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- 会话分叉: 按 c 键从历史会话分叉，支持带方向提示 - 启动自动加载历史记录 - 增量扫描: 缓存内存化、目录 modTime 跳过、已删除条目裁剪 - 刷新按钮复用 onTabSwitch 单一入口
135 lines
2.5 KiB
Go
135 lines
2.5 KiB
Go
package internal
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import (
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"crypto/rand"
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"encoding/base64"
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"math/big"
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"runtime"
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"strings"
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"unicode/utf16"
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"unicode/utf8"
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)
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// 平台信息（启动时确定）
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var (
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isWindows = runtime.GOOS == "windows"
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platformKey = runtime.GOOS + "-" + runtime.GOARCH
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)
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// toWinPath 将路径中的 / 替换为 \
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func toWinPath(s string) string {
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return strings.ReplaceAll(s, "/", "\\")
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}
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// --- 字符串宽度 ---
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func stringWidth(s string) int {
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w := 0
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for _, r := range s {
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w += runeWidth(r)
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}
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return w
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}
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func runeWidth(r rune) int {
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if r >= 0x1100 &&
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(r <= 0x115F || r == 0x2329 || r == 0x232A ||
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(r >= 0x2E80 && r <= 0xA4CF && r != 0x303F) ||
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(r >= 0xAC00 && r <= 0xD7A3) ||
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(r >= 0xF900 && r <= 0xFAFF) ||
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(r >= 0xFE10 && r <= 0xFE19) ||
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(r >= 0xFE30 && r <= 0xFE6F) ||
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(r >= 0xFF01 && r <= 0xFF60) ||
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(r >= 0xFFE0 && r <= 0xFFE6) ||
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(r >= 0x20000 && r <= 0x2FFFD) ||
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(r >= 0x30000 && r <= 0x3FFFD)) {
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return 2
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}
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return 1
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}
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func padRightByWidth(s string, targetW int) string {
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w := stringWidth(s)
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if w >= targetW {
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return s
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}
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return s + strings.Repeat(" ", targetW-w)
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}
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func truncateByWidth(s string, maxW int) string {
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w := 0
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for i := 0; i < len(s); {
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r, size := utf8.DecodeRuneInString(s[i:])
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rw := runeWidth(r)
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if w+rw > maxW {
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return s[:i]
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}
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w += rw
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i += size
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}
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return s
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}
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func wrapByWidth(s string, maxW int) []string {
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if maxW <= 0 || s == "" {
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return []string{s}
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}
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var lines []string
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for s != "" {
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cut := truncateByWidth(s, maxW)
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lines = append(lines, cut)
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s = s[len(cut):]
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}
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return lines
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}
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func fitWidth(s string, w int) string {
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return padRightByWidth(truncateByWidth(s, w), w)
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}
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// --- 视口 ---
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func viewport(cursor, total, height int) (int, int) {
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if total <= height {
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return 0, total
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}
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half := height / 2
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start := cursor - half
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if start < 0 {
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start = 0
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}
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end := start + height
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if end > total {
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end = total
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start = end - height
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if start < 0 {
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start = 0
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}
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}
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return start, end
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}
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func padLinesTo(lines []string, w, target int) string {
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for len(lines) < target {
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lines = append(lines, strings.Repeat(" ", w))
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}
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return strings.Join(lines, "\n")
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}
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// --- Windows Terminal ---
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func encodePSCommand(script string) string {
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u16 := utf16.Encode([]rune(script))
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b := make([]byte, len(u16)*2)
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for i, r := range u16 {
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b[i*2] = byte(r)
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b[i*2+1] = byte(r >> 8)
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}
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return base64.StdEncoding.EncodeToString(b)
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}
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func randRange(min, max int) int {
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n, _ := rand.Int(rand.Reader, big.NewInt(int64(max-min)))
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return min + int(n.Int64())
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}
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