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Merge pull request #271 from matrix-org/rav/avoid_codepoint_at

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Hack around absence of String.codePointAt on PhantomJS
This commit is contained in:
Richard van der Hoff 2016-04-13 16:37:00 +01:00
commit 3fd9b29422
1 changed files with 30 additions and 9 deletions
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39
src/components/views/avatars/BaseAvatar.js
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@ -99,15 +99,36 @@ module.exports = React.createClass({
} }
}, },
_getInitialLetter: function() { /**
var name = this.props.name; * returns the first (non-sigil) character of 'name',
//For large characters (exceeding 2 bytes), this function will get the correct character. * converted to uppercase
//However, this does NOT get the second character correctly if a large character is before it. */
var initial = String.fromCodePoint(name.codePointAt(0)); _getInitialLetter: function(name) {
if ((initial === '@' || initial === '#') && name[1]) { if (name.length < 1) {
initial = String.fromCodePoint(name.codePointAt(1)); return undefined;
} }
return initial.toUpperCase();
var idx = 0;
var initial = name[0];
if ((initial === '@' || initial === '#') && name[1]) {
idx++;
}
// string.codePointAt(0) would do this, but that isn't supported by
// some browsers (notably PhantomJS).
var chars = 1;
var first = name.charCodeAt(idx);
// check if it’s the start of a surrogate pair
if (first >= 0xD800 && first <= 0xDBFF && name[idx+1]) {
var second = name.charCodeAt(idx+1);
if (second >= 0xDC00 && second <= 0xDFFF) {
chars++;
}
}
var firstChar = name.substring(idx, idx+chars);
return firstChar.toUpperCase();
}, },
render: function() { render: function() {
@ -116,7 +137,7 @@ module.exports = React.createClass({
var imageUrl = this.state.imageUrls[this.state.urlsIndex]; var imageUrl = this.state.imageUrls[this.state.urlsIndex];
if (imageUrl === this.state.defaultImageUrl) { if (imageUrl === this.state.defaultImageUrl) {
var initialLetter = this._getInitialLetter(); var initialLetter = this._getInitialLetter(this.props.name);
return ( return (
<span className="mx_BaseAvatar" {...this.props}> <span className="mx_BaseAvatar" {...this.props}>
<span className="mx_BaseAvatar_initial" aria-hidden="true" <span className="mx_BaseAvatar_initial" aria-hidden="true"