/**
*
* showdown: https://github.com/showdownjs/showdown
*
* author: Di (微信小程序开发工程师)
* organization: WeAppDev(微信小程序开发论坛)(http://weappdev.com)
* 垂直微信小程序开发交流社区
*
* github地址: https://github.com/icindy/wxParse
*
* for: 微信小程序富文本解析
* detail : http://weappdev.com/t/wxparse-alpha0-1-html-markdown/184
*/
function getDefaultOpts(simple) {
'use strict';
var defaultOptions = {
omitExtraWLInCodeBlocks: {
defaultValue: false,
describe: 'Omit the default extra whiteline added to code blocks',
type: 'boolean'
},
noHeaderId: {
defaultValue: false,
describe: 'Turn on/off generated header id',
type: 'boolean'
},
prefixHeaderId: {
defaultValue: false,
describe: 'Specify a prefix to generated header ids',
type: 'string'
},
headerLevelStart: {
defaultValue: false,
describe: 'The header blocks level start',
type: 'integer'
},
parseImgDimensions: {
defaultValue: false,
describe: 'Turn on/off image dimension parsing',
type: 'boolean'
},
simplifiedAutoLink: {
defaultValue: false,
describe: 'Turn on/off GFM autolink style',
type: 'boolean'
},
literalMidWordUnderscores: {
defaultValue: false,
describe: 'Parse midword underscores as literal underscores',
type: 'boolean'
},
strikethrough: {
defaultValue: false,
describe: 'Turn on/off strikethrough support',
type: 'boolean'
},
tables: {
defaultValue: false,
describe: 'Turn on/off tables support',
type: 'boolean'
},
tablesHeaderId: {
defaultValue: false,
describe: 'Add an id to table headers',
type: 'boolean'
},
ghCodeBlocks: {
defaultValue: true,
describe: 'Turn on/off GFM fenced code blocks support',
type: 'boolean'
},
tasklists: {
defaultValue: false,
describe: 'Turn on/off GFM tasklist support',
type: 'boolean'
},
smoothLivePreview: {
defaultValue: false,
describe: 'Prevents weird effects in live previews due to incomplete input',
type: 'boolean'
},
smartIndentationFix: {
defaultValue: false,
description: 'Tries to smartly fix identation in es6 strings',
type: 'boolean'
}
};
if (simple === false) {
return JSON.parse(JSON.stringify(defaultOptions));
}
var ret = {};
for (var opt in defaultOptions) {
if (defaultOptions.hasOwnProperty(opt)) {
ret[opt] = defaultOptions[opt].defaultValue;
}
}
return ret;
}
/**
* Created by Tivie on 06-01-2015.
*/
// Private properties
var showdown = {},
parsers = {},
extensions = {},
globalOptions = getDefaultOpts(true),
flavor = {
github: {
omitExtraWLInCodeBlocks: true,
prefixHeaderId: 'user-content-',
simplifiedAutoLink: true,
literalMidWordUnderscores: true,
strikethrough: true,
tables: true,
tablesHeaderId: true,
ghCodeBlocks: true,
tasklists: true
},
vanilla: getDefaultOpts(true)
};
/**
* helper namespace
* @type {{}}
*/
showdown.helper = {};
/**
* TODO LEGACY SUPPORT CODE
* @type {{}}
*/
showdown.extensions = {};
/**
* Set a global option
* @static
* @param {string} key
* @param {*} value
* @returns {showdown}
*/
showdown.setOption = function (key, value) {
'use strict';
globalOptions[key] = value;
return this;
};
/**
* Get a global option
* @static
* @param {string} key
* @returns {*}
*/
showdown.getOption = function (key) {
'use strict';
return globalOptions[key];
};
/**
* Get the global options
* @static
* @returns {{}}
*/
showdown.getOptions = function () {
'use strict';
return globalOptions;
};
/**
* Reset global options to the default values
* @static
*/
showdown.resetOptions = function () {
'use strict';
globalOptions = getDefaultOpts(true);
};
/**
* Set the flavor showdown should use as default
* @param {string} name
*/
showdown.setFlavor = function (name) {
'use strict';
if (flavor.hasOwnProperty(name)) {
var preset = flavor[name];
for (var option in preset) {
if (preset.hasOwnProperty(option)) {
globalOptions[option] = preset[option];
}
}
}
};
/**
* Get the default options
* @static
* @param {boolean} [simple=true]
* @returns {{}}
*/
showdown.getDefaultOptions = function (simple) {
'use strict';
return getDefaultOpts(simple);
};
/**
* Get or set a subParser
*
* subParser(name) - Get a registered subParser
* subParser(name, func) - Register a subParser
* @static
* @param {string} name
* @param {function} [func]
* @returns {*}
*/
showdown.subParser = function (name, func) {
'use strict';
if (showdown.helper.isString(name)) {
if (typeof func !== 'undefined') {
parsers[name] = func;
} else {
if (parsers.hasOwnProperty(name)) {
return parsers[name];
} else {
throw Error('SubParser named ' + name + ' not registered!');
}
}
}
};
/**
* Gets or registers an extension
* @static
* @param {string} name
* @param {object|function=} ext
* @returns {*}
*/
showdown.extension = function (name, ext) {
'use strict';
if (!showdown.helper.isString(name)) {
throw Error('Extension \'name\' must be a string');
}
name = showdown.helper.stdExtName(name);
// Getter
if (showdown.helper.isUndefined(ext)) {
if (!extensions.hasOwnProperty(name)) {
throw Error('Extension named ' + name + ' is not registered!');
}
return extensions[name];
// Setter
} else {
// Expand extension if it's wrapped in a function
if (typeof ext === 'function') {
ext = ext();
}
// Ensure extension is an array
if (!showdown.helper.isArray(ext)) {
ext = [ext];
}
var validExtension = validate(ext, name);
if (validExtension.valid) {
extensions[name] = ext;
} else {
throw Error(validExtension.error);
}
}
};
/**
* Gets all extensions registered
* @returns {{}}
*/
showdown.getAllExtensions = function () {
'use strict';
return extensions;
};
/**
* Remove an extension
* @param {string} name
*/
showdown.removeExtension = function (name) {
'use strict';
delete extensions[name];
};
/**
* Removes all extensions
*/
showdown.resetExtensions = function () {
'use strict';
extensions = {};
};
/**
* Validate extension
* @param {array} extension
* @param {string} name
* @returns {{valid: boolean, error: string}}
*/
function validate(extension, name) {
'use strict';
var errMsg = (name) ? 'Error in ' + name + ' extension->' : 'Error in unnamed extension',
ret = {
valid: true,
error: ''
};
if (!showdown.helper.isArray(extension)) {
extension = [extension];
}
for (var i = 0; i < extension.length; ++i) {
var baseMsg = errMsg + ' sub-extension ' + i + ': ',
ext = extension[i];
if (typeof ext !== 'object') {
ret.valid = false;
ret.error = baseMsg + 'must be an object, but ' + typeof ext + ' given';
return ret;
}
if (!showdown.helper.isString(ext.type)) {
ret.valid = false;
ret.error = baseMsg + 'property "type" must be a string, but ' + typeof ext.type + ' given';
return ret;
}
var type = ext.type = ext.type.toLowerCase();
// normalize extension type
if (type === 'language') {
type = ext.type = 'lang';
}
if (type === 'html') {
type = ext.type = 'output';
}
if (type !== 'lang' && type !== 'output' && type !== 'listener') {
ret.valid = false;
ret.error = baseMsg + 'type ' + type + ' is not recognized. Valid values: "lang/language", "output/html" or "listener"';
return ret;
}