AtomicGameEngine/Build/node_modules/tslint/lib/rules/noUnusedVariableRule.js

"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var ts = require("typescript");
var Lint = require("../lint");
var OPTION_REACT = "react";
var OPTION_CHECK_PARAMETERS = "check-parameters";
var REACT_MODULES = ["react", "react/addons"];
var REACT_NAMESPACE_IMPORT_NAME = "React";
var MODULE_SPECIFIER_MATCH = /^["'](.+)['"]$/;
var Rule = (function (_super) {
    __extends(Rule, _super);
    function Rule() {
        _super.apply(this, arguments);
    }
    Rule.prototype.apply = function (sourceFile) {
        var languageService = Lint.createLanguageService(sourceFile.fileName, sourceFile.getFullText());
        return this.applyWithWalker(new NoUnusedVariablesWalker(sourceFile, this.getOptions(), languageService));
    };
    Rule.FAILURE_STRING = "unused variable: ";
    return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
var NoUnusedVariablesWalker = (function (_super) {
    __extends(NoUnusedVariablesWalker, _super);
    function NoUnusedVariablesWalker(sourceFile, options, languageService) {
        _super.call(this, sourceFile, options);
        this.languageService = languageService;
        this.skipVariableDeclaration = false;
        this.skipParameterDeclaration = false;
        this.hasSeenJsxElement = false;
        this.isReactUsed = false;
    }
    NoUnusedVariablesWalker.prototype.visitSourceFile = function (node) {
        _super.prototype.visitSourceFile.call(this, node);
        if (this.hasOption(OPTION_REACT)
            && this.reactImport != null
            && !this.isReactUsed
            && !this.hasSeenJsxElement) {
            var nameText = this.reactImport.name.getText();
            this.addFailure(this.createFailure(this.reactImport.name.getStart(), nameText.length, Rule.FAILURE_STRING + "'" + nameText + "'"));
        }
    };
    NoUnusedVariablesWalker.prototype.visitBindingElement = function (node) {
        var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
        if (isSingleVariable && !this.skipBindingElement) {
            var variableIdentifier = node.name;
            this.validateReferencesForVariable(variableIdentifier.text, variableIdentifier.getStart());
        }
        _super.prototype.visitBindingElement.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitCatchClause = function (node) {
        this.visitBlock(node.block);
    };
    NoUnusedVariablesWalker.prototype.visitFunctionDeclaration = function (node) {
        if (!Lint.hasModifier(node.modifiers, ts.SyntaxKind.ExportKeyword, ts.SyntaxKind.DeclareKeyword)) {
            var variableName = node.name.text;
            this.validateReferencesForVariable(variableName, node.name.getStart());
        }
        _super.prototype.visitFunctionDeclaration.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitFunctionType = function (node) {
        this.skipParameterDeclaration = true;
        _super.prototype.visitFunctionType.call(this, node);
        this.skipParameterDeclaration = false;
    };
    NoUnusedVariablesWalker.prototype.visitImportDeclaration = function (node) {
        if (!Lint.hasModifier(node.modifiers, ts.SyntaxKind.ExportKeyword)) {
            var importClause = node.importClause;
            if (importClause != null && importClause.name != null) {
                var variableIdentifier = importClause.name;
                this.validateReferencesForVariable(variableIdentifier.text, variableIdentifier.getStart());
            }
        }
        _super.prototype.visitImportDeclaration.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitImportEqualsDeclaration = function (node) {
        if (!Lint.hasModifier(node.modifiers, ts.SyntaxKind.ExportKeyword)) {
            var name_1 = node.name;
            this.validateReferencesForVariable(name_1.text, name_1.getStart());
        }
        _super.prototype.visitImportEqualsDeclaration.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitIndexSignatureDeclaration = function (node) {
        this.skipParameterDeclaration = true;
        _super.prototype.visitIndexSignatureDeclaration.call(this, node);
        this.skipParameterDeclaration = false;
    };
    NoUnusedVariablesWalker.prototype.visitInterfaceDeclaration = function (node) {
        this.skipParameterDeclaration = true;
        _super.prototype.visitInterfaceDeclaration.call(this, node);
        this.skipParameterDeclaration = false;
    };
    NoUnusedVariablesWalker.prototype.visitJsxElement = function (node) {
        this.hasSeenJsxElement = true;
        _super.prototype.visitJsxElement.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitJsxSelfClosingElement = function (node) {
        this.hasSeenJsxElement = true;
        _super.prototype.visitJsxSelfClosingElement.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitMethodDeclaration = function (node) {
        if (node.name != null && node.name.kind === ts.SyntaxKind.Identifier) {
            var modifiers = node.modifiers;
            var variableName = node.name.text;
            if (Lint.hasModifier(modifiers, ts.SyntaxKind.PrivateKeyword)) {
                this.validateReferencesForVariable(variableName, node.name.getStart());
            }
        }
        if (Lint.hasModifier(node.modifiers, ts.SyntaxKind.AbstractKeyword)) {
            this.skipParameterDeclaration = true;
        }
        _super.prototype.visitMethodDeclaration.call(this, node);
        this.skipParameterDeclaration = false;
    };
    NoUnusedVariablesWalker.prototype.visitNamedImports = function (node) {
        for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
            var namedImport = _a[_i];
            this.validateReferencesForVariable(namedImport.name.text, namedImport.name.getStart());
        }
        _super.prototype.visitNamedImports.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitNamespaceImport = function (node) {
        var importDeclaration = node.parent.parent;
        var moduleSpecifier = importDeclaration.moduleSpecifier.getText();
        var moduleNameMatch = moduleSpecifier.match(MODULE_SPECIFIER_MATCH);
        var isReactImport = (moduleNameMatch != null) && (REACT_MODULES.indexOf(moduleNameMatch[1]) !== -1);
        if (this.hasOption(OPTION_REACT) && isReactImport && node.name.text === REACT_NAMESPACE_IMPORT_NAME) {
            this.reactImport = node;
            var fileName = this.getSourceFile().fileName;
            var position = node.name.getStart();
            var highlights = this.languageService.getDocumentHighlights(fileName, position, [fileName]);
            if (highlights != null && highlights[0].highlightSpans.length > 1) {
                this.isReactUsed = true;
            }
        }
        else {
            this.validateReferencesForVariable(node.name.text, node.name.getStart());
        }
        _super.prototype.visitNamespaceImport.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitParameterDeclaration = function (node) {
        var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
        var isPropertyParameter = Lint.hasModifier(node.modifiers, ts.SyntaxKind.PublicKeyword, ts.SyntaxKind.PrivateKeyword, ts.SyntaxKind.ProtectedKeyword);
        if (!isSingleVariable && isPropertyParameter) {
            this.skipBindingElement = true;
        }
        if (this.hasOption(OPTION_CHECK_PARAMETERS)
            && isSingleVariable
            && !this.skipParameterDeclaration
            && !Lint.hasModifier(node.modifiers, ts.SyntaxKind.PublicKeyword)) {
            var nameNode = node.name;
            this.validateReferencesForVariable(nameNode.text, node.name.getStart());
        }
        _super.prototype.visitParameterDeclaration.call(this, node);
        this.skipBindingElement = false;
    };
    NoUnusedVariablesWalker.prototype.visitPropertyDeclaration = function (node) {
        if (node.name != null && node.name.kind === ts.SyntaxKind.Identifier) {
            var modifiers = node.modifiers;
            var variableName = node.name.text;
            if (Lint.hasModifier(modifiers, ts.SyntaxKind.PrivateKeyword)) {
                this.validateReferencesForVariable(variableName, node.name.getStart());
            }
        }
        _super.prototype.visitPropertyDeclaration.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitVariableDeclaration = function (node) {
        var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
        if (isSingleVariable && !this.skipVariableDeclaration) {
            var variableIdentifier = node.name;
            this.validateReferencesForVariable(variableIdentifier.text, variableIdentifier.getStart());
        }
        _super.prototype.visitVariableDeclaration.call(this, node);
    };
    NoUnusedVariablesWalker.prototype.visitVariableStatement = function (node) {
        if (Lint.hasModifier(node.modifiers, ts.SyntaxKind.ExportKeyword, ts.SyntaxKind.DeclareKeyword)) {
            this.skipBindingElement = true;
            this.skipVariableDeclaration = true;
        }
        _super.prototype.visitVariableStatement.call(this, node);
        this.skipBindingElement = false;
        this.skipVariableDeclaration = false;
    };
    NoUnusedVariablesWalker.prototype.validateReferencesForVariable = function (name, position) {
        var fileName = this.getSourceFile().fileName;
        var highlights = this.languageService.getDocumentHighlights(fileName, position, [fileName]);
        if (highlights == null || highlights[0].highlightSpans.length <= 1) {
            this.addFailure(this.createFailure(position, name.length, Rule.FAILURE_STRING + "'" + name + "'"));
        }
    };
    return NoUnusedVariablesWalker;
}(Lint.RuleWalker));