palette.go

package vtui

// Palette indices (mapped to far2l's enum PaletteColors)
const (
	ColMenuText = iota
	ColMenuSelectedText
	ColMenuHighlight
	ColMenuSelectedHighlight
	ColMenuBox
	ColMenuTitle

	ColTableText
	ColTableSelectedText
	ColTableTitle
	ColTableBox
	ColTableColumnTitle
	ColScrollBar

	ColDialogText
	ColDialogHighlightText
	ColDialogBox
	ColDialogBoxTitle
	ColDialogHighlightBoxTitle
	ColDialogEdit
	ColDialogButton
	ColDialogSelectedButton
	ColDialogHighlightButton
	ColDialogHighlightSelectedButton

	ColDesktopBackground
	ColDialogEditUnchanged
	ColDialogEditSelected

	ColKeyBarNum
	ColKeyBarText
	ColMenuBarItem
	ColMenuBarSelected
	ColMenuBarHighlight
	ColMenuBarSelectedHighlight
	ColShadow
	ColHelpText
	ColHelpBold
	ColHelpLink
	ColHelpSelectedLink
	ColHelpBox
	ColHelpBoxTitle

	ColWarnText
	ColWarnHighlightText
	ColWarnBox
	ColWarnBoxTitle
	ColWarnHighlightBoxTitle
	ColWarnEdit
	ColWarnButton
	ColWarnSelectedButton
	ColWarnHighlightButton
	ColWarnHighlightSelectedButton

	// Combo box dropdowns carry their own set so that a dropdown does not
	// vanish into the dialog behind it. Names follow far2l's Dialog.Combo.*
	// group (COL_DIALOGCBOX*).
	ColDialogComboText
	ColDialogComboSelectedText
	ColDialogComboHighlight
	ColDialogComboSelectedHighlight
	ColDialogComboBox
	ColDialogComboTitle
	ColDialogComboScrollbar

	// The help viewer draws its scrollbar inside its own window, so it needs a
	// slot of its own instead of the shared list color: far2l splits the same
	// way (Help.Scrollbar next to Menu.Scrollbar and Dialog.List.Scrollbar).
	ColHelpScrollbar

	// Tree lines are drawn by TreeView only. Keeping them apart from
	// ColTableBox lets that slot mean exactly one thing, the column separator
	// of a table.
	ColTreeLine

	// Background only for checkbox/radio indicators. Zero inherits the
	// normal control background, preserving themes that omit this slot.
	ColDialogIndicatorBackground

	// A menu draws its scrollbar on its own frame, over the menu background,
	// while ColScrollBar belongs to Table, ListBox and TreeView, which sit on
	// the table background. One slot cannot match both surfaces, and far2l
	// keeps them apart as well (Menu.Scrollbar and Dialog.List.Scrollbar).
	ColMenuScrollbar

	// Helper for array size
	LastPaletteColor
)

// Palette holds the current color attributes for all UI elements.
var Palette = make([]uint64, LastPaletteColor)

// SetDefaultPalette initializes the palette with standard Far Manager colors.
func SetDefaultPalette() {
	if len(Palette) < LastPaletteColor {
		Palette = make([]uint64, LastPaletteColor)
	}

	Palette[ColDialogIndicatorBackground] = 0

	// Standard Far colors translated to 24-bit RGB for vtinput
	black := uint32(0x000000)
	white := uint32(0xFFFFFF)
	cyan := uint32(0x00A0A0)
	blue := uint32(0x0000A0)
	yellow := uint32(0xFFFF00)
	lightGray := uint32(0xC0C0C0)
	darkGray := uint32(0x808080)

	// Menus (White on Cyan)
	Palette[ColMenuText] = SetRGBBoth(0, white, cyan)
	Palette[ColMenuSelectedText] = SetRGBBoth(0, white, black)
	Palette[ColMenuHighlight] = SetRGBBoth(0, yellow, cyan)
	Palette[ColMenuSelectedHighlight] = SetRGBBoth(0, yellow, black)
	Palette[ColMenuBox] = SetRGBBoth(0, white, cyan)
	Palette[ColMenuTitle] = SetRGBBoth(0, white, cyan)
	// The scrollbar runs down the menu frame, so it follows the frame colour
	// (far2l's Menu.Scrollbar default equals its Menu.Box).
	Palette[ColMenuScrollbar] = Palette[ColMenuBox]

	// Table (White on Blue)
	Palette[ColTableText] = SetRGBBoth(0, lightGray, blue)
	Palette[ColTableSelectedText] = SetRGBBoth(0, black, cyan)
	Palette[ColTableTitle] = SetRGBBoth(0, white, blue)
	Palette[ColTableBox] = SetRGBBoth(0, lightGray, blue)
	Palette[ColTableColumnTitle] = SetRGBBoth(0, yellow, blue)
	Palette[ColScrollBar] = SetRGBBoth(0, lightGray, blue)
	Palette[ColTreeLine] = Palette[ColTableBox]

	// Dialogs (Black on LightGray)
	Palette[ColDialogText] = SetRGBBoth(0, black, lightGray)
	Palette[ColDialogHighlightText] = SetRGBBoth(0, yellow, lightGray)
	Palette[ColDialogBox] = SetRGBBoth(0, black, lightGray)
	Palette[ColDialogBoxTitle] = SetRGBBoth(0, black, lightGray)
	Palette[ColDialogHighlightBoxTitle] = SetRGBBoth(0, yellow, lightGray)

	// Dialog Edits (Black on Cyan)
	Palette[ColDialogEdit] = SetRGBBoth(0, black, cyan)
	Palette[ColDialogEditSelected] = SetRGBBoth(0, black, lightGray)
	Palette[ColDialogEditUnchanged] = SetRGBBoth(0, darkGray, cyan)

	// Dialog Buttons
	Palette[ColDialogButton] = SetRGBBoth(0, black, lightGray)
	Palette[ColDialogHighlightButton] = SetRGBBoth(0, yellow, lightGray)
	Palette[ColDialogSelectedButton] = SetRGBBoth(0, black, cyan)
	Palette[ColDialogHighlightSelectedButton] = SetRGBBoth(0, yellow, cyan)

	// Combo dropdowns (far2l defaults: White on Cyan, inverted when selected)
	Palette[ColDialogComboText] = SetRGBBoth(0, white, cyan)
	Palette[ColDialogComboSelectedText] = SetRGBBoth(0, white, black)
	Palette[ColDialogComboHighlight] = SetRGBBoth(0, yellow, cyan)
	Palette[ColDialogComboSelectedHighlight] = SetRGBBoth(0, yellow, black)
	Palette[ColDialogComboBox] = SetRGBBoth(0, white, cyan)
	Palette[ColDialogComboTitle] = SetRGBBoth(0, white, cyan)
	Palette[ColDialogComboScrollbar] = SetRGBBoth(0, white, cyan)

	// Desktop (Classic Blue)
	Palette[ColDesktopBackground] = SetRGBBoth(0, lightGray, blue)

	// KeyBar (Match f4/far2l defaults: LightGray on DarkGray / DarkGray on Teal)
	Palette[ColKeyBarNum] = SetRGBBoth(0, 0xD3D7CF, 0x2E3436)
	Palette[ColKeyBarText] = SetRGBBoth(0, 0x2E3436, 0x06989A)

	// MenuBar (Black on LightGray, Green on LightGray for selection)
	Palette[ColMenuBarItem] = SetRGBBoth(0, black, lightGray)
	Palette[ColMenuBarSelected] = SetRGBBoth(0, black, 0x00FF00) // Green background
	Palette[ColMenuBarHighlight] = SetRGBBoth(0, yellow, lightGray)
	Palette[ColMenuBarSelectedHighlight] = SetRGBBoth(0, yellow, 0x00FF00)

	// Shadow (Solid black background)
	Palette[ColShadow] = SetRGBBoth(0, black, black)

	// Help (Match far2l: DarkGray on LightGray/White)
	Palette[ColHelpText] = SetRGBBoth(0, black, 0xD3D7CF)
	Palette[ColHelpBold] = SetRGBBoth(0, white, 0xD3D7CF)
	Palette[ColHelpLink] = SetRGBBoth(0, 0x0000A0, 0xD3D7CF)      // Blue links
	Palette[ColHelpSelectedLink] = SetRGBBoth(0, white, 0x0000A0) // White on Blue
	Palette[ColHelpBox] = Palette[ColHelpText]
	Palette[ColHelpBoxTitle] = Palette[ColHelpText]
	// The shared list scrollbar sits on blue, which does not belong in the
	// light help window, so the help scrollbar follows the help frame instead.
	Palette[ColHelpScrollbar] = Palette[ColHelpBox]

	red := uint32(0x800000)
	// Warnings (White/Yellow on Red)
	Palette[ColWarnText] = SetRGBBoth(0, white, red)
	Palette[ColWarnHighlightText] = SetRGBBoth(0, yellow, red)
	Palette[ColWarnBox] = SetRGBBoth(0, white, red)
	Palette[ColWarnBoxTitle] = SetRGBBoth(0, white, red)
	Palette[ColWarnHighlightBoxTitle] = SetRGBBoth(0, yellow, red)
	Palette[ColWarnEdit] = SetRGBBoth(0, black, cyan)
	Palette[ColWarnButton] = SetRGBBoth(0, white, red)
	Palette[ColWarnSelectedButton] = SetRGBBoth(0, black, cyan)
	Palette[ColWarnHighlightButton] = SetRGBBoth(0, yellow, red)
	Palette[ColWarnHighlightSelectedButton] = SetRGBBoth(0, yellow, cyan)
}

// ThemePalette is the host application's 256-color palette for UI indexing.
var ThemePalette [256]uint32

func init() {
	copy(ThemePalette[:], XTerm256Palette[:])
}

// XTerm256Palette is the standard 256-color lookup table.
var XTerm256Palette = [256]uint32{
	0x000000, 0x800000, 0x008000, 0x808000, 0x000080, 0x800080, 0x008080, 0xc0c0c0,
	0x808080, 0xff0000, 0x00ff00, 0xffff00, 0x0000ff, 0xff00ff, 0x00ffff, 0xffffff,
	0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,
	0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af,
	0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff,
	0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,
	0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,
	0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,
	0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,
	0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,
	0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,
	0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,
	0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af,
	0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff,
	0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
	0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,
	0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,
	0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,
	0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af,
	0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff,
	0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,
	0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af,
	0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,
	0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,
	0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af,
	0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,
	0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,
	0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af,
	0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff,
	0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
	0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,
	0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee,
}