mirror of https://github.com/liamg/aminal.git
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
package buffer
|
|
|
|
type TerminalState struct {
|
|
scrollLinesFromBottom uint
|
|
cursorX uint16
|
|
cursorY uint16
|
|
cursorAttr CellAttributes
|
|
defaultCell Cell
|
|
viewHeight uint16
|
|
viewWidth uint16
|
|
topMargin uint // see DECSTBM docs - this is for scrollable regions
|
|
bottomMargin uint // see DECSTBM docs - this is for scrollable regions
|
|
ReplaceMode bool // overwrite character at cursor or insert new
|
|
OriginMode bool // see DECOM docs - whether cursor is positioned within the margins or not
|
|
LineFeedMode bool
|
|
AutoWrap bool
|
|
maxLines uint64
|
|
tabStops map[uint16]struct{}
|
|
}
|
|
|
|
// NewTerminalMode creates a new terminal state
|
|
func NewTerminalState(viewCols uint16, viewLines uint16, attr CellAttributes, maxLines uint64) *TerminalState {
|
|
b := &TerminalState{
|
|
cursorX: 0,
|
|
cursorY: 0,
|
|
cursorAttr: attr,
|
|
AutoWrap: true,
|
|
defaultCell: Cell{attr: attr},
|
|
maxLines: maxLines,
|
|
viewWidth: viewCols,
|
|
viewHeight: viewLines,
|
|
topMargin: 0,
|
|
bottomMargin: uint(viewLines - 1),
|
|
}
|
|
b.TabReset()
|
|
return b
|
|
}
|
|
|
|
func (terminalState *TerminalState) SetVerticalMargins(top uint, bottom uint) {
|
|
terminalState.topMargin = top
|
|
terminalState.bottomMargin = bottom
|
|
}
|
|
|
|
// ResetVerticalMargins resets margins to extreme positions
|
|
func (terminalState *TerminalState) ResetVerticalMargins() {
|
|
terminalState.SetVerticalMargins(0, uint(terminalState.viewHeight-1))
|
|
}
|
|
|
|
func (terminalState *TerminalState) IsNewLineMode() bool {
|
|
return terminalState.LineFeedMode == false
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabZonk() {
|
|
terminalState.tabStops = make(map[uint16]struct{})
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabSet(index uint16) {
|
|
terminalState.tabStops[index] = struct{}{}
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabClear(index uint16) {
|
|
delete(terminalState.tabStops, index)
|
|
}
|
|
|
|
func (terminalState *TerminalState) getTabIndexFromCursor() uint16 {
|
|
index := terminalState.cursorX
|
|
if index == terminalState.viewWidth {
|
|
index = 0
|
|
}
|
|
return index
|
|
}
|
|
|
|
func (terminalState *TerminalState) IsTabSetAtCursor() bool {
|
|
index := terminalState.getTabIndexFromCursor()
|
|
_, ok := terminalState.tabStops[index]
|
|
return ok
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabClearAtCursor() {
|
|
terminalState.TabClear(terminalState.getTabIndexFromCursor())
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabSetAtCursor() {
|
|
terminalState.TabSet(terminalState.getTabIndexFromCursor())
|
|
}
|
|
|
|
func (terminalState *TerminalState) TabReset() {
|
|
terminalState.TabZonk()
|
|
const MaxTabs uint16 = 1024
|
|
const TabStep = 4
|
|
var i uint16
|
|
for i < MaxTabs {
|
|
terminalState.TabSet(i)
|
|
i += TabStep
|
|
}
|
|
}
|