Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.regex.Pattern;

public class Main {
    private static final Pattern patternBreakingWebView = Pattern.compile("[" + "\\u0627"
            + "\\u0600\\u0601\\u0602\\u0603\\u0606\\u0607\\u0608\\u0609\\u060A\\u060B\\u060D\\u060E"
            + "\\u0610\\u0611\\u0612\\u0613\\u0614\\u0615\\u0616\\u0617\\u0618\\u0619\\u061A\\u061B\\u061E\\u061F"
            + "\\u0621" + "\\u063B\\u063C\\u063D\\u063E\\u063F" + "\\u0640\\u064B\\u064C\\u064D\\u064E\\u064F"
            + "\\u0650\\u0651\\u0652\\u0653\\u0654\\u0655\\u0656\\u0657\\u0658\\u0659\\u065A\\u065B\\u065C\\u065D\\u065E"
            + "\\u0660\\u066A\\u066B\\u066C\\u066F\\u0670\\u0672'"
            + "\\u06D4\\u06D5\\u06D6\\u06D7\\u06D8\\u06D9\\u06DA\\u06DB\\u06DC\\u06DF"
            + "\\u06E0\\u06E1\\u06E2\\u06E3\\u06E4\\u06E5\\u06E6\\u06E7\\u06E8\\u06E9\\u06EA\\u06EB\\u06EC\\u06ED\\u06EE\\u06EF"
            + "\\u06D6\\u06D7\\u06D8\\u06D9\\u06DA\\u06DB\\u06DC\\u06DD\\u06DE\\u06DF" + "\\u06F0\\u06FD"
            + "\\uFE70\\uFE71\\uFE72\\uFE73\\uFE74\\uFE75\\uFE76\\uFE77\\uFE78\\uFE79\\uFE7A\\uFE7B\\uFE7C\\uFE7D\\uFE7E\\uFE7F"
            + "\\uFC5E\\uFC5F\\uFC60\\uFC61\\uFC62\\uFC63" + "]");

    public static StringBuffer manualRTL(StringBuffer text, boolean forWebView) {

        if (forWebView) {
            if (patternBreakingWebView.matcher(text).find()) {
                // handle BiDi manually
                // global direction is LTR because of HTML markup
                StringBuffer ltr = new StringBuffer(""), rtl = new StringBuffer("");
                int i = 0;
                while (i < text.length()) {
                    char c = text.charAt(i);
                    if (isStrongLeftToRight(c) || !isStrongRightToLeft(c)) {
                        while (i < text.length() && !isStrongRightToLeft(text.charAt(i))) {
                            ltr.append(text.charAt(i));
                            i++;
                        }
                        if (i == text.length()) {
                            break;
                        }
                    }
                    if (isStrongRightToLeft(text.charAt(i))) {
                        while (i < text.length() && !isStrongLeftToRight(text.charAt(i))) {
                            // additional end condition: start of an HTML tag
                            if (text.charAt(i) == '<') {
                                break;
                            }
                            rtl.append(text.charAt(i));
                            i++;
                        }
                        // reverse only words that Android will not display correctly by itself
                        if (patternBreakingWebView.matcher(rtl).find()) {
                            ltr.append(rtl.reverse());
                        } else {
                            ltr.append(rtl);
                        }
                        rtl = new StringBuffer("");
                    }
                }
                return ltr;
            }
        }
        return text;
    }

    public static boolean isStrongLeftToRight(char c) {
        byte dir = Character.getDirectionality(c);
        return (dir == Character.DIRECTIONALITY_LEFT_TO_RIGHT)
                || (dir == Character.DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING)
                || (dir == Character.DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE);
    }

    public static boolean isStrongRightToLeft(char c) {
        byte dir = Character.getDirectionality(c);
        return (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT)
                || (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC)
                || (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING)
                || (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE);
    }
}