/**
* Helper to test CodeMirror highlighting modes. It pretty prints output of the
* highlighter and can check against expected styles.
*
* Mode tests are registered by calling test.mode(testName, mode,
* tokens), where mode is a mode object as returned by
* CodeMirror.getMode, and tokens is an array of lines that make up
* the test.
*
* These lines are strings, in which styled stretches of code are
* enclosed in brackets `[]`, and prefixed by their style. For
* example, `[keyword if]`. Brackets in the code itself must be
* duplicated to prevent them from being interpreted as token
* boundaries. For example `a[[i]]` for `a[i]`. If a token has
* multiple styles, the styles must be separated by ampersands, for
* example `[tag&error </hmtl>]`.
*
* See the test.js files in the css, markdown, gfm, and stex mode
* directories for examples.
*/
(function() {
function findSingle(str, pos, ch) {
for (;;) {
var found = str.indexOf(ch, pos);
if (found == -1) return null;
if (str.charAt(found + 1) != ch) return found;
pos = found + 2;
}
}
var styleName = /[\w&-_]+/g;
function parseTokens(strs) {
var tokens = [], plain = "";
for (var i = 0; i < strs.length; ++i) {
if (i) plain += "\n";
var str = strs[i], pos = 0;
while (pos < str.length) {
var style = null, text;
if (str.charAt(pos) == "[" && str.charAt(pos+1) != "[") {
styleName.lastIndex = pos + 1;
var m = styleName.exec(str);
style = m[0].replace(/&/g, " ");
var textStart = pos + style.length + 2;
var end = findSingle(str, textStart, "]");
if (end == null) throw new Error("Unterminated token at " + pos + " in '" + str + "'" + style);
text = str.slice(textStart, end);
pos = end + 1;
} else {
var end = findSingle(str, pos, "[");
if (end == null) end = str.length;
text = str.slice(pos, end);
pos = end;
}
text = text.replace(/\[\[|\]\]/g, function(s) {return s.charAt(0);});
tokens.push({style: style, text: text});
plain += text;
}
}
return {tokens: tokens, plain: plain};
}
test.mode = function(name, mode, tokens, modeName) {
var data = parseTokens(tokens);
return test((modeName || mode.name) + "_" + name, function() {
return compare(data.plain, data.tokens, mode);
});
};
function esc(str) {
return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
}
function compare(text, expected, mode) {
var expectedOutput = [];
for (var i = 0; i < expected.length; ++i) {
var sty = expected[i].style;
if (sty && sty.indexOf(" ")) sty = sty.split(' ').sort().join(' ');
expectedOutput.push({style: sty, text: expected[i].text});
}
var observedOutput = highlight(text, mode);
var s = "";
var diff = highlightOutputsDifferent(expectedOutput, observedOutput);
if (diff != null) {
s += '<div class="mt-test mt-fail">';
s += '<pre>' + esc(text) + '</pre>';
s += '<div class="cm-s-default">';
s += 'expected:';
s += prettyPrintOutputTable(expectedOutput, diff);
s += 'observed: [<a onclick="this.parentElement.className+=\' mt-state-unhide\'">display states</a>]';
s += prettyPrintOutputTable(observedOutput, diff);
s += '</div>';
s += '</div>';
}
if (observedOutput.indentFailures) {
for (var i = 0; i < observedOutput.indentFailures.length; i++)
s += "<div class='mt-test mt-fail'>" + esc(observedOutput.indentFailures[i]) + "</div>";
}
if (s) throw new Failure(s);
}
function stringify(obj) {
function replacer(key, obj) {
if (typeof obj == "function") {
var m = obj.toString().match(/function\s*[^\s(]*/);
return m ? m[0] : "function";
}
return obj;
}
if (window.JSON && JSON.stringify)
return JSON.stringify(obj, replacer, 2);
return "[unsupported]"; // Fail safely if no native JSON.
}
function highlight(string, mode) {
var state = mode.startState();
var lines = string.replace(/\r\n/g,'\n').split('\n');
var st = [], pos = 0;
for (var i = 0; i < lines.length; ++i) {
var line = lines[i], newLine = true;
if (mode.indent) {
var ws = line.match(/^\s*/)[0];
var indent = mode.indent(state, line.slice(ws.length), line);
if (indent != CodeMirror.Pass && indent != ws.length)
(st.indentFailures || (st.indentFailures = [])).push(
"Indentation of line " + (i + 1) + " is " + indent + " (expected " + ws.length + ")");
}
var stream = new CodeMirror.StringStream(line, 4, {
lookAhead: function(n) { return lines[i + n] }
});
if (line == "" && mode.blankLine) mode.blankLine(state);
/* Start copied code from CodeMirror.highlight */
while (!stream.eol()) {
for (var j = 0; j < 10 && stream.start >= stream.pos; j++)
var compare = mode.token(stream, state);
if (j == 10)
throw new Failure("Failed to advance the stream." + stream.string + " " + stream.pos);
var substr = stream.current();
if (compare && compare.indexOf(" ") > -1) compare = compare.split(' ').sort().join(' ');
stream.start = stream.pos;
if (pos && st[pos-1].style == compare && !newLine) {
st[pos-1].text += substr;
} else if (substr) {
st[pos++] = {style: compare, text: substr, state: stringify(state)};
}
// Give up when line is ridiculously long
if (stream.pos > 5000) {
st[pos++] = {style: null, text: this.text.slice(stream.pos)};
break;
}
newLine = false;
}
}
return st;
}
function highlightOutputsDifferent(o1, o2) {
var minLen = Math.min(o1.length, o2.length);
for (var i = 0; i < minLen; ++i)
if (o1[i].style != o2[i].style || o1[i].text != o2[i].text) return i;
if (o1.length > minLen || o2.length > minLen) return minLen;
}
function prettyPrintOutputTable(output, diffAt) {
var s = '<table class="mt-output">';
s += '<tr>';
for (var i = 0; i < output.length; ++i) {
var style = output[i].style, val = output[i].text;
s +=
'<td class="mt-token"' + (i == diffAt ? " style='background: pink'" : "") + '>' +
'<span class="cm-' + esc(String(style)) + '">' +
esc(val.replace(/ /g,'\xb7')) + // · MIDDLE DOT
'</span>' +
'</td>';
}
s += '</tr><tr>';
for (var i = 0; i < output.length; ++i) {
s += '<td class="mt-style"><span>' + (output[i].style || null) + '</span></td>';
}
if(output[0].state) {
s += '</tr><tr class="mt-state-row" title="State AFTER each token">';
for (var i = 0; i < output.length; ++i) {
s += '<td class="mt-state"><pre>' + esc(output[i].state) + '</pre></td>';
}
}
s += '</tr></table>';
return s;
}
})();
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