marcel/mermaid
1
0
Fork 0
mirror of https://github.com/mermaid-js/mermaid.git synced 2025-10-21 06:59:36 +02:00
Code Issues Packages Projects Releases Wiki Activity

feat: enhance use case diagram support with arrow types, class definitions and styles

Browse Source
This commit is contained in:
omkarht
2025-10-13 18:46:47 +05:30
parent b7ff1920a9
commit 5b2b3b8ae9
6 changed files with 527 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

106
packages/parser/src/language/usecase/Usecase.g4
View File

@@ -11,9 +11,17 @@ statement
| systemBoundaryStatement
| systemBoundaryTypeStatement
| directionStatement
| classDefStatement
| classStatement
| styleStatement
| usecaseStatement
| NEWLINE
;
usecaseStatement
: entityName NEWLINE*
;
actorStatement
: 'actor' actorList NEWLINE*
;
@@ -60,10 +68,16 @@ systemBoundaryContent
;
usecaseInBoundary
: IDENTIFIER
: usecaseWithClass
| IDENTIFIER
| STRING
;
usecaseWithClass
: IDENTIFIER CLASS_SEPARATOR IDENTIFIER
| STRING CLASS_SEPARATOR IDENTIFIER
;
systemBoundaryTypeStatement
: systemBoundaryName '@' '{' systemBoundaryTypeContent '}' NEWLINE*
;
@@ -82,7 +96,9 @@ systemBoundaryType
;
entityName
: IDENTIFIER
: IDENTIFIER CLASS_SEPARATOR IDENTIFIER
| STRING CLASS_SEPARATOR IDENTIFIER
| IDENTIFIER
| STRING
| nodeIdWithLabel
;
@@ -106,6 +122,10 @@ arrow
: SOLID_ARROW
| BACK_ARROW
| LINE_SOLID
| CIRCLE_ARROW
| CROSS_ARROW
| CIRCLE_ARROW_REVERSED
| CROSS_ARROW_REVERSED
| labeledArrow
;
@@ -113,6 +133,10 @@ labeledArrow
: LINE_SOLID edgeLabel SOLID_ARROW
| BACK_ARROW edgeLabel LINE_SOLID
| LINE_SOLID edgeLabel LINE_SOLID
| LINE_SOLID edgeLabel CIRCLE_ARROW
| LINE_SOLID edgeLabel CROSS_ARROW
| CIRCLE_ARROW_REVERSED edgeLabel LINE_SOLID
| CROSS_ARROW_REVERSED edgeLabel LINE_SOLID
;
edgeLabel
@@ -132,6 +156,43 @@ direction
| 'LR'
;
classDefStatement
: 'classDef' IDENTIFIER stylesOpt NEWLINE*
;
stylesOpt
: style
| stylesOpt COMMA style
;
style
: styleComponent
| style styleComponent
;
styleComponent
: IDENTIFIER
| NUMBER
| HASH_COLOR
| COLON
| STRING
| DASH
| DOT
| PERCENT
;
classStatement
: 'class' nodeList IDENTIFIER NEWLINE*
;
styleStatement
: 'style' IDENTIFIER stylesOpt NEWLINE*
;
nodeList
: IDENTIFIER (',' IDENTIFIER)*
;
// Lexer rules
SOLID_ARROW
: '-->'
@@ -141,6 +202,21 @@ BACK_ARROW
: '<--'
;
CIRCLE_ARROW
: '--o'
;
CIRCLE_ARROW_REVERSED
: 'o--'
;
CROSS_ARROW
: '--x'
;
CROSS_ARROW_REVERSED
: 'x--'
;
LINE_SOLID
: '--'
;
@@ -165,6 +241,10 @@ COLON
: ':'
;
CLASS_SEPARATOR
: ':::'
;
IDENTIFIER
: [a-zA-Z_][a-zA-Z0-9_]*
;
@@ -174,6 +254,28 @@ STRING
| '\'' (~['\r\n])* '\''
;
HASH_COLOR
: '#' [a-fA-F0-9]+
;
NUMBER
: [0-9]+ ('.' [0-9]+)? ([a-zA-Z]+)?
;
// These tokens are defined last so they have lowest priority
// This ensures arrow tokens like '-->' are matched before DASH
DASH
: '-'
;
DOT
: '.'
;
PERCENT
: '%'
;
NEWLINE
: [\r\n]+
;

271
packages/parser/src/language/usecase/visitor.ts
View File

@@ -19,6 +19,8 @@ import type {
SystemBoundaryTypePropertyContext,
SystemBoundaryTypeContext,
UsecaseInBoundaryContext,
UsecaseWithClassContext,
UsecaseStatementContext,
ActorNameContext,
ActorDeclarationContext,
NodeIdWithLabelContext,
@@ -32,6 +34,9 @@ import type {
EdgeLabelContext,
DirectionStatementContext,
DirectionContext,
ClassDefStatementContext,
ClassStatementContext,
NodeListContext,
} from './generated/UsecaseParser.js';
import { ARROW_TYPE } from './types.js';
import type {
@@ -41,6 +46,7 @@ import type {
Relationship,
UsecaseParseResult,
ArrowType,
ClassDef,
} from './types.js';
export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
@@ -50,6 +56,7 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
private relationships: Relationship[] = [];
private relationshipCounter = 0;
private direction = 'TB'; // Default direction
private classDefs = new Map<string, ClassDef>();
constructor() {
super();
@@ -62,6 +69,10 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
this.visitSystemBoundaryStatement = this.visitSystemBoundaryStatementImpl.bind(this);
this.visitSystemBoundaryTypeStatement = this.visitSystemBoundaryTypeStatementImpl.bind(this);
this.visitDirectionStatement = this.visitDirectionStatementImpl.bind(this);
this.visitClassDefStatement = this.visitClassDefStatementImpl.bind(this);
this.visitClassStatement = this.visitClassStatementImpl.bind(this);
this.visitStyleStatement = this.visitStyleStatementImpl.bind(this);
this.visitUsecaseStatement = this.visitUsecaseStatementImpl.bind(this);
this.visitActorName = this.visitActorNameImpl.bind(this);
this.visitArrow = this.visitArrowImpl.bind(this);
}
@@ -95,7 +106,7 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
/**
* Visit statement rule
* Grammar: statement : actorStatement | relationshipStatement | systemBoundaryStatement | systemBoundaryTypeStatement | directionStatement | NEWLINE ;
* Grammar: statement : actorStatement | relationshipStatement | systemBoundaryStatement | systemBoundaryTypeStatement | directionStatement | classDefStatement | classStatement | usecaseStatement | NEWLINE ;
*/
private visitStatementImpl(ctx: StatementContext): void {
if (ctx.actorStatement?.()) {
@@ -108,6 +119,23 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
this.visitSystemBoundaryTypeStatementImpl(ctx.systemBoundaryTypeStatement()!);
} else if (ctx.directionStatement?.()) {
this.visitDirectionStatementImpl(ctx.directionStatement()!);
} else if (ctx.classDefStatement?.()) {
const classDefStmt = ctx.classDefStatement();
if (classDefStmt) {
this.visitClassDefStatementImpl(classDefStmt);
}
} else if (ctx.classStatement?.()) {
const classStmt = ctx.classStatement();
if (classStmt) {
this.visitClassStatementImpl(classStmt);
}
} else if (ctx.styleStatement?.()) {
this.visitStyleStatementImpl(ctx.styleStatement());
} else if (ctx.usecaseStatement?.()) {
const usecaseStmt = ctx.usecaseStatement();
if (usecaseStmt) {
this.visitUsecaseStatementImpl(usecaseStmt);
}
}
// NEWLINE is ignored
}
@@ -269,9 +297,15 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
/**
* Visit usecaseInBoundary rule
* Grammar: usecaseInBoundary : IDENTIFIER | STRING ;
* Grammar: usecaseInBoundary : usecaseWithClass | IDENTIFIER | STRING ;
*/
private visitUsecaseInBoundaryImpl(ctx: UsecaseInBoundaryContext): string {
// Check for usecaseWithClass (e.g., "debugging:::case1")
const usecaseWithClass = ctx.usecaseWithClass?.();
if (usecaseWithClass) {
return this.visitUsecaseWithClassImpl(usecaseWithClass);
}
const identifier = ctx.IDENTIFIER?.();
if (identifier) {
return identifier.getText();
@@ -287,6 +321,37 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
return '';
}
/**
* Visit usecaseWithClass rule
* Grammar: usecaseWithClass : IDENTIFIER CLASS_SEPARATOR IDENTIFIER | STRING CLASS_SEPARATOR IDENTIFIER ;
*/
private visitUsecaseWithClassImpl(ctx: UsecaseWithClassContext): string {
let usecaseName = '';
let className = '';
const identifier0 = ctx.IDENTIFIER(0);
const identifier1 = ctx.IDENTIFIER(1);
const string = ctx.STRING();
if (identifier0 && identifier1) {
// IDENTIFIER:::IDENTIFIER
usecaseName = identifier0.getText();
className = identifier1.getText();
} else if (string && identifier0) {
// STRING:::IDENTIFIER
const text = string.getText();
usecaseName = text.slice(1, -1); // Remove quotes
className = identifier0.getText();
}
// Apply class to the use case
if (usecaseName && className) {
this.applyClassToEntity(usecaseName, className);
}
return usecaseName;
}
/**
* Visit systemBoundaryTypeStatement rule
* Grammar: systemBoundaryTypeStatement : systemBoundaryName '\@' '\{' systemBoundaryTypeContent '\}' NEWLINE* ;
@@ -432,15 +497,46 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
/**
* Visit entityName rule
* Grammar: entityName : IDENTIFIER | STRING | nodeIdWithLabel ;
* Grammar: entityName : IDENTIFIER CLASS_SEPARATOR IDENTIFIER | STRING CLASS_SEPARATOR IDENTIFIER | IDENTIFIER | STRING | nodeIdWithLabel ;
*/
private visitEntityNameImpl(ctx: EntityNameContext): string {
const identifier = ctx.IDENTIFIER?.();
const classSeparator = ctx.CLASS_SEPARATOR?.();
// Check for class application syntax (e.g., "debugging:::case1")
if (classSeparator) {
let entityName = '';
let className = '';
const identifier0 = ctx.IDENTIFIER(0);
const identifier1 = ctx.IDENTIFIER(1);
const string0 = ctx.STRING();
if (identifier0 && identifier1) {
// IDENTIFIER:::IDENTIFIER
entityName = identifier0.getText();
className = identifier1.getText();
} else if (string0 && identifier0) {
// STRING:::IDENTIFIER
const text = string0.getText();
entityName = text.slice(1, -1); // Remove quotes
className = identifier0.getText();
}
// Apply class to the entity
if (entityName && className) {
this.applyClassToEntity(entityName, className);
}
return entityName;
}
// Regular entity name without class
const identifier = ctx.IDENTIFIER(0);
if (identifier) {
return identifier.getText();
}
const string = ctx.STRING?.();
const string = ctx.STRING();
if (string) {
const text = string.getText();
// Remove quotes from string
@@ -455,6 +551,30 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
return '';
}
/**
* Apply a class to an entity (use case)
*/
private applyClassToEntity(entityName: string, className: string): void {
// Find or create the use case
let useCase = this.useCases.find((uc) => uc.id === entityName);
if (!useCase) {
useCase = {
id: entityName,
name: entityName,
classes: [],
};
this.useCases.push(useCase);
}
// Add the class if not already present
if (!useCase.classes) {
useCase.classes = [];
}
if (!useCase.classes.includes(className)) {
useCase.classes.push(className);
}
}
/**
* Visit actorDeclaration rule
* Grammar: actorDeclaration : 'actor' actorName ;
@@ -544,7 +664,7 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
/**
* Visit arrow rule
* Grammar: arrow : SOLID_ARROW | BACK_ARROW | LINE_SOLID | labeledArrow ;
* Grammar: arrow : SOLID_ARROW | BACK_ARROW | LINE_SOLID | CIRCLE_ARROW | CROSS_ARROW | CIRCLE_ARROW_REVERSED | CROSS_ARROW_REVERSED | labeledArrow ;
*/
private visitArrowImpl(ctx: ArrowContext): { arrowType: ArrowType; label?: string } {
// Check if this is a labeled arrow
@@ -559,6 +679,14 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
return { arrowType: ARROW_TYPE.BACK_ARROW };
} else if (ctx.LINE_SOLID()) {
return { arrowType: ARROW_TYPE.LINE_SOLID };
} else if (ctx.CIRCLE_ARROW()) {
return { arrowType: ARROW_TYPE.CIRCLE_ARROW };
} else if (ctx.CROSS_ARROW()) {
return { arrowType: ARROW_TYPE.CROSS_ARROW };
} else if (ctx.CIRCLE_ARROW_REVERSED()) {
return { arrowType: ARROW_TYPE.CIRCLE_ARROW_REVERSED };
} else if (ctx.CROSS_ARROW_REVERSED()) {
return { arrowType: ARROW_TYPE.CROSS_ARROW_REVERSED };
}
// Fallback (should not happen with proper grammar)
@@ -567,7 +695,7 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
/**
* Visit labeled arrow rule
* Grammar: labeledArrow : LINE_SOLID edgeLabel SOLID_ARROW | BACK_ARROW edgeLabel LINE_SOLID | LINE_SOLID edgeLabel LINE_SOLID ;
* Grammar: labeledArrow : LINE_SOLID edgeLabel SOLID_ARROW | BACK_ARROW edgeLabel LINE_SOLID | LINE_SOLID edgeLabel LINE_SOLID | LINE_SOLID edgeLabel CIRCLE_ARROW | LINE_SOLID edgeLabel CROSS_ARROW | CIRCLE_ARROW_REVERSED edgeLabel LINE_SOLID | CROSS_ARROW_REVERSED edgeLabel LINE_SOLID ;
*/
private visitLabeledArrowImpl(ctx: LabeledArrowContext): { arrowType: ArrowType; label: string } {
const label = this.visitEdgeLabelImpl(ctx.edgeLabel());
@@ -577,6 +705,14 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
return { arrowType: ARROW_TYPE.SOLID_ARROW, label };
} else if (ctx.BACK_ARROW()) {
return { arrowType: ARROW_TYPE.BACK_ARROW, label };
} else if (ctx.CIRCLE_ARROW()) {
return { arrowType: ARROW_TYPE.CIRCLE_ARROW, label };
} else if (ctx.CROSS_ARROW()) {
return { arrowType: ARROW_TYPE.CROSS_ARROW, label };
} else if (ctx.CIRCLE_ARROW_REVERSED()) {
return { arrowType: ARROW_TYPE.CIRCLE_ARROW_REVERSED, label };
} else if (ctx.CROSS_ARROW_REVERSED()) {
return { arrowType: ARROW_TYPE.CROSS_ARROW_REVERSED, label };
} else {
return { arrowType: ARROW_TYPE.LINE_SOLID, label };
}
@@ -622,6 +758,126 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
return text;
}
/**
* Visit classDefStatement rule
* Grammar: classDefStatement : 'classDef' IDENTIFIER stylesOpt NEWLINE* ;
*/
visitClassDefStatementImpl(ctx: ClassDefStatementContext): void {
const className = ctx.IDENTIFIER().getText();
const stylesOptCtx = ctx.stylesOpt();
// Get all style properties as an array of strings
const styles = this.visitStylesOptImpl(stylesOptCtx);
this.classDefs.set(className, {
id: className,
styles,
});
}
/**
* Visit stylesOpt rule
* Grammar: stylesOpt : style | stylesOpt COMMA style ;
* Returns an array of style strings like ['stroke:#f00', 'fill:#ff0']
*/
private visitStylesOptImpl(ctx: any): string[] {
const styles: string[] = [];
// Check if this is a recursive stylesOpt (stylesOpt COMMA style)
const stylesOptCtx = ctx.stylesOpt?.();
if (stylesOptCtx) {
styles.push(...this.visitStylesOptImpl(stylesOptCtx));
}
// Get the style context
const styleCtx = ctx.style();
if (styleCtx) {
const styleText = this.visitStyleImpl(styleCtx);
styles.push(styleText);
}
return styles;
}
/**
* Visit style rule
* Grammar: style : styleComponent | style styleComponent ;
* Returns a single style string like 'stroke:#f00'
*/
private visitStyleImpl(ctx: any): string {
// Get all text from the style context
return ctx.getText();
}
/**
* Visit classStatement rule
* Grammar: classStatement : 'class' nodeList IDENTIFIER NEWLINE* ;
*/
visitClassStatementImpl(ctx: ClassStatementContext): void {
const nodeIds = this.visitNodeListImpl(ctx.nodeList());
const className = ctx.IDENTIFIER().getText();
// Apply class to each node
nodeIds.forEach((nodeId) => {
this.applyClassToEntity(nodeId, className);
});
}
/**
* Visit styleStatement rule
* Grammar: styleStatement : 'style' IDENTIFIER stylesOpt NEWLINE* ;
*/
visitStyleStatementImpl(ctx: any): void {
const nodeId = ctx.IDENTIFIER().getText();
const stylesOptCtx = ctx.stylesOpt();
// Get all style properties as an array of strings
const styles = this.visitStylesOptImpl(stylesOptCtx);
// Apply styles directly to the entity
let entity = this.useCases.find((uc) => uc.id === nodeId);
if (!entity) {
entity = this.actors.find((a) => a.id === nodeId);
}
if (!entity) {
entity = this.systemBoundaries.find((sb) => sb.id === nodeId);
}
if (entity) {
// Initialize styles array if it doesn't exist
if (!entity.styles) {
entity.styles = [];
}
// Add the new styles
entity.styles.push(...styles);
}
}
/**
* Visit nodeList rule
* Grammar: nodeList : IDENTIFIER (',' IDENTIFIER)* ;
*/
private visitNodeListImpl(ctx: NodeListContext): string[] {
const identifiers = ctx.IDENTIFIER();
return identifiers.map((id) => id.getText());
}
/**
* Visit usecaseStatement rule
* Grammar: usecaseStatement : entityName NEWLINE* ;
*/
visitUsecaseStatementImpl(ctx: UsecaseStatementContext): void {
const entityName = this.visitEntityNameImpl(ctx.entityName());
// Create a standalone use case if it doesn't already exist
if (!this.useCases.some((uc) => uc.id === entityName)) {
this.useCases.push({
id: entityName,
name: entityName,
});
}
}
/**
* Get the parse result after visiting the diagram
*/
@@ -631,6 +887,7 @@ export class UsecaseAntlrVisitor extends UsecaseVisitor<void> {
useCases: this.useCases,
systemBoundaries: this.systemBoundaries,
relationships: this.relationships,
classDefs: this.classDefs,
direction: this.direction,
};
}