Add label templates [#22], also Bowie is the *goblin* king... oops!

README.md

@@ -17,16 +17,16 @@ other projects.
 ```
 title Labyrinth
 
-Bowie -> Gremlin: You remind me of the babe
-Gremlin -> Bowie: What babe?
-Bowie -> Gremlin: The babe with the power
-Gremlin -> Bowie: What power?
-note right of Bowie, Gremlin: Most people get muddled here!
-Bowie -> Gremlin: 'The power of voodoo'
-Gremlin -> Bowie: "Who-do?"
-Bowie -> Gremlin: You do!
-Gremlin -> Bowie: Do what?
-Bowie -> Gremlin: Remind me of the babe!
+Bowie -> Goblin: You remind me of the babe
+Goblin -> Bowie: What babe?
+Bowie -> Goblin: The babe with the power
+Goblin -> Bowie: What power?
+note right of Bowie, Goblin: Most people get muddled here!
+Bowie -> Goblin: 'The power of voodoo'
+Goblin -> Bowie: "Who-do?"
+Bowie -> Goblin: You do!
+Goblin -> Bowie: Do what?
+Bowie -> Goblin: Remind me of the babe!
 
 Bowie -> Audience: Sings
 
@@ -113,6 +113,19 @@ else
 end
 ```
 
+### Label Templates
+
+<img src="screenshots/LabelTemplates.png" alt="Label Templates preview" width="200" align="right" />
+
+```
+autolabel "[<inc>] <label>"
+
+begin "Underpants\nGnomes" as A
+A <- ]: Collect underpants
+A <-> ]: ???
+A <- ]: Profit!
+```
+
 ### Multiline Text
 
 <img src="screenshots/MultilineText.png" alt="Multiline Text preview" width="200" align="right" />

scripts/main.js

@@ -25,16 +25,16 @@
 		const defaultCode = (
 			'title Labyrinth\n' +
 			'\n' +
-			'Bowie -> Gremlin: You remind me of the babe\n' +
-			'Gremlin -> Bowie: What babe?\n' +
-			'Bowie -> Gremlin: The babe with the power\n' +
-			'Gremlin -> Bowie: What power?\n' +
-			'note right of Bowie, Gremlin: Most people get muddled here!\n' +
-			'Bowie -> Gremlin: \'The power of voodoo\'\n' +
-			'Gremlin -> Bowie: "Who-do?"\n' +
-			'Bowie -> Gremlin: You do!\n' +
-			'Gremlin -> Bowie: Do what?\n' +
-			'Bowie -> Gremlin: Remind me of the babe!\n' +
+			'Bowie -> Goblin: You remind me of the babe\n' +
+			'Goblin -> Bowie: What babe?\n' +
+			'Bowie -> Goblin: The babe with the power\n' +
+			'Goblin -> Bowie: What power?\n' +
+			'note right of Bowie, Goblin: Most people get muddled here!\n' +
+			'Bowie -> Goblin: \'The power of voodoo\'\n' +
+			'Goblin -> Bowie: "Who-do?"\n' +
+			'Bowie -> Goblin: You do!\n' +
+			'Goblin -> Bowie: Do what?\n' +
+			'Bowie -> Goblin: Remind me of the babe!\n' +
 			'\n' +
 			'Bowie -> Audience: Sings\n' +
 			'\n' +
@@ -86,6 +86,16 @@
 					'end B'
 				),
 			},
+			{
+				title: 'Numbered labels',
+				code: 'autolabel "[<inc>] <label>"',
+				preview: (
+					'autolabel "[<inc>] <label>"\n' +
+					'A -> B: Foo\n' +
+					'A <- B: Bar\n' +
+					'A -> B: Baz'
+				),
+			},
 			{
 				title: 'Conditional blocks',
 				code: (

scripts/sequence/CodeMirrorMode.js

@@ -207,6 +207,10 @@ define(['core/ArrayUtilities'], (array) => {
 				'left': makeSideNote('left'),
 				'right': makeSideNote('right'),
 			}},
+			'autolabel': {type: 'keyword', suggest: true, then: {
+				'off': {type: 'keyword', suggest: true, then: {}},
+				'': textToEnd,
+			}},
 			'simultaneously': {type: 'keyword', suggest: true, then: {
 				':': {type: 'operator', suggest: true, then: {}},
 				'with': {type: 'keyword', suggest: true, then: {

scripts/sequence/Generator.js

@@ -179,6 +179,7 @@ define(['core/ArrayUtilities'], (array) => {
 			this.agentStates = new Map();
 			this.agentAliases = new Map();
 			this.agents = [];
+			this.labelPattern = null;
 			this.blockCount = 0;
 			this.nesting = [];
 			this.markers = new Set();
@@ -191,6 +192,7 @@ define(['core/ArrayUtilities'], (array) => {
 				'agent define': this.handleAgentDefine.bind(this),
 				'agent begin': this.handleAgentBegin.bind(this),
 				'agent end': this.handleAgentEnd.bind(this),
+				'label pattern': this.handleLabelPattern.bind(this),
 				'connect': this.handleConnect.bind(this),
 				'note over': this.handleNote.bind(this),
 				'note left': this.handleNote.bind(this),
@@ -373,6 +375,36 @@ define(['core/ArrayUtilities'], (array) => {
 			this.addStage({type: 'async', target}, false);
 		}
 
+		handleLabelPattern({pattern}) {
+			this.labelPattern = pattern.slice();
+			for(let i = 0; i < this.labelPattern.length; ++ i) {
+				const part = this.labelPattern[i];
+				if(typeof part === 'object' && part.start !== undefined) {
+					this.labelPattern[i] = Object.assign({
+						current: part.start,
+					}, part);
+				}
+			}
+		}
+
+		applyLabelPattern(label) {
+			let result = '';
+			const tokens = {
+				'label': label,
+			};
+			this.labelPattern.forEach((part) => {
+				if(typeof part === 'string') {
+					result += part;
+				} else if(part.token !== undefined) {
+					result += tokens[part.token];
+				} else if(part.current !== undefined) {
+					result += part.current.toFixed(part.dp);
+					part.current += part.inc;
+				}
+			});
+			return result;
+		}
+
 		handleConnect({agents, label, options}) {
 			const beginAgents = (agents
 				.filter(agentHasFlag('begin'))
@@ -412,7 +444,7 @@ define(['core/ArrayUtilities'], (array) => {
 			const connectStage = {
 				type: 'connect',
 				agentNames,
-				label,
+				label: this.applyLabelPattern(label),
 				options,
 			};
 
@@ -528,6 +560,7 @@ define(['core/ArrayUtilities'], (array) => {
 			this.agents.length = 0;
 			this.blockCount = 0;
 			this.nesting.length = 0;
+			this.labelPattern = [{token: 'label'}];
 			const globals = this.beginNested('global', '', '', 0);
 
 			stages.forEach(this.handleStage);

scripts/sequence/Generator_spec.js

@@ -26,6 +26,10 @@ defineDescribe('Sequence Generator', ['./Generator'], (Generator) => {
 			return {type: 'block end'};
 		},
 
+		labelPattern: (pattern, {ln = 0} = {}) => {
+			return {type: 'label pattern', pattern, ln};
+		},
+
 		defineAgents: (agentNames, {ln = 0} = {}) => {
 			return {
 				type: 'agent define',
@@ -325,6 +329,56 @@ defineDescribe('Sequence Generator', ['./Generator'], (Generator) => {
 			]);
 		});
 
+		it('uses label patterns for connections', () => {
+			const sequence = generator.generate({stages: [
+				PARSED.labelPattern(['foo ', {token: 'label'}, ' bar']),
+				PARSED.connect(['A', 'B'], {label: 'myLabel'}),
+			]});
+			expect(sequence.stages).toEqual([
+				jasmine.anything(),
+				GENERATED.connect(['A', 'B'], {
+					label: 'foo myLabel bar',
+				}),
+				jasmine.anything(),
+			]);
+		});
+
+		it('applies counters in label patterns', () => {
+			const sequence = generator.generate({stages: [
+				PARSED.labelPattern([{start: 3, inc: 2, dp: 0}, ' suffix']),
+				PARSED.connect(['A', 'B'], {label: 'foo'}),
+				PARSED.connect(['A', 'B'], {label: 'bar'}),
+			]});
+			expect(sequence.stages).toEqual([
+				jasmine.anything(),
+				GENERATED.connect(['A', 'B'], {
+					label: '3 suffix',
+				}),
+				GENERATED.connect(['A', 'B'], {
+					label: '5 suffix',
+				}),
+				jasmine.anything(),
+			]);
+		});
+
+		it('applies counter rounding in label patterns', () => {
+			const sequence = generator.generate({stages: [
+				PARSED.labelPattern([{start: 0.52, inc: 1, dp: 1}, ' suffix']),
+				PARSED.connect(['A', 'B'], {label: 'foo'}),
+				PARSED.connect(['A', 'B'], {label: 'bar'}),
+			]});
+			expect(sequence.stages).toEqual([
+				jasmine.anything(),
+				GENERATED.connect(['A', 'B'], {
+					label: '0.5 suffix',
+				}),
+				GENERATED.connect(['A', 'B'], {
+					label: '1.5 suffix',
+				}),
+				jasmine.anything(),
+			]);
+		});
+
 		it('creates implicit end stages for all remaining agents', () => {
 			const sequence = generator.generate({
 				meta: {

scripts/sequence/LabelPatternParser.js

@@ -0,0 +1,75 @@
+define(() => {
+	'use strict';
+
+	const LABEL_PATTERN = /(.*?)<([^<>]*)>/g;
+	const DP_PATTERN = /\.([0-9]*)/;
+
+	function countDP(value) {
+		const match = DP_PATTERN.exec(value);
+		if(!match || !match[1]) {
+			return 0;
+		}
+		return match[1].length;
+	}
+
+	function parseCounter(args) {
+		let start = 1;
+		let inc = 1;
+		let dp = 0;
+		if(args[0]) {
+			start = Number(args[0]);
+			dp = Math.max(dp, countDP(args[0]));
+		}
+		if(args[1]) {
+			inc = Number(args[1]);
+			dp = Math.max(dp, countDP(args[1]));
+		}
+		return {start, inc, dp};
+	}
+
+	function parseToken(token) {
+		if(token === 'label') {
+			return {token: 'label'};
+		}
+
+		const p = token.indexOf(' ');
+		let type = null;
+		let args = null;
+		if(p === -1) {
+			type = token;
+			args = [];
+		} else {
+			type = token.substr(0, p);
+			args = token.substr(p + 1).split(',');
+		}
+
+		if(type === 'inc') {
+			return parseCounter(args);
+		}
+
+		return '<' + token + '>';
+	}
+
+	function parsePattern(raw) {
+		const pattern = [];
+		let match = null;
+		let end = 0;
+		LABEL_PATTERN.lastIndex = 0;
+		while((match = LABEL_PATTERN.exec(raw))) {
+			if(match[1]) {
+				pattern.push(match[1]);
+			}
+			if(match[2]) {
+				pattern.push(parseToken(match[2]));
+			}
+			end = LABEL_PATTERN.lastIndex;
+		}
+		const remainder = raw.substr(end);
+		if(remainder) {
+			pattern.push(remainder);
+		}
+		return pattern;
+	}
+
+	return parsePattern;
+});

scripts/sequence/LabelPatternParser_spec.js

@@ -0,0 +1,83 @@
+defineDescribe('Label Pattern Parser', ['./LabelPatternParser'], (parser) => {
+	'use strict';
+
+	it('converts simple text', () => {
+		const parsed = parser('hello everybody');
+		expect(parsed).toEqual([
+			'hello everybody',
+		]);
+	});
+
+	it('handles the empty case', () => {
+		const parsed = parser('');
+		expect(parsed).toEqual([]);
+	});
+
+	it('converts tokens', () => {
+		const parsed = parser('foo <label> bar');
+		expect(parsed).toEqual([
+			'foo ',
+			{token: 'label'},
+			' bar',
+		]);
+	});
+
+	it('converts multiple tokens', () => {
+		const parsed = parser('foo <label> bar <label> baz');
+		expect(parsed).toEqual([
+			'foo ',
+			{token: 'label'},
+			' bar ',
+			{token: 'label'},
+			' baz',
+		]);
+	});
+
+	it('ignores empty sequences', () => {
+		const parsed = parser('<label><label>');
+		expect(parsed).toEqual([
+			{token: 'label'},
+			{token: 'label'},
+		]);
+	});
+
+	it('passes unrecognised tokens through unchanged', () => {
+		const parsed = parser('foo <nope>');
+		expect(parsed).toEqual([
+			'foo ',
+			'<nope>',
+		]);
+	});
+
+	it('converts counters', () => {
+		const parsed = parser('<inc 5, 2>a<inc 2, 1>b');
+		expect(parsed).toEqual([
+			{start: 5, inc: 2, dp: 0},
+			'a',
+			{start: 2, inc: 1, dp: 0},
+			'b',
+		]);
+	});
+
+	it('defaults counters to increment = 1', () => {
+		const parsed = parser('<inc 5>');
+		expect(parsed).toEqual([
+			{start: 5, inc: 1, dp: 0},
+		]);
+	});
+
+	it('defaults counters to start = 1', () => {
+		const parsed = parser('<inc>');
+		expect(parsed).toEqual([
+			{start: 1, inc: 1, dp: 0},
+		]);
+	});
+
+	it('assigns decimal places to counters by their written precision', () => {
+		const parsed = parser('<inc 5.0, 2.00><inc 2.00, 1.0>');
+		expect(parsed).toEqual([
+			{start: jasmine.anything(), inc: jasmine.anything(), dp: 2},
+			{start: jasmine.anything(), inc: jasmine.anything(), dp: 2},
+		]);
+	});
+});

scripts/sequence/Parser.js

@@ -1,10 +1,12 @@
 define([
 	'core/ArrayUtilities',
 	'./Tokeniser',
+	'./LabelPatternParser',
 	'./CodeMirrorHints',
 ], (
 	array,
 	Tokeniser,
+	labelPatternParser,
 	CMHints
 ) => {
 	'use strict';
@@ -247,6 +249,23 @@ define([
 			return true;
 		},
 
+		(line) => { // autolabel
+			if(tokenKeyword(line[0]) !== 'autolabel') {
+				return null;
+			}
+
+			let raw = null;
+			if(tokenKeyword(line[1]) === 'off') {
+				raw = '<label>';
+			} else {
+				raw = joinLabel(line, 1);
+			}
+			return {
+				type: 'label pattern',
+				pattern: labelPatternParser(raw),
+			};
+		},
+
 		(line) => { // block
 			if(tokenKeyword(line[0]) === 'end' && line.length === 1) {
 				return {type: 'block end'};

scripts/sequence/Parser_spec.js

@@ -412,6 +412,32 @@ defineDescribe('Sequence Parser', ['./Parser'], (Parser) => {
 			}]);
 		});
 
+		it('converts autolabel commands', () => {
+			const parsed = parser.parse('autolabel "foo <label> bar"');
+			expect(parsed.stages).toEqual([
+				{
+					type: 'label pattern',
+					ln: jasmine.anything(),
+					pattern: [
+						'foo ',
+						{token: 'label'},
+						' bar',
+					],
+				},
+			]);
+		});
+
+		it('converts autolabel off commands', () => {
+			const parsed = parser.parse('autolabel off');
+			expect(parsed.stages).toEqual([
+				{
+					type: 'label pattern',
+					ln: jasmine.anything(),
+					pattern: [{token: 'label'}],
+				},
+			]);
+		});
+
 		it('converts "simultaneously" flow commands', () => {
 			const parsed = parser.parse('simultaneously:');
 			expect(parsed.stages).toEqual([{

scripts/specs.js

@@ -7,6 +7,7 @@ define([
 	'interface/Interface_spec',
 	'sequence/Tokeniser_spec',
 	'sequence/Parser_spec',
+	'sequence/LabelPatternParser_spec',
 	'sequence/Generator_spec',
 	'sequence/Renderer_spec',
 	'sequence/themes/Basic_spec',