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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  (function(mod) {
   5    if (typeof exports == "object" && typeof module == "object") // CommonJS
   6      mod(require("../../lib/codemirror"));
   7    else if (typeof define == "function" && define.amd) // AMD
   8      define(["../../lib/codemirror"], mod);
   9    else // Plain browser env
  10      mod(CodeMirror);
  11  })(function(CodeMirror) {
  12    "use strict";
  13  
  14    var Pos = CodeMirror.Pos;
  15  
  16    function matches(hint, typed, matchInMiddle) {
  17      if (matchInMiddle) return hint.indexOf(typed) >= 0;
  18      else return hint.lastIndexOf(typed, 0) == 0;
  19    }
  20  
  21    function getHints(cm, options) {
  22      var tags = options && options.schemaInfo;
  23      var quote = (options && options.quoteChar) || '"';
  24      var matchInMiddle = options && options.matchInMiddle;
  25      if (!tags) return;
  26      var cur = cm.getCursor(), token = cm.getTokenAt(cur);
  27      if (token.end > cur.ch) {
  28        token.end = cur.ch;
  29        token.string = token.string.slice(0, cur.ch - token.start);
  30      }
  31      var inner = CodeMirror.innerMode(cm.getMode(), token.state);
  32      if (!inner.mode.xmlCurrentTag) return
  33      var result = [], replaceToken = false, prefix;
  34      var tag = /\btag\b/.test(token.type) && !/>$/.test(token.string);
  35      var tagName = tag && /^\w/.test(token.string), tagStart;
  36  
  37      if (tagName) {
  38        var before = cm.getLine(cur.line).slice(Math.max(0, token.start - 2), token.start);
  39        var tagType = /<\/$/.test(before) ? "close" : /<$/.test(before) ? "open" : null;
  40        if (tagType) tagStart = token.start - (tagType == "close" ? 2 : 1);
  41      } else if (tag && token.string == "<") {
  42        tagType = "open";
  43      } else if (tag && token.string == "</") {
  44        tagType = "close";
  45      }
  46  
  47      var tagInfo = inner.mode.xmlCurrentTag(inner.state)
  48      if (!tag && !tagInfo || tagType) {
  49        if (tagName)
  50          prefix = token.string;
  51        replaceToken = tagType;
  52        var context = inner.mode.xmlCurrentContext ? inner.mode.xmlCurrentContext(inner.state) : []
  53        var inner = context.length && context[context.length - 1]
  54        var curTag = inner && tags[inner]
  55        var childList = inner ? curTag && curTag.children : tags["!top"];
  56        if (childList && tagType != "close") {
  57          for (var i = 0; i < childList.length; ++i) if (!prefix || matches(childList[i], prefix, matchInMiddle))
  58            result.push("<" + childList[i]);
  59        } else if (tagType != "close") {
  60          for (var name in tags)
  61            if (tags.hasOwnProperty(name) && name != "!top" && name != "!attrs" && (!prefix || matches(name, prefix, matchInMiddle)))
  62              result.push("<" + name);
  63        }
  64        if (inner && (!prefix || tagType == "close" && matches(inner, prefix, matchInMiddle)))
  65          result.push("</" + inner + ">");
  66      } else {
  67        // Attribute completion
  68        var curTag = tagInfo && tags[tagInfo.name], attrs = curTag && curTag.attrs;
  69        var globalAttrs = tags["!attrs"];
  70        if (!attrs && !globalAttrs) return;
  71        if (!attrs) {
  72          attrs = globalAttrs;
  73        } else if (globalAttrs) { // Combine tag-local and global attributes
  74          var set = {};
  75          for (var nm in globalAttrs) if (globalAttrs.hasOwnProperty(nm)) set[nm] = globalAttrs[nm];
  76          for (var nm in attrs) if (attrs.hasOwnProperty(nm)) set[nm] = attrs[nm];
  77          attrs = set;
  78        }
  79        if (token.type == "string" || token.string == "=") { // A value
  80          var before = cm.getRange(Pos(cur.line, Math.max(0, cur.ch - 60)),
  81                                   Pos(cur.line, token.type == "string" ? token.start : token.end));
  82          var atName = before.match(/([^\s\u00a0=<>\"\']+)=$/), atValues;
  83          if (!atName || !attrs.hasOwnProperty(atName[1]) || !(atValues = attrs[atName[1]])) return;
  84          if (typeof atValues == 'function') atValues = atValues.call(this, cm); // Functions can be used to supply values for autocomplete widget
  85          if (token.type == "string") {
  86            prefix = token.string;
  87            var n = 0;
  88            if (/['"]/.test(token.string.charAt(0))) {
  89              quote = token.string.charAt(0);
  90              prefix = token.string.slice(1);
  91              n++;
  92            }
  93            var len = token.string.length;
  94            if (/['"]/.test(token.string.charAt(len - 1))) {
  95              quote = token.string.charAt(len - 1);
  96              prefix = token.string.substr(n, len - 2);
  97            }
  98            if (n) { // an opening quote
  99              var line = cm.getLine(cur.line);
 100              if (line.length > token.end && line.charAt(token.end) == quote) token.end++; // include a closing quote
 101            }
 102            replaceToken = true;
 103          }
 104          var returnHintsFromAtValues = function(atValues) {
 105            if (atValues)
 106              for (var i = 0; i < atValues.length; ++i) if (!prefix || matches(atValues[i], prefix, matchInMiddle))
 107                result.push(quote + atValues[i] + quote);
 108            return returnHints();
 109          };
 110          if (atValues && atValues.then) return atValues.then(returnHintsFromAtValues);
 111          return returnHintsFromAtValues(atValues);
 112        } else { // An attribute name
 113          if (token.type == "attribute") {
 114            prefix = token.string;
 115            replaceToken = true;
 116          }
 117          for (var attr in attrs) if (attrs.hasOwnProperty(attr) && (!prefix || matches(attr, prefix, matchInMiddle)))
 118            result.push(attr);
 119        }
 120      }
 121      function returnHints() {
 122        return {
 123          list: result,
 124          from: replaceToken ? Pos(cur.line, tagStart == null ? token.start : tagStart) : cur,
 125          to: replaceToken ? Pos(cur.line, token.end) : cur
 126        };
 127      }
 128      return returnHints();
 129    }
 130  
 131    CodeMirror.registerHelper("hint", "xml", getHints);
 132  });