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Merge from vscode 1df23554b2e3d5f1efc6fbc76ee61d3f7f186c6d

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This commit is contained in:
ADS Merger
2020-03-12 06:51:03 +00:00
parent a68a6b9e44
commit b5592959c7
56 changed files with 1091 additions and 558 deletions
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32
src/vs/base/common/strings.ts
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@@ -428,29 +428,27 @@ export function commonSuffixLength(a: string, b: string): number {
return len;
}
// --- unicode
// http://en.wikipedia.org/wiki/Surrogate_pair
// Returns the code point starting at a specified index in a string
// Code points U+0000 to U+D7FF and U+E000 to U+FFFF are represented on a single character
// Code points U+10000 to U+10FFFF are represented on two consecutive characters
//export function getUnicodePoint(str:string, index:number, len:number):number {
// const chrCode = str.charCodeAt(index);
// if (0xD800 <= chrCode && chrCode <= 0xDBFF && index + 1 < len) {
// const nextChrCode = str.charCodeAt(index + 1);
// if (0xDC00 <= nextChrCode && nextChrCode <= 0xDFFF) {
// return (chrCode - 0xD800) << 10 + (nextChrCode - 0xDC00) + 0x10000;
// }
// }
// return chrCode;
//}
/**
* See http://en.wikipedia.org/wiki/Surrogate_pair
*/
export function isHighSurrogate(charCode: number): boolean {
return (0xD800 <= charCode && charCode <= 0xDBFF);
}
/**
* See http://en.wikipedia.org/wiki/Surrogate_pair
*/
export function isLowSurrogate(charCode: number): boolean {
return (0xDC00 <= charCode && charCode <= 0xDFFF);
}
/**
* See http://en.wikipedia.org/wiki/Surrogate_pair
*/
export function computeCodePoint(highSurrogate: number, lowSurrogate: number): number {
return ((highSurrogate - 0xD800) << 10) + (lowSurrogate - 0xDC00) + 0x10000;
}
/**
* get the code point that begins at offset `offset`
*/
@@ -459,7 +457,7 @@ export function getNextCodePoint(str: string, len: number, offset: number): numb
if (isHighSurrogate(charCode) && offset + 1 < len) {
const nextCharCode = str.charCodeAt(offset + 1);
if (isLowSurrogate(nextCharCode)) {
return ((charCode - 0xD800) << 10) + (nextCharCode - 0xDC00) + 0x10000;
return computeCodePoint(charCode, nextCharCode);
}
}
return charCode;
@@ -473,7 +471,7 @@ function getPrevCodePoint(str: string, offset: number): number {
if (isLowSurrogate(charCode) && offset > 1) {
const prevCharCode = str.charCodeAt(offset - 2);
if (isHighSurrogate(prevCharCode)) {
return ((prevCharCode - 0xD800) << 10) + (charCode - 0xDC00) + 0x10000;
return computeCodePoint(prevCharCode, charCode);
}
}
return charCode;