Esempio n. 1
0
func (t *Terminal) constrain() {
	count := t.merger.Length()
	height := t.maxItems()
	diffpos := t.cy - t.offset

	t.cy = util.Constrain(t.cy, 0, count-1)
	t.offset = util.Constrain(t.offset, t.cy-height+1, t.cy)
	// Adjustment
	if count-t.offset < height {
		t.offset = util.Max(0, count-height)
		t.cy = util.Constrain(t.offset+diffpos, 0, count-1)
	}
	t.offset = util.Max(0, t.offset)
}
Esempio n. 2
0
func (t *Terminal) maxItems() int {
	max := t.maxHeight() - 2 - len(t.header)
	if t.inlineInfo {
		max++
	}
	return util.Max(max, 0)
}
Esempio n. 3
0
// Tokenize tokenizes the given string with the delimiter
func Tokenize(runes []rune, delimiter Delimiter) []Token {
	if delimiter.str == nil && delimiter.regex == nil {
		// AWK-style (\S+\s*)
		tokens, prefixLength := awkTokenizer(runes)
		return withPrefixLengths(tokens, prefixLength)
	}

	var tokens []string
	if delimiter.str != nil {
		tokens = strings.Split(string(runes), *delimiter.str)
		for i := 0; i < len(tokens)-1; i++ {
			tokens[i] = tokens[i] + *delimiter.str
		}
	} else if delimiter.regex != nil {
		str := string(runes)
		for len(str) > 0 {
			loc := delimiter.regex.FindStringIndex(str)
			if loc == nil {
				loc = []int{0, len(str)}
			}
			last := util.Max(loc[1], 1)
			tokens = append(tokens, str[:last])
			str = str[last:]
		}
	}
	asRunes := make([][]rune, len(tokens))
	for i, token := range tokens {
		asRunes[i] = []rune(token)
	}
	return withPrefixLengths(asRunes, 0)
}
Esempio n. 4
0
// Transform is used to transform the input when --with-nth option is given
func Transform(tokens []Token, withNth []Range) []Token {
	transTokens := make([]Token, len(withNth))
	numTokens := len(tokens)
	for idx, r := range withNth {
		part := []rune{}
		minIdx := 0
		if r.begin == r.end {
			idx := r.begin
			if idx == rangeEllipsis {
				part = append(part, joinTokensAsRunes(tokens)...)
			} else {
				if idx < 0 {
					idx += numTokens + 1
				}
				if idx >= 1 && idx <= numTokens {
					minIdx = idx - 1
					part = append(part, tokens[idx-1].text...)
				}
			}
		} else {
			var begin, end int
			if r.begin == rangeEllipsis { // ..N
				begin, end = 1, r.end
				if end < 0 {
					end += numTokens + 1
				}
			} else if r.end == rangeEllipsis { // N..
				begin, end = r.begin, numTokens
				if begin < 0 {
					begin += numTokens + 1
				}
			} else {
				begin, end = r.begin, r.end
				if begin < 0 {
					begin += numTokens + 1
				}
				if end < 0 {
					end += numTokens + 1
				}
			}
			minIdx = util.Max(0, begin-1)
			for idx := begin; idx <= end; idx++ {
				if idx >= 1 && idx <= numTokens {
					part = append(part, tokens[idx-1].text...)
				}
			}
		}
		var prefixLength int
		if minIdx < numTokens {
			prefixLength = tokens[minIdx].prefixLength
		} else {
			prefixLength = 0
		}
		transTokens[idx] = Token{part, prefixLength, util.TrimLen(part)}
	}
	return transTokens
}
Esempio n. 5
0
func (t *Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int, current bool) {
	var maxe int
	for _, offset := range item.offsets {
		maxe = util.Max(maxe, int(offset[1]))
	}

	// Overflow
	text := make([]rune, len(item.text))
	copy(text, item.text)
	offsets := item.colorOffsets(col2, bold, current)
	maxWidth := C.MaxX() - 3 - t.marginInt[1] - t.marginInt[3]
	maxe = util.Constrain(maxe+util.Min(maxWidth/2-2, t.hscrollOff), 0, len(text))
	fullWidth := displayWidth(text)
	if fullWidth > maxWidth {
		if t.hscroll {
			// Stri..
			matchEndWidth := displayWidth(text[:maxe])
			if matchEndWidth <= maxWidth-2 {
				text, _ = trimRight(text, maxWidth-2)
				text = append(text, []rune("..")...)
			} else {
				// Stri..
				if matchEndWidth < fullWidth-2 {
					text = append(text[:maxe], []rune("..")...)
				}
				// ..ri..
				var diff int32
				text, diff = trimLeft(text, maxWidth-2)

				// Transform offsets
				for idx, offset := range offsets {
					b, e := offset.offset[0], offset.offset[1]
					b += 2 - diff
					e += 2 - diff
					b = util.Max32(b, 2)
					offsets[idx].offset[0] = b
					offsets[idx].offset[1] = util.Max32(b, e)
				}
				text = append([]rune(".."), text...)
			}
		} else {
			text, _ = trimRight(text, maxWidth-2)
			text = append(text, []rune("..")...)

			for idx, offset := range offsets {
				offsets[idx].offset[0] = util.Min32(offset.offset[0], int32(maxWidth-2))
				offsets[idx].offset[1] = util.Min32(offset.offset[1], int32(maxWidth))
			}
		}
	}

	var index int32
	var substr string
	var prefixWidth int
	maxOffset := int32(len(text))
	for _, offset := range offsets {
		b := util.Constrain32(offset.offset[0], index, maxOffset)
		e := util.Constrain32(offset.offset[1], index, maxOffset)

		substr, prefixWidth = processTabs(text[index:b], prefixWidth)
		C.CPrint(col1, bold, substr)

		if b < e {
			substr, prefixWidth = processTabs(text[b:e], prefixWidth)
			C.CPrint(offset.color, offset.bold, substr)
		}

		index = e
		if index >= maxOffset {
			break
		}
	}
	if index < maxOffset {
		substr, _ = processTabs(text[index:], prefixWidth)
		C.CPrint(col1, bold, substr)
	}
}