have visual refs working and better error models

src/collections.js

@@ -0,0 +1,5 @@
+var CommitCollection = Backbone.Collection.extend({
+  model: Commit
+});
+
+var commitCollection = new CommitCollection();

src/commandline.js

@@ -37,22 +37,24 @@ Command.prototype.getRegexMap = function() {
 Command.prototype.getSandboxCommands = function() {
   return [
     [/^ls/, function() {
-      throw new CommandResult("\
-        DontWorryAboutFilesInThisDemo.txt\
-      ");
+      throw new CommandResult({
+        msg: "DontWorryAboutFilesInThisDemo.txt"
+      });
     }],
     [/^cd/, function() {
-      throw new CommandResult("\
-        Directory Changed to '/directories/dont/matter/in/this/demo' \
-      ");
+      throw new CommandResult({
+        msg: "Directory Changed to '/directories/dont/matter/in/this/demo'"
+      });
     }],
     [/^git$/, function() {
-      throw new CommandResult(_.escape("\
+      throw new CommandResult({
+        msg: _.escape("\
           Git Version \n \
           PCOTTLE.1.0 \
           Usage: \n \
             git <command> [<args>] \
-      "));
+        ")
+      });
     }]
   ];
 };
@@ -60,7 +62,7 @@ Command.prototype.getSandboxCommands = function() {
 Command.prototype.parse = function(str) {
   // first if the string is empty, they just want a blank line
   if (!str.length) {
-    throw new CommandResult("");
+    throw new CommandResult({msg: ""});
   }
 
   // then check if it's one of our sandbox commands
@@ -82,7 +84,9 @@ Command.prototype.parse = function(str) {
 
   // see if begins with git
   if (str.slice(0,3) !== 'git') {
-    throw new CommandProcessError('Git commands only, sorry!');
+    throw new CommandProcessError({
+      msg: 'Git commands only, sorry!'
+    });
   }
 
   // ok, we have a (probably) valid command. actually parse it
@@ -106,9 +110,9 @@ Command.prototype.gitParse = function(str) {
   }, this);
 
   if (!matched) {
-    throw new CommandProcessError(
-      "Sorry, this demo does not support that git command: " + this.fullCommand
-    );
+    throw new CommandProcessError({
+      msg: "Sorry, this demo does not support that git command: " + this.fullCommand
+    });
   }
 
   this.optionParser = new OptionParser(this.method, this.options);
@@ -170,7 +174,9 @@ OptionParser.prototype.explodeAndSet = function() {
     if (part.slice(0,1) == '-') {
       // it's an option, check supportedMap
       if (this.supportedMap[part] === undefined) {
-        throw new CommandProcessError('The option "' + part + '" is not supported');
+        throw new CommandProcessError({
+          msg: 'The option "' + part + '" is not supported'
+        });
       }
 
       // go through and include all the next args until we hit another option or the end

src/constants.js

@@ -20,10 +20,21 @@ var graphics = {
   edgeStroke: 'rgba(94%, 96%, 98%, 0.5)', // '#EFF5FB',
   nodeEdge: 'rgba(94%, 96%, 98%, 0.9)', // '#EFF5FB',
   nodeFill: '#0066cc',
+  nodeRadius: 10,
 
   // widths
   nodeStrokeWidth: 15,
   edgeWidth: 2,
+
+  // ref names
+  refFont: '14pt Courier New',
+  refFontFill: '#FFF',
+
+  // ref arrows
+  arrowFill: '#FFF',
+  arrowStroke: '#000',
+  arrowWidth: 4,
+  arrowHeadWidth: 5
 };
 
 function randomString(string_length) {

src/errors.js

@@ -1,31 +1,35 @@
-function CommandProcessError(msg) {
-  this.msg = msg; 
+var MyError = Backbone.Model.extend({
+  defaults: {
+    type: 'MyError',
+    msg: 'Unknown Error'
+  },
+  toString: function() {
+    return this.get('type') + ': ' + this.get('msg');
+  },
+
+  getMsg: function() {
+    return this.get('msg') || 'Unknown Error';
+  },
+
+  toResult: function() {
+    return this.get('msg').replace('\n', '</br>');
   }
+});
 
-CommandProcessError.prototype.toString = function() {
-  return 'Command Process Error: ' + this.msg;
-};
-
-CommandProcessError.prototype.toResult = function() {
-  return this.msg.replace('\n', '</br>');
-};
-
-function CommandResult(msg) {
-  this.msg = msg; 
+var CommandProcessError = MyError.extend({
+  defaults: {
+    type: 'Command Process Error'
   }
+});
 
-CommandResult.prototype.toString = function() {
-  return 'Command Result: ' + this.msg;
-};
-
-CommandResult.prototype.toResult = function() {
-  return this.msg.replace('\n', '</br>');
-};
-
-function GitError(msg) {
-  this.msg = msg;
+var CommandResult = MyError.extend({
+  defaults: {
+    type: 'Command Result'
   }
+});
 
-GitError.prototype.toString = function() {
-  return 'Git Error: ' + this.msg;
-};
+var GitError = MyError.extend({
+  defaults: {
+    type: 'Git Error'
+  }
+});

src/git.js

@@ -13,6 +13,7 @@ function GitEngine() {
   this.HEAD = null;
   this.id_gen = 0;
   this.branches = [];
+  this.collection = commitCollection;
 
   // global variable to keep track of the options given
   // along with the command call.
@@ -27,6 +28,8 @@ function GitEngine() {
 GitEngine.prototype.init = function() {
   // make an initial commit and a master branch
   this.rootCommit = new Commit({rootCommit: true});
+  commitCollection.add(this.rootCommit);
+
   this.refs[this.rootCommit.get('id')] = this.rootCommit;
 
   var master = this.makeBranch('master', this.rootCommit);
@@ -50,10 +53,14 @@ GitEngine.prototype.getDetachedHead = function() {
 GitEngine.prototype.validateBranchName = function(name) {
   name = name.replace(/\s/g, ''); 
   if (!/^[a-zA-Z0-9]+$/.test(name)) {
-    throw new Error('woah bad branch name!! This is not ok: ' + name);
+    throw new GitError({
+      msg: 'woah bad branch name!! This is not ok: ' + name
+    });
   }
   if (/[hH][eE][aA][dD]/.test(name)) {
-    throw new Error('branch name of "head" is ambiguous, dont name it that');
+    throw new GitError({
+      msg: 'branch name of "head" is ambiguous, dont name it that'
+    });
   }
   return name;
 };
@@ -61,7 +68,9 @@ GitEngine.prototype.validateBranchName = function(name) {
 GitEngine.prototype.makeBranch = function(id, target) {
   id = this.validateBranchName(id);
   if (this.refs[id]) {
-    throw new Error('that branch id already exists!');
+    throw new GitError({
+      msg: 'that branch id already exists!'
+    });
   }
 
   var branch = new Branch({
@@ -73,18 +82,34 @@ GitEngine.prototype.makeBranch = function(id, target) {
   return branch;
 };
 
+GitEngine.prototype.getHead = function() {
+  return _.clone(this.HEAD);
+};
+
 GitEngine.prototype.getBranches = function() {
   var toReturn = [];
   _.each(this.branches, function(branch) {
     toReturn.push({
       id: branch.get('id'),
-      selected: this.HEAD.get('target') === branch
+      selected: this.HEAD.get('target') === branch,
+      target: branch.get('target')
     });
   }, this);
   return toReturn;
 };
 
 GitEngine.prototype.printBranches = function() {
+  var branches = this.getBranches();
+  var result = '';
+  _.each(branches, function(branch) {
+    result += (branch.selected ? '* ' : '') + branch.id + '\n';
+  });
+  throw new CommandResult({
+    msg: result
+  });
+};
+
+GitEngine.prototype.logBranches = function() {
   var branches = this.getBranches();
   _.each(branches, function(branch) {
     console.log((branch.selected ? '* ' : '') + branch.id);
@@ -96,12 +121,15 @@ GitEngine.prototype.makeCommit = function(parent) {
     parents: [parent]
   });
   this.refs[commit.get('id')] = commit;
+  this.collection.add(commit);
   return commit;
 };
 
 GitEngine.prototype.acceptNoGeneralArgs = function() {
   if (this.generalArgs.length) {
-    throw new GitError("That command accepts no general arguments");
+    throw new GitError({
+      msg: "That command accepts no general arguments"
+    });
   }
 };
 
@@ -167,10 +195,14 @@ GitEngine.prototype.resolveStringRef = function(ref) {
   }, this);
 
   if (!startRef) {
-    throw new Error('unknown ref ' + ref);
+    throw new GitError({
+      msg: 'unknown ref ' + ref
+    });
   }
   if (!this.refs[startRef]) {
-    throw new Error('the ref ' + startRef +' does not exist.');
+    throw new GitError({
+      msg: 'the ref ' + startRef +' does not exist.'
+    });
   }
   var commit = this.getCommitFromRef(startRef);
 
@@ -224,14 +256,18 @@ GitEngine.prototype.numBackFrom = function(commit, numBack) {
   }
 
   if (numBack !== 0 || pQueue.length == 0) {
-    throw new Error('exhausted search, sorry');
+    throw new GitError({
+      msg: "Sorry, I can't go that many commits back"
+    });
   }
   return pQueue.shift(0);
 };
 
 GitEngine.prototype.checkoutStarter = function() {
   if (this.generalArgs.length != 1) {
-    throw new GitError('I expect one argument along with git checkout (dont reference files)');
+    throw new GitError({
+      msg: 'I expect one argument along with git checkout (dont reference files)'
+    });
   }
 
   this.checkout(this.generalArgs[0]);
@@ -249,7 +285,9 @@ GitEngine.prototype.checkout = function(idOrTarget) {
 
   var type = target.get('type');
   if (type !== 'branch' && type !== 'commit') {
-    throw new Error('can only checkout branches and commits!');
+    throw new GitError({
+      msg: 'can only checkout branches and commits!'
+    });
   }
 
   this.HEAD.set('target', target);
@@ -259,7 +297,9 @@ GitEngine.prototype.branchStarter = function() {
   // handle deletion first
   if (this.commandOptions['-d'] || this.commandOptions['-D']) {
     if (!this.generalArgs.length) {
-      throw new GitError('I expect branch names when deleting');
+      throw new GitError({
+        msg: 'I expect branch names when deleting'
+      });
     }
     _.each(this.generalArgs, function(name) {
       this.deleteBranch(name);
@@ -269,11 +309,14 @@ GitEngine.prototype.branchStarter = function() {
 
   var len = this.generalArgs.length;
   if (len > 2) {
-    throw new GitError('git branch with more than two general args does not make sense!');
+    throw new GitError({
+      msg: 'git branch with more than two general args does not make sense!'
+    });
   }
+
+
   if (len == 0) {
-    throw new Error('going to implement eventually');
-    //TODO: print branches, etc
+    this.printBranches();
     return;
   }
   
@@ -293,13 +336,19 @@ GitEngine.prototype.deleteBranch = function(name) {
   // trying to delete, lets check our refs
   var target = this.resolveId(name);
   if (target.get('type') !== 'branch') {
-    throw new GitError("You can't delete things that arent branches with branch command");
+    throw new GitError({
+      msg: "You can't delete things that arent branches with branch command"
+    });
   }
   if (target.get('id') == 'master') {
-    throw new GitError("You can't delete the master branch!");
+    throw new GitError({
+      msg: "You can't delete the master branch!"
+    });
   }
   if (this.HEAD.get('target') === target) {
-    throw new GitError("Cannot delete the branch you are currently on");
+    throw new GitError({
+      msg: "Cannot delete the branch you are currently on"
+    });
   }
 
   var id = target.get('id');
@@ -315,10 +364,10 @@ GitEngine.prototype.dispatch = function(commandObj) {
 };
 
 GitEngine.prototype.add = function() {
-  throw new Error(
-    "This demo is meant to demonstrate git branching, so don't worry about " +
+  throw new CommandResult({
+    msg: "This demo is meant to demonstrate git branching, so don't worry about " +
          "adding / staging files. Just go ahead and commit away!"
-  );
+  });
 };
 
 GitEngine.prototype.execute = function(command, callback) {
@@ -401,7 +450,6 @@ var Commit = Backbone.Model.extend({
   initialize: function() {
     this.validateAtInit();
     this.addNodeToVisuals();
-    console.log('MAKING NEW COMMIT', this.get('id'));
 
     _.each(this.get('parents'), function(parent) {
       parent.get('children').push(this);

src/index.html

@@ -51,5 +51,7 @@
   <script src="commandline.js"></script>
   <script src="views.js"></script>
   <script src="errors.js"></script>
+  <script src="collections.js"></script>
+  <script src="visuals.js"></script>
 </body>
 </html>

src/legacy.js

@@ -39,6 +39,7 @@ Renderer = function(canvas) {
       ctx.clearRect(0,0, canvas.width, canvas.height);
       particleSystem.eachEdge(this.drawEdge);
       particleSystem.eachNode(this.drawNode);
+      events.trigger('drawGitVisuals', particleSystem, ctx, canvas);
     },
     
     resize: function(){

src/mine.js

@@ -5,6 +5,7 @@ var events = _.clone(Backbone.Events);
 var sys = null;
 var graphicsEffects = {};
 var gitEngine = null;
+var gitVisuals = null;
 
 $(document).ready(function(){
   sys = arbor.ParticleSystem(4000, 500, 0.5, false, 55, 0.005, 'verlet');
@@ -18,6 +19,7 @@ $(document).ready(function(){
   });
 
   gitEngine = new GitEngine();
+  gitVisuals = new GitVisuals();
 
   var repulsionBreathe = function(r) {
     sys.parameters({repulsion: r});
@@ -40,9 +42,10 @@ Node.prototype.drawCircleNode = function(ctx, pt) {
   ctx.strokeStyle = graphics.nodeEdge;
   ctx.lineWidth = graphics.nodeStrokeWidth;
   ctx.fillStyle = graphics.nodeFill;
+  var radius = graphics.nodeRadius;
 
   ctx.beginPath();
-  ctx.arc(pt.x, pt.y, 10, 0, Math.PI*2, true);
+  ctx.arc(pt.x, pt.y, radius, 0, Math.PI*2, true);
   ctx.closePath();
   ctx.stroke();
   ctx.fill();

src/views.js

@@ -7,7 +7,7 @@ var CommandLineView = Backbone.View.extend({
       $.proxy(this.keyUp, this)
     );
 
-    events.on('commandConsumed', _.bind(
+    events.on('commandReadyForProcess', _.bind(
       this.parseOrCatch, this
     ));
   },
@@ -53,8 +53,8 @@ var CommandLineView = Backbone.View.extend({
   processError: function(err) {
     // in this demo, every command that's not a git command will
     // throw an exception. Some of these errors might be just to
-    // short-circuit the normal programatic flow, so we handle them
-    // here
+    // short-circuit the normal programatic flow and print stuff,
+    // so we handle them here
     if (err instanceof CommandProcessError) {
         events.trigger('commandProcessError', err);
     } else if (err instanceof CommandResult) {
@@ -81,13 +81,13 @@ var CommandLineView = Backbone.View.extend({
     }
     this.index = -1;
 
-    events.trigger('commandConsumed', value);
+    events.trigger('commandSubmitted', value);
+    events.trigger('commandReadyForProcess', value);
   },
 
   parseOrCatch: function(value) {
     try {
       var command = new Command(value);
-      console.log(command);
       events.trigger('gitCommandReady', command);
     } catch (err) {
       this.processError(err);
@@ -97,7 +97,7 @@ var CommandLineView = Backbone.View.extend({
 
 var CommandLineHistoryView = Backbone.View.extend({
   initialize: function(options) {
-    events.on('commandConsumed', _.bind(
+    events.on('commandSubmitted', _.bind(
       this.addCommand, this
     ));
 
@@ -165,7 +165,8 @@ var CommandLineHistoryView = Backbone.View.extend({
   },
 
   commandResultPrint: function(err) {
-    if (!err.msg.length) {
+    if (!err.get('msg') || !err.get('msg').length) {
+      console.log(err);
       // blank lines
       return;
     }

src/visuals.js

@@ -0,0 +1,57 @@
+function GitVisuals() {
+  this.collection = commitCollection;
+
+  this.collection.on('change', _.bind(this.collectionChanged, this));
+  events.on('drawGitVisuals', _.bind(this.drawVisuals, this));
+}
+
+GitVisuals.prototype.drawVisuals = function(sys, ctx, canvas) {
+  // we need to draw refs here
+  var branches = gitEngine.getBranches();
+  var detachedHead = gitEngine.getDetachedHead();
+  var HEAD = gitEngine.getHead();
+
+  _.forEach(branches, _.bind(function(branch) {
+    // get the location of the arbor node and then somehow draw the ref to the side?
+    var node = branch.target.get('arborNode');
+    var nodePoint = sys.toScreen(node._p);
+
+    // text position
+    // TODO: better positioning of text here
+    var screenPoint = _.clone(nodePoint);
+    screenPoint.x += 100;
+
+    ctx.font = graphics.refFont;
+    ctx.fillStyle = graphics.refFontFill;
+    ctx.fillText(branch.id, screenPoint.x, screenPoint.y);
+
+    // also draw an arrow
+    var offset = Math.round(graphics.nodeRadius * 2.5);
+    this.drawArrow(ctx, screenPoint, nodePoint, graphics.arrowHeadWidth, offset);
+  }, this));
+};
+
+GitVisuals.prototype.drawArrow = function(ctx, start, end, headWidth, offset) {
+  // TODO only horizontal arrows for now, fix this later
+  var end = _.clone(end);
+  end.x += offset;
+
+  ctx.lineWidth = graphics.arrowWidth;
+  ctx.fillStyle = graphics.arrowFill;
+  ctx.strokeStyle = graphics.arrowStroke;
+
+  ctx.beginPath();
+  ctx.moveTo(start.x, start.y);
+  ctx.lineTo(end.x, end.y);
+
+  // now do the little arrow head
+  ctx.lineTo(end.x + headWidth, end.y + headWidth);
+  ctx.lineTo(end.x + headWidth, end.y - headWidth);
+  ctx.lineTo(end.x, end.y);
+
+  ctx.stroke();
+};
+
+GitVisuals.prototype.collectionChanged = function() {
+  // redo the algorithms
+};