我创建了一个带有拼写错误建议/更正的拼写检查器:
https://gist.github.com/kofifus/4b2f79cadc871a29439d919692099406
演示:https://plnkr.co/edit/0y1wCHXx3k3mZaHFOpHT
以下是代码的相关部分:
首先,我承诺加载词典。我使用typo.js作为字典,如果它们不在本地托管,加载可能需要一段时间,所以最好在登录/CM初始化等之前开始加载:
function loadTypo() {
// hosting the dicts on your local domain will give much faster results
const affDict='https://rawgit.com/ropensci/hunspell/master/inst/dict/en_US.aff';
const dicDict='https://rawgit.com/ropensci/hunspell/master/inst/dict/en_US.dic';
return new Promise(function(resolve, reject) {
var xhr_aff = new XMLHttpRequest();
xhr_aff.open('GET', affDict, true);
xhr_aff.onload = function() {
if (xhr_aff.readyState === 4 && xhr_aff.status === 200) {
//console.log('aff loaded');
var xhr_dic = new XMLHttpRequest();
xhr_dic.open('GET', dicDict, true);
xhr_dic.onload = function() {
if (xhr_dic.readyState === 4 && xhr_dic.status === 200) {
//console.log('dic loaded');
resolve(new Typo('en_US', xhr_aff.responseText, xhr_dic.responseText, { platform: 'any' }));
} else {
console.log('failed loading aff');
reject();
}
};
//console.log('loading dic');
xhr_dic.send(null);
} else {
console.log('failed loading aff');
reject();
}
};
//console.log('loading aff');
xhr_aff.send(null);
});
}
其次,我添加一个叠加层来检测和标记这样的错别字:
cm.spellcheckOverlay={
token: function(stream) {
var ch = stream.peek();
var word = "";
if (rx_word.includes(ch) || ch==='\uE000' || ch==='\uE001') {
stream.next();
return null;
}
while ((ch = stream.peek()) && !rx_word.includes(ch)) {
word += ch;
stream.next();
}
if (! /[a-z]/i.test(word)) return null; // no letters
if (startSpellCheck.ignoreDict[word]) return null;
if (!typo.check(word)) return "spell-error"; // CSS class: cm-spell-error
}
}
cm.addOverlay(cm.spellcheckOverlay);
第三,我使用列表框来显示建议并修正拼写错误:
function getSuggestionBox(typo) {
function sboxShow(cm, sbox, items, x, y) {
let selwidget=sbox.children[0];
let options='';
if (items==='hourglass') {
options='<option>⌛</option>'; // hourglass
} else {
items.forEach(s => options += '<option value="' + s + '">' + s + '</option>');
options+='<option value="##ignoreall##">ignore all</option>';
}
selwidget.innerHTML=options;
selwidget.disabled=(items==='hourglass');
selwidget.size = selwidget.length;
selwidget.value=-1;
// position widget inside cm
let cmrect=cm.getWrapperElement().getBoundingClientRect();
sbox.style.left=x+'px';
sbox.style.top=(y-sbox.offsetHeight/2)+'px';
let widgetRect = sbox.getBoundingClientRect();
if (widgetRect.top<cmrect.top) sbox.style.top=(cmrect.top+2)+'px';
if (widgetRect.right>cmrect.right) sbox.style.left=(cmrect.right-widgetRect.width-2)+'px';
if (widgetRect.bottom>cmrect.bottom) sbox.style.top=(cmrect.bottom-widgetRect.height-2)+'px';
}
function sboxHide(sbox) {
sbox.style.top=sbox.style.left='-1000px';
}
// create suggestions widget
let sbox=document.getElementById('suggestBox');
if (!sbox) {
sbox=document.createElement('div');
sbox.style.zIndex=100000;
sbox.id='suggestBox';
sbox.style.position='fixed';
sboxHide(sbox);
let selwidget=document.createElement('select');
selwidget.multiple='yes';
sbox.appendChild(selwidget);
sbox.suggest=((cm, e) => { // e is the event from cm contextmenu event
if (!e.target.classList.contains('cm-spell-error')) return false; // not on typo
let token=e.target.innerText;
if (!token) return false; // sanity
// save cm instance, token, token coordinates in sbox
sbox.codeMirror=cm;
sbox.token=token;
let tokenRect = e.target.getBoundingClientRect();
let start=cm.coordsChar({left: tokenRect.left+1, top: tokenRect.top+1});
let end=cm.coordsChar({left: tokenRect.right-1, top: tokenRect.top+1});
sbox.cmpos={ line: start.line, start: start.ch, end: end.ch};
// show hourglass
sboxShow(cm, sbox, 'hourglass', e.pageX, e.pageY);
// let the ui refresh with the hourglass & show suggestions
setTimeout(() => {
sboxShow(cm, sbox, typo.suggest(token), e.pageX, e.pageY); // typo.suggest takes a while
}, 100);
e.preventDefault();
return false;
});
sbox.onmouseleave=(e => {
sboxHide(sbox)
});
selwidget.onchange=(e => {
sboxHide(sbox)
let cm=sbox.codeMirror, correction=e.target.value;
if (correction=='##ignoreall##') {
startSpellCheck.ignoreDict[sbox.token]=true;
cm.setOption('maxHighlightLength', (--cm.options.maxHighlightLength) +1); // ugly hack to rerun overlays
} else {
cm.replaceRange(correction, { line: sbox.cmpos.line, ch: sbox.cmpos.start}, { line: sbox.cmpos.line, ch: sbox.cmpos.end});
cm.focus();
cm.setCursor({line: sbox.cmpos.line, ch: sbox.cmpos.start+correction.length});
}
});
document.body.appendChild(sbox);
}
return sbox;
}
希望这会有所帮助!