Neovim/lua/plugins/cokeline.lua

return {
   {
        "willothy/nvim-cokeline",
        config = true,
        opts = {
            fill_hl = "NeoTreeTabInactive",
            show_if_buffers_are_at_least = 1,
            buffers = {
                focus_on_delete = "next",
                new_buffers_position = 'last',
            },
            mappings = {
                disable_mouse = false,
            },
            default_hl = {
                bg = function(buffer)
                    if buffer.is_focused then
                        return "NeoTreeTabActive"
                    end
                    return "NeoTreeTabInactive"
                end,
                fg = function(buffer)
                    if buffer.is_focused then
                        return "NeoTreeTabActive"
                    end
                    return "NeoTreeTabInactive"
                end,
            },
            components = {
                {
                    text = function (buffer)
                        local text = ' '
                        if buffer.is_focused then
                            text = '▎'
                        end
                        return text
                    end,
                    fg = function(buffer) return buffer.devicon.color end
                },
                {
                    text = function(buffer) return buffer.devicon.icon end,
                    fg = function(buffer) return buffer.devicon.color end,
                },
                {
                    text = function(buffer) return buffer.filename .. ' ' end,
                    fg = function (buffer)
                        if buffer.is_focused then
                            if buffer.diagnostics.errors > 0 then
                                return "DiagnosticError"
                            elseif buffer.diagnostics.warnings > 0 then
                                return "DiagnosticWarn"
                            elseif buffer.diagnostics.infos > 0 then
                                return "DiagnosticInfo"
                            elseif buffer.diagnostics.hints > 0 then
                                return "DiagnosticHint"
                            end
                        else
                            return 'NeoTreeTabInactive'
                        end
                    end
                },
                -- show icon and number of diagnostics if there are more than one
                {
                    text = function (buffer)
                        local errors = buffer.diagnostics.errors
                        if errors > 0 then
                            return require("options").lsp.icons.Error .. errors .. ' '
                        end
                        return ''
                    end,
                    fg = "DiagnosticError"
                },
                {
                    text = function (buffer)
                        local warns = buffer.diagnostics.warnings
                        if warns > 0 then
                            return require("options").lsp.icons.Warn .. warns .. ' '
                        end
                        return ''
                    end,
                    fg = function (buffer)
                        if not buffer.is_focused then
                            return 'NeoTreeTabInactive'
                        end
                        return "DiagnosticWarn"
                    end
                },
                {
                    text = function (buffer)
                        local infos = buffer.diagnostics.infos
                        if infos > 0 then
                            return require("options").lsp.icons.Info .. infos .. ' '
                        end
                        return ''
                    end,
                    fg = function (buffer)
                        if not buffer.is_focused then
                            return 'NeoTreeTabInactive'
                        end
                        return "DiagnosticInfo"
                    end
                },
                {
                    text = function (buffer)
                        local hints = buffer.diagnostics.hints
                        if hints > 0 then
                            return require("options").lsp.icons.Hint .. hints .. ' '
                        end
                        return ''
                    end,
                    fg = function (buffer)
                        if not buffer.is_focused then
                            return 'NeoTreeTabInactive'
                        end
                        return "DiagnosticHint"
                    end
                },
                {
                    text = ' ',
                },
                {
                    text = function(buffer)
                        local text = "󰅖"
                        if buffer.is_modified then
                            text = ''
                        elseif buffer.is_readonly then
                            text = ''
                        end

                        return text .. ' '
                    end,
                    on_click = function(_, _, _, _, buffer)
                        buffer:delete()
                    end
                }
            },
            tabs = {
                placement = "right",
                components = {
                    {
                        text = function(tabpage)
                            return ' ' .. tabpage.number .. ' '
                        end,
                        bg = function(tabpage)
                            if tabpage.is_active then
                                return "NeoTreeTabActive"
                            end
                            return "NeoTreeTabInactive"
                        end,
                        fg = function(tabpage)
                            if tabpage.is_active then
                                return "NeoTreeTabActive"
                            end
                            return "NeoTreeTabInactive"
                        end
                    },
                    {
                        text = function(tabpage)
                            if tabpage.is_active then
                                return "󰅙 "
                            end
                            return ""
                        end,
                        on_click = function(_, _, _, _, tabpage)
                            tabpage:close()
                        end,
                        bg = function(_)
                            return "NeoTreeTabActive"
                        end,
                        fg = function(_)
                            return "NeoTreeTabActive"
                        end
                    }
                },
            },
            sidebar = {
                filetype = { "NvimTree", "neo-tree", "SidebarNvim" },
                components = {
                    {
                        text = "",
                        bg = "NeoTreeTabInactive",
                        fg = "NeoTreeTabInactive"
                    }
                },
            },
        }
    }
}