The Tor Browser: editor/libeditor/text/nsInternetCiter.cpp@129ffea94266 (annotated)

editor/libeditor/text/nsInternetCiter.cpp@129ffea94266 (annotated)

editor/libeditor/text/nsInternetCiter.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- 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/. */
 #include "nsAString.h"
 #include "nsCOMPtr.h"
 #include "nsCRT.h"
 #include "nsDebug.h"
 #include "nsDependentSubstring.h"
 #include "nsError.h"
 #include "nsILineBreaker.h"
 #include "nsInternetCiter.h"
 #include "nsLWBrkCIID.h"
 #include "nsServiceManagerUtils.h"
 #include "nsString.h"
 #include "nsStringIterator.h"
 const char16_t gt ('>');
 const char16_t space (' ');
 const char16_t nbsp (0xa0);
 const char16_t nl ('\n');
 const char16_t cr('\r');
 /** Mail citations using the Internet style: > This is a citation
   */
 nsresult
 nsInternetCiter::GetCiteString(const nsAString& aInString, nsAString& aOutString)
 {
   aOutString.Truncate();
   char16_t uch = nl;
   // Strip trailing new lines which will otherwise turn up
   // as ugly quoted empty lines.
   nsReadingIterator <char16_t> beginIter,endIter;
   aInString.BeginReading(beginIter);
   aInString.EndReading(endIter);
   while(beginIter!= endIter &&
         (*endIter == cr ||
          *endIter == nl))
   {
     --endIter;
   }
   // Loop over the string:
   while (beginIter != endIter)
   {
     if (uch == nl)
     {
       aOutString.Append(gt);
       // No space between >: this is ">>> " style quoting, for
       // compatibility with RFC 2646 and format=flowed.
       if (*beginIter != gt)
         aOutString.Append(space);
     }
     uch = *beginIter;
     ++beginIter;
     aOutString += uch;
   }
   if (uch != nl)
     aOutString += nl;
   return NS_OK;
 }
 nsresult
 nsInternetCiter::StripCitesAndLinebreaks(const nsAString& aInString,
                                          nsAString& aOutString,
                                          bool aLinebreaksToo,
                                          int32_t* aCiteLevel)
 {
   if (aCiteLevel)
     *aCiteLevel = 0;
   aOutString.Truncate();
   nsReadingIterator <char16_t> beginIter,endIter;
   aInString.BeginReading(beginIter);
   aInString.EndReading(endIter);
   while (beginIter!= endIter)  // loop over lines
   {
     // Clear out cites first, at the beginning of the line:
     int32_t thisLineCiteLevel = 0;
     while (beginIter!= endIter && (*beginIter == gt || nsCRT::IsAsciiSpace(*beginIter)))
     {
       if (*beginIter == gt) ++thisLineCiteLevel;
       ++beginIter;
     }
     // Now copy characters until line end:
     while (beginIter != endIter && (*beginIter != '\r' && *beginIter != '\n'))
     {
       aOutString.Append(*beginIter);
       ++beginIter;
     }
     if (aLinebreaksToo)
       aOutString.Append(char16_t(' '));
     else
       aOutString.Append(char16_t('\n'));    // DOM linebreaks, not NS_LINEBREAK
       // Skip over any more consecutive linebreak-like characters:
     while (beginIter != endIter && (*beginIter == '\r' || *beginIter == '\n'))
       ++beginIter;
     // Done with this line -- update cite level
     if (aCiteLevel && (thisLineCiteLevel > *aCiteLevel))
       *aCiteLevel = thisLineCiteLevel;
   }
   return NS_OK;
 }
 nsresult
 nsInternetCiter::StripCites(const nsAString& aInString, nsAString& aOutString)
 {
   return StripCitesAndLinebreaks(aInString, aOutString, false, 0);
 }
 static void AddCite(nsAString& aOutString, int32_t citeLevel)
 {
   for (int32_t i = 0; i < citeLevel; ++i)
     aOutString.Append(gt);
   if (citeLevel > 0)
     aOutString.Append(space);
 }
 static inline void
 BreakLine(nsAString& aOutString, uint32_t& outStringCol,
           uint32_t citeLevel)
 {
   aOutString.Append(nl);
   if (citeLevel > 0)
   {
     AddCite(aOutString, citeLevel);
     outStringCol = citeLevel + 1;
   }
   else
     outStringCol = 0;
 }
 static inline bool IsSpace(char16_t c)
 {
   return (nsCRT::IsAsciiSpace(c) || (c == nl) || (c == cr) || (c == nbsp));
 }
 nsresult
 nsInternetCiter::Rewrap(const nsAString& aInString,
                         uint32_t aWrapCol, uint32_t aFirstLineOffset,
                         bool aRespectNewlines,
                         nsAString& aOutString)
 {
   // There shouldn't be returns in this string, only dom newlines.
   // Check to make sure:
 #ifdef DEBUG
   int32_t cr = aInString.FindChar(char16_t('\r'));
   NS_ASSERTION((cr < 0), "Rewrap: CR in string gotten from DOM!\n");
 #endif /* DEBUG */
   aOutString.Truncate();
   nsresult rv;
   nsCOMPtr<nsILineBreaker> lineBreaker = do_GetService(NS_LBRK_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   // Loop over lines in the input string, rewrapping each one.
   uint32_t length;
   uint32_t posInString = 0;
   uint32_t outStringCol = 0;
   uint32_t citeLevel = 0;
   const nsPromiseFlatString &tString = PromiseFlatString(aInString);
   length = tString.Length();
 #ifdef DEBUG_wrapping
   int loopcount = 0;
 #endif
   while (posInString < length)
   {
 #ifdef DEBUG_wrapping
     printf("Outer loop: '%s'\n",
            NS_LossyConvertUTF16toASCII(Substring(tString, posInString,
                                                 length-posInString)).get());
     printf("out string is now: '%s'\n",
            NS_LossyConvertUTF16toASCII(aOutString).get());
 #endif
     // Get the new cite level here since we're at the beginning of a line
     uint32_t newCiteLevel = 0;
     while (posInString < length && tString[posInString] == gt)
     {
       ++newCiteLevel;
       ++posInString;
       while (posInString < length && tString[posInString] == space)
         ++posInString;
     }
     if (posInString >= length)
       break;
     // Special case: if this is a blank line, maintain a blank line
     // (retain the original paragraph breaks)
     if (tString[posInString] == nl && !aOutString.IsEmpty())
     {
       if (aOutString.Last() != nl)
         aOutString.Append(nl);
       AddCite(aOutString, newCiteLevel);
       aOutString.Append(nl);
       ++posInString;
       outStringCol = 0;
       continue;
     }
     // If the cite level has changed, then start a new line with the
     // new cite level (but if we're at the beginning of the string,
     // don't bother).
     if (newCiteLevel != citeLevel && posInString > newCiteLevel+1
         && outStringCol != 0)
     {
       BreakLine(aOutString, outStringCol, 0);
     }
     citeLevel = newCiteLevel;
     // Prepend the quote level to the out string if appropriate
     if (outStringCol == 0)
     {
       AddCite(aOutString, citeLevel);
       outStringCol = citeLevel + (citeLevel ? 1 : 0);
     }
     // If it's not a cite, and we're not at the beginning of a line in
     // the output string, add a space to separate new text from the
     // previous text.
     else if (outStringCol > citeLevel)
     {
       aOutString.Append(space);
       ++outStringCol;
     }
     // find the next newline -- don't want to go farther than that
     int32_t nextNewline = tString.FindChar(nl, posInString);
     if (nextNewline < 0) nextNewline = length;
     // For now, don't wrap unquoted lines at all.
     // This is because the plaintext edit window has already wrapped them
     // by the time we get them for rewrap, yet when we call the line
     // breaker, it will refuse to break backwards, and we'll end up
     // with a line that's too long and gets displayed as a lone word
     // on a line by itself.  Need special logic to detect this case
     // and break it ourselves without resorting to the line breaker.
     if (citeLevel == 0)
     {
       aOutString.Append(Substring(tString, posInString,
                                   nextNewline-posInString));
       outStringCol += nextNewline - posInString;
       if (nextNewline != (int32_t)length)
       {
         aOutString.Append(nl);
         outStringCol = 0;
       }
       posInString = nextNewline+1;
       continue;
     }
     // Otherwise we have to use the line breaker and loop
     // over this line of the input string to get all of it:
     while ((int32_t)posInString < nextNewline)
     {
 #ifdef DEBUG_wrapping
       if (++loopcount > 1000)
         NS_ASSERTION(false, "possible infinite loop in nsInternetCiter\n");
       printf("Inner loop: '%s'\n",
              NS_LossyConvertUTF16toASCII(Substring(tString, posInString,
                                               nextNewline-posInString)).get());
 #endif
       // Skip over initial spaces:
       while ((int32_t)posInString < nextNewline
              && nsCRT::IsAsciiSpace(tString[posInString]))
         ++posInString;
       // If this is a short line, just append it and continue:
       if (outStringCol + nextNewline - posInString <= aWrapCol-citeLevel-1)
       {
         // If this short line is the final one in the in string,
         // then we need to include the final newline, if any:
         if (nextNewline+1 == (int32_t)length && tString[nextNewline-1] == nl)
           ++nextNewline;
         // Trim trailing spaces:
         int32_t lastRealChar = nextNewline;
         while ((uint32_t)lastRealChar > posInString
                && nsCRT::IsAsciiSpace(tString[lastRealChar-1]))
           --lastRealChar;
         aOutString += Substring(tString,
                                 posInString, lastRealChar - posInString);
         outStringCol += lastRealChar - posInString;
         posInString = nextNewline + 1;
         continue;
       }
       int32_t eol = posInString + aWrapCol - citeLevel - outStringCol;
       // eol is the prospective end of line.
       // We'll first look backwards from there for a place to break.
       // If it's already less than our current position,
       // then our line is already too long, so break now.
       if (eol <= (int32_t)posInString)
       {
         BreakLine(aOutString, outStringCol, citeLevel);
         continue;    // continue inner loop, with outStringCol now at bol
       }
       int32_t breakPt = 0;
       rv = NS_ERROR_BASE;
       if (lineBreaker)
       {
         breakPt = lineBreaker->Prev(tString.get() + posInString,
                                  length - posInString, eol + 1 - posInString);
         if (breakPt == NS_LINEBREAKER_NEED_MORE_TEXT)
         {
           // if we couldn't find a breakpoint looking backwards,
           // and we're not starting a new line, then end this line
           // and loop around again:
           if (outStringCol > citeLevel + 1)
           {
             BreakLine(aOutString, outStringCol, citeLevel);
             continue;    // continue inner loop, with outStringCol now at bol
           }
           // Else try looking forwards:
           breakPt = lineBreaker->Next(tString.get() + posInString,
                                       length - posInString, eol - posInString);
           if (breakPt == NS_LINEBREAKER_NEED_MORE_TEXT) rv = NS_ERROR_BASE;
           else rv = NS_OK;
         }
         else rv = NS_OK;
       }
       // If rv is okay, then breakPt is the place to break.
       // If we get out here and rv is set, something went wrong with line
       // breaker.  Just break the line, hard.
       if (NS_FAILED(rv))
       {
 #ifdef DEBUG_akkana
         printf("nsInternetCiter: LineBreaker not working -- breaking hard\n");
 #endif
         breakPt = eol;
       }
       // Special case: maybe we should have wrapped last time.
       // If the first breakpoint here makes the current line too long,
       // then if we already have text on the current line,
       // break and loop around again.
       // If we're at the beginning of the current line, though,
       // don't force a break since the long word might be a url
       // and breaking it would make it unclickable on the other end.
       const int SLOP = 6;
       if (outStringCol + breakPt > aWrapCol + SLOP
           && outStringCol > citeLevel+1)
       {
         BreakLine(aOutString, outStringCol, citeLevel);
         continue;
       }
       nsAutoString sub (Substring(tString, posInString, breakPt));
       // skip newlines or whitespace at the end of the string
       int32_t subend = sub.Length();
       while (subend > 0 && IsSpace(sub[subend-1]))
         --subend;
       sub.Left(sub, subend);
       aOutString += sub;
       outStringCol += sub.Length();
       // Advance past the whitespace which caused the wrap:
       posInString += breakPt;
       while (posInString < length && IsSpace(tString[posInString]))
         ++posInString;
       // Add a newline and the quote level to the out string
       if (posInString < length)    // not for the last line, though
         BreakLine(aOutString, outStringCol, citeLevel);
     } // end inner loop within one line of aInString
 #ifdef DEBUG_wrapping
     printf("---------\nEnd inner loop: out string is now '%s'\n-----------\n",
            NS_LossyConvertUTF16toASCII(aOutString).get());
 #endif
   } // end outer loop over lines of aInString
 #ifdef DEBUG_wrapping
   printf("Final out string is now: '%s'\n",
          NS_LossyConvertUTF16toASCII(aOutString).get());
 #endif
   return NS_OK;
 }

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editor/libeditor/text/nsInternetCiter.cpp@129ffea94266 (annotated)

editor/libeditor/text/nsInternetCiter.cpp