437 lines
16 KiB
JavaScript
437 lines
16 KiB
JavaScript
/*
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Copyright (c) 2013, Fabien Meghazi
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Released under the MIT license
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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// vim:set et fdm=syntax fdl=0 fdc=3 fdn=2:
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//---------------------------------------------------------
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// QWeb javascript
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//---------------------------------------------------------
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/*
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TODO
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String parsing
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if (window.DOMParser) {
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parser=new DOMParser();
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xmlDoc=parser.parseFromString(text,"text/xml");
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} else {
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xmlDoc=new ActiveXObject("Msxml2.DOMDocument.4.0");
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xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
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Which versions to try, it's confusing...
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xmlDoc.async="false";
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xmlDoc.async=false;
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xmlDoc.preserveWhiteSpace=true;
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xmlDoc.load("f.xml");
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xmlDoc.loadXML(text); ?
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}
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Support space in IE by reparsing the responseText
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xmlhttp.responseXML.loadXML(xmlhttp.responseText); ?
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Preprocess: (nice optimization)
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preprocess by flattening all non t- element to a TEXT_NODE.
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count the number of "\n" in text nodes to give an aproximate LINE NUMBER on elements for error reporting
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if from IE HTMLDOM use if(a[i].specified) to avoid 88 empty attributes per element during the preprocess,
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implement t-trim 'left' 'right' 'both', is it needed ? inner=render_trim(l_inner.join(), t_att)
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Ruby/python: to backport from javascript to python/ruby render_node to use regexp, factorize foreach %var, t-att test for tuple(attname,value)
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DONE
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we reintroduced t-att-id, no more t-esc-id because of the new convention t-att="["id","val"]"
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*/
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var QWeb = {
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templates:{},
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prefix:"t",
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reg:new RegExp(),
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tag:{},
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att:{},
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ValueException: function (value, message) {
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this.value = value;
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this.message = message;
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},
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eval_object:function(e, v) {
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// TODO: Currently this will also replace and, or, ... in strings. Try
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// 'hi boys and girls' != '' and 1 == 1 -- will be replaced to : 'hi boys && girls' != '' && 1 == 1
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// try to find a solution without tokenizing
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e = '(' + e + ')';
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e = e.replace(/\band\b/g, " && ");
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e = e.replace(/\bor\b/g, " || ");
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e = e.replace(/\bgt\b/g, " > ");
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e = e.replace(/\bgte\b/g, " >= ");
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e = e.replace(/\blt\b/g, " < ");
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e = e.replace(/\blte\b/g, " <= ");
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if (v[e] != undefined) {
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return v[e];
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} else {
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with (v) return eval(e);
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}
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},
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eval_str:function(e, v) {
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var r = this.eval_object(e, v);
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r = (typeof(r) == "undefined" || r == null) ? "" : r.toString();
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return e == "0" ? v["0"] : r;
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},
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eval_format:function(e, v) {
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var m, src = e.split(/#/), r = src[0];
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for (var i = 1; i < src.length; i++) {
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if (m = src[i].match(/^{(.*)}(.*)/)) {
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r += this.eval_str(m[1], v) + m[2];
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} else {
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r += "#" + src[i];
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}
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}
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return r;
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},
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eval_bool:function(e, v) {
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return !!this.eval_object(e, v);
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},
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trim : function(v, mode) {
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if (!v || !mode) return v;
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switch (mode) {
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case 'both':
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return v.replace(/^\s*|\s*$/g, "");
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case "left":
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return v.replace(/^\s*/, "");
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case "right":
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return v.replace(/\s*$/, "");
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}
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throw new QWeb.ValueException(
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mode, "unknown trimming mode, trim mode must follow the pattern '[inner] (left|right|both)'");
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},
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escape_text:function(s) {
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return s.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">");
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},
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escape_att:function(s) {
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return s.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">").replace(/"/g, """);
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},
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render_node : function(e, v, inner_trim) {
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if (e.nodeType == 3) {
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return inner_trim ? this.trim(e.data, inner_trim) : e.data;
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}
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if (e.nodeType == 1) {
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var g_att = {};
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var t_att = {};
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var t_render = null;
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var a = e.attributes;
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for (var i = 0; i < a.length; i++) {
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var an = a[i].name,av = a[i].value;
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var m;
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if (m = an.match(this.reg)) {
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var n = m[1];
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if (n == "eval") {
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n = m[2].substring(1);
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av = this.eval_str(av, v);
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}
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var f;
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if (f = this.att[n]) {
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this[f](e, t_att, g_att, v, m[2], av);
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} else if (f = this.tag[n]) {
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t_render = f;
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}
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t_att[n] = av;
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} else {
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g_att[an] = av;
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}
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}
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if (inner_trim && !t_att["trim"]) {
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t_att["trim"] = "inner " + inner_trim;
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}
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if (t_render) {
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return this[t_render](e, t_att, g_att, v);
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}
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return this.render_element(e, t_att, g_att, v);
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}
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return "";
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},
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render_element:function(e, t_att, g_att, v) {
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var inner = "", ec = e.childNodes, trim = t_att["trim"], inner_trim;
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if (trim) {
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if (/\binner\b/.test(trim)) {
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inner_trim = true;
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if (trim == 'inner') {
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trim = "both";
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}
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}
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var tm = /\b(both|left|right)\b/.exec(trim);
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if (tm) trim = tm[1];
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}
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for (var i = 0; i < ec.length; i++) {
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inner += inner_trim ? this.trim(this.render_node(ec[i], v, inner_trim ? trim : null), trim) : this.render_node(ec[i], v, inner_trim ? trim : null);
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}
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if (trim && !inner_trim) {
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inner = this.trim(inner, trim);
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}
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if (e.tagName == this.prefix) {
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return inner;
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}
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var att = "";
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for (var an in g_att) {
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att += " " + an + '="' + this.escape_att(g_att[an]) + '"';
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}
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// Some IE versions have problems with closed tags
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var opentag = !!t_att['opentag'] && this.eval_bool(t_att["opentag"], v);
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return inner.length || opentag ? "<" + e.tagName + att + ">" + inner + "</" + e.tagName + ">" : "<" + e.tagName + att + "/>";
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},
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render_att_att:function(e, t_att, g_att, v, ext, av) {
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if (ext) {
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var attv = this.eval_object(av, v);
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if (attv != null) {
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g_att[ext.substring(1)] = attv.toString();
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}
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} else {
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var o = this.eval_object(av, v);
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if (o != null) {
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// TODO: http://bonsaiden.github.com/JavaScript-Garden/#types.typeof
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if (o.constructor == Array && o.length > 1 && o[1] != null) {
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g_att[o[0]] = new String(o[1]);
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} else if (o.constructor == Object) {
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for (var i in o) {
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if(o[i]!=null) {
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g_att[i] = new String(o[i]);
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}
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}
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}
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}
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}
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},
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render_att_attf:function(e, t_att, g_att, v, ext, av) {
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g_att[ext.substring(1)] = this.eval_format(av, v);
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},
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render_tag_raw:function(e, t_att, g_att, v) {
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return this.eval_str(t_att["raw"], v);
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},
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render_tag_rawf:function(e, t_att, g_att, v) {
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return this.eval_format(t_att["rawf"], v);
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},
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/*
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* Idea: if the name of the tag != t render the tag around the value <a name="a" t-esc="label"/>
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*/
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render_tag_esc:function(e, t_att, g_att, v) {
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return this.escape_text(this.eval_str(t_att["esc"], v));
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},
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render_tag_escf:function(e, t_att, g_att, v) {
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return this.escape_text(this.eval_format(t_att["escf"], v));
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},
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render_tag_if:function(e, t_att, g_att, v) {
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return this.eval_bool(t_att["if"], v) ? this.render_element(e, t_att, g_att, v) : "";
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},
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render_tag_set:function(e, t_att, g_att, v) {
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var ev = t_att["value"];
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if (ev && ev.constructor != Function) {
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v[t_att["set"]] = this.eval_object(ev, v);
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} else {
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v[t_att["set"]] = this.render_element(e, t_att, g_att, v);
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}
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return "";
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},
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render_tag_call:function(e, t_att, g_att, v) {
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var d = v;
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if (!t_att["import"]) {
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d = {};
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for (var i in v) {
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d[i] = v[i];
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}
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}
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d["0"] = this.render_element(e, t_att, g_att, d);
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return this.render(t_att["call"], d);
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},
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render_tag_js:function(e, t_att, g_att, v) {
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var dict_name = t_att["js"] || "dict";
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v[dict_name] = v;
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var r = this.eval_str(this.render_element(e, t_att, g_att, v), v);
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delete(v[dict_name]);
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return r || '';
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},
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/**
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* Renders a foreach loop (@t-foreach).
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*
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* Adds the following elements to its context, where <code>${name}</code>
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* is specified via <code>@t-as</code>:
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* * <code>${name}</code> The current element itself
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* * <code>${name}_value</code> Same as <code>${name}</code>
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* * <code>${name}_index</code> The 0-based index of the current element
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* * <code>${name}_first</code> Whether the current element is the first one
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* * <code>${name}_parity</code> odd|even (as strings)
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* * <code>${name}_all</code> The iterated collection itself
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*
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* If the collection being iterated is an array, also adds:
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* * <code>${name}_last</code> Whether the current element is the last one
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* * All members of the current object
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*
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* If the collection being iterated is an object, the value is actually the object's key
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*
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* @param e ?
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* @param t_att attributes of the element being <code>t-foreach</code>'d
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* @param g_att ?
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* @param old_context the context in which the foreach is evaluated
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*/
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render_tag_foreach:function(e, t_att, g_att, old_context) {
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var expr = t_att["foreach"];
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var enu = this.eval_object(expr, old_context);
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var ru = [];
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if (enu) {
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var val = t_att['as'] || expr.replace(/[^a-zA-Z0-9]/g, '_');
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var context = {};
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for (var i in old_context) {
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context[i] = old_context[i];
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}
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context[val + "_all"] = enu;
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var val_value = val + "_value",
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val_index = val + "_index",
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val_first = val + "_first",
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val_last = val + "_last",
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val_parity = val + "_parity";
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var size = enu.length;
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if (size) {
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context[val + "_size"] = size;
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for (var j = 0; j < size; j++) {
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var cur = enu[j];
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context[val_value] = cur;
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context[val_index] = j;
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context[val_first] = j == 0;
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context[val_last] = j + 1 == size;
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context[val_parity] = (j % 2 == 1 ? 'odd' : 'even');
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if (cur.constructor == Object) {
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for (var k in cur) {
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context[k] = cur[k];
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}
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}
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context[val] = cur;
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var r = this.render_element(e, t_att, g_att, context);
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ru.push(r);
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}
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} else {
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var index = 0;
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for (cur in enu) {
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context[val_value] = cur;
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context[val_index] = index;
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context[val_first] = index == 0;
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context[val_parity] = (index % 2 == 1 ? 'odd' : 'even');
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context[val] = cur;
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ru.push(this.render_element(e, t_att, g_att, context));
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index += 1;
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}
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}
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return ru.join("");
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} else {
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return "qweb: foreach " + expr + " not found.";
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}
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},
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hash:function() {
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var l = [], m;
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for (var i in this) {
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if (m = i.match(/render_tag_(.*)/)) {
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this.tag[m[1]] = i;
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l.push(m[1]);
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} else if (m = i.match(/render_att_(.*)/)) {
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this.att[m[1]] = i;
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l.push(m[1]);
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}
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}
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l.sort(function(a, b) {
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return a.length > b.length ? -1 : 1;
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});
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var s = "^" + this.prefix + "-(eval|" + l.join("|") + "|.*)(.*)$";
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this.reg = new RegExp(s);
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},
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/**
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* returns the correct XMLHttpRequest instance for the browser, or null if
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* it was not able to build any XHR instance.
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*
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* @returns XMLHttpRequest|MSXML2.XMLHTTP.3.0|null
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*/
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get_xhr:function () {
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if (window.XMLHttpRequest) {
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return new window.XMLHttpRequest();
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}
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try {
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return new ActiveXObject('MSXML2.XMLHTTP.3.0');
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} catch(e) {
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return null;
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}
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},
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load_xml:function(s) {
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var xml;
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if (s[0] == "<") {
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/*
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manque ca pour sarrisa
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if(window.DOMParser){
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mozilla
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if(!window.DOMParser){
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var doc = Sarissa.getDomDocument();
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doc.loadXML(sXml);
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return doc;
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};
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};
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*/
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} else {
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var req = this.get_xhr();
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if (req) {
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req.open("GET", s, false);
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req.send(null);
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//if ie r.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
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xml = req.responseXML;
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/*
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TODO
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if intsernetexploror
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getdomimplmentation() for try catch
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responseXML.getImplet
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d=domimple()
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d.preserverWhitespace=1
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d.loadXML()
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xml.preserverWhitespace=1
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xml.loadXML(r.reponseText)
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*/
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return xml;
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}
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}
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},
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add_template:function(e) {
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// TODO: keep sources so we can implement reload()
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this.hash();
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if (e.constructor == String) {
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e = this.load_xml(e);
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}
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var ec = e.documentElement ? e.documentElement.childNodes : ( e.childNodes ? e.childNodes : [] );
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for (var i = 0; i < ec.length; i++) {
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var n = ec[i];
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if (n.nodeType == 1) {
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var name = n.getAttribute(this.prefix + "-name");
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this.templates[name] = n;
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}
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}
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},
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render:function(name, v) {
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var e;
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if (e = this.templates[name]) {
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return this.render_node(e, v);
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}
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return "template " + name + " not found";
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}
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};
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