1 files changed, 74 insertions, 0 deletions
diff --git a/intl/lwbrk/nsILineBreaker.h b/intl/lwbrk/nsILineBreaker.h
new file mode 100644
index 000000000..19adbac10
--- /dev/null
+++ b/intl/lwbrk/nsILineBreaker.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef nsILineBreaker_h__
+#define nsILineBreaker_h__
+
+#include "nsISupports.h"
+
+#include "nscore.h"
+
+#define NS_LINEBREAKER_NEED_MORE_TEXT -1
+
+// 	{0x4b0b9e04-6ffb-4647-aa5f-2fa2ebd883e8}
+#define NS_ILINEBREAKER_IID \
+{0x4b0b9e04, 0x6ffb, 0x4647, \
+    {0xaa, 0x5f, 0x2f, 0xa2, 0xeb, 0xd8, 0x83, 0xe8}}
+
+class nsILineBreaker : public nsISupports
+{
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ILINEBREAKER_IID)
+
+  enum {
+    kWordBreak_Normal   = 0, // default
+    kWordBreak_BreakAll = 1, // break all
+    kWordBreak_KeepAll  = 2  // always keep 
+  };
+
+  virtual int32_t Next( const char16_t* aText, uint32_t aLen, 
+                        uint32_t aPos) = 0;
+
+  virtual int32_t Prev( const char16_t* aText, uint32_t aLen, 
+                        uint32_t aPos) = 0;
+
+  // Call this on a word with whitespace at either end. We will apply JISx4051
+  // rules to find breaks inside the word. aBreakBefore is set to the break-
+  // before status of each character; aBreakBefore[0] will always be false
+  // because we never return a break before the first character.
+  // aLength is the length of the aText array and also the length of the aBreakBefore
+  // output array.
+  virtual void GetJISx4051Breaks(const char16_t* aText, uint32_t aLength,
+                                 uint8_t aWordBreak,
+                                 uint8_t* aBreakBefore) = 0;
+  virtual void GetJISx4051Breaks(const uint8_t* aText, uint32_t aLength,
+                                 uint8_t aWordBreak,
+                                 uint8_t* aBreakBefore) = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsILineBreaker, NS_ILINEBREAKER_IID)
+
+static inline bool
+NS_IsSpace(char16_t u)
+{
+  return u == 0x0020 ||                  // SPACE
+         u == 0x0009 ||                  // CHARACTER TABULATION
+         u == 0x000D ||                  // CARRIAGE RETURN
+         u == 0x1680 ||                  // OGHAM SPACE MARK
+         (0x2000 <= u && u <= 0x2006) || // EN QUAD, EM QUAD, EN SPACE,
+                                         // EM SPACE, THREE-PER-EM SPACE,
+                                         // FOUR-PER-SPACE, SIX-PER-EM SPACE,
+         (0x2008 <= u && u <= 0x200B) || // PUNCTUATION SPACE, THIN SPACE,
+                                         // HAIR SPACE, ZERO WIDTH SPACE
+         u == 0x205F;                    // MEDIUM MATHEMATICAL SPACE 
+}
+
+static inline bool
+NS_NeedsPlatformNativeHandling(char16_t aChar)
+{
+  return (0x0e01 <= aChar && aChar <= 0x0fff) || // Thai, Lao, Tibetan
+         (0x1780 <= aChar && aChar <= 0x17ff);   // Khmer
+}
+
+#endif  /* nsILineBreaker_h__ */