Javascript
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935行
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33.19 KB
/*
* Author: Heidi Pan <heidi.pan@intel.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
// dependencies
var peg = require('pegjs')
, fs = require('fs')
, path = require('path')
, Promise = require('bluebird')
, _ = require('lodash')
, util = require('util');
// use promise-style programming rather than spaghetti callbacks
Promise.promisifyAll(fs);
var xml2js = {
// js-format specs
// MODULE: <module name>
// ENUMS: {
// <enum name>: {
// type: <enum type>,
// description: <enum description>
// }, ...
// }
// ENUMS_BY_GROUP: {
// <enum type>: {
// description: <enum group description>
// members: [ <enum name>, ... ]
// }, ...
// }
// METHODS: {
// <method name>: {
// description: <method description>,
// params: {
// <param name>: {
// type: <param type>,
// description: <param description >
// }, ...
// },
// return: {
// type: <return type>,
// description: <return description>
// }
// }, ...
// }
// CLASSES: {
// <class name>: {
// description: <class description>,
// parent: <parent class name>,
// group: <group name>,
// methods: { ... },
// variables: {
// <variable name>: {
// type: <variable type>,
// description: <variable description>
// }
// },
// enums: { ... },
// enums_by_group: { ... }
// }, ...
// }
// CLASSGROUPS: {
// <group name>: {
// description: <group description>,
// classes: [ <class name>, ... ],
// enums: { ... },
// enums_by_group: { ... }
// }, ...
// }
MODULE: '',
ENUMS: {},
ENUMS_BY_GROUP: {},
METHODS: {},
CLASSES: {},
CLASSGROUPS: {},
// baseline c -> js type mapping
TYPEMAPS: {
'^(const)?\\s*(unsigned|signed)?\\s*(int|short|long|float|double|size_t|u?int\\d{1,2}_t)?$': 'Number',
'^bool$': 'Boolean',
'^(const)?\\s*(unsigned|signed)?\\s*(char|char\\s*\\*|std::string)$': 'String', // TODO: verify that swig does this mapping
'^void\\s*\\(\\s*\\*\\s*\\)\\s*\\(\\s*void\\s*\\*\\)\\s*$': 'Function'
},
// custom c -> js type mapping for pointers
// ARRAY_TYPEMAPS: {
// <pointer data type>: {
// arrayType: <swig generated array type that will replace pointers of data type>,
// classes: [ <class that contains arrayType>, ... ]
// }, ...
// }
// POINTER_TYPEMAPS: {
// <class that contains pointerType>: {
// <c pointer data type>: <js swig generated pointer type that will replace pointers of data type>, ...
// }, ...
// }
ARRAY_TYPEMAPS: {},
POINTER_TYPEMAPS: {},
// add command line options for this module
addOptions: function(opts) {
xml2js.opts = opts;
return opts
.option('-i, --inputdir [directory]', 'directory for xml files', __dirname + '/xml/mraa')
.option('-c, --custom [file]', 'json for customizations')
.option('-t, --typemaps [directory]', 'directory for custom pointer type maps')
.option('-g, --imagedir [directory]', 'directory to link to where the images will be kept', '')
.option('-s, --strict', 'leave out methods/variables if unknown type')
},
// parse doxygen xml -> js-format specs
// TODO: figure out whether we need to document any protected methods/variables
parse: function() {
var XML_GRAMMAR_SPEC = 'grammars/xml.peg';
var NAMESPACE_SPEC = xml2js.opts.inputdir + '/namespace' + xml2js.opts.module + '.xml';
var CLASS_SPEC = function(c) { return xml2js.opts.inputdir + '/' + c + '.xml'; }
var TYPES_SPEC = xml2js.opts.inputdir + '/types_8h.xml';
xml2js.MODULE = xml2js.opts.module;
return Promise.join(createXmlParser(XML_GRAMMAR_SPEC),
xml2js.opts.typemaps ? initCustomPointerTypemaps(xml2js.opts.typemaps) : Promise.resolve(),
fs.readFileAsync(NAMESPACE_SPEC, 'utf8'),
fs.existsSync(TYPES_SPEC) ? fs.readFileAsync(TYPES_SPEC, 'utf8') : Promise.resolve(null),
function(xmlparser, ignore, xml, xml_types) {
if (xml_types != null) {
_.extend(xml2js.ENUMS, getEnums(xmlparser.parse(xml_types)[0], false));
_.extend(xml2js.ENUMS_BY_GROUP, getEnums(xmlparser.parse(xml_types)[0], true));
}
var spec_c = xmlparser.parse(xml)[0];
_.extend(xml2js.ENUMS, getEnums(spec_c, false));
_.extend(xml2js.ENUMS_BY_GROUP, getEnums(spec_c, true));
_.extend(xml2js.METHODS, getMethods(spec_c));
_.each(getSubclassNames(spec_c), function(className) { xml2js.CLASSES[className] = {} });
var parseClasses = _.map(getSubclasses(spec_c), function(c) {
return fs.readFileAsync(CLASS_SPEC(c), 'utf8').then(function(xml) {
try {
var spec_c = xmlparser.parse(xml)[0];
var className = getName(spec_c);
_.extend(xml2js.CLASSES[className], {
description: getDescription(spec_c),
parent: getParent(spec_c, className),
enums: getEnums(spec_c, false, className),
enums_by_group: getEnums(spec_c, true, className),
variables: getVariables(spec_c, className),
methods: getMethods(spec_c, className)
});
} catch(e) {
console.log(e.toString() + ': class ' + className + ' was not parsed correctly.');
}
});
});
var parseGroups = fs.readdirAsync(xml2js.opts.inputdir).then(function(files) {
var groupxmlfiles = _.filter(files, function(fn) {
return ((path.extname(fn) == '.xml') && (path.basename(fn).search(/^group/) != -1));
});
return Promise.all(_.map(groupxmlfiles, function(fn) {
return fs.readFileAsync(xml2js.opts.inputdir + '/' + fn, 'utf8').then(function(xml) {
var spec_c = xmlparser.parse(xml)[0];
if (_.isEmpty(getSubmodules(spec_c))) {
var group = getName(spec_c);
var classes = getSubclassNames(spec_c);
xml2js.CLASSGROUPS[group] = {
description: getDescription(spec_c),
classes: classes
};
_.each(classes, function(c) {
if (_.has(xml2js.CLASSES, c)) {
xml2js.CLASSES[c].group = group;
} else {
console.log('Warning: Group ' + group + ' has unknown class ' + c);
}
});
}
});
}));
});
return Promise.all(parseClasses.concat(parseGroups));
}).then(function() {
if (!_.isEmpty(xml2js.CLASSGROUPS)) {
// try to categorize ungrouped classes, if any
var grouped = _.flatten(_.pluck(_.values(xml2js.CLASSGROUPS), 'classes'));
var ungrouped = _.difference(_.keys(xml2js.CLASSES), grouped);
_.each(ungrouped, function(c) {
_.each(findUsage(c), function(group) {
xml2js.CLASSGROUPS[group].classes.push(c);
});
});
grouped = _.flatten(_.pluck(_.values(xml2js.CLASSGROUPS), 'classes'));
ungrouped = _.difference(_.keys(xml2js.CLASSES), grouped);
// try to categorize ungrouped enums, if any
_.each(xml2js.ENUMS_BY_GROUP, function(enumGroupSpec, enumGroupName) {
_.each(findUsage(enumGroupName, true), function(c) {
xml2js.CLASSES[c].enums_by_group[enumGroupName] = enumGroupSpec;
_.each(enumGroupSpec.members, function(enumName) {
xml2js.CLASSES[c].enums[enumName] = xml2js.ENUMS[enumName];
delete xml2js.ENUMS[enumName];
});
delete xml2js.ENUMS_BY_GROUP[enumGroupName];
});
});
}
}).then(function() {
if (xml2js.opts.custom && fs.existsSync(xml2js.opts.custom)) {
return fs.readFileAsync(xml2js.opts.custom, 'utf8').then(function(custom) {
try {
customizeMethods(JSON.parse(custom));
} catch(e) {
console.log('invalid custom.json, ignored. ' + e.toString());
}
});
} else {
console.log(xml2js.opts.custom ? ('Error: No such customization file exists: ' + xml2js.opts.custom) : 'No customizations given.');
}
}).then(function() {
generateCustomPointerClasses();
validateMethods();
validateVars();
return _.pick(xml2js, 'MODULE', 'ENUMS', 'ENUMS_BY_GROUP', 'METHODS', 'CLASSES', 'CLASSGROUPS');
});
}
};
// create an xml parser
function createXmlParser(XML_GRAMMAR_SPEC) {
return fs.readFileAsync(XML_GRAMMAR_SPEC, 'utf8').then(function(xmlgrammar) {
return peg.buildParser(xmlgrammar);
});
}
// configure c->js typemaps from custom swig directives
// TODO: many built in assumptions based on current upm file structures & .i customizations
function initCustomPointerTypemaps(typemapsdir) {
return fs.readdirAsync(typemapsdir).then(function(dirs) {
return Promise.all(_.map(dirs, function(dir) {
// get all js*.i directives from class-specific subdirectories, to be parsed below for %typemaps directives
return fs.readdirAsync(typemapsdir + '/' + dir).then(function(files) {
var directive = _.find(files, function(fn) {
return ((path.extname(fn) == '.i') && (path.basename(fn).search(/^js/) != -1));
});
var data = {};
if (directive) {
data[dir] = typemapsdir + '/' + dir + '/' + directive;
}
return data;
}).catch(function(e) {
// get all .i directives from top level directory, and parse for %array_class directives
if (e.code == 'ENOTDIR') {
var fn = dir;
if (path.extname(fn) == '.i') {
return fs.readFileAsync(typemapsdir + '/' + fn, 'utf8').then(function(directives) {
var arraytypes = _.filter(directives.split(/\n/), function(line) {
return (line.search(/^%array_class/) != -1);
});
_.each(arraytypes, function(arraytype) {
var parsed = arraytype.match(/%array_class\(([A-Za-z0-9_]+)[\s]*,[\s]*([A-Za-z0-9_]+)\)/);
if (parsed) {
var from = parsed[1];
var to = parsed[2];
xml2js.ARRAY_TYPEMAPS[from] = { arrayType: to, classes: [] };
} else {
console.log('Incorrectly parsed array_class from ' + fn + ': ' + arraytype);
}
});
});
}
} else {
throw e;
}
});
}));
}).then(function(__directivesFiles) {
// parse for %typemaps & %pointer_functions directives
var _directivesFiles = _.filter(__directivesFiles, function(data) { return !_.isEmpty(data); });
var directivesFiles = _.object(_.map(_directivesFiles, _.keys), _.flatten(_.map(_directivesFiles, _.values)));
return Promise.all(_.map(directivesFiles, function(directivesFn, className) {
return fs.readFileAsync(directivesFn, 'utf8').then(function(directives) {
var typemaps = _.filter(directives.split(/\n/), function(line) {
return (line.search(/^%typemap/) != -1);
});
_.each(typemaps, function(typemap) {
var parsed = typemap.match(/%typemap\((in|out)\)[\s]+([A-Za-z0-9_]+[\s]*[\*])/);
if (parsed) {
var dir = parsed[1]; // TODO: ignored for now
var type = normalizePointer(parsed[2]);
var datatype = getPointerDataType(type);
if (_.has(xml2js.ARRAY_TYPEMAPS, datatype)) {
xml2js.ARRAY_TYPEMAPS[datatype].classes.push(className);
} else {
console.log('Ignored typemap from ' + directivesFn + ': ' + typemap.replace('{', '') + ' (no %array_class directive found for ' + datatype + ')');
}
} else {
console.log('Ignored typemap from ' + directivesFn + ': ' + typemap.replace('{', '') + ' (only considering in/out typemaps of pointer types)');
}
});
var ptrfns = _.filter(directives.split(/\n/), function(line) {
return (line.search(/^%pointer_functions/) != -1);
});
_.each(ptrfns, function(ptrfn) {
var parsed = ptrfn.match(/%pointer_functions\(([A-Za-z0-9_]+)[\s]*,[\s]*([A-Za-z0-9_]+)\)/);
if (parsed) {
var from = parsed[1];
var to = parsed[2];
if (!_.has(xml2js.POINTER_TYPEMAPS, className)) {
xml2js.POINTER_TYPEMAPS[className] = {};
}
xml2js.POINTER_TYPEMAPS[className][from] = to;
}
});
});
}));
});
}
// generate class specs for custom pointer types
function generateCustomPointerClasses() {
var arrayTypes = _.pluck(_.values(xml2js.ARRAY_TYPEMAPS), 'arrayType');
var pointerTypes = _.uniq(_.flatten(_.map(_.values(xml2js.POINTER_TYPEMAPS), _.values)));
_.each(arrayTypes, function(arrayType) {
var dataType = _.findKey(xml2js.ARRAY_TYPEMAPS, function(to) { return to.arrayType == arrayType; });
xml2js.CLASSES[arrayType] = {
description: 'Array of type ' + dataType + '.',
enums: {},
enums_by_group: {},
variables: {},
methods: {}
};
xml2js.CLASSES[arrayType].methods[arrayType] = {
description: 'Instantiates the array.',
params: {
nelements: {
type: 'Number',
description: 'number of elements in the array'
}
},
return: {}
};
xml2js.CLASSES[arrayType].methods.getitem = {
description: 'Access a particular element in the array.',
params: {
index: {
type: 'Number',
description: 'index of array to read from'
},
},
return: {
type: getType(dataType),
description: 'the value of the element found at the given index of the array'
}
};
xml2js.CLASSES[arrayType].methods.setitem = {
description: 'Modify a particular element in the array.',
params: {
index: {
type: 'Number',
description: 'index of array to write to'
},
value: {
type: getType(dataType),
description: 'the value to set the element found at the given index of the array'
}
},
return: {}
};
});
var pointerDataTypeMap = _.reduce(_.map(_.values(xml2js.POINTER_TYPEMAPS), _.invert), function(memo, typemap) {
return _.extend(memo, typemap);
}, {});
_.each(pointerTypes, function(pointerType) {
var dataType = pointerDataTypeMap[pointerType];
xml2js.CLASSES[pointerType] = {
description: 'Proxy object to data of type ' + dataType + '.',
enums: {},
enums_by_group: {},
variables: {},
methods: {}
};
xml2js.CLASSES[pointerType].methods[pointerType] = {
description: 'Instantiates the proxy object.',
params: {},
return: {}
};
xml2js.CLASSES[pointerType].methods.value = {
description: 'Get the value of the object.',
params: {},
return: {
type: getType(dataType),
description: 'the value of the object'
}
};
xml2js.CLASSES[pointerType].methods.assign = {
description: 'Set the value of the object.',
params: {
value: {
type: getType(dataType),
description: 'the value to set the object to'
}
},
return: {}
};
});
}
// search for usage of a type
function findUsage(type, classOnly) {
var filterClasses = function(fn) { return _.without(_.map(xml2js.CLASSES, fn), undefined); };
var usesType = function(classSpec, className) {
var methodsOfType = (_.find(classSpec.methods, function(methodSpec, methodName) {
return ((!_.isEmpty(methodSpec.return) && methodSpec.return.type == type) ||
(_.contains(_.pluck(methodSpec.params, 'type'), type)));
}) != undefined);
var variablesOfType = _.contains(_.pluck(classSpec.variable, 'type'), type);
return ((methodsOfType || variablesOfType) ? className : undefined);
};
var extendsType = function(classSpec, className) {
return ((classSpec.parent == type) ? className : undefined);
};
var classes = _.union(filterClasses(usesType), filterClasses(extendsType));
if (classOnly) {
return classes;
} else {
return _.without(_.uniq(_.pluck(_.pick(xml2js.CLASSES, classes), 'group')), undefined);
}
}
// override autogenerated methods with custom configuration
function customizeMethods(custom) {
_.each(custom, function(classMethods, className) {
_.extend(xml2js.CLASSES[className].methods, _.pick(classMethods, function(methodSpec, methodName) {
return isValidMethodSpec(methodSpec, className + '.' + methodName);
}));
});
}
// make sure methods have valid types, otherwise warn (& don't include if strict)
function validateMethods() {
xml2js.METHODS = _.pick(xml2js.METHODS, function(methodSpec, methodName) {
return hasValidTypes(methodSpec, methodName);
});
_.each(xml2js.CLASSES, function(classSpec, className) {
var valid = _.pick(classSpec.methods, function(methodSpec, methodName) {
return hasValidTypes(methodSpec, className + '.' + methodName, className);
});
if (xml2js.opts.strict) {
xml2js.CLASSES[className].methods = valid;
}
});
}
// make sure variables have valid types, otherwise warn (& don't include if strict)
function validateVars() {
_.each(xml2js.CLASSES, function(classSpec, className) {
var valid = _.pick(classSpec.variables, function(varSpec, varName) {
return ofValidType(varSpec, className + '.' + varName, className);
});
if (xml2js.opts.strict) {
xml2js.CLASSES[className].variables = valid;
}
});
}
// verify that the json spec is well formatted
function isValidMethodSpec(methodSpec, methodName) {
var valid = true;
var printIgnoredMethodOnce = _.once(function() { console.log(methodName + ' from ' + path.basename(xml2js.opts.custom) + ' is omitted from JS documentation.'); });
function checkRule(rule, errMsg) {
if (!rule) {
printIgnoredMethodOnce();
console.log(' ' + errMsg);
valid = false;
}
}
checkRule(_.has(methodSpec, 'description'), 'no description given');
checkRule(_.has(methodSpec, 'params'), 'no params given (specify "params": {} for no params)');
_.each(methodSpec.params, function(paramSpec, paramName) {
checkRule(_.has(paramSpec, 'type'), 'no type given for param ' + paramName);
checkRule(_.has(paramSpec, 'description'), 'no description given for param ' + paramName);
});
checkRule(_.has(methodSpec, 'return'), 'no return given (specify "return": {} for no return value)');
checkRule(_.has(methodSpec.return, 'type'), 'no type given for return value');
checkRule(_.has(methodSpec.return, 'description'), 'no description given for return value');
return valid;
}
// get enum specifications
function getEnums(spec_c, bygroup, parent) {
var spec_js = {};
var enumGroups = _.find(getChildren(spec_c, 'sectiondef'), function(section) {
var kind = getAttr(section, 'kind');
return ((kind == 'enum') || (kind == 'public-type'));
});
if (enumGroups) {
_.each(enumGroups.children, function(enumGroup) {
var enumGroupName = getText(getChild(enumGroup, 'name'), 'name');
var enumGroupDescription = getText(getChild(enumGroup, 'detaileddescription'), 'description');
var enumGroupVals = getChildren(enumGroup, 'enumvalue');
if (bygroup) {
spec_js[enumGroupName] = {
description: enumGroupDescription,
members: []
};
}
_.each(enumGroupVals, function(e) {
// TODO: get prefix as option
var enumName = getText(getChild(e, 'name'), 'name').replace(/^MRAA_/, '');
var enumDescription = getText(getChild(e, 'detaileddescription'), 'description');
if (!bygroup) {
spec_js[enumName] = {
type: enumGroupName,
description: enumDescription
};
} else {
spec_js[enumGroupName].members.push(enumName);
}
});
});
}
return spec_js;
}
// get the name for the module/group/class
function getName(spec_c) {
return getText(getChild(spec_c, 'compoundname'), 'name').replace(xml2js.opts.module + '::', '');
}
// get the description for the module/group/class
function getDescription(spec_c) {
return getText(getChild(spec_c, 'detaileddescription'), 'description');
}
// get the classes (xml file names) for the given module
function getSubclasses(spec_c) {
return _.map(getChildren(spec_c, 'innerclass'), function(innerclass) {
return getAttr(innerclass, 'refid');
});
}
// get the classes (class names) for the given module
function getSubclassNames(spec_c) {
return _.map(getChildren(spec_c, 'innerclass'), function(innerclass) {
return getText(innerclass).replace(xml2js.opts.module + '::', '');
});
}
// get the submodules (xml file names) for the given module
function getSubmodules(spec_c) {
return _.map(getChildren(spec_c, 'innergroup'), function(innergroup) {
return getAttr(innergroup, 'refid');
});
}
// get parent class, if any
function getParent(spec_c, className) {
var parent = getChild(spec_c, 'basecompoundref');
if (parent) {
parent = getText(parent);
if (!_.has(xml2js.CLASSES, parent)) {
console.log('WARNING: Class ' + className + ' has unknown parent class ' + parent);
}
}
return parent;
}
function hasParams(paramsSpec) {
return !(_.isEmpty(paramsSpec) ||
((_.size(paramsSpec) == 1) && getText(getChild(paramsSpec[0], 'type')) == 'void'));
}
// get method specifications for top-level module or a given class
// TODO: overloaded functions
// TODO: functions w/ invalid parameter(s)/return
function getMethods(spec_c, parent) {
var spec_js = {};
var methods = _.find(getChildren(spec_c, 'sectiondef'), function(section) {
var kind = getAttr(section, 'kind');
return ((kind == 'public-func') || (kind == 'func'));
});
if (methods) {
_.each(methods.children, function(method) {
var methodName = getText(getChild(method, 'name'), 'name');
if (methodName[0] != '~') { // filter out destructors
try {
var description = getChild(method, 'detaileddescription');
var methodDescription = getText(description, 'description');
var paramsSpec = getChildren(method, 'param');
var params = {};
if (hasParams(paramsSpec)) {
params = getParams(paramsSpec, getParamsDetails(description), methodName, parent);
}
var returnSpec = getChild(method, 'type');
var retval = {};
if (!_.isEmpty(returnSpec)) {
retval = getReturn(returnSpec, getReturnDetails(description), methodName, parent);
}
methodName = getUniqueMethodName(methodName, spec_js, parent);
spec_js[methodName] = {
description: methodDescription,
params: params,
return: retval
};
} catch(e) {
console.log((parent ? (parent + '.') : '') + methodName + ' is omitted from JS documentation.');
console.log(' ' + e.toString());
}
}
});
}
return spec_js;
}
// get a unique string to represent the name of an overloaded method
function getUniqueMethodName(methodName, module, parent) {
if (methodName in module) {
do {
methodName += '!';
} while (methodName in module);
}
return methodName;
}
// get variable specifications for a class
function getVariables(spec_c, parent) {
var spec_js = {};
var vars = _.find(getChildren(spec_c, 'sectiondef'), function(section) {
var kind = getAttr(section, 'kind');
return (kind == 'public-attrib');
});
if (vars) {
_.each(_.filter(vars.children, function(variable) {
return (getAttr(variable, 'kind') == 'variable');
}), function(variable) {
var varName = getText(getChild(variable, 'name'), 'name');
var varType = getType(getText(getChild(variable, 'type')), parent);
var varDescription = getText(getChild(variable, 'detaileddescription'));
spec_js[varName] = {
type: varType,
description: varDescription
}
});
}
return spec_js;
}
// get return value specs of a method
function getReturn(spec_c, details, method, parent) {
var retType = getType(getText(spec_c, 'type'), parent);
var retDescription = (details ? getText(details, 'description') : '');
return ((retType == 'void') ? {} : {
type: retType,
description: retDescription
});
}
// get paramater specs of a method
function getParams(spec_c, details, method, parent) {
var spec_js = {};
_.each(spec_c, function(param) {
try {
var paramType = getType(getText(getChild(param, 'type'), 'type'), parent);
var paramName = getText(getChild(param, 'declname'), 'name');
spec_js[paramName] = { type: paramType };
} catch(e) {
if (paramType == '...') {
spec_js['arguments'] = { type: paramType };
} else {
throw e;
}
}
});
_.each(details, function(param) {
var getParamName = function(p) { return getText(getChild(getChild(p, 'parameternamelist'), 'parametername'), 'name'); }
var paramName = getParamName(param);
var paramDescription = getText(getChild(param, 'parameterdescription'), 'description');
if (_.has(spec_js, paramName)) {
spec_js[paramName].description = paramDescription;
} else {
var msg = ' has documentation for an unknown parameter: ' + paramName + '. ';
var suggestions = _.difference(_.keys(spec_js), _.map(details, getParamName));
var msgAddendum = (!_.isEmpty(suggestions) ? ('Did you mean ' + suggestions.join(', or ') + '?') : '');
console.log('Warning: ' + (parent ? (parent + '.') : '') + method + msg + msgAddendum);
}
});
return spec_js;
}
// get the equivalent javascript type from the given c type
function getType(type_c, parent) {
var type_js = type_c;
_.find(xml2js.TYPEMAPS, function(to, from) {
var pattern = new RegExp(from, 'i');
if (type_c.search(pattern) == 0) {
type_js = to;
return true;
}
});
if (isPointer(type_js)) {
var dataType = getPointerDataType(type_js);
var className = parent.toLowerCase();
if (_.has(xml2js.ARRAY_TYPEMAPS, dataType) && _.contains(xml2js.ARRAY_TYPEMAPS[dataType].classes, className)) {
type_js = xml2js.ARRAY_TYPEMAPS[dataType].arrayType;
} else if (_.has(xml2js.POINTER_TYPEMAPS, className) && _.has(xml2js.POINTER_TYPEMAPS[className], dataType)) {
type_js = xml2js.POINTER_TYPEMAPS[className][dataType];
} else if (_.has(xml2js.CLASSES, dataType)) { // TODO: verify that swig does this mapping
type_js = dataType;
} else {
type_js = dataType + ' *'
}
}
return type_js;
}
// verify that all types associated with the method are valid
function hasValidTypes(methodSpec, methodName, parent) {
var valid = true;
var msg = (xml2js.opts.strict ? ' is omitted from JS documentation.' : ' has invalid type(s).');
var printIgnoredMethodOnce = _.once(function() { console.log(methodName + msg); });
_.each(methodSpec.params, function(paramSpec, paramName) {
if (!isValidType(paramSpec.type, parent)) {
valid = false;
printIgnoredMethodOnce();
console.log(' Error: parameter ' + paramName + ' has invalid type ' + typeToString(paramSpec.type));
}
});
if (!_.isEmpty(methodSpec.return) && !isValidType(methodSpec.return.type, parent)) {
valid = false;
printIgnoredMethodOnce();
console.log(' Error: returns invalid type ' + typeToString(methodSpec.return.type));
}
return valid;
}
// verify that type of variable is valid
function ofValidType(varSpec, varName, parent) {
if (isValidType(varSpec.type, parent)) {
return true;
} else {
var msgAddendum = (xml2js.opts.strict ? ' Omitted from JS documentation.' : '');
console.log('Error: ' + varName + ' is of invalid type ' + typeToString(varSpec.type) + '.' + msgAddendum);
return false;
}
}
// verify whether the given type is valid JS
function isValidType(type, parent) {
return (_.contains(_.values(xml2js.TYPEMAPS), type) ||
_.has(xml2js.CLASSES, type) ||
_.has(xml2js.ENUMS_BY_GROUP, type) ||
_.contains(['Buffer', 'Function', 'mraa_result_t'], type) ||
_.has((parent ? xml2js.CLASSES[parent].enums_by_group : []), type) ||
isValidPointerType(type, parent));
}
function isValidPointerType(type, parent) {
var className = parent.toLowerCase();
var arrayTypemap = _.find(xml2js.ARRAY_TYPEMAPS, function(to) { return to.arrayType == type; });
var valid = ((arrayTypemap && _.contains(arrayTypemap.classes, className)) ||
(_.has(xml2js.POINTER_TYPEMAPS, className) && (_.contains(_.values(xml2js.POINTER_TYPEMAPS[className]), type))));
return valid;
}
// determines whether a type looks like a c pointer
function isPointer(type) {
return (type.search(/\w+\s*(\*|&)$/) != -1);
}
// remove extraneous whitespace from pointer types as canonical representation
function normalizePointer(ptr) {
return ptr.replace(/\s*$/, '');
}
// get the data type of a pointer (e.g. int is the data type of int*)
function getPointerDataType(ptr) {
return ptr.replace(/\s*(\*|&)$/, '');
}
// print more human friendly type for error messages
function typeToString(type) {
return type.replace('*', '*');
}
// get the detailed description of a method's parameters
function getParamsDetails(spec_c) {
var paras = getChildren(spec_c, 'para');
var details = _.find(_.map(paras, function(para) {
return getChild(para, 'parameterlist');
}), function(obj) { return (obj != undefined); });
return (details ? details.children : undefined);
}
// get the detailed description of a method's return value
function getReturnDetails(spec_c) {
var paras = getChildren(spec_c, 'para');
return _.find(_.map(paras, function(para) {
return getChild(para, 'simplesect');
}), function(obj) { return ((obj != undefined) && (getAttr(obj, 'kind') == 'return')); });
}
// get (and flatten) the text of the given object
function getText(obj, why) {
// TODO: links ignored for now, patched for types for
var GENERATE_LINK = function(x) { return x + ' '; }
return _.reduce(obj.children, function(text, elem) {
if (_.isString(elem)) {
return text += elem.trim() + ' ';
} else if (_.isPlainObject(elem)) {
switch(elem.name) {
case 'para':
return text += getText(elem, why) + ' \n';
case 'ref':
return text += GENERATE_LINK(getText(elem, why));
case 'parameterlist':
case 'simplesect':
return text; // to be handled elsewhere
case 'programlisting':
case 'htmlonly':
return text; // ignored
// TODO: html doesn't seem to work for yuidoc, using markdown for now
case 'itemizedlist':
return text += '\n' + getText(elem, why) + ' \n \n';
case 'listitem':
return text += '+ ' + getText(elem, why) + '\n';
case 'bold':
return text += '__' + getText(elem, why).trim() + '__ ';
case 'ulink':
return text += '[' + getText(elem, why).trim() + '](' + getAttr(elem, 'url').trim() + ') ';
case 'image':
// TODO: copy images over; hard coded for now
var fn = getAttr(elem, 'name');
return text += ' \n \n ';
case 'linebreak':
return text += ' \n';
case 'ndash':
return text += '– ';
default:
// TODO: incomplete list of doxygen xsd implemented
console.warn('NYI Unknown Object Type: ' + elem.name);
return text;
//throw new Error('NYI Unknown Object Type: ' + elem.name);
}
} else {
throw new Error('NYI Unknown Type: ' + (typeof elem));
}
}, '').trim();
}
// get the value of attribute with the given name of the given object
function getAttr(obj, name) {
return _.find(obj.attr, function(item) {
return item.name == name;
}).value;
}
// get the child object with the given name of the given object
function getChild(obj, name) {
return _.find(obj.children, function(child) {
return child.name == name;
});
}
// get all children objects with the given name of the given object
function getChildren(obj, name) {
return _.filter(obj.children, function(child) {
return child.name == name;
});
}
// debug helper: print untruncated object
function printObj(obj) {
console.log(util.inspect(obj, false, null));
}
module.exports = xml2js;