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Added Emoji encoder enhancement for postBox
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| settingsLoadedEvent.addHandler(function() { | ||
| /* | ||
| * Encodes string Astrals (Emoji's) into prefixed HTML entities to | ||
| * workaround Chatty's poor support for unicode surrogate pairs. | ||
| */ | ||
| EmojiPoster = { | ||
| install: function(postBox) { | ||
| // install only once per postbox | ||
| let _postBtn = postBox.querySelector("button#frm_submit"); | ||
| if (!_postBtn.hasAttribute("cloned")) { | ||
| // remove all events on the 'Post' button so we can intercept submission | ||
| let _clonedPostBtn = _postBtn.cloneNode(true); | ||
| _clonedPostBtn.removeAttribute("onclick"); | ||
| _clonedPostBtn.setAttribute("cloned", ""); | ||
| _postBtn.parentNode.replaceChild(_clonedPostBtn, _postBtn); | ||
|
|
||
| // monkeypatch the submit and click events | ||
| [ "click", "submit" ].forEach(evt => { | ||
| document.addEventListener(evt, (e) => { | ||
| if (e.target.matches("#frm_submit")) { | ||
| // block any remaining attached listeners | ||
| e.preventDefault(); | ||
| e.stopImmediatePropagation(); | ||
| //console.log("EmojiPoster redirected submit event"); | ||
| let _postBox = document.getElementById("frm_body"); | ||
| if (_postBox && _postBox.value.length > 0) { | ||
| _postBox.value = EmojiPoster.handleEncoding(_postBox.value); | ||
| EmojiPoster.handleSubmit(_postBox.value); | ||
| } | ||
| } | ||
| }, true); | ||
| }); | ||
|
|
||
| // educate the user on how to open the OS' Emoji Picker | ||
| let _postFormParent = postBox.querySelector("#postform fieldset"); | ||
| let _emojiTaglineElem = document.createElement("p"); | ||
| _emojiTaglineElem.setAttribute("class", "emoji-tagline"); | ||
| _emojiTaglineElem.innerHTML = "Use <span>Win + ;</span> (Windows) or <span>Cmd + Ctrl + Space</span> (MacOS) to bring up the OS Emoji Picker."; | ||
| _postFormParent.appendChild(_emojiTaglineElem); | ||
| } | ||
| }, | ||
|
|
||
| handleSubmit: function(postText) { | ||
| if (EmojiPoster.countEntities(postText) > 5) { | ||
| // normal post | ||
| $('#frm_submit').attr('disabled', 'disabled').css('color', '#E9E9DE'); | ||
| $('#postform').submit(); | ||
| $('body').trigger( | ||
| 'chatty-new-post-reply', | ||
| [ ($('#frm_submit').closest('div.root > ul > li').first().attr('id')) ] | ||
| ); | ||
| return false; | ||
| } else { | ||
| // the server doesn't know that an astral is a single character | ||
| alert("Please post something at least 5 characters long."); | ||
| } | ||
| }, | ||
|
|
||
| handleEncoding: function(text) { | ||
| // see: https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae | ||
| // credit: Mathias Bynens (https://github.com/mathiasbynens/he) | ||
| let _matchAstrals = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g; | ||
| let _matchBMPs = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g; | ||
| let escapeBmp = symbol => escapeCodePoint(symbol.charCodeAt(0)); | ||
| let escapeCP = codePoint => `&#x${codePoint.toString(16).toUpperCase()};`; | ||
| return text.replace(_matchAstrals, $0 => { | ||
| let _high = $0.charCodeAt(0); | ||
| let _low = $0.charCodeAt(1); | ||
| let _cp = (_high - 0xd800) * 0x400 + _low - 0xdc00 + 0x10000; | ||
| return escapeCP(_cp); | ||
| }).replace(_matchBMPs, escapeBmp); | ||
| }, | ||
|
|
||
| countEntities: function(text) { | ||
| // sums to the real length of text containing astrals | ||
| let _astrals = text.match(/(&#x[A-Fa-f0-9]+;)/igm); | ||
| let _astralsLen = _astrals ? _astrals.reduce((t, v) => t + v.length, 0) : 0; | ||
| let _count = _astrals ? | ||
| (text.length - _astralsLen + _astrals.length) : | ||
| text.length; | ||
| return _count; | ||
| } | ||
| }; | ||
|
|
||
| processPostBoxEvent.addHandler(EmojiPoster.install); | ||
| }); |
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