TweetFollow Us on Twitter

May 92 - Software Review - Userland Frontier

Software Review - Userland Frontier

John W. Baxter

In late January, Dave Winer and the rest of the folks at Userland shipped version 1.0 of Frontier. Frontier is a tool with which you can operate the growing number of modern Macintosh applications which can be controlled by sending them suitable Apple Events. Frontier also provides a clean-looking method by which very easily changed menus can be added to an AppleEvent-savvy application (this feature is called "Menu Sharing"). Here is a brief look at Frontier.

Drive those Applications

Frontier has an easy-to-use scripting language which controls both Frontier and other AppleEvent-aware applications. The language is presented in outline form, and Frontier has a good outline editor. The structure of a script is created by the levels of the outline. For example, here is an if statement:
if people.JWB.age > 50
    msg ("John, you are getting old.")
else
    msg ("Come on, John, tell the truth")

The statements controlled by the true branch of the if statement (here, just a msg verb) are indented one outline level inferior to the if. The next statement at the same level as the if marks the end of the controlled statements. Here, that statement is an else. Again, the else controls those statements inferior to it in the outline. As with outlining programs in general, you can hide the details and see only the if and else lines if you like.

The supplied language verbs include many which are implemented in the Frontier kernel and many others which are simply scripts themselves. A full list is well beyond the scope of this column, but one handy structure for script writing is

   on explore(path)
    fileloop (aFile in path)
        if (file.isFolder(aFile))
            explore(aFile)
        else
            « do something to each aFile
            « the « introduces comments

where path identifies an HFS directory, and aFile takes on the path to each file and directory contained in that directory. You can easily recurse down through the directory levels, as shown. The on construct introduces a script (routine).

The outlining capability is useful in its own right, but is limited to single-line headers. The outline editor is fully scriptable. There is also a simple word processing editor, and word processing documents can be maintained within Frontier. That editor is suitable for writing documentation about your Frontier scripts-it is not suitable for the next great novel. The word processing editor is also fully scriptable.

Things are stored in Frontier in a database, managed as a hierarchy of tables starting at a table called root. One of the items in the root table is a table called people, which has items named with the initials of each user of a given Frontier. The first example above assumes that my table, whose full address is root.people.JWB, contains an entry named age whose value is a number. A table entry consists of a name and a value. The value may be as simple as a number or string or as complex as a word processing document, an outline or script, or any Macintosh structure stored in binary form. The set of table manipulation verbs is fully scriptable.

Whose Menus are They, Anyhow

Using AppleEvents, an application can arrange for Frontier to supply one or more menus (which can include hierarchical submenus). A simple but solid-looking protocol provides for the application to inform Frontier of selections of the items in the menus Frontier has defined. The user provides a Frontier script for each such item. That script will usually send one or more AppleEvents to the application requesting services or directing actions. Provision is made for the user to edit the menus within Frontier and for the menus to be adjusted before the next time they are pulled down by the user if they have been edited. If Frontier shuts down, the application is notified and deletes the shared menus; if Frontier launches while a menu-sharing application is running, the menus get added.

Additionally, most of Frontier's own menus are fully editable by the user. Again, each item has a script associated with it. The outline editor (slightly modified) is used to edit menus and assign the scripts.

Userland supplies source code in C for the routines that need to be added to an application to support menu sharing. I've looked at MacApp 3.0, and at this writing I have a working subclass of TApplication which supports Frontier menu sharing. Unfortunately, that subclass is not yet ready for publication.

Agent 86

One of the tables in Frontier contains "agents". These agents are scripts which receive time periodically from Frontier. Frontier ships with an agent which updates a clock in Frontier's main window. An agent can trigger arbitrarily complex scripts. Frontier is pretty good about giving processing time to agents-for example, the agents are given time while Frontier is in the background awaiting a reply to an AppleEvent it sent out as requested by a script.

Almost Faceless Mini-Applications ("Appletts")

Frontier makes sense as a controller for small, nearly faceless applications which provide simple services. This is one of the directions software is moving at the moment, the do-one-thing-and-do-it-well idea. Userland practices what they preach in this area: Frontier's on-line documentation is provided by a separate DocServer application. A control-double-click on any Frontier verb ensures that DocServer is running, sends it AppleEvents directing that the appropriate documentation be displayed, and brings DocServer to the front. There is no technical reason why DocServer wouldn't be available to your application, too. I don't know the legal details at this time.

Paper Documentation

Yes, there is some. A user manual and a scripting language ("UserTalk") reference guide were written by Dan Shafer. They explain Frontier pretty clearly, though some of the more obscure verbs are only referenced, with the DocServer material (also prepared by Dan) being the only documentation.

Apple Object Model

Frontier scripts have the power to create and send AppleEvents which make use of the Object Model. This capability should be highly useful in testing MacApp-based applications which support the Object Model and the Object Support Library. A developer may also wish to supply a suitable "suite" of Frontier scripts to the users of an application.

What's In It for Me?

If you are writing an AppleEvent-driven application, Frontier represents a potentially valuable testing and debugging tool. If your application might benefit from the shared menu idea, that is easy to add. With or without Frontier, you were going to support AppleEvents for commanding your application, weren't you? There is no extra work there (and Userland will help you prepare the file which sets up the necessary verbs in Frontier to drive your application the way you want it driven).

Besides all that, Frontier is an amusing "toy", too. I have a script which runs my FarSide calendar the first time each day that Frontier starts up (I have Frontier starting from my Startup Items folder).

Availability

Frontier is available direct from Userland. Recently, Frontier has also found its way into the mail order and retail distribution system. Userland can be found in the Third Party area on AppleLink and in their own forum on CompuServe. Their address is UserLand Software, Inc., 490 California Ave, Palo Alto, CA 94306. Telephone (415) 325-5700; fax (415) 325-9829.
 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Parallels Desktop 10.2.0 - Run Windows a...
Parallels Desktop is simply the world's bestselling, top-rated, and most trusted solution for running Windows applications on your Mac. With Parallels Desktop for Mac, you can seamlessly run both... Read more
LaunchBar 6.2 - Powerful file/URL/email...
LaunchBar is an award-winning productivity utility that offers an amazingly intuitive and efficient way to search and access any kind of information stored on your computer or on the Web. It provides... Read more
Firefox 37.0 - Fast, safe Web browser. (...
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
Arq 4.11 - Online backup to Google Drive...
Arq is super-easy online backup for the Mac. Back up to your own Google Drive storage (15GB free storage), your own Amazon Glacier ($.01/GB per month storage) or S3, or any SFTP server. Arq backs up... Read more
MacFamilyTree 7.3.4 - Create and explore...
MacFamilyTree gives genealogy a facelift: it's modern, interactive, incredibly fast, and easy to use. We're convinced that generations of chroniclers would have loved to trade in their genealogy... Read more
Yummy FTP 1.10.2 - FTP/SFTP/FTPS client...
Yummy FTP is an FTP + SFTP + FTPS file transfer client which focuses on speed, reliability and productivity. Whether you need to transfer a few files or a few thousand, schedule automatic backups, or... Read more
VueScan 9.5.08 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
Iridient Developer 3.0.1 - Powerful imag...
Iridient Developer (was RAW Developer) is a powerful image conversion application designed specifically for OS X. Iridient Developer gives advanced photographers total control over every aspect of... Read more
Monodraw 0.8.4.1 - Powerful ASCII art ed...
Monodraw allows you to easily create text-based art (like diagrams, layouts, flow charts) and visually represent algorithms, data structures, binary formats and more. Because it's all just text, it... Read more
Air Video Server HD 2.1.0 - Stream video...
Air Video Server HD streams videos instantly from your computer on your iPhone, iPad, iPod touch or Apple TV. No need to worry about converting or transferring files. We took everything that was... Read more

Marvel Mighty Heroes, the Ultimate Marve...
DeNA and Marvel Entertainment have brought us a new action-packed brawler: Marvel Mighty Heroes. You can play with up to four of your friends as you favorite marvel heroes like Iron Man, Thor, Spider-Man, Captain America, Star-Lord, Hulk, and... | Read more »
Take Note - The Jot Script 2 Evernote Ed...
Adonit's Jot Script 2 sylus has an all-new edition that's meant to be Evernote's BFF. The sylus has been redesigned to work better with iPads and give you faster stroke tracking, smoother line rendering, and better tip-to-line accuracy. | Read more »
INFINIT Lets Mobile Users Send Files of...
Infinit  is a file sharing app that ignores file size limits. It maintains the original quality of your photos and videos so you can be sure they look awesome after sending. You can move entire albums of photos or full HD films from your iPhone to... | Read more »
Serious Sam Double D Developer is Making...
There's nothing like the thrill of watching a horse race, especially when the horses are drunk.  | Read more »
2K Announces WWE 2K, Mobile's First...
It seems like this month has been pretty big for wrestling. First Wrestlemania, then 2K has announces that they're releasing  WWE 2K for iOS. It's a simulation-based WWE game where you'll get to play with several WWE superstars such as John Cena, ... | Read more »
How the Apple Watch Could Change the Fac...
The Apple Watch is still a ways out, but my previous musings on the wearable’s various features got me thinking: what might it be like a year after launch? Two years? Five years? What if it becomes a symbiotic part of the iOS framework to the point... | Read more »
You Can Start Challenging Your Friends t...
Last year we reported that Sebastian Gosztyla's new game, Dual, was theorized to be released sometime during the summer of 2014. Sadly that did not become a reality, but the good news it there is now an official release date. | Read more »
Forgotten Memories : Alternate Realities...
Forgotten Memories : Alternate Realities, from Psychoz Interactive, is planned for release on April 23. The Resident Evil, Silent Hill, and Alone in the Dark inspired horror game puts you in the shoes of Rose Hawkins as she searches for a missing... | Read more »
Pie In The Sky: A Pizza Odyssey (Games)
Pie In The Sky: A Pizza Odyssey 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: A game about delivering pizza. In space. | Read more »
Chosen Gives Hopeful Singers, Songwriter...
If YouTube videos and reality TV shows like The Voice have taught us one thing, it’s that there are a lot of people out there who are anxious to show the world their talents. And if they’ve taught us a second thing, it’s that there’s an almost... | Read more »

Price Scanner via MacPrices.net

Will Microsoft’s Surface 3 Give The 12-inch M...
The more I ruminate over the new 12-inch MacBook, the more it occurs that it’s probably going to be more of a cannibalization threat to high-end iPads (including a new 12-inch ‘Pad when/if that... Read more
13-inch 2.4GHz Retina MacBook Pro available f...
MacMall has the 2013 13″ 2.4GHz/128GB Retina MacBook Pro available for $949.99 for a limited time. Shipping is free. Their price is $350 off original MSRP, and it’s the only sub-$1000 new Retina... Read more
Adobe Brings Powerful Layout-Design Capabilit...
Adobe today announced the availability of Adobe Comp CC, a free iPad app that enables rapid creation of layout concepts for mobile, Web and print projects. With Comp CC, designers can rough out and... Read more
13-inch 2.6GHz/256GB Retina MacBook Pro avail...
Best Buy has clearance 2014 13″ 2.6GHz/256GB Retina MacBook Pros available for $1199.99 including free shipping. Their price is $300 off original MSRP, and it’s the lowest price for this model.... Read more
Updated Mac Price Trackers
We’ve updated our Mac Price Trackers with the latest information on prices, bundles, and availability on systems from Apple’s authorized internet/catalog resellers: - 15″ MacBook Pros - 13″ MacBook... Read more
21-inch 1.4GHz iMac on sale for $999, save $1...
Best Buy has the 21″ 1.4GHz iMac on sale for $999.99 on their online store. Choose free shipping or free local store pick up. Price is for online orders only, in-store prices may vary. Their price is... Read more
2.6GHz Mac mini on sale for $649, save $50
Amazon has the 2.6GHz Mac mini on sale for $649.99 including free shipping. Their price is $50 off MSRP, and it’s the lowest price available for this model. Read more
Textkraft Professional 3.2 Powerful iPad Text...
Finally it’s springtime, at least theoretically in my neck of the woods, where we’re still navigating canyons between towering snowbanks with temperatures well below freezing in winter weather that... Read more
Apple offering refurbished 27-inch 5K iMacs f...
The Apple Store is offering Apple Certified Refurbished 27″ 3.5GHz 5K iMacs for $2119 including free shipping. Their price is $380 off the price of new models, and it’s the lowest price available for... Read more
16GB iPad mini on sale for $199, save $50
Walmart has 16GB iPad minis (1st generation) available for $199.99 on their online store, including free shipping. Their price is $50 off MSRP. Online orders only. Read more

Jobs Board

DevOps Software Engineer - *Apple* Pay, iOS...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Sr. Technical Services Consultant, *Apple*...
**Job Summary** Apple Professional Services (APS) has an opening for a senior technical position that contributes to Apple 's efforts for strategic and transactional Read more
Lead *Apple* Solutions Consultant - Retail...
**Job Summary** Job Summary The Lead ASC is an Apple employee who serves as the Apple business manager and influencer in a hyper-business critical Reseller's store Read more
*Apple* Pay - Site Reliability Engineer - Ap...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.