| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef IOS_CHROME_BROWSER_UI_UTIL_UNICODE_UTIL_H_ |
| #define IOS_CHROME_BROWSER_UI_UTIL_UNICODE_UTIL_H_ |
| |
| #import <UIKit/UIKit.h> |
| |
| namespace unicode_util { |
| |
| // Returns true if `c` is a character with R or AL bidirectionality as specified |
| // by RFC 3454. |
| bool IsCharRTL(unichar c); |
| |
| // Returns true if `c` is a character with L bidirectionality as specified by |
| // RFC 3454. |
| bool IsCharLTR(unichar c); |
| |
| // Returns the writing direction for `string` based on rules P2 and P3 of the |
| // Unicode BiDi Algorithm. Returns NSWritingDirectionNatural for strings that |
| // don't contain any bidirectionality information. |
| NSWritingDirection UnicodeWritingDirectionForString(NSString* string); |
| |
| // Converts `string`'s characters to their unicode encodings (i.e. "\u" followed |
| // by 4 hex digits). This is useful for creating string constants for RTL |
| // languages without inducing RTL text layout when viewed in a text editor. |
| NSString* GetEscapedUnicodeStringForString(NSString* string); |
| |
| } // namespace unicode_util |
| |
| #endif // IOS_CHROME_BROWSER_UI_UTIL_UNICODE_UTIL_H_ |
