Press n or j to go to the next uncovered block, b, p or k for the previous block.
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return code >= 0xd800 && code <= 0xdbff;
}
export const unicodeSplit = function (message, options) {
options = options || { summary: false };
if (message === '') {
return {
parts: [
{
content: options.summary ? undefined : '',
length: 0,
bytes: 0
}
],
totalLength: 0,
totalBytes: 0
};
}
const messages = [];
let length = 0;
let bytes = 0;
let totalBytes = 0;
let totalLength = 0;
let partStart = 0;
function bank(partEnd = undefined) {
const msg = {
content: options.summary
? undefined
: partEnd
? message.substring(partStart, partEnd + 1)
: message.substring(partStart),
length: length,
bytes: bytes
};
messages.push(msg);
partStart = partEnd + 1;
totalLength += length;
length = 0;
totalBytes += bytes;
bytes = 0;
}
for (let i = 0, count = message.length; i < count; i++) {
const code = message.charCodeAt(i);
const highSurrogate = isHighSurrogate(code);
if (highSurrogate) {
if (bytes === 132) bank(i - 1);
bytes += 2;
i++;
}
bytes += 2;
length++;
if (bytes === 134) bank(i);
}
if (bytes > 0) bank();
if (messages[1] && totalBytes <= 140) {
return {
parts: [
{
content: options.summary ? undefined : message,
length: totalLength,
bytes: totalBytes
}
],
totalLength: totalLength,
totalBytes: totalBytes
};
}
return {
parts: messages,
totalLength: totalLength,
totalBytes: totalBytes
};
};
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