chore(deps): 🚀 update module dependencies
* Add new dependencies for terminal handling and color management. * Include updates for tcell, go-colorful, tview, and uniseg. * Update golang.org/x/sys and golang.org/x/term for improved compatibility. * Ensure all dependencies are explicitly listed with their versions.
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158
vendor/github.com/rivo/tview/util.go
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158
vendor/github.com/rivo/tview/util.go
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package tview
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import (
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"math"
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"os"
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"regexp"
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"github.com/gdamore/tcell/v2"
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)
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// Text alignment within a box. Also used to align images.
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const (
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AlignLeft = iota
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AlignCenter
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AlignRight
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AlignTop = 0
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AlignBottom = 2
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)
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var (
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// Regular expression used to escape style/region tags.
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escapePattern = regexp.MustCompile(`(\[[a-zA-Z0-9_,;: \-\."#]+\[*)\]`)
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// Regular expression used to unescape escaped style/region tags.
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unescapePattern = regexp.MustCompile(`(\[[a-zA-Z0-9_,;: \-\."#]+\[*)\[\]`)
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// The number of colors available in the terminal.
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availableColors = 256
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)
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// Package initialization.
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func init() {
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// Determine the number of colors available in the terminal.
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info, err := tcell.LookupTerminfo(os.Getenv("TERM"))
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if err == nil {
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availableColors = info.Colors
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}
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}
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// Print prints text onto the screen into the given box at (x,y,maxWidth,1),
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// not exceeding that box. "align" is one of AlignLeft, AlignCenter, or
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// AlignRight. The screen's background color will not be changed.
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//
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// You can change the colors and text styles mid-text by inserting a style tag.
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// See the package description for details.
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//
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// Returns the number of actual bytes of the text printed (including style tags)
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// and the actual width used for the printed runes.
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func Print(screen tcell.Screen, text string, x, y, maxWidth, align int, color tcell.Color) (int, int) {
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start, end, width := printWithStyle(screen, text, x, y, 0, maxWidth, align, tcell.StyleDefault.Foreground(color), true)
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return end - start, width
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}
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// printWithStyle works like [Print] but it takes a style instead of just a
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// foreground color. The skipWidth parameter specifies the number of cells
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// skipped at the beginning of the text. It returns the start index, end index
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// (exclusively), and screen width of the text actually printed. If
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// maintainBackground is "true", the existing screen background is not changed
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// (i.e. the style's background color is ignored).
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func printWithStyle(screen tcell.Screen, text string, x, y, skipWidth, maxWidth, align int, style tcell.Style, maintainBackground bool) (start, end, printedWidth int) {
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totalWidth, totalHeight := screen.Size()
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if maxWidth <= 0 || len(text) == 0 || y < 0 || y >= totalHeight {
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return 0, 0, 0
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}
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// If we don't overwrite the background, we use the default color.
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if maintainBackground {
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style = style.Background(tcell.ColorDefault)
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}
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// Skip beginning and measure width.
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var textWidth int
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state := &stepState{
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unisegState: -1,
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style: style,
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}
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newState := *state
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str := text
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for len(str) > 0 {
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_, str, state = step(str, state, stepOptionsStyle)
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if skipWidth > 0 {
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skipWidth -= state.Width()
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text = str
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newState = *state
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start += state.GrossLength()
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} else {
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textWidth += state.Width()
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}
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}
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state = &newState
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// Reduce all alignments to AlignLeft.
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if align == AlignRight {
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// Chop off characters on the left until it fits.
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for len(text) > 0 && textWidth > maxWidth {
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_, text, state = step(text, state, stepOptionsStyle)
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textWidth -= state.Width()
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start += state.GrossLength()
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}
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x, maxWidth = x+maxWidth-textWidth, textWidth
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} else if align == AlignCenter {
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// Chop off characters on the left until it fits.
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subtracted := (textWidth - maxWidth) / 2
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for len(text) > 0 && subtracted > 0 {
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_, text, state = step(text, state, stepOptionsStyle)
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subtracted -= state.Width()
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textWidth -= state.Width()
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start += state.GrossLength()
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}
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if textWidth < maxWidth {
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x, maxWidth = x+maxWidth/2-textWidth/2, textWidth
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}
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}
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// Draw left-aligned text.
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end = start
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rightBorder := x + maxWidth
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for len(text) > 0 && x < rightBorder && x < totalWidth {
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var c string
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c, text, state = step(text, state, stepOptionsStyle)
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if c == "" {
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break // We don't care about the style at the end.
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}
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width := state.Width()
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if width > 0 {
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finalStyle := state.Style()
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if maintainBackground {
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_, backgroundColor, _ := finalStyle.Decompose()
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if backgroundColor == tcell.ColorDefault {
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_, _, existingStyle, _ := screen.GetContent(x, y)
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_, background, _ := existingStyle.Decompose()
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finalStyle = finalStyle.Background(background)
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}
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}
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for offset := width - 1; offset >= 0; offset-- {
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// To avoid undesired effects, we populate all cells.
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runes := []rune(c)
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if offset == 0 {
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screen.SetContent(x+offset, y, runes[0], runes[1:], finalStyle)
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} else {
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screen.SetContent(x+offset, y, ' ', nil, finalStyle)
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}
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}
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}
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x += width
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end += state.GrossLength()
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printedWidth += width
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}
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return
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}
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// PrintSimple prints white text to the screen at the given position.
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func PrintSimple(screen tcell.Screen, text string, x, y int) {
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Print(screen, text, x, y, math.MaxInt32, AlignLeft, Styles.PrimaryTextColor)
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}
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