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Fix RTL text direction rendering (reopened) (#1722)

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Co-authored-by: dwelle <luzar.david@gmail.com>
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Youness Fkhach 2020-06-07 10:55:08 +01:00 • committed by GitHub
parent f7c4efbd35
commit d171e9705d
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2 changed files with 45 additions and 5 deletions
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15
src/utils.ts
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@ -227,3 +227,18 @@ export const sceneCoordsToViewportCoords = (
export const getGlobalCSSVariable = (name: string) =>
getComputedStyle(document.documentElement).getPropertyValue(`--${name}`);
const RS_LTR_CHARS =
"A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF" +
"\u2C00-\uFB1C\uFDFE-\uFE6F\uFEFD-\uFFFF";
const RS_RTL_CHARS = "\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC";
const RE_RTL_CHECK = new RegExp(`^[^${RS_LTR_CHARS}]*[${RS_RTL_CHARS}]`);
/**
* Checks whether first directional character is RTL. Meaning whether it starts
* with RTL characters, or indeterminate (numbers etc.) characters followed by
* RTL.
* See https://github.com/excalidraw/excalidraw/pull/1722#discussion_r436340171
*/
export const isRTL = (text: string) => {
return RE_RTL_CHECK.test(text);
};