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render markdown preview in the file browser

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Ian Gulliver
2026-10-18 11:48:53 -07:00
parent aac7cfe858
commit 4f9823129d
4 changed files with 37 additions and 8 deletions
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docs/operations.md
+1 -1
View File
@@ -344,7 +344,7 @@ The Changes view lists the files with their counts, opens a file's diff on click
The Files tab browses the selected task's worktree, read-only (`internal/server/files.go`). `GET /api/tasks/{taskId}/dir?path=` lists one directory, directories first and then by name, without entries named `.git`; `GET /api/tasks/{taskId}/file?path=` returns one regular file. Both take a slash-separated path relative to the worktree root and work only while the task is active (409 otherwise). Every path is opened through an `os.Root` on the worktree, so a path that leaves it, through `..`, an absolute path or a symlink at any depth, is a 400; a path with a `.git` component is also refused. A listing reports each entry as `dir`, `file` (with its size) or `other`, following symlinks that stay inside the worktree (`symlink` marks them); a symlink that leaves the worktree or points nowhere is `other` and can't be opened. Gitignored entries are listed with `ignored` set: one `git check-ignore --stdin` per listing (`git.Ignored`) over the entries' paths, taken from the directory's real path so a listing reached through an in-worktree symlink is checked where it really lives; untracked paths under an ignored directory count as ignored, tracked files never do. The view shows them dimmed with `ignored` beside them, and they open like anything else. A listing stops at `maxDirEntries` entries with `truncated` set. A file read sends at most `maxFileBytes`, cut back to a whole UTF-8 character, with `truncated` set when the file is longer; a file with a NUL byte or invalid UTF-8 in that part is `binary` and comes back with no text.
The view shows a breadcrumb from `worktree` down to the current directory or file, the directory's entries (a `../` row to go up), or the file's text with line numbers and a note when only its start is shown. Where you are is kept per task in memory, so switching tasks or tabs returns to it, but a relaunch starts at the root. It refetches what it shows 1.5s after the selected task's last tool result or turn end, keeping the scroll position.
The view shows a breadcrumb from `worktree` down to the current directory or file, the directory's entries (a `../` row to go up), or the file's text with line numbers and a note when only its start is shown. A file whose name ends in `.md` is rendered as Markdown with the transcript's renderer (`MarkdownView`) instead, with relative image paths taken from the file's own directory. Where you are is kept per task in memory, so switching tasks or tabs returns to it, but a relaunch starts at the root. It refetches what it shows 1.5s after the selected task's last tool result or turn end, keeping the scroll position.
## Terminals
mac/Sources/Byre/Files.swift
+25
View File
@@ -225,6 +225,9 @@ private struct FilesBody: View {
} else if let c = model.content {
if c.binary {
EmptyText(text: "Binary file.")
} else if model.place.file?.lowercased().hasSuffix(".md") == true {
FileMarkdown(content: c, taskId: store.selectedTaskId, dir: model.place.dir)
.id(model.generation)
} else {
FileText(content: c)
.id(model.generation)
@@ -308,6 +311,28 @@ private struct EntryRow: View {
}
}
private struct FileMarkdown: View {
let content: FileContent
let taskId: String?
let dir: String
var body: some View {
ScrollView {
VStack(alignment: .leading, spacing: 0) {
MarkdownView(blocks: parseMarkdown(content.text), ctx: MDContext(taskId: taskId, dir: dir))
if content.truncated {
Text("Showing the first \(bytes(shown(content))) of \(bytes(content.size)).")
.foregroundStyle(Palette.muted)
.padding(.top, 12)
}
}
.frame(maxWidth: .infinity, alignment: .leading)
.padding(.horizontal, 16)
.padding(.vertical, 10)
}
}
}
private struct FileText: View {
let content: FileContent
mac/Sources/Byre/Images.swift
+3 -1
View File
@@ -12,7 +12,7 @@ private let dataImage = Re(#"^data:image/(png|jpeg|gif|webp);"#, caseless: true)
private let fileURL = Re(#"^file://"#, caseless: true)
private let anyScheme = Re(#"^[a-z][a-z0-9+.-]*:"#, caseless: true)
func worktreeImageSource(_ path: String, _ taskId: String?) -> ImageSource? {
func worktreeImageSource(_ path: String, _ taskId: String?, dir: String = "") -> ImageSource? {
if dataImage.test(path) {
guard let comma = path.firstIndex(of: ","), path[..<comma].lowercased().hasSuffix(";base64"), let data = Data(base64Encoded: String(path[path.index(after: comma)...])) else {
return nil
@@ -27,6 +27,8 @@ func worktreeImageSource(_ path: String, _ taskId: String?) -> ImageSource? {
file = decoded
} else if anyScheme.test(file) {
return nil
} else if !dir.isEmpty && !file.hasPrefix("/") {
file = "\(dir)/\(file)"
}
guard let taskId else {
return nil
mac/Sources/Byre/MarkdownView.swift
+8 -6
View File
@@ -117,6 +117,7 @@ struct InlineRenderer {
let size: CGFloat
let taskId: String?
var weight: CGFloat = 400
var dir = ""
private struct Style {
var bold = false
@@ -189,7 +190,7 @@ struct InlineRenderer {
s.italic = true
render(inner, s, &out)
case .image(let src, let alt):
if let source = worktreeImageSource(src, taskId) {
if let source = worktreeImageSource(src, taskId, dir: dir) {
out.append(.image(source, src: src))
} else {
link(src, [.text(alt.isEmpty ? src : alt)], style, &out)
@@ -287,6 +288,7 @@ struct MDContext {
var choice: ((MDItem, Bool) -> AnyView)?
var gridColumns = 4
var weight: CGFloat = 400
var dir = ""
}
private enum MDRun {
@@ -418,7 +420,7 @@ private struct FlowBuilder {
}
private func inline(_ inlines: [MDInline], _ size: CGFloat) -> NSAttributedString {
let a = InlineRenderer(store: store, size: size, taskId: ctx.taskId, weight: ctx.weight).text(inlines)
let a = InlineRenderer(store: store, size: size, taskId: ctx.taskId, weight: ctx.weight, dir: ctx.dir).text(inlines)
return try! NSAttributedString(a, including: \.appKit)
}
@@ -585,7 +587,7 @@ struct InlineView: View {
@Environment(\.centerImages) private var centerImages
var body: some View {
let segs = InlineRenderer(store: store, size: ctx.size, taskId: ctx.taskId, weight: ctx.weight).segments(inlines)
let segs = InlineRenderer(store: store, size: ctx.size, taskId: ctx.taskId, weight: ctx.weight, dir: ctx.dir).segments(inlines)
VStack(alignment: .leading, spacing: 4) {
ForEach(Array(segs.enumerated()), id: \.offset) { _, seg in
switch seg {
@@ -631,7 +633,7 @@ private struct BlockView: View {
case .paragraph(let inlines):
InlineView(inlines: inlines, ctx: ctx)
case .heading(let level, let inlines):
InlineView(inlines: [.strong(inlines)], ctx: MDContext(size: level == 3 ? 14 : 13, color: ctx.color, taskId: ctx.taskId))
InlineView(inlines: [.strong(inlines)], ctx: MDContext(size: level == 3 ? 14 : 13, color: ctx.color, taskId: ctx.taskId, dir: ctx.dir))
.padding(.top, 4)
case .rule:
Rectangle()
@@ -639,7 +641,7 @@ private struct BlockView: View {
.frame(height: 1)
.padding(.vertical, 2)
case .quote(let blocks):
MarkdownView(blocks: blocks, ctx: MDContext(size: ctx.size, color: Palette.muted, taskId: ctx.taskId))
MarkdownView(blocks: blocks, ctx: MDContext(size: ctx.size, color: Palette.muted, taskId: ctx.taskId, dir: ctx.dir))
.padding(.leading, 13)
.overlay(alignment: .leading) {
Rectangle().fill(Palette.border).frame(width: 3)
@@ -786,7 +788,7 @@ private struct DetailsBlock: View {
HStack(alignment: .firstTextBaseline, spacing: 4) {
Text(open ? "▾" : "▸")
.foregroundStyle(Palette.accent)
InlineView(inlines: summary, ctx: MDContext(size: ctx.size, color: Palette.accent, taskId: ctx.taskId))
InlineView(inlines: summary, ctx: MDContext(size: ctx.size, color: Palette.accent, taskId: ctx.taskId, dir: ctx.dir))
}
.contentShape(Rectangle())
}