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57 行
1.6 KiB

namespace Unity.UIWidgets.ui {
static class LayoutUtils {
public const char CHAR_NBSP = '\u00A0';
public static bool isWordSpace(ushort ch) {
return ch == ' ' || ch == CHAR_NBSP;
}
public static bool isLineEndSpace(char c) {
return c == '\n' || c == ' ' || c == 0x1680 || (0x2000 <= c && c <= 0x200A && c != 0x2007) ||
c == 0x205F || c == 0x3000;
}
public static int getNextWordBreak(string text, int offset, int maxOffset) {
int len = text.Length;
if (len > maxOffset) {
len = maxOffset + 1;
}
if (offset >= len) {
return len;
}
if (isWordBreakAfter(text[offset])) {
return offset + 1;
}
for (int i = offset + 1; i < len; i++) {
if (isWordBreakBefore(text[i])) {
return i;
}
}
return maxOffset;
}
public static bool isWordBreakAfter(ushort c) {
return isWordSpace(c) || (c >= 0x2000 && c <= 0x200a) || c == 0x3000;
}
public static bool isWordBreakBefore(ushort c) {
return isWordBreakAfter(c) || (c >= 0x3400 && c <= 0x9fff);
}
public static int minPowerOfTwo(int i) {
// Assume that int is 32 bit
i--;
i = i | (i >> 1);
i = i | (i >> 2);
i = i | (i >> 4);
i = i | (i >> 8);
i = i | (i >> 16);
return i + 1;
}
}
}