2 files changed, 61 insertions(+), 9 deletions(-)

M tab.go
M viewport.go

@@ 35,6 35,11 @@ const (
 
 type tabID uint64
 
+const (
+	homeURL = "home://"
+	helpURL = "help://"
+)
+
 type Tab struct {
 	id           tabID
 	mode         mode


@@ 46,6 51,7 @@ type Tab struct {
 	history      *history.History
 	bookmarks    *bookmark.Store
 	lastResponse ServerResponse
+	specialPages map[string]func(Tab) string
 }
 
 func NewTab(client *gemini.Client, startURL string, bs *bookmark.Store, h *history.History, id tabID) Tab {


@@ 65,6 71,10 @@ func NewTab(client *gemini.Client, startURL string, bs *bookmark.Store, h *histo
 		viewport:  NewViewport(startURL, h),
 		message:   Message{},
 		bookmarks: bs,
+		specialPages: map[string]func(Tab) string{
+			homeURL: homeContent,
+			helpURL: helpContent,
+		},
 	}
 }
 


@@ 190,7 200,7 @@ func (tab Tab) showInput(msg, val, payload string, typ int) (Tab, tea.Cmd) {
 	return tab, textinput.Blink
 }
 
-func (tab Tab) homeContent() string {
+func homeContent(tab Tab) string {
 	var buf strings.Builder
 	fmt.Fprint(&buf, "# Home\n\n")
 	for _, bookmark := range builtinBookmarks {


@@ 204,6 214,40 @@ func (tab Tab) homeContent() string {
 	return buf.String()
 }
 
+func helpContent(tab Tab) string {
+	s := `
+# Keys
+
+Go back		h
+Go forward		l
+Open link		type number + enter
+Open link in tab	type number + t
+Quit			ctrl+c
+Next tab		tab
+Previous tab		shift+tab
+Goto tab		alt+#
+Close tab		q
+Goto URL		g
+Download page		d
+Home			H
+Bookmark		b
+Scroll up		k
+Scroll download	j
+Scroll up (page)	Page up
+Scroll down (page)	Page down
+
+
+# Mouse
+
+Open link		Left click
+Open link in tab	Middle click
+Close tab		Middle click (on tab)
+Go back		Right click
+Scroll		Mouse wheel
+`
+	return s
+}
+
 type LoadError struct {
 	err     error
 	message string


@@ 305,7 349,8 @@ func (tab Tab) loadURL(url string, addHist bool, level int, skipVerify bool) (Ta
 	if !strings.Contains(url, "://") {
 		url = fmt.Sprintf("gemini://%s", url)
 	}
-	if url != "home://" && !strings.HasPrefix(url, "gemini://") && !strings.HasPrefix(url, "gopher://") {
+	specialF, isSpecial := tab.specialPages[url]
+	if !isSpecial && !strings.HasPrefix(url, "gemini://") && !strings.HasPrefix(url, "gopher://") {
 		tab.viewport.loading = false
 		return tab.showMessage(fmt.Sprintf("Open %q externally?", url), url, messageLoadExternal, true)
 	}


@@ 319,11 364,11 @@ func (tab Tab) loadURL(url string, addHist bool, level int, skipVerify bool) (Ta
 	cmd := func() tea.Msg {
 		defer cancel()
 
-		if url == "home://" {
+		if isSpecial {
 			if addHist {
 				tab.history.Add(url)
 			}
-			return GeminiResponse{Response: &gemini.Response{Body: []byte(tab.homeContent()),
+			return GeminiResponse{Response: &gemini.Response{Body: []byte(specialF(tab)),
 				URL: url, Header: gemini.Header{Status: 2, Meta: "text/gemini"}}, level: level, tab: tab.id}
 		}
 

@@ 25,6 25,7 @@ const (
 	buttonGoto     = "Goto"
 	buttonCloseTab = "Close Tab"
 	buttonQuit     = "Quit"
+	buttonHelp     = "Help"
 )
 
 type Viewport struct {


@@ 50,7 51,7 @@ func NewViewport(startURL string, h *history.History) Viewport {
 		URL:     startURL,
 		spinner: s,
 		history: h,
-		footer:  NewFooter(buttonBack, buttonFwd, buttonHome, buttonBookmark, buttonDownload, buttonQuit),
+		footer:  NewFooter(buttonBack, buttonFwd, buttonHome, buttonBookmark, buttonDownload, buttonHelp, buttonQuit),
 	}
 }
 


@@ 104,7 105,6 @@ func (v Viewport) Update(msg tea.Msg) (Viewport, tea.Cmd) {
 	switch msg := msg.(type) {
 	case tea.WindowSizeMsg:
 		verticalMargins := headerHeight + footerHeight
-
 		if !v.ready {
 			v.viewport = viewport.Model{Width: msg.Width, Height: msg.Height - verticalMargins}
 			v.viewport.YPosition = headerHeight


@@ 113,7 113,7 @@ func (v Viewport) Update(msg tea.Msg) (Viewport, tea.Cmd) {
 			v.ready = true
 			startURL := v.URL
 			if startURL == "" {
-				startURL = "home://"
+				startURL = homeURL
 			}
 			return v, fireEvent(LoadURLEvent{URL: startURL, AddHistory: v.history.Current() != startURL})
 		} else {


@@ 135,6 135,8 @@ func (v Viewport) Update(msg tea.Msg) (Viewport, tea.Cmd) {
 			return v, v.handleButtonClick(buttonHome)
 		case "b":
 			return v, v.handleButtonClick(buttonBookmark)
+		case "?":
+			return v, v.handleButtonClick(buttonHelp)
 		case "left", "h":
 			return v, v.handleButtonClick(buttonBack)
 		case "right", "l":


@@ 186,7 188,12 @@ func (v Viewport) handleButtonClick(btn string) tea.Cmd {
 	case buttonFwd:
 		return fireEvent(GoForwardEvent{})
 	case buttonHome:
-		return fireEvent(LoadURLEvent{URL: "home://", AddHistory: true})
+		return fireEvent(LoadURLEvent{URL: homeURL, AddHistory: true})
+	case buttonHelp:
+		if v.URL == helpURL {
+			return fireEvent(GoBackEvent{})
+		}
+		return fireEvent(LoadURLEvent{URL: helpURL, AddHistory: true})
 	case buttonBookmark:
 		return fireEvent(ToggleBookmarkEvent{URL: v.URL, Title: v.title})
 	case buttonDownload:


@@ 195,7 202,7 @@ func (v Viewport) handleButtonClick(btn string) tea.Cmd {
 			Type:  inputDownloadSrc})
 	case buttonGoto:
 		var val string
-		if cur := v.history.Current(); cur != "home://" {
+		if cur := v.history.Current(); cur != homeURL && cur != helpURL {
 			val = cur
 		}
 		return fireEvent(ShowInputEvent{Message: "Go to", Type: inputNav, Payload: "", Value: val})