent)
	SetBounds(y1, x1, y2, x2 int)
	// Set the parent, typically internal use only
	SetParent(w Widget)
}