The Tor Browser: intl/icu/source/i18n/strrepl.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/strrepl.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/strrepl.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 **********************************************************************
 *   Copyright (c) 2002-2012, International Business Machines Corporation
 *   and others.  All Rights Reserved.
 **********************************************************************
 *   Date        Name        Description
 *   01/21/2002  aliu        Creation.
 **********************************************************************
 */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_TRANSLITERATION
 #include "unicode/uniset.h"
 #include "unicode/utf16.h"
 #include "strrepl.h"
 #include "rbt_data.h"
 #include "util.h"
 U_NAMESPACE_BEGIN
 UnicodeReplacer::~UnicodeReplacer() {}
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(StringReplacer)
 /**
  * Construct a StringReplacer that sets the emits the given output
  * text and sets the cursor to the given position.
  * @param theOutput text that will replace input text when the
  * replace() method is called.  May contain stand-in characters
  * that represent nested replacers.
  * @param theCursorPos cursor position that will be returned by
  * the replace() method
  * @param theData transliterator context object that translates
  * stand-in characters to UnicodeReplacer objects
  */
 StringReplacer::StringReplacer(const UnicodeString& theOutput,
                                int32_t theCursorPos,
                                const TransliterationRuleData* theData) {
     output = theOutput;
     cursorPos = theCursorPos;
     hasCursor = TRUE;
     data = theData;
     isComplex = TRUE;
 }
 /**
  * Construct a StringReplacer that sets the emits the given output
  * text and does not modify the cursor.
  * @param theOutput text that will replace input text when the
  * replace() method is called.  May contain stand-in characters
  * that represent nested replacers.
  * @param theData transliterator context object that translates
  * stand-in characters to UnicodeReplacer objects
  */
 StringReplacer::StringReplacer(const UnicodeString& theOutput,
                                const TransliterationRuleData* theData) {
     output = theOutput;
     cursorPos = 0;
     hasCursor = FALSE;
     data = theData;
     isComplex = TRUE;
 }
 /**
  * Copy constructor.
  */
 StringReplacer::StringReplacer(const StringReplacer& other) :
     UnicodeFunctor(other),
     UnicodeReplacer(other)
 {
     output = other.output;
     cursorPos = other.cursorPos;
     hasCursor = other.hasCursor;
     data = other.data;
     isComplex = other.isComplex;
 }
 /**
  * Destructor
  */
 StringReplacer::~StringReplacer() {
 }
 /**
  * Implement UnicodeFunctor
  */
 UnicodeFunctor* StringReplacer::clone() const {
     return new StringReplacer(*this);
 }
 /**
  * Implement UnicodeFunctor
  */
 UnicodeReplacer* StringReplacer::toReplacer() const {
   return const_cast<StringReplacer *>(this);
 }
 /**
  * UnicodeReplacer API
  */
 int32_t StringReplacer::replace(Replaceable& text,
                                 int32_t start,
                                 int32_t limit,
                                 int32_t& cursor) {
     int32_t outLen;
     int32_t newStart = 0;
     // NOTE: It should be possible to _always_ run the complex
     // processing code; just slower.  If not, then there is a bug
     // in the complex processing code.
     // Simple (no nested replacers) Processing Code :
     if (!isComplex) {
         text.handleReplaceBetween(start, limit, output);
         outLen = output.length();
         // Setup default cursor position (for cursorPos within output)
         newStart = cursorPos;
     }
     // Complex (nested replacers) Processing Code :
     else {
         /* When there are segments to be copied, use the Replaceable.copy()
          * API in order to retain out-of-band data.  Copy everything to the
          * end of the string, then copy them back over the key.  This preserves
          * the integrity of indices into the key and surrounding context while
          * generating the output text.
          */
         UnicodeString buf;
         int32_t oOutput; // offset into 'output'
         isComplex = FALSE;
         // The temporary buffer starts at tempStart, and extends
         // to destLimit.  The start of the buffer has a single
         // character from before the key.  This provides style
         // data when addition characters are filled into the
         // temporary buffer.  If there is nothing to the left, use
         // the non-character U+FFFF, which Replaceable subclasses
         // should treat specially as a "no-style character."
         // destStart points to the point after the style context
         // character, so it is tempStart+1 or tempStart+2.
         int32_t tempStart = text.length(); // start of temp buffer
         int32_t destStart = tempStart; // copy new text to here
         if (start > 0) {
             int32_t len = U16_LENGTH(text.char32At(start-1));
             text.copy(start-len, start, tempStart);
             destStart += len;
         } else {
             UnicodeString str((UChar) 0xFFFF);
             text.handleReplaceBetween(tempStart, tempStart, str);
             destStart++;
         }
         int32_t destLimit = destStart;
         for (oOutput=0; oOutput<output.length(); ) {
             if (oOutput == cursorPos) {
                 // Record the position of the cursor
                 newStart = destLimit - destStart; // relative to start
             }
             UChar32 c = output.char32At(oOutput);
             UnicodeReplacer* r = data->lookupReplacer(c);
             if (r == NULL) {
                 // Accumulate straight (non-segment) text.
                 buf.append(c);
             } else {
                 isComplex = TRUE;
                 // Insert any accumulated straight text.
                 if (buf.length() > 0) {
                     text.handleReplaceBetween(destLimit, destLimit, buf);
                     destLimit += buf.length();
                     buf.truncate(0);
                 }
                 // Delegate output generation to replacer object
                 int32_t len = r->replace(text, destLimit, destLimit, cursor);
                 destLimit += len;
             }
             oOutput += U16_LENGTH(c);
         }
         // Insert any accumulated straight text.
         if (buf.length() > 0) {
             text.handleReplaceBetween(destLimit, destLimit, buf);
             destLimit += buf.length();
         }
         if (oOutput == cursorPos) {
             // Record the position of the cursor
             newStart = destLimit - destStart; // relative to start
         }
         outLen = destLimit - destStart;
         // Copy new text to start, and delete it
         text.copy(destStart, destLimit, start);
         text.handleReplaceBetween(tempStart + outLen, destLimit + outLen, UnicodeString());
         // Delete the old text (the key)
         text.handleReplaceBetween(start + outLen, limit + outLen, UnicodeString());
     }
     if (hasCursor) {
         // Adjust the cursor for positions outside the key.  These
         // refer to code points rather than code units.  If cursorPos
         // is within the output string, then use newStart, which has
         // already been set above.
         if (cursorPos < 0) {
             newStart = start;
             int32_t n = cursorPos;
             // Outside the output string, cursorPos counts code points
             while (n < 0 && newStart > 0) {
                 newStart -= U16_LENGTH(text.char32At(newStart-1));
                 ++n;
             }
             newStart += n;
         } else if (cursorPos > output.length()) {
             newStart = start + outLen;
             int32_t n = cursorPos - output.length();
             // Outside the output string, cursorPos counts code points
             while (n > 0 && newStart < text.length()) {
                 newStart += U16_LENGTH(text.char32At(newStart));
                 --n;
             }
             newStart += n;
         } else {
             // Cursor is within output string.  It has been set up above
             // to be relative to start.
             newStart += start;
         }
         cursor = newStart;
     }
     return outLen;
 }
 /**
  * UnicodeReplacer API
  */
 UnicodeString& StringReplacer::toReplacerPattern(UnicodeString& rule,
                                                  UBool escapeUnprintable) const {
     rule.truncate(0);
     UnicodeString quoteBuf;
     int32_t cursor = cursorPos;
     // Handle a cursor preceding the output
     if (hasCursor && cursor < 0) {
         while (cursor++ < 0) {
             ICU_Utility::appendToRule(rule, (UChar)0x0040 /*@*/, TRUE, escapeUnprintable, quoteBuf);
         }
         // Fall through and append '|' below
     }
     for (int32_t i=0; i<output.length(); ++i) {
         if (hasCursor && i == cursor) {
             ICU_Utility::appendToRule(rule, (UChar)0x007C /*|*/, TRUE, escapeUnprintable, quoteBuf);
         }
         UChar c = output.charAt(i); // Ok to use 16-bits here
         UnicodeReplacer* r = data->lookupReplacer(c);
         if (r == NULL) {
             ICU_Utility::appendToRule(rule, c, FALSE, escapeUnprintable, quoteBuf);
         } else {
             UnicodeString buf;
             r->toReplacerPattern(buf, escapeUnprintable);
             buf.insert(0, (UChar)0x20);
             buf.append((UChar)0x20);
             ICU_Utility::appendToRule(rule, buf,
                                       TRUE, escapeUnprintable, quoteBuf);
         }
     }
     // Handle a cursor after the output.  Use > rather than >= because
     // if cursor == output.length() it is at the end of the output,
     // which is the default position, so we need not emit it.
     if (hasCursor && cursor > output.length()) {
         cursor -= output.length();
         while (cursor-- > 0) {
             ICU_Utility::appendToRule(rule, (UChar)0x0040 /*@*/, TRUE, escapeUnprintable, quoteBuf);
         }
         ICU_Utility::appendToRule(rule, (UChar)0x007C /*|*/, TRUE, escapeUnprintable, quoteBuf);
     }
     // Flush quoteBuf out to result
     ICU_Utility::appendToRule(rule, -1,
                               TRUE, escapeUnprintable, quoteBuf);
     return rule;
 }
 /**
  * Implement UnicodeReplacer
  */
 void StringReplacer::addReplacementSetTo(UnicodeSet& toUnionTo) const {
     UChar32 ch;
     for (int32_t i=0; i<output.length(); i+=U16_LENGTH(ch)) {
     ch = output.char32At(i);
     UnicodeReplacer* r = data->lookupReplacer(ch);
     if (r == NULL) {
         toUnionTo.add(ch);
     } else {
         r->addReplacementSetTo(toUnionTo);
     }
     }
 }
 /**
  * UnicodeFunctor API
  */
 void StringReplacer::setData(const TransliterationRuleData* d) {
     data = d;
     int32_t i = 0;
     while (i<output.length()) {
         UChar32 c = output.char32At(i);
         UnicodeFunctor* f = data->lookup(c);
         if (f != NULL) {
             f->setData(data);
         }
         i += U16_LENGTH(c);
     }
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
 //eof

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intl/icu/source/i18n/strrepl.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/strrepl.cpp