mirror of
https://github.com/twbs/bootstrap.git
synced 2024-12-10 22:24:19 +01:00
349 lines
9.3 KiB
JavaScript
349 lines
9.3 KiB
JavaScript
/*
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* Copyright 2011 Twitter, Inc.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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(function (Hogan) {
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// Setup regex assignments
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// remove whitespace according to Mustache spec
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var rIsWhitespace = /\S/,
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rQuot = /\"/g,
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rNewline = /\n/g,
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rCr = /\r/g,
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rSlash = /\\/g,
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tagTypes = {
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'#': 1, '^': 2, '/': 3, '!': 4, '>': 5,
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'<': 6, '=': 7, '_v': 8, '{': 9, '&': 10
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};
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Hogan.scan = function scan(text, delimiters) {
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var len = text.length,
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IN_TEXT = 0,
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IN_TAG_TYPE = 1,
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IN_TAG = 2,
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state = IN_TEXT,
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tagType = null,
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tag = null,
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buf = '',
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tokens = [],
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seenTag = false,
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i = 0,
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lineStart = 0,
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otag = '{{',
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ctag = '}}';
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function addBuf() {
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if (buf.length > 0) {
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tokens.push(new String(buf));
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buf = '';
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}
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}
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function lineIsWhitespace() {
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var isAllWhitespace = true;
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for (var j = lineStart; j < tokens.length; j++) {
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isAllWhitespace =
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(tokens[j].tag && tagTypes[tokens[j].tag] < tagTypes['_v']) ||
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(!tokens[j].tag && tokens[j].match(rIsWhitespace) === null);
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if (!isAllWhitespace) {
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return false;
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}
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}
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return isAllWhitespace;
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}
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function filterLine(haveSeenTag, noNewLine) {
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addBuf();
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if (haveSeenTag && lineIsWhitespace()) {
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for (var j = lineStart, next; j < tokens.length; j++) {
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if (!tokens[j].tag) {
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if ((next = tokens[j+1]) && next.tag == '>') {
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// set indent to token value
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next.indent = tokens[j].toString()
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}
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tokens.splice(j, 1);
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}
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}
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} else if (!noNewLine) {
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tokens.push({tag:'\n'});
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}
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seenTag = false;
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lineStart = tokens.length;
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}
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function changeDelimiters(text, index) {
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var close = '=' + ctag,
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closeIndex = text.indexOf(close, index),
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delimiters = trim(
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text.substring(text.indexOf('=', index) + 1, closeIndex)
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).split(' ');
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otag = delimiters[0];
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ctag = delimiters[1];
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return closeIndex + close.length - 1;
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}
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if (delimiters) {
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delimiters = delimiters.split(' ');
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otag = delimiters[0];
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ctag = delimiters[1];
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}
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for (i = 0; i < len; i++) {
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if (state == IN_TEXT) {
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if (tagChange(otag, text, i)) {
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--i;
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addBuf();
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state = IN_TAG_TYPE;
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} else {
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if (text.charAt(i) == '\n') {
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filterLine(seenTag);
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} else {
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buf += text.charAt(i);
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}
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}
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} else if (state == IN_TAG_TYPE) {
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i += otag.length - 1;
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tag = tagTypes[text.charAt(i + 1)];
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tagType = tag ? text.charAt(i + 1) : '_v';
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if (tagType == '=') {
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i = changeDelimiters(text, i);
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state = IN_TEXT;
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} else {
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if (tag) {
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i++;
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}
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state = IN_TAG;
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}
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seenTag = i;
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} else {
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if (tagChange(ctag, text, i)) {
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tokens.push({tag: tagType, n: trim(buf), otag: otag, ctag: ctag,
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i: (tagType == '/') ? seenTag - ctag.length : i + otag.length});
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buf = '';
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i += ctag.length - 1;
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state = IN_TEXT;
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if (tagType == '{') {
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if (ctag == '}}') {
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i++;
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} else {
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cleanTripleStache(tokens[tokens.length - 1]);
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}
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}
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} else {
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buf += text.charAt(i);
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}
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}
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}
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filterLine(seenTag, true);
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return tokens;
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}
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function cleanTripleStache(token) {
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if (token.n.substr(token.n.length - 1) === '}') {
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token.n = token.n.substring(0, token.n.length - 1);
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}
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}
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function trim(s) {
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if (s.trim) {
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return s.trim();
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}
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return s.replace(/^\s*|\s*$/g, '');
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}
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function tagChange(tag, text, index) {
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if (text.charAt(index) != tag.charAt(0)) {
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return false;
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}
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for (var i = 1, l = tag.length; i < l; i++) {
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if (text.charAt(index + i) != tag.charAt(i)) {
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return false;
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}
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}
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return true;
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}
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function buildTree(tokens, kind, stack, customTags) {
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var instructions = [],
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opener = null,
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token = null;
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while (tokens.length > 0) {
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token = tokens.shift();
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if (token.tag == '#' || token.tag == '^' || isOpener(token, customTags)) {
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stack.push(token);
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token.nodes = buildTree(tokens, token.tag, stack, customTags);
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instructions.push(token);
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} else if (token.tag == '/') {
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if (stack.length === 0) {
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throw new Error('Closing tag without opener: /' + token.n);
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}
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opener = stack.pop();
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if (token.n != opener.n && !isCloser(token.n, opener.n, customTags)) {
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throw new Error('Nesting error: ' + opener.n + ' vs. ' + token.n);
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}
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opener.end = token.i;
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return instructions;
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} else {
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instructions.push(token);
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}
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}
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if (stack.length > 0) {
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throw new Error('missing closing tag: ' + stack.pop().n);
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}
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return instructions;
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}
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function isOpener(token, tags) {
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for (var i = 0, l = tags.length; i < l; i++) {
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if (tags[i].o == token.n) {
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token.tag = '#';
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return true;
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}
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}
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}
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function isCloser(close, open, tags) {
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for (var i = 0, l = tags.length; i < l; i++) {
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if (tags[i].c == close && tags[i].o == open) {
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return true;
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}
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}
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}
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function writeCode(tree) {
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return 'i = i || "";var b = i + "";var _ = this;' + walk(tree) + 'return b;';
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}
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Hogan.generate = function (code, text, options) {
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if (options.asString) {
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return 'function(c,p,i){' + code + ';}';
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}
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return new Hogan.Template(new Function('c', 'p', 'i', code), text, Hogan);
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}
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function esc(s) {
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return s.replace(rSlash, '\\\\')
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.replace(rQuot, '\\\"')
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.replace(rNewline, '\\n')
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.replace(rCr, '\\r');
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}
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function chooseMethod(s) {
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return (~s.indexOf('.')) ? 'd' : 'f';
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}
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function walk(tree) {
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var code = '';
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for (var i = 0, l = tree.length; i < l; i++) {
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var tag = tree[i].tag;
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if (tag == '#') {
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code += section(tree[i].nodes, tree[i].n, chooseMethod(tree[i].n),
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tree[i].i, tree[i].end, tree[i].otag + " " + tree[i].ctag);
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} else if (tag == '^') {
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code += invertedSection(tree[i].nodes, tree[i].n,
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chooseMethod(tree[i].n));
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} else if (tag == '<' || tag == '>') {
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code += partial(tree[i]);
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} else if (tag == '{' || tag == '&') {
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code += tripleStache(tree[i].n, chooseMethod(tree[i].n));
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} else if (tag == '\n') {
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code += text('"\\n"' + (tree.length-1 == i ? '' : ' + i'));
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} else if (tag == '_v') {
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code += variable(tree[i].n, chooseMethod(tree[i].n));
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} else if (tag === undefined) {
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code += text('"' + esc(tree[i]) + '"');
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}
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}
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return code;
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}
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function section(nodes, id, method, start, end, tags) {
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return 'if(_.s(_.' + method + '("' + esc(id) + '",c,p,1),' +
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'c,p,0,' + start + ',' + end + ', "' + tags + '")){' +
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'b += _.rs(c,p,' +
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'function(c,p){ var b = "";' +
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walk(nodes) +
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'return b;});c.pop();}' +
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'else{b += _.b; _.b = ""};';
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}
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function invertedSection(nodes, id, method) {
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return 'if (!_.s(_.' + method + '("' + esc(id) + '",c,p,1),c,p,1,0,0,"")){' +
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walk(nodes) +
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'};';
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}
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function partial(tok) {
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return 'b += _.rp("' + esc(tok.n) + '",c,p,"' + (tok.indent || '') + '");';
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}
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function tripleStache(id, method) {
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return 'b += (_.' + method + '("' + esc(id) + '",c,p,0));';
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}
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function variable(id, method) {
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return 'b += (_.v(_.' + method + '("' + esc(id) + '",c,p,0)));';
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}
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function text(id) {
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return 'b += ' + id + ';';
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}
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Hogan.parse = function(tokens, options) {
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options = options || {};
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return buildTree(tokens, '', [], options.sectionTags || []);
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},
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Hogan.cache = {};
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Hogan.compile = function(text, options) {
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// options
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//
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// asString: false (default)
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//
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// sectionTags: [{o: '_foo', c: 'foo'}]
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// An array of object with o and c fields that indicate names for custom
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// section tags. The example above allows parsing of {{_foo}}{{/foo}}.
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//
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// delimiters: A string that overrides the default delimiters.
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// Example: "<% %>"
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//
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options = options || {};
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var key = text + '||' + !!options.asString;
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var t = this.cache[key];
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if (t) {
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return t;
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}
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t = this.generate(writeCode(this.parse(this.scan(text, options.delimiters), options)), text, options);
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return this.cache[key] = t;
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};
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})(typeof exports !== 'undefined' ? exports : Hogan);
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