package widgets import ( "bytes" "context" "math" "regexp" "sort" "time" "github.com/gdamore/tcell/v2" "git.sr.ht/~rjarry/aerc/config" "git.sr.ht/~rjarry/aerc/lib" "git.sr.ht/~rjarry/aerc/lib/parse" "git.sr.ht/~rjarry/aerc/lib/state" "git.sr.ht/~rjarry/aerc/lib/templates" "git.sr.ht/~rjarry/aerc/lib/ui" "git.sr.ht/~rjarry/aerc/log" "git.sr.ht/~rjarry/aerc/models" "git.sr.ht/~rjarry/aerc/worker/types" ) type DirectoryLister interface { ui.Drawable Selected() string Select(string) Update(types.WorkerMessage) List() []string ClearList() OnVirtualNode(func()) NextPrev(int) CollapseFolder() ExpandFolder() SelectedMsgStore() (*lib.MessageStore, bool) MsgStore(string) (*lib.MessageStore, bool) SelectedDirectory() *models.Directory Directory(string) *models.Directory SetMsgStore(*models.Directory, *lib.MessageStore) FilterDirs([]string, []string, bool) []string GetRUECount(string) (int, int, int) UiConfig(string) *config.UIConfig } type DirectoryList struct { Scrollable acctConf *config.AccountConfig store *lib.DirStore dirs []string selecting string selected string spinner *Spinner worker *types.Worker ctx context.Context cancel context.CancelFunc } func NewDirectoryList(acctConf *config.AccountConfig, worker *types.Worker, ) DirectoryLister { ctx, cancel := context.WithCancel(context.Background()) dirlist := &DirectoryList{ acctConf: acctConf, store: lib.NewDirStore(), worker: worker, ctx: ctx, cancel: cancel, } uiConf := dirlist.UiConfig("") dirlist.spinner = NewSpinner(uiConf) dirlist.spinner.Start() if uiConf.DirListTree { return NewDirectoryTree(dirlist) } return dirlist } func (dirlist *DirectoryList) UiConfig(dir string) *config.UIConfig { if dir == "" { dir = dirlist.Selected() } return config.Ui.ForAccount(dirlist.acctConf.Name).ForFolder(dir) } func (dirlist *DirectoryList) List() []string { return dirlist.dirs } func (dirlist *DirectoryList) ClearList() { dirlist.dirs = []string{} } func (dirlist *DirectoryList) OnVirtualNode(_ func()) { } func (dirlist *DirectoryList) Update(msg types.WorkerMessage) { switch msg := msg.(type) { case *types.Done: switch msg := msg.InResponseTo().(type) { case *types.OpenDirectory: dirlist.selected = msg.Directory dirlist.filterDirsByFoldersConfig() hasSelected := false for _, d := range dirlist.dirs { if d == dirlist.selected { hasSelected = true break } } if !hasSelected && dirlist.selected != "" { dirlist.dirs = append(dirlist.dirs, dirlist.selected) } if dirlist.acctConf.EnableFoldersSort { sort.Strings(dirlist.dirs) } dirlist.sortDirsByFoldersSortConfig() store, ok := dirlist.SelectedMsgStore() if !ok { return } store.SetContext(msg.Context) case *types.ListDirectories: dirlist.filterDirsByFoldersConfig() dirlist.sortDirsByFoldersSortConfig() dirlist.spinner.Stop() dirlist.Invalidate() case *types.RemoveDirectory: dirlist.store.Remove(msg.Directory) dirlist.filterDirsByFoldersConfig() dirlist.sortDirsByFoldersSortConfig() case *types.CreateDirectory: dirlist.filterDirsByFoldersConfig() dirlist.sortDirsByFoldersSortConfig() dirlist.Invalidate() } case *types.DirectoryInfo: dir := dirlist.Directory(msg.Info.Name) if dir == nil { return } dir.Exists = msg.Info.Exists dir.Recent = msg.Info.Recent dir.Unseen = msg.Info.Unseen if msg.Refetch { store, ok := dirlist.SelectedMsgStore() if ok { store.Sort(store.GetCurrentSortCriteria(), nil) } } default: return } } func (dirlist *DirectoryList) CollapseFolder() { // no effect for the DirectoryList } func (dirlist *DirectoryList) ExpandFolder() { // no effect for the DirectoryList } func (dirlist *DirectoryList) Select(name string) { dirlist.selecting = name dirlist.cancel() dirlist.ctx, dirlist.cancel = context.WithCancel(context.Background()) delay := dirlist.UiConfig(name).DirListDelay go func(ctx context.Context) { defer log.PanicHandler() select { case <-time.After(delay): dirlist.worker.PostAction(&types.OpenDirectory{ Context: ctx, Directory: name, }, func(msg types.WorkerMessage) { switch msg := msg.(type) { case *types.Error: dirlist.selecting = "" log.Errorf("(%s) couldn't open directory %s: %v", dirlist.acctConf.Name, name, msg.Error) case *types.Cancelled: log.Debugf("OpenDirectory cancelled") } }) case <-ctx.Done(): log.Tracef("dirlist: skip %s", name) return } }(dirlist.ctx) } func (dirlist *DirectoryList) Selected() string { return dirlist.selected } func (dirlist *DirectoryList) Invalidate() { ui.Invalidate() } // Returns the Recent, Unread, and Exist counts for the named directory func (dirlist *DirectoryList) GetRUECount(name string) (int, int, int) { dir := dirlist.Directory(name) if dir == nil { return 0, 0, 0 } return dir.Recent, dir.Unseen, dir.Exists } func (dirlist *DirectoryList) Draw(ctx *ui.Context) { uiConfig := dirlist.UiConfig("") ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', uiConfig.GetStyle(config.STYLE_DIRLIST_DEFAULT)) if dirlist.spinner.IsRunning() { dirlist.spinner.Draw(ctx) return } if len(dirlist.dirs) == 0 { style := uiConfig.GetStyle(config.STYLE_DIRLIST_DEFAULT) ctx.Printf(0, 0, style, uiConfig.EmptyDirlist) return } dirlist.UpdateScroller(ctx.Height(), len(dirlist.dirs)) dirlist.EnsureScroll(findString(dirlist.dirs, dirlist.selecting)) textWidth := ctx.Width() if dirlist.NeedScrollbar() { textWidth -= 1 } if textWidth < 0 { return } listCtx := ctx.Subcontext(0, 0, textWidth, ctx.Height()) data := state.NewDataSetter() data.SetAccount(dirlist.acctConf) for i, name := range dirlist.dirs { if i < dirlist.Scroll() { continue } row := i - dirlist.Scroll() if row >= ctx.Height() { break } data.SetFolder(dirlist.Directory(name)) data.SetRUE([]string{name}, dirlist.GetRUECount) left, right, style := dirlist.renderDir( name, uiConfig, data.Data(), name == dirlist.selecting, listCtx.Width(), ) listCtx.Printf(0, row, style, "%s %s", left, right) } if dirlist.NeedScrollbar() { scrollBarCtx := ctx.Subcontext(ctx.Width()-1, 0, 1, ctx.Height()) dirlist.drawScrollbar(scrollBarCtx) } } func (dirlist *DirectoryList) renderDir( path string, conf *config.UIConfig, data models.TemplateData, selected bool, width int, ) (string, string, tcell.Style) { var left, right string var buf bytes.Buffer var styles []config.StyleObject var style tcell.Style r, u, _ := dirlist.GetRUECount(path) if u > 0 { styles = append(styles, config.STYLE_DIRLIST_UNREAD) } if r > 0 { styles = append(styles, config.STYLE_DIRLIST_RECENT) } conf = conf.ForFolder(path) if selected { style = conf.GetComposedStyleSelected( config.STYLE_DIRLIST_DEFAULT, styles) } else { style = conf.GetComposedStyle( config.STYLE_DIRLIST_DEFAULT, styles) } err := templates.Render(conf.DirListLeft, &buf, data) if err != nil { log.Errorf("dirlist-left: %s", err) left = err.Error() style = conf.GetStyle(config.STYLE_ERROR) } else { left = buf.String() } buf.Reset() err = templates.Render(conf.DirListRight, &buf, data) if err != nil { log.Errorf("dirlist-right: %s", err) right = err.Error() style = conf.GetStyle(config.STYLE_ERROR) } else { right = buf.String() } buf.Reset() lbuf := parse.ParseANSI(left) lbuf.ApplyAttrs(style) lwidth := lbuf.Len() rbuf := parse.ParseANSI(right) rbuf.ApplyAttrs(style) rwidth := rbuf.Len() if lwidth+rwidth+1 > width { if rwidth > 3*width/4 { rwidth = 3 * width / 4 } lwidth = width - rwidth - 1 right = rbuf.TruncateHead(rwidth, '…') left = lbuf.Truncate(lwidth-1, '…') } else { for i := 0; i < (width - lwidth - rwidth - 1); i += 1 { lbuf.Write(' ', tcell.StyleDefault) } left = lbuf.String() right = rbuf.String() } return left, right, style } func (dirlist *DirectoryList) drawScrollbar(ctx *ui.Context) { gutterStyle := tcell.StyleDefault pillStyle := tcell.StyleDefault.Reverse(true) // gutter ctx.Fill(0, 0, 1, ctx.Height(), ' ', gutterStyle) // pill pillSize := int(math.Ceil(float64(ctx.Height()) * dirlist.PercentVisible())) pillOffset := int(math.Floor(float64(ctx.Height()) * dirlist.PercentScrolled())) ctx.Fill(0, pillOffset, 1, pillSize, ' ', pillStyle) } func (dirlist *DirectoryList) MouseEvent(localX int, localY int, event tcell.Event) { if event, ok := event.(*tcell.EventMouse); ok { switch event.Buttons() { case tcell.Button1: clickedDir, ok := dirlist.Clicked(localX, localY) if ok { dirlist.Select(clickedDir) } case tcell.WheelDown: dirlist.Next() case tcell.WheelUp: dirlist.Prev() } } } func (dirlist *DirectoryList) Clicked(x int, y int) (string, bool) { if dirlist.dirs == nil || len(dirlist.dirs) == 0 { return "", false } for i, name := range dirlist.dirs { if i == y { return name, true } } return "", false } func (dirlist *DirectoryList) NextPrev(delta int) { curIdx := findString(dirlist.dirs, dirlist.selecting) if curIdx == len(dirlist.dirs) { return } newIdx := curIdx + delta ndirs := len(dirlist.dirs) if ndirs == 0 { return } if newIdx < 0 { newIdx = ndirs - 1 } else if newIdx >= ndirs { newIdx = 0 } dirlist.Select(dirlist.dirs[newIdx]) } func (dirlist *DirectoryList) Next() { dirlist.NextPrev(1) } func (dirlist *DirectoryList) Prev() { dirlist.NextPrev(-1) } func folderMatches(folder string, pattern string) bool { if len(pattern) == 0 { return false } if pattern[0] == '~' { r, err := regexp.Compile(pattern[1:]) if err != nil { return false } return r.Match([]byte(folder)) } return pattern == folder } // sortDirsByFoldersSortConfig sets dirlist.dirs to be sorted based on the // AccountConfig.FoldersSort option. Folders not included in the option // will be appended at the end in alphabetical order func (dirlist *DirectoryList) sortDirsByFoldersSortConfig() { if !dirlist.acctConf.EnableFoldersSort { return } sort.Slice(dirlist.dirs, func(i, j int) bool { foldersSort := dirlist.acctConf.FoldersSort iInFoldersSort := findString(foldersSort, dirlist.dirs[i]) jInFoldersSort := findString(foldersSort, dirlist.dirs[j]) if iInFoldersSort >= 0 && jInFoldersSort >= 0 { return iInFoldersSort < jInFoldersSort } if iInFoldersSort >= 0 { return true } if jInFoldersSort >= 0 { return false } return dirlist.dirs[i] < dirlist.dirs[j] }) } // filterDirsByFoldersConfig sets dirlist.dirs to the filtered subset of the // dirstore, based on AccountConfig.Folders (inclusion) and // AccountConfig.FoldersExclude (exclusion), in that order. func (dirlist *DirectoryList) filterDirsByFoldersConfig() { dirlist.dirs = dirlist.store.List() // 'folders' (if available) is used to make the initial list and // 'folders-exclude' removes from that list. configFolders := dirlist.acctConf.Folders dirlist.dirs = dirlist.FilterDirs(dirlist.dirs, configFolders, false) configFoldersExclude := dirlist.acctConf.FoldersExclude dirlist.dirs = dirlist.FilterDirs(dirlist.dirs, configFoldersExclude, true) } // FilterDirs filters directories by the supplied filter. If exclude is false, // the filter will only include directories from orig which exist in filters. // If exclude is true, the directories in filters are removed from orig func (dirlist *DirectoryList) FilterDirs(orig, filters []string, exclude bool) []string { if len(filters) == 0 { return orig } var dest []string for _, folder := range orig { // When excluding, include things by default, and vice-versa include := exclude for _, f := range filters { if folderMatches(folder, f) { // If matched an exclusion, don't include // If matched an inclusion, do include include = !exclude break } } if include { dest = append(dest, folder) } } return dest } func (dirlist *DirectoryList) SelectedMsgStore() (*lib.MessageStore, bool) { return dirlist.store.MessageStore(dirlist.selected) } func (dirlist *DirectoryList) MsgStore(name string) (*lib.MessageStore, bool) { return dirlist.store.MessageStore(name) } func (dirlist *DirectoryList) SelectedDirectory() *models.Directory { return dirlist.store.Directory(dirlist.selected) } func (dirlist *DirectoryList) Directory(name string) *models.Directory { return dirlist.store.Directory(name) } func (dirlist *DirectoryList) SetMsgStore(dir *models.Directory, msgStore *lib.MessageStore) { dirlist.store.SetMessageStore(dir, msgStore) msgStore.OnUpdateDirs(func() { dirlist.Invalidate() }) } func findString(slice []string, str string) int { for i, s := range slice { if str == s { return i } } return -1 }