feat(tui): file viewer, select messages

1 files changed, 109 insertions, 0 deletions

diff --git a/packages/tui/internal/util/file.go b/packages/tui/internal/util/file.go
new file mode 100644
index 000000000..2c0987dcf
--- /dev/null
+++ b/packages/tui/internal/util/file.go
@@ -0,0 +1,109 @@
+package util
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"unicode"
+
+	"github.com/charmbracelet/lipgloss/v2/compat"
+	"github.com/charmbracelet/x/ansi"
+	"github.com/sst/opencode/internal/styles"
+	"github.com/sst/opencode/internal/theme"
+)
+
+var RootPath string
+var CwdPath string
+
+type fileRenderer struct {
+	filename string
+	content  string
+	height   int
+}
+
+type fileRenderingOption func(*fileRenderer)
+
+func WithTruncate(height int) fileRenderingOption {
+	return func(c *fileRenderer) {
+		c.height = height
+	}
+}
+
+func RenderFile(
+	filename string,
+	content string,
+	width int,
+	options ...fileRenderingOption) string {
+	t := theme.CurrentTheme()
+	renderer := &fileRenderer{
+		filename: filename,
+		content:  content,
+	}
+	for _, option := range options {
+		option(renderer)
+	}
+
+	lines := []string{}
+	for line := range strings.SplitSeq(content, "\n") {
+		line = strings.TrimRightFunc(line, unicode.IsSpace)
+		line = strings.ReplaceAll(line, "\t", "  ")
+		lines = append(lines, line)
+	}
+	content = strings.Join(lines, "\n")
+
+	if renderer.height > 0 {
+		content = TruncateHeight(content, renderer.height)
+	}
+	content = fmt.Sprintf("```%s\n%s\n```", Extension(renderer.filename), content)
+	content = ToMarkdown(content, width, t.BackgroundPanel())
+	return content
+}
+
+func TruncateHeight(content string, height int) string {
+	lines := strings.Split(content, "\n")
+	if len(lines) > height {
+		return strings.Join(lines[:height], "\n")
+	}
+	return content
+}
+
+func Relative(path string) string {
+	path = strings.TrimPrefix(path, CwdPath+"/")
+	return strings.TrimPrefix(path, RootPath+"/")
+}
+
+func Extension(path string) string {
+	ext := filepath.Ext(path)
+	if ext == "" {
+		ext = ""
+	} else {
+		ext = strings.ToLower(ext[1:])
+	}
+	return ext
+}
+
+func ToMarkdown(content string, width int, backgroundColor compat.AdaptiveColor) string {
+	r := styles.GetMarkdownRenderer(width-7, backgroundColor)
+	content = strings.ReplaceAll(content, RootPath+"/", "")
+	rendered, _ := r.Render(content)
+	lines := strings.Split(rendered, "\n")
+
+	if len(lines) > 0 {
+		firstLine := lines[0]
+		cleaned := ansi.Strip(firstLine)
+		nospace := strings.ReplaceAll(cleaned, " ", "")
+		if nospace == "" {
+			lines = lines[1:]
+		}
+		if len(lines) > 0 {
+			lastLine := lines[len(lines)-1]
+			cleaned = ansi.Strip(lastLine)
+			nospace = strings.ReplaceAll(cleaned, " ", "")
+			if nospace == "" {
+				lines = lines[:len(lines)-1]
+			}
+		}
+	}
+	content = strings.Join(lines, "\n")
+	return strings.TrimSuffix(content, "\n")
+}