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@ -24,7 +24,7 @@ var (
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regionPattern = regexp.MustCompile(`\["([a-zA-Z0-9_,;: \-\.]*)"\]`)
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regionPattern = regexp.MustCompile(`\["([a-zA-Z0-9_,;: \-\.]*)"\]`)
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escapePattern = regexp.MustCompile(`\[([a-zA-Z0-9_,;: \-\."#]+)\[(\[*)\]`)
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escapePattern = regexp.MustCompile(`\[([a-zA-Z0-9_,;: \-\."#]+)\[(\[*)\]`)
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nonEscapePattern = regexp.MustCompile(`(\[[a-zA-Z0-9_,;: \-\."#]+\[*)\]`)
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nonEscapePattern = regexp.MustCompile(`(\[[a-zA-Z0-9_,;: \-\."#]+\[*)\]`)
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boundaryPattern = regexp.MustCompile(`(([[:punct:]]|\n)[ \t\f\r]*|(\s+))`)
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boundaryPattern = regexp.MustCompile(`(([[:punct:]]|\n)[ \t\f\r]*|([ \t\f\r]+))`)
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spacePattern = regexp.MustCompile(`\s+`)
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spacePattern = regexp.MustCompile(`\s+`)
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)
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)
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@ -454,8 +454,8 @@ func WordWrap(text string, width int) (lines []string) {
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var (
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var (
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colorPos, escapePos, breakpointPos, tagOffset int
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colorPos, escapePos, breakpointPos, tagOffset int
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lastBreakpoint, lastContinuation, currentLineStart int
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lastBreakpoint, lastContinuation, currentLineStart int
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lineWidth, continuationWidth int
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lineWidth, overflow int
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newlineBreakpoint bool
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forceBreak bool
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)
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)
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unescape := func(substr string, startIndex int) string {
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unescape := func(substr string, startIndex int) string {
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// A helper function to unescape escaped tags.
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// A helper function to unescape escaped tags.
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@ -468,54 +468,65 @@ func WordWrap(text string, width int) (lines []string) {
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return substr
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return substr
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}
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}
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iterateString(strippedText, func(main rune, comb []rune, textPos, textWidth, screenPos, screenWidth int) bool {
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iterateString(strippedText, func(main rune, comb []rune, textPos, textWidth, screenPos, screenWidth int) bool {
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// Handle colour tags.
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// Handle tags.
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if colorPos < len(colorTagIndices) && textPos+tagOffset >= colorTagIndices[colorPos][0] && textPos+tagOffset < colorTagIndices[colorPos][1] {
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for {
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tagOffset += colorTagIndices[colorPos][1] - colorTagIndices[colorPos][0]
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if colorPos < len(colorTagIndices) && textPos+tagOffset >= colorTagIndices[colorPos][0] && textPos+tagOffset < colorTagIndices[colorPos][1] {
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colorPos++
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// Colour tags.
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}
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tagOffset += colorTagIndices[colorPos][1] - colorTagIndices[colorPos][0]
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colorPos++
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// Handle escape tags.
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} else if escapePos < len(escapeIndices) && textPos+tagOffset == escapeIndices[escapePos][1]-2 {
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if escapePos < len(escapeIndices) && textPos+tagOffset == escapeIndices[escapePos][1]-2 {
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// Escape tags.
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tagOffset++
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tagOffset++
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escapePos++
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escapePos++
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}
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} else {
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break
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// Check if a break is warranted.
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}
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afterContinuation := lastContinuation > 0 && textPos+tagOffset >= lastContinuation
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noBreakpoint := lastContinuation == 0
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beyondWidth := lineWidth > 0 && lineWidth > width
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if beyondWidth && noBreakpoint {
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// We need a hard break without a breakpoint.
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lines = append(lines, unescape(text[currentLineStart:textPos+tagOffset], currentLineStart))
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currentLineStart = textPos + tagOffset
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lineWidth = continuationWidth
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} else if afterContinuation && (beyondWidth || newlineBreakpoint) {
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// Break at last breakpoint or at newline.
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lines = append(lines, unescape(text[currentLineStart:lastBreakpoint], currentLineStart))
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currentLineStart = lastContinuation
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lineWidth = continuationWidth
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lastBreakpoint, lastContinuation, newlineBreakpoint = 0, 0, false
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}
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}
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// Is this a breakpoint?
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// Is this a breakpoint?
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if breakpointPos < len(breakpoints) && textPos == breakpoints[breakpointPos][0] {
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if breakpointPos < len(breakpoints) && textPos+tagOffset == breakpoints[breakpointPos][0] {
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// Yes, it is. Set up breakpoint infos depending on its type.
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// Yes, it is. Set up breakpoint infos depending on its type.
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lastBreakpoint = breakpoints[breakpointPos][0] + tagOffset
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lastBreakpoint = breakpoints[breakpointPos][0] + tagOffset
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lastContinuation = breakpoints[breakpointPos][1] + tagOffset
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lastContinuation = breakpoints[breakpointPos][1] + tagOffset
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newlineBreakpoint = main == '\n'
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overflow = 0
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if breakpoints[breakpointPos][6] < 0 && !newlineBreakpoint {
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forceBreak = main == '\n'
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if breakpoints[breakpointPos][6] < 0 && !forceBreak {
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lastBreakpoint++ // Don't skip punctuation.
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lastBreakpoint++ // Don't skip punctuation.
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}
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}
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breakpointPos++
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breakpointPos++
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}
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}
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// Once we hit the continuation point, we start buffering widths.
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// Check if a break is warranted.
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if textPos+tagOffset < lastContinuation {
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if forceBreak || lineWidth > 0 && lineWidth+screenWidth > width {
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continuationWidth = 0
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breakpoint := lastBreakpoint
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continuation := lastContinuation
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if forceBreak {
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breakpoint = textPos + tagOffset
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continuation = textPos + tagOffset + 1
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lastBreakpoint = 0
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overflow = 0
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} else if lastBreakpoint <= currentLineStart {
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breakpoint = textPos + tagOffset
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continuation = textPos + tagOffset
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overflow = 0
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}
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lines = append(lines, unescape(text[currentLineStart:breakpoint], currentLineStart))
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currentLineStart, lineWidth, forceBreak = continuation, overflow, false
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}
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// Remember the characters since the last breakpoint.
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if lastBreakpoint > 0 && lastContinuation <= textPos+tagOffset {
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overflow += screenWidth
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}
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}
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// Advance.
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lineWidth += screenWidth
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lineWidth += screenWidth
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continuationWidth += screenWidth
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// But if we're still inside a breakpoint, skip next character (whitespace).
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if textPos+tagOffset < currentLineStart {
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lineWidth -= screenWidth
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}
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return false
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return false
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})
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})
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@ -558,7 +569,6 @@ func iterateString(text string, callback func(main rune, comb []rune, textPos, t
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comb = r[1:]
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comb = r[1:]
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}
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}
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// panic(fmt.Sprintf(`from=%d to=%d screenPos=%d width=%d`, from, to, screenPos, width))
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if callback(r[0], comb, from, to-from, screenPos, width) {
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if callback(r[0], comb, from, to-from, screenPos, width) {
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return true
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return true
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}
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}
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