mirror of
https://github.com/atlanticbiomedical/biomedjs.git
synced 2025-07-02 00:47:26 -04:00
644 lines
16 KiB
JavaScript
644 lines
16 KiB
JavaScript
/*!
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* Jade - Compiler
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* Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var nodes = require('./nodes')
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, filters = require('./filters')
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, doctypes = require('./doctypes')
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, selfClosing = require('./self-closing')
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, runtime = require('./runtime')
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, utils = require('./utils')
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, parseJSExpression = require('character-parser').parseMax
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, isConstant = require('constantinople')
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, toConstant = require('constantinople').toConstant
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/**
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* Initialize `Compiler` with the given `node`.
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*
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* @param {Node} node
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* @param {Object} options
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* @api public
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*/
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var Compiler = module.exports = function Compiler(node, options) {
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this.options = options = options || {};
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this.node = node;
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this.hasCompiledDoctype = false;
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this.hasCompiledTag = false;
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this.pp = options.pretty || false;
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this.debug = false !== options.compileDebug;
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this.indents = 0;
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this.parentIndents = 0;
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if (options.doctype) this.setDoctype(options.doctype);
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};
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/**
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* Compiler prototype.
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*/
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Compiler.prototype = {
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/**
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* Compile parse tree to JavaScript.
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*
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* @api public
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*/
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compile: function(){
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this.buf = [];
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if (this.pp) this.buf.push("jade.indent = [];");
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this.lastBufferedIdx = -1;
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this.visit(this.node);
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return this.buf.join('\n');
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},
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/**
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* Sets the default doctype `name`. Sets terse mode to `true` when
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* html 5 is used, causing self-closing tags to end with ">" vs "/>",
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* and boolean attributes are not mirrored.
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*
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* @param {string} name
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* @api public
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*/
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setDoctype: function(name){
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name = name || 'default';
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this.doctype = doctypes[name.toLowerCase()] || '<!DOCTYPE ' + name + '>';
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this.terse = this.doctype.toLowerCase() == '<!doctype html>';
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this.xml = 0 == this.doctype.indexOf('<?xml');
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},
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/**
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* Buffer the given `str` exactly as is or with interpolation
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*
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* @param {String} str
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* @param {Boolean} interpolate
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* @api public
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*/
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buffer: function (str, interpolate) {
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var self = this;
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if (interpolate) {
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var match = /(\\)?([#!]){((?:.|\n)*)$/.exec(str);
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if (match) {
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this.buffer(str.substr(0, match.index), false);
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if (match[1]) { // escape
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this.buffer(match[2] + '{', false);
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this.buffer(match[3], true);
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return;
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} else {
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try {
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var rest = match[3];
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var range = parseJSExpression(rest);
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var code = ('!' == match[2] ? '' : 'jade.escape') + "((jade.interp = " + range.src + ") == null ? '' : jade.interp)";
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} catch (ex) {
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throw ex;
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//didn't match, just as if escaped
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this.buffer(match[2] + '{', false);
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this.buffer(match[3], true);
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return;
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}
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this.bufferExpression(code);
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this.buffer(rest.substr(range.end + 1), true);
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return;
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}
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}
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}
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str = JSON.stringify(str);
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str = str.substr(1, str.length - 2);
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if (this.lastBufferedIdx == this.buf.length) {
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if (this.lastBufferedType === 'code') this.lastBuffered += ' + "';
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this.lastBufferedType = 'text';
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this.lastBuffered += str;
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this.buf[this.lastBufferedIdx - 1] = 'buf.push(' + this.bufferStartChar + this.lastBuffered + '");'
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} else {
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this.buf.push('buf.push("' + str + '");');
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this.lastBufferedType = 'text';
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this.bufferStartChar = '"';
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this.lastBuffered = str;
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this.lastBufferedIdx = this.buf.length;
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}
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},
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/**
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* Buffer the given `src` so it is evaluated at run time
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*
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* @param {String} src
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* @api public
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*/
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bufferExpression: function (src) {
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if (isConstant(src)) {
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return this.buffer(toConstant(src), false)
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}
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if (this.lastBufferedIdx == this.buf.length) {
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if (this.lastBufferedType === 'text') this.lastBuffered += '"';
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this.lastBufferedType = 'code';
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this.lastBuffered += ' + (' + src + ')';
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this.buf[this.lastBufferedIdx - 1] = 'buf.push(' + this.bufferStartChar + this.lastBuffered + ');'
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} else {
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this.buf.push('buf.push(' + src + ');');
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this.lastBufferedType = 'code';
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this.bufferStartChar = '';
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this.lastBuffered = '(' + src + ')';
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this.lastBufferedIdx = this.buf.length;
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}
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},
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/**
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* Buffer an indent based on the current `indent`
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* property and an additional `offset`.
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*
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* @param {Number} offset
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* @param {Boolean} newline
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* @api public
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*/
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prettyIndent: function(offset, newline){
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offset = offset || 0;
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newline = newline ? '\n' : '';
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this.buffer(newline + Array(this.indents + offset).join(' '));
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if (this.parentIndents)
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this.buf.push("buf.push.apply(buf, jade.indent);");
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},
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/**
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* Visit `node`.
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*
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* @param {Node} node
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* @api public
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*/
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visit: function(node){
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var debug = this.debug;
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if (debug) {
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this.buf.push('jade.debug.unshift({ lineno: ' + node.line
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+ ', filename: ' + (node.filename
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? JSON.stringify(node.filename)
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: 'jade.debug[0].filename')
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+ ' });');
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}
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// Massive hack to fix our context
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// stack for - else[ if] etc
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if (false === node.debug && this.debug) {
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this.buf.pop();
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this.buf.pop();
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}
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this.visitNode(node);
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if (debug) this.buf.push('jade.debug.shift();');
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},
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/**
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* Visit `node`.
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*
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* @param {Node} node
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* @api public
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*/
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visitNode: function(node){
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var name = node.constructor.name
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|| node.constructor.toString().match(/function ([^(\s]+)()/)[1];
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return this['visit' + name](node);
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},
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/**
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* Visit case `node`.
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*
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* @param {Literal} node
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* @api public
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*/
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visitCase: function(node){
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var _ = this.withinCase;
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this.withinCase = true;
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this.buf.push('switch (' + node.expr + '){');
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this.visit(node.block);
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this.buf.push('}');
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this.withinCase = _;
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},
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/**
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* Visit when `node`.
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*
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* @param {Literal} node
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* @api public
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*/
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visitWhen: function(node){
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if ('default' == node.expr) {
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this.buf.push('default:');
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} else {
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this.buf.push('case ' + node.expr + ':');
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}
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this.visit(node.block);
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this.buf.push(' break;');
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},
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/**
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* Visit literal `node`.
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*
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* @param {Literal} node
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* @api public
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*/
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visitLiteral: function(node){
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this.buffer(node.str);
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},
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/**
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* Visit all nodes in `block`.
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*
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* @param {Block} block
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* @api public
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*/
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visitBlock: function(block){
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var len = block.nodes.length
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, escape = this.escape
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, pp = this.pp
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// Block keyword has a special meaning in mixins
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if (this.parentIndents && block.mode) {
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if (pp) this.buf.push("jade.indent.push('" + Array(this.indents + 1).join(' ') + "');")
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this.buf.push('block && block();');
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if (pp) this.buf.push("jade.indent.pop();")
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return;
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}
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// Pretty print multi-line text
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if (pp && len > 1 && !escape && block.nodes[0].isText && block.nodes[1].isText)
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this.prettyIndent(1, true);
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for (var i = 0; i < len; ++i) {
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// Pretty print text
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if (pp && i > 0 && !escape && block.nodes[i].isText && block.nodes[i-1].isText)
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this.prettyIndent(1, false);
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this.visit(block.nodes[i]);
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// Multiple text nodes are separated by newlines
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if (block.nodes[i+1] && block.nodes[i].isText && block.nodes[i+1].isText)
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this.buffer('\n');
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}
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},
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/**
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* Visit `doctype`. Sets terse mode to `true` when html 5
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* is used, causing self-closing tags to end with ">" vs "/>",
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* and boolean attributes are not mirrored.
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*
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* @param {Doctype} doctype
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* @api public
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*/
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visitDoctype: function(doctype){
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if (doctype && (doctype.val || !this.doctype)) {
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this.setDoctype(doctype.val || 'default');
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}
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if (this.doctype) this.buffer(this.doctype);
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this.hasCompiledDoctype = true;
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},
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/**
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* Visit `mixin`, generating a function that
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* may be called within the template.
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*
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* @param {Mixin} mixin
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* @api public
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*/
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visitMixin: function(mixin){
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var name = mixin.name.replace(/-/g, '_') + '_mixin'
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, args = mixin.args || ''
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, block = mixin.block
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, attrs = mixin.attrs
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, pp = this.pp;
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if (mixin.call) {
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if (pp) this.buf.push("jade.indent.push('" + Array(this.indents + 1).join(' ') + "');")
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if (block || attrs.length) {
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this.buf.push(name + '.call({');
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if (block) {
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this.buf.push('block: function(){');
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// Render block with no indents, dynamically added when rendered
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this.parentIndents++;
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var _indents = this.indents;
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this.indents = 0;
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this.visit(mixin.block);
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this.indents = _indents;
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this.parentIndents--;
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if (attrs.length) {
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this.buf.push('},');
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} else {
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this.buf.push('}');
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}
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}
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if (attrs.length) {
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var val = this.attrs(attrs);
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if (val.inherits) {
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this.buf.push('attributes: jade.merge({' + val.buf
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+ '}, attributes), escaped: jade.merge(' + val.escaped + ', escaped, true)');
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} else {
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this.buf.push('attributes: {' + val.buf + '}, escaped: ' + val.escaped);
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}
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}
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if (args) {
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this.buf.push('}, ' + args + ');');
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} else {
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this.buf.push('});');
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}
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} else {
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this.buf.push(name + '(' + args + ');');
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}
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if (pp) this.buf.push("jade.indent.pop();")
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} else {
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this.buf.push('var ' + name + ' = function(' + args + '){');
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this.buf.push('var block = this.block, attributes = this.attributes || {}, escaped = this.escaped || {};');
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this.parentIndents++;
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this.visit(block);
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this.parentIndents--;
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this.buf.push('};');
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}
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},
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/**
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* Visit `tag` buffering tag markup, generating
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* attributes, visiting the `tag`'s code and block.
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*
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* @param {Tag} tag
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* @api public
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*/
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visitTag: function(tag){
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this.indents++;
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var name = tag.name
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, pp = this.pp
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, self = this;
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function bufferName() {
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if (tag.buffer) self.bufferExpression(name);
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else self.buffer(name);
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}
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if (!this.hasCompiledTag) {
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if (!this.hasCompiledDoctype && 'html' == name) {
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this.visitDoctype();
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}
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this.hasCompiledTag = true;
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}
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// pretty print
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if (pp && !tag.isInline())
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this.prettyIndent(0, true);
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if ((~selfClosing.indexOf(name) || tag.selfClosing) && !this.xml) {
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this.buffer('<');
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bufferName();
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this.visitAttributes(tag.attrs);
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this.terse
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? this.buffer('>')
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: this.buffer('/>');
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} else {
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// Optimize attributes buffering
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if (tag.attrs.length) {
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this.buffer('<');
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bufferName();
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if (tag.attrs.length) this.visitAttributes(tag.attrs);
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this.buffer('>');
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} else {
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this.buffer('<');
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bufferName();
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this.buffer('>');
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}
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if (tag.code) this.visitCode(tag.code);
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this.escape = 'pre' == tag.name;
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this.visit(tag.block);
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// pretty print
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if (pp && !tag.isInline() && 'pre' != tag.name && !tag.canInline())
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this.prettyIndent(0, true);
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this.buffer('</');
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bufferName();
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this.buffer('>');
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}
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this.indents--;
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},
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/**
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* Visit `filter`, throwing when the filter does not exist.
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*
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* @param {Filter} filter
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* @api public
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*/
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visitFilter: function(filter){
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var text = filter.block.nodes.map(
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function(node){ return node.val; }
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).join('\n');
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filter.attrs = filter.attrs || {};
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filter.attrs.filename = this.options.filename;
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this.buffer(filters(filter.name, text, filter.attrs), true);
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},
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/**
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* Visit `text` node.
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*
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* @param {Text} text
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* @api public
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*/
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visitText: function(text){
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this.buffer(text.val, true);
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},
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/**
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* Visit a `comment`, only buffering when the buffer flag is set.
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*
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* @param {Comment} comment
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* @api public
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*/
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visitComment: function(comment){
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if (!comment.buffer) return;
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if (this.pp) this.prettyIndent(1, true);
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this.buffer('<!--' + comment.val + '-->');
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},
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/**
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* Visit a `BlockComment`.
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*
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* @param {Comment} comment
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* @api public
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*/
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visitBlockComment: function(comment){
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if (!comment.buffer) return;
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if (0 == comment.val.trim().indexOf('if')) {
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this.buffer('<!--[' + comment.val.trim() + ']>');
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this.visit(comment.block);
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this.buffer('<![endif]-->');
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} else {
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this.buffer('<!--' + comment.val);
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this.visit(comment.block);
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this.buffer('-->');
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}
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},
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/**
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* Visit `code`, respecting buffer / escape flags.
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* If the code is followed by a block, wrap it in
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* a self-calling function.
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*
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* @param {Code} code
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* @api public
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*/
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visitCode: function(code){
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// Wrap code blocks with {}.
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// we only wrap unbuffered code blocks ATM
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// since they are usually flow control
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// Buffer code
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if (code.buffer) {
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var val = code.val.trimLeft();
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val = 'null == (jade.interp = '+val+') ? "" : jade.interp';
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if (code.escape) val = 'jade.escape(' + val + ')';
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this.bufferExpression(val);
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} else {
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this.buf.push(code.val);
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}
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// Block support
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if (code.block) {
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if (!code.buffer) this.buf.push('{');
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this.visit(code.block);
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if (!code.buffer) this.buf.push('}');
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}
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},
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/**
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* Visit `each` block.
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*
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* @param {Each} each
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* @api public
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*/
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visitEach: function(each){
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this.buf.push(''
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+ '// iterate ' + each.obj + '\n'
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+ ';(function(){\n'
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+ ' var $$obj = ' + each.obj + ';\n'
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+ ' if (\'number\' == typeof $$obj.length) {\n');
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if (each.alternative) {
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this.buf.push(' if ($$obj.length) {');
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}
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this.buf.push(''
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+ ' for (var ' + each.key + ' = 0, $$l = $$obj.length; ' + each.key + ' < $$l; ' + each.key + '++) {\n'
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+ ' var ' + each.val + ' = $$obj[' + each.key + '];\n');
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this.visit(each.block);
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|
|
this.buf.push(' }\n');
|
|
|
|
if (each.alternative) {
|
|
this.buf.push(' } else {');
|
|
this.visit(each.alternative);
|
|
this.buf.push(' }');
|
|
}
|
|
|
|
this.buf.push(''
|
|
+ ' } else {\n'
|
|
+ ' var $$l = 0;\n'
|
|
+ ' for (var ' + each.key + ' in $$obj) {\n'
|
|
+ ' $$l++;'
|
|
+ ' var ' + each.val + ' = $$obj[' + each.key + '];\n');
|
|
|
|
this.visit(each.block);
|
|
|
|
this.buf.push(' }\n');
|
|
if (each.alternative) {
|
|
this.buf.push(' if ($$l === 0) {');
|
|
this.visit(each.alternative);
|
|
this.buf.push(' }');
|
|
}
|
|
this.buf.push(' }\n}).call(this);\n');
|
|
},
|
|
|
|
/**
|
|
* Visit `attrs`.
|
|
*
|
|
* @param {Array} attrs
|
|
* @api public
|
|
*/
|
|
|
|
visitAttributes: function(attrs){
|
|
var val = this.attrs(attrs);
|
|
if (val.inherits) {
|
|
this.bufferExpression("jade.attrs(jade.merge({ " + val.buf +
|
|
" }, attributes), jade.merge(" + val.escaped + ", escaped, true))");
|
|
} else if (val.constant) {
|
|
this.buffer(runtime.attrs(toConstant('{' + val.buf + '}'), JSON.parse(val.escaped)));
|
|
} else {
|
|
this.bufferExpression("jade.attrs({ " + val.buf + " }, " + val.escaped + ")");
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Compile attributes.
|
|
*/
|
|
|
|
attrs: function(attrs){
|
|
var buf = []
|
|
, classes = []
|
|
, escaped = {}
|
|
, constant = attrs.every(function(attr){ return isConstant(attr.val) })
|
|
, inherits = false;
|
|
|
|
if (this.terse) buf.push('terse: true');
|
|
|
|
attrs.forEach(function(attr){
|
|
if (attr.name == 'attributes') return inherits = true;
|
|
escaped[attr.name] = attr.escaped;
|
|
if (attr.name == 'class') {
|
|
classes.push('(' + attr.val + ')');
|
|
} else {
|
|
var pair = "'" + attr.name + "':(" + attr.val + ')';
|
|
buf.push(pair);
|
|
}
|
|
});
|
|
|
|
if (classes.length) {
|
|
buf.push('"class": [' + classes.join(',') + ']');
|
|
}
|
|
|
|
return {
|
|
buf: buf.join(', '),
|
|
escaped: JSON.stringify(escaped),
|
|
inherits: inherits,
|
|
constant: constant
|
|
};
|
|
}
|
|
}; |